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Ceronix Service Manual 03.02

Contents

1. Remote Connector NOTES lt 5 5100 004 homm A S _ 100 132 300 139 F 4937 141 62K 143A POWER VALUE PART No BD scH u NA V 1371 if CI 1491 CRT A68AEG25X07 CPP1707 5 a 6 1 ER TS 1 x 02 533 FR205 142 aa 027 41 115A 1180 133 5 CC 140 2 Wire Tie 145A V 113 115 DC 114V DC S AE y 200K 005 Tus A 00 531 O U 3 330uF 250V cag Hf 31 5kHz S V ES anne gt JA zn Power Supply Control 144 E vf 60Hz S 62K 011 le 008 o 0 mri Ham TOOM 134 e __ Video Board CPA4232 S 1K 012 Nin 019 I m gro Video Positive Analog 0 00 0 70V 5 A E milli 24 y ei Power 220VAC LLL KS HRS aaa o 4148 018 O 9 ower S LAO t 1g a dl A6A 5 i 15 8K 020 a 11411025 GE va E CPQ1304 o er 036 lt 5100 021 o Be 136 NE pur lo AN T X lt KS INGE aa z N jj
2. GD C QQ RR SS TT VV WW XX YY ZZ Socket Board Red Video Amplifier i 12V 10 ccu UNPLUG 1 RED g DEGAUSSING i COIL BEFORE WORKING ON CHASSIS Degaussing Coil 10K 1 2W GRID PULSE EHT 1 EIERN Red 1 FOCUS White 42 FOCUS A SCREEN 330 e 816 812 i a BEAM OFF ON POWER DOWN _ FIL EEE EEE Fil E 8 av o m aw 2 134937 E 416V 16V i 16V 120V Source 12V ara 180 uF 1 2W cc GND pow d GND c3 C t t tt 0 20 i EIE BEA TC6 Auto Bias Vs lt TC10 10 3 BIAS CONTROL LINE 120V rd rd 4126fV 7m 7m 7a 7m 7m 7m ol siis OO GND 2 2563675 1N4007 1 4007 1 4007 CABLE ASS A h AUTO BIAS IC 4 Circuit 62K 1 GND 927 Vcc 22 CA3224E 920 15 8K 4 Adjust FBT bottom pot for 4 0V to 4 4 at pin 8 BIAS CONTROL LINE 2 200pF 5 2 200pF ox 815 X P 6 80 110VDC CERONIX 13350 New Airport Road Auburn California 95602 Scale NONE 10 3 96 E 4 Drawn 4 16 96 E11
3. id KES CERONIX XX93 Monitor Part List 47 A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B CPA4235 1493 CGA H CPA4250 1793 SVGA CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA CPA4232 1493 SVGA J CPA4255 1993 VGA CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA W ISO XFR 100W F L CPA4244 1793 VGA CPA4256 1993 SVGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description 081 CPC1032 B3 BB4 O1uF 4 50V Film 081 CPC1036 B3 BB4 047uF 45 50V Film 081 CPC1040 B3 BB4 015uF 10 250V Film 081 CPC1054 B3 BB4 039uF 5 100V Film 082 CPC10411B3 LL6 33uF 45 5OV Film os3 cPRoosO C3 on umperWire 084 CPD1250 C3 AA5 100mA 200V Diode FDH400 085 CPR0155 C3 DD1 68 1K 2 1 1 4W MF 086 CPD1250 C3 AA5 100mA 200V Diode FDH400 087 cPROIS7 C3 DD2 127KO x96 UAW MF 088 CPROOS0 C3 BB1 OO JumperWire oss CPRO100 C3 2 2KO 25 14W CC 089 1102 3 02 100uF 25V Electrolytic 090 CPD1252 C3 DD1 1A Diode INA007 092 CPROOS0 C3 PPO OQJumperWire o92 cPROS7S C3 PPO 680 5596 IW MO L092A CPROOS0 C3 PPO 00 Jumper
4. 64 5 6V to 1 1V Analog DC Video Interface Circuit 2020 2 2 65 OV to 7V 4Analog DC Video Interface Circuit 66 1Vp p Analog AC Video Interface Circuit 67 TABLE OF CONTENTS Video Amplifier Circuit Function 68 Video Amplifier Circuit Description and 5 1 68 69 Video Board Power Supply and Arc Protect 70 CRT Auto Bias and Auto Bright Circuit Function 71 CRT Auto Bias Auto Bright and Vertical Sync Delay Circuit Descri ption 72 CRT Auto Bias and Auto Bright 5 73 Monitor Block Diagram 74 Blanking Master Gain and Fault Circuit Function Description 75 Blanking Master Gain and Fault Circuit 76 Blanking Master Gain Beam Limiter and Fault 71 Vertical and Horizontal Sync Circuit 0 78
5. P L K GREEN RED i T 00 808 AAA At 00 936 3 1 P A 00 802 T arae oe WS 922 924 926 935 934 1UF bo 937 1 3 amp 1uF amp 067933 1 8K 467 2 US lt di 1234567 891011 sur 4 6 Aj 14 13 12 11 10 9 8 A 2907 5 2 928 930 P 8 33K 911 tur e 7 9 33K 910 907 z 10 22 21 20 19 18 17 16 15 14 13 12 9 11 09 204 906 14007 EN EN LENE 0 2 1N4007 CH En IL 7 894 892 5 8 28 BLUE 1500 CC amp 882 5W 180 879 9 m 3 N ox 00 eg 093 5 ze Pin Wine PEB 800 9 1500 CC AC 875 5W 700 865 873 5W 100K 876 CERONIX 4 18K 874 Model XX93 E7 Video Board t P L K 123456 7 8 9101112 M Do C i 23523 3 28553 2 Note Common part values marked on drawing LI 5 y 5 70 us 5 282 values for components marked with E B 2 lt 2 the A delta can be found the master 5 part list starting page 45 Safety Critical Components for XX93 Monitors PRODUCT SAFETY NOTE Components marked by the symbol have special characteristics important to safety When replacing any of these components be sure to use the parts specified in the parts list An example of how the critical components
6. Note The T in front of the board numbers refers to this PCB Parts List Addendum Parts List Addendum Parts List Addendum Parts List Addendum
7. 163 LL8 28 0K Q 1 1 4W MF E 044 CPR0015 A3 MM 7 22K 45 1 4W E E B S B B B B Description A K E E p E E 044 CPROO16 A3 MM7 33KO 3596 14W CF 044 CPROOI7 A3 MM7 3 KO 35 UAW CF 044 CPROO18 A3 MM 7 62K O 5 1 4W CF 044 029 7 200 0 35 1 4W 044 148 A3 MM 7 24 3K O 1 1 4W 044 CPROI48 A3MM7 24 3KO 1 MF Josa cPROIS4 A3 MM7 442KO 31 MF 044 CPRO163 A3 MM 7 28 0K 1 1 4W MF 045 CPRO144 A3 LL8 12 1KQ 1 1 4W MF 045 CPROIA4 A3 LL8 121KO 1 LAW MF 047 CPC1032 B3 O1uF 35 50V Film 047 10321 3 MM8 OluF 596 5OV Film Joss 50 3 On umperWire 049 1414 B3MM8 OP Amp Comp IC LM392 050 CPR0024 B3 3 3KQ 5 1 4W CF 050 CPROO24 B3 NN6 33KO 5 1 4W CE 051 CPRO143 B2 nN5 10 0Ko 1 14W ME 052 CPR0024 B2 NN7 3 3KQ 45 1 4W CF 052 0138 2 NN 7 2 15KQ 1 1 4W MF 052 CPRO138 B2 NN7 2 15KO 1 MF 052 CPR0140 B2 NN7 3 92Ko 31 14w 052 0148 2 NN 7 24 3KQ 1 1 4W MF 052 CPRO148 B2 7 052 CPRO153 B2 NN7 20 0Ko 31 1 4W MF 053 CPROO24 B3 NN6 3 3KO 45 1 4W CE 054 CPC1032 B3 MM 7 01uF 5 50V Film 054 CpC1032 B3 MM7 OluF 25 50 Film 055 CPRO143 B3 8 10 0K 2 1 1 4W MF 056 CPROOI3 B3 NN8 6 8Ko 35 4 4
8. Blocks 12 Horizontal Size amp Power BlOCKS O oos A 13 P S Safety Shutdown Circuits Degaussing Blocks 14 Monitor BLOCK DIAGRAM aaa as 15 Monitor Schematics and Assembly Drawings 2 93 CGA Main Board 5 4104 32 2 93 CGA Main Board Technician Assembly 33 2 93 V GA Main Board 5 4231 34 2793 VGA Main Board Technician Assembly Drawing eee 35 2 93 V GA Main Board 5 425 36 2 93 VGA Main Board Technician Assembly 37 Video Board 40 Video Board Technician Assembly Drawing Component Side 41 Video Board Technician Assembly Drawing Conductor Side 42 Safety Critical Components for XX93 Monitors English eere 43 Safety Critical Components for XX93 44 Replacement Part ib T E 45 63 Detailed Circuit Description Video Interface Circuit Function Description amp
9. 76 67 1 1 20 5 IW MO 435 01252 67 IKV Diode 194007 436 CPD1272 H7 7 6 IKV Fast D 605 1437 CPC1034 H7 PP7 022uF 33 630V Film 11437 1047 7 PP7 027uF 3 800V Film 437 CPC1076 H 7 0 1uF 2596 200V Film 1438 1264 6 2 600V Fast D FR205 F 439 CPC1034 H7 PP7 022uF 35 630V Film 1439 1047 7 PP7 027uF 43 800V Film 440 CPD1259 H6 PP6 Fast Diode TF307 _ 440 CPD1264 G6 2 600V Fast D FR205 F 440 CPD1270 H6 6 800V Fast Diode 606_ 1440 CPD1270 H6 PP6 800V Fast Diode TF606 1440 cPD1271 H8 PP6 1 Fast Diode 607 440 CPD1271 H6 PP6 6 IKV Fast Diode TF607 _ CPC1030 H6 PP6 Olur 23 1 6KV Film 441 CPC1051 H6 PP6 012uF 3 1 6KV Film 1 441 CPC1055 H6 PP6 8 200pF 23 1 6KV Film 441 CPC1057 H6 PP6 1 000pF 13 1 6KV Film 1 441 CPC1061 H6 PP6 7 500pF 13 1 6KV Film 441 CPC1063 H6 PP6 5 600pF 3 1 6KV Film ID 1 441 CPC1065 H6 6 800pF 5 1ekv Fim 1 441 1075 6 PP6 033uF 3 800V Film 1 441 1077 6 1 500 23 1 6KV Film 442 1030 6 PP6 OluF 3 L6KV Film 1442 CPC1047 H6 27 3396 800V Film 1442 CPC1051 H6 PP6 12 000pF 3396 1 6KV Film 1442
10. ISOLIERENDEN Isolierenden Transformator verdrahtet f r Anmerkung XFR75W oder XFR100W Ausgabe Ausgabe hat f r 120VAC 240VAC verdrahtet Erden Anmerkung Beim Benutzen dieser Isolierung Versorgung von Monitoren dem Bearbeiten zu ist es wichtig irgendeinen Widerstand zu haben 10 Meg oder kleiner zu erden Ein Isoliermonitor der an eine Isolierenergie kann angleschlossen wird eine hohe statische Spannung supply erreichen Wenn diese Spannung Entladungen durch das XFR75W oder den XFR100W Steuerstromkreis der FET im Steuerstromkreis besch digt werden k nnen 125 ISO XFR 75W ISO XFR 100W Schematic Manual Voltage Select shield YEL GRN 3A Fuse Brown CPR0425 120 or 240VAC 50 60Hz input YEL WHITE ibd Swick 120VAC Shown In 240VAC 02 Isolation output to monitor Input Mode Transformer WHT OPTIONAL WIRING YEL WHITE 240VAC output to monitor BLACK ISO XFR 75W ISO XFR 100W Assembly Drawing QRED OYEL Q _ PCB 500 White OYEL OGRN CAUTION Output 2 REPLACE WITH SAME TYPE FUSE AND ORG RATING ATTENTION UTILIZER UN FUSIBLE O O DE RECHANGE DE MEME TYPE ET CALIBRE Black OPLU lt GRY Connect ORG to RED for au OBRN Blue Oln ut 230VAC output CL 509 gA B 7 DPDT Switch
11. 1 200V NPN 25 3467 Bfc p 421 6 2390 5 zw MO ale ole 422 CPROO5O0 F5 KK1 02 Jumper A B C lo e F IK IL sn re va IA epp Febr T 424 0004 5 2700 5 CF Ic ole F 425 CPRO367 F5 1500 5 1 2W CF Ic ole o 425 CPRO379 F5 680 5 IW MO 426 002 Cel IS 426 OO2 062 Dia BeadPin YC1 A B C D A B Ic p e F IK L A B Ic D e Ir IK L AB Ic D e F u IK L Pera kt EI EI EI 1 EI E EI E E CERONIX XX93 Monitor Part List 56 A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B CPA4235 1493 CGA H CPA4250 1793 SVGA N CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA CPA4252 1493 SVGA J 4255 1993 VGA P CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA 4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 199
12. 1055 6 8 200 3 1 6KV Film 1442 1057 6 PP6 1 000pF 13 1 6KV Film 1442 1061 6 7 500pF 13 1 6KV Film 443 1042 68uF 35 250V Film PPrPFPPPPFPFPFFPRPFPPPPPFPFPFPPPEFPFPPPPPFPPPPPEPPPFPEPFIFFPPFEPPFPI 2212222212122 stl san 1911F S1919 91991918 S 9 S SEI d E m Ell EET eese eee m 0D IN Co BR Co Co Co NO CD Co Co O O O O ID IP O O NINIOININ OINININIO OINJOIOJOIOJOJO gt 01 J H O NR BRIO do 00 00 OO CO NIN AN IB OISI IRI JOO BR CERONIX XX93 Monitor Part List 57 A CPA4233 1493 CGA G CPA4247 1793 SVGA M CPA4112 2093 CGA S CPA4231 2793 VGA 4235 1493 CGA H CPA4250 1793 SVGA CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA D CPA4232 1493 SVGA J CPA4255 1993 VGA CPA4227 2093 VGA V ISO XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description IJK LM ac 11443 1050 6 PP7 47UF 3596 250V Film 1056 6 PP7 39uF 5 250V Film
13. Es come C2 NN 7 Varsti nae incon Range 8 E x u s a E E 4249 1993 SVGA gt CPA4256 1993 SVGA Solder Conn der Conn M Gain Limit Adjustment mtns C ISO XFR PCB 062 CEM 1 Vertical Frequency Adj LL EI LLL LE LL TE LL Rb EL EL EL SU RK E LK TD KK A E I Ld eer EE OKK a KR KK KIT E KD JI 1KV Diode 1N 4007 2 CPD1267 CPR0016 CPR017 TZL 200B 200V 5 5W Z 33KQ 5 1 4W CF 365K 1 1 4W MF 1 CPR0425 CPR0431 CPC1037 CPRO157 CPD1252 CPD1252 CPC1069 CPC1110 CPD1257 CPD1269 1011 CPR0436 53 3V to 54 7V 3 Amp Slow Blow Fuse ISO XFR 100W Housing CPT1553 100W Isolation Transformer 51830 input Power Cable 51762 OutputPowerCable x 2517 Grommet D 250VAC 60 0 145A R Fuse 1A 1KV Diode 1N 4007 IC T502CPD125 T510 D6 HH2 cej NEN wa E o Cr CPROOSO 09 JumperWire Eu MEN E Er LL E EL MEN EEE ze aa E NEN TFT S RS o EP RP E PR VIDEO INTERFACE
14. KK6 1 000uF 35V Electrolytic 388 0019 4 2 100 02 35 UAW CF 388 0029 4 2 200 1 1 4W 388 CPROIS7 F4 HH2 127KO 21 14W MF 389 CpR0050 E4 2 00 Jumper Wire CS 74 1350 0019 4 11 100KO 35 10407 CF 390 CPRO157 F4 111 127 1 1 4W MF sei cPCioa3 FS HH2 lur 5 50 Film 391 ICPC1101 F5 HH2 10uF 50V Electrolytic 392 CPROO11 F5 HH1 1 8KQ 5 1 4W CF 1392 CPROOI2 F5 HH1 2KQ 25 CF 1352 cPRoise FS 111 2 1560 1 14W ME 392 CPROI41 F5 HH1 442KO 31 Vw ME 353 CPROOSO ES HHI 00 Jumper Wire 393 cpro155 d E 393 CPRO158 E5 1 84 5 31 LAW MF 394 CPR0364 E5 1000 45 1 2W CF K L Ee e ee e r see M E E J K L G a a G H G H i G H E F G H G H LL G H G H Tar HE G H E E GH MEN E ZA E E RN E a aa EN PERERA ye essere CERONIX XX93 Monitor Part List 55 A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B CPA4235 1493 CGA H
15. lool E SINK 1 2 2 Blue Wires i 31750 066 DS en k E 21 18 EL We Lem WA 5 me 2 KS Heg G Sum T d 8 1 A a 1 Ir ANN Ug Pes 12 pin video board connector 1 000uF 1 000uF 075 51757 C 470uF je 35V 070 f DEE 470 T 2028 a 14 TR e _ 0741 6 50V 380 lt 1 s EA 00 523 a EI N e e X 1 C G a QJ Bo silmad a RI d d d NS H400 2131 d LM393 9 HM e CAAA a aS NIII UB pm _ A AAA ETE E gt a 09 218 o mimm 377 LA7838 135100 33097 gt Y EOD Nm 11 in 5 6 3 92K 223 lt 44 42K 242 127K 390 nas e T n I 2241 5 LERE M men J A ah AIN co O1uF 374 coo 700 508 714007 225 T 3 lt N 3 E 18870228 Send tia is 2222 hee Lg 25 1222 BET ND RIS S BL amp 200K 372 193 1 4031 a e SR NI 3 4 42K 231 c IQ 4148 405 al 447 N I 5 A 2 a 22K 370 2907 4148 406 e a FBT 453 1050 2321 em e PIE LBK 3687 Na sek 4074 2 Meritron CT 8227 CPT1544 44007 2337 v me x 180 36
16. 057 1027 3 NN8 6 800pF 5 100V Film 057 CPC1035 B3 NN8 3 300pF 5 100V Film 058 0154 3 44 2K 1 1 4W MF 058 CPROI54 B3MM8 44 2KO 1 MF 060 CPROOI2 BS NN8 27KQ 35 061 1102 LL8 100 25V Electrolytic 061 1102 3 LL8 100uF 25 Electrolytic 062 09 EES IKO 35 1 4W CF 062 CPRO138 A3 2 15 0 21 LAW MF 063 CPROOO2 A3 5 180 25 UAW CF 064 CPR0012 A3 BB5 2 7KQ 5 1 4W CF 064 CPR0024 A3 5 3 3 5 1 4W CF 064 CPROI26 A3 5 9090 1 1 4 065 09 6 1 0 35 14 cr 066 0124 EE6 75 00 1 1 4W MF 067 050 44 00 Jumper 068 0050 4 J 00 071 CPQ1322 B3 307 6 NPN PN2222A Motorola 072 01322 3 4 30 64 PN2222A Motorola o76 cPROI32 B4 CCS 6040 1 JAW MF 076 CPRO136 B4 5 1 62 0 1 LAW MF 077 CPR0163 B3 BB4 28 0K 2 1 1 AW MF 077 0016 3 BB4 33KO 59 14W CF o78 cPROOL1 B3 4 1 8 0 25 CF 078 CPR0012 B3 BB4 2 Ko 5 UAW CF 078 CPR0136 B3 BB4 1 62K 2 1 1 4W MF errors IK Toso 882 TA 600V Fast D 18487 081 4 6800pf 45 100V Film E ES E E E E NN ne BE EN Ed d d E E E d
17. 023 CPR0143 C2 MM4 10 0K O 1 1 4W MF 026 CPC1102 C2 NNA 100uF 25V Electrolytic 027 CpR0006 C2 CC2 5100 5 1 AW CF 029 CPRO143 C2 MM5 10 0KQ 21 14W 030 CPRO142 C2 NN7 7 15K 2 1 1 4W MF CPRO44 C2 NN7 121KO 21 14W MF 0145 2 NN7 15 8 319 14W 030 CPR0153 C2 NN7 20 0K 2 1 1 4W MF 030 CPRO163 C2 7 28 0 0 319 Vw MF 030 CPRO411 C2 NN7 10K 220 1 5W White Pot F os2 cPRooso ca J 00 Wire 033 11405 B2 MM Quad OP Amp IC LM324 ceRoas ez a zika s Taw MF lalele lotel leth 035 cPC1102 C1 NN4 100uF 25V Electrolytic fa B o oe F G H 036 CPo1502 a2 30v 3A PNP b 5 64 5 c o e 6 er a or cemousp wwdissosm van F jer 038 0143 2 6 10 0 21 14W MF 040 CPR0029 A2 200K O 5 1 4W CF o41 cPROl41 A2 NN7 442KQ 21 14W MF 041 CPROI44 A2 NN7 121KQ 31 Vw MF 041 0145 A2 NN7 15 8KQ 21 14W MF 041 CPRO153 A2 NN7 20 0K 2 1 1 4W MF cp NN 1111 041 ceRo163 A2 NN7 28 0Ko 21 IW MF 041 CPR0411 A2 NN7 10K 22096 1 5W White Pot 042 CPROOI3 B2 7 6 8 35 CF o42 cPRoo24 B2 NN7 33Ko 25 042 CPRO138 B2 NN7 2 15KQ 21 14W MF ora eenmuo ea un7 Ko V ur 022 NN E 043 TT LL8
18. 1 ee T ID 298 1071 bw po a 306 C4159 l ZU 475 1 MI 1t 50uH IN T i Lo de r Q 7 ax tes 337 eee an 5 u nn t S xS EIE E H Drive ELTI 1 0K SW 02 480 gt 1569 CPT1511 E ED dua am SE Bee B CPT1505 a Be y ait Sy OH Be ERES 332 1000 2w 1 20 434 ra 478 7812 296 S 310 Se SY m 2 7 22 000 630 lt 3 057 2 ww pi 9 pup pup p E vi 2 79 14007 435 439 457 00 295 i lt ST ATSI Hf 31 5kHz Vf 60Hz 3 m J NOTES VALUE PART No CRT A68QCP891 X002 CPP1728 BD SCH Vf V 126 128V DC 127V DC Hf 31 5kHz vf 60Hz 60Hz Video Board Video Positive Analog Power 220VAC CPA4266 0 00 0 70V CPA4254
19. 110 0K 023 lt E 5 3 3nF 10K 038 Wk 6 x 125 J s 2 v 040 V AS S s under 5 SE Ve l m J A Oo i PR cm m N AN 200pF Retighten nut after heat sink m x N m N 1 0315 2 e Bu 123 wave soldering e d E lt 00 2 1 MII 0287489 B 4 MIL ar j 715 030 kA Kia ws LTT OAS 14937 122 CPM2038 135 1 6 2 1039 uS p 25 0 0K 051 10 0K 029 O E 4987 121 i 4937 170 62K 167A 414 3 92 042 PERD RA A m EIA 042 IKEA TREND pe NNNM 14937 169 8 A33K 043459 1 3 3 050 3 083 28 0K 097 a 9 E 71 5 JE a RE RE HBK 044 Pi Mg schichte 1 000uF mg 14937 167 TA 12 1K 045 049 10K 055 Es 10 0K 095 l o Ar oe 68 0561 8 ee CPC1103 k RUE NNNM NM Sr 1 si i 171 Zr ve te BE EO s Ji oa 3 442K 058 n a ed gt ER POSISTOR 02 048 100u i 09 leg A 12 15K 062 061 2 7 060 100uF CPRO0434 gt 33uF co 1 N 2 a 9092 064 2222 Mot 4937 080 ga is N die A Gi ci A NES 158 40241000410 1752 066 FSK 77 el S e tE A n 8 _ T 5d Dep ER P N 206 12 pin video board connector WINES l
20. 6 AA7 2700 5 yaw CF 278 CPR0124 B6 AA7 75 00 31 1 4W MF 278 CPRo128 Be A47 3010 21 1 4W MF l 280 CPC1041 Be 8 33 35 50V Film 280 CPR0050 B6 BB8 02 Jumper Wire 281 cPCio41 Be AAB 33ur 35 50V Film 281 CPR0050 B6 AA8 00 Jumper Wire 283 1041 6 CC8 33uF 25 50V Film 283 0050 6 CC8 00 Jumper Wire 284 CPRO124 B6 CC9 75 00 1 1 4W MF 284 0128 6 CC9 3010 1 1 4W ME 296 CPRO124 B6 BB9 75 00 31 LAW MF 286 CPRO128 B6 BB9 3010 1 1 4 288 CPRO124 A6 9 75 00 1 1 4W MF 288 CPRO128 A6 AA9 3010 1 1 4W MF 292 CPS1752 A6 889 7 Cond Straight Header 292 51781 6 BB9 6 Cond Straight Header 293 050 46 DDS Jumper Wire 295 CPROOSO A7 EE3 00 Jumper Wire 296 1407 A7 EE3 12V 1A Regulator 7812 297 0050 7 00 Wire 298 CPC1103 A7 220uF 50 Electrolytic 303 1301 7 EE7 60V PNP PN2907A 1304 cPC1102 B7 EE3 100uF 25V Electrolytic 305 CPR0012 B7 EE7 2 7KQ 5 1 4W CF c Abk LLL EM BEE J K IL J K L L JAE EOE ESA A E AA AEA EAA AE ANS EN ER EL NI n E s OI A ie E KE De KI es pe bl Feist E E E E u E
21. 60950 00 ANSI UL 60950 CAN CSA C22 2 No 1 98 EC 65 85 A1 87 A2 89 A3 92 ISO 9001 1994 certified through T V Management Service COPYRIGHT 2002 CERONIX All rights reserved The information contained in this manual is subject to change without prior notice ABOUT THIS MANUAL This manual is specifically written to aid the service technician repairing CERONIX Models 1493 1793 1993 2093 2793 and 3693 color monitors There are three main sections l General Description 2 Circuit Description 3 Repair Setup and Appendix Introduction Block BLOCK ne Circuit Trouble Di Diagram ipti i Diagram 9 Assembly Description shooting Drawings Handbook Installation Description Instructions To understand how the Monitor works it is best to know what each circuit does and how each circuit relates to the other circuits The Block Diagram is presented in a simplified view and a comprehensive view to accomplish the goal of understanding the whole unit Oncethe general picture is clear the complexity of each circuit will be easier to understand The Circuit Description is also written in two views a simplified view and a detailed view to help give the reader a clear understanding of what each component does This understanding is most helpful for the more complex problems or multiple problems that sometimes occur The power supply trouble shooting section describes methods used to power up various monitor ci
22. Installationsanweisungen 1 Stellen Sie die Einheit auf einer geerdeten flachen Metalloberflache Gebrauch wenigstens zwei Schrauben auf Anmerkung Die Oberflache soll L6cher gr Ber als 0 2 in Durchmesser nicht haben 2 Verbinden Sie das haupt ac Spannung Kabel zum Molex Verbinder auf der Transformator 3 Verbinden Sie das Ausgangskabel vom Transformator zur Kraft Verbinder des Monitors INSTALLATION ofthe ISO XFR 75W ISO XFR 100W ISOLATION TRANSFORMERS Connector Line or neutral s OR Line Mains power ba Preferred orientation for optimum cooling The ISO XFR 75W 100W MUST be grounded by mounting on a grounded conductive surface via at least two screws WARNING Mains power and ground connections must be made before power is applied to the ISO XFR 75W or the ISO XFR 100W Isolation Transformers WARNING FOR CONTINUED SAFETY REPLACE SAFETY CRITICAL COMPONENTS ONLY WITH MANUFACTURER S RECOMMENDED PARTS REFER TO SERVICE LITERATURE AVIS POUR MAINTENIR LE DEGRE DE SECURITE DE L APPAREIL NE REMPLACER LES COMPOSANTS DONT LE FONCTIONNEMENT EST CRITIQUE POUR LA SECURITE QUE PAR DES PIECES RECOMMANDEES PAR LA FABRICANT CONSULTER LE GUIDE DE DEPANNAGE INSTALLATION Isolierung Transformator des XFR75W und des XFR100W Wechselstromzeile Stecker oder neutrales WechselstromZeile Hauptlinie Spannung E bi Lagebestimmung Prefered f r das optima
23. SIMPLIFIED GAIN CONTROL CIRCUIT GAIN SELECT 12V RESISTORS MASTER GAIN 485 062 HORIZONTAL BLANKING PN2222 FLYBACK PULSE SIGNAL 56Vpp 62 06 CONDITIONING BIASACTIVE VERTICAL BLANKING 2 5V 6 3 1N 4148 Vertical Bias O S 1 5 42 5V 2 ZI Blanking in this monitor is accomplished by reducing the video gain to zero during the vertical and horizontal blank time During video time the gain is set by the master gain control which is located on the remote control PCB Ifthe overall beam current exceeds 5 or 1 5mA depending on model for more then ten frames the beam current limiter circuit will reduce the video gain to protect the FBT A high temperature sensor dosetothe FBT will also reduce the beam current if the high temperature limit 70 C is exceeded The fault circuit senses the temperature or beam current line and will turn off the monitor if either of these signals exceeds the beam current shut off value f an abnormal condition exists in the monitor or the cooling system of the enclosure fails the high temperature sensor will activate the fault circuit at 80 C The fault circuit is also turned on when the beam current becomes large enough to damage the FBT This condition will happen if the video bias supply V 9V on the video board fails An OP Amp is used to sense the fault condition and a transistor is used to transmit the fault signal down to the power
24. a 240VAC 120VAC a Output 50 or 60 Hz 120VAC Relay Control Stromkreis Beschreibung Input Die Sicherung sch tzt die Hauptleitungen Leitungen und das Steuer cPwb Der Leistungstranformator hat zwei interne 2 Ampere temperaturempfindliche Sicherungen Jede Prim rh lfte hat ein das in der angeschlossenen Serie aufgebaut wird fixieren Eine r ckstellbare Sicherung wird an das Relaistreiber Versorgungsteil angeschlossen Diese Sicherung sch tzt den Relaissteuerstromkreis vor guadratischem Welle Input der auftreten w rde wenn ein Inverter als Energiequelle benutzt wird Kondensator gibt Strom von der Zeile an Kondensator durch Diode an die das Relaissteuer Versorgungsteil bildet Kondensator Ladungen der Diode w hrend des negativen gehenden Teils der Zeile Welle Vor bergehender Spannung Entst rer regelt das 24V Versorgungsteil und sch tzt die Relaisspule vor der berhitzung Das MosFet schlieBt aus dem 24 Volts Versorgungsteil kurz wenn die Inputzeile Spannung 240VAG ist Die Inputzeile Spannung an der das MosFet einsch lt wird durch das MosFet einschalten Spannung eingestellt ber 4v Die Spannung f llt ber Widerst nde und die zenerdiode 503 154 VAC ist die ungef hre Zeile Spannung an der das Relais sch lt Kondensator 1508 und Diode halten das MosFet eingeschalten damit die komplette Wechselstromschleife den Kr uselungstrom in den Begrenzungen Kondensatort T513 Resistor der Spitzenstrom zu
25. ise oy du systeme pour les details de montage del cran dans le carter 4 Relier le fil de terre vert jaune la prise de terre sur le carter Ce cable est reli la vis de terre situ e sur le chassis del cran derri re tiquette portant le num ro de serie ATTENTION Il n est pas permis de ne pas relier ce fil de terre avant de mettre le courant car cette situation pourrait provoquer un choc lectrique dangereux La r sistance du chassis aux pricipales connections ne doit pas depasser 100mQ 5 Verifier que les fils suivants sont correctement reli s A Lefil vert dela tresse du tube cathodique aquadag a la carte video B Lecable plat a 12 conducteurs de la carte vid o a la carte principale C Lecable rouge haut voltage du retout du transformateur au capuchon de anode du tube cathodique Le fit de bobinage du bobinage a la carte principale Le fil de t l commande de la carte de la t l commande la carte principale m uU Note Soyez sur que ces fils sont connect s en toute s curit de sorte qu 115 ne touchent aucune partie m tallique 6 Brancher les gm sept fils dela 5 2 video 12V del cran Blanc Rouge video Synchro Horizontale Jaune Vert vid o Synchro Verticale Violet Bleu vid o TRANSFORMATEUR D ISOLATION 7 Brancher les fils de courant Courant depuis le transformateur d isolation Principaux SC un FUSE 5 Attasch au chassis FIL VERT
26. 1 4W 529 cPRor70 E1 GGe z94ko 21 14W 529 CPRO179 E1 GG6 392K 21 LAW MF F SmA CPROOSO FI J 08 Jumper wire 531 CPROOSOIF1 J OO JumpeWire 532 0050 611 KK7 00 JumperWire 533 CPR0050 G1 KK7 00 J umper Wire 5 450 _ J600 cPB1615 Vertical Amplifier PCB F sor CPQ1314 W4 TIP32A Transistor 602 01313 1 TIP31A Transistor 603 CPQ1313 Wy TIP31A Transistor 604 CPD1264 Wi 2 600 Fast D FR205F 605 CPRO376 WY 120 45 1W MO Teor cprooos v l _ 470 35 IAW CF 608 CPROOO3 V1 4 72 5 1 AW amp 10 CPROS77 Vi 330 35991W MO amp 11 CPDI264 Vi 2A 600V Fast D FR205 F _ 612 1 15 va V DefledionIC LA7838 Te s cps sss v2 Vertical Amp Wiring Cable _ go cemie Le Board 7_ 801 CPC1058 P1 YY2 1uF 5 50V Film jaaa CPR0OSO Pi oa umpa wire 803 CPROS10 P1 RR2 K PRA Video Amplifier Taoa 050 1 J 00 A 805 CPQ1308 P1 554 200V NPN 25 3467 A 806 050 2 J 08 Jumperwire 807 CPROOSO E g O c c OJO 808 CPR0050 02 J umper Wire 810 CPQ1308 N1 551 1 200V NPN 2SC3467AE Seele m 7 m 7 E F G Gag G NN JK JIK BN ais IC 23 A A a G
27. 2793 VGA 3693 CGA Component Isolation Transformer Assembly Models ISOXFR 75W ISOXFR 100W IEC 60950 3rd Edition National Differences AT AU CA DE ES FR GB HU RU US ZA CAS CAN 60950 00 UL 60950 3rd Edition IEC 65 85 A1 87 A2 89 A3 92 5th Edition National Differences KR hereby declare that the equipment named above has been tested and found to comply with the relevant sections of the above referenced Specifications The unit complies with all essential requirements of the standards The dedaration is issued under the sole responsibility of the manufacturer Don Whitaker President 02 February 26 2002 Hf CERONIX Models 150 XFR 75W ISO XFR 100W SAFETY ISOLATING TRANSFORMER Circuit Function Description The basic function of the ISO XFR 75W and ISO XFR 100Wis to isolate the line power for monitors requiring an isolation transformer The transformer is designed to have a low leakage flux value which allows it to be mounted close to the CRT To accomplish the low leakage flux the transformer has two sets of primary and secondary coils mounted on a modified toroid type core The ideal transformer would be a toroid but this type transformer is expensive because it is difficult to wind A relay is used to connect the two primary coils in series or parallel to accommodate 240VAC or 120VAC line voltages Before power is applied the relay connects the transformer primary windings in seri
28. CPA4250 1793 SVGA N CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA CPA4252 1493 SVGA J 4255 1993 VGA P CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA 4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA R CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description E 394 CPR0390 E5 NN3 479 5 2W MO_ _ E F 394 CPROG97 ES NN3 330 259 2W MO 395 CPROOSOJES 111 00 Jumper Wire 396 CPRO003 E5 JJ 1 4 70 3596 1 4W CF 397 1037 5 JJ 1 1uF 35 250V Film 398 CPC1009 E4 111 100pF 10 500V Ceramic 399 CPC1058 D4 LLO 1uF 5 50V Film aoo cPRooso E4 J O0n umpe Wire 401 1043 5 HH1 luF 35 5OV Film 402 0017 5 661 36 35 uaw MF 402 CPR0163 E5 661 28 0 1 1 4W MF 402 0154 5 661 44 2 31 LAW MF 403 CPROO19 E5 GG2 100KQ 45 1 AW CF 203 jeproissjes GG2 68 IKa 31 vaw m 403 CPRO156 E5 GG2 93 1K 2 1 1 4W MF 403 CPROIS7 ES GG2 127KO 1 yaw MF 404 CPROOI9 ES KK1 100Ko 35 14w 404 CPRO146 E5 1 169K 0 1 1 4W 404 CPROI58 ES KK1 36KO 45 1 4W CF CPROIS6 ES KK1 93 1KO 1 me 404 CPROIS7 E5 KK1 127Ko 31 LAW ME 4
29. TT TT 106 140 02 GG8 392K 0 21 14W ME D2 668 8 HH 73 EIER CPA4104 2793 CGA IJK LM j e s T em U BE Ka Ki a ee EEE ES EN ESL js rig ss esie Ie E EN KAIN IR LALA m EL A ALA epe SS SEE ps ALA AIA m JME CEES Et a pectet TF 106 CPRo168 207 cpc1000 D2 108 jepcios5 p2 208 ceno 2 110 cec1oo5 pa HH6 1 000p 10 500v Ceramic s cenosot 1 st E 112 CPQ1310 D1 HH6 TA 300V PNP 25A1371AE U E CERONIX XX93 Monitor Part List 48 A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B CPA4235 1493 CGA H CPA4250 1793 SVGA N CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA CPA4252 1493 SVGA J 4255 1993 VGA P CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993
30. u E E u E E 3 E W M E M M E M M M E M M 1E E L M N L M N TT A B Ic D e Ir J K L MIN jo P A B c D JE fK L jo P jolojolojolo jot Jele jo oo o Jol Io x A B Ic D Je fE J IK L o fP Ja e E e E y K E 502 CPROOSO G4 NN5 00 Jumper Wire PTE Ett 503 CPR0017 G4 004 36K 5 1 4W MF ler MIN oP a r Al Ic MIN jo jP fajr Al Ic MIN o P a r ELLE IE 111 EENE JK KKK A AE Ka E KD EE KK E E COR CER ER E KA A EDT EI AL E A A A E KK EI CERONIX XX93 Monitor Part List 58 A CPA4233 1493 CGA G CPA4247 1793 SVGA M CPA4112 2093 CGA S CPA4231 2793 VGA 4235 1493 CGA H CPA4250 1793 SVGA N CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA O CPA4224 2093 VGA U CPA4172 3693 CGA D CPA4232 1493 SVGA J CPA4255 1993 VGA CPA4227 2093 VGA V ISO XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description
31. 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA D CPA4232 1493 SVGA J CPA4255 1993 VGA CPA4227 2093 VGA V ISO XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description A GH IJKLM TUVWX Com PRICE 270 CPD1251 B6 887 14148 Diode Reverse Polarity 271 CPD1251 B6 AA7 1N4148 Diode Reverse Polarity 271 cPD1251 B6 AA7 10mA 75V Diode IN4148 272 CPC1026 C6 007 1 000pF 45 100V Film 272 CPROISS CS DD7 215KQ 21 272 cPROI40 CS DD7 3920 31 14w MF 273 CPR0130 C6 008 4120 1 1 AW MF 273 CPR0136 C6 DD8 1 62K 2 196 1 4W MF 273 cPRO147 Ce DD8 1 00MQ 21 14W MF 273 cPROI38 Ce Dos 215ka 1 140 274 CPQ1303 c6 DD7 30v 6 NPN PN2222A 275 CPRooos ce DDs 1Ko 5 1 CF 275 033 6 DD8 300 596 IAW CF 275 CPRO122 C6 0811050 21 JAW MF 275 CPR0143 C6 DD8 10 0K 2 1 1 4W MF 276 04 6 7 2700 35 LAW CF 276 0124 6 7 75 00 31 UAW MF 276 CPR0128 B6 CC7 3010 1 1 4W MF 277 CPR0004 B6 BB7 2700 5 1 AW CF 277 cPROI24 B6 BB7 75 00 31 1 4W me 277 cPRoi28 Be 7 3010 31 277 CPR0129 B6 7 3400 1 1 4W 278 0004
32. 43 CB 07 6 115A 11180 133 F AR Vi AC au gu dn Ls 22 E 7 77 Do LO 531 LR Y z 330uF 250V comm er amp Power Supply Control 144 145 A W 1371 007ff 4148 006 J pply Co 62K 011 E X 008 e SD a 1 00 134 N patti a Nr DIK 012 Io 019 n ra 6 EN tra erg S SS 1 I 156 5 gt A o n sl X 15 8K 020 21 1 0110250 6 Lise ah a g J 5100 021 S N OR 8 FUSE 324 10 0 022 x bg 146 15 8K 037 10 0K 023 SONGS GE SEINE le 10K 038 033 00 032 ANL 8 30 115 Narr 136A Jumper lt Ap 1 i under 7 200 040 026 5184 S X 200pF Retighten nut after heat sink 330uF 250V fi 5100 123 wave soldering d 163 2 144 10 gt 14897 122 la 14937 170 09 167 zs 100uF 4937 12111 UE Tr JA ae O uw gt al 62K 043 3 3K 050 3 3K 053 58 0K 097 gt 4537 168 62 044 LMaoo COE 054 58 0K 096 d 1 000uF Ces No E 12 1K 045 049 10K 055 3 10 0K 095 OlLF 047 6 8K LAN C g 171 i NIE ED AY 8 3 057 51 Ek N POSISTOR 09 048 7400 E OSH ALTE 8 CPR0434 2 15 0621 06 2 K 060 meets 9 kala IQ 120 230V 140 18
33. Eguipment setup for trouble shooting the ISO XFR 75W ISO XFR 100W Isolation Transformers SAFETY FIRST Use only one hand when working on a powered up ISO XFR 75W ISO XFR 100W to avoid electrical shock Alwavs wear safety alasses when workin on powered up electronic equipment Mains Power VARIABLE 2 Fuse Ground uM o ISOLATION gt lt transformer wired A for 240VAC output TRANSFORMER Note ISO XFR 75W ISO XFR_100W output wired for 120VAC 0000 Ground Note When using this isolation supply for working on monitors it is important to have some resistance 10MQ or less to ground An insulated monitor connected to a insulated power supply may attain a high static voltage When this voltage discharges through the ISO XFR 75W ISO XFR 100W control circuit the FET in the control circuit may be damaged Vorrichtungen haben zum L sen von Problemen mit dem 75W und dem 100W Isolierung Transformatoren benutzt SICHERHEIT ZUERST Um elektrischen Shock zu vermeiden benutzen Sie nur eine Hand beim Arbeiten auf einem angeschaltenen Transformator 75W oder 100W Tragen Sie immer Sicherheitsal ser beim Arbeiten auf angeschaltener elektronischer Ausr stung Hauptlinie Spannung VARIABLER 2 Fuse Erden TRANSFORMATOR a
34. Electrolytic 163 1111112 GG8 220uF 250V Electrolytic 164 0050 2 J 02 Jumper wire 165 0050 2 J 00 165 0050 2 00 wire 166 1536 2 KK7 XX93S M Power Inductor 1 166 1552 2 KK6 xx93 5 M Power Indutor 166 CPT1559 H2 KK6 1793 5 M Power Inductor 1 166 1562 2 KK 6 14719935 M Power Inductor 166 1563 2 KK6 XX93S M Power Inductor _ 1 166 cer1567 2 kke xx93 S M Power inductor 167 CPD1253 G3 JJ 6 11 600V Fast D 1N4937 167A CPR0018 H2 114 62KQ 5 1 4W CF I67A CPROOSO H2 114 00 Jumper Wire 168 cPD1253 G3 KKe 1A 600V Fast D 184937 169 CPD1253 G2 KK5 1A 600V Fast D 1N4937 170 01253 92 KK 1A 600v Fast D 1 4937 171 CPC1104 F3 JJ 6 LOO0uF 35V Electrolytic ma cRooso r3 J 00 172 0050 63 J 00 umper 173 0019 63 4 100 02 35 14W CF 175 1107 3 116 330uF 250V Electrolytic 1 175 CPC1111 H3 116 2200 250V Electrolytic 176 CPROOSO H4 LL9 00 Jumper Wire 177 0050 4 LL9 02 Jumper wire A 178 CPROOSO H4 J 09 Jumper Wire 180 cPRo422 64 GG6 100Ko amp 5 C Thermistor 181 CPD1256 G3 HH6 3W 160V Zener BZT03 D160 182 cPc1103 63 1 5 220 50 Electrolytic 182
35. K Film pin 1is 10V and Ohm gain resistors at pins if OK ms If voltage K Film pin 1 over 10 6V 1f pin 1 over 10 6V replace K F ilm Desolder pin 1 Make open to trace If pin 1is 10V replacethe diode of Color may be tested by connecting a dip missing color 213 086 amp 084 Pins listed in table arein lead to GND and a 1 62 resistor a order A Contact theresistor to K Filmpin 1 If still missing color replace IC 241 and Blue If voltage K Film pin 20 different Resistance between these two than voltage at CRT socket pin points should not exceed 1 1K Tests should 6 If voltage K Film pin 20 is First replace for shorted arc preformed in order over 115V suppression diodes of affected color to reduce chance of Arc Red Then try replacing the K F ilm replacing wrong suppression Green If not solution change the component di odes Blue transistors in the amplifier Probable Solution Turn down M Gain If pin 1 still different Excessive Measure voltage of K Film pin 1 replace K Film color for each color If affected color a has 3V differencethen others a 1 voltage same as others G2 bottom Desolder pin 1 Makeopentotrace P ace 2411 pot of FBT Measure voltage across cap 846 If this voltage is less than 5V if excessive check filament pulse If OK ge n gt replace capacitor right i Turn up M Gain Refer tothe Measure volta
36. u ES E G B E G H F G H E E G H E G H G H m G H E G H EER Bp DOO 307 cPRoo04 B7 cce 2700 35 uw cr II III 308 0004 7 BB8 2700 55 1 AW CE 309 1036 6 EE8 047uF 5 50V Film 310 CPRO004 B7 BB8 2700 55 1 4W CF 311 CPQ1303 B6 AA8 30v 6A NPN PN2222A 312 1303 6 BB8 30V 6A NPN PN2222A 13 CPQ1303 ce CC8 30V 6A NPN PN2222A 314 0050 JEE 2700 35 Law 316 EE7 100pF 310 500V Ceramic 1 05 KA exem e eo ode sm seo gem B ELS au T EM EE EE ul u T BE mu mu T Em mu u mu A EN EIS mu lu lu u u u mu mu u lu CERONIX XX93 Monitor Part List 53 1340 CPR0391 F7 LL1 2002 5 2W EOC JEPRO36SJETI LLO ER 45 ACE 341 CPR0368 F 7 LL1 2 2KQ 5 1 2W CF sa ceRoszi F7 LLo iko 25 Tew CF 77 xf EIS IER A B Ic p fe J IK L MIN Ab Die Ir SH KL MN 1342 CPD1252 F6 LL1 1A IKV Diode 14007 343 1003 F6 MM112 200pF 20 1KV Ceramic Jaaa 1100 6 1 SOV Eledrolytic 11345 CPC1027 E6 JJ 4 6 800pF 5 100V F
37. 1 5 180V NPN 2SC4159E e cecuozE7 tci 25v Eleeravie ole Eie fH T TT a 338 1103 7 LL1 220uF 50V Electrolytic 310 TEES M Q Q Q Q E Q Q SEE eee eee E EIER E A ES CORE A E EE CERONIX XX93 Monitor Part List 54 A CPA4233 1493 CGA G CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA 4235 1493 CGA H CPA4250 1793 SVGA 4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA O CPA4224 2093 VGA U CPA4172 3693 CGA D CPA4232 1493 SVGA J CPA4255 1993 VGA P CPA4227 2093 VGA V ISO XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description A GH IJKLM TU V WX Com PRICE 360 CPRO153 C6 666 20 0 0 1 MF _ 1361 157 6 2 127 0 1 UAW MF 2 362 CPROI71 De HH2 365Ko 21 14W 362 CPR0180 D6 HH2 309K 2 1 1 4W MF 363 0034 5 2 2 2 0 45 1 4W CF 1364 CPR0050 D5 EE6 08 Jumper Wire 364 CPR0142 D5 6 7 15 1 1 4W MF 365 CPR0050 C5 J 00 Jumper Wire 366 CPR0142 D5 EE6 7 15KQ 1 1 4W
38. 1059 PP7 33uF 35 250V Film 443 CPC1062 H6 PP7 56uF 5 250V Film 11443 1069 6 PP7 1 5uF 3596 400V Film 1078 6 PP7 1 GuF 5 250V Film 444 CPC1042 H6 OO7 68uF 5 250V Film 444 CPC1050 H6 47uF 5 250V Film 1 444 1050 6 007 47uF 35 250V Film CPC1059 H6 PP7 33uF 5 250V Film 444 CPC1062 H6 PP7 56uF 5 250V Film CPC1069 H6 007 1 5uF 5 400V Film 445 CPS1758 G5 PP5 093 Dia Bead Pin YC4 445 51759 65 5 062 Dia BeadPin vca 11446 CPS1758 G5 005 093 Dia Bead Pin YC3 446 51759 G5 005 062 Dia Bead Pin YC3 1447 1538 65 PP3 12 mH H Raster Shift Inductor 448 1104 4 211 000 35V Electrolytic E 449 CPC1104 F 4 2 1 000uF 35V Electrolytic Hans cecunis ra m2 2000F 25v Eledrayie I TET TT T LT 1 451 0050 64 1 02 Jumper Wire 11452 CPRO050 G4 Jumperwire als Je E 453 cPT1516 Hs 002 sikuz 75m FBT mertrontsosoel elo CR 1 453 CPT1555 002 31kHz 45mA FBT Merton CT 8819 1 453 1558 5 OO2 15KHz FBT Hitachi BWO2651 1 453 1561 5 002 3KHz FBT Meriron CT 8943 5 1568 5 002 31KHz FBT Merton 454 0050 16 007 08 Jumper Wire 456 1044 6 OO8 2 7uF 10 1
39. 1111025 6 el i CPQ1304 2 036 di 5100 021 ld HS 9p im FUSE s 2 127 3 02 136A MA 10 0 022 i N 146 15 8K 037 10 0K 023 Ise Kur NG ME s cv 10K 038 033 Tox 5 e n 081032 065 Jumper lt EB yo T 4 2 toy 040 oe 200K 040 x IN EAN nO MLL NIS 200 Retighten nut after heat sink e e 10 0K 031 amp 123 wave soldering G 163 7 n C 11111028 A AAA 10 z gt i 1_ 3 Lo e ie ur 10 0K 051 10K Joao 4937 12111 1 SARI A 3 92K 042 3 825052 i g A ag ow 1ER ci 33K 043F 13 3K 050 3 3K 053 D 20145560 I 22K 044 Colur 054 108 E 1 000 n Ms LM392 5 LO _ 10 12 1K 045 dab TOK 055 SS o 35V our 047 6 8 056 9 i i ci g 171 O Oo ASS 14 6 8F 057 N E Sc gs 7 182 o A m NIRE 442 058 1 9 ed EE N z r oca EN 27K 060 1 000uF 8 5 dM 047uE 33uF alo 1 35V o9 fol 162 071 O81 082 ef 9 E S S R 093 2 7 064 2222 Mot 14937 080 ip IS lt arg D C Q ER PIN 3 AN 1 065 27K 078 195 5 SSB HO mae peo S Elo xg
40. 1367 CPROOO2 D5 180 35 UAW CF 368 CPROO11 D5 CC3 1 8K 5 1 4W CF 1369 CPC1005 1 000 10 500V Ceramic 370 0015 5 JJ 2 22 45 CF 371 CPROO29 Ds 1 200K0 35 AW CF 372 CPR0029 D5 1 200KQ 5 1 4W CF 11373 CPQ1303 D5 KK 1 30V 6A NPN PN2222A 374 CPC1032 D5 GG1 OluF 45 50V Film 375 CPR0018 D5 GG1 62KQ 45 1 4W CF 375 CPR0019 D5 GG1 100KO 5 1 4W CF 375 CPRO157 D5 GG1 127KO 31 14W MF 375 0156 5 GG1 93 1KO 1 LAW ME 376 CPC1102 D4 FF3 100uF 25V Electrolytic 1 377 4265 4 GGO V Deflection Boost 1 377 415 E4 GGO V Deflection IC LA7838 378 2028 FFO LA7838 Heat Sink 378 2028 4 FFO LA7838 HeatSink 378 2037 4 FFO LA7838HeatSink s78 cPMziziF4 FFO LA7838HeatSink 3 8 CPMZIZZFA FFO LA7838HeatSink s78 cPMzi4lF4 FFO LA7838HeatSink 379 CPQ1303 E4 30V 6A NPN PN2222A 1380 cPC1109 E4 111 470uF 50 Electrolytic 381A CPC1035 D4 HH 1 3 300pF 5 100V Film 1382 1252 4 111 1 1KV Diode IN4007 382 CPROOI9 E4 HH1 100KO 35 1 AW CF 382 CPRO158 E4 HH1 84 5K 2 1 1 4W MF 383 CPR0029 E4 200KQ 5 1 4W CF C545 384 CPROOIS E4 2 22 0 35 vaw cF A 385 CPRO375 E4 2 680 5 1W 385 CPRO376 E4 HH2 1 20 35 1W MO 387 1104
41. 22K 0 25 LAW CF fost ns ooka ves me Aleleloie dam Ci E Es A A r e cic Im e e Es Im LIL A ES TF 21515 TO un L J PPrPFPPPPFPFPFFPFFPFPPPEPPFPFPPPFPEFPPPPFPFEPFFPFPFEFPFIFFPEPPPPPPI CERONIX XX93 Monitor Part List 46 A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B CPA4235 1493 CGA H CPA4250 1793 SVGA CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA CPA4232 1493 SVGA J CPA4255 1993 VGA CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA W ISO XFR 100W F L Vertical Deflection Booster TUVWxX Com PRICE CPA4244 1793 VGA CPA4256 1993 SVGA CPA4104 2793 CGA A Bd Part No Bd Sch Ref B 043 CPROOI6 A3 118 33 35 Vaw CF Joas CPROOI7 A3 LLB 36 35 VAW CF 043 CPROO18 A3 LL8 G2KO 35 Vaw CF 043 CPR0145 A3 LL8 15 8KQ 1 1 4W MF B 043 CPROIS3 A3 LL8 20 0 31 1AW MF Joas cPROIS4 A3 LL8 42K0 31 LAW MF 043
42. 4235 1493 CGA CPA4250 1793 SVGA 4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA D CPA4232 1493 SVGA J CPA4255 1993 VGA P CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA 150 XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description E IJK LM 1899 CPD1250 N3 UUO 100mA 200V Diode FDH400 u k fL E E 8 E i m 900 0365 31 0 2700 25 1 2W CF 900 CPROS71 N3WWO KO 35 CF 901 CPC1040 N2 SS1 015uF 10 250V Film 902 0050 2 J OO JumperWire 003 CPD1252 N VV3 1A IKV Diode IN4007 904 050 2 02 Jumper Wire 905 CPD1252 MWWS 1A 1KV Diode IN4007 906 CPD1252 maww3l1A IKV Diode 1N4007 907 CPC1058 M2WWA 1uF 5 50V Film 908 CPROO16 M2 4 33 45 1 4W CF 0024 274 3 30 15 CF 910 0016 2 YY5 33KO 3596 AW CF on 0016 2 YYS 33KO 35 UAW CF 912 0018 2 224 62K 5 1 AW si3 CPC1037 N TTO uF 35 250v Film 914 CPROI45 N1 724 15 8KQ 1 i Ho sferroosojnit 1 8 jumper Wire BIC lote T Je IIc 317 CRT jala Ie ole
43. 9 100pF 310 500v Ceramic 130 cPD1251 F2 KK7 10mA 75V Diode 184148 130 CPD1253 F2 KK7 1A 600V Fast D 144937 131 CPC1003 E 1 JJ 9 2 200pF 20 1KV Ceramic iz ceDu2s2 F1 6 1A 1KV Diode IN4007 132 CPROO50 F1 JJ6 00 Jumper Wire 133 CPR0002 E 1 JJ 8 180 2596 1 4W CF 134 cPRou47 F1 7 L00MO 31 i35 cPM2037F2 KK8 HeatSinkForP S FET iss ceMziz3F2 KKS HeatSinkForP S FET 1 136 1304 2 KKB 454 450V Mos Fet 250144615 _ 136A 0050 2 KK 8 22 Gage Buss Wire under P S 137 CPRO389 F1 KK8 330 25 2W MO 138 CPC1006 G1 8 200 10 IKV Ceramic 139 CPR0033 G1 JJ 6 300 5 1 4W CF 140 CPROS50 F1 8 470 10 1 2W CC 141 01253 61 116 1A 600v Fast D 184937 1 142 cPD1264 H1 KK6 2A 600V Fast D FR205 F ws cPRooi Hi HHS e2Ko 15 jaw CF 1438 CPROO17 H1 HH8 36KO 15 I AW CF 144 1107 1 ce 33our 250V Electrolytic 144 1111 1 GG8 220uF 2 0V Electrolytic 145 CPS1753 1 GG9 2 Cond Right Angle Header 45A CPM2003 1 CableTie 4 i4e cPRo455 2 GG9 3AmpSlovBlo 1148 CPD1264 2 GG7 2A 600V Fast D FR205 F 149 CPD1255 F1 JJ 7 18V 1W Zener D 1N4746A 150 CPC1003 2 GG7 2 200pF 32096 1KV Ceramic 1 151 cPD1264 2 GG7 2A 600V Fast D FR205 F _ 152 1003 1152 GGE E 153 TE GG7 2 200pF 20
44. Airport Road Auburn California 95602 SCALE NONE 4 10 96 1 3 24 99 5 DRawney F H 2 18 92 9 30 96 E4 03 06 02 E8 9 CERONIX Model 2793 CGA arno CPAALOA Monitor Circuit NN OO EGD Composite sync solder connection Pins 1 to 2 B Remote Connector C m F G n 7771538 114007132 300 139 4937 62K 143A 2 ama fag tesz POWER e 1371 E 4746 149 x 02 533 FR205 122 Tu i l 180 133 i 200K 005 08 531 gt CPS1753 Y D 1371 en Ei deme JA JB JC amp JDjpra111___ Power Supply Control 330 2W 137 145 62K 011 _ 9 e 008 M uem ls iii 5571 1 00M 134 id 2 m VUT 2 rd 1K 012 019 EA T ILS Sa Sl en 8 M e MS A 30 59 B AA L 15 8K 020 d
45. Array Increases V line by 1 5V JD Increases V line by 3V POWER SUPPLY RESISTOR ARRAY J P N CPR0501 13 FET Source C5184 Pin Normally GND 200V Power Supply Resistor Array J Film D 2 EA FB m out C P N CPR0506 i sense IC Hfo 4800Hz amp ID Hfo 1 600Hz TL H Drive Damper P N 502 20 Damper Cap P N CPR0501 aw LINE Precision Resistor Arrays PRAs A Increases Output Voltage by 10V 9 25V LINE Video Amplifier Resistor Array K Film P N CPR0510 Precision Resistor Arrays PRAS A Increases Output Voltage by 10V 1802 K2 K18 LINE B DIODE LINE Output BLUE Video Amplifier Resistor Array BLUE Film P N CPR0511 A 455 44150084 NO11931334 1VOllLd3A 9CcVVdO XINOWudO Z A X nn e YP oo Oh eye Ol ater EX 109553 93e duu0 p LDDUUOULDULUQULUOLUQULULUDLULULULJ C00 IN dO TrTZIWdD 7 x MNISLY3H 9 98 V1 219 dex TOSZIWNdD ER 9191990 god dwy eorueA AN C ar e aW 3 CESI E8 d eo OO 7 SI O ma C1 Ni TO Z A X Drive Signals To The Monitor Input form is included
46. C E 189 367 uu 15 8K 408 4 Yoke Connector 093 Pins yo 445 a mi 294r BN S iN 1745K 366 zT lt Ae ae 1 000pF 1K 468 00 235 Q 2 2 e 7 15K 364 S S CPC1058 RELAY N IRL M 00 236 eae Ah 44 40 2 9 _ A n HERNE A 4148 2701 S j 250 365K 362 E E LA7851 E 9 183 gt 33UF 200V 444 lt N E D ci 4148 27111 127 361 co eon Label W 334 J CPT1556 105 5 12 1K 360 414 i m 1571 443 EB DIPAN d 00 283 G3 358 A Horizontal Control IB IC 1 416 AL H L Coi En A gt in JAA s je EES 346 I PRA 7 500pF 1 6K 58 2 c l eic d 56pF DI eA EN 473 Label W H 752 H 5 518 A 57 194 S IO JS 3 92K 356 Sole LL li ee rl S ROlo st 5 3 517 E co co 345 N pr 1 441 A 2 4700 LOL 1 LM339 i AASA d 1557 Label W H 1528 LO ee 6 ast 512 3291 335 7 ANSA EE E 3 c l Eeer mi o SN 27K 3368 3 S A mp ML WE 464 NEE BE cay 2 4007 333 ve 431 3 wee NA Ew M OT Y 200 rf 22QuF o 5 Si m QSi233 E ndi oe dA O 2SC5690 433 ee ist IO 1 l
47. CC7 2050 21 M 1232 CPROI73 A5 CC7 64 90 31 1 4W 232 CPROI75 CC7 69 80 1 1 4W MF 232 CPR0182 A5 7 54 90 1 1 4W MF 233 CPD1252 233 CC7 2 20 5 1 4W CF E 233 CPRO003 A5 7 4 70 5 1 4W CF Bees Ee Ieee ee ec e ese esee es een Ile a E d LER E b E EE Pelee GER CERONIX XX93 Monitor Part List 51 A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B CPA4235 1493 CGA H CPA4250 1793 SVGA CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA CPA4252 1493 SVGA J CPA4255 1993 VGA CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description 233 CPROO50 A5 CC7 00 Jumper Wire 233 0129 45 CC7 3400 31 1 4W MF 235 CPROO50 A5 BB7 00 Jumper Wire 236 050 5 AA7 Jumper Wire A 236 CPROI29 A6 AA7 3400 31 I AW MF 237 CPQ1301 A6 BB7 60V 6A PNP PN2907A 238 1301 5 7 60 PNP PN2907A 23
48. CRT arcing PNP transistor is used as a voltage translator to direct the grid pulse from the auto bias 1 The voltage on G1 is normally 15 to 27 volts depending on which CRT is used When the grid pulse at pin 11 is low the current from resistor is conducted to resistor and produces a 10 volt pulse on the minus Glline Capacitor and resistors amp protect transistor from CRT arcing The auto bias IC CA3224E is designed for a supply voltage of 10V and since the video amplifier requires 12V three diodes 903 905 and are used to supply this IC Resistors and form a voltage divider which supplies the auto bright bias voltage to theLM324 920 The green and blue channel circuits are identical to the red channel and are controlled by thetiming logicin the same way Refer to the waveforms at the bottom left of page 34 for thetiming relationship The vertical retrace boost pulse from the LA 7838 15K Hz models or the delayed vertical sync pulse from the sync delay circuit 25 amp 31K Hz models starts the 21 count auto bias state counter This pulseis applied tothe auto bias IC through resistor The negative going flyback pulse which is used to heat the filament also supplies the horizontal syncto the auto bias IC via diode and resistor 888 The grid pulse becomes active between the 15 and 18 horizontal cycle and the program pulse is active between the 18 and 21 horizontal cycle Thesetwo pulses in conjunction wit
49. E Jefas kft 918 0050 1 J O9 JumperWire 920 1405 M2WW4 Quad OP Amp LM324 921 CPC1058 M1WWA 1uF 5 50V Film m 922 CPC1036 M1WWA 047uF 45 50V Film KL 923 CPC1058 L1 WW5 1uF 5 50V Film 924 CPC1036 L 1 WW5 047uF 45 50V Film 925 CPC1058 L1 WW5 1uF 5 50V Film 926 CPC1036 L1 WWe 047uF 45 50V Film 927 1402 L2 XKA CRT Bias IC CA3224E 928 CPQ1301 K1WW7 60V 6A PNP PN2907A 930 CPC1058 K1 VV7 1uF 5 50V Film 931 CPROOLI K1 WW7 L8KQ 35 CF 932 CPROOSO L1 J 0o Jumpe Wire x 933 CPROOII KI WW7 L8KQ 25 934 CPC1058 K1 RR7 1uF 5 50V Film 935 CPROOS0 L1 J O0O JumperWire 936 cPROOSO Ki 00 937 CPROSIO K1 RR5 K PRA Video Amplifier __ ROS M Viie A 938 CPROO11 K1 7 1 8 45 1 4W CF 940 CPRO140 K1 VV7 3 92K 2 1 1 4W MF oar cecaos iai vva 2 200pF 220 IKV Ceramic 942 cPQ1302 K1 VV7 30V PNP D 5 64 943 1308 2 557 200V NPN 25 3467 Honafcproosojk2 jumee wire In BIC 945 1301 2 557 60V PNP PN2907A A 8 Ic Ip Je Ir alHl u IK IL s46 cPROOSO K2 J 00 Jumper Wire fale lc Jole lF Jelai fu ik u 947 CPRO050 K2 J OO Jumpr Wire fa B c DE F Je Hfi Ju K IL Joas CPROOII K2 TT7 18KO 35 ce Alp c t
50. FBT Capadtors 125 and resistors 126 are connected as a low pass filter to smooth out the simulated EHT voltage which is then applied to the C5184 at pin 14 Resistor protects the C current sense input from voltage spikes and resistor protects the PNP transistor from momentary overvoltage damage dueto line spikes Zener diode protects the horizontal and video circuits from overvoltage due to power supply failure If the 127V line exceeds 160V the zener diode shorts to GND the 127V line At the input to the power supply is a voltage doubler which outputs between 240 to 425V DC depending on the AC line voltage It has a three amp fuse 146 to protect the PCB traces an inrush current limiter to protect the rectifier diodes amp Capacitors and are used to reduce diode noise from the monitor to the AC input For 220VAC operation the voltage doubler is replaced by a full wave rectifier by adding diodes 151 154 capadtors 152 and removing the jumper at 152 amp aretheraw DC filter capacitors Resistor supplies the power supply start current and resistors and balances the series connected filter capacitors for 220VAC operation Caution When working on a monitor with a degaussing relay unplug the degaussing coil to avoid causingtheresidual current relay to close on a cold posistor This can happen ifthe 24V lineis energized by a external power supply SWITCH MODE POWER SUPPLY SCHEMATIC V plus 20V Video Supp
51. FF7 i8Ko 35 UAW CF 258 CPR0131 C5 5 4640 1 1 4W MF 258 CPR0134 C5 BB5 1 21KQ 1 1 4W MF 259 1101 6 FF7 10uF 50V Electrolytic 260 CPRO130 C5 885 4120 31 14W MF 260 CPR0136 C5 5 1 62 1 1 4W MF 261 CPR0050 B5 885 00 J umper Wire 0 30 long 261 CPRO145 B5 BB5 15 8KO 21 14W MF 264 CPROI20 BS BB7 100 31 LAW MF 264 0124 5 BB7 75 00 1 1 4W MF ES iiie 906 jol lol _ Lim el xm I I I H H H H H H H H E H El H H HI a H 264 cPRo127 B5 BB7 2050 1 vaw Mr 264 CPRO12 B5 7 84 50 31 AW ME 264 CPRO175 B5 7 69 80 31 LAW MF 266 CPQ1301 B5 7 60 PNP PN2907A 266 0050 6 7 on Jumper Wire 266 CPRO128 B5 Cc7 3010 21 UAW MF 267 cPc1102 B5 DD6 100uF 25V Electrolytic jae CC7 10ma 75V Diode 184148 268 cPb1251 B6 CC7 E 1 Be B87 10m4 75V Diode 104148 268 CPD1251 270 CPD125 BPPPPPFPPPFPPFFPPFPPFPPPEPFPPFFPPFFPFPPFPRPFPFPPPFFEPPPEPFFFPPPPPPPI CERONIX XX93 Monitor Part List 52 A CPA4233 1493 CGA G CPA4247 1793 SVGA M CPA4112 2093 CGA S CPA4231 2793 VGA 4235 1493 CGA H CPA4250 1793 SVGA CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200
52. G G G F G G G G G E BI G G E G E E E E E ES E G G G G F G G C C OO E E H BE F G H GI H E M E H E E B E E E E E E EN Hi HI Q E a KE s A az KAA OK AD elelee S S S eS dd Jm 2 2 BIRD ERES SES EE SR FEES EE EA ESA ES E Deere Ee CERONIX XX93 Monitor Part List 59 A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B CPA4235 1493 CGA H CPA4250 1793 SVGA N CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA CPA4252 1493 SVGA J 4255 1993 VGA P CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA 4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA R CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description E amp 11 CPRO510 N1 RRO K PRA Video Amplifier 812 1301 2 SS2 60V 6A PNP PN2907A 813 CPROOSO
53. HET y AC VIDEO line Isolation DIVER des Transformer DRIVER 166 137 The switching regulator includes the When the FET is turned off the stored power FET which passes current from energy in theinductor continues supplying V to GND through the inductor 166 current to GND Butin this case the During thetimethe FET is on the current current path is from V to GND instead of in theinductor is increasing and the V to GND Duringthis part of the inductor is storing energy the current in the inductor is decreasing U nder normal conditions the current will decrease to zero and the voltage will ring FET drain voltage LI VMT Current in inductor NF Current supplying GND Voltage across ALO Ses Current from V Current in diode _ N Current added to the 127V line Flyback pulse As can be seen from the waveforms the The C5184 is the series regulator largest number of changes occur when theFET is IC All of the control circuits that are turned off Also theFET drain voltage switches built into this IC work together to produce fast due to the high inductor current To one output signal which is the FET drive minimize video interference from the power signal This signal can take on many supply the power supply is synchronized to the shapes depending on theload conditions of horizontal oscillator such that horizontal the power supply The waveforms for blanking is coincident with the FET turn off time
54. Monitor Shut Down Circuit E 200K S 12V osi Im PGND u GND EES je 7 1 121V Video V J un y FBP 084 FDH400 18V ao P 109 005 GND e BEE ODT BEAM 5 FDH400 J SSAKAS HORIZONTAL WIDTH CONTROL 5 1 1 1N4937 aw ni s El ja gt H S 12V 10 0K 10 0K 1 47V 8 2 92V 170 70 031 1N4937 00 10 0K 91 4K J13 A EN 12V ABL TTL 2 1371 00 1500 430 1 2W Controls XRC5346A 2 AN Linearit 6 546K coll 12nF 6 15 Pincushion CPT 330pF 1 6KV 7 15K Correction 1557 3T 4 6Vpp 59 D6 14 8 18VDC i 16 14 8 18VDC 11 5 2voc 60 D6 x 391 4 pur 139 141 4VDC 20VDC Hs E 02 02 3 i41 12 Blooming i 0 56uF 15 8K 15 8K 28 0K 4 amp correction 1218 250V 355 10 030 JA A 444 215K CPT1560 4 19VDC 457 Dese 7 27Vpp 36 J7 50uH ASE 027uF 1N4937 CONTROL amp FAULT SENSE 4uS DELAY PN2222 AVDC zovac Vs 11Vp2 15V pp 37 16 Max Min Hsize 100K 12Vpp 38 J7 nrush
55. S or Delayed Vertical O S H Sync J Beam urrent CRT Auto Bias Buffer V Sync TC2 GND TC4 12V TC1 16V Blanking amp Beam Current Limit amp Beam Current Limit VIDEO GAIN Remote FDH400 S 0 LINE Control PCB 1 62K 6040 1 21K 12V 1 IET 5 9Vppl61 B4 076 Note 260 m 2 7K 100uF The damp 271 diodes are 279 1 24K FDH400 installed AEN ABL TTL VC backwards with 0 respect tothe XRC5346A EE PCB legend Controls 1N4148 3010 R N Video B and there is no video amplifier output For the red and VC vc a ve GREEN BLUE green channels a 1 volt change at the video input 292 INPUT INPUTL produces a 15 volt change at the video amplifier output For the blue channel this change is 18 volts but resistor In each of the video interface circuit configurations subtracts the equivalence of 6 volts from the input current from the interface circuit is converted toa which results in the same saturated color as the red and voltage at the CRT cathodes Thesimplest current green channels path is accomplished by the negative analog video interface configuration The clamp diodes 271 amp limit the maximum current tothe video amplifiers This avoids The voltage drop across the input resistors and over driving the video amplifiers when undershoots at for the red channel is the current which drives the
56. Vertical Deflection Circuit Description and 5 79 81 Horizontal Deflection Circuit Description and 5 82 83 Horizontal Raster Width Control Circuit 64 Horizontal Raster Width and Position Control 85 Dynamic Focus Circuit Function and 86 Vertical Booster Amplifier Circuit and 87 Simplified Power Supply Circuit Function 10 10 112006 88 89 Switch Mode Power Supply Circuit Description and Schematic 90 91 Trouble Shooting and Repair Equipment Setup for repairing the Model XX93 Monitor English 92 Equipment Setup for repairing the Model XX93 93 Power Supply Trouble Shooting 94 Trouble Shooting anna ra De e dank ic da 95 97 Filament Voltage Fest JE NGI SI VR HER ER ES E c ed 98 Filament Voltage 99 Setup and Convergence Procedure E 100 Setup and Convergence Procedure German esee nnn
57. Wire 093 CPR0004 C3 4 2700 5 1 4W CF 094 CPROOSO C3 NN8 00 Jumper Wire 095 143 3 8 10 0 0 1 1 4W 096 CPROIG3 C3 NN7 28 0K0 21 14W MF 097 CPR0016 C3 MM 7 33K 45 1 4W 097 CPROO18 C3MM7 62KO 59 14W CF 097 cPROI46 C3 MM7 169Ko 1 UAW MF 097 CPR0155 C3 MM 7 68 1K 2 1 1 4W MF 097 CPROIS8 C3 MM7 S45KQ 31 1 4W MF 097 0163 3 7 280 02 21 14W MF 098 CPRoo18 D2 BB1 G2KO 35 147 CF 099 CPR0013 D2 1 6 8 5 1 4W CF 099 CPR0018 D2 BBi ezKo 35 UAW CF 100 CP11416 D2 2 7 Bit Counter 040248 __ T1004 CPR0050 02 Jumper pins 5to10 108 CPQ1303 D3 BB2 30V 6 NPN PN2222A 101 CPC1058 D2 BB2 1uF 5 50V Film 11102 1027 02 HH8 6 800pF 5 100V Film 102 CPC1035 D2 8 3 300 5 100V Film 104 1000102 HH7 56pF 45 100V Ceramic 105 017 02 8 36 0 35 4 105 CPR0018 D2 GG8 62K 2 5 1 4W 105 CPR0029 D2 8 200 5 1 4W CF 105 CPR0122 D1 GG8 7 15K0 21 14W MF 105 CPR0143 D2 HHB8 10 0Ko 31 1 4W MF 105 CPR0153 D2 HH8 52000 1 4W MF 1105 CPRO155 D1 GG8 68 1Ko 196 LAW MF 105 CPRO163 D2 HH8 Bios OKO 31 1 AW MF 1105 Cpro168 D1 GG8 8 06K0 1 14W MF 105 CPRO172 D1 668 140 0 31 14W roe cemorse pz 215 21 uw
58. XRC5346A Synchronized Vertical sync ee ee OO rex H S 12v 10 0 10 0K 08 5 66254 I2 36vpd 33 B2 10 0K 00 1500 430 1 2W H 200pF H Linearity Linear coil Pincushion Correction 1 1 7V 34 B2 disabled D 1 Se wa T A 3 Blooming 225 233 A442K 28 0K 4 amp correction Min 10 355 14148 750uH A m A 134937 p m CONTROL amp LS5VDC C FAULT SENSE u E 4uS DELAY 4708 1 2W CC Relay LEGEND fe VC VC GREEN 3 gt INPUT BB i CC B Vs Hs BLUE VC VERTICAL yc vC HORIZONTAL _INPUTL amp SYNC 2 LLISYNC DD TEESE 200V 5A 434 2 4 Black Wire i 58 TEDN gt A 157 V 27Vpp 57 1 aretaken with xcv voc Sync cos pin 5 RA a white screen Vp p TP REF 2 sl E N CAUTION POWER SUPPLY VOLTAGES REFERENCED FROM V Hs 5uS div Dad SCOPE GND MUST NOT BE CONNECTED TO GND AND V AT THE SAME TIME Vs 2mS div EE FF GG HH T JJ KK LTR No 2 OVDC X lt M easurements X Y VDC BOARD PART No PART No ON PRA PRA PIN No DC VOLTAGE RANGE USING A DMM SE V or H SYNC AC VOLTS TEST POINT Peakto Peak ASS REF Measured with scope 4 4VDC 20voc Vs 11V pd 15V pp 37 16 Min Hsize 12Vpp 38 J7 13350 New
59. a second control feedback loop to reduce picture variation due to CRT aging The auto bright circuit is also used to turn off the beam current when the monitor power is turned off The CRT for the 1493 1793 and 2093 monitors have a 90 deflection angle The 1993 incorporates 100 while the 2793 CRT has 110 and the 3693 has 111 deflection angles These picture tubes have integral implosion protection and a EHT of 25KV The Vertical Dynamic Focus amplifies the parabolic waveform across the vertical coupling capacitor from about 3Vp p to about 200Vp p depending on CRT reguirements This waveform sharpens the top and bottom portion of the raster on dual focus CRT s The Horizontal Dynamic Focus amplifies the parabolic waveform across the horizontal coupling capacitor using a transformer to produce 300V output from an input that is about 33Vp p This waveform is added to the vertical dynamic waveform and sharpens the right and left sides of the raster Blanking is accomplished by setting the gain of the interface IC to zero during blank time The Horizontal Blanking pulse is generated by amplifying the flyback pulse The Vertical Blanking pulse is started by the vertical oscillator one shot and ended by the counter in the auto bias IC via the bias out pulse The Master Gain control located on the remote PCB sets the gain of the video signal when blanking is not active The Beam Current Limiter circuit which is designed to kee
60. bias current is frequency dependent and has a range of 3mA to 15mA Resistor and capacitor 887 which are connected to the 9 25 volt line decouples the video amplifier current pulses from the 127V line The9 25 volt lineis connected to the emitter of the NPN push pull transistor by resistor k4 This voltage establishes the output voltage of the NE592 in the middle of it s 2 volt driverange The9 25 volt lineis regulated by darlington transistor with voltage divider resistors amp 940 VIDEO BOARD POWER SUPPLY AND ARC PROTECT SCHEMATIC 127fV Caution 2 pin degaussing coil plug CC1 amp CC2 must be plugged in such that the pin From MAIN PCB with the extra wireis dosest tothe fuse FDH FDH FDH 400 2400 2400 2400 From Video Grid Pulse 23 to 27Vdc OVDC Ean 16V for the 2793 CGA monitor 847 150 2 12V GND Thehigh voltage in the CRT through an arc can be conducted to any tube socket connection on the video board Toreducethe danger of these arcs causing component failure a number of arc current paths are provided Thetube socket has integral spark gaps which conduct arc current tothetube ground aquadag through dissipation resistor 882 The damping voltage of the spark gaps tothe cathodes and Glis about 1 5KV The peak arc current tothe video amplifier outputs is limited by resistors 900 851 amp 883 Each amplifier output
61. comes from the vertical linearity circuit This circuit uses the above and below GND parts of the vertical current waveform separately Transistor conducts when the vertical current waveform is below GND This transistor s emitter is referenced to GND by diode and resistor 371 The emitter is connected to the vertical current waveform through resistor which is adjusted for each tube and yoke combination 22 28V VERTICAL DEFLECTION SCHEMATIC Thermal Protection va Vertical Linearity Circuit DECREASES TOP AND BOTTOM VERT SIZE Capacitor multiplier for the 2793 Boost GND mE 11 a L 1N4005 00 1 5 2 7V 24 24 4 GND INCREASES TOP AND BOTTOM 2503467 V RAS POS 1594 7 VDC YC1 VERTICAL YOKE 1 000uF 427 u The output of the vertical drive differential In similar manner the positive half of the vertical current waveform is conducted by transistor diode 405 and resistors and Both transistors and may be connected to pin 4 via solder connection H or they may be connected to inverting transistor and resistors and 413 Theinverting transistor is connected with solder connection 1 and decreases the vertical size at the top and bottom of the screen Theramp capacitor is connected to a differential amplifier at pin 6 and the negative feedback from the yoke return line is connected to pin 7 This negative feedbac
62. drive current waveform vertical booster amplifier LA7838 output current waveform circuit These current waveforms describe how the eflection vertical booster circuit 2 4Ap p 22000 Yoke reduces the LA7838 output 3 385 425 YC2 current to a current which is well within the specification Vertical booster current waveform of the IC The output of the LA 7838 is connected to the yoke by a 3 3Q resister at It also drives the bases of transistors 601 603 through 4 72 stabilization resistors When the voltage drop across resistor reaches 7V the respective transistor 601 for 7V amp 603 for 7V takes over most of the additional vertical yoke drive current The retrace booster pulse from the LA 7838 pin 9 is connected to the retrace booster capacitor at and is also buffered by an NPN transistor at The output of the retrace boost is connected to the LA7838 at pin 13 and tothe vertical booster NPN transistor at Diodes 604 and conduct current right at the start of retrace This current is produced by the energy in the yoke from the end of the last trace Diode 382 supplies the deflection current to both the LA7838 and the booster amplifier circuits during trace time Stabilization capacitors and are not used at present but may be needed with other output transistors SIMPLIFIED POWER SUPPLY CIRCUIT FUNCTION DESCRIPTION 52V to 127V V
63. erh hen Sie langsam die AC Spannung bis kurz bevor das Versorgungsteil zwitschert Dieses wird die Feuerprobe genannt KAE Dieses stellt die Teilnummer des Brettes XX93 dar Die St ckliste gibt die No CERONI X Teilnummer die zur Brettteilnummer registriert wird Teilnummern der Widerst nde auf dem PRA angezeigt von LTR X PRA Anschlu stiftzahl Geh rt um festzustellen welchem PRA die m x Anschlu stiftzahl suchen Sie nach der n chsten PRA Teilnummer auf dieser Zeile El Gle chstromspannungen werden gemessen um ausgenommen in das Versorgungsteil xyype Zu reiben in dem V die Referenz ist Verwenden Sie ein DVM fur Gleichstrommessen Pr fpunkt Brettguerverweisstandort Die Wellenform wird normalerwe se mit einem Oszillograph berpr ft Sie hat einen P P Vp p TP REF Spannung mfangl Ype 1 VORSICHT Wenn Sie Messen auf dem Versorgungsteil bilden seien Sie sicher da die andere Bereichpr fspitze nicht an Erden angeschlossen wird LEGENDE 4 BRETTTEIL Nr lt _ TEIL Nr AUF PRA Messen werden X x PRA Anschlufsstift N mit einem GLEICHSTROM X X Y VDC 1 V STRECKE MIT A DMM 9 VERWENDEN Sie V oder IN VDC H Synchronisierung 5 Volt PR FPUNKT Vo pITP REF Wechselstrompaekl ASS REF Wellenform zur Spitze Hs 5uS div Vs 2mS div Gemessen mit oszillograph POWER SUPPLY TROUBLE SHOOTING TIPS SAFETY FIRS
64. from the destructive arcenergy Resistors and divide energy due to CRT arcing between the video amplifier transistors and the beam current feedback transistor The beam current is filtered by capacitor and resistor and is buffered by an operational amplifier which translates the beam current into a low impedance voltage This voltage is applied to a coupling capacitor through a 200 ohm resistor The 200 ohm and the 68 1K resistor forms the program value which sets the black level voltage via the action of the program pulse Capacitor is used to stabilizethe transconductance amplifier which is used at the channel input ofthe auto bias IC Theauto bias IC stores the bias voltage of this channel in capacitor at pin 21 This voltage is buffered by an internal amplifier with output at pin 20 which is connected tothe Blue video amplifier bias control input Resistor are part of the auto bright circuit They are used to sum the bias voltage of each of the three channels via a voltage node at the auto bright amplifier pin 9 Theresulting output voltage then controls the screen grid via transistor Resistor protects the CRT grid from excessive current during arcing Capacitor supplies a low AC impedance to GND toinsurethat the CRT gain is constant during each horizontal line Resistor and Load resistor 909 eliminates crossover distortion from the OP Amp 920 Resistor and protects the transistor and OP Amp from damage due to
65. here for those people who problems interfacing their drive electronics with the Ceronix Monitor DRIVE SIGNALS tothe MONITOR INPUT voltage and waveforms work sheet CERONIX Company name 13350 New Airport Road Date Auburn CA USA 95602 7419 Fax 530 888 1065 For CERONIX Monitor Model number VIDEO Forthefollowing measurements use an oscilloscope With noload the black level voltage of the video drive signal is With no load the saturated color voltage is Tosimulate the monitor input resistance With 752 load on the video drive signal or other load the black level voltage is the saturated color voltage is Horizontal frequency KHz High voltage Horizontal sync pulse time uS Low voltage Compare your sync to this table and check the best fit For composite sync Sketch if different Vertical sync Vertical frequency Hz High voltage Vertical sync pulse ti me uS Low voltage lo _ d If there are any questions Complete form and send to CERONIX INC call 530 886 6400 or FAX us 530 888 1065 13350 New Airport Road Auburn CA 95602 7419 DECLARATION OF CONFORMITY Manufacturer C CERONIX E guipment Standards Authorized Signatory Title Date 13350 New Airport Road Auburn California 95602 USA Component Color Monitor Models 1493 CGA 1493 VGA 1493 SVGA 1793 VGA 1793 SVGA 1993 VGA 1993 SVGA 2093 CGA 2093 VGA 2793
66. is connected to two damp diodes 835 899 845 849 886 amp to provide a current return to ground via the power supply filter capadtors 175 amp 860 The grid pulse drive to G1 is protected by a low pass filter made up of elements 855 amp 873 Resistors 881 and capacitor also form a low pass filter for the G2 to auto bright control output connection A dissipation resistor is connected to the focus spark gap to match the impedance of the aquadag connection This reduces reflections and helps dissipate the arc energy Resistor supplies an additional ground path for arc energy FDH UNPLUG WHEN REPAIRING MONITOR Degaussing Coil EHT FOCUS SCREEN Socket Board PCB u 0 mS m 880 T 801 TC 4 DM GND TC 2 Auto Bright Control Output Glis connected to a negative voltage to increase the cutoff voltage which reduces the dot size and produces a sharper picture This negative voltage is generated by rectifying the negative peaks of the filament flyback pulse with diode 870 filter capacitor 868 and resistor 872 Resistor is used to adjust the negative Gl voltage for different FBTs Resistor provides a fixed load to stabilizethe G1 voltage Thegrid pulseis developed across load resistor by a PNP transistor The 120 volt line which is also generated by the filament voltage is used to supply the video amplifier output bias current Capacitor translat
67. monitors with linear power supplies 4 The power supply may chirp if Thetransformer core is broken or a winding is shorted The 33 ohm current sensing resistor value is too high The 17V lineis open goes away when external PS is used There is a line voltage range of about 60 to 70 AC line voltage where a correctly operating monitor will chirp POWER SUPPLY TEST To verify that the power supply is working correctly connect the 17V line as indicated in section 2 on this page Also connect the oscilloscope GND to V and the oscilloscope probe to the FET drive anode of diode 116 There should be a waveform at this point Ifthereis noFET drive waveform check the voltages and waveforms on the C5184 pins and compare them to the voltages and waveforms on the schematic Connect the AC power cord with the AC voltage from the variable transformer turned down to 0 volts TAKE CARE NOT TO TOUCH THE OSCILLOSCOPE AND MONITOR CHASSIS DURING THIS TEST SINCE THE VOLTAGE DIFFERENCE CAN BE AS HIGH AS 400 VOLTS Connect the DVM to GND and V Slowly increase the AC line voltage and observe the power supply response Do not exceed 145V on V If the monitor runs normally a fault may still exist in the power supply 17V linecircuit Note if the crowbar zener is shorted and the FET is internally shorted the C5184 IC should also be replaced Trouble Shooting Handbook Theinformation that is written in this handbook is to help
68. oriented to the left Attach the spring at the other end tothe left hole of the right bottom mounting ear 2 Next attach the degaussing coil Locate the connector wires at the bottom center of the CRT Form the degaussing coil to the contour of the tube at the top two corners Attach and tighten two 3 wireties on theinside hole of the top two corners Loosely attach two 15 wire ties around the degaussing coil and around the bottom ears Tighten the wireties CAUTION The ground cable from the enclosure to the monitor chassis must be connected before applying power to the monitor 3 WireTie d C ie Grounding Strap EEE EU VANUS Degaussing Coil CPS1771 CPS1828 CPS1847 CPS1860 Connector Attach to CRT socket 15 WireTie 2PL CPM 2013 Degaussing coil Connector Spring Plugs in main board left side of fuse Yoke Connector d 3 Plugs in main board left side of flyback transformer 2 Schematic Bottom View PINS Degaussing Coil amp Grounding Strap Attachment Specification For The Model 2793 and 3693 Video Monitor 1 Thefirst item to attach to the picture tube is the grounding strap Lay thetube face down on a soft surface Slide the folded over end of the braid over the left top CRT mounting ear Attach the spring at the other end to the right side top slot in the rimband Pull the bare wire through the bottom slot in the rimband tension the spring and back around the braid
69. run continuously by connecting the external power supply to the 17V line Toaccomplish this connect the external supply OV dip lead to V resistor lead by the power transformer and 20V dip lead to the monitor power supply 17V line cathode of diode Sometimes the monitor will operate normally in this mode in which case watch for smoke and after a few minutes of operation disconnect the power connections and carefully feel around the conductor side of the board for hot spots Overload conditions will not harm the power supply unless there is a problem in the power supply Ifthe power supply is suspect read the POWER SUPPLY TEST section on this page Next check the DC voltage of each of the power supply outputs The overloaded line will have a lower than normal voltage reading The defective component can be located by measuring the voltage drop along the trace of this line 3 IftheV crowbar zener is shorted a fault exists in the power supply which permitted the V lineto exceed 160V First replacethe zener Never operate the monitor without the crowbar zener installed Then read the POWER SUPPLY TEST section on this page Shorts on the V 24V and 16V lines other than the crowbar zener are not likely to be connected to the power supply even though the power supply chirps By operating the power supply with the 20V external power supply many of these problems can be found using the same procedure as are used in trouble shooting
70. swing at the video amplifier input is 1 5 volts and the input voltage swing at the NE592 is 80 volts The reason for using the voltage divider and is that the C5346 minimum output voltage is 7 7 volts and the bias voltage at the NE592 input is 5 3 volts Theinput signal is buffered by a NPN transistor for low input capacitance Resistors and set the black level input voltage at 10 volts Resistor see schematic next page and diode protect the input against arc related transients Resistors and 7 Jare used to set the input bias voltage for the NE 592 Diode acts as a temperature compensator to match the emitter to base diodein the buffer transistor The negative feedback circuit consists of bias resistors K9 and output feedback resistor ki9 The geometry of the feedback circuit defines the AC negative feedback path The autobias output which adjusts the black level voltage is also connected to this node through resistor Kit Solder connection A connects resistor K22 which raises the video amp output voltage by 10V for some CRTs The voltage gain of the differential amplifier is set by resistor Ks The output of the amplifier has a load resistor for faster low going transitions and is buffered by a PNP transistor with base matching resistor K20 Theload resistor for this buffer amplifier is which is connected to the 16 volt line The buffered output of the differential amplifier is DC coupled to the NPN trans
71. the degaussing coil shorting relay XX93 Monitor Block Diagram E G2 290V 2 For Dual Focus i On Video Board G1 20V VIDEO VIDEO Beam 3 3 3 3 Interface AMPS Current Bias B Feedback Auto Bright Beam limit M gain D High tenp limit CRT AUTO Beamcurrent BIAS IC E Dynamic Focus SYNC VERTICAL V sync Grid pulse gt TE Interface used only on Dua T SYNC CA3224E Focus CRTs DELAY EEE o Horizontal Dynamic VERTICAL VERTICAL CONTROL amp OSCILLATOR OUTPUT LA7851 LA7838 V Feedback LA7851 HORIZONTAL CONTROL D Sync delay IP V Ras Pos REMOTE CONTROLS PCB O HORIZONTAL Size Control 52 to 129V ISOLATION LOAD VIDEO amp DEFLECTION Transformer Regulator REGULATOR 424 27V Sync Vertical Deflection Supply DEGAUSSING FAULT OVER CIRCUIT 24V DETECTOR VOLTAGE FBP PROTECT AA Red Video CT eam current symbol on this schematic have special characteristics important to safety these components be sure to use the parts specified in the parts list Components marked by the When replacing any of Product safety note LA7838 Vertical DECREASES Deflection TOP AND 377 BOTTOM Control VERT SIZE LL H L IL e T 1 000uF el 119 198 OVDC OVDC 36V 28 D3 FLYBACK 50 60Hz 1N4007 Horizontal Drive 0 Gre
72. the video input 8 If the yoke position adjustment does not and vertical raster size on the remote control board for under scan Let the monitor run for at least half an hour 9 Switch the generator to the red blue grid Adjust the 4 pole magnets center pair for convergence of the red and blue guns in 5 Check the auto bright control voltage with center of the screen DVM Connec the DMM to GND and pin 8 of the LM 324 on the video board The voltage range is 4 0V to 4 4V If out of range adjust this voltage to 4 2V by using pliers to rotate the bottom knob on the FBT 10 Tilt the yoke up and down for the best convergence around the edge of the grid Insert the top yoke wedge Tilt the yoke side to side for the best convergence around the edge of the grid and insert the rest of the 6 Degauss the picture tube and front part of YOKE wedges Secure the wedges with tape the frame 11 Switch the generator to the white grid Adjust the 6 pole magnets Pair closest to the video board for convergence of the green gun Step 10 and this step may have to be repeated for optimum convergence CAUTION Toavoid electrical shock take care not to touch the yoke conductors or push against the anode cap Always keep one hand free to avoid making a complete electrical circuit 12 If the corner convergence is still not acceptable shunts may be used to correct this problem Shunts are available from CERONI X Shunt ord
73. this voltage is 9 11V replace the pin 8 C Film 917 and or LM324 920 No 1 Vertical osc frequency adjustment Add or remove V solder connection p30 a Br 2 Check H free running freq Hfo f out 2500Hz of sync adj p75 ests Sh ou preformed in 3 Check sync waveforms at input of If input sync to the LA7851 is OK order to reduce LA7851 Hs pin 1 Vs pin 19 and picture roles replace IC 415 chance of EPIS replacing wrong 4 Check voltage LM339 pin 14 Also should check other voltages in this circuit component Normal range is 5V to 7V If outside range replace 355 Probable Solution Retrace 1 Turn down M Gain to minimum Measure voltage auto bias IC If any ofthe voltages are Lines pins 2 4 amp 6 for 5 5V to 6 5V not in the listed voltage Also measure voltage pins 3 5 range replacelC 927 amp 7 for 1 1V to 2 7V If old style C Film no solder Measure voltage LM 324 connection amp pin 5 voltage is 4 8V 5 Should be less than 4 5V add a 7 15K resistor pins 8 to 11 Otherwise replace C F il m Check video gain line J 215 If either V or H blankingis scope sync on Vs 215 2mS cm missing go to that circuit for and verify V amp H blanking further tests 4 Disable shutdown dip V to 109 Measure should be less than 27KV No 1 With applied check voltage 1f OV to 100V ohm out fuse 146 amp ground
74. to V anode of diode 156 inrush current limiter 250 to 5Q Measure voltage lineis OV amp Ohm out crowbar zener diode 181 PS chirps Also ohm out H output Xsr 433 v If the zener is shorted and the fuse is blown replace fuse 146 Ohm out 160V crowbar zener 181 zener 181 power FET 136 and the C5184 IC 115 If the power supply chirps and Ohm out the 17V line V to anode high voltage can be heard of 141 141 149 139 132 J Film pins 8 14 amp IC pin 15 If the power supply chirps check for shorted secondary voltages by First ohm out diodes 142 168 Disconnect power to chassis i Apply external DC PS to 16V If PS current less than 5A and 12V line at cathode of diode 169 line 11 5V to 12 5V goto next test Apply second DC voltage to 24V If PS current less than 3A line OK lineat cathode of Check base of output for drive waveform If OK connect 24V lineto V line and check flyback FBT Check at low voltage waveform at collector of Without H deflection load PS chirps If large and small pulses observed replace the FBT Filament Voltage Test When replacing either the flyback transformer or the video board the filament voltage may not be correct Measuring the filament voltage is not accurate using a true RMS voltage meter because of the high frequency components which make up the filament voltage An oscilloscope with RMS capability may be
75. used to measure the filament voltage Although a visual check of the filament color is a indicator of the filament voltage it is a good practice to check the filament voltage if there is any doubt about this important monitor parameter Thefollowing filament voltage test is an accurate method of finding the true RMS voltage to the filament This is accomplished by comparing the light output of the filament when it is driven by the monitor to the light output of the filament with an applied DC voltage using a loaded photocell ISOLATED DUAL 1A DC POWER SUPPLY 9 tooted flies emm e Video Boarc Tofind the filament voltage l Solder two short buss wires tothe filament pins to dip on 2 Use black tape to secure the photocell over the hole the plastic CRT socket connector Caution Be sure not to move the photocell between the two tests 3 Recordthe DC voltage output from the photocell with the monitor running normally The monitor should be powered up for 10 minutes before making this measurement 4 Turn off the monitor Connect the variable voltage 1 amp DC power supply to the filament The negative lead to the filament ground at the CRT socket pin 10 6 Adjust the power supply voltage for the photocell reading recorded in step 3 7 The eguivalent filament RMS voltage is now recorded by measuring the DC voltage at the CRT socket pins 9 and 10 HeizfadenSpannung Test Wenn der EHT Transformator o
76. withstand this type of stress A linear ramp current is produced in the horizontal yoke by the conduction of the horizontal output transistor trace time A fast current reversal retrace time is achieved by the high voltage pulse that follows the turn off of the horizontal output transistor This pulse is due to the inductive action of the yoke and flyback transformer The main function of the Flyback Transformer FBT is to generate a 25 000 volt EHT potential for the anode of the picture tube This voltage times the beam current is the power that lights up the phosphor on the face of the picture tube At 1 5mA beam current for the 2793 monitor the FBT is producing almost 38 watts of high voltage power The FBT also sources the focus voltage screen grid voltage filament power and has two more secondaries which are used for control functions The FBT has a built in high voltage load resistor which stabilizes the EHT for the low beam current condition This resistor also discharges the EHT when the monitor is turned off which improves the safety of handling the monitor etr a The Remote Control PCB houses the CONTROL DESCRIPTION CIRCUIT 1 H SIZE Horizontal raster size Diode modulator 2 V SIZE Vertical raster size Vertical control 3 V RAS POS Vertical raster position DC current to V yoke 4 H POS Horizontal picture position H sync delay
77. 0 0637 Hr tho 212 9 15 158 081 082 um s 5 e 49090 064 14937 080 aa g dg T1K 065 a p 9 S fo S v e 31750 066 EN k Ae a E S IP aS e lt m 74 I ap 2222 Mot 92 eel TI 6040 076 Xig S i Wozu TEE M 1 LO V aa WENN eae Saas gt 02 068 206 12 pin video board connector ME CPM 1 000uF Un CPS1757 35V koma Ki MEES 09 bd EI N IL T e 7 lt A 209 G LM393 e 1 09 419400 213 G S 02 522 RM ei LO dh 00 218 377 LA7838 V Booster Amp 0 127K 388 00 502 ET 15 8K 223 158K 242 100 390 x T3 ann Dem Em sa 7911 1 224 de A J J m 2702 508 0a Basler aa iom 218556 Aurel rz O 464 90 226 ol le REM k ike S 2222 136K 402 207141 eiu gt u 227 5346 D It Lo oo _ 68 1 403 fe A gt e a CO 200K 9 2 G LO g 241 i SUPPE 84 5K 404 d al IG CPT1538 02 228 S co 200K 371 Ril Zo NE a 4148 405 RI 447 20 E M gt 22K 370 2907 14148 406 8 T FBT 453 e n A x P Zi 407 2 52 SL FBT Meritron CT8981 CPT1568 3 g
78. 00V Film 456 1064 16 OO8 6 8uF 35 100V Film 11457 1504 17 007 750uH Horz Width Inductor 457 1528 17 007 150uH Horz Width Inductor 11457 CPT1560 7 007 100uH Horz Width Inductor 457 CPT1564 17 007 70uH Horz Width Inductor _ 458 1511 7 007 50 Control Inductor 460 CPQ1315 6 008 BA 1007 Mos Fet IRF520_ A 461 CPR0006 6 8 5100 5 1 4W CF 462 CPD1253 6 NN7 1A 600V Fast D 144937 463 CPC1005 6 008 1 000pF 10 500V Ceramid 464 CPRO365 6 0084700 5 JW CF 11465 050 16 PP1 00 Jumper Wire 465 0352 16 1 4700 10 1aw ce 466 0050 16 2 00 Jumper Wire 468 CPRO433 5 EE9 24V coil 200V 6 54 Relay 470 52 6 9 4700 10 1 2W CC 473 0050 66 02 Jumper Wire 11475 CPRO374 H7 7 100 5 IW MO 1476 CPRO374 H7 100 25 1W MO 11477 cPD1266 H7 7 2A 400V Fast D HER205 _ 478 CPD1266 H7 PP7 2A 400V Fast D HER205 480 0050 67 J 00 Wire 500 1041 4 3 35 50 Film 501 0009 64 1 0 35 aw CF d E E p B J L E Ej ES a BEE L J J RER u L JEC z z E _ ELLE ES E a A a ca O O O S u ag L
79. 04 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description E PRICE 958 CPD1250 K3 TT7 100mA 200V Diode FDH400 959 CPD1250Kalwwo 100mA 200v Diode FDH400 961 51758 Kal 1 093 Bead Pin Dag GND _ lepmoogkal cabletie 4 1 2043 Video Board Cover Tepm20sal Video Board Insulating Sheet 1 971 51766 22011403 DegeussingCol 71 cPsiz71 22012093 Degaussing Coll 1 971 51786 22012793 DegaussingCol 1 971 2 51828 220 1793 Degaussing 971 cPsi856 22013603 DegaussingCol 1 971 51860 Zzo 1993 Degaussing Jeps 775 14 Groundingstrap fers 20 Groundingstrp 517 127 Grounding strap a sae com fao AA9 Rea video Input Line Filter B sade B6 889 Green video Input Line Filter C 6995 co B6 BB9 aive video Input Line Filter iz cuhwemangRs3ae 7 orien maaxxvrooxn TT NERTICPP1703 20 RCA namanarxo e h CRT CPP1707 277 RCA 6 25 7 h CRT cPP1708 27 RCA AGmAEGZSXOSCRT c h CRT cPP1711 14 Chunghwa M34AFA13x07 CRT R CRT CPP1717 20 RCA AaGAABSTXORCRT NERTICPP1721 36 RCA ASOAE 15x02CRT c NERTICPP1724 20 Chunghwa A8AGYISXETCRT v NERTICPP1725 19 Samsung ma5QcY 261x112 h CRT CPP1726 17 Chunghwa Ma1AGEI3K
80. 05 CPD1251 ES KK1 10mA 75V Diode IN4148 406 CPD1251 ES JJ 1 10mA 75V Diode 1N4148 207 019 5 JJ 1 10000 35 aw CF 407 CPRO146 E5 JJ 1 169 1 1 4W MF 207 CPROIS7IES 1 1 127K0 21 407 CPROISB ES 111 845 21 MF a07 cPRoor7 ES 111 36 35 CF 407 CPR0155 E5 JJ 1 68 1KQ 1 1 4W MF 207 CPROOIBIES J1 G2KO 35 CF 407 CPROI54 ES 111 44200 21 408 145 E5 JJ 3 15 8KO 1 1 4W MF 409 CPQ1301 D5 KKOJ60V PNP PN2907A 410 CPC1058 E5 GG2 1uF 5 50V Film a CPQ1303 D5 J 1 30 NPN PN2222A K 412 CPR0029 D5 JJ 0 200KQ 5 1 4W CF L 413 CPR0029 D5 0 200 0 5 1 AW CF K L 414 CPC1032 D6 112 OluF 25 50 Fim E 414 CPC1035 D6 112 3 300pF 5 100V Film L 1 415 11400 E6 KK3 H Contro IC La7851 416 CPR0502 E6 114 Horizontal Control A B Ic p JE fE s17 CPROL40 ES KK3 392Ko 21 vaw mr 418 CPRO140 E5 3 92 1 1 AW MF B c Io fe Ir 3 fK E 4194 050 5 002 Jumper Normal Vertical a te p JL _ ape BE u tate Ua 419E CPR0050 F5 002 02 J umper Reverse Vertical E 419F CPROOSO F5 NN2 09 J umper Reverse Vertical 420 CPQ1307 ES N3 15 180v NPN 25 4159 lel 420 CPQ1308 E5
81. 1112 631 JJ5 220uF 100V Electrolytic Tiss 03 onum wire rfe ler i 184 CPROO50 G3 j OO JumperWire A B fc p e Ir Tiss cPRooos G3 5 awe a Toole Ie Je HI wk 196 CPROO50 G3 J 00 wire A B fc p fe Ir J IK cPRooso Fa Jumper Wire A ee ole JF Je er 188 CPROO50 F3 00 Jumper Wire Ic pe Ir J K L Too CPRooIS FS NN 2k 25 iw cr o e Te Terao Jk c 190 CPROOSO F3 J 00 Wire fa fB fc p e fF IK L M fior CPRooso FS WN Jumper Wire A 192 CPROOSO F3 MM3 09 Jumper Wire A fB fc Io le E ie3 cPRooso Es MM3 Jumper wire Ik min 194 CPROOSO E3 09 Jumper Wire a fB lc o fe Ir J K L MN ies cPRoo3 E3 NN3 470 25 A Jelole 195 0050 J 00 Wire A fB lc o fe Ir J K L MN 196 CPD1252 E3 111 2 Diode 144007 196 PR 0004 02 25 van 65 00 _ EEE 196 LLO MIN 1968 LLO Ee Boi aan CLER ER EIER ERIS ER CERONIX XX93 Monitor Part List 50 A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B C
82. 12 conductor flat cable from the video board to the main board C Red high voltage wire from the flyback transformer to the picture tube anode cap Y oke cable from the yoke to the main board Remote cable from the remote control board to the main board M Note Be sure these wires are secured such that they do not touch any metal parts Plugin the LUE Signal ground Gray seven conductor 12V from monitor Red video video connector Horizontal sync Green video Vertical sync Blue video ISOLATION TRANSFORMER Plug in the power connector Mains B from the isolation transformer Power sat SSC ih po Ee Attached to the L GREEN YELLOW WIRE monitor chassis Apply power to the monitor and the drive electronics Check the focus and if necessary adjust the top control on the flyback transformer Adjust the controls on the remote control board for proper Horizontal Raster Size Vertical Raster Size Vertical Raster Position Horizontal Picture Position Video Gain For convergence instructions see page 100 amp 101 Instructions d installation des crans XX93 1 Un fusible fusion lente de 3 amp pour le courant du champ magn tique adjustement et un transformateur d isolation de 75 VA sont le minimum requis pour utiliser nos crans dans un produit 2 D baller cran Se r f rer aux instructions d installation foumies par le fabriquant 3 Installer cran dans son carter
83. 1KV Ceramic TA A A r ir r r r r Im Im N ELLiEEEEEE IEEE EE EEE EEEOEEIE EE 1 EE GALE ESI CER ES ER EDI ELE RED EAN E REI CERONIX XX93 Monitor Part List 49 CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA CPA4231 2793 VGA CPA4235 1493 CGA CPA4250 1793 SVGA CPA4166 2093 CGA CPA4254 2793 VGA CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA CPA4172 3693 CGA CPA4232 1493 SVGA CPA4255 1993 VGA CPA4227 2093 VGA ISO XFR 75W CPA4243 1793 VGA CPA4249 1993 SVGA CPA4108 2093 VGA ISO XFR 100W gt CPA4244 1793 VGA G H J K L CPA4256 1993 SVGA CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description 154 CPD1264 2 GG7 2A 600V Fast D 205 __ 155 1003 2 GG8 2 200pF 420 1KV Ceramic 156 CPD1264 2 GG9 2A 600V Fast D 205 __ 157 CPRO434 3 FF9 Posistor 230v 140 158 CPRO434 3 FF9 Posistor 230V 140 ise cPRo42e 3 FF9 Inrush Current Limit 1161 51758 3 9 093 Dia Bead Pin CC1 162 51758 3 093 Dia Bead Pin CC2 1624 51758 3 EE9 093 Dia Bead Pin CC3 1 163 1107 2 668 330 250V
84. 2 1493 SVGA J CPA4255 1993 VGA P CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA 150 XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description E IJK LM eee1en MainPCB 93 REV E8 001 CPROOSO A1 0o Jumpe Wire 002 51804 2 8 Cond Straight Header 004 CPROO06 C1 1 5100 5 1 4W CF 1005 0029 1 5 200 0 35 1 4W CF 006 CPD1251 C1 CC1 10mA 75V Diode 1 4148 006 CPRO006 C1 2 5100 5 1 4W CF CPQ1310 B1 NN5 1A 3007 PNP 25A1371AE CPROOI2 B1 117 27 25 cPRO134 Bi LL7 Lz1Ko 21 14W 009 CPR0136 B1 LL7 1 62 1 1 4W MF CPRO138 Bi LL7 215Ko 21 14W 009 CPROI40 B1 117 3 92KO 31 14w 010 1058 1 LL7 1uF 5 50V Film 011 CPR0018 A1 MM4 62K 45 1 4W 012 CPROOOS A1 EES 1KO 35 IMW CF 014 CPCII01 A2 FF5 100 50V Electrolytic 015 0050 82 J on Jumper Wire 017 0015 1 4 22 35 018 CPD1251 B1 FF5 10mA 75V Diode 184148 019 0050 NN4 00 Jumper 020 CPR0145 C2 5 15 8 1 1 4W MF 021 0006 2 5100 5 1 4W CF 022 0143 2 3 10002 21 14W
85. 2 THICK 18AWG MILD STEEL FINISH CLEAR ZINC COATING TOLERANCE 0 015 Except where noted DIMENSIONS IN INCHES Model ISO XFR 100W Specifications Electrical ja 50Hz to 60Hz Input output 1 24 Watts Maximum NoLoad 275pF input to output 3 000VAC input to output Output wired for 240VAC Environmental Operating temperature range is 20 C to 60 C Storage temperature range is 25 C to 70 C Operating humidity 20 to 80 Noncondensing Mechanical QUO Unit weight 5 9Lb 2 68Kg OO CC oro 0 200 DIA Holes on a 0 375 grid Enclosure dimensions 0 200 DIA Holes on a 0 375 grid 0 190 X 0 375 DIA HOLES e 0 020 gt 4 PL xc 600000 000000 000000 OOO OD 00000000000 OO 0 QUO CHOW JO XML GO QOO OOO OOO OD tQ LL LO DOO QU CHO UO XQ TEE ZU ETT X OOOO OO UO DI DD DO 210979 LOL UE OX 20 0 0 OGOOGO OG 2 00 00600 60000 lues Dia 0 003 MATERIAL 052 THICK 18AWG MILD STEEL FINISH CLEAR ZINC COATING TOLERANCE 0 015 Except where noted DIMENSIONS IN INCHES 0 200 DIA Holes on a 0 375 grid NOTE When box is placed on a flat the highest point shall not xceed 0 015
86. 2 2 983 E5 7 1 8K BIAS CONTROL LINE XX93 Video Board Technician s Assembly Drawing View is from component side K L P GREEN BLUE 936 C PRA 917 M Z 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 2 i 1 8K 933 E E B 7 LE 3BABE i B r e A Ter rer p pu 8 9 10111213 14 15 930 pu ll _ _ CA3224E 927 REIR 1 F 33K 910 12 13 14 15 16 17 18 19 20 21 22 823 air F EA d 905 lt air aa amp sA 883 BLUE K 2 1500 z 5W _ 882 AC 180 879 849 3 N 961 oon ana G2 m PCB 800 WIRE FOCUS LAN nn eure 12 10K CF 00 864 CERONIX 100 876 DW 873 00 865 4 Model XX93 E 7 1 8K 874 00 867 Video Board b C T K L N P 1211109 8 7 6 5 4 3 2 1 gt 5 5 gt 5 9 gt Note Common part values marked drawing LI os a oR The values for components marked with za ggg 96 cc 2 m GS the A delta can be found in the master te 45 5 E part list starting on page 45 0 XX93 Video Board Technician s Assembly Drawing View is from conductor side
87. 20 02 3 Lisi i2 Blooming 15 8K 15 8K 15 8K 10 lt correction Max Min 355 1560 CONTROL amp FAULT SENSE 4uS DELAY PN2222 AVDC 2ovoc VS 100K 12Vpp 38 7 nrush Current Limit ges 4708 1 2W CC Relay LEGEND 13350 New Airport Road 200V 5A BOARD PART No Auburn California 95602 5 CPRO0434 LTR No PART No ON PRA 9 Black Wire x x PRA PIN No SCALE NONE 4 10 96 E1 3 2499 5 9 SA gt a a lt ne 21892 9 30 96 4 03 06 0258 i Measurements 2 1 C 2 27Vpp 57 1 aretaken with i A j j j feno CPS G B d H 093 6 093 208 5 4 i n a white screen Vp p TP REF ze RON odel 2793 VGA M onitor Circuit 1782 VC GREEN BLUE VC VERTICAL VC HORIZONTAL Jao 222 CAUTION POWER SUPPLY VOLTAGES REFERENCED FROM V Hs 5uS div CERONIX 3 5 INPUT INPUTL6 sync 2 1 sync 7 PUT SCOPE GND MUST NOT BE CONNECTED TO GND AND V AT THE SAME TIME Vs 2mS div CPA4254 1 2 BB gt CC l DD gt EE 7 FF G HH MH NN 1 00 gt PR B Remote Connector m G 3 KAT 105 132 300 139 4937 141 62K 143A a POWER 15100 004L 11005 113 _ CN 144 E 0 p t 1371 KAA 7 x 00 533 1ER205 aae m Wire Tie 14
88. 3 SVGA R CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description E 427 51758 5 002 093 Dia Bead Pin 3 427 cPS17s9 F5 002 062 Dia Bead Pin YC2 428 CPR0365 F6 OO6 4700 5 1 2W CF 428 CPR0367 F 6 1500 5 1 2W CF 428 CPRO371 F6 OO6 1KO 5 1 2W CF 430 50 6 6 00 Jumper Wire 430 CPT1506 F6 005 H Linearity Inductor 430 CPT1539 F6 006 H Linearity indutor 430 CPT1546 F6 005 274 Inductor 430 1557 Fe 006 H Linearity nauar 1430 CPT1557 F6 005 H Linearity Inductor 3T 430 1566 6 006 H Linearity indutor 430 CPT1569 F6 005 H Linearity Inductor 431 1506 6 006 Linearity Inductor 431 1517 6 006 H Linearity indutor 431 CPT1539 F6 006 H Linearity indutor 431 1557 6 006 H Linearity indutor asi cPTi557 FO OO6 H Linearity indutor 431 CPT1565 F6 OO6 Linearity Inductor 431 1566 6 006 Linearityindudr 431 CPT1569 F6 OO6 Linearity Inductor 432 CPC1002 G6 330pF 10 500V Ceramic 1432 CPC1006 F6 OO6 200pF 10 IKV Ceramic 432 1026 66 06 1 000 5 100v Film 11433 1305 67 NN1 5A 1 5KV NPN 2501651 1 433 cPQ1318 G7 NN1 12A 1 5KV NPN 2505690 434
89. 333 Monitor Models 2 93 Safety Isolating Transformer Models ISO XFR 75W ISO XFR 100W SERVICE MANUAL OOD OOPYOOPVOOYOOYOOPVOOOOOOOOOOOOH 2 YEAR LIMITED WARRANTY This produc is warranted by CERONI X to be free of defects in material and workmanship for a period of two years from the date of purchase All parts and labor are free of charge during the warranty period This warranty does not cover mechanical breakage due to physical abuse It is the customer s responsibility for shipping the defective unit to and from CERONIX or one of the authorized service centers for repair Please attach a note describing the problem CERONIX Inc 13350 New Airport Road Auburn CA 95602 7419 Phone 530 886 6400 FAX 530 888 1065 WEB www ceronix com CERONIX shall not be liable for any consequential damages including without limitation damages resulting from loss of use QOOQOQOOCOOCOOCOOOCOOOOOOOOOOOOOOOOO OOOOQ OO QOOQOQOOCOOCOOCOOOOOOOOOOOCOOOOOOOOO OOOOOQO QQQOCOQQCQOCOQCOCOQCOQCOOCOCOOCOCOOOCOOOCOOO OO O OO Ceronix will repair XX93 monitors after the 2 year warranty for a minimal charge plus shipping to and from Ceronix PRODUCT SERVICE U S 150 9001 C Recognized under the Component Program of Underwriters Laboratories Inc the Canadian Standards Association and T V Product Service Compliance to the following Standards EC 60950 CAN CSA C22 2
90. 4W CF 880 CPRO351 L3 1 1500 10 jW CC 881 68 3 YY1 2 2KQ 35 IDW CF 882 CPRO351 L3 1 1500 10 1 2W CC se3 cPRoses L2 wwi azon 5 1 2 se3 cPRo3z1 L2 wwiko 35 12W CF 885 CPC1040 K3 556 015uF 10 250V Film 886 CPD1250 3 VVO 100mA 200V Diode F DH4OO A 887 1037 2 TT6 1uF 35 250V Film A Tess CPD1251 K2 VV6 10mA 75V Diode 14148 A 889 1003 1 2 6 2 200 20 1KV Ceramic A 890 cPROO09 K2 WW7 1KQ 5 A 1891 CPRO015 K2 VV6 22KO 5 CF 892 1101 12 YY5 10uF 50V Electrolytic 893 CPROOSO JE Y5 iour SOV 895 100 50V Electrolytic A L K KL KL NN KL KL A m Im E HERNE REES HERNE E B J E J J M L TE ELLELLLLELELBSELLRE 884 CPROOI2 K2 VV6 27KO 35 1 4W CF pe fr u IK PP QR S A B c G El EEE EB GE EEE I KIKI KIGE ESTER ES E SESS ES ESI ER SR ERES EI EIKI BIGI CERONIX XX93 Monitor Part List 61 A CPA4233 1493 CGA G CPA4247 1793 SVGA M CPA4112 2093 CGA S CPA4231 2793 VGA
91. 5 GAIN Master gain Video interface R The Horizontal Size Control circuit has four inputs SIGNAL FUNCTION 1 Horizontal size Horizontal size control 2 Beam current Blooming control 3 Vertical linear ramp 4 Vertical parabolic V linear ramp 44 48 Vertica SS Pincushion The horizontal size control circuit sums the four signals at one node plus the feedback from the diode modulator to drive a switching mode power driver The output of the power driver is then connected to the diode modulator through an inductor to complete the control loop The Diode Modulator is a series element of the horizontal tuned circuit It forms a node between GND and the normal yoke return circuit If this node is shorted to GND the result is maximum horizontal size Forward current in the diode modulator at the start of retrace keeps the node voltage clamped to ground until enough current flows from the horizontal tuned circuit to exceed this forward current The horizontal size therefore is controlled by controlling the current to this diode via the horizontal size control circuit A Voltage Doubler is used in the power supply for two reasons 1 Toimprove the efficiency of the power supply 2 Topermit 120 volt and 230 volt operation For the 230 volt operation the voltage doubler is replaced with a bridge r
92. 7 Gis 5 8K 408 AA am OR C a 0 234 N 31 3 66 lt N luF 410 a H itachi BWOO273 CPT1544 a 0 NS TNI 00 364 A CPCIO5B Nf x amp L 426 427 446 d ly j A AN 22M 3651 EH Yoke Connector 062 Pins 0 p acc LA B gt ES 5 385K 362 7851 cla 47 250 mi We 4148 270 si 2 415 54302 s Label W 4743 1 28138 ill 4148 271 127 361 ue o Ze Sg SW R 6 pe PN2907A EN S 8 ir c 443 5 188 SEE co RS LO KA adno lt N ov A LLI 8 3 283 00 358 IA Horizontal Control IB IC ID A d o AN Nn VS DNE Sn NZ E N IN OO E 7 ES E Im Ld 428 1 430 8 A AU PI memes BN a ken oe E 01 1 6KV SR SS 8 92K 356 Salt 4e P DE _ 473 V Label W H 103 J p AES er iE NI SINN eso 3 pu Nol S clo tes 2 2 9 E Ey CPT1517 012UF 1 6 or 2 5KV a me Pe R ta Gl PH amp 339 E 12 3K 359 ANSI 2793 15 7KHz Label W H123 J 6 8uF 100V IB ci 355 E ems B H LinCoil 9 b qs 5 29 N i 71 N ay Bie 18 lla o Tag 4007 333 F AA 431 We 022uF 630V 220UF jor Ov E 25 5690 433 43
93. 7 amp Zh VS wu ci e 306 C4159 AI u N TI mnn a R ze KAS Si xS St X SHa Drive 390 2 2K 5W 02 480 CPT1511 d og i ei a C A laik o 4 l 1 77812 296 PN2907A 2700 315 222 332 100uF Y oge MEN 00 295 1286 3951 ENDE eb 349 e 12007 435 457 A CPA4104 Hf 15 7kHz Vf 60Hz A C m J CRT AeSAEG25X05 CPP1708 V 126 128V DC 127 DC Hf 15 7kHz Vf 60Hz Video Board CPA4109 Video Positive Analog 0 00 1 00V Power 120VAC FF o O Model 2793 CGA 8 AA CC i EE FF GG HH JJ KK LL MM L Red Video Amp CT A Beam current Green Video Amp ee TO t Vertical Blue Video Amp Deflection Control i Slope 50 60Hz 1 Product safety note Components marked by the symbol on this schematic have special characteristics important to safety When replacing any of these components be sure to usethe parts specified in the parts list 26 5V 22 28V pp 25 F7 02 1 1N4007 Horizontal Drive DECREA
94. 7 Blueinput Blue comp gt sw in grid pls pos Green Green Video Amp BIAS 910 Red Video Amp 2 200pF TC 10 V Osc O S V osc o s or Delayed V osc o s V Blanking 15 Filament Pls FTTTTTTTTTTTTTTTTTTTTI 1 18 Bias active ABA Grid pulse 2 Program pulse Vertical 7 8 to 8 8 9 64 12V 2 7 13 Blanking Grid pulse 1 8K 4 2Vp p 360uS MPS2907 PROGRAMI 12 1 8K ee 45V to 27V gt Monitor Block Diagram Review On Video Board G2 290V 2 For Dual Focus Gl 20V VIDEO VIDEO Beam i Interface AMPS Current Bias Feedback BLANKING Auto Bright MDC EHT 25KV F B P V retrace Beam limit M gain High temp limit CRT AUTO BIAS IC H sync FBP VERTICAL OV sync SYNC CA3224E JI DELAY Dynamic F ocus used only on Dual Focus CRTs Horizontal Dynamic VERTICAL F ocus VERTICAL CONTROL amp OSCILLATOR OUTPUT LA7851 LA7838 V Feedback LA7851 HORIZONTAL CONTROL Sync delay V Ras Pos REMOTE HORIZONTAL kali Size Control Modulator Beam Current 52V to 129V ISOLATION LOAD VIDEO amp DEFLECTION Transformer UN SAND SWITCHING 16V 12V REGULATOR 424 27V Shutdown Sync Vertical Deflection Supply DEGAUSSING TE FBP CIRCUIT DETECTOR PROTECT BLANKING MASTER GAIN AND FAULT CIRCUIT FUNCTION DESCRIPTION
95. 9 CPR0010 B5 5 4 7 5 1 4W CF 239 CPROO13 B5 AAS 6 8KO 45 1 4W CF 240 CPR0050 B5 J on umperWire 241 cPi1409 B5 BB6 Video Input IC XRC5346A _ 242 0141 4 6 4 42 0 31 MF 242 CPRO124 Ba CC7 12 1K0 196 14W 242 cPROI45 B4 CC7 15 8K0 21 140 MF 242 CPR0153 B4 CC7 20 0K 2 1 1 4W MF 243 CPD1252 B5 BB7 1A IKV Diode 1N4007 243 0 5 BB7 220 35 UAW MF 243 CPR0003 B5 7 4 72 45 1 4W CF 243 CPROO50 B5 BB7 00 Jumper Wire 1243 129 5 BB7 3400 21 yaw MF III 244 cPROIZ2 BS 5 1050 31 I AW MF 244 CPR0132 B5 5 6040 1 1 4W MF 245 CPROI32 C5 5 6040 1 1 AW ME 245 cPROI34 CS 5 1 21 0 1 1 4W 246 CPRO009 C5 7 1 5 1 4W CF 246 cPROO29 CS 7 200 0 25 WW CF 247 CPROO16 C5 FF8 33KO 3596 1 4W CF 248 CPROO11 C5 Cc3 1 8Ko 35 UAW CF 250 CPR0013 C5 CC3 6 8K O 5 1 4W CF 251 CPROO13 C5 68 15 UAW CF 252 CPROO11 C5 4 1 8 35 L AW CF 253 CPD1251 D5 CC3 10mA 75V Diode 1N4148 254 CPC1036 C5 FF8 047uF 45 50V Film 254 1 03 5 FF8 30V 6A NPN PN2222A 255 CPQ1303 C5 FF7 30V 6A NPN PN2222A 256 CPR0029 C5 FF8 200KQ 5 1 4W CF 257 CPROO19 C5 FF8 100KO 35 1 4 257 cPRoon cs
96. 9192 1S S N O O JO JO JO O O JO JR O IND JO JO O ID O IO O JO O 00 SIIN 00 00 IN IN IN oo joo joo JH JO ro N O 2 NO Oo 2 O iT SIR OT N BR IM CERONIX XX93 Monitor Part List 60 CPA4244 1793 VGA CPA4256 1993 SVGA CPA4104 2793 CGA A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B CPA4235 1493 CGA H CPA4250 1793 SVGA CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA CPA4232 1493 SVGA J CPA4255 1993 VGA CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA W 150 XFR 100W F L Vertical Deflection Booster A Bd Part No Bd Sch Ref Description 1854 CPC1076 N3 XX1 0 1UF 35 200V Film 855 CPRO371 N4 xxi iKo 35 I2W CF 856 CPRO366 N4 YYI 100KO 25 V2W CF 1857 CPC1034 N3 WW2 022uF 3 630V Film 857 CPC1037 N3WW 2 luF 45 250V Film 1857 CPC1040 N3 WW2 015uF 210 250V Film 857 CPC1046 N3 WW2 047uF 5 200V Film 1857 CPC1052 N3 WW2 018uF 5 200V Film 857 CPC1074 N3 WW2 068uF 5 200V Film 858 019 3 100 35 14w CF 858 CP
97. A BC EF GH IJK S TUVWX Com PRICE 503 0151 64 004 73 1 AW MF HH P j rj NEHEENN 1503 cPRozse ca Oo4 B45Ko 21 yaw MF E MERTEK 504 CPR0147 G4 004 1 00MQ 1 1 AW MF ES 505 cenoot7 e4 o04 3eka 35 AW MF E 505 0018 64 OO4 62KO 5 E crams cod SUNG Li 507 CPC1003 G4 P G E Zz 507 CPC1057 c4 P E 508 CPRO050 G5 B C G N 509 1308 64 E G T510 cPRoo34 GS O 511 CPRoos4 GS O esp Gal PP3 1 G5 J 64 004 65 004 22 35 UAW CK 65 4 2 2 25 14W CF 512 cepta os ikv Diode 1Na007 _ T512 CPD12xXG5 PP4 1 2007 BYD33U Diode 514 CPRO029 G5 004 200 0 5 1 AW CF 515 1002 5 330pF 210 500V Ceramic 515 cPc100 Hs PPa 1 000pF 106 500V Ceramic O 517 1037 6 005 1uF 45 250V Film 517 1068 6 005 01uF 5 aoov Film ets crrisse e Pa oyeniercus Transtar 1520 CPro352 5 1 4700 3109 U2W CC 521 4 on jumper wire F sz2 cPRoOSO 4 J 09 JumperWire EEXRLCDNNESTIT _ 524 CPROOSO H4 PP2 00 Jumper Wire 525 CPROO50 H4 PP2 00 J Wire 526 0050 4 0o umperWire 529 CPRO169 E 1 GG6 191 1
98. A7R NERTICPP1727 17 Samsung 761x172 CRT h CRT CPP1728 27 Samsung mesgcras xon2orT _ Ters es 17 Groundingstrap CPS1846 36 GroundingStrap DD9 CSyncPin 1 amp 2 of Conn 292 n n n iD M N P B5 BBS n D5 KK1 Vert D5 1 Vert De 664 AAT Vi A Sade Cmn 851 7 i CPM2024 2025 Rear Support Braket mE j mE IR IR IR 559 Front Support Bracket Right Support Bracket 5 0 1 Video Analog Green Gain CPM255 Video Analog Blue Gain DD8 Reverse Hs AC Video Clamp sade Com AS AAS Video Analog Blue Offset 06 i IS IT HEN HEN Video Analog Red Gain CERONIX XX93 Monitor Part List 63 CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA CPA4235 1493 CGA H CPA4250 1793 SVGA CPA4166 2093 CGA T CPA4254 2793 CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA J V K W L CPA4252 1493 SVGA CPA4255 1993 VGA CPA4227 2093 VGA ISO XFR 75W CPA4108 2093 VGA ISO XFR 100W CPA4104 2793 CGA Vertical Deflection Booster CPA4243 1793 VGA CPA4244 1793 VGA A Bd Part No Bd Sch Ref Description N O P Q R E Cmn a2 nN 7 Verene Parabolic incon Range
99. Bu 1 20 4 7 a Nh NW 7 3 057 im S a IM m CS _ 4 6 340 i O27uF 800 CPT1528 RP our vr en Fr z i 441 4231 31 5 Model 2793 VGA Vf 60Hz 35 GD AA CC EE FF HH JJ KK LL MM NN OO PP Auto Bias Vsyne ABA CPT1505 5 5 6 4V L3Vo 2125 amp svocTvs ESET 1 4Vpp 22 E5 INCREASES A TOP AND SOCKET BOARD CONNECTOR TC Si d BOTTOM VERT SIZE V i 62K 62K osition E ak 2 Fr Sala F 50Vpp 29 F6 gs E i Beam current Fil Red Video Amp Product safety note Components marked by the symbol on this schematic have special characteristics important to safety Fil Rtn 7222 When replacing any of these components be sure to use the parts specified in the parts list ei Screen Beam current gany P P P eM 2 FOCUS 0 Green Video Amp ee AGBQCP891X002 le JEE CRT LA7838 Vertical Linearity Circuit 1 EHT Vertical Blue Video Amp Deflection 1 EHE ES BOTTOM L VERT SIZE AN FLYBACK E Boost ur 12 18VodHs Horizontal Drive i o sis ba 1 pm 133Vppl26 E7 Transformer JON KIER i TC9 iB OFF 2 200uF 25V 3 5Vpp 31 F5 ey aa VERTICAL Ret Boost 556 5V VS Es DEFLECTION etrac
100. CIRCUIT FUNCTION DESCRIPTION amp Analog The video interface circuit is a general purpose RGB typeinput circuit This circuit connects the external video signal tothe video amplifiers It can accept DC or AC coupled positive going analog negative going analog and 4 line TTL The particular mode of operation is selected by inserting jumpers different value components and solder bridges The Production Assembly Drawings PADs are given the appendix which describe the component differences SIMPLIFIED VIDEO INTERFACE CIRCUIT Black Level 5 6V 1 NEGATIVE GOING ANALOG MODE AN Saturated Color 1V RED channel shown 16 VIDEO AMPS 7 5V BIAS LINE 3 5V a M Blue channelonly 6 GAIN amp INPUT 3010 3400 2 99V C5346 BLANKING M Analog Black Level A BL 239 G For the blue channel only 1596 of the output current is subtracted by resistor 239 Signal sources with 8 bit drivers that use 2 bits for the blue channel usethis 1596 offset To prevent input line ringing from exceeding the saturated color voltage limit a clamp diode has been added In the negative analog mode the video signal has a black level 5 6V which is the A BL voltage The saturated color is thelowest input voltage 9V 1 1V Thecurrent amplitude to the video amplifiers is defined by resistors amp and the master gain voltage Saturated Color 70V 2 POSITIVE GOING ANAL
101. CIRCUIT DESCRIPTION M odel 1793 31 5DF FLYBACK Horizontal Drive TRANSFORMER Transformer CPT1505 2 332 cc 520 White Wire Screen Grid FOCUS 2FOCUS Z z screeEN 4 ELLE 12 Dynamic Focus GND 1 5 p Beam Current VERTICAL Sene DE 7 V Filament CPT1555 GND V 2 200pF 1N4007 1KV 3 5Vpp 31 E5 en 22MO 2 2MO HORIZONTAL YOKE DE 204 1 CPT1556 2 2SC3467 Horizontal 33uF 1KO gt 514 0 1uF Linearity 8 E 250V Width coils 500 AA 47uF UF 1 20 1w 09 191K 36K 6KV 385 202 503 505 71 Horizontal Width Control Diode Modulator The dual focus CRTs require a waveform on the 2 focus grid This voltage waveform is dependent on the position of the beam on the CRT The lowest voltage part of the waveform is in the center of the screen and the highest voltage part of the waveform is at the corners of the screen The dynamic focus circuit produces a composite waveform which consists of the horizontal parabolic waveform and the vertical parabolic waveform This composite waveform is applied to the dynamic focus input of the flyback transformer and produces a sharp picture on the dual focus picturetubes Typically dual focus picture tubes produces a sharper picture than the single focus picture tubes Dynamic F ocus Circuit Operation The v
102. Current Limit el 4709 1 2 m 470 Relay LEGEND 13350 New Airport Road 200V 5A E m BOARD PART No Auburn California 95602 5 0434 3AFuse A LTR No PART No ON PRA 9 a AE hie seme NONE anno masse pecu e OO OSS CNN Terme DRAWNBY 2 18 92 9 30 96 4 OS O6 02 E8 Measurements Y V USING A DMM SE V or H SYNC AET cue avar CERONIX Model 2793 VGA Monitor Circuit VC HORIZONTAL 4 o p ya 154 A R x0 OPS VS EUIS Peakto Peak i 5 VC RED vc 1752 VC GREEN BLUE VC VERTICAL el lve Or meer 5 230VAC Pu JA AUTIO POWER SUPPLY VOLTAGES REFERENCED FROM V Hs 5uSidiv WAVEFORM Measured with scope GERONIX 4 INPUT L3 5 INPUT _INPUTL amp SYNC 2 1 SYNC A i n 7 SCOPE GND MUST NOT BE CONNECTED GND AND V AT THE SAME TIME Vs 2mS div Partno CPA4231 E A C34 DD EE FF GG l HH 11 JJ KK NN L gt G H
103. I tim LOB T aS 122 123 Isolation Transformer Trouble 5 10 124 Isolation Transformer 125 Manual Voltage Select Schematic and Assembly 126 Part List A AASA GUM riskita nik ker kr o PD a en 127 130 Monitor Simplified Block Diagram VIDEO VIDEO Output Interface Drive Electronics VIDEO Amps Pe Blanking AUTO BIAS SYNC Output Vertical Deflection H OO A gt Horizontal Deflection Remote Horizontal Size Mm Controls Control 9 Detection sol ated Power POWER SUPPLY This block diagram gives a broad view of the circuit organization of the 1493 1793 1993 2093 2793 and 3693 monitors The blocks with the bold outline represent circuits which provide these monitors with a wide range of operating conditions without the need for adjustment The video interface circuit be programmed to accept Analog AC or DC coupled Analog and 4 line TTL The M GAIN or contrast control is located on the remote control board The auto bias circuit eliminates the need for the color setup procedure This circuit is designed to actively compensate for picture tube drift which normally causes unbalanced color The auto bias circuit also ad
104. Ik 73V BIk 75V BIk 77V 1 0V Black level Blk 02V BIK40 00M BIk 02V Video Saturated color Bik 98V BIk 1 00VIiBIk 1 02 AC voltages are referenced totheR G amp B video input voltage during horizontal sync Hs Blank is the black level voltage during Hs C Negative Analog Red amp Green Black level Blk 4 7 V Blue Black level 4 85V 5 05V 5 25V Monitor Saturated color D 4LineTTL also available Black leve Color on Low intensity Full intensity No pullup i on intensity line Note RS170 and other voltage combinations optional for analog video CERONIX XX93 Monitor Electrical Specification 2 TheSync signals may be of either polarity and separate or composite Sync Source High input voltage Low input voltage Horizontal sync pulse Vertical sync pulse Horizontal frequencies Custom horizontal frequencies from 15K Hz to 39KHz are available upon request Monitor For composite sync vertical and horizontal sync lines are connected together Vertical frequencies 3 The Power to the monitor is to be supplied by a secondary winding of an isolation transformer Max 145VAC 120VAC 50Hz or 60Hz 230VAC 50HZ or 60Hz Power 120VAC 50Hz or 60Hz 230VAC 50HZ or 60Hz Power CERONIX XX93 Monitor Electrical Specification 4 Five Controls are located on a separate PCB for easy access Horizontal raster size Vertical raster size V RAS POS Vertical raster posit
105. JAUNE du moniteur 8 Amener le courant cran et au disque lectronique 9 V rifier lefoyer et si n cessaire r gler le contr le sur le retour du transformateur 10 Effectuer les r glages sur la carte de la commande distance pour La taille du balayage horizontal La taille du balayage vertical La position du balayage fertical La position horizontale de image acquisition video 11 Pour les instructions de convergence voir page 100 amp 101 C3 10 11 Installationsanweisungen f r die XX93 Monitore Ein 3 Ampere T sicherung f r die degaussing Str mung und ein 75 VA Isoliertransformator ist die Minimum F orderung f r benutzen unseren Monitoren in einem Produkt Packen Sie den Monitor aus Schlie en Sie den Monitor F r Details Folgen Sie den Installation Anweisungen im Gehause an Vom Lieferanten der Antriebelektronik Verbinden Sie den Gr ne Gelben Schutzleiter zum Erdung anschlu auf dem Gehause Dieser Draht ist verbunden zur der Erdung Schraube auf dem Monitor Chassis und wird hinter der Serien N ummer Aufschrift gefunden Unterlassen dieser Verbindung dieses Erdung Drahts ist WARNUNG gesetze widrig Der Wider tand von diesem anschlu biz zum netzstecker darf 100m2 nicht berschreiten Pr fe da die folgenden Dr hte ordentlich verbunden sind A Gr ne Draht vom CRT aguadag zum Video Schaltpult 12 Leiter Flachkabel vom Videoschaltpult zum Hauptschaltpult Rote hochspa
106. K 364 9e cPC1058 FE x 426 42 446 b dms T gt 00 236 JL all ci 3 LA7851 E x st E amp 2 7 E III 7 Pin N 4148 270 9 259 1365K 362 m Ei alo Ew 4 56uF 200V 444 OR gt GINE ME JA 2 Conn 5 28 i A 4 1188 5855 EX 00 3 IN co i 358 Horizontal Control IB IC ID 416 SW ie mE A DER 516 f m B VR RI r i GIR 1 PRA 428 p kh N 2 re 6 ae Ee 357 Case ps jl dix S ELR i ner d es We A if we MM Io Sl oa ae ZE pen 0 9 2 D 2 8 ZEE le ee mer E 5 345 BI ch IN 230 LM339 AN 1557 tA LO 4700 1000 s 6 355 5 aK S29 ONS Tune p 1 LLL ETAIP EIE C T 27K 336b 9 e 9 5 he exe oe Ges less ee Bm Ir ar Ama N xA Nase rn O 28C5690 433 MINUM 437 GE lt Deore b 306 64158 d 4 B EX n un e eel ey Gi E TNI l 475 436 303 A co 65 Km N me 3 J 1 0K 5W 02 480 ER mis Mme E e CPT1505 341 N mE _ e BEER b e 332 TA E IN T
107. N2 J 02 JumperWire E Tera 2 on umperWire 815 CPC1003 N2 VV5 2 200pF 32096 1KV Ceramic 816 CPC1058 N2 YY2 1uF 5 50V Film 817 CPC1058 N1 UU2 1uF 5 50V Film 818 1003 2 VV5 2 200pF 32096 1KV Ceramic 1820 CPROOSO P2 J 00 821 ePRoosojP2 00 822 1 2 554 60 6A PNP PN2907A 823 1037 2 TT3 1ur 35 250V Film 824 1040 2 553 015 210 250V Film 825 0127 2 554 2050 31 UAW MF 826 CPROO50 P2 J O0O JumperWire 827 1301 2 553 60 PNP 29074 828 1309 2 553 200V PNP 2SA1370AE 830 CPROO11 P2 4 1 8 5 1 4W CF s31 cPRooni N2 TT2 1 8K0 15 832 1301 2 SSO 60V 6A PNP PN2907A 833 1309 2 SSO 1A 200V PNP 2SA1370AE 834 CPRO127 N2 551 2050 1 1 AW MF 835 CPD1250 N3 UUO 100mA 200V Diode 400 836 11 3 TT1 1 8Ko 35 CF 837 1309 2 TT2 1A 200V PNP 2SA1370AE 838 CPC1005 N3 1 000pF 10 5007 Ceramic 840 CPD1250 N3 TT1 100mA 200V Diode FDH400 841 CPD1250 P3 TTA 100mA 200V Diode FDH400 842 CPQ1309 P2 200V PNP 2SA1370AE 843 CPC1005 1 000pF 10 5007 Ceramic 844 CPROO11 P3 TT4 1 8K9 35 1 4W CF 845 C
108. OG MODE Black Level OV 12V RED channel shown 16 VIDEO 7 5V BIAS LINE AMPS 15 8K 11 RED 2700 15KHz VIDEO 759 31KHz INPUT 2 O 11V or 12V MASTER GAIN amp BLANKING 12 5346 1 black level voltage is set by resistor di vider amp to compensate for the bias current voltage drop An optional variable black level is accomplished with the In the positive analog mode a bias current of 6mA flows to the input pin 2 This current is set by resistor at the Analog Enable input pin 11 The 6mA produces a voltage across the parallel resistance of the game and plus resistor 278 at pin 2 Ifthe external source resistance is 75 ohms the black level voltage at pin 2 is 18V for 15K Hz and 07V for the 31K Hz black level adjustment pot The input termination resistor reduces video line ringing and produces a dark screen when the video input connector is disconnected The normal saturated color is set at 70 volts Higher saturated color levels can be accommodated with resistor or gain changes 5 6V to 1 1V NEGATIVE ANALOG DC COUPLED VIDEO INTERFACE CIRCUIT DESCRIPTION Red Video Amp F ai Green Video Amp all hod Blue Video 14 SET SOCKET BOARD 56V 28 03 500 TC11 Filament TC12 Fil Ret ARC PROTECT u 127V TC8 Auto ABA Bright TC7 Red TC 10 TC 6 5 Green End Vertical Blanking TC 3 Blue E Vertical O
109. Output _ zz OORG sii Black OBLU 6 27 O GRY Connect ORG to RED for 517 OBRN Blu Ina SLOW BLOW FUSE 2008 503 1721 2008 PTZ N 33K 504 365K 505 24V DPDT Relay 518 CPR0431 250V 127K 509 Fuse 507 508 5 A 0 1 5 400V m 510 512 4007 511 72 10 1W 519 O O WHT 520 BLK ISO XFR 75W ISO XFR 100W Assembly Drawing Stromkreisfunktion Beschreibung Die grundlegende Funktion des XFR75W und des XFR100W ist die Zeile Energie f r die ben tigenden Monitoren und Lokalisierung Transformator zu lokalisieren Der Transformator wird entworfen um einen niedrigen Durchsickernflusswert zu haben der erlaubt da er nah an der CRT eingehangen wird T vollenden den niedrigen Durchsickernflu hat der Transformator zwei Sets der Prim r und Sekund rspulen die an einem ge nderten Ringk rperartkern eingehangen werden Der ideale Transformator w rde ein Ringk rper sein aber diese Art des Transformators ist kostspieliges becuase zu wickeln das ist schwierig Ein Relais wird benutzt um die zwei Prim rspulen in den Serien oder in der hnlichkeit anzuschlie en um Spannungen der Zeile anzupassen 240VAC oder 120VAC Bevor Energie angewendet wird schlie t das Relais die Transformatorprim rwicklungen in den Serien an um berm igen Prim rstrom f r den Fall 240VAC zu vermeiden Der Steuerstromkreis versorgt das Relais mit Energie wenn die Zeile Spannung 120VAC ist
110. PA4235 1493 CGA H CPA4250 1793 SVGA N CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA CPA4252 1493 SVGA J 4255 1993 VGA P CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA 4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA R CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description E 197 CPQ1307 E3 11 0 1 5 180V NPN 25 4159 A TL 197 CPROOSO E3 LLO 02 Jumper 0 600 Long E BN 198 CPROO33 D3 300 5596 IAW CF 1984 CPD1264 D3 JJ 5 2A 600V Fast D FR205 F 1984 0050 03 JJ 5 02 Jumper Wire 199 CPD1252 D3 LLO 1A IKV Diode IN4007 200 050 03 00 Wire 201 CPR0029 D3 BB2 200KQ 5 1 4W CF 202 050 03 FF3 00 Jumper Wire 203 CPR0050 D3 FFI 00 Jumper Wire 204 050 03 J 00 Jumper Wire 206 CPS1757 C4 12 Cond Straight Header 207 1036 4 CC4 047uF 35 50 Film 208 CPROO09 D4 CC3 1KO 35 LAW CF 209 CPC1102 C4 DD2 100uF 25V Electrolytic 210 11410 C4 CC3 Dual Comp IC LM393N 211 050 00 Wire 212 01301 4 60 GA PNP PN2907A 213 CPD1250 B4 AA5 100 200V Diode FDH400 214 CPR0050 Ca J 09 JumperW
111. PD1250 P3 VVO 100 200V Diode 400 846 CPC1043 P3 XX2 luF 35 50V Film 847 CPD1253 P3 ww2 1A 600v Fast D 1N4937 848 CPD1252 P3 WW2 1A IKV Diode 144007 849 CPD1250 P3 vvo 100mA 200V Diode 400 850 1306 3 223 L5KV NPN 25 3675 851 0365 3 4 0 4700 15 QW CF 851 CPRO371 N3 WWO 1 5 1 2W CF 852 CPR0018 N3 773 62K Q 45 1 4W 1853 CPC1034 N3 XX1 022uF 43 630V Film 853 CPC1035 N3 XX1 3300pF 25 1007 Film 853 CPC1038 N3 XX1 068uF 5 100V Film 853 1040 3 XX1 015uF 10 250V Film 853 CPC1047 N3 XX1 027uF 3 800V Film 853 CPC1058 N3 XX1 1uF 5 50V Film 853 CPC1068 N3 XX1 0luF 3596 400v Film J DI 11854 cPC1026 N3 xx1 1 000pF 5 100v Film III 11854 CPC1027 N3 XX1 6 800pF 5 100V Film 1 854 CPC1035 N3 XX1 3 300pF 25 100V Film 854 CPC1038 N3 XX1 068uF 5 100V Film Eee E H H H H H H H H HI H H 854 cPc1041 N3 Xx1 033uF 25 SOV Film 854 CPC146 N3 XX1 047uF 25 200V Film 854 2052 3 018 35 200v Film 1854 CPC1054 039uF 5 100V Film 1854 CPC1067 N3 XX1 56uF 5 100V Film 854 CPC1073 N3 1 0 033 5 200V Film JEE Ss SESS SEESMISE EEE eere gt 19 9191919919199 S1919 1912 27919772 1712 PEIPSI TEIE 918 919
112. RO146 P3 169 1 1 4W MF 858 CPROI70 P3 vv3 294Ko 21 yaw MF 859 CPROO32 4 YY2 300 45 1 4W CF Hairpin 80 CPC1106 P3 xx2 10uF 200v Electrolytic 861 0050 3 J OO JumperWire 862 050 4 J Jumper Wire 863 CPS1772 P4 223 12 Cond Video Cable 12 863 CPS1849 Pal 223 12 Cond Video Cable 177 864 CPROOS0 P4 J 00 865 050 4 J Jumperwrre 866 0009 4 YY3 1KO 5 1 4W CF 867 050 4 1 on JumperWire 868 1101 4 2 10 50V Electrolytic 868 1110 4 vV2 100uF 50 Electrolytic 869 0050 3 1 00 Jumper Wire 870 CPD1250 N4 vv2 100ma 200V Diode FDH400 1871 CPC1002 4 330pF 10 500V Ceramic 872 04 4 Vv2 2700 35 14W CF 872 CPROO11 M4 2 1 8 45 1 4W CF 872 024 4 Vv2 33Ko 25 LAW CF 872 cpro1a1 md 2 4 42 0 31 AW MF 872 CPRO143 M4 VV2 10 0K 2 1 1 4W MF 1873 CPROS70 M4WWI 10KO 5 M2W CF 874 011 4 vvi isKo 35 vaw cr 875 JCPROSSIIL Al 2 1500 440 TON JA 876 CPROO19 LA VV1 100K 5 1 4W CF afer cessso L3 Xxo Dual Focus CRT Sos 877 CPS1852 L3 XXO SingleFocus CRT Soket 878 CPC1003 L3 2 200 320 1KV Ceramic 879 CPR0002 L3 2 180 5 1
113. RT surface Phosphor P22 32 CERONIX Refer to the block diagram on page 15 foldout when reading this description The Video Interface is designed around a custom IC and will accept DC or AC coupled positive analog video signals It can also be used with negative analog and 4 line TTL This IC has a built in multiplier circuit for the master gain control and blanking functions Resistors are used to protect the IC and to set the gain The programmed gain is dependent on the input signal amplitude except with the TTL mode Solder jumpers and component substations are used to program the Video Interface for the type of input signal to be received The output of the drives the video amplifiers This drive is a current where MA is black and 10 mA is a saturated color The Video Amplifiers are of the push pull type They are built partly on thick films and partly on the video PCB Spreading out the amplifier reduces the component heat and improves the life of the unit The bandwidth is 25 MHz with 40V p p output Therise and fall times are 20nS The Beam Current F eedback circuit directs most of the beam current of each amplifier to the beam current buffer The only time this current is measured by the auto bias circuit is during the time of the three faint lines at the top of the screen and three lines thereafter The CRT auto bias circuit is designed to adjust the video amplifier bias voltage such that the beam current of each of the t
114. Ref Description E Q 37 CPD1251 C7 EE7 10mA 75V Diode 144148 BERATEN 318 1036 6 FF8 o47uF 35 50V Film a 318 CPR0050 C6 00 Jumper Wire A LK E KEK KE Tea x 319 CPD1251 C6 EE7 1074 75V Diode 1 4148 BESSERES E 1320 CpRoo12 C7 7 2 7 0 15 UAW CF 321 Cproo13 C7 EEB 6 8Ko 15 UAW CF ISIN a 322 CPR0013 C7 EE8 6 8KO 5 1 4W CF Q 323 Cproo15 C7 8 22 0 35 1 4W CF a 324 CPR0050 C7 J 02 JumperWire 325 Cproo11 C7 DDs 1 8Ko 5 UAW CF ISIN a 326 CPR0004 D7 DD8 2700 5 1 4W CF Hfi Q 327 CPR0004 D7 2700 35 1 4W CF ISIN 328 CPR0050 D7 009 00 Jumper Wire Q 1325 CPRo144 De 4 121 0 1 1 4W ahi IK IL 330 CPRO004 27 009 2700 3596 1 4W CF s31 cPRoon D7 DD9 iSKo 5 UAW CF a 11332 CPT1505 7 1 Horizontal Drive Transformer 333 CPD1252 De 1 IKV Diode 1N4007 Ja a 334 CPC1103 E6 FF4 220uF 50V Electrolytic Q 336 012 6 4 2 7 0 35 UAW CF a 336 CPROO24 EG KK4 3 3KO 3596 1 4W CF Le TK TA j i 336 50 6 00 Jumper Wire III 336 CPROI34 E6 1 21 0 1 IAW MF x 336 cPROI38 EG KK4 215Ko 31 1 4W E 337 CPQ1307 7 MM 1
115. SES TOP AND BOTTOM VERT SIZE FLYBACK TRANSFORMER LL se EE 29 33Vpp 26 E7 Transformer 4 5 2 251617 8 9 10 r 13 CPT1505 Auto Bias m 5 5 6 5V Vs Vsyne ABA di 3Vpp 21 05 1 4 23 1 4 22 5 INGAEASES L azour 301007 n ee u 385 Er 1 Raster Position 12 18Vpd Vs 50Vpp 29 F6 HE EA 401 2 CPT1516 253 E 00 112 18voc Vs 426 3 5Vpp 31 F5 VERTICAL Retrace Boost 1 3vcDlvs 4 5 5 3VTVs 427 i DEF KE O 9 6 1 3VCD Vs 14 5 5 3 Vs 3 Remote Control 1 2 19 05 B8voplig bsj gt 88 17 5 16 5 02 2803467 Horizontal Raster Adj PCB 490 V RAS POS 1500 1 2W VERTICAL BLANKING PN2907A 25 64 2700 RricAL vertical VERTICAL F 00 V VERTICAL VERTICAL VERTICAL 1N4148 SYNCINPUT OSCILLATOR OSC O S s fum i EL ul Horizontal POSITION SYNC INPUT _ O S HORIZONTAL OSCILLATOR DISCHARGE 4 VDC 423 sr HORIZONTAL BLANKING 7 3VDC 5 5Vpp 01 D6 116 115 15 8K High Temperature Or 4 3 3nFf 110 1600Hz1 800Hz 037 Excessive Beam 4 Current
116. SITIVE ANALOG AC COUPLED VIDEO INTERFACE CIRCUIT DESCRIPTION 16 13 9 6 11 10 3 A EN ABL Controls XRC5346A VC RED VC VCIGREEN 4 INPUT 5 INPUT In the analog AC coupled mode the video black level is set by a clamp circuit which is active during the first part of horizontal sync For this circuit to work properly the incoming video must be at the black level voltage when horizontal sync starts and remain blanked for at least 4 5uS The damp circuit is dependent on the polarity of incoming horizontal sync For separate horizontal sync the sync polarity should be positive For composite sync and positive going horizontal sync pulses resistor 320 30 long is connected to the inverting horizontal sync comparator which is the same as separate positive horizontal sync For composite sync with negative going horizontal sync pulses resistor 45 long makes the connection to the noninverting vertical sync comparator This connection is valid sincethe horizontal and vertical synclines are connected together for composite sync The damping function is accomplished by turning on transistor at the start of horizontal sync through the differentiating action of capacitor and resistors amp 320 The collector of this transistor is connected to clamp transistors 311 amp through resistors amp with pull down resistor 315 Thecoupling capacitors amp at the video input are set tothe black level volt
117. SVGA 4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA R CPA4104 2793 CGA Vertical Deflection Booster A Bd Part No Bd Sch Ref Description E 113 0019 01 HH6 100KO 5 1 4W CF E u4 cPRooso Ei HHS 0Q umper Wire 1144 50101 HH6 OO Jumper Wire 115 EP11403 2 117 PS Control XRCS184 116 01252 2 719 1A 1N4007 uz cPRooso E3 on Jumper Wire 118 11021 2 115 100UF 25V Electrolytic 119 cPc1104 E 3 MM Q 1 000uF 35V Electrolytic 120 CPC1102 E2 115 100uF 25V Electrolytic iz1 CPD1253 F2 116 2 600V Fast D 144937 122 cPD1253 F2 116 1A 600V Fast D 144937 123 cPC1002 F2 HH9 330pF 109 500V Ceramic 1123 1006 2 HH9 200pF 10 IKV Ceramic 124 CPC1058 E2 JJ 7 1uF 5 50V Film 125 CPC1035 F2 3 300 5 100V Film 126 CPROIS6 E2 7 931 0 41 1 44 MF 1 126 CPROIS7 E2 KK 7 127K0 31 LAW MF 126 CPRO171 E2 7 365 1 1 4W MF 1 126 CPROI72 E2 7 140 0 31 14W 126 CPROI74 E2 KK7 z10K0 21 14W 1 126 CPRO176 E2 KK7 226K 31 040 MF 126 CPR0146 E2 KK 7 169K2 1 1 4W MF 1 126 CPROIS9 E2 KK7 191KO 21 14W MF 127 1302 2 119 30 PNP D MPSAGA 128 1103 2 HH9 220uF 50 Electrolytic A 129 1009 61 KK
118. T PN2222 BEAM CURRENT vy TUF GND 750 100uF 035 CIRCUIT 00 Temperature 1 22K Sensor Power supply controller IC 033 017 2SA1371 Excessive beam current or SUN GND C5184 ovp 14 high temperature comparator 02 200K cU 115 15 Shutdown GT VERTICAL AND HORIZONTAL SYNC CIRCUIT DESCRIPTION Vertical Sync Horizontal Sync Composite Sync For Interlaced Vertical Sync Sync Interface 2 Comparators Composite sync or separate vertical and horizontal sync are buffered by two comparators in the sync interface circuit A vertical sync synchronization circuit is used to insure a stable raster and functions as a sync separator Vertical Sync Interlace 15K Hz 10uF 1 8K 00 246 47nF Horizontal Sync Vs VC Vertical 2 G The sync interface comparators are biased to 15 volts by resistors amp to permit receiving low level sync signals such as RS170 For low level composite sync the vertical and horizontal lines aretied together and jumper is left off For normal amplitude sync greater than 2 3 volts resistors amp form an attenuator to protect the sync interface comparators and normalize the sync amplitude This combination also reduces noise sensitivity since the sync voltage amplitude is low at the comparator input which slows the comparator response and acts as a low pass filter For theinterlaced sync case the pul
119. T Useonly one hand when working on a powered up monitor to avoid electrical shock Always wear safety glasses Many ofthefailures that cause burnt components and boards are eliminated by the load sensitive switching mode power supply in the CERONIX monitor This feature can cause problems with servicing the monitor if the proper trouble shooting approach is not used The equipment setup shown here is necessary for efficient trouble shooting of the CERONIX monitors Problems that cause the power supply to chirp are nsufficient V line load Overloaded V 424V or 16V lines Shorted V 424V or 16V lines Power supply component failure Raw DC V cto V voltage too low UI qs pr KI l A quick check for the insufficient V load is to connect a 2K to AK ohm 10 watt power resistor from GND tothe V cathode of diode Ifthe chirping stops proceed to check the horizontal deflection circuit First disconnect the board from the AC supply Then connect 16 volts to the 16V line at the cathode of 169 Also connect 24 volts to the 24V line at the cathode of diode and to V at the cathode of diode on the monitor Now the complete horizontal and vertical circuits can be checked with the oscilloscope and DVM The flyback waveform will be about 170V p p instead of 900V p p which permits checking even the H output transistor collector waveform 2 For the overloaded supply line problems the monitor power supply can be made to
120. The coils of the spring should measure about 1 25 2 Next attach the degaussing coil Locate the connector wires at the bottom center of the CRT Loosely attach the degaussing coil with 5 wireties as shown below Adjust the coil for an equal size top and bottom coil half Tighten the wireties 3 Plugthe yoke connectors on the yoke as shown below CAUTION The ground cable from the enclosure to the monitor chassis must be connected before applying power to the monitor ess m N UM Degaussin lt Anode Connection a 51786 51856 lt NP _ Ground Connector Attach to NW CRT socket m board EE C E Degaussing coil Connector Plugs in main board left side of fuse N Yoke Connector Plugs in main board left side of flyback transformer Schematic Bottom Highpot For Shock Hazards Circuit Description For the models 1493 1793 1993 2093 2793 and 3693 video monitors It is the responsibility of the company which uses the Ceronix monitor in there system to make sure that no shock hazards exist Below is a description of the highpot test to verify that the monitor is properly connected to an isolation transformer Once the monitor is installed in the enclosure the protective earth ground connection must be connected The connection point is located on theinside of the main board metal frame behind the serial number label Machinein w
121. UNG Lokalisierung ERDEN I PrimarZeile HIGHPOT Pr fvorrichtung Wire Routing Instructions 4 Attach the protective earth Fold remote cable to clear green yellow ground wire CRT and add wiretie Rout yoke wires over CRT neck Shorten focus wire and add wiretie Shorten EHT wire and add wiretie mE Plug in video board Rout G2 wire around Fold video flat cable to Finished assembly with the ste Sole SEN ten De wires with loop and add metal frame Secure 9 wire tie fold with a wiretie Precision Resistor Arrays PRAS Make solder connection CA when using these C PRAs for replacement parts on the XX92 product line 2000 2000 2000 5 00K C10 5 kl kll kA zw o m PULSE H U i Beam i Beam PULSE i Beam IA Inverts Horizontal Sync 68 1K x Qu 9000 68 1K 14 15 17 BLUE GREEN GREEN LINE i sense i sense Amp out 4 5 6 1 AUTO BIAS RESISTOR ARRAY Film IB IC amp ID Adjust the Horizontal Oscillator Frequency For 31 5KHz Operation 1B Hfo 400 Hz JA Decreases V line by 1 5V J B Decreases V line by 3V pr 12 E FB CAP V 100V to 300V below GND E 6800 110 E 2 2 cere Film H 12V Line LR7851 Pin No Horizontal Control Resistor
122. adjusted by making solder connections on PRA refer to page 65 for thelayout Solder connections and are used to raisethe 127V lineup to 4 5 volts in steps of 1 5 volts Connections JA Jand lower the 127V line as much as 4 5V TheFET works together with the transformer to provide a low resistance current path from V to GND Thislow resistance coupled with no large voltage ti mes current products is what makes the power supply efficient Resistor provides a means for sensing the FET current In the low current mode it is used to set the 300mA current and in the full on mode it is used to Error Amp V Fet Drive 5184 10 aver sense the max current Resistors 140 and capacitor reduce power supply electrical noise Transistor and diode short theFET driveto V when the monitor is turned off to protect the FET from conducting current with a still large drain voltage Resistors J10 J11 and provide a means for checking flyback diode conduction via a comparator Ifthe comparator measures low flyback diode voltage the FET is turned on tothe 3A low current mode This mode is necessary for power up sinceinitially the 127V lineis OV and no reverse diode voltage exists The over voltage protect circuit at pin 14 has a trip voltage of BV and when it is activated it shuts down the power supply TheEHT is measured by rectifying the flyback pulse with diode 130 from a secondary winding of the
123. age by the video source TTL BLUE INPUT B VC 6 PN2222 Black Level Adjustment is optional For separate H sync see schematic at DD8 47nF For composite sync 309 2 320 30 T 27K 100pF If the coupling capacitor voltage on the clamped side is high at clamp time the damp transistor shorts the capacitor to GND by normal transistor action If the coupling capacitor voltage is low at damp time the damp transistors act as dual diodes to raise the capacitor voltage to GND which is the black level reference for the video input circuit The ground referenced video signal is then buffered by transistors 1238 amp through protection resistors amp 276 The buffer transistors are needed to reduce the 6mA bias current from the video interface IC to under 10uA which limits the coupling capacitor voltage buildup to 2mV during one horizontal cycle Resistor and clamp diodes amp are connected tothe coupling capacitors to limit the voltage buildup when no syncis present Ifthis limit did not exist the monitor would show excessive brightness without sync When sync pulses are present capacitor with rectifier diodes amp and filter capacitor apply a voltagetothe base of transistor 274 which raises the voltage on the clamp diodes to avoid interference with the video signal Diodes amp balancethe base to emitter voltage of the buffer transistors Therest of the video interface fu
124. are marked in the Master Part List is shown below Seethe Master Part List for specifying critical components ABd Part No Bd Sch Ref Description 102 CPC1027 D2 6 800pF 5 100V Film CAUTION CERONIX XX93 Monitors MUST USE AN APPROVED ISOLATION TRANSFORMER The monitor chassis must be connected to earth ground via a common connection in the system which contains the monitor X RAY NOTE X radiation is produced by electrons colliding with the phosphor and shadow mask at the front of the picturetube The X radiation emanating from the front of the picture tube is highly reduced due to the shielding affect of the leaded glass face It is also produced at the anode bulb contact The X radiation emanating from the anode bulb contact is much higher than from the face due to less shielding X radiation is directly proportional to beam current It doubles for each 1 3KV increase of the EHT voltage at the face and also doubles for each 3KV increase of the EHT at the anode bulb contact From this information it should be noted that when servicing monitor electronics where the back of the picture tube is facing the service person that the beam current should be turned down to avoid excessive exposure Duetothe increase in X Radiation emission with increase of EHT voltage it is important that the EHT voltage is checked Tomeasurethe EHT voltage Connect the lead of a volt meter to the monitor chassis so that a reliable
125. charge pin 9 and resistor 19 Thefree running frequency Hfo may be adjusted by making solder connections on the PRA see page 65 for the PRA layout In some cases where there are many missing horizontal sync pulses it is necessary to adjust the Hfo closer than 200 Hz For finetuning the Hfo resistor iS replaced with a pot The horizontal phase locked loop then consists of an oscillator which sets the flyback timing The flyback pulse is then compared to the incoming sync pulse and the difference voltage holds the oscillator at the sync frequency The duty cyde of the horizontal drive transistor is generated by comparing the oscillator waveform against a fixed voltage This fixed voltage is set by resistors 417 and 418 ToYoke FLYBACK 10 TRANSFORMER 092A TC11 E The horizontal output transistor conducts about three amps of horizontal flyback transformer primary current and deflection yoke current Thistransistor has a beta as low asthree Tosupply the high base current a horizontal output transistor drive transformer is used Thedrive transformer builds up energy during the on time of the drive transistor which is the off time of the horizontal output transistor 433 Capacitor and resistor damps the drive transformer primary waveform Toreduce power dissipated by the horizontal output transistor during turnoff a clamp circuit is connected to the drive transformer primary This clamp consists of r
126. connection is made Connect a high voltage probe to the input of the meter and at the anode contact of the picture tube The should not exceed 26K V at 0 beam current Sicherheit Kritische Bestandteile f r Monitoren XX93 PRODUKTSICHERHEIT ANMERKUNG Bestandteile gekennzeichnet durch das Symbol haben Sie die speziellen Eigenschaften die zur Sicherheit wichtig sind Wenn Sie irgendwelche dieser Bestandteile ersetzen seien Sie sicher die Teile zu benutzen diein der St ckliste spezifiziert werden Ein Beispiel von wie die kritischen Bestandteile in der Vorlagenst ckliste gekennzeichnet werden wird unten gezeigt Sehen Sie die Vorlagenst ckliste f r das Spezifizieren der kritischen Bestandteile Bd TeilNr Bd Sch Ref Beschreibung 1 102 CPC1027 D2 _HH8 6 800pF 5 100V Film VORSICHT MONITOREN CERONIX XX93 M SSEN EINEN ANERKANNTEN LOKALISIERUNG TRANSFORMATOR BENUTZEN Das Monitorchassis mu an die Masse angeschlossen werden die ber einen allgemeinen Anschlu im System gerieben wird das den Monitor enth lt RONTGENSTRAHLANMERKUNG X Strahlung wird durch die Elektronen produziert die mit der Phosphor und Schattenschablone an der Frontseite des Abbildung Gef es zusammensto en Die X Strahlung die von der Frontseite des Abbildung Gef es ausstr mt liegt in hohem Grade an der Abschirmung beeinflussen vom verbleiten Glasgesicht verringertes Sie wird auch am Anode Birne Kontakt p
127. dem Monitor ausgegeben wird der normalerweise l uft Der Monitor Mu laufen damit 10 Minuten die Heizfadenspannung messen 4 Drehen Sie weg den Monitor Ab Schlie en Sie die variable Spannung 1 Ampere Gleichstrom V ersorgung zum Heizfaden an Das Negativ f hren zu den Heizfaden der am CRT Einfa ung Anschlufsstift 10 gerieben wird 6 Stellen Sie die Versorgungsteilspannung auf das otozelle M essen ein gespeichert in J obstep 3 7 Die gleichwertige Heizfadeneffekti vwertspannung wird jetzt gespeichert indem man die Gleichstromspannung an den CRT Einfa ung Anschlu stiften 9 und 10 mi t SETUP AND CONVERGENCE PROCEDURE m 7 Adjust the yoke position on the CRT neck 1 Usea knife to brake free the magnetic rings to the center of purity One way to locate on the yoke which are usually locked with this yoke position is to make a felt pen mark red varnish Bring the adjustment tabs on on the CRT neck at the rear extreme of each pair of magnetic rings in line for the purity and another mark at the front extreme starting point of purity Make a third mark between the two marks and set the yoke to this position 2 Loosen the yoke damp Removethe yoke Rotate the yoketo line up the raster top line wedges and the tape from the CRT with the top of the picturetube Tighten the yoke damp Tilt the yoke side to side and up and down while watching the red field to verify that purity is good 3 Connect a test generator to
128. der die Videokarte ge ndert wird kann die Heizfadenspannung falsch sein Die Heizfadenspannung besteht aus Hochfreguenzbestandteilen Genaues Messen der Heizfadenspannung kann nicht mit einem Effektivwertme instrument erhalten werden Ein Oszillograph mit Effektivwertmessen F higkeit kann benutzt werden um die Heizfadenspannung zu messen Obgleich ein Sichtpr fen der Heizfadenfarbe eine Anzeige der Heizfadenspannung ist ist es gutes blich die Heizfadenspannung zu berpr fen wenn es irgendeinen Zweifel ber diesen wichtigen Monitorparameter gibt Der folgende Heizfadenspannung Test ist eine genaue Methode des Findens der zutreffenden Effektivwertspannung zum Heizfaden Dieses wird vollendet indem man die helle Ausgabe des Heizfadens vergleicht wenn es durch den Monitor zur hellen Ausgabe des Heizfadens mit einer angewandten Gleichstromspannung mit einer einprogrammiert F otozelle angetrieben wird KONFIG LOKALISIERTE DOPPEL 1A quum ON GLEICHSTROM A x VERSORGUNGSTEIL N Videokarte d 955 HOOK CF Die Heizfadenspannung finden 1 L ten Sie zwei kurze bussleitungen zu den Heizfadenanschlu stiften weich 2 Benutzen Sie schwarzes Band um die F otozelle uber der Bohrung im Plastik CRT EinfaBung Stecker zu sichern Vorsicht Seien Sie sicher die Fotozelle nicht zwischen die zwei Tests zu verschieben 3 Speichern Sie die Gleichstromspannung die von der Fotozelle mit
129. e triggering the bias voltage is set to 7 8 volts by resistors and 13 For negative edge triggering the bias voltage is set to 4 1V by connecting via the solder connection A Horizontal 1 000pF 15KHz 330pF 31KHz 330pF 38KHz 2 2K 5W 1N4007 33Vppl27 E7 L100UF 325 25C4159E 342 gt Wu menm 337 11 exe lt comp PICTURE DELAYED POSITION SYNC 0 5 SAW TOOTH MULTIPLIER SYNC INPUT O S TR GENERATOR BIAS TT 3 4 5 6 2VDC 3 4VDC 2 4 3 4VDC 1 5Vpp J04 E6 1 4 05 6 OVpp 06 6 10K 347 18 1uF 6 800pF 15KHz 3 300pF 31KHz 3 300pF 38KHz The picture position O S damps timing capacitor 351 to 8 2 volts until horizontal synctriggers this O S The voltage on the timing capacitor drops at a rate set by the horizontal position control and resistor 14 When the voltage at pin 2 drops below 4 volts the delayed sync O S is triggered and capacitor IS reset toits damped voltage The delayed sync O S functions the same as the picture position O S with the exception that it is not adjustable Theflyback pulse connected to pin 4 through resistor 16 starts the negative slope of the saw tooth generator When the sawtooth wave which is produced by a current to capacitor 348 drops to 3 volts the sawtooth generator switches back to the positive slope part of the wavetill the next FBP During the active part of the delayed sync pulse the multiplier gates curre
130. e Boos TE DE 4 6VDG 1 3VCD 5 5 Remote Control 2 8Vpp 18 D5 Ks 5503467 Horizontal Raster Adj PCB 290 9 J as lt EL EM V RAS POS 1680 1W VERTICAL BLANKING n Ty PN2907A 00 V VERTICAL _ VERTICAL VERTICAL AY lt OSCILLATOR OSC 0 5 3 1N4148 STT 2 3VDC i 5 1 os HORIZONTAL OSCILLATOR DISCHARGE 210 SYNCINPUT 0 5 D T7VD 4 5 5 3V VS Mel 188 E 1 9Vpp 6t B4 3 TI HORIZONTAL a i7 7 22MQ BLANKING 510 7 3VDC K 5 5Vpp 01 D6 j 15 8 High Temperature Or 514 4 rr ooo cop GT Excessive Beam Current Monitor Shut Down Circuit 15 8K 1 000pF 6KV 4 505 1KV L GND H S 12V 167A A A A AN 084 LL 5 OO un d fa jo Joo 9 tg R a Gr vee 5 FDH400 EOSO O O S o o o A H BEAM Ea A HORIZONTAL WIDTH CONTROL a C 1 47V 8 2 92V 1N4937 H S 12V 100 10 0K 91 4K J13 Jt 12V ABL TTL 00 1500 TF606 2 1 25 1371 Controls XRC5346A _ 3 H Linearit 6 3 S66 2D Vs Linear coil Y 7 15K Pincushion CPT 200pF 4 6Vpp 59 D6 16 n toam s S 5 39 147 i e avczo Hs 02 2
131. e beam current buffer to output This voltageis applied tothe coupling a smaller negative pulse and less voltage is capacitor 921 At the other side of the stored in the coupling capacitor The program coupling capacitor is the channel input which pulse amplitude which is constant is now is clamped to V ref SW in A position The larger than the stored beam current voltage voltage amplitude of the amplifier output with and the channel amplifier will add current to the cathode current information is then stored the bias voltage storage capacitor thus in the coupling capacitor during this correcting the low bias voltage which caused time the cathode to be too far into cutoff After the During the next three horizontal cycles 19 Rh pulse is over a is switched i 20 and 21 the SW is switched to pass current e open position again and the next time the to capacitor which is the bias voltage bias voltage can be adjusted is during the storage capacitor At the same time a next vertical blank time program pulseis applied to resistor Cn CRT AUTO BIAS AND AUTO BRIGHT CIRCUIT DESCRIPTION The beam current feedback circuit uses a PNP video transistor to direct most of the beam current to the auto bias circuit while passing the voltage waveform from the video amplifiers to the CRT cathodes Diode and capacitor insure that no video waveform distortion occurs An additional benefit of this circuit is that it protects the video amplifiers
132. ectifier C13 The Switching Regulator is synchronized to the horizontal pulse and drives a power MOSFET Unlike most regulators that have a common GND this power supply has a common V and current is supplied from V to GND The MOSFET is connected to V and signal ground GND through a transformer which is used as an inductor for series switch mode regulation An operational amplifier voltage reference comparator and oscillator in the power supply controller IC are used to accomplished regulation by means of pulse width modulation The transformer has two taps on the main winding which are used to generate the 16 volt and 424 volt supplies It also has a secondary which is referenced to V and supplies the power supply Since the power supply is generating its own power a special start up circuit is built into the power supply controller IC that delays start up until the capacitor which supplies the IC is charged up enough to furnish the current to start the power supply This capacitor is charged with current through a high value resistor from the raw dc supply This self sustaining action is why the power supply chirps when an overload or underload occurs Additional secondaries to drive the horizontal raster shift circuit and the video amplifiers are also included in the power transformer The Load consists primarily of the horizontal flyback circuit The power supply will not operate without the load since the voltage that sustains the p
133. ed to transistor and load resistor 275 base to emitter voltage of the transistor balances the clamp diode s forward voltage for temperature compensation Resistors and set the damp voltage The gain of the input circuit is set by resistors 264 amp 232 ad 261 228 11 10 A EN 12V ABL XRC5346A 15 8K 00 15 8K 2 15K 2 15K ve GREEN V Replace 221 with a 02 jumper for fixed black level PN2222 Resistors 223 amp produce a voltage drop across the gain resistors to offset the voltage drop caused by the 6mA bias current across the input and protection resistors 12 volts to these resistors produces a fixed black level An optional black level adjustment may replace the 12V with a range of O volts to 11 3 volts Potentiometer is buffered by transistor and resistor which provide the adjustment voltage The master gain line is connected to the video interface C at pin 12 It multiplies the gain set by the resistors 225 226 etc by Oto 1 Vertical and horizontal blanking set the gain to 0 during retrace The is adjusted by the master gain control through load resistor 062 The maximum gain may also be limited by making solder connections S amp 0 Diodes 084 086 amp camp the video lines connected to the video board to prevent damage to the video interface IC from arc related voltage spikes 1Vp p PO
134. en Video Amp ee Blue Video Amp EEE LT AutoBias Vsyne ABA 5 5 6 4V 3Vpp 21 D5 TC9 iB OFF 100pF ERE ppl22 E5 mu ius 1 5 2 7V 24Vpp 24 E4 Raster Position 5 5 6 5V 1 2Vpp 19 D5 1 3VCD 4 5 5 3V DD 3 8Vpp 17 E5 5Vpp 16 5 C r 4 6VDC 2 8 0118 05 Boost S Remote Control 490 RricAL vertical VERTICAL F 02 V VERTICAL VERTICAL VERTICAL OSCILLATOR osc o s VERTICAL BLANKING INCREASES TOP AND BOTTOM VERT SIZE PN2907A 5 1N4148 5 1 i 4 7VDC 4 9Vpp 61 B4 HORIZONTAL BLANKING 7 3VDC 5 5Vpp 01 D6I den 4 56Vop 163 06 _ a 6042 1 21KQ 4 084 4 7VDC FDH400 5 9 Vpp 62 B4 3 4 6 8nF 110 1600Hz 800Hz sav 7 1171 83Vpp 26 E7 Transformer L f CPT1505 12 18Vpd Vs 50Vpp 29 F6 12 18voc Vs 3 5Vpp 31 F5 2563467 V RAS POS 15 8 igh Temperature Or 037 E xcessi ve Beam Current Monitor Shut Down Circuit E 200K TRANSFORMER z FOCUS VERTICAL DEFLECTION YOKE Horizontal Raster Adj 1500 1 2W 425 2700 9 I A 1 11171 vow 6 6 HORIZONTAL WIDTH CONTROL BEAM iBeam_ TTT mum 5 FDH400 1N4937 91 4K J13 12V ABL TTL 1 2SA1371E Controls
135. er connections left right ER The amount ofthe shift is set by solder connections 51 2 amp 54 nductor permits only the DC current to pass to the yoke return Resistors 423 424 amp define the size of the shift together with the V plus 5V and V minus 5V supplies Resistor supplies a load on the V 25V lines to avoid over voltage of the filter capacitors Resistors 185 act as fuses to protect the PCB in the case where both and connections are made HORIZONTAL RASTER WIDTH AND POSITION CONTROL SCHEMATIC Horizontal Raster Position Adjustment 22K 680 1W 1500 1 2W SR H S 12V 180 40y Line 135 14 10 0 14 5100 022 12 11 t 100uF tL 100uF 10 0K ource GND HORIZONTAL WIDTH CONTROL HS 12 10 0K 10 0K 031 00 10 0 2 2 5VDC 4 4 39 3 FBP FBT Pin 8 HORIZONTAL YOKE Horizontal Output FBT Pin 10 972 m 107V or 127VD YC4 120Vpp 250Vpp 32 F6 H Size 425 033 YC3 053 6 200 5 6 6 2VDC Linear 00 jun 2 3 6 0033 2 Pincushion 440 3 6 6 2VDC Horizontal coil Beam Current 1 5KV 1 5KV Load Resistor f 442 241 See A4VDC20VDcH Hs Blooming Table 30 200Vpp 35 H7 m Correction 052 Mee MN 200V 2 200V END 27Vpp 36J7 50uH HER105 HER105 jooge 630V 439 HORIZONTAL WIDTH DRIVE DYNAMIC FOCUS CIRCUIT FUNCTION AND
136. er number is CPM 2011 SETUP UND KONVERGENZ PROZEDUR 1 Benutzen Sie eine scharfes Messer um die magnetischen Ringe auf dem och frei zu bremsen die normalerweise mit rotem L ack gesperrt werden Holen Sie die J ustagetabulatoren auf jedem Paar magnetischen Ringen in der Zeile f r den Ausgangspunkt 2 L sen Sie den Klemmring des ochs L schen Sie die ochkeile von der CRT L schen Sie das Band von der CRT 3 Schlie en Sie einen Testgenerator an den videoinput an A Schalten Sie den Monitor ein Schalten Sie den Testgenerator zum roten Feld J ustieren Sie die horizontale und vertikale Rastergr e mit dem Fernbedienungprett f r Unterscan Lassen Sie den Monitorlauf f r mindestens halbe Stunde 5 Uberpr fen Sie die helle Steuerselbstspannung mit einem DVM Schlie en Sie das DMM an erden und Anschlu stift 8 des LM3241 920 auf der Videokarte an Die Spannung Strecke ist 4 0V zu 4 4V Wenn aus Strecke heraus justieren Sie diese Spannung auf 4 2V indem Sie Zangen verwenden um den unteren Drehknopf auf dem FBT zu drehen 6 Degauss die CRT und das Vorderteil des Monitorchassis VORSICHT Um elektrischen Schlag zu vermeiden ber hren Sie nicht sich zu den J ochleitern oder presse gegen die Anode Schutzkappe Halten Sie immer eine Hand frei beim Arbeiten auf Elektronik 7 J ustieren Sie das J och auf die CRT um Mitte der Reinheit zu erreichen Ein Weg diese J och Position zu finden soll eine Ku
137. ertical component of the dynamic focus circuit is derived by amplifying the voltage waveform across the vertical yoke coupling capacitor The horizontal component of the dynamic to focus circuit is produced by applying the voltage waveform across the horizontal yoke coupling capacitor to the dynamic focus transformer primary This transformer steps up the horizontal parabolic voltage from about 33V to about 300V to produce the horizontal component of the dynamic focus circuit Circuit Description Transistor amplifies the vertical parabolic waveform which exists across capacitor 449 This waveform is coupled to the transistor base via capacitor and resister 501 The bias for this transistor is generated by resistors and 504 The gain of this amplifier is defined by resister and 505 Note Resister is connected to the vertical feed back line and not to ground The supply voltage for the collector is produced by diode which rectifiers the primary flyback pulse and is integrated by capacitor 507 Theload resisters for this transistor are resistors and 511 The waveform on the collector which is the vertical parabolic waveform is conducted through resister and through transformer tothe dynamic focus input of the flyback transformer Resisters and provides arc protection for transistor 509 The horizontal component of the dynamic focus waveform is produced by coupling the primary of the dynamic focus transformer at to the horizontal yoke coupling capac
138. es the GND referenced filament flyback pulse to the 127 volt line Rectifier diodes amp and filter capacitor generate the V minus 7 volt supply Capacitor iS also used to adjust this voltage for different FBTs The filament voltage is adjusted by capacitor and diode or resistor Resistor and capacitor decouples the video amplifiers from the 127 volt line This filter is needed in some models to eliminate video amplifier distortion caused by ripple current on the V line This ripple current is caused by the V minus 7 volt line power supply CRT AUTO BIAS AND AUTO BRIGHT CIRCUIT FUNCTION DESCRIPTION The auto bias circuit is a control system that bias circuit would adjust all three guns in the forms a closed loop for controlling the CRT bias same direction to maintain constant black voltage It generates a set of conditions where level This effect reduces the auto bias the current near the cutoff voltage of each gun is Voltage range which is needed for the cathode measured and then adjusts the bias voltage of differential voltage adjustment To prevent this occurrence a second control loop is added tothe system This second control loop is called the auto bright circuit and corrects for adjustment is necessary since each gun inthe CRT gain a auto bright circuit color picture tube can have a different cutoff senses any common bias voltage change and voltage which also will change as the CRT ages controls
139. es to avoid excessive primary current for the 240 case The control circuit energizes the relay when the line voltage is 120VAC an 240VAC NE 120VAC 50 Hz Relay Control E d Circuit Description The fuse protects the mains wires and the control PCB The power transformer has two internal 2 amp temperature sensitive fuses Each primary half has one built in series connected fuse A resettable fuse is connected to the relay driver power supply This fuse protects the relay control circuit from square wave input which would occur if an inverter is used as the power source Capacitor 512 supplies current from the line to capacitor through diode 1510 which forms the relay control power supply Diode charges capacitor 1512 during the negative going part of the line wave Transient Voltage Suppressor T516 regulates the 24V power supply and protects the relay coil from over heating The Mos Fet shorts out the 24 volt power supply when the input line voltage is 240VAG The input line voltage at which the Mos Fet turns on is set by the Mos Fet turn on voltage about 4V the voltage drops across resistors 1509 7504 and the zener diode 503 154VAC is the approximate line voltage at which the relay switches Capacitor and diode keep the Mos Fet turned on for the complete AC cycle to eliminate ripple current the capacitor 7513 Hesistor limits the peak current to capacitor to avoid relay switching due to line t
140. esistor 341 capacitor 338 and diode 322 Theflyback transformer s main function is to supply EHT tothe CRT Italso supplies the focus and screen grid voltages which are taps on the EHT supply Therearethreelow voltage secondaries One supplies the filament current negative G1 voltage and timing on the video board Another supplies sync and EHT information to the power supply Thethird secondary drives the horizontal blanking circuit and supplies syncfor the horizontal PLL the horizontal width control amp the vertical sync synchronizing circuits HORIZONTAL RASTER WIDTH CONTROL CIRCUIT DESCRIPTION The purpose of the horizontal width control is to 1 Provide a convenient means for adjusting the horizontal raster size 2 Correct pincushion distortion in the vertical axis 3 Correct horizontal raster distortion caused by periods of high beam current The horizontal width control circuit is comprised of two main parts The control circuit and the diode modulator DM The control circuit combines four signals in the monitor to produce the width control circuit These signals are 1 Horizontal size Size Pot 2 Vertical current lv V current feedback resistor 3 Vertical parabolic Iv Vertical yoke return 4 Beam current EHT return on theFBT The diode modulator controls the horizontal yoke current which affects the horizontal size This is accomplished by the diode forward curre
141. fter the voltage at pin 15 reaches 17V Ifthetransformer does not supply at least 12V tothis line before the filter capacitor discharges to 12V the C5184 turns off Thereason for the audible chirp is that the power supply is not full on for each which produces a frequency low enough tohear Seethe bottom waveform on the previous page A 0 30 volt 91A DC isolated power supply is a tool necessary for trouble shooting CERONIX monitors When trouble shooting the power supply it can be connected to V and the 17V lineto keep the power supply running while checking the voltages and waveforms to find the fault Caution do not exceed 20 volts on the 17 volt line It can also be used to supply the GND to 16V line for checking the horizontal circuit Ifthe horizontal circuit does not work the power supply will chirp Without the horizontal circuit working there is not enough load on the power supply for transformer action to keep the regulator IC 17V lineup tothe minimum of 12V A quick check for this condition is to dip a 2 4K o 10W power resistor from GND toV If the chirping stops the horizontal is probably not working The heart of the power supply is the oscillator which supplies the basic timing TheFET driveis always low during the negative slope of the oscillator or when synchronized after the start of the sync pulse Thelow to high transition of the FET drive pin 10 is determined by the voltage at the output
142. ge Red If the voltage is greater than 7V schematic for of affected color Green or OV Replace the transistor the specific pin to emitter 1 KER base to emitter Blue each color Ohm check Tests should CRT socket Red pin 8 If resistance is below 2K replace ran pin of effected Green pin 6 the CRT socket order to reduce color to pin 12 Blue pin 11 chance of replacing Measure voltage of affected color If voltage is 3 8V replace the wrong K Filmpin 4 25C3467 amp the PNP transistor pair component If voltage is less than 2V replace PNP transistor connected to pin Probable Solution NoPicture 1 Note Blanking should be gt 5V The vertical booster pulse supplies Measure blanking voltage on part of vertical syncto the auto bias jumper If 6V to 1V check IC With no syncto pin 8 of Check that the vertical output for waveform Vertical blanking is not reset master gain pot 15 turned up Check light from filament If FBT waveform is the same on both If nolight check FBP before and sides of the filament adjustment cap after capacitor 854 ohm out the filament circuit Measure voltage on Blue K F ilm If this voltage is over 10V replace pin 7 This voltage should be 9 3V transistor 942 Massu If this voltage is under 100V check CRT socket Bin 7 that the FBT bottom pot is turned up Replace CRT Socket if GND to G2 is less than 100K 2 Measure voltage on LM 324 If
143. ge comparator inputs are located at pins 12 amp 13 ofthe C5184 Thetworesistor dividers see next page J10 and 412 connect the comparator across the flyback diode 142 Thecomparator enables the FET drive only after a 10 voltage drop is measured across this diode Another fault condition exists when the FET exceeds 5A drain current This condition can occur if the oscillator frequency is too low the FET drain is shorted to GND or V the transformer has a shorted secondary or the is broken In these cases the voltage across the FET source resistor exceeds 1 6V which is sensed by the over current comparator at pin 11 If pin 11 exceeds 1 6V the FET driveis set to OV for the rest ofthe cycle In some cases this condition can produce an output waveform which looks normal but the voltage across the load 127V to GND would be low or unstable A quick check for this condition is to check the peak voltage across the FET source resistor CAUTION Whenever connecting a scope ground to V besurethat the other scope probe or common grounded devices not connected to the monitor GND Most of the power supply fault conditions cause the power supply to chirp because the source of 17V for the C5184 is generated by the power supply A special circuit is built into the C5184 which permits charging the 17V line filter capacitor with only a very low load from the C5184 This circuit turns the rest of the C5184 on only a
144. gelschreiber Markierung auf dem DATENSICHTGERaT Hals an der Hinterseite und den vorderen E xtremen der Reinheit machen Machen Sie eine dritte Markierung zwischen den zwei Markierungen und Satz das J och zu dieser Position Drehen Sie das J och auszurichten die raster oberste Linie mit dem Oberteil Rohr des Bilds Ziehen Sie die J och Klammer fest Kippen Sie die J och Seite zu Seite und auf und ab wahrend Zuschauen des roten Felds zu begl aubigen jene Reinheit gut ist 9 Wenn die och Position Regelung gute Reinheit nicht herstellt stellen Sie den Reinheit Magneten ein Diese sind die magnetischen Ringe der n chst J och Winden 9 Schalten Sie den Generator zum rot blauem Raster Stellen Sie den 4 Stange Magneten Mitte Paar f r Zusammenlaufen vom roten und blauen in der Mitte des Schirms ein 10 Kippen Sie das och auf und ab f r das beste Zusammenlaufen um die Kante des Rasters F gen Sie den obersten och Keil ein Kippen Sie die J och Seite zu Seite f r das beste Zusammenlaufen um die K ante des Rasters und f gen Sie den restlichen och Keile ein Befestigen Sie dieKeile 11 Schalten Sie den Generator zum wei en Raster Stellen den 6 Stange Magneten Paaren nahst zum Videoausschu f r Zusammenlaufen vom gr nen Schritt 10 und dieser Schritt konnen f r das g nstigste Zusammenl aufen wiederholt werden m ssen 12 Wenn die Eckkonvergenz noch nicht annehmbar ist k nnen Shunts benutzt werde
145. h the internal control of the transconductance amplifier output switch defines the current gain of and stabilizes the auto bright control loop are what establish the timing for the measurement and setting of the video bias CRT AUTO BIAS VERTICAL SYNC CIRCUIT DESCRIPTION The vertical oscillator one shot LA7851 16 supplies the start timing for the auto bias vertical sync This signal is conducted to the emitter of by jumper The base of is connected to the retrace boost pulse by resistor divider and 384 Combining these signals in this way produces a collector waveform which has the vertical oscillator one shot timing and is dependent on the retrace boost pulse The auto bias vertical sync comes from from a buffer circuit for 15KHz operation For 31KHz operation this signal is generated by a delay counter For both cases the vertical boost pulse is and connected with the Vertical Osc O S to provide flicker free operation and laser beam protection In the case of vertical deflection failure the loss of the boost signal causes the auto bias vertical sync to stop which stops the auto bias function and blanks the screen via the vertical blanking circuit thus providing for laser beam protection CRT AUTO BIAS VERTICAL SYNC For Hfo 25 31K Hz For the 15K Hz case transistor inverts the vertical oscillator one shot signal to produce the CRT auto bias vertical sync signal Resistor is the pullup and resistor reduce
146. hich the monitor is used MONITOR is connected to the enclosure ground via the signal cable monitor support hardware and the protective earth ground wire The chassis ground must be connected to earth ground Building wiring All the large accessible metal parts are connected to ground AC line FUSE sol ation ___ GROUND Primary Line POT TESTER Highpot F r Schock Gefahren StromkreisBeschreibung F r die Modelle 1493 1793 1993 2093 2793 und 3693 videomonitoren Es ist die Verantwortung der Firma die den Ceronix Monitor in dort system benutzt sich zu vergewissern da kein Schock Gefahren existieren Unten ist eine Beschreibung Pr fung des highpot zu beglaubigen da der Monitor ordentlich an einen Isolierung Umformer angeschlossen wird Nachdem der Monitor in der Einschlieflung installiert wird mu der sch tzende Erde Erdanschlu verbunden werden Der Anschlu Punkt wird sich auf dem innerhalb des Hauptausschusses Metalls Rahmens hinter dem Seriennummer Etikett befunden Maschine in der der Monitor benutzt wird Der MONITOR wird an den Einschlie ung Erden ber das Signalkabel Monitor St tze Hardware und den sch tzende Erde Erdungsdraht angeschlossen Der Chassiserden mu an die Masse Erdletung angeschlossen Geb udeverdrahtung werden Alle gro en zug nglichen Metallteile werden an erden angeschlossen Wechselstromezeile SICHER
147. hree guns is set to a specific programmed value D The Beam Current Buffer converts the high impedance low current beam current signal into a low impedance voltage This voltage is applied to the auto bias IC through a 200 ohm resistor After the three lines of beam current are measured the program pulse from the auto bias IC produces a voltage drop across this 200 ohm resistor that equals the amplitude of the beam current voltage C9 The CRT Auto Bias IC is a combination of digital and analog circuitry The digital part is a counter and control logic which steps the analog circuits through a sequence of sample and hold conditions The analog part uses a transconductance amplifier to control the voltage on a 10uF capacitor one per gun This voltage is buffered and sent to the video amplifiers as the bias voltage In monitors without CRT auto bias this voltage is adjusted manually using a setup procedure to set the color balance With CRT auto bias the color balance is set during the end of each vertical blanking time The control sequence is 1 The cycle starts with a sync pulse from the vertical oscillator 15K Hz or from the vertical sync delay 15H later the grid pulse starts 2 Thegrid pulse on G1 causes cathode current which can be seen as the three faint white lines at the top of the screen This cathode current is transmitted by the beam current feedback to the beam current buffer where it is converted to a voltage a
148. igh impedance state The capacitor holds the charge from the bias active pulse until the next vertical blank time The advantage of this type of vertical blanking circuit is that if the CRT auto bias IC fails to produce a bias active pulse the screen stays blanked This action protects the CRT when the vertical deflection system fails since the output of the LA7838 boost pulseis needed for the CRT auto bias vertical sync CA3224E pin 9 The video gain line will source up to 32mA during blank time which is the reason for buffering the vertical blank comparator with a PNP transistor 212 Resistors and supply a voltage that is midrange relative to the LA 7851 pulse for maximum noise immunity Resistors and also supply another midrange voltage for the bias active pulse and the vertical blanking hold capacitor to work against Resistors and are used as jumpers The beam current limiter circuit uses the base to emitter voltage of a darlington transistor to set the maximum beam current To sense the beam current capacitor integrates the current pulses produced by rectifying the high voltage flyback pulses The beam current is converted to a voltage across resistor This voltage is applied to a long time constant RC circuit resistor and capacitor 014 before it is sensed by the darlington transistor Thesharpness ofthe limiting response is set by resistors 012 and 066 Transistor then reduces the video gain by pulling dow
149. ilm 11345 CPC1035 E6 JJ 4 3 300pF 2596 100V Film 346 CPC1032 E6 JJ 4 O1uF 2596 50V Film ser cciioo ee 114 iur Sov Electrolytic A 1348 1035 6 114 3 300pF 5 100V Film 348 CPC1027 E6 114 6 800pF 25 100v Film 350 CPC1025 D6 HH4 330pF 2596 50V Film 351 1025 6 GG4 33OpF 35 50V Film 351 1026 6 664 1 000pF 5 100V Film 1352 CPC1000 De 4 56 35 100 Ceramic 353 CPR0145 06 15 8 1 1 4W MF 354 CPROIS5 De 666 681 0 31 14W MF 355 1406 6 FF7 Quad Comparator LM339 356 CPR0012 C6 FF7 2 7KQ 5 1 4W CF 356 CPRO140 C6 FF7 3 92KO 1 1 4W MF 357 0009 6 GG6 1KO 5 UAW CF 357 CPR0050 C6 FF6 09 Jumper Wire 5 30 358 CPC1035 C6 GG7 3 300pF 5 100V Film _ 358 0050 1360 GG6 360 Tue GG6 15 860 31 1 4W MF A CPA4233 1493 CGA G CPA4247 1793 SVGA M CPA4112 2093 CGA S CPA4231 2793 VGA 4235 1493 CGA H CPA4250 1793 SVGA 4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA O CPA4224 2093 VGA U CPA4172 3693 CGA D CPA4232 1493 SVGA J CPA4255 1993 VGA P CPA4227 2093 VGA V ISO XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA CPA4108 2093 VGA W ISO XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA CPA4104 2793 CGA X Vertical Deflection Booster A Bd Part No Bd Sch
150. in line is programmable via resistors 076 and solder bridges at S T amp The solder bridges may connect resistors 244 245 258 and 260 to the video gain line This arrangement permits a variety of input signals and picture tubes to be used with the same monitor PCB Horizontal blanking H g is added tothe gain line by transistors 072 This transistor pulls down on the gain line when the flyback pulseis high Capacitor IS charged by diode and resistor such that as soon as the flyback pulse starts going positive the NPN transistor turns on and horizontal blanking starts Thetime constant of capacitor and resistors and iS chosen such that the capacitor will lead the FBP on the downward slope and turn the horizontal blanking transistor off just at the end of the FBP This advanced timing compensates for the turn off delay of transistor 072 Vertical blank time is started when a low going pulse from the LA7851 pin 16 causes the output pin 1 of the dual comparator togolow Capacitor is discharged through resistor at this time After the end of the LA 7851 pulse the capacitor holds the output pin 7 of the comparator low until the bias active pulse recharges the capacitor through diode 253 During the high time of the bias active pulse the comparator output pin 7 is still low because of the voltage drop across the diode 253 The end of vertical blank time occurs when the bias active line returns to it s h
151. input cables are present The damp reference the video amplifiers when the video gain lineis at voltage is set by resistors 272 273 and buffer 8 2 volts For alower gain line voltage part of the transistor Load resistor stabilizes this current is directed to the 12 volt line During blanking buffered clamp voltage all the input current flows to the 12 volt line OV to 7V POSITIVE ANALOG DC COUPLED VIDEO INTERFACE CIRCUIT DESCRIPTION To Video Board Blanking amp Beam Current Limit VIDEO GAIN FDH400 S 0 O LINE TS erem 1 62K 1 21K A 182K TC 3 Blue 260 244 245 076 DE RC2 2 7K 1 21K 12V 258 12V 91 ra Controls 09 15 8K 00 1 87K GND vc 292 5 Ve RED 4 INPUT INPUT For DC coupled positive analog video signals the signal source black level is O volts The standard saturated color voltages are 7 volt and 1 volt The RGB video signals and sync are connected to the monitor through the video input connector 292 Resistors 288 286 amp terminate the video lines and load theinput such that when no signal source is connected the screen is dark Resistors 278 277 amp protect the video interfacelC from transients They also act as load resistors for the clamp diodes The clamp diodes 271 270 amp limit the peak amplitude of the video to prevent overdrive of the video amplifiers These diodes are connect
152. ion 50 5 Horizontal picture position 1 Left Master gain M odel Min 27 4 20 3 3693 ft 1 0 Le The board Controls are located on the main PCB Focus and G2 on the FBT Optional board Controls are pincushion video black level and horizontal hold control Color Temperature Horizontal linearity Vertical linearity Pincushion 6 Environmental Operating temperature Storage temperature Operating humidity Storage humidity CERONIX XX93 Monitor Electrical Specification 7 Picture tube 793 VGA SVGA 1793 5 1993 5 Inc Inc Useful diagonal 18 Useful horizontal 12 28 14 4 Useful vertical 9 96 45 10 8 Useful area 125 irf 804 cm 165 Spacing of dot line trios 0106 27mm 25mm 0102 Phosphor Trio Dx o o Defletionange __ 90 90 39 16 12 Dot Dot Dot Light transmission CRT surface Phosphor P22 2093 VGA 2793 CGA 2793 VGA Inc Inc Useful diagonal 18 9 79 26 8 Useful horizontal 159 404 15 9 404 44 21 4 Useful vertical 11 9 08 16 1 Useful area 189 irf 1224 cm 2220 ct 345 irf S pacing of dot line trios 0307 78mm 0326 83mm 0326 83mm Phosphor Trio Type Deflection angle 90 90 Light transmission CRT surface Phosphor P22 Useful diagonal Useful horizontal Useful vertical 16 0 406 Useful area Spacing of dot line trios Phosphor Trio Type Deflection angle Light transmission C
153. ire 215 0050 4 J 00 Wire 216 0050 4 00 217 0050 4 J 00 218 CPROOSO B4 BB7 08 Jumper Wire 218 CPR0129 B4 7 3400 1 1 4W MF 221 ePRoosojaa DD7 08 Jumper Wire 222 050 4 J 00 223 CPRO140 A4 887 3 920 1 14W 223 CPRO144 A4 BB7 12 1KQ 1 1 4W MF 223 CPRO145 A4 BB7 15 8K0 21 14W MF 223 CPROI53 A4 7 20 0 0 31 14W MF 225 CPD1252 A5 AA7 1A 1KV Diode IN4007 225 CPROOO0 A5 7 2 20 45 CF 225 CPROO03 AS AA7 4 70 35 225 0050 5 AA7 09 Jumper Wire 225 CPR0129 A5 7 3400 1 1 4W MF 226 CPROI24 A5 AA7 75 00 31 MF 226 CPROI25 AS 7 88 70 31 AW MF 226 CPR0127 A5 AA7 2050 1 1 4W 226 CPR0173 A5 7 64 90 1 1 4W MF 227 0018 5 BB5 62KO 35 CF 228 CPROO50 A5 00 Jumper Wire 5520 _ 231 CPRO141 A5 DD7 4 42K 2 1 1 4W MF 231 CPR0144 A5 DD7 12 1K0 21 14W ME 231 CPROI45 A5 DD7 15 8KQ 31 231 CPROIS3AS DD7 200K0 21 14W MF 232 CPROI21 A5 CC7 57 60 1 1 4W MF EXE ES 1232 cPRo122 5 cc7 1050 1 yaw MF III 232 CPROI24 A5 CC7 75 00 31 IW MF 232 CPR0125 A5 CC7 88 70 1 1 4W MF 232 CPROI127 A5
154. istor and AC coupled by capacitor 885 to the PNP transistor of the push pull output stage Resistors and protect the push pull transistors from current spikes caused by voltage transients when CRT arcing occurs VIDEO AMPLIFIER SCHEMATIC Blue Video Amplifier 12V VIDEO INTERFACE i MG G B VIDEO SOURCE external The bias current of the push pull output stage is set by resistors K14 K15 and diode connected transistor 950 Transistor is thermally connected to transistor to maintain the same base to emitter voltage drop Note that resistor adds 11mA to the diode connected transistor 350 This current is availableto drive the base of transistor during periods of high frequency amplification This high base current is needed because the beta of transistor is low for high current pulses and when high frequency is amplified many high current pulses occur The mechanism for transferring the current from VERTICAL and HORIZONTAL BLANKING Master Gain amp Beam limiter 127V 16V 18 120V a Ese PAL 24K Mog yes auo 172 K15 1400 BLUE 80 110VDC Current Feedback FROM CA3224 1 8K 9 25V MPS A64 s 3 92K aD transistor to the base of transistor is the coupling capacitor which charges through resistor on the positive part of the signal and discharges through the base of transistor on the negative part of the drivesignal Therefore the output stage
155. itors at and 444 Capacitor provides a low impedance pass to ground for the horizontal parabolic waveform which is developed across the dynamic focus transformer secondary at 518 Capacitor insures that there is no D C component across the transformer primary Resister protects the dynamic focus transformer primary from overload Theflyback transformer couples the dynamic focus waveform to the Z2 focus grid via an internal capacitor 24 Booster Drive Vertical Booster Amplifier Circuit Circuit And Function Description Monitors with vertical deflection current which exceeds 2 2 Ap p cannot be driven directly by the LA7838 vertical 4 Thermal Protection deflection IC The vertical booster amplifier circuit Deflection reduces the output current of the LA7838 by amplifying fem us the vertical deflection current TheLA7838 is mounted Boost on the vertical booster amplifier circuit board to allow the boosters circuit to be inserted at the output of the LA7838 Pr s wm PCB View h Side Vertical Amp CPB1615 44Vp p 153555259 11 13 Vertical yoke drive voltage waveform FR205 Vertical Booster Circuit Operation Thefollowing waveforms are taken from 28 the 2793 VGA monitor See waveform 1 for the vertical deflection current Waveform 2 shows the LA7838 output current Waveform 3 shows the 62 0 6Ap p current supplied by the 3 0Ap p Vertical yoke
156. justs the CRT gain to compensate for gain loss with age The horizontal size control circuit permits the horizontal size to be adjusted from a remote control board This circuit is also used to compensate for pincushion distortion and blooming Anti blooming is accomplished by correcting horizontal size variations which are caused by the additional load on the flyback transformer under high beam current conditions Careful reading of all the information presented in this manual is a good way to learn how to repair the CERONI X monitor 10 11 Installation Instructions For The XX93 Monitors A 3 amp slow blow fuse for the degaussing current and a 75 VA isolation transformer are the minimum requirements for using our monitor in a product Unpack the monitor n Refer to the installation instructions supplied Install the monitor in the enclosure by the system manufacturer for details of mounting the monitor in the enclosure Connect the green yellow ground wire to the earth ground connection on the enclosure This wire is connected to the ground screw located on the monitor chassis behind the serial number label WARNING Failure to connect this ground wire before applying power is not allowed since this condition can produce a shock hazard The chassis to mains connector resistance shall not exceed 100m Check that the following wires are properly connected A Green wire from the CRT aquadag braid to the video board B
157. k which senses the DC component of the vertical output voltage is also the current feedback for the LA7838 It is made up of voltage divider resistors and t 393 and wave shaping integrator The wave shaping integrator capacitor and resistor 15 used as the primary vertical linearity adjustment amplifier is connected to the power amplifier which drives the yoke A booster circuit is connected to the the power amplifier supply via capacitor and clamp diode such that when the booster is active during vertical retrace the power supply to the vertical output amplifier is doubled Resistor and capacitor make up a high frequency vertical output stabilization circuit The vertical output at pin 12 is connected to the vertical yoke Resistor is load resistor across the yoke which stabilizes the vertical deflection feedback loop The yoke return is decoupled by capacitor and the vertical current is sensed by resistor 385 The vertical raster position is adjusted by injecting current in the vertical yokereturn This is accomplished by transistor 420 with emitter resistor 394 and the V RAS POS control 483 A capacitive multiplier circuit is connected in series with the 27 volt line in the 27 monitor to reduce the ripple voltage due to beam current variations Transistor conducts current from the 27 volt linetotheL 7838 deflection supply input pin 8 Capacitor and resistors and form a low pass filter which is c
158. l 24 28V to Vertical Deflection V 4 plus 5V H Raster Shift 16V 18V to 12V Regulator minus 5V H Raster Shift V 1 5 3V 1N4937 193K J13 4 160V Zener 2SA1371E NoDVM 300Vpp 40 G1 DELAY Rx 2 200pF 27Vpp 57 F1 NOTES POWER SUPPLY VOLTAGES REFERENCED FROM V AO A SCOPE GND MUST NOT BE CONNECTED TO GND AND V AT THE SAME TIME VOLTAGE CURRENT CIRCUIT SUPPLIED DIODE FILTER CAP 17VDC POWER SUPPLY CONTROL 141 100uF 16VDC 500mA VIDEO AND INPUT 1 000uF 24 27VDC 350mA V 8 H DEFLECTION 1 000uF V MODIFIER LU 3 5VDC 150mA H RASTER SHIFT LEFT 100uF sEcONDARIESL V9s5VDC 150 H RASTER SHIFT RIGHT 122 100uF V 20VDC 60mA 1VIDEO BOOSTER 220uF The degaussing coil drive circuit may use a dual posistor or a single posistor with a 3A Fuse shorting relay 468 The off current of the single posistor is large enough to cause raster movement when there is a differance between the line frequency and the verti cal Degaussing Coil sync frequency Posistor CPR0430 CPR0434 Equipment Setup For Repairing The Model XX93 Monitor DVM ISOLATION TRANSFORMER No DVM EN 320Vppj40 G1 ISOLATED DUAL 1A DC POWER VARIABLE TRANSFORMER When all else fails connect 20 volts to the power supply 17 volt line and slowly increase the AC voltage up to just before the the power supply chirps Thisis ca
159. le Abk hlen Das XFR75W und das XFR100W m ssen geerdet werden indem man an einer geerdeten leitenden Oberfl che mit mindestens zwei Schrauben einh ngt WARNING Haupt ac Kraft und Erdanschl sse m ssen gemacht werden bevor Spannung f r DEN XFR75W oder Den XFR100W Isolierung Transformator gegolten wird WARNING Zu anhaltender Sicherheit ersetzen Sie Sicherheit Kritische Bestandteile nur durch empfohlene Teile des Herstellers Siehe Service Literatur Model ISO XFR 75W Specifications Electrical Notes Volts 120VAC 108VAC to 132VAC 108VAC to 146VAC for 120VAC Volts 240VAC 216VAC to 264VAC 108VAC to 146VAC Volts 120VAC 108VAC to 132VAC 216VAC to 292VAC u wires Volts 240VAC 216VAC to 264VAC 216VAC to 292VAC for 240VAC 50Hz to 60Hz 50Hz to 60Hz Input output 100VA 75VA Full Load Capacitance 250pF input to output Highpot Voltage 3 000VAC input to output Environmental Operating temperature range is 20 C to 60 C Storage temperature range is 25 C to 70 C Operating humidity 20 to 80 Noncondensing Mechanical Unitweight 42Lb 191Kg Endosure dimensions OO OQ OD QOO X GOO OG 0000000 0 20 DIA holes on a 0 40 grid 190 DIA X 375 DIA J MAA j I 0 56 4 PL _ Vv 0 56 4 PL MATERIAL 05
160. lled the smoke test Test Generator Or signal Source L egend Description Represents the XX93 board part number The parts list gives the No CERONIX PART NUMBER which is indexed to the board part number LTR No Part numbers of the resistors on the PRA indicated by LTR X lt PRA pin number To determine which PRA the pin number m belongs to look for the nearest PRA part number on that line DC voltages measured to GND except in the power supply LEGEND where V is the reference Use a DVM for DC measurements lt BOARD PART No Test Point board cross REF erence location lt PART No ON PRA Vp p TP REF _ f The waveform is normally checked with a oscilloscope X iret O L CAUTION When making measurements ars taken with KOODE Syne AC VOLTS TEST POINT on the power supply be sure that the other S susiy Peak to Peak ASS REF scope probe is not connected to GND Vs 2mS div AVEFOPM Measured with scope Ausr stung Gegr ndet F r Die Reparatur Des Monitors Des Modells XX93 NoDVM 320Vpp 40 G1 Pr fen Sie Generator oder Signalquelle L egende Beschreibung N CERONIX Modell XX93 LOKALISIERUNG TRANSFORMATOR LOKALISIERTE DOPPEL 1A GLEICHSTROM VERSORGUNGSTEIL VARIABLER TRANSFORMATOR Wenn ganz sonst ausf llt schlie en Sie 20 Volt an das Versorgungsteil eine 17 Volt Zeile an und
161. ltage circuits are used to set the vertical linearity The vertical Output is a power driver with thermal protection which drives the vertical deflection yoke It also has a special pump up circuit which doubles the output voltage during vertical retrace This voltage doubler also increases the efficiency of the circuit since the high retrace voltage is not present across the power driver during the trace time The Horizontal Control sync delay and a phase locked loop to generate the horizontal timing The H POS adjustment on the remote control board sets the sync delay time which controls the picture position The phase locked loop uses the flyback pulse to generate a sawtooth wave which is gated with the delayed sync pulse to control the horizontal oscillator IN The Horizontal Driver supplies the high base current necessary to drive the horizontal output transistor which has a beta as low as three A transformer is used to step up the current from the driver circuit and also protects the horizontal output transistor from a continuous turned on state A special clamp circuit is connected to the transformer which reduces the turnoff time of the horizontal output transistor for reduced power dissipation Lo The Horizontal Output transistor is mounted to the rear frame which acts as a heat sink The collector conducts the 900 volt primary flyback pulses which should not be measured unless the equipment is specifically designed to
162. lup resistor 15 left off and the voltage divider resistors and act as the pullup Alsothe vertical sync synchronization comparators are disabled by changing the input resistors to bias the comparators in the high output state and resistor is left off Capacitor acts as a sync separator for composite interlaced sync Capacitor and jumper are used to couple the composite sync to the LA7851 vertical syncinput pin 19 The vertical sync synchronization window comparator generates a pulse a little after the midpoint of each horizontal cyde This pulseis shorted to GND by transistors except when vertical syncis active The two transistor circuit permits using either positive or negative pulses for vertical sync Vertical Sync To Horizontal Cycle Synchronization and Composite Sync Decoder ToLA7851 pin 19 ToLA7851 pin 1 The synchronization circuit is bypassed for interlaced vertical sync because this circuit rejects the half horizontal linetime variation used to generate the interlaced vertical raster 12V 7 15K 7 15K Horizontal Sync FBP 9 15 8K 68 1K 15 8K 4 354 360 4 6Vpp 58 D6 152 0 59 06 1K 357 3 92K 05VDC Capacitor couples the vertical sync pulses to transistors amp 255 When no sync pulse is present transistor is turned on by resistor 246 Fora negative vertical sync pulse transistor is turned off by the negative pulse applied to resistor and the window comparator pul
163. m Kondensator beseitigt um das Relaisschalten wegen der Zeile Ausgleichstr me zu vermeiden Die zenerdiode 7515 die von der MosFet Quelle an Gatter angeschlossen wird sch tzt das MosFet Gatter gegen berspannung Widerstand 7519 151 erforderlich den Hauptleitungen Strom zu begrenzen wenn das Relais ber beiden Sets Kontakten einen Bogen bildet Kondensatoren und verringern die Kontaktger usche des Relais 518 die beim Schalten festgelegt werden kann WARNING Grounding of the monitor is to be evaluated in the end user application Installation Instructions 1 Mount the unit on a grounded flat metal surface using at least two screws Note The mounting surface should not have holes larger than 0 2 diameter under the enclosure 2 Connect the mains cable to the Molex plug mounted on the enclosure 3 Connect the output cable from the unit to the monitor power input connecter AVERTISSEMENT La mise a la terre de l cran doit tre valu e dans le produit fini Instructions d installation 1 Fixer l appareil a une surface m tallique plane et mise la terre par au moins deux vis Note La surface de montage ne doit pas presenter de trous de plus de 5 1mm 0 2 po sous le boitier 2 Raccorder le cable du secteur a la prise molex sur le boitier 3 Raccorder le cable de sortie de l appareil au connecteur d entr e de l cran WARNING Die Erdung des Monitors soll in die Endbenutzeranwendung ausgewertet werden
164. n um dieses Problem zu beheben Shunts sind von CERONIX vorhanden Shuntauftragsnummer ist CPM 2011 CERONIX INC 13350 New Airport Road Auburn California 95602 7419 e CERONIX Tel 530 886 6400 ese Fax 530 888 1065 2 2 WEB www ceronix com REPLACEMENT PARTS PURCHASE ORDER FORM Date Purchase Order No Requisition No Name BILL TO SHIP TO STREET 8 NO STREET 8 NO CITY CITY Phone No Fax No Shipping Information Comments CERONIX Please copy form and fill in parts order on copy DEGAUSSING COIL ATTACHMENT SPECIFICATION For The Model 1493 Video Monitor Use degaussing coil part number 51766 ATTACH THE GROUNDING STRAP FIRST With the degaussing coil leads centered on the bottom of the CRT FORM THE COlL to avoid the remote control board INSTALL A WIRE TIE through INSTALL A WIRE TIE through the top hole the left CRT ear the top hole in the right CRT ear INSTALL WIRE TIES through INSTALL WIRE TIES through the bottom holein theleft CRT ear the bottom hole with the grounding strap spring in the right CRT ear Degaussing Coil amp Grounding Strap Attachment Specification For The Model 1793 1993 2093 Video Monitor 1 Thefirst item to attach to the picturetube is the grounding strap Lay thetube face down on a soft surface Slidethe folded over end of the braided wire over thetop left CRT mounting ear The braided wire is
165. n on the master gain line upon excessive beam current The beam current is also reduced if the FBT temperature sensor exceeds 74 Resistor sets the temperature at which this circuit becomes active Theresistance of thermistor decreases with increasing temperature until the voltage at the cathode of diode is low enough toturn on transistor which turns on transistor and darkens the screen The fault circuit senses the temperature or beam current line with a comparator connected OP Amp at pin 2 input The input of the OP Amp is biased to 3 volts by a voltage divider resistors and 037 Theoutput of the OP Amp is connected to a low pass filter resistor and capacitor to insure that the fault circuit does not become active on power up Transistor conducts the fault signal to the over voltage protect input of the power supply IC Resistor protects the voltage translator transistor and the power supply controller IC BLANKING MASTER GAIN BEAM LIMITER AND FAULT CIRCUITS SCHEMATIC Remote control PCB MASTER VIDEO GAIN LINE 1K RC2 4 7VDC 062 4 9Vpp 61 4 LIIS VERTICAL BLANKING BIAS ACTIVE From auto bias IC pin 13 4Vpp 63 C4 MPS2907 6 VERTICAL BIAS 5 From LA7851 pin 16 5Vpp 16 E5 Lr T HORIZONTAL BLANKING PN2222 FLYBACK PULSE From FBT pin 8 56Vpp 62 6 VIDEO INTERFACE IC 12V BEAM CURRENT LIMITER CIRCUIT 6V 1K 009 LIMI
166. nctions the same as the DC coupled video interface circuit VIDEO AMPLIFIER CIRCUIT FUNCTION DESCRIPTION The video amplifier is a high speed push pull amplifier which can swing as much as 90 volts The maximum dynamic output swing is limited to 60 volts Therest of the output voltage range is reserved for bias adjustment 12V VIDEO INTERFACE SIMPLIFIED VIDEO AMPLIFIER CIRCUIT The video amplifier drive circuit is built on a ceramic substrate which is a good heat sink The printed resistors and conductors are small and have precise geometries which output a faithful reproduction of the input signal with good high frequency response and low overshoct 127V 120v 9600 K17 1400 n 2541370 K15 OUTPUT K 150 The NE592 is a 120M Hz emitter coupled differential amplifier which is connected to a push pull output stage This output stage has a low bias current of 3mA and a bandwidth of 25MHz Although at 25M Hz the output stage current increases to 15mA VIDEO AMPLIFIER CIRCUIT DESCRIPTION The video amplifier s output voltage with no input signal is the black level which is the picture tube cut off voltage This voltage is set for each of the three video amplifiers by the auto bias circuit via the bias control line This black level voltage has a range of 80V to 110V The voltage swing at the output is 60 volts for a 10 mA current signal from the C5346 For this same 10 mA current signal the voltage
167. nd applied to the CRT auto bias input pin At this time the CRT auto bias IC outputs a reference voltage at its input pin which sets the voltage across the coupling capacitor This coupling capacitor voltage is directly dependent on beam current 3 After the grid pulse is over the program pulse matches the voltage from the beam current buffer f the voltage from the beam current buffer during the grid pulse is the same as the voltage from the program pulse the bias is correct and no bias adjustment is made for that vertical cycle The timing of the auto bias IC is synchronized to the vertical oscillator and the flyback pulses For horizontal frequencies higher than 15 7K Hz a Vertical Sync Delay may be needed to position the grid pulse generated 3 gray lines at the top of the screen The need for the delay circuit is dependent on the particular CRT vertical retrace time The aging of the picture tube CRT not only affects the balance of the cathode cutoff voltage which is corrected by the auto bias circuit but it also affects the gain of the CRT The Auto Bright circuit actively corrects for CRT gain changes by sensing any common bias voltage change from the auto bias circuit and adjusts the screen voltage to hold the average bias voltage constant lower adjustment on the flyback transformer which is the screen voltage is used to set the auto bright voltage to the center of its range Therefore the auto bright Circuits sets up
168. ne Tuning Clamp Enable Pulse Voltage on 401 __ S n A NE Y oke Current The vertical oscillator in the 7851 supplies timing tothe vertical deflection IC to maintain a raster with no sync present Vertical sync supplies the timing when sync 15 present The one shot in the LA7838 damps the ramp forming capacitor to 5V during the first half of vertical retrace Theramp forming capacitor is supplied with current by a current source at pin 6 The current source has a fixed 6 volt input voltage at pin 4 A linear ramp is generated if a fixed resistor is connected from pin 4 to GND F eedback from the yoke current via resistor 403 is used to modify the linear ramp which helps correct for nonlinearity introduced by the voltage feedback circuit connected to pin 7 The vertical size control is connected to the current source input since adjusting the slope of the ramp adjusts the vertical size This ramp with the clamp as the discharge produces a sawtooth waveform which is connected to the input of the vertical control differential amplifier at pin 6 23V to 427V Retrace a Vertical Yolk Voltage F eedback 390 392 449 Current F eedback 385 The combination voltage and current feedback circuit senses the parabolic waveform on the yoke coupling capacitor and is connected to the yoke current sense resistor 385 This circuit is then connected to the other inpu
169. nnungs Draht vom Flybacktransformator zur der Bildrohrenanode J ochkabel vom J och zum Hauptschaltpult m Fernsteuerung Kabel vom Fernsteuerungschaltpult zum Hauptschaltpult Notiz Seien Sie sicher diese Dr hte sind so befestigt da sie kein Metallteil ber hren Stecken Sie den Signal Erdung 7 Leiter Video Verbindungsstecker 12V Von Monitor Rotes Video Horizontal sync Gr nes Video Vertical sync Blaues Video ISOLIERTRANSFORMATOR SICHERUNG ONR mm Verbindung ist auf dam Gr ne Gelben Schutzleiter Monitore chassis Stecken Sie den Stecker vom Netzstrom Isoliertransformator ein Schalten Sie den Monitor und die Steuerung an Pr fe Sie den Fokus und wenn notwend stell en Sie die obere Kontrolle ein auf dem Flybacktransformator Stellen Sie die Kontrollen des Fernsteuerungsschaltung ein f r richtige Horizontal Raster Gr e Vertical Raster Gr e Vertical Raster Position Horizontal Bild Position VideoKontrast F r Konvergenz Anweisungen auf seite 100 amp 101 CERONIX XX93 Monitor Electrical Specification INPUTS 1 Standard Video Configurations available are A Positive Analog DC Coupled 75V Black level Video Source Video Saturated color 0 75V 0 77V 0 79V 1 0V Black level 0 00V 0 02V 0 04V Video Saturated color 1 00V 1 02V 1 04V 75V Black level BIk 02V Blank BIk 02V Video Saturated color B
170. normal operation are shown above For the shorted 127V to GND condition which also occur right on power up the waveforms are FET Gate Drive FET Drain Voltage Inductor Current SL MN The first FET pulseis a full on pulse next cycle with current still flowing in the which causes current to flow in the inductor flyback diode a current spike of 6A would After the FET is turned off the current in occur which is a power spike of 2 000W the inductor drops much more slowly than Thereason for this is that the diode stores normal since the inductor is discharging charge when current flows which turns into into a much lower than normal voltage If reverse current for a short time when the the FET were turned on for full power in the voltage is reversed across the diode SIMPLIFIED POWER SUPPLY CIRCUIT DESCRIPTION TheFET drive circuit avoids this problem by sensing flyback diode conduction Ifthe diode conduction is sensed the low current start mode is selected This mode turns the FET on toa current of 1A for not morethan 4uS If before or during the low current FET on time the flyback diode breaks free and the FET drain voltage goes down the flyback diode voltage comparator will signal the regulator to permit the FET to be turned on for a full power cycle The after the last low power cycle in the waveform on the previous page is an example of this condition Theflyback diode volta
171. nt In effect the diode shorts out the horizontal width coil to the extent of the diode forward current during the previous horizontal tracetime The current used to control the diode forward current comes from the diode modulator and is controlled by the control circuit and the switching mode driver The horizontal size voltage from the remote control PCB is applied directly to the current node LM 392 Pin 5 of the control amplifier by resistor 043 For pincushion correction two separate signals are used Theinverted vertical current waveform TP 34 and the yoke return waveform TP 33 The yoke return waveform indudes a parabolic and linear component Theinverse of the linear component is added to the yoke return waveform to correct the pincushion The vertical current waveform l v is inverted by an Op Amp and resistors and 051 Resistor level shifts the inverted v to 6V The vertical parabolic 1 is AC coupled by capacitor and resistor and Itis then amplified by an Op Amp connected as a voltage follower Resistor protects the Op Amp against arc related voltage spikes Load resistors and prevent cross over distortion of the Op Amps by using only the current source transistors The inverted Iv and parabolic voltage Hv are added to the current node of the control amplifier by resistors 041 amp which then makes upthe pincushion correction signal The beam current from the FBT is converted toa voltage by resist
172. nt to capacitor which IS dependent on the sawtooth voltage at the delayed sync pulse time Capacitor sets the 0 voltage for the multiplier which is the average value of the sawtooth waveform If the delayed sync pulse occurs when the sawtooth is at a low voltage part of its cycle capacitor discharges and the oscillator frequency lowers If the delayed sync pulse occurs at the top part of the sawtooth wave no current flows to capacitor 346 This action phase locks the horizontal oscillator to the incoming sync pulses HORIZONTAL DEFLECTION SCHEMATIC 19 25C5690 1000 Horizontal am IE Drive 20 gt oap Transformer mE A A 1 20 LA7851 107V 127V HORIZONTAL 415 OSCILLATOR DISCHARGE H V 3 7VDC 5 5 6 3V Hs 6 3 6 08 6 336 170Q nu 800 2 400 2 6 6 800pF 15KHz 3 300pF 31KHz 3 300pF 38KHz The voltage on capacitor controls the horizontal oscillator frequency 18 the case of missing horizontal sync pulses the multiplier does not sink current and flywheel capacitor holds the horizontal frequency constant Resistor permits small rapid changes of the control voltage at pin 7 for locking of the oscillator to horizontal sync The horizontal oscillator capacitor charges to its upper voltage limit through resistors 110 116 115 114 and 336 This capacitor is then discharged to the lower voltage limit through the action of dis
173. of the error amplifier If V goes up in voltage the error amplifier voltage goes up which then intersects the oscillator waveform at a higher voltage and causes the FET on time to start later and be shorter This negati ve feedback accomplishes the control loop of the power supply Theregulator IC has a built in reference voltage which is used by the error amplifier to set and hold the V constant Solder connections on the PRA are used to adjust Vc in steps of 1 5V The over voltage protect OVP circuit when activated turns off the regulator C until power is disconnected This circuit is connected to the rectified flyback pulse which outputs a voltage that is proportional to the EHT Thecircuit s main purpose is to protect the user against excessive x ray which is caused by excessive EHT The OVP circuit is also activated if the monitor temperature goes too high or if too much beam current is demanded from the FBT The purpose of the last two functions is to protect the FBT and the CRT from component failure on the main or video boards SWITCH MODE POWER SUPPLY CIRCUIT DESCRIPTION Oscillator waveform without sync en nn rn Oscillator waveform with sync 2 FET drive The series regulator IC 115 controls current to the monitor GND by pulse width modulation A PNP transistor 112 has an emitter current that is directly proportional to the 127V line voltage due to resistor and adjustment resist
174. ole FF 950 CPO1301 K2 SS5 60V 6A PNP PN2907A A 8 Ic D E Ir u IK 951 CPQ1309 K2 556 1A 200v PNP 25A1370AE a oe IF IMIN 952 CPROOS0K2 J OO Jumper Wire AB Ic pe Ir JG HI u K JL MIN 953 CPRO127 K2 556 2050 1 yaw mF alle 954 CPQ1309 K3 TT7 200V PNP 2SA1370AE A Ic D E E 4 IK E MIN MEE C aH ECT e c p E F GH 956 CBCI005 id A 8 C D E Ir G H 1957 cPC1043 K3 TTS TIEFER 1957 TT5 1uF 25 50V Film Io E G HI r jr jr jr jr IM IM TF FP zi EE p r jr jr jr u L M L M N L M N L M N L MINI L M N L M N L M N MIN EL L M N L M N L M N L M N L M N L M N MIN MIN MIN MIN KIGE E ES ESI ER ES ES ES EI HIS ES E ERE KII ES RE EI EI SIRE EE CERONIX XX93 Monitor Part List 62 A CPA4233 1493 CGA CPA4247 1793 SVGA CPA4112 2093 CGA S CPA4231 2793 VGA B CPA4235 1493 CGA CPA4250 1793 SVGA N CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA O CPA4224 2093 VGA U CPA4172 3693 CGA D 4252 1493 SVGA J CPA4255 1993 VGA P CPA4227 2093 VGA V 150 XFR 75W E CPA4243 1793 VGA K CPA4249 1993 SVGA 4108 2093 VGA W 150 XFR 100W F CPA4244 1793 VGA L CPA4256 1993 SVGA R CPA41
175. onnected to the base of this transistor Diode conducts the inductive current from the vertical yoke during the first part of retrace A jumper at replaces the capacitive multiplier circuit in the chassis with smaller CRTS HORIZONTAL DEFLECTION CIRCUIT DESCRIPTION 24V to 27V Supply 12V Supply 3 92K Remote Control PCB Horizontal Position 56pF 7 3VDC 352 5 5Vpp 01 D6 The functions of the horizontal control circuits are 1 To providethe horizontal output circuit with a stable frequency with or without incoming horizontal sync 2 To be ableto adjust the picture position horizontally with respect to the raster 3 To operate stability through periods of missing horizontal sync pulses 4 To keep the picture from drifting within the operating temperature range of these functions except for the picture position adjustment are accomplished by the phase locked loop Delaying the horizontal sync with an adjustable timer produces the picture position adjustment Thehorizontal sync input circuit pin 1 will trigger the picture position one shot O S on either the rising edge or the falling edge ofthe horizontal sync pulse To accomplish the edge triggering the sync pulse is differentiated by capacitor into two short pulses one for the rising edge and one for the falling edge of the sync pulse Which edge is thetrigger depends on the bias voltage at pin 1 For positive edg
176. ors amp J14 This current is transmitted to the power supply V line and is applied toa resistor 45 J15 amp J16 The voltage across these resistors is compared to a reference voltage by the error amplifier If the 127V line goes up the output of the error amplifier voltage goes up The pulse width modulation which controls the 127V line voltage is accomplished by turning the FET drive on at some particular voltage along the rising slope of the oscillator waveform This particular voltage is the error amplifier output voltage See waveforms above TheFET driveis always off during the negative slope of the oscillator or just after the sync pulse SincetheFET drive pulseis started by the error amplifier voltage and terminated by the end of the oscillator cycle a control system via pulse width modulation has been established The oscillator waveform is produced by charging capacitor with a constant current set by resistor to a voltage of 5V and then discharging the capacitor with double the charging current to 2 5V Adding the flyback pulse via capacitor to this waveform synchronizes the oscillator since the oscillator frequency is set below the horizontal frequency Resistors J2 and capacitor limit the error amplifier s AC gain to hold the control loop stable Capacitor holds the error amplifier stable Capacitor reduces power supply noise but if too large will causethe power supply tobeunstable The 127V lineis
177. ors and is filtered by capacitor Resistor then connects the signal tothe current node of the control amplifier which accomplishes the blooming correction function These circuits are designed around a virtual ground the 46 volt line This lineis generated by buffering a voltage divider and with an OP Amp Resistor and capacitor form the output filter The power output stage of the horizontal width control circuit is a high efficiency switching mode driver TheFBT pulse is integrated by capacitor through resistor and level shifted by resistor to produce a saw tooth waveform See waveform block TP 39 By connecting one input of the comparator in the LM 392 049 to this sawtooth signal and the other input to the control amplifier a switched signal with a duty cycle dependent on the control voltage is produced at the output Resistors and 056 form a voltage divider which limits the control voltage amplitude to be within the sawtooth waveform Resistor acts as a pullup for the comparator output Resistor couples the power MOSFET tothe comparator Capacitor and resistor are connected as a snubber circuit to reduces noise due to rapid drain transitions When the MOSFET is on gate voltage high current increases in inductor and when the MOSFET is turned off the current is dumped in tothe 24 27V linethrough diode 462 magnitude of this current from the diode modulator is determined by the duty cycle of the MOSFET which is a f
178. ower supply comes from a secondary in the power transformer and depends on some primary current to generate secondary current 12V regulator is used to supply current to all the control circuits in the monitor with the exception of the power supply Many of the control circuits are decoupled from the 12 volt line with a resistor or diode to minimize noise from common current loops The Over Voltage Protect circuit is built into the power supply and monitors the flyback transformer peak pulse voltage This circuit will turn off the power supply and hold it off if the EHT exceeds its maximum rated value Since excessive X ray output occurs with excessive EHT this circuit provides X ray protection The Fault Detector senses beam current and temperature This circuit will activate the power supply shutdown circuit if either the maximum temperature is sensed or if the beam current becomes large enough to threaten the FBT The Degaussing circuit is connected across the isolated AC line A posistor is used to allow a large current to flow in the degaussing coil on power up This current is then gradually reduced by the increased temperature of the positive temperature coefficient thermistor in the posistor A relay is used to short the degaussing coil after the degaussing operation This greatly reduces posistor residual current in the degaussing coil When repairing a monitor the degaussing coil should be unplugged to avoid possible damage to
179. p the FBT from overloading will reduce the video gain if the maximum average beam current is exceeded Also the beam current is reduced if the FBT approaches maximum operating temperature The Sync Interface can accept separate or composite sync Two comparators are used to receive sync one for vertical sync and the other for horizontal sync Resistor dividers are used to protect the comparator IC from over voltage damage For customers who do not require interlace an additional vertical sync stabilization circuit is included This circuit synchronizes the vertical sync to the horizontal cycle The Vertical Oscillator generates the vertical free running frequency when no vertical sync is present When sync is applied the vertical oscillator synchronizes to the leading edge of the sync pulse The Vertical Control amp Output circuit consists of 1 One shot 2 Ramp generator 3 Vertical drive 4 Vertical output The sync pulse from the LA7851 triggers a one shot in the LA7838 which clamps the vertical ramp generation capacitor to 5V during the first half of vertical retrace The ramp generation capacitor then charges via a constant current set by an external resistor This resistor is connected to the V SI ZE pot located on the remote control board for the vertical size adjustment The vertical drive is a differential amplifier which compares the ramp voltage to the yoke return feedback current The yoke feedback current and vo
180. ransients The zener diode which is connected from the Mos Fet source to gate protects the Mos Fet gate against over voltage Resistor Output r519 is needed to limit the mains current when the relay arcs across both sets of contacts Capacitors and reduce the relay contact noise which may be generated when switching Shield YEL GRN Brown CPR0425 BLK T506 1N 4007 T502 60 45A 250V YEL WHITE TZL200B 200Vz T503 120VAC output to monitor 1 5uF 400V 1512 Isolation 120 or 240VAC Transformer 33K 5 50 60Hz input 1 4W CF WHT power T504 1N4007 1 4007 1510 1511 0 1uF 365K 1 DE IRF520 OPTIONAL WIRING P6KE27A RTE 24024 SATIRE 27V TVS Tog 1516 PERRE MEL MOTE Blue T518 WI 240VAC output to monitor BLACK ISO XFR 75W ISO XFR 100W PCB RED YEL PCB 500 White YEL Ground CAUTION Q Output REPLACE WITH SAME TYPE FUSE AND RATING ATTENTION UTILIZER UN FUSIBLE ORG DE RECHANGE DE MEME TYPE ET CALIBRE Black BLU y LF GRY 2 Connect ORG to RED for BRN Blue Input 230VAC output Brown Input lt d oD io S 514 1 C WHT 520 BLK Note The T in front of the board numbers refers to this PCB ORED Q YEL GRN Whit Ground PCB 500 02 501
181. rcuits when there is a fault in the monitor which disables the power supply The appendix includes filament voltage test convergence procedure replacement parts purchase order form degaussing coil attachment specification high pot test wire routing drawing production assembly drawings PADs amp K film resistor arrays and a parts list addendum The parts list addendum is used to add new information describing part changes Tables suitable for pasting on these pages will be published as new variations of the XX93 monitors are produced Ci TABLE OF CONTENTS About This Maul S t UT e 11 CERONIX Monitor Simplified Block 1 Installation Instructions English French and 2 4 CERONI X Monitor Electrical 1 1 1 nnn 5 9 1493 1793 1993 2093 2793 3693 General Operation Description Video Interface Amps amp Beam Current Sense Blocks 9 Auto Bias Bias Sync Delay amp Auto Bright ines 10 CRT Blanking Sync amp Vertical deflection Blocks sn en 11 Horizontal Deflection amp Remote
182. repair XX93 Monitors Hereis a guideline in which this handbook will follow 1 Color problems Always wear safety glasses 2 No video with power AN Caution Use only one hand 3 NoV H when working a powered up 4 Retrace lines monitor to avoid electrical 5 No power shock Color Problems A helpful hint when working with color problems is by identifying the color of the three grid lines at the top of the screen When there is a missing color and thelines are white the problem lies in the video interface section This means it can be found between the customers game and pin 8 of the Video Amplifier K Film If thelines are not white it would be a output problem which is anything after pin 8 tothe picture tube If the problem is excessive blue green or red background color tap on related film to see if it is defective If blue is the problem check for damaged traces around the outside of the video board since most of these traces go to the blue K film If monitor shuts down due to excessive color disconnect the filament for voltage tests Desolder CRT socket pin 9 Note All voltage measurements are DC with lead to GND unless other wise noted l Check voltage on 752 input If OV to 05V check video Missing resistors 288 286 amp 284 connector and drive electronics Color Refer to the less than 7V amp K Films pin 1 gt 8V associated K Film schematic for the specific pin If voltage
183. roduziert Die X Strahlung die vom Anode Birne Kontakt ausstr mt ist viel h her als vom Gesicht das zu weniger abschirmen passend ist X Strahlung ist direkt zum Lichtstrahlstrom proportional Sie verdoppelt f r jede Zunahme 1 3KV der EHT Spannung am Gesicht und verdoppelt auch f r jede Zunahme 3KV des EHT am Anode Birne Kontakt Von diesen Informationen sollte es beachtet werden wenn man Monitorelektronik instandh lt in der die R ckseite des Abbildung Gef es die Service P erson gegen berstellt da der Lichtstrahlstrom unten gedreht werden sollte um berm ige Ber hrung zu vermeiden Wegen der Zunahme der X Radiationemission mit Zunahme der EHT Spannung ist es wichtig da die EHT Spannung berpr ft wird Die EHT Spannung messen Schlie en Sie die Leitung eines Voltme instruments an das Monitorchassis an damit eine zuverl ssige Beziehung hergestellt wird Schlie en Sie eine ochspannungspr fspitze an den Input des M efsinstruments und am Anode Kontakt des Abbildung Gef es an Das EHT sollte nicht 26KV bei 0 Lichtstrahlstrom bersteigen CERONIX XX93 Monitor Part List 45 A CPA4233 1493 CGA G CPA4247 1793 SVGA M CPA4112 2093 CGA S CPA4231 2793 VGA 4235 1493 CGA CPA4250 1793 SVGA CPA4166 2093 CGA T CPA4254 2793 VGA C CPA4200 1493 VGA CPA4221 1993 VGA CPA4224 2093 VGA U CPA4172 3693 CGA D CPA423
184. s 101 Replacement Parts Purchase Order menn 102 1493 Degaussing Coil Attachment 5 103 1793 1993 2093 Degaussing Coil Attachment 104 2793 3693 Degaussing Coil Attachment 105 HighPot for Shock Hazards Circuit Description English sseeeee 106 HighPot for Shock Hazards Circuit lt 1 107 Wire cas cenam acc quic nd ta bre ca aaa 108 Preeis onrResistor Tr a 109 Pred sion E5SIStOE ATE aya an ne Fe cl rd V ra dne Faro 110 Precision Resistor ATTSV an aaa 111 Vertical Deflection Amplifier Booster Technician Assembly Drawing 112 Monitor Input Drive Signal 113 Dedaratton ol Con orny aaa aas 114 ISO XFR 75W and ISO XFR 100W Safety Isolating Transformer 115 Circum PEON EDSIISPU innen Aul eec b 116 Auto Voltage Select Schematic and Assembly 117 EIFCUNEDESERIPEION GEFIMAN Er ee an 118 m Pls c ER b b kd 119 121 BIOSC
185. s the chance of arc damage to the transistor For the 31K Hz case the vertical oscillator one shot signal is directed tothe dear of the 7 bit counter This O S time out must occur after the autobias delay time out and come before the bias active pulse from the CA3224E When the dear is low the counter counts horizontal pulses by the dock connected voltage divider and 201 When the counter outputs ones at each diode connected output further counts are inhibited by CD4024 100 diode 006 and pullup 381 This diode or signal 200K L iuF Autobias 058 is also used for the CRT auto bias vertical sync 15 8 The delay is set to locate the grid pulse generated paa delay grid pulse g 101 Noad i 3 faint lines at thetop of the screen with full Retrace Boost Filament 091 124V vertical deflection Capacitor produces a delay to avoid a race condition between the counter Vertical Osc O S LA7851 pin 16 clock and the auto bias horizontal sync G2 CRT AUTO BIAS AND AUTO BRIGHT SCHEMATIC 100K 1 2W FBT 2 2K 1 2W 10K 1K 881 873 855 330pF 1 000pF AUTO BRIGHT CIRCUIT ERT 956 Adjust the bottom pot FDH400 10 12V Beam current off on power down circuit 68 1K m y UF ev 127K on the FBT for 4 2V 2503675 M 920 0871 On main 987 board at DD1 9000 Green amp Red BEAM CURRENT VIDEO P INTERFACE video Amp AUTO BIAS IC GND Vcc CA3224E 92
186. se is allowed to be the vertical sync pulse For positive vertical sync pulse transistor IS turned on by resistor amp 256 which shorts the base of transistor to GND also allowing the window comparator pulseto act as the sync pulse A sawtooth waveform is produced on integrating capacitor by applying the flyback pulse to resistors amp 357 This sawtooth waveform is connected to two comparators which are biased by resistors 353 356 354 amp such that both comparator outputs are high between 1 8 voltsto 2 3 volts This circuit would produce a pulse on both the positive and negative slope parts of the sawtooth waveform Resistor eliminates the output pulse on the negative slope by introducing part of the flyback pulse to pin 8 which keeps the comparator from going high at this time Resistors amp act as a pullup for the window comparator and apply a 6 volt bias to the vertical sync input LA7851 pin 19 At 6 volts the vertical sync input is inactive It becomes active only when the window comparator output and the sync transistors are all high VERTICAL DEFLECTION CIRCUIT FUNCTION DESCRIPTION TheLA7851 IC is used for the vertical oscillator TheLA7838 is a vertical deflection control and high efficiency vertical yoke driver IC Together they form a compact and efficient vertical deflection system SIMPLIFIED VERTICAL DEFLECTION CIRCUIT Vertical Sync Vertical Oscillator 2 LA7851 Vertical Linearity Fi
187. supply VIDEO GAIN LINE VIDEO INTERFACE beam current From FBT High Temp 12V Beam Limit 28 0K IN 4148 020 018 036 tL 10uF 100K 071 JE 4 The video P P voltage amplitude at the cathodes isthe video input signal amplitude times the master gain control setting times the video amplifier gain Thegain select resistors set the maximum video gain via the master gain line Fora greater range of brightness highlighting the video system is allowed to supply high peak video currents which could damage the FBT if sustained The beam current limiter circuit insures that the long term maximum beam current is not exceeded Horizontal blanking is achieved by amplifying the flyback pulse F BP with transistor 072 Vertical blanking starts as soon as the LA 7851 starts the vertical retrace sequence and is terminated by the auto bias bias active signal A comparator is used to sensethe vertical bias O S at pin 16 of the LA7851 which goes low when vertical retrace starts Capacitor holds the vertical blanking active between the vertical bias O S pulse and the bias active pulse When the bias active line goes high the capacitor is reset and vertical blanking ends after the bias active line returns toit s high impedance state GS BLANKING MASTER GAIN AND FAULT CIRCUIT DESCRIPTION The master gain control Is connected to the video gain linethrough a IK resistor 062 The voltage range of the video ga
188. t OT d 4 eaten p ST i 00 523 lt 219 08 217 amp 100uF N 2 4 RR 209 Saft Ei 100 H400 2137 A of ER aa Ven Set el a IMP NI ER N NT MP ISA 2 Ka 3 yb 377 LA7838 V Booster Amp 0 127K 388 4 2 0938 c moan ee P mm dail ov KM 1 141 u lt A OTST OR E T pua T ooa sae fo ole of JE 0 Sn NAD AR N Jaa 1 sl gt 64 90 2261 Gia lt 2222 37 28 0K 402 zov m Tc P ey Sis a 227 C A LO t e 19317403 1K 4031 39 G le N E 48 a 9346 A A k o 200K 372 i S n z gt 40 1 Wy S 258 241 x lt i PS PEE P T500K 371 H 193 1K 404 di voit 4 A g 228 SIR i e NE A 1414 5 15 8 231 CO SA 714148 405 co 5 LO 54 90 232 s 7 zm 2907 4148 406 Lm ig X FBT 453 i N 62K 407 cr C Bf m ma 233 9 eee 420 S2 Sb gt A4 FBT Hitachi BW00272 CPT1516 Pr z B34 Lo ko NE 115 8K 408 x Yoke Connector 093 Pins ua 7 15K 366 410 lt e IDA un 00 235 U E F jq lt 255 ci 55 VRR 17 15
189. t of the differential amplifier at pin 7 A capacitor smoothes the parabolic waveform and a voltage divider is used to set the output bias voltage Thetime constant of the capacitor and resistor 392 is set to produce good vertical linearity An additional linearity correction circuit is added to fine tune vertical linearity This circuit can be set to add or subtract deflection from the upper and lower portions of the raster The differential amplifier controls the power output stage which drives the vertical deflection yoke The retrace booster is turned on when the ramp voltage is set to the damp voltage and is reset when the yoke feedback voltage balances the ramp voltage VERTICAL DEFLECTION CIRCUIT DESCRIPTION LA 838 E Vertical Deflection Vertical Size Vertical Raster Position RC3 12V SUPPLY VERTICAL SYNC 5 The vertical sync comes from the synchronized vertical sync interface circuit for monitors without interlace For monitors with interlace the vertical sync comes from the sync comparator via a coupling capacitor and bypasses the synchronizing circuit Pin 19 of the LA7851 is the vertical syncinput and will start the next oscillator cycle on either the positive or negative sync pulse The vertical oscillator capacitor discharges to 4 volts on the leading edge of the vertical sync by the action of an internal transistor and resistor Capacitor is then charged by resistor until the next sync pulse or
190. the screen grid G2 to hold the the video amplifiers to set the correct black level voltage for each gun This color balance If the picturetube gain changes the auto common bias voltage constant SIMPLIFIED PICTURE TUBE VIDEO BIAS CONTROL CIRCUIT One channel shown H DEO Vidas lu G INTERFACE Amp B CRT u CA3224E BEN S G2 Beam iur Auto Bright Current Ampl ifi a BT Buffer 5K 921 creen adj 4 0V VIN i TC 9 2000 047 1 169K 68 1K 9000 6V V sync Decod sync 2 p ji Program Pulse n 1 8K 21V Adjust FBT bottom pot for 4 0V to 4 4 at pin 8 Note Chassis before rev E4 set to 4 6V The auto bias circuit performs all of its which if the bias was correct during the sensing and bias corrections during the previous cycle exactly balances the voltage sixteenth to the twenty first horizontal cycle stored in the coupling capacitor and no after the vertical sync pulse Beforethe difference is sensed at the channel input The sixteenth cycle the SW in the auto bias IC is channel amplifier in this case does not open SW in C position output current and the voltage of capacitor stays unchanged Duringthe 16 17 and 18 horizontal cycle y 9 the CRT is brought out of cutoff by the grid If the CRT cathode is too far into cutoff less pulse Theresulting beam current produces beam current flows at the grid pulse time a voltage at the beam current buffer output This causes th
191. to 8 volts which ever comes first The V osc frequency is set low such that the adjustment resistor can be used to act as a vertical hold adjustment Solder connection V iS used to make this adjustment The vertical oscillator triggers the vertical oscillator one shot which outputs a pulse to trigger the vertical sync input pin 2 of the LA7838 This one shot is also used to synchronize the CRT auto bias IC Resistor amp capacitor set the timeout which must be longer than the CRT auto bias Vs delay and shorter than the vertical blanking Resistors amp Supply the pullup for this one shot 5 5 6 5V 1 2Vpp 19 D5 H 1 2V VERTICAL 5 5 6 4V 3Vpp 21 05 5 6VDC 11 4Vppl22 E5 5 5 6 5V 1 4Vppl23 F4 18921 41390 127K 01uF 1 3VCD 4 6VDC IVs LEGVDC VS 2 8Vpp 18 D5 17 VERTICAL VERTICAL a VERTICAL SYNC INPUT OSCILLATOR OSC O S one shot in the LA 7838 clamps the ramp forming capacitor to 5 volts for about half of the vertical retrace time Capacitor and resistor form the RC circuit for the ramp reset one shot The ramp capacitor is charged by current from a current generator with a 6 volt input node at pin 4 The vertical size is adjusted by the vertical size control which is connected to pin 4 via resistors amp 375 The adjustment range is set by resistor and the maximum deflection is set by resistor 403 A third tnput to pin 4
192. unction of the control voltage Diodes and with current equalizing resistors and rectify the flyback waveform present on the GND referenced node of the horizontal tuned circuit This current is conducted through inductor 457 and integrated by capacitor and then is controlled by the driver circuit Diodes and are the diode modulator diodes and the forward current which the drive circuit controls is the current which determines the turn on delay of the GND referenced node of the horizontal tuned circuit An increasein the current of diodes and produces a greater delay in the GND referenced node and reduces the amplitude of the fl yback pulse at this node which results in an increased horizontal size Capacitors and arethe primary horizontal tuning capacitors and must bethe specified valuefor a given chassis horizontal freguency and yoke combination for proper operation of the monitor Capacitors and arethe diode modulator horizontal tuning capacitors Diodes and 438 d amp the GND referenced node voltage to GND Horizontal linearity Coil stores energy from the flyback pulse and injects it into the horizontal yoke in the reverse direction of the yoke current to decrease deflection at the start of trace to balance the decreased deflection at the end of the horizontal trace due to R losses the yoke during tracetime Capacitor and resistor keeps the linearity coil from ringing after retrace Theraster may be shifted by making sold

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