Super Vision IV and 630/640 - Service Manual
Contents
1. 22 578 nep tuo Only horizontal line Only a horizontal line Vertical defletion circuit E Service switch S601 turned NO OFF P Turn OFF service switch 601 YES 1C701 C603 C605 C604 C617 C618 8607 20601 R603 Vertical oscillator circuit R604 VS701 3 2D602 metto ceder th Yw lt Check vertical oscillator circuit oscillating 1C701 ee YES UK 0601 0602 0601 0602 R611 NO Check vertical output PN R615 C616 R619 R621 R617 circuit 3 607 C608 C609 C611 R606 _ VS701 VS701 R605 R618 Vertical output circuit output e esta Imma YES Check deflection yoke 9 222 picture _ Set CONT to MAX Input signal fully entered YES Check video circuit NO IC101 output 01 to Os 5 27711140 0141 Contrast circuit input output NO velteges normal YES Q143 Blanking circuit input output NO voltages normal BE YES 4101 Q131 0161 Video buffer circuit in NO put output voltages normal YES Q851 Q856 NO 2 Video output circuit output YES Check CRT2. 24 1 SUPER VISION J 127 COLOR DISP P IMPORTANT SERVICE SAFETY Operation of monitor outside of cabinet or with back removed involves a shock hazard Work on these models should only be performed by those who are thoroughly familiar with precau tions necessary when working on high voltage equipment N Exercise care when thie ahasi with applied B plus and high voltage RF terminals are exposed which if carelessly contacted can cause serious shock or result in dam age to the chassis Maintain interconnecting ground lead con nections between chassis escutcheon and picture tube dag cluster when operating chassis Adj Control in this monitor is sealed in order to protect the user f rom X ray irradiation The B Adj Control should not normally have to be adjusted But ifit is or if it is replaced due to damage check the B voltage to sure that It js within specifications after adjustment Then seal this control according to the manufacture s specifi ication N Certain HV failures can increase X ray radiation Monitors should n not be operated with HV levels exceeding the specified rating for the chassis type The maximum operating V specified for the chassis used in these monitor is 22 KV at zero beam current with a line voltage of 120V
3. R857 R859 R861 _ R878 R879 R880 R726 R930 R610 R860 R862 R129 _ 8928 R881 R883 R882 R722 R921 R728 R734 R738 730 2 _ 723 R723 _ R309 R858 R620 e R854 8855 R856 R631 633 R926 R927 R630 8632 8618 R615 8616 R955 R956 8733 R923 R924 R925 R920 R922 R851 R852 853 R875 R876 R877 R832 8802 R720 _ ohm 10k ohm 13k ohm 15k ohm 15k ohm 18k ohm 22k ohm 22k ohm _ ohm 2 75k ohm 150k ohm 180k ohm 180k ohm 270 ohm 4 7 ohm 100 ohm 680 ohm 1k ohm 1 8 ohm 2 2k ohm 2 2 7k ohm 3 3k ohm 3 9k ohm 6 8k ohm _ 6 8 ohm 0 _ 30k ohm 39k ohm 3 9 kohm 23 9 kohm 4 7 ohm 39 ohm 56 ohm gt _ 150 ohm 470 ohm _ 470 ohm 470 ohm 680 ohm 1 1k ohm 3 3k ohm 4 7Mk ohm 18k ohm 68k ohm 120k ohm _ 1 ohm _ 39 ohm 910 ohm 910 ohm 2 3 3k ohm 8 2k ohm 33kohm 5 6k ohm 114 W PARTS LIST Ratings 18W 118 W 18W 1 8 W 1 8 W 1 8 W 1 8 W 1 8 W 1 8 W 1 8 W 1 8 W 1 8 W 1 4 W 1 4 W 1 4 W 114 W 1 4 1 4 W 14 W 1 4 W 1 4 W 14 W 114 W 1 2 W 2112 W 1 2 W 1 2 W 1
4. HV INTERLACING CONTROL VR301 1C301 1 302 V OUT CIRCUIT TO VIDEO AMP SYN IRCUIT won T REGULATOR 4 DEFLECTION COIL Lx TO V FREQ CIRCUIT BLANKING FREQ HIGH OUTPUT VOLTAGE PROTECTION H SYNC IN NE OUTPUT 0601 602 Dd ee V SYNU IN V FREQ IM LEE BLOCK DIAGRAM Version gt LIN ae TO H OUTPUT CIRCUIT TEL 00000 AUTO DEGAUSS A 1 oo 5 2 VOLTAGE SWIT TO H DRIVE CIRCUIT nc CHING REGULATOR PUE 6901 0520 TO FREQ CIRCUIT TO VIDEO OUTPUT CIRCUIT nee 2 0 COLOR BUFFER 0101 VIDEO E G BUFFER 0131 INPUT o IC 101 EE d O 0140 141 _ B BUFFER 0161 _ AUTO DEGAUSS BLUE OUTPUT COL 0853 0856 BRIGHT CONTROL VR140 0171 CONTRAST CON TROL VR141 SYNC INPUT H or H V 6Vrms 500 900 gt BLANKING Q143 5 6 kV 22 kV LETTER QUALITY 75 TO OUT CIRCUIT CONTROL 301 VR301 IC301 E 0302 12V TO VIDEO AMP CIRCUIT SYNC PULSE POE O
5. Higher voltage also increase possibility of failure in H V supply It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the monitor that could cause a rise in high voltage or operating supply voltage No changes should be made to the original de sign the monitor Components shown in the shaded areas the schematic diagram and or identified by the placement parts list should be replaced only with exact Factory recommended replacement parts The use of unauthorized substitute parts may create shock fire X ray radiation or other hazard To determine the presence of high voltage use an accurate high impedance Vmeter connected between the second anode lead and the CRT dag grounding device When servicing the High Voltage System remove static charge from it by connecting a 10K ohms resistor in series with an insulated wire such as a test probe between picture tube dag and 2nd anode lead AC line cord disconnected from AC supply The picture tube used in this monitor employs integral implo sion protection Replace with a tube of the same type number for continued safety Do not lift picture tube by the neck Han dle the picture tube only when wearing shatter proof goggles and after discharging the high voltage completely Keep others without shatter proof goggles away
6. a t ent R881 R854 R857 R878 VR801 L854 C851 C854 C857 C803 D854 D851 _ 2 Green video circuit R882 8855 R859 8879 VR811 1855 C852 855 C858 C802 D855 3 Blue video circuit i R883 856 8861 R880 VR821 1856 C853 C856 C859 D856 0853 20 E 3 Troubleshooting Gz No raster 1 Troubles in the ower circuit horizontal deflection circuit Ried produced when BRIGHT Confirm BRIGHT CONT A di CONT is set to position 27 E a a se Power circuit horizontal DC voltage across C901 Check primary rec j circuit fault pt ES circuit 22 ws 4B voltage normal 115 Check B Sonne section ae id 512 i 2 secondary rectifier circuit BSR bon 630 640B A 340 VOC d 2 630 640U AES Ux m 3 630 640 J 5 701 15 Horizontal oscillator circuit NO Check horizontal oscillator 701 VS701 C732 circuit x C703 R703 R704 F701 YES Q702 base I R723 R720 R721 R722 R731 R732 Horizontal drive circuit Check horizontal dive R724 Q701 1701 709 710 output C780 0720 20702 0721 2 D722 2 0723 2 R731 3 5 Check horizontal output Q702 C711 C717 C718 C719 C720 1701 DY FBT L702 1703
7. pull out the main Fig 3 2 Re assemble in reverse order PICTURE TUBE REMOVAL The main PWB must be removed before attempting to remove the pic ture tube Loosen the screw 9 and remove the convergence magnet assembly Fig remove the Deflection Yoke Fig Remove the four screws f at the corners of the picture tube and D carefully remove the tube Fig 4 1 Re assemble in reverse order 3 1 n MN f rr Epargne tg e WERE CHR I t rr lt urT ruJs SINGER ED CRP EST HE i E Qt vA L Ye y OUTPUT CIRCUIT AUTO DEGAUSS TH901 VOLTAGE SWIT To H DRIVE CIRCUIT CHING REGULATOR IC901 0320 FREQ CIRCUIT RED OUTPUT AMP 2 TO VIDEO OUTPUT CIRCUIT 0851 0654 RO COLOR BUFFER 0101 E GREEN OUTPUT e M E AMP Q852 Q855 VIDEO M xe d BUFFER Q131 a INPUT B O4 101 d 1 O _ 9140 _ BUFFER Q161 ation BLUE OUTPUT COR sce Q853 Q856 T CONTRAST CON BRIGHT CONTROL SIDE PCC i TROL VR141 VR140 Q171 CONTROL 2 VR640 T SYNC INPUT H or H O m _6 500 900 V M BLANKING CIRCUIT m 9 143
8. 2 Remove the two screws Dfrom the _ bottom the two screws from the top and the three screws G from the rear of the set Fig 1 1 3 Remove back cover 4 Re assemble in reverse order NOTE Tilting the front block by 45 helps when re assembling back cover Fig 1 2 LE 2 SERVICING THE POWER SUPPLY BLOCK LM E 1 Remove the screw Fig 1 2 _ 2 Disconnect power supply connectors _ gt _ Fig 2 1 NOTE Connector names are as follows _ I Power Connector _ Power Switch Connector 1 Auto Degaussing Connector IV B Connector _ 3 Remove the screw take off the C holding metal plate Fig 2 1 4 Remove the screw and slide the power supply PWB to the front Fig 1 2 Fig 2 1 m 58 Reassemble in reverse order 3 4 5 B 4 e Q Gg 2 EN LEE 43 amm e 2 n s d 4 p E o 1 2 Loosen the screws ij and PWB MAIN SERVICE After removing the back cover follow this procedure Fig 2 1 to allow easy access to the main PWB Disconnect CRT anode lead 8 CRT Socket 9 Connector coating earth and connector D Y Fig 3 1 Remove the two screws 2 08 Psi Fig 152 5 Veo 2050 Take off the lead clamp b c d Fig 3 1 Fig 3 2 1 PWB holder R L will open both side
9. C902 C903 C904 C905 C907 C955 C612 C709 C710 C712 C610 C851 C852 C866 _ C923 C927 C805 C925 e C924 _ 182 C183 C C603 C113 C730 C110 C940 267112 C703 C722 C706 C705 C73 C605 C731 C301 C922 5 780 C723 721 719 0103 0104 0105 0111 i D112 D113 C906 C956 C859 C944 C184 180 pF 220 pF 560 pF 680 pF 0 01 pF 0 01 pF 0 01 px 0 01 pF 1000 pF 4700 4700 pF 4700 pF 4700 pF 1000 pF 1500 pF 3300 pF w 247 pF 47 pF 1 pF _ 33 pF 33 pF 120 pF _ 180 pF 330 pF 5600 pF 2200 pF 0 01 pF 0 022 pF 0 033 pF 0 047 pF 0 1 pF _ 0 033 pF 0 1 pF 0 12 pF 0 012 pF 0 01 aF 151040 051040 1051040 951040 US1040 27 180pF 220 pF 820 pF 4700 pF C853 Ratings 50 V f 50 V 50 V 50V 50 V 50 V 50 V 22125 V _ 400 400 V _ 500 V 500 V 500 500 V 500 500 V 500 V 500 V E 1k V Jk V 1k V _ 50V 50 25 V 50V 500 V 50 V 2500 V 2500 V 50 V 50V 50 V 50 V 50 V 50 V J B0V 50 V 125 V 100V _ 200V 200V 630 V 630 V Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic
10. Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic _ Ceramic Ceramic Ceramic po Ceramic Ceramic Ceramic Ceramic Ceramic _ Ceramic Ceramic Ceramic Polyester film _ Polyester film Polyester film Polyester film Polyester film _ Polyester film Polyester film Polyester film Polypro Polypro Polypro Polypro olypro Silicon Silicon Silicon 0 for Version 1 for Version 2 Parts no 0244116F 0244230F 0244115F 0244117 0244105 0244171 _0244171 150261 0249159 F160033F F160041F _ F160042F O244565F 0244565F_ 0244565F F160102 F160104 F160108 0248676 0248676 0292706 0248676 F160078F 0244228F 0243839 0243837 0279211F F150118F F150126F F150126F F150130F F150134F F150244 0299926F 0299927F 0299982F 0299981F F380201 F380201 F380201 F380201 F380201 Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode 2 Diode Diode Diode Diode Diode Diode Diode Diode Diode Zener diode Zener diode Zener diode _ Zener diode Zener diode Zener diode Zener diode Zener diode Zener diode Transi
11. Check blanking circuit Check signal source and signal cables 0142 5 V power circuit normal YES Check 1 10 1 peripheral circuit C143 Check contrast peripheral circuit chiding 0140 _ 9141 VR1 41 Check video buffer circuit including 0101 Q1 31 161 and VR142 bright peripheral circuit Check video output peripheral circuit including Q851 to Q856 M Check 5 V circuit Q142 20140 R144 C142 0143 D105 0136 0166 e Resistor Resistor Resistor _ Resistor Resistor _ Resistor _ Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor _ Resistor Resistor _ Resistor Resistor Resistor Resistor Resistor Resistor _ Resistor Resistor Resistor Resistor s Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor e Resistor Resistor Resistor Resistor Resistor Resistor Resistor R640 R641 R887 R888 R103 R113 R114 R611 R732 R872 R811 821 0 8752 R140 R134 R135 R136 R164 R165 8166 R174 R176 R178 R180 R183 R184 8107 139 R124 R169 R172 R609 R304 8305 81
12. When removing springs or md mounting parts from the chassis shatter proof goggles must be worn others without i E goggles away SAFETY INSPECTION ees ee Before returning the monitor to the user perform the following safety checks INFORMATION Super Vision IV IVM UM ak Super Vision 640 630 PROTECT YOUR CUSTOMER cet l Inspect all lead dress to make certain that leads are not pinched and that hardware is not lodged between the chassis and other metal parts in the monitor 2 Riesa all protective devices such as non metallic control knobs cabinet back adjustment covers shields ete _ 3 To be sure shock hazard exists a Ee for the pres ence of leakage current should be made at each exposed metal part having a return path to the chassis jack cabinet metal screw heads knobs ts etc Jin the Plug the AC line cord directly into 20 receptacle Do not use an Isolation Transformer during these checks All tests must be repeated with the AC line cord plug connections re versed If non polarized adapter plug must be used for the purpose of completing these checks Do not other wise operate the monitor with an adapter If available measure leakage current using an accurate leakage current tester reading of 0 35MA or more is excessive and indicates a potential sh
13. 8 1 8 W 1 8 w 1 8 W 1 8 w 1 8 w 1 8 W 1 8 W 1 8 W 1 8 W 1 8 W 1 8 W 1 8 W 1 8 118 W 118 1 8 W 1 8 W 1 8 W 1 8 W 118 W 2118 W 1 8 w 1 8 W 1 8 W 18 W 1 8 W 118 118 W 1 8 W 1 8 W 1 8 w M8 w ez l Ratings Carbon film Carbon film Carbon film Carbon film _ Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film _ Carbon Carbon film Carbon film Carbon film _ Carbon film Carbon film Carbon film Carbon Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film 01000087 01000023G 010000256 01000033 01000033 01000035 01000037 01000041 01000041 01000041 01000041 gt 01000041 01000047 01000051 01000051F 01000053 01000053 01000055 01000065 01000065 Version 1 for Version 2 0
14. 2 1 2 W 1 2 112 W 1 2 W 1 2 W 2112 W 112 W 1 2 W 1 W TW gt 2W 2 W 2 W 2 W 2 w 5 W 20 for Version 1 for Version 2 01000089 Carbon fim 010000896 Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon Carbon film Carbon film Carbon film Carbon film Carbon Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film _ Carbon film X Carbon film _ Carbon film _ Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Metal oxide Metal oxide Metal oxide Metal oxide Metal oxide _ Metal oxide _ Metal oxide 01000092 Fo20084T 010000936 010000956 01000097 010000976 01000101 01000110 010001176 01000119G 010001196 01000117 0114009T 0114015 0114131T 0114151 01141617 01141677 0114169 01141717 0114173 0114175 20114181 _ 0114181 0114212 0114215 F020014T 0100007 F020088T F020038G 2020042 20200526 2020064 Fo20064T 20200646 5020068 20200736 Carbon _ Metal Metal oxide Metal oxide Metal oxide A Metal oxide F02008
15. L724 0141 1745 1857 710 1901 1902 L702 L703 854 L855 1856 L851 1852 1853 1151 L152 1153 1154 1155 T701 T702 T901 T703 S101 S601 S102 101 9 1 TH901 F701 F901 F901 PARTS LIST Ratings 2SC655C D 2SC655C D 25 3179 6 2SC2911 S T 25 3026 2503864 2501207 _ 2 0468 2501397 Heater choke coil 0 35 pH Filter coil 22 4H Filter coil 100 uH Filter coil 3300 zH Line filter SIZE H LIN 4 7 pH Axial pH Axial 100 zH Axial 100 pH Axial 100 uH Axial DRIVE u Pin cushion transformer Switching transformer Flyback transformer switch I SLWK22 _ Multiple switch J K2188 TCS4480 01 1011 PTC thermister 120 thermister 200 Fuse TSCRO 63A 00 Fuse ST3 3 15 A Fuse SET 3 15 F360141 F360151 2360341 2360121 F360231 F360161 _ 2360171 2120333 2122094 2120482 2120484 F330051 F320043 320052 21222357 2122239T 2122253T 21222535 2122253F _ 2260071 F330041 F290074 F310053 F470081 F470031 F470051 F500051 F400001 2340471 _ F690031 2720902 2720402 for Version 1 for Version 2 Paterno Remarks F360281 F360281 ed
16. overcurrent protection Circuit x 1 2 Video circuit 1 Color interface circuit Color setting 2 Switch S101 Video input R o Red video buffer Q101 G E Color interface NM I p ls To video output Cio Green video buffer Q131 amplifier circuit B O Blue video buffer Q161 Contrast con ABL trol circuit 0140 0141 VR141 Blanking O Blanking pulse E 5 V output Brightness control 0142 VR142 The input video signals R G B are combined by 101 into m g IBM colors Apple colors standard colors set up by the color setting switch 5101 and sent to the respec tive video buffers Q101 0131 0161 The output voltage level of the color interface IC101 UM a gt s e M M A SE m a O gt as 5 ES ULU UU U StS a Ee eee P eee ie webs fares ice Ave io 4 be controlled by the contrast circuit of 0140 0141 VR141 which permits screen brightness control The contrast circuit also has ABL circuit attachment which _ Prevents the CRT beam current from increasing abnormally when trouble occurs The blanking circuit 0143 and brightness control VR14
17. side distortion _ vertical circuit DY circuit E horizontal circuit peripheral circuit video circuit check line horizontal output circuit check horizontal circuit CRT circuit check 12 V 5 V line video circuit vertical circuit AFC horizontal oscillator circuit vertical circuit color interface circuit video circuit video circuit CRT peripheral circuit Side PCC circuit 19 e t m o raster High voltage circuit CRT cir cuit fault High voltage at anode Yes CRT heater voltage normal ves FBT CRT electrode voltages normal Vr aree YES CRT cathode voltage normal YES _ Check CRT No raster 2 Troubles in the FBT peripheral circuit Collector pulse of horizontal output appeared YES lt Check FBT NO Check heater circuit c a Check each electrode voltage NO 13 V D706 cathode 76 V 0710 cathode 200 0705 cathode NO Check video circuit 1 Red video circuit Check horizontal output circuit and high voltage restriction circuit Peripheral parts of 0701 0702 peripheral parts of H DY _ R730 R738 R737 20701 R736 C734 IC701 CRT 61 0 V G2 500 900 64 5 6
18. voltage i IS by the T and discharge of C603 During a vertical flyback period 03 is charged from 3 of the IC701 by the switching transistor inside the IC During a scanning period it is discharged by the resistor R602 and the vertical linearlity control VS701 4 connected to pin of the IC As a result the potential slowly decreases When this potential reaches the same level as that applied to pin 2 of the IC the charging starts again by the switching transistor in the IC corresponding to the flyback period Meanwhile the output voltage applied to the deflection yoke is amplified by the amplifier circuit inside the IC and applied to the vertical output transistor Q601 8592 from pin of These transistors drive the verugal DY IB Ns Scanning period Flyback period m EA 1 4 Horizontal deflection circuit SYNC Sync position dc102 Sync separator Sync selector switch S101 bit 5 SYNC PULSE WIDTH REGULATOR JIC103 AFC circuit Oscillation High voltage limit control Horizontal predrive Horizontal drive 4701 Q702 Horizontal DY The triangular voltage generated e the flyback pulses iS applied to pin of the 701 and the sync signal is applied directly to the AFC circuit from the sync separator circuit inside the IC The AFC circuit c
19. 035 Volume resistor R864 VR865 200 ohm 1 2 Metal F090061 Capacitor C140 16 V Electrolytic F190317F Capacitor C864 2 22 pF 16 V Electrolytic F190318F Capacitor C734 33 pF 16 V Electrolytic F190319 _ Capacitor C926 111 47 pF 16V Electrolytic F190320F Capacitor _ C144 C746 C701 100 pF 16 V Electrolytic F190321F Capacitor C613 220 F 16 V Electrolytic F190322F Capacitor C614 330 2 16V Electrolytic F190323 Capacitor C716 C611 0 470 pF 16 V Electrolytic F190342F Capacitor C149 1000 16 Electrolytic F190325F _ Capacitor C1427 1 47 pF 25 V Electrolytic F190333F Capacitor C141 C702 C601 B 50V Electrolytic F190355F Capacitor 305 C306 C707 1 F 50 V Electrolytic F190355F Capacitor C920 22 pF 50 V Electrolytic F190356 _ Capacitor C737 83 F 50 V Electrolytic F190357F Capacitor C607 447 50V Electrolytic F190358F Capacitor C921 22 yF 50 V Electrolytic F190360F _ Capacitor C606 33yF 50V Electrolytic F190361F Capacitor C301 C302 100 pF 50 V Electrolytic 0248724F Capacitor C305 C309 10000 F 50V Electrolytic 0244171F Capacitor C608 22d 100 Electrolytic F190384F Capacitor C609 C740 100 pF _ 100 V Electrolytic F190388F Capacitor C854 C855 C856 4 7 uF 160V Electrolytic 0253455F Capacitor C867 10 160 V Electrolytic F190404F Capacitor
20. 100007 01000053 01000053 01000053 01000055 01000057 01000057 010000576 01000061 01000063 01000065 01000065 01000065 01000069G 01000071G 01000072 01000072G 01000073 01000073 01000077 01000080 01000081F 01000081 01000081 01000081 01000082 01000082G 010000836 01000085 01000073 010000736 01000077 s 2 oa Wo ais 31 49 27 28 29 30 33 34 eue 36 37 38 39 40 41 42 43 44 45 46 47 48 50 51 52 53 54 55 56 57 58 59 Bi 62 63 64 65 66 67 68 Como 26 Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor _ Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor R145 R146 R711 8603 R929 _ 8301 _ R701 R308 R737 R607 602 R935 8706 R115 R725
21. 2 connected between the color i in terface and video buffers are used for blanking and black level control 2 Video amplifier circuits _ RED OUTPUT AMP m a851 9854 7 From video G GREEN OUTPUT d buffer circuit 0852 0855 a BLUE OUTPUT AMP 0853 0856 control VR801 VR811 VR821 cathode The R G B Video signals composed bos the color circuit pass maah the video buffer circuits and are entered i the respsctive R G B video output amplifiers where they _ amplified to about 50 Vp p for output to the CRT cathode The background B K G control resister VR801 red VR811 green VR821 blue which serve to fix the CRT cutoff level are connected between the video amplifiers and the CRT cathode 1 3 Vertical deflection circuit SYNC PULSE T An WIDTH REGULATOR SE To blanking circuit 103 Sync pam Sync com position separator 102 2 V blanking shaping k Eo Amglification m V LIN 7772 V 12 c603 3 Sync selector switch 5101 12V Vertical output Q601 Q602 2 Vertical DY oos 905 Tw Aaa eos I mm i c 4 rA 5 1 svs e ate W nh uro yi quem mmi The s sawtooth
22. 4 F040201 0110175 F040023 F040022 2040033 0110211 01102446 01102446 01102576 01102676 2040042 2040041 LIST for Version 1 for Version 2 Component Symbol no i Ratings Fence Resistor R724 6 6 wound F070011 Resistor R901 3 9 8W Wire wound 0141073 Resistor R901 s 15 ohm 8 W Wire wound 070051 Resistor _ R148 R621 100hm 1 4 W Fusible 0119514 Resistor 634 8718 740 1 ohm 1 4 W Fusible Resistor R719 R755 2 2 ohm 1 4 Fusible 0119512 0119505 Volume resistor VR742 500 ohm 1 2 W Wire wound 0162626 Volume resistor VR142 0 500 ohm 112 W Carbon film F090121 Volume resistor VR141 1k ohm 1 2 W film 090123 Volume resistor VR140 5k ohm 0 1 W Carbon film FO90102 Volume resistor VR920_ 50k ohm 0 1 Carbon film F090103 Volume resistor VS701 6 VR 0 1W Carbon film F090111 Volume resistor VR640 100ohm 1 2 W Metal F090151 Volume resistor VR628 2 1 1 2W Metal FO90092 Volume resistor VR301 500ohm 1 2 Metal F090152 Volume resistor VR301 0 20k B 1 2 W Metal F090153 Volume resistor VR801 50kohm 12W Metal F090033 Volume resistor VR811 50k ohm 1 2 W Metal F090034 Volume resistor VR821 _ ohm 1 2 W Metal F090
23. 54 8156 R158 8108 R727 R302 _ 8106 R138 8142 _ R143 R144 R153 R137 R167 753 8147 R605 704 8102 R132 R162 R192 _ R101 8131 161 8604 R120 R715 R622 R703 R723 R731 R721 R884 R886 R885 R173 R175 177 R133 R163 8173 R873 R874 R801 R606 R149 R302 R309 R104 R171 R105 8185 8155 8157 8168 8619 8625 8707 R305 8736 R753 R308 R303 R306 R191 8111 8112 0 R119 R121 123 R708 R608 R754 R931 R612 3 9 ohm 18 ohm _ 22 ohm 47 ohm 47 ohm 56 ohm 68 ohm 100 ohm 100 ohm 100 ohm 100 ohm 2100 ohm 180 ohm 270 _ 270 ohm 270 _ 270 ohm 270 ohm 270 ohm 270 ohm 390 ohm 390 ohm 470 ohm 470 ohm 470 ohm 680 ohm 820 ohm 1k ohm 1ikohm _ 1k ohm 1k ohm 1 5k ohm 1 8 ohm 2k ohm _ 2k ohm 2 2k ohm 2 2k ohm 2 2k ohm 2 2k ohm 3 3k ohm 3 3k ohm 2 4 3k ohm 4 7k ohm 4 7 ohm 4 7k ohm 4 7k ohm 5 1k ohm _5 1 ohm 5 6k ohm 6 8k ohm 8 2k ohm 2 PARTS LIST 1 8 W 1 8 W 1 8 W M8 W 1 8 w M8W 1 8 W 1 8 w 118 w 1 8 W 1 8 W 1 8 w 1I8 W W 118 W 1 8 w M8 W
24. C724 C744 100 F 160 Electrolytic F190281F Capacitor C942 100 F 160 V Electrolytic F190408F Capacitor C910 470 pF 200 V Electrolytic F190551 Capacitor C910 220 pF 400 V Electrolytic F190561 Capacitor C801 C802 C803 4 7 aF 250 Electrolytic F190412F Capacitor C714 0 _ 10 250V Electrolytic F190413F 860 E 150pF 50V Ceramic 0244229F tu e DD es 115 116 117 118 119 120 121 12 123 124 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 146 147 148 149 150 125 422126 144 145 Component Capacitor Capacitor Capacitor Capacitor _ Capacitor Capacitor Capacitor pacitor Capacitor _ Capacitor Capacitor Capacitor Capacitor Capacitor Ca pacitor Capacitor Capacitor Capacitor Capacitor _ Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor X Capacitor Capacitor Ca pacitor Capacitor Capacitor Diode Diode Diode Symbol C861 I C862 C704 C143 C151 C153 C154 C122 C602 C152 C155 C868
25. H HOLD Af the screen image fide horizontal stripes or if the image moves left or right adjust the H HOLD E control for a clear stable Images See illustration 4 6 V HOLD _ the screen image moves or overlaps vertically adjust the HOLD control for stable image See illustration 4 7 FOCUS M Adjust the focus for the sharpest image See illustration 6 28 V LIN _ Adjust the V LIN control 50 the height of characters i IS even over the whole screen See illustration 7 9 CONTRAST Turning the CONTRAST control clockwise increases the contrast turning it counterclockwise decreases the contrast 10 BRIGHT Turning the BRIGHT control clockwise makes ihe screen brighter turning it counterclockwise makes it darker x 11 SUB CONTRAST TO adjust the subcontrast soy a screen of characters then turn the BRIGHT control to the click _ Stop position and the CONTRAST control fully clockwise Now adjust the SUB CONTRAST control VR140 to the position just before the characters Pecans saturated 12 CENTER _ adjust horizontal centering turn the BRIGHT and the CONTRAST controls fully clockwise with __ nothing displayed on the screen adjust the H CENTER VR 8742 50 the raster is centered on the screen TE 13 SIDE PCC Depending computer models with which display monitors are connected pincushion or barrel distortion appea
26. Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon for Version 1 for Version 2 F380201 380201 F380201 F380201 F380201 F380201 F380651 F380652 2332251 2330251 F360281 2330551 2331912 530061 2410551 410581 F380661 F380751 F380681 F410541 F380427 2332221 F380378 2331845 F380616 2334122 2330634 F380575 F380681 380741 2410791 2361881 410694 2364181 F410697 F410673 F410592 F410674 2321992 2320596 2320596 F380201 F380201 F380201 F380201 F380201 F380201G F380201G F380631G 1187 188 189 190 191 21192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 221207 1208 209 210 211 212 213 214 215 216 Transistor Transistor Transistor Transistor Transistor _ Transistor Transistor Transistor Transistor Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Transformer Transformer Transformer Transformer _ Switch Switch Switch Connector Thermister Thermister Fuse Fuse Fuse 0143 0854 0855 0856 0142 0851 0852 0853 0702 Q601 0602 0920 0141 0702 L701 1708
27. ZON REGULATOR H DEFLECTION COIL TO Ve AREO CIRCUIT BLANKING H FREQ HIGH OUTPUT MES VOLTAGE PROTECTION SYNC IN UAE 1 v DEFLECTION cot V OUTPUT 0601 0602 V SYNC IN DIAGRAM Version ll PN LEE sin Mer P ge 2 4 AX vii Shae ee ees v e HEUTE AES 2 av 9 I C365 res 3 x o L 9 66 58 54 1 Operation Principles t oc 4 4 Voltage regulator circuit Eom Primary rec P Voltage re ulation Output transformer tification 0901 sor T901 FER Voltage detection Secondary Output rectification 115V D940 The voltage regulator circuit of this unit switching regulator system In other words input AC supply voltage is rectified to unfiltered DC voltage by the primary rectifier circuit This voltage is converted to high frequency pulses by the voltage regulator IC901 which mE simultaneously performs pulse width control for regulation of a secondary rectification output The DC output with no ripple 115V is obtained by the secondary rectifier D940 following the passage through the output transformer T901 This e has built in
28. counter clockwise b Vertical size 1 Turn V SIZE counter clockwise 3 Characters missing at top Turn V HOLD clockwise wasaqa s ue m i 9 w e Setting the signal color display 2 Setting the sync signal input mode fifth color mode switch The sync signal of nearly any personal computer can be input by turning off the fifth DIP switch But the sync signal of a few computers can be input only with this Switch on The following table SAONE the switch setting for a number of sync signals yon ME Condition Signal type sync Positive TTL level sync Negative TTL level H V H Negative TTL level V sync Positive TTL level H H V H composite positive sync Positive TTL level sync Positive TTL level AT amp T sync Negative TTL level V sync Negative TTL level IBM JAPANESE V sync composite ae Turning of the TEXT switch on the front of the unit display to single color mode _ Super Vision monitor can now be used as a monochrome display monitor There are four basic monochrome modes green amber reversed white and white on blue The monochrome mode 5 Set oy N the third and fourth DIP switches 5 Color Reversed white White on blue Uppermost raster does not appear Or i
29. ile the flows in this diode a periodic current is allowed t to flow in the horizontal coil X Q702 conduction Resonance Damper diode I 1 630 640 E A B J 5 period period conduction period FOLE approximate 1kVp p pulse voltage generated by resonance of the capacitors and coil is _ boosted by T703 FBT and supplied to each CRT electrode the vertical Circuit video Circuit etc 4 High limit control circuit I a high voltage applied to CRT from T703 FBT rises abnormally some reason and exceeds approximately 28 kV the high voltage detector voltage output from pin of 703 FBT is applied to pin 6 of C701 NI stops the output of the horizontal Pieve inside the 701 zB uoc Ts 2 mouet eg quy 22 9 9 rr m Normal input voltage Abnormal hue 2 Repair Chart u Turn on power and connect the input signals No raster Faulty input voltage Only a horizontal line Only a vertical line The raster appears No picture The picture appears Horizontal amplitude too small Abnormal vertical amplitude Dark screen No horizontal syn chronization No vertical synchroniza tion Different luminance between horizontal and vertical dots of a character Bad focus Bad
30. ite signal Set the BRIGHT control at the click stop position the CONTRAST control to Min then E just the cutoff adjustment controls of 1 E 7 so that the lowest luminescent white balance is 9300 kelvin Set the BRIGHT control at the click stop position the CONTRAST control to Max than ad _ just the B dirve adjustment control 50 25 the highest luminescent white balance i is 9300 kelvin Set the BRIGHT control at the click stop position the CONTRAST to Max her whether the lowest luminescent white is balanced If not repeat the steps from 1 5 2 RASTER ALIGNMENT 2A RASTER POSITION ADJUSTMENT 2 2 27 Input a white raster signal to the screen E Set the raster size by alternately adjusting the HORIZONTAL and VERTICAL SIZE controls L702 and VS701 and VERTICAL LINEARITY controls VS701 Center the raster by alternately adjusting the HORIZONTAL POSITION and VERTICAL POSI 5701 and VRG28 gt 4 Z A me lt eo 1 4 g T nil B 5 Ho em og CD ore _ DISASSEMBLY PROCEDURE Fig 2 1 oh d The following pictures show the basis chassis Individual products may be different in details 1 REMOVING THE BACK COVER 1 Unplug the unit from the wall outlet
31. ntrol to its center position 1 B 3 Set the H HOLD control to the center of the range of picture stability _ 1 8 4 Adjust VCC control VR920 to there i 1 115 1 between B and chassis ground _ 1 C HORIZONTAL AND VERTICAL ADJUSTMENT V quo Adjust L702 and VS701 1H HOLD and VS701 POSI for the best raster alignment 1 C 2 Adjust VS701 V HOLD VS701 1V LIN sue and VR628 V J for the best vertical raster alignment 1 0 FOCUS ADJUSTMENT Display a full screen of characters MN Adjust the FOCUS control ox the sharpest detail at de center ei he screen 1 E RGB CUTOFF WHITE BALANCE E 4 1 6 Le PEB 1 E 9 1 10 Men EA E2 Input black signal to the monitor Set the RGB cutoff adjustment controls VR801 8 11 821 at 3 9 clock Set the G B drive controls VR864 865 to their center positions Adjust the SCREEN control to fully counterglockwise Set the BRIGHT control at the clik stop position CONTRAST control to Min En turn as on the service switch 5601 Turn the screen adjustment control clockwise uncis a raster line appears _Gradually turn the cutoff adjustment control counterclockwise except the one of the col r that first appeared on the screen Aaus them SO that the raster lines of the three colors are the same intensity Turn off the service switch 5601 then input a wh
32. ock hazard which must be corrected be tore returning the monitor to the owner Ifa reliable leakage current tester is not available this alter _ nate method of measurement should be used Using two clip leads connect 1500 ohms 10 watts resistor paralleled by a 0 15MF capacitor in series with a known earth ground such as a water pipe conduit and the metal part to be checked Use a with 1000 ohms per volt or higher sensitivity to meas re the AC voltage drop across the resistor Any reading of 0 35 volt RMS or more is excessive and indicates a poten tial shock hazard This must be corrected before returning the monitor to the owner VOLT 1500 OHMS TEST PRORE KNOWN TO EXPOSED EARTH GROUND METAL PARTS IMPORTANT NOTICE FOR SERVICE PERSONNEL BEFORE SERVICING PLEASE READ BEFORE ATTEMPTING SE RVICE 1 While the monitor is in operation do not attempt to connect or disconnect any wires 222 sure zths power cord before replacing Y the E Be When the power not attempt to short any portion of t iex circuit This arand may Cause damage t to the transistors in the monitor 4 When servicing H V area be certain that the anode i is discharged to ground LN before removing the anode 57 5 Caution must be exercised when servicing this monitor The
33. ompares the phase between these signals and outputs S 4 from 2 of the IC the current proportional to the phase difference This current is sent from i3 of the IC via the resistor R702 to the horizontal circuit for frequency control a Oscillator Circuit A triangular oscillating venis IS generated by t the capacitors C703 C732 C703 and C732 are charged via the resistors R703 R704 and the HOLD control VS701 and discharged by the internal circuit of the IC From this triangular wave is created a rectangular wave with a duty ratio of 1 to 2 Wiich ds output from the pin 9 of the IC 17 deos 9 2 eses A OMS A uy me V PE x 2 3 drive horizontal ouput circuit 400 must flow the base of the horizontal duiput transistor I 0702 the oscillating voltage is amlified by the drive circuit composed of Q701 and T701 Consequently a linearly increasing current flows the coil When Q702 is non conducting the current previously flowing in Q702 comes to flow in 7 C718 C719 for resonance with these capacitors and the coil At half of the resonance cycle the current direction i iS the current now WONG through the damper diode inside Q702 By making 0702 conducting again wh
34. regulator has no current limiting and even momentary short of an output voltage could as cause destruction of the pass transistors This model 12 inch cola display monitor need for a personal computer terminal Its input is n 7703918 signals The input terminal is an 8 pin DIN jack Specifications CRT 12 inch type with 646 8 mm wa ee Facing Non glare face pista l B Facing Glare face plate 630 6400 J 22 Screen 630 640 B22 Short persistence Signal input Separate R G B I V s 4 e 2 2 6 Positive e Sync Positive or negative Power Supply 0 Local commercial power supply Wattage _Cabinet se Plastic AE Dimensions 322 W x 309 372 D mm Weight 12kg 24 8 kHz Horizontal L 54 3 Hz Vertical OPERATION 21 Plug the display and the computer into AC outlets 2 Set the color mode switch on the rear panel 3 Connect the signal input terminal on rear panel to the computer using the optional cable 4 Turn on display monitor and computer b The green power indicator just above the power switch r then the CRT Screen brightens There may be characters displayed After the monitor warms up set brightness and contrast if necessary Position of the image image area and focus are prese
35. rs on the right and left edge portions of their screen areas as shown in Fig 1 The distortion on the right and left screen portions be minimized by turning the SIDE PCC potentiometer clockwise or counter clockwise for distortion I correction results Problems a _ Width of the image is not correct Height of the image is x not correct _ Position of the image is not correct The image has a diagonal stripes The image moves ver tically flops The image is blured Character heights on the screen not uniform There is no image The screen is dark 3 v Adjustment Narrow POSITION 0 Right Left V POSITION Down TOM CONTRAST Bright Dark BRIGHT Bright Dark _ ALIGNMENT PROCEDURE 21 GENERALALIGNMENT Cu e PRELIMINARY ADJUSTMENT ES D 1 0 2 observe all safety precautions shown 2 In this manual 2 Connect AC power and make sure that it is within the line voltage gs 2 V _1 3 Allow the monitor to warm up for at least 30 minutes 3 A 4 Roughly adjust the FOCUS control ed A 5 Connect a correctly adjusted color Fg ADJUSTMENT 1 1 Set the BRIGHT control fully gt 182 Set the SCREEN co
36. stor Transistor Transistor Diode ZD103 Zener diode 0161 0140 0171 1 0132 0133 D134 0135 0136 0140 0141 D161 D162 D163 0164 0165 0166 D191 0192 0601 D602 D702 0703 0718 0719 D115 0603 D301 D302 0707 0710 D705 0706 0714 0715 0864 0855 0856 0721 0851 0852 0853 0120 0720 D724 D940 D922 0722 D723 0920 D921 0901 70702 20140 20302 20701 20301 20601 20602 20101 20102 _ 20920 20921 20941 101 41 102 IC103 4C701 IC301 1C301 IC901 1 302 0701 0101 0131 0301 5 LIST Ratings US1040 1051040 US1040 51040 US1040 US1040 US1040 US1040 US1040 61040 051040 US1040 US1040 US1090 RU1 RH1S VO6C 9 15582 SEL1324G EU02 RU2AM GFE10 10 _ 15618 HZ4B3 HZ6LB2 _ HZ2B1 HZ 128 2 HZ 360 RD5 1EB1 HZ 7 HZ 15 1 28 3 6 BIC R2M MB7124 or 7123 HIE MD74LS86P MB74LS123M G 11423 MB74LS132M G 74LS73 STK 7308A 741574 6 25 2271 2SC458 CID 28C458 DH us E Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon
37. t at the factory so you don t to adjust these Depending your computer image width height and position may differ from the stan such reset as necessary controls are on the rear panel SIGNAL INPUT CONNECTORS Signals are input DIN connector Each signal is assigned as folowing 1 assignment REAR VIEW ee s Ie lt 4 2 wo o o er gt A d Setting the color mode 2 Pin assignment Reserved for signal Red video signal Green video signal Blue video signal Intensity signal Signal ground Horizontal or composite sync signals Vertical sync signal HOW COLOR MODE The color mode switch five switch DIP unit is on i the rear panel Set it as follows according to your computer Uc 9 ies B Color mode switch E unt AT amp T OLIVETTI Note ADDENDUM for AT amp T PC6300 and 630 640 E U A B S are factory set to use with IBM PC XT AT or You need the following adjustment in order to obtain maximum performance i in when vou use with AT amp T eco PC6300 PLUS computer and compatibles Turn H HOLD counter clockwise 1 Curl at top Turn H POSI clockwise 2 Small screen size _ a Horizontal size Turn H SIZE
38. ts disappearing position varies depending on the brightness Note In reversed white or white on blue mode the following phenomena may appear as described on the right These are quite normal for this One or both ends are brighter than other areas mode Lowest two or three rasters run off the screen _ INDICATORS AND CONTROLS POWER INDICATOR GREEN LED _ POWER SWITCH PUSH ON PUSH OFF N TEXT SWITCH BRIGHTNESS CONTRAST _ _ COLOR MODE SWITCH _ T E VERTICAL SIZE e 0 E NU _ HORIZONTAL SIZE NANA OA VERTICAL POSITION gt VERTICAL LINEARITY VERTICAL SYNC HORIZONTAL POSITION HORIZONTAL SYNC VIDEO SIGNAL NET m INPUT TERMINAL gt 4 ss SEEPS FONT TT T 1 H SIZE ADJUSTING THE DISPLAY If the horizontal size of the screen image 5 too short Or too ong adjust the H SIZE control for _ the correct size See illustration Ls 2 V SIZE f the vertical size of the Screen image 5 too short too ong adjust the V SIZE control the correct size See illustration 2 If the screen image shifts s horizontally adjust the H POSI control for a correct t image Mates tion 3 24 E the screen image shifts vertically adjust the V POSI control for a correct image See llustration 5
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