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SERVICE MANUAL - Pdfstream.manualsonline.com

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1. gt raea AC SIS pow 2 T 5 IR B sa 82 m u 54 8 20910 100 418 EM 100 80 1 ee m h RC94 E a ayRC42 100 p 0005 gt zy 5 n Jaco HP Q 8g gt 2 SC24 3 5 8 3 100 VM OUTPUT analo
2. 1 A 1 1 1 CP11 CP12 CP21 1 50 55 470 10 0 1 50 0 10A ca SMG 1 G lt 7 to DEF 2112 DP07 LP22 z217 A 007 RU4Z 007 EYELET 100H i gt Ex Ex m gt A EYELET 07 pom 2144 RP44 1 5000 47552560 EYELET 4 4700P AC250V PROTECTOR Ck cpag 4 8 2 1000 10 1 CK F 1 Z22200 16 1000 16 ZZ 22 1000 10 Zu YXF 7 7 DP37 0209 e Pa 512 384 2518 0 04 1 2503 TwG 11F 7206 2 20804 1 t 1 hi 1 1 EA 5A EYELET oo zs PROTECTOR 6802590 25 22 Ho SWt5V m 220 16 5 5 4 4 1 PE Sut 2205 20 0 200 22 680 200 390K 2 GND EYELET T KMH RD1 2J So SWt35V M 2216
3. m 0026 B 25 2412 5 5 5 7000 P Y M 208 m ES 2008 R001 0 MICRO GND SIGNAL GND 133 5 c 133HS E Iti RE EBENE BER B EE Ee BE SSe 8181 EIB ies Y 111 77 Y 8 H j 38 338 5 voa d HE x Tm ale B B B 8 s 007 25 gt S 8 2 8001 2908 ip d or 2 p Sis 97 007 ekz o su o alele 8 x zl ES E 5 5 B Jo S 5888 2 33 gs 8 S onl gt G S 8 3 Voal X88 _ 238 gt z 2 tsk 2 gt lt 5 5 x uon a k 207 TEOD 8605 505 m i HE ES HE m 40
4. TERMINAL PWB e oo o in PDF2 8 00000 5 0060 sd ANTENNA TERMINAL BOARD CONVERGENCE PWB NOTE pene i THIS DRAWING APPLIES connector anode lead is removed or inserted NOTE Anode lead should be separated from others m wires 10mm y Zo Anode lead must not be twisted during the il operation of wiring dress BACK SIDE PV154 923 03506 5 7 ZP26 28 EXPLODED VIEWS 56 65 Wiring Diagram Front PV154 923 03506 n c 1 e m a lt VE I ANS PS3 eer a 7 2 m co e SENSOR P WB PFS PFS PFT EX PET from TERMINAL PWB i from SIGNAL PWB 5y Z N PFS 5 PFC PFT CONTROL CONTROL P W B SUB PWB LEADCLAMPER WSUBPWB i om SIGNAL PE s o E B 67 from SIGNAL PWB N ONS 0007 S gt 7 N I D fonrocus pack SCREEN R from FOCUS PACK VM PB A
5. D to DEFLECTION PWB gt 5 9 gt x x aa al i gt zi D qn gt gt gt meum 2 2 2 5 G mom GO c o o oos gj GQ Z Q Q Q G Q Q oZ b m gt G Z Z Z Z Z i x Z 3 690999929999099H9999999 1 1 owes 7 411117147 IK05 sTKs92 110 CONV 1 04 sTK392 110 Y EJ GND IL C ri Bey mE 9 dia 479 BKOS 2 7K Y Y 9 27 Y i T 5 5 usss qu Tax 15 ge lea Le ski 38 85 alerts x x er TT ES PE AES aj 1996 yes STERS piyi 555 TED of of 9k KKSS AN z m Si x nk23 5VREG MUTE DE DK16 27 RD36EB3 PST9142 er G 2 RK24 1 5K 150P PK43 220 E o m 4 too 5 I KAO DK38 155133 Kki4 KKi2 uu 1 0 7 520716 4 E e Fils xs MYL KES I 150 lp ooo 10k RK64 PRAA 10K PK46 W 0K19 gt 1817 E gt 7 27K 4 34 5 150P 1502 d ve j lt 50
6. N003 a CPTPWB G gt ANODE B TERMINAL P W B ANTENNA TERMINAL BOARD Refer to the figure below about the assembly if FOCUS PACK leads 9 e SCREEN SS 55253 nu FOCUS RGB CREENRGB MAG FERRITE CORE 133 E001 N an Ns S S SK BINDER 2 P 3763752 make a loop CATCH HOLDER BACK VIEW MARK SHOULD BE APPLY A LEAD CLAMP NOOS LEAD CLAMP PARTS No IS 3813121 MARK SHOULD BE APPLY A LEAD CLAMP NO11 LEAD CLAM P PARTS No IS 3875441 OmU POKP y CONVERGENCE PWB BACK S THIS DRAWING APPLIES TO R50V26 ZP45 CHASS ZP26 28 EXPLODED VIEWS 60 Wiring Diagram Back Refer to the figure below about the assembly if FOCUS PACK leads IGS 8 FOCUS PR make LEAD CLAMPER double loop LEAD CLAMPER MAG FERRITE CORE 133 PDF2PSF FOCUS R GB PAQ1 PLPQD2 PR PDC1 O ail PQS2 PQD1 PCBPOG 5 make a loop MAG FERRITE CORE 133 PCR PCB PCG MRMB MG PQD1 PQS1 P
7. To Exit Quit Use the UP DOWN arrow button to cycle through your channel list and review the settings Each press of Up Down arrows will display the next eight channels Press QUIT to exit ZP26 28 MENUS USER MENUS CLOCK SET Use the UP DOWN arrow to choose Clock Set Use the RIGHT arrow button to choose first the time option and use the UP DOWN arrow buttons to adjust time options Press the RIGHT arrow button and then use the UP DOWN arrow buttons to adjust month date year options Press QUIT to save and exit Use the RIGHT arrow button to access the Picture formats Menu Choose and set the options based on your equipment s signal requirements for high definition or standard NTSC sources Aspect Style Normal Wide Zoom or Panorama Vertical Position sets the image s vertical position on screen Comp Color Type HDTV or SDTV DVD Video Display 10801 or 540p Press SELECT to set and confirm your settings Press QUIT to save and exit C RD am TOSETTIME CD SETUP Trilingual Menus Note 10801 signal source settings are fixed while other signal source formats are adjustable 10801 10801 TV converts 720p to 540p 480p Signal Scan Channel Add Del Channel Review Clock Set 12 00 Am HD Focus May 02 2002 Picture Formats Menu To Menu Bar To Exit Quit Use the UP DOWN arrow to choose HD Focus Press t
8. 100 caes 28 1037 2 10 50 R556 aus n5 2 T Or Qu mu R557 XXX a m SW 5V ANN u rm SW 3 9 888 BSE gs Bes o 587 PST9127NA aoa OQ m ox o o 0501 ANT H easceatex A501 q m w Br hze 95 Y ENS N se RECS R502 Mx 54 400 TT dk 8 ms C308 F1 0 H eS je a C309 BO 1 100 T 85 R PW IR5C7 100 C310 1 PV ERRMUTE 127 C311 10 50 s 0501 C312 10 50 mig C313 1 xm MAIN VIDEO CHROMA VO A30FT C314 1 uPD640826F 3BA 8x 8 C315F1 0 88 q 5 C316 BO 4 3D Y C 6317 B0 1 SEPARATION s 7 SWT5V 8 m CH22P 1553 100 9 a i C338 B85 88 8 s b 28 m Bs 5 ox C57 c 5 5 2 8 4 8 T Pus 19 ET gr Sw 9v L554 gt ga 2 eer 0316 5 8 5 25 241 8 CHROMA TILT 25 2412 Y SA 5 7 CORRECTION J ma TILT ON OFF 5 F Lr S fis 7 7 m SBY 9V m E qu 85 HE REY 23 1037 gt tantra meh n BE Bes Ge m 8597 wATN H 5 100 5
9. Captions Background Solid O Shaded Menu To Menu Bar To Exit Quit VIDEO MENU GEI CD 6 SETUP SPECIAL VIDEO AUDIO Contrast 5 1 75 Brightness gt 50 in rn gt gt Tint lt gt Sharpness lt EN 1 gt 5096 Reset Advanced gt Settings Menu To Menu Bar To Exit Quit PICTURE SETTINGS Press MENU and the RIGHT LEFT arrow button to show the Video Menu Use the UP DOWN arrow to choose one of the following options Press the RIGHT LEFT arrow button to activate that option For these items only the adjustment bar will drop to the bottom of the screen continue with normal operation e Contrast Changes the amount of difference be tween black levels and white levels in your pic ture e Brightness Increases or decreases the amount of white in your picture e Color Adjust levels of all colors e Tint Adjust the relative amounts of the color red and green in your picture e Sharpness Raise or lower the definition of the pic ture The lower the level the softer the image will appear e Reset To return setting to original levels ZP26 28 MENUS USER MENUS RESET Use the UP DOWN arrow to choose Reset Reset restores the levels to their original settings Press SELECT to confirm your choice ADVANCED SETTINGS Use the UP DOWN arrow to choose Advanced Settings Press the RIGHT arrow button to activate the Advanced Settings me
10. i 10 xx POWER ET g x 1 88 4 PROTECT2 SBY 3 4 20 1000 16 C930 E 58 1750 59 SW 2 5V 1 580 500 ca L945 SBYtsv 470 16 GND Eg 1240 2231 una 0 20A T 1 1 e an gt SBY45V C935 1 TET EK04 1000 10 5 7 LI T 58 9971 Li 0 1 C834 2 zT g GND aceso 1 150 500 miu 280458 2130 2290 46 100208 SBY 9v 5 SMG C951 ii EYELET 1000 16 to SIGNAL P W B SMG R973 PROTECT 4 4 iK ON 0923 By By by 4SR139 400 ge 2 1 OFF 0920 T R944 y 250458 27 8947 Los e 180 PPY CH PEI sz POWER I AG BASE 155 ON 5 b 9 C948 0 22 50 iol 0924 ga 1903 ms 254 8 2 2103 1 249 on 55 15 4 7 2104 2101 3 EYELET 1 ts z210 EYELET isso 0825 LA 158138 400 2209 EYELET 1 1 um oir 0914 RELAY 250458 0926 8954 DRIVE 188133 220 ieee Tepee ack gt T i 100K nD1 2J 58 zz 6940 nase 88 7 47 35 47K R949 R955 AK ENG 10K 0807 158139 400 K 8 asia i QSABT3 R957 R958 250458 9916 SN 15 0 22K 100 SN B C 280458 9917 3 S co 550458 m PIN HEADER R901
11. 0 NL _ ue lt s Ag Sos FOCUS BRE brown PL Terminal base Red FOCUS R SCREEN fomFOCUSPACK i PWB Terminal base white FOCUS B POWER SUPPLY N ES NU SCREEN a ver D _ scree R Woofer R HOLDER CPT PWB SHIELD from SIGNAL PWB 8005 4005 n 055 5 PURSE LOCK 08 PURSE LOCK 08 PURSE LOCK 08 THIS DRAWING APPLIES TO R50V26 amp R60V26 ZP15 CHASS FRONT SIDE PV154 923 03506 5 5 7 26 28 EXPLODED VIEWS 56 Wiring Diagram Back Refer to the figure below about the assembly if FOCUS PACK leads SCREEN PSF FOCUS T ES PRmake LEAD CLAMPER from SENSOR P W B double loop 008 LEAD CLAMPER MAG FERRITE CORE 133 Eu PDC1 make a loop REINES 1 008 E001 PDS rocis Ra TK NN PAQIPL Qr PAQLPLPQD2 CO POS PDCI ra 052 LPQSZPQD PCBPCG f make a 100 PR 007 PCRPCB PCG a MRE NG PO 2 ANODE B to CONTROL to Speaker PR PWB mn m MAG FERRITE CORE 133
12. tte DJ03 35 1401 155133 1 amp ol 2026 FB 0 4 k me eps zai TA8200AH T rR WOlOUT Q os 5 0 04 EDS an oo 9 2 2 3 3 GND 2 4 S 4 4 5p on 410 FR Tw oUT PAGI a7 1 CJ12 og se FO oo en 0 1 T SW 28v GND GND 001 0 002 04 K009 0 o 011 012 04 013 04 77 Z CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 6 10 NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC ZP26 28 SHEET 10 REPLACE ONLY WITH PART NUMBERS SPECIFIED CHANNEL 5 AND NSTC COLOR BARS SRS Circuit RA7 E 10 50 CE M T RA7B 1K 5 CA25 10 50 2 CE M cago Paoa 225090 10250 10K CE M CASS _ 3000 2 vee CA39 10 Q ms vous 9 8 9 TONE Lb 9 3 3 1402 NJM2198M 1 eszout_a 8 rone LIN G lt TONE La G 42 cva 43 sce 43 ono o 8 i 5 Lae TAOS 4700P RAO3 10K fen Wo 010025 CA37 300 SRS LOGIC MODE MODE 1 MODE2 L
13. SK BINDER P 3763752 make a loop CATCH HOLDER URSE LOCK BACK VIEW d FXUSG B SN Z LX ZCAT3035 1330 Focus rs AA focus V Ug SCREENIB 2 SCREEN i EAS 2 pd 1 make a loop CPT PWB B 7 Hold Anode B 052 MARK SHOULD BE APPLY A LEAD CLAMP NO08 POWER SUPPLY LEAD CLAMP PARTS No IS 3813121 PWB W MARK SHOULD BE APPLY ALEAD CLAMP NO11 LEAD CLAMP PARTS No IS 3875441 make double loops r FLECTION SIGNAL PW B 2 7 PQS2 TUNER 1 TUNER 2 TERMINAL P WB e oo o e e 070 PDF2 60000020 96 0606000 gt ANTENNA TERMINAL BOARD NOTE ei xe bk ea i THIS DRAWING APPLIES 7222 connector anode lead is removed or inserted NOTE Anode lead should be separated from others wires min 10mm y Anode lead must not be twisted during the operation of wiring dress
14. Sansui 289 292 709 726 MultiTech 727 211 212 213 247 Sanyo 212 247 294 265 274 i 267 268 269 281 292 709 726 cores 243 290 729 Cable Boxes Allegro 358 362 Hamlin 302 303 345 365 352 354 355 Teleview 326 366 Allegro A B Switch 361 Pioneer 315 343 Texscan 339 356 371 sees 325 Archer 325 ers 341 Tocom 317 318 346 Jerrold 304 307 308 309 325 310 318 360 363 Regency 329 325 348 362 Citizen 325 Kale Vision 335 Samsung 326 335 Universal 325 358 362 Comtronic 326 Macoih 321 Scientific Atlanta 316 323 336 337 Vid Tech 340 364 Everquest 379 Magnavox 327 334 Video 349 Signal 326 Garrard 325 NSC 335 339 368 369 Viewstar 327 354 355 372 ne 370 SL 326 Gemini 305 331 338 Zenith HT 2000 353 Sprucer 313 General Electric 367 0 311 332 342 d Zenith PM 374 Standard 335 General Instrument 304 305 306 307 Panasonic 313 320 P 308 309 310 318 phiips 325 327 347 350 Stargate 326 379 923 03460 1 6 ZP26 28 REMOTES REMOTE CONTROL Satellite Receivers Alphastar Chaparral Cheyenne Dishnet
15. 2mm tolerance See diagram RED 3 Remove cover or PTS short from RED CRT and align RED with GREEN 1mm tolerance when pared to Green PV154 923 03506 BLUE 4 Remove cover or PTS short from BLUE and cover the RED CRT Align BLUE with GREEN 1mm tolerance when compared to Green After Completion 5 7 Tighten DY Yoke Screws to 12 2 kg cm REMOVE ALL COVERS or SHORTS on the PTS con nectors Turn the Power Off CHASSIS BEAM ALIGNMENT ADJUSTMENT PREPARATION FOR ADJUSTMENT Pre Heat Pre optical focus DCU Phase Data H POSI Course and Raster Tilt adjustment should be completed Brightness 90 Contrast Max Receive cross hatch signals or dot pattern RASTER TILT adjustment should be finished SCREEN FORMAT should be NORMAL mode Adjustment procedure 1 2 Green G tube beam alignment adjustment Short circuit 2P subminiature connector plug PTS of Red R and Blue B on the CRT boards and project only Green G Put Green G tube beam alignment magnet to the cancel state as shown in Figure 1 See Figure 1 Turn the Green G static focus VR counterclock wise all the way and make sure of position of cross hatch center on screen Turn Green G static focus VR clockwise all the way Turn two Beam alignment magnet in any desired direction and move cross hatch center to posi tion found in step 3 See Figure 2 below If imag
16. 3 3K T BK56 2 3 KK16 KSB 3 3K 3 90 CK34 150P DK37 150 y dun HZ 782 Ft RK62 W DK27 RK28 PK29 AK30 3 3K OSD Buffer 100 100 100 Y 5 47K 4 ascasa 3 34 VJ Y 27 5 5 150 RK51 Xe 25 2 220 288 lr RS2J RK26 89 35 AK RK27 Oxi Ww 22 8 Bde w 10K 8 8550 T zx 28 2 150P es xcs K dd 555 T 150 es RS2J oo RK54 iss Y Y 6 66 6666666 5 gt Z gt z RoZZ2Z20H0 226 v tag ar 6666 66 5 a QHaae a x E 2 PWB to SENSOH DIST PWB to DEFLECTION B CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 4 REPLACE ONLY WITH PART NUMBERS SPECIFIED 6 1 NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC CHANNEL 5 AND NSTC COLOR BARS PCR 4P MINI CYH cyv PCG 4P MINI
17. BACK SIDE PV154 923 03506 5 6 ZP26 28 EXPLODED VIEWS 65 Wiring Diagram Back Refer to the figure below about the assembly if FOCUS PACK leads gt SCREEN from SENSOR P W B PRmake LEAD CLAMPER double loop LEAD CLAMPER MAG FERRITE CORE 133 D giren jo PAQTP0D2 PR Past POST PDC 7 PQS2 PQD1 PCBPCG make a loop MAG FERRITE CORE 133 E001 4 Tee PCBNBPL 77 ANODE B PCG PCB MRMGMBPL PQD1 make a loop 4 to SpeskeriPR B Fide 8 PQD2 make double loop 1001 NG PT PD P 4 ry FOCUS PACK SK BINDER N n y FO ae HOLDER 1007 WM PCG PURSE uA t BACK VIEW N p MA ANODE Ng LX ZCAT3035 1330 N mm 1 E Z sea _ SCREEN d Jan AL i Note for J 02 for J 01 ferrite position is on the upper clamp MARK SHOULD BE APPLY A LEAD CLAMP NO08 POWER SUPPLY LEAD CLAMP PARTS No IS 3813121 PWB MARK SHOULD BE APPLY A LEAD CLAMPIN011 LEAD CLAMP PARTS No IS 3875441 MGZ E1630MRF CLAMP
18. 2 to defeat Horizontal Drive Output if this voltage goes too high The Flyback Transformer THO1 generates a pulse called Heater Note This does not go to the CRTs as heater voltage it is used for Excessive High Voltage Detection If this voltage goes too high indicating an excessive High Voltage condition the high will be impressed on the cathode of DH15 This high is routed to pin 1 of Connector PQD2 PV154 923 03506 3 4 called PROTECT and Shut Down occurs as described above 9 Side Pincushion failure generating a High D702 and D703 The Side Pin Cushion op amp circuit is comprised of I701 If a problem occurs in this circuit it creates a High from pin 7 of I701 This high is impressed on the cathode of D702 and the zener will fire This High will be routed through D703 to pin 1 of Connector PQD2 called PRO TECT and Shut Down will occur as described above 10 Deflection Too High DP17 RP26 and RP27 RP26 and RP27 form a voltage divider The top side of RP27 is monitored by DP17 If the Deflection 115V voltage goes too high the zener DP17 will fire This high is routed through DP19 to pin 1 of Connector PQD2 called PROTECT and Shut Down occurs as described above 11 SW 9V Power Supply Too High Detection DP29 and DP30 The SW 9V voltage is monitored by DP29 If this voltage goes too high the zener DP29 will fire This high is routed through DP30 to pin 1 of Connector PQD2 called PROTECT and
19. LP11 100uH So GND a m rT TS swtsv H LP04 LP10 10uH SWtOV 158153 400 0 DIO RU4Z fo lt B 7000 5 GND PROTECTOR 5 GND i b 5 9 220 35 CP14 F 1000 500 1 5501 1 DP11 1P04 I 0 21 1 STR F66298 i GND4 m OV SHH 2214 ED12 Sun tA WJ gt C n 28V i EYELET 04 0 12 27uH 1 PROTECTOR ae cP28 CP30 3 le cpos E T 1000 35 22 470735 un 2102 3300 630 CPi5 SMG Q to DEF A PP J 1 z213 680p 500 VES i 512 384 aw 8 1 i CP16 Legs 1 1000P 500 2102 y 28v A ED13 E043 1 00A K RPO4 9 P 14 lt RD36EB3 680 4 7222 FP08 DPi3 t 10K RU4Z POCA XA 5P 0 1 50 EYELET 2104 M PROTECTOR 24046 OPIA sos i 220v 8 m NT 2228 I ul 2 2K CP17 K 2 1 rx 8 i 47 a 0 NC 1 0 05 2223 i 3E gt 1SR153 400 RPO7 RPOS DP04 anya 1 1M 3 3K HZ12B1 1 4 B GND MTL1 2J H gt 0 69A 1 0945 5 gt RU4AM 3000 1 a PROTECTOR 1 KMH DP47 1 1 470P 2K T 1 GND T 0 46 0 RP44 42 TE T 831201 oer 0 22 0 22 0
20. a ee 7 i TDAB474A EM C609 0 REAO 9602 0605 IN 100 15R153 2400 016 6 Koos 05 DIG B ie 1604 T 0604 MAGIC SH s 158139 400 DAN 85 R625 85 0607 2 2K 158139 400 3 9616 E B 2K aos vo A 55 Lom 0606 MINI GP EM R645 RP30EB4 T 1 220 bed RD1 8J A ceps r os 8618 R608 m 1 10 50 SN vo Ros 8607 1 50K B I e Ine E12R Ir P n p rr m Tm 995 4 EH vov AN Il j c amp 2200P 500 8729 5 0 68 E 0604 284673 1704 62 zs M PROTECT EYELET 255 47 25 28 SSS T mo BOY ore 5748 UTR i 88 2200P 500 220 1705 ASIJ yaa my 7428 PEE UC ER s H LINEARITY 255458 1 155133 ER i 14 4 p 55133 1 2K 56K 0 ANS 1 1 EM 15k AC t THOS 4 8 E Sa MOF 1 rr cor coe S F STS 20 f 53 2879 5 Ones cus gig G i ze ES 39000 szT 390 160 A 2H MYL K ge x 10 T 6502 Bx 58 2438 6 52 I EYELET 1 jk 4 Jp tip Bs S S x lt 87 5 T
21. 8 Press the or Cursor to change the Pattern Po sition Data in horizontal Direction to match the chart below 9 Press the or Cursor keys to change the Pat tern Position Data in Vertical Direction to match the chart below 10 Press the MULTI key 2 times to write the changed data into EEPROM o First press ADJ PAT TERN ROM WRITE is displayed for alarm o Second press writes data into EEPROM Green dots appear after completion of operation 11 Press the MUTE button 2 times to return to the DCU grid 12 Power set off ZP26 28 SERVICING SERVICE ADJUSTMENTS NORMAL MODE 01234567 RH X 02 X FE X 02 X 04 RV X 00 X 00 X 02 X 00 GH X 00 X FE X 00 X 04 GV X 00 X 00 X 02 X 00 BH X 00 X FEX 00X 04 BV X 00 X 00 X 02 X 00 DIGITAL CONVERGENCE ALIGNMENT There is no way to Calculate using a button on the remote However each time the data is saved it performs the calculate function DISPLAY selects GREEN Adj 0 selects RED Adj SOURCE selects BLUE Adj SUB PICTURE AMPLITUDE PREPARATION FOR ADJUSTMENT Sub Brightness adjustment should be finished Start adjustment 20 minutes after the power is turned on Condition should be set as follows Contrast MAX Brightness Center Press SPLIT button on Remote Control PIP ap pears on screen Select Single mode Receive NTSC white signal for the Main Picture and the Sub Picture Do not use Component Signals Connect Probe on the P852 CR
22. CYH CYV 4P MINI CYHt CYH CYV 2 26 28 5 1 Convergence Circuit 2 2 4 5 RF16 RF17 1BOK RK1 2 RK1 2J 41V H PARA F25 GND nts 0 47 250 2 3 100 SS CE M 70 25 6 47K V PARA 801 245 n SCREEN FOCUS RF10 9 06 Y roz R 6 B R B 100 25045854 1000P71 5V HV FEED RD1 2J S a NFOSy T DF02 4 26 crot DFo1 155133 1 Resa 560K 10 50 155133 35 560K ETEN RK1 2J P GND CE M au ja to FBT RD1 2J S 2 DF RF20 19 T 6B 560K 22713 25 4686 RK1 24 GFO4 254673 ELE 15467 DF03 2 4 155133 0 GND EB Lx 1 S 9205 2 jispi 10 50 CF18 68P 2K 5 25 CCSL J RAS 28 nree 15K BE44 6505 20K 4 7K to Focus 6405 CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL AN N REPLACE ONLY WITH PART NUMBERS SPECIFIED 6 2 POF 4 Oe iu m D GND 1100V NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC CHANNEL 5 AND NSTC COLOR BARS ZP26 28 SHEET 2 Magic Focus Circuit 1 2 3 4 5 6 7
23. General Electric 510 General Instrument 504 Hitachi DVD Players Dynatech Emerson Fiher Goldstar Hitachi PV154 923 03506 Hughes Network 514 Mp 510 517 Realistic 506 Sierra 1 502 Sierra 502 Sierra 502 ede ncs 511 SIS 507 19306 508 Toshiba 961 Zenith 960 5 421 Pioneer 431 Quasar 432 Radio Shack 431 ose 437 438 Seals ons 936 Sharp 441 Sherwood 449 420 443 444 445 934 Pioneer 470 Proton 910 Quasar 912 909 Sharp lt 6 ae 483 Sherwood 900 SOT 2r 486 Toshiba 509 512 Uniden 522 United 344 Zenith Drake 312 330 Zenith Satellite 328 351 378 500 Soundesign 461 498 901 902 Sylvania 433 418 419 Technics 432 Toshiba 915 Yahama 414 941 Zenith 460 461 498 901 902 Zenith CD Recorder 415 Soundesign 461 498 901 902 Techniques 912 Toshiba 915 Victor s cesi 908 LENIN 460 461 498 901 902 ZP26 28 REMOTES REMOTE CONTROL OPERATING MODE KEY FUNCTIONS KEY NAME source light power tv vcr cable dvd hd stb aspect
24. PV154 923 03506 Press select to set SPECIAL Parental Control Enter Secret Code 03 O Video Lock O Quick Lock O Front Panel Lock Movie Ratings TV Ratings Canadian Ratings Eng Canadian Ratings Frn Menu To Menu Bar To Exit Quit V CHIP RATINGS Most television programs and television movies can be blocked by TV Rating and or Individual Categories Movies that have been shown at the theaters or direct to video movies use the Movie Rating System MPAA only Movies Ratings Unblocked G General audience PG Parental guidance suggested PG 13 13 years and older R Restricted NC 17 17 years and older X Adult General TV Ratings Unblocked TV G General audience TV PG Parental guidance suggested TV 14 14 years and older TV MA Mature audience Children TV Ratings Unblocked TV Y youth TV Y7 youth 7 years and older Content Categories Dialog sexual dialogue applies to TV PG TV 14 Language adult language applies to TV PG TV 14 TV MA Sex scenes sexual situations applies to TV PG TV 14 TV MA Violence applies to TV PG TV 14 and Above TV MA F Violence fantasy violence applies only to TV Y7 Rating blocks all viewing ZP26 28 MENUS USER MENUS SETUP Press MENU and then the RIGHT LEFT arrow button to access the Special Menu
25. TRILINGUAL MENUS Press MENU to access the Setup menu Use the DOWN arrow to choose Trilingual Press the RIGHT arrow button to activate the Language menu option Use the UP DOWN arrow button to choose your language preference for the on screen menus press Select to set and confirm Press QUIT to exit and save your choice SIGNAL SOURCE Select Signal using the DOWN arrow button Activate the Signal Menu option by pressing the RIGHT arrow button If your signal comes from an outdoor antenna leave set at ANTENNA Tf your signal comes from a cable TV service select CATV 1 by pressing the DOWN arrow button Press select to set confirm your choice then press the MENU button to return to the Setup Menu Now scan for avaible channels eme ug IE SETUP SPECIAL VIDEO AUDIO Trilingual Menus Signal Antenna 1 Channel Add Del CATV 2 Channel Review Clock Set HD Focus Picture Formats Menu To Menu Bar To Exit Quit SCAN Choose Scan mode by pressing the DOWN arrow button on your remote Press the RIGHT arrow button to choose Scan Press the SELECT button on your remote to begin Scan the channel search mmm ira SETUP SPECIAL VIDEO AUDIO Trilingual Menus Signal Scan Installing Channel Add Del Channel 110 50 Complete Channel Review Clock
26. TV Mute TV Volume Up TV Volume Down Cable Channel Up Cable Channel Down Cable Flashback Cable Sat Day Up Cable Sat Day Down N A N A Cable Sat Timer Cable Sat Page Up DVD Mode TV Sources Lights Keys 5 Sec DVD On Off Selects TV Selects VCR Selects Cable Selects DVD Selects HD STB N A DVD Digit 1 DVD Digit 2 DVD Digit 3 DVD Digit 4 DVD Digit 5 DVD Digit 6 DVD Digit 7 DVD Digit 8 DVD Digit 9 DVD Digit 0 DVD Zoom DVD Display TV Mute Sound TV Volume Up TV Volume Down DVD Skip gt gt DVD Skip lt lt DVD Return DVD Marker DVD Repeat a b DVD Marker Search DVD Clear DVD Repeat Chap DVD Sub Title HD STB Mode TV Sources Lights Keys 5 Sec HD STB On Off Selects TV Selects VCR Selects Cable Selects DVD Selects HD STB direcTV Selects Aspect Ratio Formats HD STB Digit 1 HD STB Digit 2 HD STB Digit 3 HD STB Digit 4 HD STB Digit 5 HD STB Digit 6 HD STB Digit 7 HD STB Digit 8 HD STB Digit 9 HD STB Digit 0 HD STB Dash N A TV Mute TV Volume Up TV Volume Down HD STB Channel Up HD STB Channel Down HD STB Flashback N A N A STB Signal N A N A N A ZP26 28 REMOTES REMOTE CONTROL KEY NAME fav ch Channel quit up arrow down arrow left arrow right arrow Push Select menu theater record stop lt lt skip skip gt gt pause rew rewind play ff Reference TV Mode TV Favorite Channels TV Menu Quit TV Sele
27. 37 809 10805 38 845 00340 39 900 10070 40 895 10143 41 971 10024 42 874 10048 206 03282 924 10098 DESCRIPTION MIRROR MOUNT RIGHT MIRROR MOUNT LEFT MIRROR MOUNT UPPER MIRROR GLASS BACK UPPER WOOD SCREEN ASS WITH PROTECTOR ESCUTCHEON UPPER ESCUTCHEON ASS ESCUTCHEON LEFT RIGHT SIDE ESCUTCHEON LOWER ESCUTCHEON ANGLE BRACKET FRONT CENTER PANEL MAGIC FOCUS SENSOR ONLY BACK CENTER WOOD SENSOR PWB GRILL FRONT ACESS COVER WOOD SPEAKER CRX F PACK VM SUB PCB CASTER CONTROL PANEL ASY FRONT CONTROL PWB FRONT BUTTON ASSY PLASTIC LOWER REAR BOARD REAR PORT PANEL PLASTIC AB RF SW ASSY AUDIO PWB CRT B ASY G CRT B ASY B SCAN VELOCITY SIGNAL PWB TERMINAL PWB DEFLECTION PWB CONVERGENCE PWB STAND BY POWER SUPPLY PWB 2 14 CPT PWB ASY POWER CORD CRT B ASY R DEFLECTION YOKE DELTA R G B 260 SCREEN PROTECTOR ONLY OP GUIDE REMOTE CONTROL PV154 923 03506 3 1 ZP26 28 PARTS MODEL PARTS R60V26 R65W28 LOC PART DESCRIPTION LOC PART DESCRIPTION 1 NSP MIRROR MOUNT RIGHT 1 NSP MIRROR MOUNT RIGHT 2 NSP MIRROR MOUNT LEFT 2 NSP MIRROR MOUNT LEFT 3 NSP MIRROR MOUNT UPPER 3 NSP MIRROR MOUNT UPPER 4 992 10036 MIRROR 4 992 10046 MIRROR GLASS 5 NSP CABINET UPPER REAR 5 NSP BACK UPPER WOOD 6 874 10052 SCREEN ASS WITH PROTECTOR 6 874 10051 SCREEN ASS WITH PROTECTOR 7 PART OF 8 ESCUTCHEON UPPER 7 PART OF 8 ESCUTCHEON UPPER 8 833 1002
28. DEFLECTION _ N PVS PWB from POWER SUPPLY SIGNAL PW DEF PWB Ws m CPT lt S HOLDER GCREEN B N N CPTPWB SHIELD from SIGNAL P W B N005 005 MGZ E1630MRF CLAMP PURSE LOCK 08 PURSE LOCK 08 PURSE LOCK 08 FRONT SIDE blue PR brown PL Terminal base white LE Woofer R THIS DRAWING APPLIES TO R56W28 amp R65W28 2 14 CHASS ZP26 28 EXPLODED VIEWS Convergence Circuit 1 2 BV BH GND GH GND RV RH MUTE PDG 15P JL GND 5v 5 SRAM H BLK D SIZE V BLK IR IN ADJ BUSY DIG A CONV UNII TAI 016 6 DIG B MAGIC SW to DIG 5V Digital Pps 9P JL GND 57 56 GND GND GND GND 51 50 5 5
29. O ON OU P N display mute volume up volume down channel up channel down flashbk split multi pip ch c skip sleep cc 923 03460 TV Mode TV Sources Lights Keys 5 Seconds TV On Off Selects TV Selects VCR Selects Cable Selects DVD Selects HD STB Selects Aspect Ratio Formats TV Digit 1 TV Digit 2 TV Digit 3 TV Digit 4 TV Digit 5 TV Digit 6 TV Digit 7 TV Digit 8 TV Digit 9 TV Digit 0 N A TV Display TV Mute TV Volume Up TV Volume Down TV Channel Up TV Channel Down TV Flashback TV Split Screen On Off TV POP 3 Multi On Off TV Split Screen Channel Tuning Switch Channel Skip TV Sleep Timer TV Closed Captions VCR Mode TV Sources Lights Keys 5 Sec VCR On Off Selects TV Selects VCR Selects Cable Selects DVD Selects HD STB N A VCR Digit 1 VCR Digit 2 VCR Digit 3 VCR Digit 4 VCR Digit 5 VCR Digit 6 VCR Digit 7 VCR Digit 8 VCR Digit 9 VCR Digit 0 N A VCR Memory TV Mute TV Volume Up TV Volume Down VCR Channel Up VCR Channel Down TV Flashback VCR VCR Search VCR Display VCR am pm VCR Timer TV Closed Captions 1 8 Cable Mode TV Sources Lights Keys 5 Sec Cable Box On Off Selects TV Selects VCR Selects Cable Selects DVD Selects HD STB N A Cable Digit 1 Cable Digit 2 Cable Digit 3 Cable Digit 4 Cable Digit 5 Cable Digit 6 Cable Digit 7 Cable Digit 8 Cable Digit 9 Cable Digit 0 Cable Satellite Dash N A
30. When the Service Only switch is pressed the Main Mi croprocessor knows the DCU is Busy as described be fore Now the On Screen Display path is from the DCU to the Rainforest 1001 pins 33 34 and 35 The output for the DCU OSD characters is from the PDG connector pins 11 Dig Red 12 Dig Green and 13 Dig Blue These are routed through their buffers QK06 Dig Red QK07 Dig Green and 0 8 Dig Blue to the PDK1 connector pins 2 Dig Red 4 Dig Green and 5 Dig Blue then through their buffers QC24 Dig Red QC23 Dig Green and QC22 Dig Blue Then it arrives at the Rainforest IC 01 at pins 35 Dig Red 34 Dig Green and 33 Dig Blue When a character pulse arrives at any of these pins the internal color amp is saturated and the out put is generated to the CRTs Any combination of these inputs generates either the primary color Red Green or Blue or the complementary color Red and Green which creates Yellow Red and Blue which creates Magenta or Green and Blue which creates Cyan OUTPUT STKs These are output amplifiers that take the correction waveforms generated by the DCU and amplify them to be used by the Convergence Yoke assemblies for each color RV is Red Vertical Convergence correction Adjust the location either up or down RH is Red Horizontal Convergence correction Adjust the location either left or right GV is Green Vertical Convergence correction Adjust the location either up or down GH is Green Horizo
31. e ON SCREEN DISPLAY PATH e CONVERGENCE OUTPUT STKs e CONVERGENCE YOKES 3 9 ZP26 28 SERVICING CIRCUIT DESCRIPTIONS HD FOCUS SENSORS AND INTERFACE e MICROPROCESSOR e RAINFOREST IC Video Processor e SERVICE ONLY SWITCH e MAGIC FOCUS HD Focus activation control THE DIGITAL CONVERGENCE UNIT DCU The DCU is the heart of the Digital convergence circuit Held within are all the necessary components for gener ating the necessary waveforms for correction and asso ciated memories for the adjustment data and Magic Focus Data The Block above shows the relationship of the DCU to the rest of the set Note that the light being produced by the CRTs is what is used by the sensors for Magic Focus This allows the DCU to make adjustments regard less of circuit changes by actually using the light on the screen to make judgments EEPROM AND SRAM Each color can be adjusted in any one of 117 different locations The internal workings of the DCU can actu ally make 256 adjustment points per color These ad justment points are actual digital data stored in memory This data represents a specific correction signal for that specific location When the Service Technician makes any adjustment the new information must be stored in the EEPROM The EEPROM only stores the 117 different adjustment points data the SRAM interpolates to come up the additional 139 adjustment points for a total of 256 per color The EEPROM data is s
32. following circuit Connector PQD2 pin 1 Q916 the Relay Driver on the Sub Power Supply PWB and the Relay 5901 also on the Sub Power Supply PWB The Power Supply utilizes a Shutdown circuit that produces a High from 12 different sources When any of these inputs cause a high on the Connector PQD2 pin 1 the relay disengages disabling the deflection power supply of the Power Supply Shutdown circuitry can be broken down into the following groups Voltage Missing Detection Excessive Current Detection Voltage Too High Detection In the following explanation the Shutdown circuits will be grouped This will assist the Service Technician with trouble shooting the Chassis by understanding these circuits and having the associated circuit routes the technician can then Divide and Conquer SHUTDOWN DETECTION CIRCUITS EXCESSIVE CURRENT DETECTION One very common circuit used in many television products is the Excessive Current Sensing circuit In this circuit is a low ohm resistor in series with the particular power supply labeled in the drawing The value of this resistor is determined by the maximum current allowable within a particular power supply In the case of Figure 1 the value is shown as a 0 47 PV154 923 03506 3 2 ohm however it could be any low ohm value When the current demand increases the voltage drop across the resistor increases If the voltage drop is sufficient to reduce the voltage on
33. wb Source List VCR 1 Custom ep DVD O Reset TAPE LD AUX Y Menu To Menu Bar To Exit Quit Use the UP D0WN arrow buttons to go to Source List and choose a pre set Source identification Custom to create your own label or pick Reset to clear all labels If you chose Source List press the RIGHT arrow button to access the list and then use the UP DOWN arrow buttons to pick an ID from the list Press SELECT to save your choice If you wish to customize your source ID go to Custom and press the RIGHT arrow button Cycle through the character choices using the UP DOWN buttons and cycle through the character slots using the RIGHT arrow button Press QUIT to save your choice and exit PV154 923 03506 1 12 Note Use for blank spaces To delete a Source ID select Reset then press the SELECT button You will be asked Are You Sure Press SELECT again and then press QUIT to save and exit FAVORITE CHANNELS SETUP SPECIAL VIDEO AUDIO Favorite Channels MOVIES 6 SPORTS NEWS Menu To Menu Bar To Exit Quit Group your favorite channels into categories Use the UP DOWN arrow to choose Favorite Channels Press the RIGHT arrow button to activate Favorite Channels option Use the RIGHT arrow button to choose a Favorite Channels category such as Movi
34. 22 0 22 1 8 om RE1 2J RE1 2J RE1 2J RE1 2J 1 SM pres 502 38 8 RD1 2J 59 0 50 xe m Fazov8a BAVE 1 i 500 7159 PROTECTOR CP37 1233 100 15 a zx SMG SE115N SN ver 1 35 CP36 DP19 254673 3 14 SS 1 50 22 50 SS 27 SMG opis 155133 c o alal 7512 1 25 2 RP34 2 eat ean 04 6 BK ET RES GND3 HV E 1 RPi3 1 15 12K 220 n n ban n to DEF E DP20 RP35 34 whic was 1 55133 156133 47K En CP19 RO30EB3 220 10 5 Bi 1 o 1 50 MG 1 R 1 ag SLZ 981 1 40 1 A 1900 V ca XHAYPRO 1 1 T 1 1 RP30 470 1 1 gt 1 CP40 1000 16 1 SMG 1 7202 7201 EYELETD lt lt EYELET 1 1 af m 6 6 6 gt TV 1 e v g gt g gt p E 602 XA 6P Paoa 25 2 5 a a PROTECT ON p to POWER SUPPLY to POWER SUPPLY CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 6 4 NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 1
35. 4735 we 0 47 35 158 3 3M J SMG 7147 35 10K 1 MTLA 8J PR SMG ag A PROTECT GND 8960 OCP a 470 Swt7V 9931 C944 33 8959 a 10 50 GND 10K T 3v 0919 c o 0 i UU u i EE 16 66 cee ce See e i So soos WB 52 LIVE SURGE GND MOLEX 5289 JST VToeP TCE 2H PTV CONNECTOR to MAIN POWER SUPPLY MOLEX 5289 PTN CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 4 6 6 NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC ZP26 28 SHEET 6 REPLACE ONLY WITH PART NUMBERS SPECIFIED CHANNEL 5 AND NSTC COLOR BARS it 1 4 1rcul Signal C ZP26 28 SHEET 7
36. 809 10825 30 809 10824 31 809 10826 32 809 10820 33 809 10844 34 809 10813 35 845 00340 36 900 10070 37 895 10143 38 NSP 39 809 10735 40 874 10054 901 10023 924 10114 1 888 3 ZENITH 1 888 6 ZENITH ZENITH NATIONAL PARTS P 0 Box 240007 Huntsville AL 35824 6407 DESCRIPTION MIRROR MOUNT RIGHT MIRROR MOUNT LEFT MIRROR MOUNT UPPER MIRROR CABINET UPPER REAR SCREEN ASS WITH PROTECTOR ESCUTCHEON UPPER ESCUTCHEON ASSY ESCUTCHEON LEFT ESCUTCHEON LOWER ESCUTCHEON ANGLE BRACKET MIRROR MOUNT LOWER CASTER FRONT ACESS COVER WOOD GRILL SPEAKER BACK CENTER WOOD CONTROL PANEL ASY CABINET LOWER REAR VM SUB PCB CRX F PACK DELTA R G B LENSE CONTROL POWER ASS PWB FRONT BUTTON ASSY PLASTIC SCAN VELOCITY CRT B ASY B CRT B ASY G AUDIO PWB SIGNAL PWB TERMINAL PWB DEFLECTION PWB CONVERGENCE PWB STAND BY POWER SUPPLY CPT PWB ASY POWER CORD CRT B ASY R DEFLECTION YOKE REAR PORT PANEL PLASTIC RF BLOCK SCREEN PROTECTOR ONLY OP GUIDE REMOTE CONTROL R56W28 LOC PART 1 NSP 2 NSP 3 NSP 4 992 10047 5 NSP 6 874 10050 7 PART OF 8 8 814 10257 9 PART OF 8 10 PART OF 8 11 PART OF 8 12 857 10393 13 805 10003 14 NSP 15 809 10841 16 938 10014 17 NSP 18 849 10055 19 809 10726 20 809 10836 21 965 10004 22 809 10807 23 809 10806 24 PRT OF 22 25 NSP 26 NSP 27 809 10735 28 809 10837 29 900 10071 30 900 10072 31 809 10835 32 809 10839 33 809 10838 34 809 10840 35 809 10834 36 809 10855
37. 824331585 OFF SRS STEREO H L 10 50 SHS MONAURAL H H enojo FSPOFF VMUTE2 ERRMUTE o 100K RABA Be seLL e pass f00u 2 5 3 1 100 16 Sw 5v n case mo 100 163 Sw sv o BYPASS 9 Eu nes RA38 ps w ge RAES 10 16 Ha Rez 220 ES 5 2562412 CABS PA 10 50 we RA34 12K 330 seg N Gao eg C S 8 T La Ss EM Ejs E 10 50 z 5 7 zm 2 E RA44 12K RA47 DAO4 2502412 155133 gt 44 87 49 HIFI AUDIO OUT Daoa RAS2 1K HZ 3A1 swtiav AGND AGND AGND CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 4 N 2 NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC REPLACE ONLY WITH PART NUMBERS SPECIFIED 6 11 ZP26 28 SHEET 11 CHANNEL 5 AND NSTC COLOR BARS Velocity Modulator Circuit PKEOL JUMP 220 peso RE52 470 5 RS2J RD1 8J RES1 40 2 QE22 4 PVM EH 6P VM NC GND GND
38. 9 B 55858 680H 2 ror 8608 2 49599999099 ae dk 8828 HE BME i 5 89 SH SFE NE 5 3 8 225855 8 Sas amp 5 o SS 91 007 m 7709 BN H 2 S 96 TT lt gt x 5 58 m x n n a og sk 83 ER 857 575 785 ma x98 L D 2608 a oy H Sue Sin exe o SE 190515 E ABS a gt o 0 9 5 5 10 04 i T 5 8 Brod a na 28 ET 8 28 rou 7 E k ETTU MEorvse 28 4 x x 2 E 3828 5 Se Lv sg Ex 007 gt 8709 75 9 06 o Ten 85 82 xis als els 9 B a mE 2578 007 8 51851515 os t why 594 xl ES EER 1 7 THE 5 o groo 2700 oot Gia SP Red 84 PN Qo 4 SET TETH m Piu s8 S Perd oor 9258 Oo Ed C3 95 B mne oor rl FP esou a 53 z Bagperreose z 2 E000 ad S p x 2578 2x 8 Este 9219 eid 4 stroo x00
39. E i vsu 4 BASE z tsi x 1 ABL o4 5 1 2424 i m s 58 1 FOCUS 1 cur oF m aa 8 FOCUS PACK 2402 Y EF 12 ode mz25 17001 EYELET TS cus 1 eo wj Z E 58 r 584 5 i C EIE T c720 ARES VS 1245 Y 3 gt o osz Fn 2403 858 9 1 WL K EYELET EXE Pe DRIVE 51 I s s mue g 5 GND o Lu bao 8 2 3 gt 8 ri 5 0 4 LY s A n i8 58 MYL K si lt 1 E 5 58 190 8 Sr EA EvELETIS EYELETIS Sam n 4100 b LI R748 n OUT I 50 g g zo 24 Anio 1 952 shy A Sda Sales 155133 Rot 0777 ME SESE 55 2503 2502 XX i 8730 9 EYELET EVELETA734 amp 5 00 Qui mo oe ei il 8 r sp J raw i s s X e 8 1 1 365 58 or 52 gS eae 9 280 Sd Sel So 22 2505 ATA 4 amp 875s ores H uz Ir EYELET Ses pm A TANS OQ 39 250 PR K 220K DHi3 RH 3 2
40. PSD1 DUM fom 7 Le 8 t Tia coi GND indi 88 m ng BUSY SHIN Ll Jas 4 gs A1316AN 212 016 g is gil Bas SE 10 5 o Ie lo ENABLE SES sg RGB PROCESSOR 016 BK 8 DEFLECTION CONTROL L e m CLOCK GNO M HIN S is 4 AP 50 Z E m M PBIN 402 84 x acis RC44 ik 5 Spor M YIN pum oz esce4iokl ion E 2124 CUT OFF GND d NJM7B05FA DRIVE ka SW 5V 10 ESS Reso on 980 Acsa SWH5V GND amp Zo H BLK T 47 M S D SIZEw wei C UTE 25 2412 gt l DRIVE GND 5 A V BLK ery Beg 85 03 iL 88 g 85 Swtsv RCO7 Swt5v C GND HHH SCP IN FBP IN YM P MUTE BLK 49 GND SWt35V 7 so END SWTQV swtav 1K 7 GND kl amp n 033 88 88 H S 25A1037K 1 7 3 3 SIG gem lusus gt POWER a ee av 5 2 182 500 SBY45V SW 7V E GND 5 SBY 9V m Es elt 8g SES 2 100 16 pa
41. Pause REW Rewind Play FF Fast Forward These buttons still operate the VCR while remote is in TV operating mode PROGRAMMING THE REMOTE If you re using Zenith products the remote is already programmed for most common codes For other brands or if your remote fails to control your Zenith products you ll have to program the remote Make sure the batteries are installed and follow these steps for each product 1 Turn on the device to be operated Part Number MBR6045A 924 10098 vcr cable dvd recod stop skip pause rew ff Tar LIGHT Lights keys for five seconds POWER Turns TV On and Off ASPECT Selects different picture proportion formats DISPLAY Shows current on screen settings CH CHANNEL Tunes to next higher lower available channel FLSHBK FLASHBACK Returns to the previously tuned channel MULTI Turns POP 3 feature on and off PIP CH Channel tuning switch in Split Screen mode See Split Screen section C SKIP Channel Skip Tunes to last channel viewed Tunes back to original channel after 30 60 90 120 150 or 180 seconds FAVORITE CHANNEL Select among 6 different channel classifications QUIT Leaves programming menus and clears screen of displays THUMBSTICK Menu Operation Directional Arrows and Select key Up Down arrows choose and Left Right arrows adjust menu opti
42. Pentax 708 727 Signature 2000 216 219 249 Bell amp Howell 247 Harmon Kardon 296 PHILO 275 SONY Xua e sua 232 723 724 Broksonic 221 250 255 729 Hitachi 257 270 273 292 Pioneer 210 282 726 Sylvania 275 297 705 706 707 708 Candle 727 Portland 246 727 Tatung 268 292 Penny s 268 726 Canon S 704 ProScan 216 260 266 282 srs vex 268 Jensen 292 725 Capeheart 728 272 IVC Sick 224 225 258 268 Quasar 259 295 Citizen 727 292 299 726 Toshiba 213 274 290 297 Radio 5 213 265 730 Craig Sa putka Su 212 Kenwood 268 292 726 727 Vector Research 726 727 216 220 228 240 Curtis Mathes 259 266 725 727 Magnavox 275 242 249 260 266 726 282 283 284 285 Daewoo 244 246 248 254 Video Concepts 726 727 22 Marantz 267 268 726 727 286 287 288 708 212 298 710 711 725 XR 1000 243 Daytron 246 La MGA 297 730 Realistic 212 213 265 730 726 mre 726 Mitsubishi 276 277 278 279 Saisho 722 Zenith 201 224 225 229 Electrochrome 730 280 296 297 730 Salora 297 Emerson 203 221 243 250 Montgomery Ward 216 219 249 291 293 721 722 729 gomery 2 Samsung 220 230
43. Press the UP DOWN arrow to choose Parental Control and then press the RIGHT arrow button to activate Parental Control When prompted enter the default code 7777 from the number keypad If you wish to change the code select Change Secret Code and enter the new code through the number keypad If you forget your code just reenter 7777 to reset to factory preset code Use the UP DOWN arrow button to choose your Block options press SELECT to confirm your choice e Channel Selects the channel you wish to restrict e Video Lock Selects the Video Inputs to be blocked e Quick Lock Blocks CH3 and CH4 on ANT 1 and 2 as well as all 3 video input jacks e Front Panel Lock Blocks front panel controls from being used Only Power button will work when this feature is active Now you will set the Ratings for the channel you wish to block Press the UP DOWN arrows to select the following rating formats and press the RIGHT arrow button to activate each rating menu e Movie Ratings Sets ratings based on MPAA rat ings system e TV Ratings Sets ratings based on the age of viewer and content of programming e Canadian Ratings Eng Sets age ratings for Ca nadian broadcasting Eng e Canadian Ratings Frn Sets age ratings for Cana dian broadcasting Frn For each rating menu use the UP DOWN arrow buttons to choose the level of rating you wish to block Use the SELECT button to lock or unlock the rating selection Press QUIT to save an
44. SELECTOR IXO uu esee rene pne 3 14 SUB VIDEO CHROMA 3 14 MAIN Y PR PB SELECTOR 1 0 3 14 SUB Y PR PB SELECTOR 1 04 3 14 FRONT AUDIO CONTROL IC IAO1 3 14 SRS AUDIO iiie ee ettet hane nean 3 15 PV154 923 03506 TOC 1 SERVICE ADJUSTMENTS 3 16 ZP 25 CHASSIS ADJUSTMENT ORDER 3 16 CHASSIS PRE HEAT RUN ADJUSTMENTS 3 17 CHASSIS CUT OFF SCREENS ADJUSTMENT 3 17 CHASSIS PRE FOCUS ADJUSTMENT 3 17 DCU CROSSHATCH PHASE ADJUSTMENT 3 17 CHASSIS HORIZONTAL PHASE 3 17 CHASSIS TILT RASTER INCLINATION 3 18 CHASSIS BEAM ALIGNMENT ADJUSTMENT 3 18 CHASSIS RED BLUE RASTER OFFSET 3 18 VERTICAL SIZE ADJUSTMENT 3 19 HORIZONTAL SIZE ADJUSTMENT 3 19 BEAM FORM ADJUSTMENT 3 19 LENS FOCUS ADJUSTMENT 3 20 STATIC FOCUS ADJUSTMENT 3 20 BLUE DE FOCUS ADJUSTMENT 3 20 WHITE BALANCE AND SUB BRIGHTNESS 3 20 CHASSIS HORIZONTAL PHASE FINE 3 21 CHASSIS INTELLISENSE PATTERN SET UP 3 21 DIGITAL CONVERGENCE ALIGNMENT 3 22 SUB PICTURE AMPLITUDE 3 22 SECTION 4 PARTS MO
45. Set HD Focus Picture Formats Menu To Menu Bar To Exit Quit PV154 923 03506 1 10 If certain CATV channels are not received clearly in CATV1 mode set the source to CATV2 mode CHANNEL ADD DEL DELETE Customize your channel selection list Add Channels not found by Scan Channel Search Delete channels you don t watch Channels will appear when using Channel Up Down Press the MENU button on your remote to access the Setup menu 9 H Press select to set Trilingual Menus Signal Channel 03 Scan O Add Channel Add Del 9 Erase Channel Review Next Channel Clock Set ChA Ch V HD Focus Or Keys Picture Formats Menu To Menu Bar To Exit Quit Use the UP DOWN arrow to choose Channel Add Del Press the RIGHT arrow button to activate the Channel Add Del menu option Use the UP DOWN arrow button to choose the Add or Erase option for the currently chosen channel press Select to set and confirm your choice Press QUIT to exit and save your choice or use the Channel UP DOWN buttons numbers to choose another channel to Add or Erase CHANNEL REVIEW Use the UP DOWN arrow to choose the Channel Review option Use the RIGHT arrow button to activate the Channel Review menu option mmm ira WE SETUP SPECIAL VIDEO AUDIO THEAE CHANNEL REVIEW A Ch Id 1 ca Ant 1 Scan Lock ON ON O N
46. against harmful interference when the equipment is operated in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna In crease the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experi enced radio TV technician for help The presence of the DTV certification mark indicates that this prod uct will successfully receive digital television transmissions that conform to any and all of the video formats described in the ATSC Digital Television Standard The responsible party for this device s compliance is Zenith Electronics Corporation 201 James Record Road Huntsville AL 35824 USA Digital TV Hotline 1 800 243 0000 TRADEMARKS USED IN THIS MANUAL Dolby Digital Manufactured under license from Dolby Laboratories Dolby and the double D symbol are tradema
47. any one of these circuits are activated the power supply will STOP and create a Power Supply Shut down Condition SHUT DOWN CIRCUIT DESCRIPTIONS Shut down occurs when pin 1 of Connector PQD2 called PROTECT goes High This High is routed to the Sub Power Supply PWB and is impressed on the base of the Relay Driver Transistor Q916 turning it On When Q916 turns On it removes the Power On High and the Relay S901 will disengage and removes the AC source from the De flection Power Supply Please use the Commonly Used Shut down Detection Cir cuits for the description of how the circuit works VOLTAGE LOSS DETECTION 1 Shorted 220V DP24 and DP25 Inverted by then through DP28 The cathode of DP24 is con nected directly to the 220V line If it shorts this circuit is activated and pulls the base of QP03 low This output High is routed through DP28 to pin 1 of Connector PQD2 called PROTECT and Shut Down occurs as described above 2 Shorted SW 35V DP27 Inverted by then through DP28 The cathode of DP27 is connected directly to the SW 35V line If it shorts this cir cuit is activated and pulls the base of QP03 low This output High is routed through DP28 to pin 1 of Connector PQD2 called PROTECT and Shut Down occurs as described above 3 Shorted 28V DP27 Inverted by then through DP2 The cathode of DP27 is connected directly to the 28V line If it shorts this circuit is activated and pulls th
48. available on Antenna Cable 1 source 7 26 28 MENUS sIla CIRCUIT DESCRIPTIONS CIRCUIT DESCRIPTIONS POWER ON AND OFF The power supply runs all the time when AC is applied The use of the power supply creating Stand By Voltage supplies eliminates the need for a Stand By transformer The following explanation will describe the Turning ON and OFF of the projection television The Microprocessor I001 generates the ON OFF control signal from pin 53 The logic states of this pin are High On and Low Off When the set is turned On the high from pin 53 is routed to the Relay Drivers 0003 and Q004 This turns on Q003 and its collector goes low which turns off Q004 and its collector goes High This d from the Relay Drivers will perform the following Turn on the Shut Down Power Shorted detection circuit 0917 and 0919 Turn on the Relay S901 through Q914 providing AC to the Deflection Power Supply on the Power Deflec tion PWB POWER SUPPLY SHUTDOWN This chassis utilizes 1901 as the Osc Driver Switch for the sub power supply just as the previous chassis have done The Shutdown circuit cold ground side detection removes 1901 B 1903 the Photo Coupler which isolates the Hot ground from the Cold ground and couples the Shutdown signal to the Hot Ground side Q902 on the hot ground side and Q901 which latches Q902 on When Q902 is on it removes B from pin 4 of 1901 the Vin pin The Power Supply utilizes a S
49. between a known good earth ground water pipe conduit etc and the exposed metallic parts one at a time Measure the AC voltage across the combination of 1500 ohm resistor and 15 mfd capacitor Reverse the AC plug by using a non polarized adaptor and repeat AC voltage measurements for each exposed metallic part Voltage measured must not exceed 0 75 volts RMS This corresponds to 0 5 milliamp AC Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately PV154 923 03506 A C Voltmeter Place this probe on each exposed 1500 OHM metal part Good Earth Ground such as the Water Pipe Conduit etc 10 WATT X RADIATION 1 Be sure procedures and instructions to all service personnel cover the subject of x radiation The only potential source of x rays in current TV receivers is the picture tube However this tube does not emit x rays when the HV is at the factory specified level The proper value is given in the applicable schematic Operation at higher voltages may cause a failure of the picture tube or high voltage supply and under certain circumstances may produce radiation in excess of desirable levels 2 Only factory specified CRT anode connectors must be used 3 It is essential that the service personnel have available an accurate and reliable high voltage meter 4 When the high voltage circuitry is operating properly there is no possibility of an x radiation probl
50. eo L m 5855524 87 aayvesze SE m m 88 2845285 8 t 89089 d EETSST 4142858 ezoa Lvou WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC CHANNEL 5 AND NSTC COLOR BARS NOTE 97 007 dada 557 2 seoa 9200 6 7 D 2 Vv 133HS 20 Psu2 CSPOFF 13 OSP BUSY DSP CSI DSP RESET ERR MUTE DSP 55 DSP SO PSU1 B B20P DSP REQUEST DSP DIR ERR d NnoHH S 01 CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 4 REPLACE ONLY WITH PART NUMBERS SPECIFIED Signal Circuit 2 4 4 5 6 Erra Gat gt T H RSCi 0 H 9 z x INSDET R301 0 gus 3 reer d 2 VIDEO CLAMP VIDEO LPF 1304 100 m 5 85 ase BS SHV M 03 BIS ns ascadiak ope Bo gab 1 A i 8398 P319 Lato 1311 Ee ap 326 0 gt SW 3 ANa 180 33 Loky R322 e R555 XXX 4 1506
51. factory approved mounting instructions A product mounted to a shelf or platform must retain its original feet or the equivalent thickness in spacers to provide adequate air flow across the bottom Bolts or screws used for fasteners must not touch any parts or wiring Perform leakage tests on customized installations 5 Caution customers against mounting a product on a sloping shelf or in a tilted position unless the receiver is properly secured 6 A product on a roll about cart should be stable in its mounting to the cart Caution the customer on the hazards of trying to roll a cart with small casters across thresholds or deep pile carpets 7 Caution customers against using a cart or stand that has not been listed by Underwriters Laboratories Inc for use with its specific model of television receiver or generically approved for use with TVs of the same or larger screen size 8 Caution customers against using extension cords Explain that a forest of extensions sprouting from a single outlet can lead to disastrous consequences to home and family ZP26 28 SAFETY PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO VIDEO PRODUCTS CRT ANODE HIGH VOLTAGE MEASUREMENT PROCEDURE To prevent possible exposure to radiation caused by excessive CRT Anode voltage the High Voltage Shutdown circuit senses the level of flyback pulse from Flyback Transformer representative of the actual high voltage on the CRT anode When this level exce
52. from the actual circuit used This way implementation of the latest safety and performance improvement changes into the set is not delayed until the new service literature is printed CAUTION Do not attempt to modify this product in any way Never perform customized installations without manufacturer s approval Unauthorized modifications will not only void the warranty but may lead to property damage or user injury Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines GRAPHIC SYMBOLS The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of noninsulated dangerous voltage that may be of sufficient magnitude to constitute a risk of electric shock The pictorial representation of a fuse and its rating within an equilateral triangle is intended to convey to the service personnel the following fuse replacement caution notice CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED NEAR EACH FUSE A V SERVICE INFORMATION While servicing use an isolation transformer for protection from AC line shock After the original service problem has been corrected make a check of the fol
53. ing off vertical drive for making CRT drive or cut off adjustments When Vertical Drive is defeated the Verti cal Sweep loss circuit would activate Cut Off is routed to QNO06 to inhibit the Spot line from activating and shutting off the CRTs HIGH VOLTAGE DRIVE CIRCUIT When 0102 is turned on the SW 11V will also be routed through RN15 and DNO9 and applied to the High Volt age Drive IC IHO1 at pin 14 When this occurs the IC will stop generating the drive signal that is used to produce High Voltage via 0 02 the High Voltage Driver Again this is done to prevent CRT burn especially dur PV154 923 03506 ing sweep loss CONCERNING QNO2 There are several factors that can affect the operation of QNO2 namely loss of vertical or horizontal blanking and spot killer or spot protect from a shutdown in the deflection power supply Loss of Vertical Blanking V Blk The Vertical pulse at the base of QNO5 switches 5 on and off at the vertical rate This discharges sufficiently to prevent the base of 0 04 from going high to turn it on and activate QNO2 When the 24 Vp p positive vertical blanking pulse is missing from the base of QNO5 it will be turned off which will cause the collector to go high because charges up through RN11 This in turn will cause 04 to turn on because its base pulls up high creating an increase of current flow from emitter to collector and up through RNO8 which is located ac
54. is matched NOTE To enter the I C Bus alignment menu with Power Off press the INPUT button and hold it down then press the POWER button adjustment menu will appear CHASSIS INTELLISENSE PATTERN SET UP um PV154 923 03506 NOTE This instruction should be applied when a new DCU is being replaced NOTE This instruction shows how to set up the pattern 3 21 position for Intellisense Each model has a specific set up pattern position ADJUSTMENT PREPARATION Receive NTSC RF or Video Signal With Power Off Press and HOLD the SERVICE ONLY button on the Convergence Focus PWB then press the Power On Off button and release picture appears then release Service Button to bring up Internal Crosshatch NOTE After entering the DCAM each press of the Service Only Switch will toggle between Video mode and DCU grid Press the C SKIP twice to read the old ROM data DCU Grid returns to normal with convergence cor rection ADJUSTMENT PROCEDURE 1 Make sure the Remote is in TV mode 2 Press the key on R C One additional line ap pears near the top and bottom 3 Change Remote to VCR mode 4 Press the key The PATTERN mode is displayed as shown on the right gt 5 Change Remote back to TV mode 6 Use the 6 Key to rotate Arrow Arrow rotates clock wise with each press on the 6 Key 7 Use the following Keys to switch color of patterns Display GREEN 0 o Source BLUE
55. is routed to a half wave rectifier D906 where it is rectified routed through R903 and R904 22K ohm resistors filtered by C910 clamped by a 30V Zener 0902 and made available to pin 4 of 1901 as start up voltage When this voltage reaches 6 8Vdc the internal Regulator of 1901 is turned On and begins the operation of I901 When the power supply begins to operate by turning on and off the internal Switch MOS FET the 150V DC routed through T901 in on pin 1 Drain and out on pin 2 which is the Source The Source of the internal Switch MOS FET is routed out of pin 2 through three low ohm resistors to hot ground When the internal Switch MOS FET turns on it causes the transformer to saturate build ing up the magnet field When the internal Switch MOS FET turns off the magnet field collapses and the EMF is coupled over to the secondary windings as well as the drive windings The drive windings at pin 5 produce a run voltage pulse which is rectified by D903 filtered by C909 then routed through R906 filtered again by C908 clamped by D902 and now becomes run voltage 16V for I901 DEFLECTION POWER SUPPLY VISUAL LEDS The Chassis has 4 Green and 1 Red LEDs on the Deflec tion Power Supply PWB This chassis utilizes 4 Green LEDs in the power supply cold side and a Red LED in the HOT side POWER ON MODE When the Power is turned ON the LEDs light 1 DPO06 Indicating Vcc applied to the Power Supply Driver IC IPO1 pin 4 Colo
56. return R G and B static VRs to the Best Focus point LENS FOCUS ADJUSTMENT PREPARATION FOR ADJUSTMENT Receive the Cross hatch pattern signal The electrical focus adjustment should have been completed Deflection Yoke tilt should have been adjusted Brightness 50 Contrast 60 to 70 ADJUSTMENT PROCEDURE 1 Short the 2 pin sub miniature connector on the CRT PWB PTS to produce only the color being adjusted and adjust one at a time The adjust ment order of R G and B is just an example 2 See Figure 1 Loosen the fixing screw on the lens assembly so that the lens cylinder can be turned Be careful not to loosen the screw too much as this may cause movement of the lens cylinder when tightening 3 Rotate the cylinder back and forth to obtain the best focus point while observing the Cross Hatch Observe the center of the screen Located just below the screen are the two wooden panels Re move the panels to allow access to the focus rings on the Lenses 4 After completing optical focus tighten the fixing screws for each lens 5 When adjusting the Green Optical focus be very careful Green is the most dominant of the color guns and any error will be easily seen 6 Repeat Electrical Focus if necessary STATIC FOCUS ADJUSTMENT ADJ FOC 1 3 BLUE USTMENT PREPARATION Pre Heat Run should be finished US ADJUSTMENT Short the 2pin sub miniature connector on the CRT PWB PTS to remove any co
57. save and exit Not all programming is broadcast in stereo sound or has Second Audio Programming SAP Programming that doesn t broadcast SAP may be silent when you set your Entertainment Machine on this setting ZP26 28 MENUS USER MENUS THEATER MENU mae AUDIO THEATER Theater Modes e Iv Surround Q Movies O Music O Sports Q Reset Menu To Menu Bar To Exit Quit THEATER MODES Press MENU and then the RIGHT LEFT arrow button to access the Theater menu Press DOWN arrow button to access the Theater Modes or Surround To change Theater Modes press RIGHT arrow button to choose Theater Modes Use the UP DOWN arrow buttons to choose which mode you prefer Each is a preset setup designed to enhance your viewing experience Use the UP DOWN arrow to choose Reset Reset restores the levels to their original settings Press SELECT to confirm your choice SURROUND To activate SRS or BBE choose the Surround option then choose SRS and or BBE Turn them on or off depending on your preference Press SELECT to set and confirm your choice s Press QUIT to save and exit SRS retrieves the spatial information from any stereo recording and restores the original three dimensional sound field As a result the reproduced sound is much closer to that of a live performance BBE improves the sound from all audio sources providing a more complete high defini
58. voltage of point Bis much higher than normal voltage The voltage of pin 5 of IC404 is 24V and the transistor 0403 is on Therefore pin 1 of 401 receives a voltage causing the hold down circuit to be active This results in the frequency of the hori zontal oscillation and deflection to be stopped and then the set goes into stand by mode X RAY PROTECTION Check the X Ray protection circuit using the following steps Turn the set on and input a color bar signal Check the voltage to make sure it is correct If is 148 to 160 VDC the power circuit is defective To check the operation of the hold down circuit apply DC 6V 0 5 to point If there is no raster the set is operating properly and doesn t need to be repaired P1407 H V Block R1455 PV154 923 03506 11 ZP26 28 SAFETY TABLE OF CONTENTS SECTION 1 OVERVIEW OVERVIEW aenea ntu eee 1 1 ON SCREEN DISPLAY 1 3 REMOTE BUTTON DESCRIPTIONS 1 5 PROGRAMMING THE 1 5 REMOTE BRAND CODES 1 6 REMOTE CODES a 1 7 OPERATING MODE KEY FUNCTIONS 1 8 USER MENUS u ass Guy rov eeu 1 9 USER ae ings 1 10 SETUP 220 eeu 1 10 cdi 1 11 VIDEO MENU ea aon eere 1 15
59. 20VAC 7 26 28 lt 4 1 REPLACE ONLY WITH PART NUMBERS SPECIFIED CHANNEL 5 AND NSTC COLOR BARS Deflection Circuit 4 5 5 lt A 2E x ox 002000 777 i cere omo m onm gt gt B 1 pu 6 h UT TB ee og yg Pa i g EE rr Weegee xx 2 6 gt 6 2 2 2 2 wp 5 6 gt r 27 3 27 27 o a i
60. 4 ESCUTCHEON ASSY 8 814 10235 ESCUTCHEON ASS 9 PART OF 8 ESCUTCHEON LEFT 9 PART OF 8 ESCUTCHEON LEFT RIGHT SIDE 10 PART OF 8 ESCUTCHEON LOWER 10 PART OF 8 ESCUTCHEON LOWER 11 PART OF 8 ESCUTCHEON ANGLE BRACKET 11 PART OF 8 ESCUTCHEON ANGLE BRACKET 12 NSP MIRROR MOUNT LOWER 12 857 10393 FRONT CENTER PANEL 13 965 10006 CASTER 13 805 10003 MAGIC FOCUS SENSOR ONLY 14 NSP FRONT ACESS COVER WOOD 14 NSP BACK CENTER WOOD 15 809 10815 GRILL 15 809 10841 SENSOR PWB 16 849 10057 SPEAKER 16 938 10013 GRILL 17 NSP BACK CENTER WOOD 17 NSP FRONT ACESS COVER WOOD 18 809 10807 CONTROL PANEL ASY 18 849 10057 SPEAKER 19 814 10234 CABINET LOWER REAR 19 809 10726 F PACK 20 809 10822 SUB PCB 20 809 10836 SUB PCB 21 809 10726 CRX F PACK 21 965 10004 CASTER 22 971 10024 DELTA R G B LENSE 22 809 10807 CONTROL PANEL ASY 23 809 10811 CONTROL POWER ASS PWB 23 809 10806 FRONT CONTROL PWB 24 PART OF 18 FRONT BUTTON ASSY PLASTIC 24 PRT OF 22 FRONT BUTTON ASSY PLASTIC 25 809 10821 SCAN VELOCITY 25 NSP LOWER REAR BOARD 26 900 10072 B ASY B 26 NSP REAR PORT PANEL PLASTIC 27 900 10071 B ASY G 27 809 10735 RF SW ASSY 28 809 10823 AUDIO PWB 28 809 10837 AUDIO PWB 29 809 10825 SIGNAL PWB 29 900 10071 B ASY G 30 809 10824 TERMINAL PWB 30 900 10072 B ASY B 31 809 10826 DEFLECTION PWB 31 809 10835 SCAN VELOCITY 32 809 10820 CONVERGENCE PWB 32 809 10839 SIGNAL PWB 33 809 10844 STAND BY POWER SUPPLY 33
61. 40 240 ral RD1 8J AU 6 8K dio 2420 EYELET EYELET lt DRIVE GND4 5 15 738 DH14 E gros SY ia Aia 1806 2 116 5 1 50 TETAS 81 gt 8 871 8725 8 528 25 Agents 330 58 Hz22 2L 15K 5 amp L q ESiF E Bel 3 d 0708 288 0712 pow 155133 1 ES1F 51K E Y sper C717 0 01 1 5t 2421 ela a sa 5 2422 EYELET 157 5 z 2 CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 4 REPLACE ONLY WITH PART NUMBERS SPECIFIED 6 5 NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC CHANNEL 5 AND NSTC COLOR BARS ZP26 28 SHEET 5 Power Supply Circuit 1 7 aia SRS 29V 01 PIN HEADER XA 1901 1 2236 2227 Ce 1 30A 1 E090 E990 ul gt 8 279 Pt SRS 29V SRS EYELET F
62. 601 pin 4 to enlarge the vertical size In some cases this control signal is called A SIZE It s the same function between DIG SIZE and A SIZE TO CONVERGENCE YOKES The DCU provides compensation signal for deflection abnormalities to the convergence output IC The Con vergence output IC in turn amplifies the signals and routes them to the convergence yokes 115V1 The Deflection transformer receives the 115V V1 DC source 115V2 The High Voltage Transformer THO1 Flyback receives the 115V V2 DC source HV PARABOLA See DF Out SCREEN 700V 700V Supplied to the screen grids on the CRTs FOCUS 12KV Focus voltage supplied to the CRTs 3 7 ZP26 28 SERVICING CIRCUIT DESCRIPTIONS 30Kv HV 30 000 volts DC supplied to the CRTs anodes TO DEFLECTION YOKES Horizontal and Vertical deflection wave forms driving the deflection yokes MAGIC SWITCH Output from the DAC1 I006 pin 7 when the customer selects HD FOCUS from the customer s menu This ener gizes HD FOCUS Magic Focus SERVICE ONLY SWITCH Enters the Digital Convergence Adjustment Mode DCAM HORIZONTAL DRIVE CIRCUIT DESCRIPTION When B arrives at the Rainforest IC 1001 pin 19 hori zontal drive is output from pin 26 The drive signal is routed through the connector PSD2 pin 5 to the Hori zontal Driver Transistor Q751 This transistor switches the ground return for pin 8 of the Driver transformer T751 28 volts is sup
63. 7 sat Ed n Ed KL E 21302 pr Pd CI E nA 310857 087 Eure w 978 0206 EU EE x 05250 variu asne 1 gt AT enu Xr 58950 s876 903 1530034 aso SET TaN 5 e a AF Ste em 7200 EO2T 2H gt 0700 T 14 TN 7 m M 90 5000 007 7209 7009 93073601 OZOH 2000 005 6708 2914 NI ax ov 5 pu 500 2000 OOF erod X3 6 8974 5 5804 a rs 1000 0109 3 91 ae BBTH e S tas es ems 5001 THE dor vo 8 teru 4 6003 N cord 4 Ld 5 100X OLTH xor B B Eje NI 0128104 S mE 8 oo m a very onem 2 gt 5 m 557 Bd D umoa 9 223187 i in 80 a 2 8 TET eere n a 88 5151 AP s cesse x 289 9674 2 StA8S TESE SE x 2 BW 4 5 gt ul vYOH 6 97 007 9900 8 El 8 nz x
64. 8 PS1 PH 9P 0 20 HZ7B2 RL30 oed 100 i EN 155133 si of E 4 SND HZ9B4 5 470K d 0121 RD1 BJ RD1 8J 53 lc 27 RL31 2 0114 1 100 GND ol DL31 155133 HZ981 Cb 227 8 2 RD1 8J RD1 8J 100uH PDS1 PH 11P 25v 100 16 5 x 2 MYL K GND 3 4 to DL28 HZ9B4 GND 4 57 i gt to 55 e 9 NC NC 9 NC 1 NC a 51 518 8 T K IAR Wr I W da T 55 55 55 55 88 58 58 95 35 95 98 98 28 85 85 S 05 1 96 5 95 PH 6P f GND o DL26 ss X 27 RL36 100 254673 D GND of DL 36 155133 HZ9B1 3 T lt H 57 B AL26 ALIS 1 0L37 DIRE 470K HZ9B4 eed RDi BJ 0L17 100 254673 057 155133 SN 227 AL27 RL17 390K 470K RD1 8J RD1 8J pd SENSOR P W B 4 1 N CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 6 3 NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC 7 26 28 SHEET 3 N REPLACE ONLY WITH PART NUMBERS SPECIFIED CHANNEL 5 AND NSTC COLOR BARS Deflection Power Supply Circuit
65. 809 10838 TERMINAL PWB 34 809 10813 CPT PWB ASY 34 809 10840 DEFLECTION PWB 35 845 00340 POWER CORD 35 809 10834 CONVERGENCE PWB 36 900 10070 B ASY R 36 809 10855 STAND BY POWER SUPPLY PWB 37 895 10143 DEFLECTION YOKE 37 809 10805 ZP14C CPT PWB ASY 38 NSP REAR PORT PANEL PLASTIC 38 845 00340 POWER CORD 39 809 10735 RF BLOCK 39 900 10070 B ASY R 40 874 10047 SCREEN PROTECTOR ONLY 40 895 10143 DEFLECTION YOKE 901 10023 GUIDE 41 971 10024 DELTA R G B 260 924 10114 REMOTE CONTROL 42 874 10049 SCREEN PROTECTOR ONLY PV154 923 03506 3 2 ZP26 28 PARTS zenith ZP26 Exploded View A R60V26 LOC B R50B26 PART DESCRIPTION 4 B 9210038 MIRROR CABINET UPPER REAR GA 1874 10052 SCREEN ASS WITH PROTECTOR 5 B 87410045 SCREEN ASS WITH PROTECTOR 833 10024 ESCUTCHEONASSY B 83310023 ESCUTCHEONASSY 5 A8 PARTOFS8 ESCUTCHEONLEFT ESCUTCHEONLOWER CASTER FRONT ACESS COVER WOOD 5 B 1809 10810 CRLL ie B 1849 10055 SPEAKER 16 A 84910057 SPEAKER CRBRETLOWERFERR efe 61 10236_ CABRETLOWERREAR _____ CRXF PACK 2 B 809 1084 DELTA RGB LENSE SCANVELOCITY TERMINAL PWB POWER CORD DEFLECTION YOKE RF BLOCK 40 B 1874 10054 SCREEN PROTECTOR ONLY e 801 10023 OP GUI
66. 903 0910 2115 SQ 0912 395 1307 1 cos T Wy 2 1 SRS 29V SAS 4700 250 120 250 E A 1 d Cais 1000 50 Z 0 22 50 ma GND s rud KMH C NIAE 1 680 500 TE rA sx 15K 1806 1 1235 1226 15 RD1 2J N 2205 F902 29V ND 0901 R305 gt PA 2207 8903 R904 390K R906 EYELET 22K 22K RE4 2J 68 0803 1 AZIM RE1J RD1 BJ 18H153 400 L909 gt 2206 POS gt 4 1 4 1 EYELET E 0 1 to SIGNAL 585 8 1581 0902 2 7 C909 1 2237 z228 kou 47 35 1 100 50 z222 1 Y 22 1 v zu yk zeae EYELET EYELET EYELET EYELET i T n A 5902 1 0 01750 i 904 1901 2200P 50 ca 47008 STR G6632 i cK 1 E HP d 1 eese ACIEM an Y dm 2223 2242 1 0914 IU See Dy T a 1 158139 400 i S REG 8 1 1 EYELET Taten Y pete 907 3300P 630 1 LI 8907 15 ca 15 1243 1 RDiJ i gt t T7959 T x 5 1 EYELET 1 1 8 1 m 3 55 1 JI Hi 1 22 cave mu yas 1225 7244 X 1 8 i EYELET 8909 _ 680 poop 1 1 MTL1 2J P 1 C948 38 1 1200 50 85 n912 0 82 1 051 R968 820 1 5 seviov m PIN HEADER XA 5910 8911 L918 AC SIG 1 2238 z229 ges
67. AM SLEEP TIMER SET TI SLEEP Displays time left on Sleep Timer before TV shut off PV154 923 03506 APPROVALS Ul C UE NOM iecit ennt UL C UL UPC Code ce rens 56 04464200622 8 65 04464200612 9 SERVICE LIMITED WARRANTY Service Support Level M Module Level Warranty Parts CRT Labor 1 Year 2 Years 1 Year MAIN PICTURE SOURCE Displays Main Picture Source Active source highlighted MONTH DATE YEAR Shows current month date and year ANT 1 110 CHANNEL LABEL Displays channel label you 10 00AM Jj have chosen 14 2002 H FOX Displays clock setting PICTURE FORMAT Shows current Theater mode setting ZP26 28 OVERVIEW OVERVIEW FRONT CONNECTIONS channel power NN menu source volume select exit 4 S Video Video L Mono R REAR CONNECTIONS S Video Input 1 and 2 Connections available for some high end equipment that provides even better picture Inputs 3 and 4 Y PB PR and Audio L R Component Video Some top of the line DVD players use what is called component video for extremely accurate picture reproduction Refer to your DVD manual for further information quality ANTENNA CABLE 1 RF Connectors Antenna Cable 1 Antenna Cable 2 INPUT 3 INPUT 4 and Cable Box Used to conn
68. AUDITO MENU 1 16 THEATER MENU 1 17 POP T E 1 17 SPLILSCREIN 1 17 SECTION 2 SERVICE MENU lt PENDING gt SECTION 3 SERVICING CIRCUIT DESCRIPTIONS 3 1 POWER ON AND OFF a a sssssassaaasassa 3 1 POWER SUPPLY SHUTDOWN 3 1 STAND BY MODE 3 1 HOT SHUT DOWN SENSING CIRCUITS 3 1 COLD SHUT DOWN SENSING CIRCUITS 3 1 POWER SUPPLY SHUTDOWN CIRCUIT 3 2 SHUTDOWN DETECTION CIRCUITS 3 2 DEFLECTION SHUT DOWN CIRCUITS 3 2 SHUT DOWN CIRCUIT DESCRIPTIONS 3 3 SUB POWER SUPPLY VISUAL LED 3 5 VOLTAGE LOSS OR EXCESSIVE LOAD DETECTION 3 5 VOLTAGE TOO HIGH J 3 5 SHUT DOWN CIRCUIT eere 3 5 B GENERATION FOR SUB POWER SUPPLY 3 6 DEFLECTION POWER SUPPLY VISUAL LEDS 3 6 DEFLECTION POWER DRIVER GENERATION 3 6 DEFELCTION GENERAL INFORMATION 3 7 MAIN 55 3 12 006 uu oett 3 13 DACS 1007 rna 3 13 LEVEL SHIFT 1004 s iieri n tentat 3 13 BD Y C 18012 3 13 MAIN VIDEO CHROMA 1501 PREPARATION IC 3 14 RAINFOREST 1 01 VIDEO CHROMA PROCESSOR 3 14 A N
69. B MINI 1P GND RD1 2J S 27 PVMS EH 6P VM VM NC GND GND GND GND NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC CHANNEL 5 AND NSTC COLOR BARS CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 1 6 12 7 26 28 SHEET 12 REPLACE ONLY WITH PART NUMBERS SPECIFIED
70. CLEAR ZP26 28 SERVICING SERVICE ADJUSTMENTS CHASSIS PRE HEAT RUN ADJUSTMENTS PRESET EACH ADJUSTMENT VR TO THE CONDITION SHOWN BEFORE PRE HEAT RUN 1 Red and Green Drive VR on the CRT PWB This is part of the Service Menu Set each to To Enter Service Menu press the SOURCE button and hold then press the Power Button Set comes on and displays Service Menu 2 SCREEN VR ON FOCUS PACK Pre Set fully counter clockwise 3 Focus VR on focus pack Pre Set fully clockwise 4 Allow set to operate at least 30 Minutes before beginning adjustments CHASSIS CUT OFF SCREENS ADJUSTMENT ADJUSTMENT PREPARATION Pre Heat Run should be finished Be sure Screen Color Temperature setting is in the COOL mode Room Light should be minimal ADJUSTMENT PROCEDURE 1 Go to 1 ADJ Mode With power Off press the SOURCE button on the front panel and hold down then press the POWER ON button and release both buttons The Service Menu is displayed 2 Set R DRV COOL to center data value 3F 3 Set G DRV COOL to center data value 3F 4 Confirm that the R G and B CUTOFF COOL data settings are 80 5 Adjust Screen VRs on Focus Pack fully counter clock wise 6 Choose SERVICE item 1 of IC ADJ Mode Select CURSOR RIGHT and the Vertical will collapses 7 Adjust any Screen VR Screen VR should be turned clockwise gradually until that particular color is barely visible 8 Repeat for the other tw
71. DE 924 1014 JREMOTECONTROL PV154 923 03506 5 1 7 26 28 EXPLODED VIEWS ZP28 Exploded View PV154 923 03506 5 2 35 A R56W28 Eum PART DESCRIPTION ks rsp MFFORMBUNTLEET 4 B 592 0045 MIRRORGUSS 4 A 992 10047 MIRROR GLASS GLASS 6 B 874 10051 SCREEN ASS WITH PROTECTOR 6 1874 10050 SCREEN ASS WITH PROTECTOR ASS WITH PROTECTOR B 6814 10235 ESCUTCHEON B14 10257 ESCUTCHEON ASS 8 JA ____ 8 ESCUTCHEON LEFT RIGHT SIDE PART OF 8 ESCUTCHEON LOWER FRONT CENTER PANEL 16 B ___ 38 B SPEAKER E SPEAKER CASTER SW ASSY SIGNAL PWB TERMINAL PWB POWER CORD CRTB ASY R 42 B 874 10049 SCREEN PROTECTOR ONLY Far A 67410048 SCREEN PROTECTOR ONLY 206 03282 GUIDE JAB JAB 924 10098 REMOTE CONTROL ZP26 28 EXPLODED VIEWS 50 Wiring Diagram Back PV154 923 03506 PAQ1 PL PDC1 make a loop MAG FERRITE CORE 133
72. DEL PARTS 4 1 SECTION 5 DIAGRAMS 7P26 28 EXPLODED VIEW eiie ee nen 5 1 50 WIRING DIAGRAM BACK 5 2 60 WIRING DIAGRAM BACK 5 3 50 60 WIRING DIAGRAM 5 4 56 WIRING DIAGRAM BACK 5 5 65 WIRING DIAGRAM BACK 5 6 56 65 WIRING DIAGRAM 5 7 7P26 28 SRS 20 ete ettet noe 5 8 SECTION 6 SCHEMATICS CONVERGENCE CIRCUIT 1 2 6 1 CONVERGENCE CIRCUIT 2 2 6 2 MAGIC FOCUS CIRCUIT 6 3 DEFLECTION POWER SUPPLY CIRCUIT 6 4 DEFLECTION CIRCUIT een trn 6 5 POWER SUPPLY CIRCUIT 6 6 SIGNAL CIRCUIT 1 4 ieri eoe enn 6 7 SIGNAL CIRCUIT 2 4 uuu 6 8 SIGNAL CIRCUIT 3 4 eie ee oen 6 9 SIGNAL CIRCUIT 4 4 6 10 SRS CIRCUIT ash 6 11 VELOCITY MODULATOR 6 12 7 26 28 TOC OVERVIEW OVERVIEW R56W28 amp R65W28 R50V26 amp R60V26 The R56 65W28 and R50 60V26 are HDTV Monitors This means that most of the components of a HDTV are present ex
73. ECHE m em sue v Ir 8 mere H pes swrsv J swrssv SBY49V o 651 100 16 EA sevtav EROTECTZ TO 5 1 aa Set CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL 4 REPLACE ONLY WITH PART NUMBERS SPECIFIED 6 8 TO TERMINAL PWB NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC CHANNEL 5 AND NSTC COLOR BARS ZP26 28 SHEET 8 Signal Circuit 3 4 1 2 3 4 5 6 7
74. ENT PROCEDURE NORMAL MODE 3 Receive any NTSC crosshair signal 4 Screen Format is NORMAL 5 Press the SERVICE ONLY switch on the convergence PWB and display the Digital Convergence Cross hatch pattern 6 Mark the center of the Digital Convergence Cross hatch Pattern with finger and press the SERVICE ONLY switch to return to normal mode 7 Enter the IC Bus alignment menu and select Item H POSI and adjust the data so that the center of Video matches the location of the Digital Cross hatch pattern noted in step 4 8 Exit from the Menu 16X9 HD Mode Adjustment NOTE I2C Service Menu Can Not be entered in the 16X9 HD Mode 9 Receive any 2 14H signal 10 Change Screen Format 16X9 HD mode 11 Press the SERVICE ONLY switch on the deflection PWB and display the Digital Convergence Cross hatch pattern 12 Mark the center of the Digital Convergence Cross hatch Pattern with finger and press the SERVICE ONLY switch to return to normal mode 13 Enter the I C Bus alignment menu and select Item 9 H POSI 14 Press SELECT key on R C H POSI option is changed to HD mode H POSI H appears H POSI of 16X9 HD mode data can be changed 15 Adjust the data up or down slightly 16 Exit from the IC Menu 17 Change Screen Format to 16X9 HD mode 18 Confirm that the Center of Video matches the Cen ter of the DCU Crosshatch determined in step 12 19 If center is not correct Repeat steps 12 through 18 until center
75. GND PVMB EH 4P VM 2541371 NC GND PVMG EH 4P GND PVMR EH 4P VM VM NC GND KE41 24 10 50 ress 2 0602 100 4 AHZ22 2L Leo2 100 7608A 5 REES 100K EH 5P RD1 2 S 220 NC 100 DEOS 155139 400 25 4 7 250 RD1 8J 2SA1837 DEO4 GE24 RE71 155139 400 5 Bo 2sa1837 47 QES ce NE24 RD1 8J T T GE25 72 20 2804793 56K iea Ro1 8J PBK 6 2 REt3 CE07 GEO4 GND CEO1 47 50 10 25 45 14 CE13 10000 500 nE27 1000997500 1 1K RD1 82J CE30 56 500 56 500 T RE2B Y 18 CE16 10 50 15 4700 escas GE07 B C B C esai283 100 O C DE17 x 155133 4 DE18 155133 5 155139 400 RE77 220 RS3J 7 220853 1 tro sueco GND GND GND 68K REGS 100K m RE70 14 8 2 RD1 8J Q d RE10 RE18 12K 56 10 50 7 E 56K GE11 10175 SA4283 REOS 9 26 1 feet 2864793 0235 Tes DE 155 139 400 10000 500 28C3468 e CE10 47 50 K 8 RDi gJ RE6B47 RSS 3 3K 01 2_5 8 RE76 PZV EH 4P VM GND 2 tro cer PH
76. IMITED WARRANTY Digital Convergence 9 Point Digital Service Support Level M Module Level Color Temperature Cool Warm STD Warranty Parts CRT Labor 1 Year 2 Years 1 Year Comb pl ud Digital 3D Y C R56 65W28 SPECIFICATIONS Horizontal Lines Resolution 1200 VIDEO Picture In Picture 2 Tuner Picture Tubes cr re etes 7 LFM Advanced features Light Sentry Detail Enhance Su Resolution Display 540p or 10801 per Contrast Gamma Correc MINOT 1st Surface Glass tion Auto Flesh Tone Wide Lens Enhanced HD VIDEO AIT Tuning System NTSC Up Converter AUDIO Lens Elements 4 Front Surround Yes Leis S MR Red amp Green Color Purity Mono Stereo MTS SAP MTS SAP Screen w Surface Diffuser 160 Viewing Angle Bass Treble Balance Tone Control Yes Scan Velocity Modulation Advanced SVM Total Audio Watts 24W 2 x 12W Dynamic aa Yes Auto Noise Cancel Yes Digital 9 Point Digital Audio BOOSE Loudness Picture In Picture 1 Yes SPECIAL FEATURES Pictu
77. If the voltage increases the voltage at the voltage divider or the cathode of the zener diode will rise If it gets to a predetermined level the zener will fire This action creates a Shutdown Signal SHUT DOWN CIRCUIT Shut down occurs when the shutdown Photo Coupler I903 is activated by pulling pin 2 low When 1903 is activated by pulling pin 2 low it gives a ground path for the emitter of the LED inside I903 The light produced by turning on this LED turns on the internal photo receiver and generates a high out of pin 3 This high is routed to the base of 0902 turning it on This grounds pin 4 of 1901 removing Vin and the power supply stops working The reason for the photo sensor 1903 is to isolate hot and cold ground 3 5 ZP26 28 SERVICING CIRCUIT DESCRIPTIONS GENERATION FOR SUB POWER SUPPLY DRIVER Vcc for the Driver IC is first generated by the AC input This voltage is called Start Up Voltage 1901 requires 16V DC to operate normally It will begin operation at 6 8V DC on pin 4 of I901 When AC is applied AC is routed through the main fuse F901 a 6 Amp fuse then through Line filters L901 and L902 to prevent any internal high frequency radia tion back into the AC power line After passing the fil ters it arrives at the main full wave bridge rectifier D901 where it is converted to 150V DC voltage to be supplied to the power supply switching transformer T901 pin 1 One leg of the AC
78. MULTI key TWICE to store the information 12 When Green dots are displayed press the MUTE key on remote 13 Press the SERVICE ONLY switch to return to normal video mode PHASE MODE Display Format NORMAL Data ADJUSTING Address Data Value 4 and 6 keys on Remote PH H BF 2 and 5 keys on Remote PH V 07 Cursor Left t and Right u on Remote CR H 4C Cursor Up p and Down q on Remote CR V 0 CHASSIS HORIZONTAL PHASE COARSE ADJUSTMENT 3 17 ADJUSTMENT PREPARATION Cut Off DCU Phase adjustments should be finished Video Control Brightness 90 Contrast Max ADJUSTMENT PROCEDURE WIDE MODE 1 Receive any NTSC crosshair signal 2 Screen Format is WIDE 3 Press the SERVICE ONLY switch on the convergence PWB and display the Digital Convergence Cross hatch pattern 4 Mark the center of the Digital Convergence Cross hatch Pattern with finger and press the SERVICE ONLY switch to return to normal mode 5 Enter the Bus alignment menu With Power Off press and hold the SOURCE button on the front panel then press the POWER button and Release both buttons ZP26 28 SERVICING SERVICE ADJUSTMENTS 7 Select Item H POSI and adjust the data so that the center of Video matches the location of the Digital Crosshatch pattern noted in step 4 Exit from the I C Menu 10801 HD MODE ADJUSTMENT 1 7 Receive any 1080i 2 14H signal and select that input Press the SERVICE ONLY switch on the def
79. QS2 make a loop PQD2 make double loop 01 to Speaker PR to CONTROL PWB 4 SK BINDER 3763752 make a loop CATCH HOLDER BACK VIEW US G RENG 1 lt 4 Focusg 5 SCREEN B WA le n CPTPWB G 0 double loop MARK SHOULD BE APPLY A LEAD CLAMP N008 LEAD CLAMP PARTS No IS 3813121 MARK SHOULD BE APPLY A LEAD LEAD CLAMP PARTS No IS 3875441 make double loops xj D DEFLECTION ANTENNA TERMINAL BOARD THIS DRAWING APPLIES TO R60V26 ZP15 CHASS BACK SIDE PV154 923 03506 5 4 ZP26 28 EXPLODED VIEWS 50 60 Wiring Diagram Front lt DN z eem L from TERMINAL PW PFS from SIGNAL PB PFS b CONTROL CONTROL PB SUB PWB from SIGNAL PW N B from SIGNAL PW 6 PR 0002
80. SD2 pin 7 The sig nal is routed from here to the Signal PWB to be used by different circuits The Microprocessor uses this signal for OSD positioning and for Station Detection during Auto programming within the coincidence detector The PinP unit uses this signal for switching purposes Like the read write clock positioning etc The Horizontal Blanking signal H Blk from 0706 15 also sent to the High Voltage Driver IC IHO1 pin 3 This IC uses this signal as its reference signal to produce the High Voltage Drive waveform output from pin 1 This output is routed to the driver transis tors 0 02 Then to the High Voltage Horizontal Output Transistor 0 01 This transistor switches the primary of the Flyback transformer 01 Deflection B 115V2 is sent through pin 9 and output pin 10 to the collector of the Horizontal Output Tran sistor 0 01 ZP26 28 SERVICING CIRCUIT DESCRIPTIONS A sample of the High Voltage is output from the Flyback transformer THO1 pin 12 This voltage is sent to pin 9 of the High Voltage Driver IC 01 This voltage is compared to the reference voltage available at pin 12 If there is a difference between the two voltages an error voltage is generated and output from pin 10 and input again at pin 11 where it manipulates the PWM Pulse Width Modulation signal producing the Horizontal Drive signal output from pin 1 The error signal from pin 10 is also sent to t
81. Shut Down occurs as described above 12 ABL Voltage Too High Detection DP15 The ABL voltage is generated by the voltage drop across the ABL pull up resistors RH27 and RH28 According to the Flyback current demands See ABL circuit diagram for details The ABL voltage is clamped at a maximum of 11V by DH16 If the ABL voltage goes too high the zener DP15 will fire This high is routed through to pin 1 of Connector PQD2 called PROTECT and Shut Down occurs as described above SHUT OFF DURING STAND BY During Stand By some of the secondary voltages pro duced are turned off except the STBY voltages after regulation This could cause a potential problem with the Short Detection circuits for shutdown To avoid accidental shut down 0917 also controls the activity of Q919 During Stand By the output from the Micro processor On Off pin 53 is Low This Low is inverted by 0003 and inverted again by 0004 and this Low 15 routed to the base of 0917 turning it Off This turns off Q917 because its base is pulled Low through D927 This action turns off 0917 When Q917 is off it doesn t sup ply emitter voltage to the Emitter of 0919 The base of Q919 is connected to 3 Low Detection inputs from PRO TECT 1 See the Sub Power Supply Shut Down Circuit explanation for further details PROTECT 1 monitors IC02 3 amp 4 on the Signal PWB ICO2 produces 5 5V IC03 produces 3 3V and ICO2 produces 2 2V NOTE PROTECT 1 will never go b
82. T PWB Green to check sub picture amplitude Enter 12 adjust ment Menu Press Menu and scroll through pages until TA1270 M appears ADJUSTMENT PROCEDURE 1 Go to PC adjustment Mode 2 Press MENU on remote to scroll through adjust ment pages until TA1270 M appears at the top of the page 3 Press PIP CH on remote control TA1270 M changes to TA1270 S 4 Observe P852 on the CRT PWB and change the TA1270 S SUB CNT data so that the ampli tude of the Sub Picture is the same level as that of the main picture Shown below 5 Exit Service Menu Adjust SUB CNT until peak white of PinP matches peak white of the main picture PV154 923 03506 3 22 ITEM INITIAL CONDITION FUNCTION 42 SIGNAL CHANNEL Add Del HD FOCUS PICTURE FORMATS POSITION CERES USTOMIZE CLOSED CAPTION OS CCD DISPLAY COC _ VIDEO ADVANCED SETTINGS ZP26 28 SERVICING MODEL PARTS MODEL PARTS AlL HD S models are module level repair only Parts contact information is below Voice Fax Mail R50V26 LOC PART 1 NSP 2 NSP 3 NSP 4 992 10038 5 NSP 6 874 10046 7 PART OF 8 8 833 10023 9 PART OF 8 10 PART OF 8 11 PART OF 8 12 NSP 13 965 10006 14 NSP 15 809 10810 16 849 10055 17 NSP 18 809 10807 19 814 10236 20 809 10822 21 809 10726 22 809 10814 23 809 10811 24 PART OF 18 25 809 10821 26 900 10072 27 900 10071 28 809 10823 29
83. a TP91 pin 11 rectified by DP15 filtered by CP32 and then routed through the excessive current sensing resistor RP24 3 11 ZP26 28 SERVICING CIRCUIT DESCRIPTIONS The ABL voltage is determined by the current draw through the Flyback transformer As the picture brightness becomes brighter or increases the demand for replacement of the High Voltage being consumed is greater In this case the flyback will work harder and the current through the Flyback increases This in turn will decrease the ABL voltage The ABL voltage is inversely proportionate to screen brightness Also connected to the ABL voltage line is DH16 This zener diode acts as a clamp for the ABL voltage If the ABL voltage tries to increase above 11V due to a dark scene which decreases the current demand on the flyback the ABL voltage will rise to the point that DH16 dumps the excess voltage into the 11 line ACCL TRANSISTOR OPERATION The ABL voltage is routed through the PSD2 connector pin 2 through the acceleration circuit RC62 and DC02 to the base of QX18 Under normal conditions this transistor is nearly saturated QX18 determines the voltage being supplied to the cathode of DCO1 which is connected to pin 53 of the Rainforest ICO1 During an ABL voltage decrease due to an excessive bright circumstance the base of QX18 will go down this will drop the emitter voltage which in turn drops the cathode voltage of DCO1 This in turn will pull voltage a
84. and Microprocessor Clock 2 communications between DAC2 and Microprocessor 16 Vcc IC B STBY 5V NOTE Pin 2 The IR pulse from the Remote Control is monitored when Auto Link is set IR Det P Vol AC3 Info FH Det Out 1 FH Det Out 2 FC Blue Back Gnd Magic Sw In IN5DET 11 12 13 14 Gnd Gnd Gnd SDA 15 SCL The Microprocessor also is able to turn on and off cir cuits within the 3D Y C circuit determined by customer menu set up MAIN VIDEO CHROMA 1501 PREPARATION IC The Main Video Chroma IC processes the video and chroma from the 3D Y C circuit for the main picture and pre pares it for the Flex Converter converts video into Y and chroma into Cr Cb NTSC Only Communication from the Microprocessor via pins 59 SDA2 and 60 SCL2 to I501 pins 34 and 33 respectively RAINFOREST ICO1 VIDEO CHROMA PROCESSOR The Video Processing IC Rainforest is responsible for controlling video chroma processing before the signal is made available to the CRTs Some of the emphasis circuits are controlled by the customer s menu and some of them are controlled by WEAK SIGNAL in Zenith Mod els which is AI Artificial Intelligence PV154 923 03506 Communication from the Microprocessor via pins 59 SDA2 and 60 SCL2 to the Rainforest IC pins 31 and 30 respectively ON THE TERMINAL PWB A N SELECTOR IX01 The A V Selector IC is responsible for selecting the in put source for the Main Pictu
85. and release both buttons Service Menu is displayed Adjust the Sub Brightness Number 2 SUBBRT us ing Bus alignment procedure so only the slight est white portions of the raster can be seen Exit Service Menu by pressing MENU button 4 Input a gray scale signal into any Video input and 1 11 select that input using the INPUT button on the remote or front control panel Turn the Brightness and Contrast OSD all the way up Enter 1 the Service Menu again Make the whites as white as possible using the Red and Green Drive adjustment within Service Menu 10800K Exit the Service Menu by pressing the MENU but ton on remote control Set the Brightness and Contrast to minimum Adjust the low brightness areas to black and white using screen adjustment VRs red green blue on the Focus Block assembly 10800 K Check the high brightness whites again If not ZP26 28 SERVICING SERVICE ADJUSTMENTS OK repeat steps 5 through 12 12 Press the MENU key on the remote to Exit Service Menu Remember When adjusting the Screen con trols after the Cut Off adjustment has been com pleted never adjust the controls clockwise Al ways adjust counter clockwise This lengthens tube life CHASSIS HORIZONTAL PHASE FINE ADJUSTMENT ADJUSTMENT PREPARATION 1 Cut Off DCU Phase adjustments should be finished 2 Video Control Brightness 90 Contrast Max ADJUSTM
86. and settings that restrict or block the programming that can appear on the TV Parental Control allows the user the capability of defining which program rating they consider acceptable to the younger or more sensitive viewer can be preset and turned either on or off by the user who specifies the secret 4 number code the password Viewer ratings are specified for both TV and the motion picture industry both rating systems should be used for complete coverage These ratings are based mainly on children s ages See the Parental Control menu and submenus example on the next page Things to Consider before Setting Up Parental Control View or Block options e Determine which rating you consider acceptable to the viewer For example if you choose TV PG all more restrictive ratings will be automatically blocked the viewer will not be able to see TV PG TV 14 or TV MA rated programming Do you want to block individual channels or input sources Blocks the signal sent by the equipment such as a VCR connected to the TV Audio Video input jacks Or leave unblocked then choose al lowable ratings e Lock the front panel controls so they cannot be used with the Front Panel Lock option e Select a secret password in the Set Password op tion Use the number keys on the remote Don t forget the password it is the only way you can access the Parental Control menu and change rat ing selections or turn Parental Control off
87. are two resistors of equal value One to the positive voltage 12 and one to the negative voltage 12V At their tie point neutral point the voltage is effectually zero 0 volts If the negative voltage is lost due to an excessive load or defective negative voltage regulator the neutral point will go positive This in turn will cause the zener diode to fire creating a Shutdown Signal DEFLECTION SHUT DOWN CIRCUITS There are a total of 12 Cold Ground Side individual Shut down inputs There are also 3 Hot Ground Side Shut down inputs that are specifically detected by the main power driver IC IPO1 that protect it from excessive current or over voltage of the Shut down detection circuits can be categorized by the four previously described circuits ZP26 28 SERVICING CIRCUIT DESCRIPTIONS HOT GROUND SIDE SHUT DOWN SENSING CIRCUITS INTERNAL TO 1 01 LATCHED SHUT DOWN MONITORS AC must be removed to recover 1 Pin 4 is monitored for Over Voltage internal to 01 2 01 itself is monitored for Excessive Heat This block is labeled 0 Thermal Protection Over load RECOVERING SHUT DOWN INPUT Driver IC will recover on it s own when trouble is removed 3 Pin 5 besides being used as a regulation input it also monitors low ohm resistors RP10 RP11 RP12 and RP16 All are 0 22 ohm resistors If these resistors have an excessive current condition caused by monitoring the current thro
88. ay e Off O On O Auto Mode O Tex Channel e 1 2 To Exit Quit Press Select to turn captions Display On Off or Auto On Caption text option appears if available on program Off Caption text option does not appear Auto Caption text option appears when sound is muted Press the DOWN arrow button to choose the mode C C for Closed Captions or Text for Text Use the RIGHT arrow button to choose and press Select to set Press the DOWN arrow button to go to the Channel option Use the RIGHT arrow to specify caption text Channel 1 or Channel 2 Usually this option is set to Channel 1 Press Select to set and confirm your choice Press QUIT to save and exit If the POP 3 feature is displayed on the screen the selected Closed Caption option will not appear BACKGROUND Press MENU and use the RIGHT LEFT arrow button to access the Special Menu Use the UP DOWN arrow to choose Background Press the RIGHT arrow button to activate the Background option Use the UP DOWN arrow to choose Solid or Shaded Solid Picture is not visible Shaded Picture is visible through translucent menu Press QUIT to save and exit PV154 923 03506 gt y SPECIAL VIDEO AUDIO Channel Labels Source D Favorite Channels Parental Control Security Timer
89. ble DP35 Indicating 28V B is available Colored GREEN This LED is connected directly to the 28V B line If it s lit 28V is available DEFLECTION POWER DRIVER B GENERATION START UP VOLTAGE GENERATION Vcc for the Driver IC is first generated by the AC input This voltage is called Start Up Voltage IPO1 requires 21V DC to operate normally It will begin to regulate at 14V DC on pin 4 of IP01 When AC is applied by the relay on the Sub Power Supply R901 AC is routed through the connector PQD1 Then it arrives at the main full wave bridge rectifier DPO1 where it is converted to DC voltage One leg of the AC is routed through 02 and 3 9K ohm resistors filtered by 05 and made available to pin 4 of IPO1 as start up voltage The Red LED is illuminated by this power supply When this voltage reaches 6 8Vdc the internal Regulator of IP01 is turned On RUN VOLTAGE GENERATION After the transformer TP91 is started a pulse is output from pin 8 This pulse is rectified by 2 filtered by ZP26 28 SERVICING CIRCUIT DESCRIPTIONS 05 and takes over as Run Voltage 16 3V at pin 4 of IP01 REGULATION Figure 2 is a simplified diagram of the main Power Supply used in some Projection Television chassis The primary control element of the power supply is 01 the Switching Regulator IC in conjunction with transformer TP91 These two components along with the supporting circ
90. cept for the ASTC tuner An HDTV receiver or converter box is required to view an ASTC signal The W28 models feature a 16 9 aspect ratio screen But it can display video in several different aspect ratios including 16 9 and 4 3 More features and specifications are listed below Currently the ZP 26 28 chassis is module level repair only Schematics and PCB layouts are provided to assist in troubleshooting Follow the normal procedures required for module level repair FEATURES ENHANCED HD LENS SYSTEM New 4 Element enhanced lens system improves brightness and focus over the previous 25 series and provides a more natural looking and true to life picture HD FOCUS W28 MODELS Automatic system that eliminates the need to manually adjust the picture Simply select HD focus from the onscreen set up menu and in approximately 8 10 seconds over 8 000 points on the screen are adjusted for perfect center to edge focus of the image DIGITAL FOCUS ARRAY V26 MODELS New advanced convergence technology is more accurate than previous digital convergence and is set at the factory by a computer The 9 Point system actually looks at 117 points since it interpolates between points yielding an image that is sharp from center to edge PV154 923 03506 1 1 IMPROVED HD DRIVER Most HDTVs use upconversion of analog signals line doubling to simulate an HD picture which introduces artifacts that appear as pixilated scenes due to digital c
91. ct Up TV Select Down TV Adjust Left Favorite Channels TV Adjust Right Favorite Channels TV Menu Item Select TV Menu TV Theater Modes VCR Record VCR Stop DVD Skip lt lt DVD Skip gt gt 1 VCR Pause VCR Rewind VCR Play VCR Fast Forward MBR6045 924 10098 PV154 923 03506 VCR Mode VCR Channel Map VCR Quit VCR Select Up VCR Select Down VCR Tracking Down VCR Tracking Up VCR Enter VCR Menu N A VCR Record VCR Stop DVD Skip lt lt DVD Skip gt gt VCR Pause VCR Rewind VCR Play VCR Fast Forward 1 9 Cable Mode Cable Page Down Cable Quit Cable Sat Up Arrow Cable Sat Down Arrw Cable Sat Left Arrow Cable Sat Right Arrw Cable Sat Enter Cable Sat Menu Cable Sat Info Cable Sat Buy VCR Stop DVD Skip lt lt DVD Skip gt gt I Cable Sat Guide VCR Rewind VCR Play VCR Fast Forward DVD Mode N A DVD Resume DVD Up Arrow DVD Down Arrow DVD Left Arrow DVD Right Arrow DVD Enter DVD Menu Disc Menu DVD Open Close DVD Angle DVD Stop Eject DVD Skip lt lt DVD Skip gt gt DVD Pause DVD Scan DVD Play DVD Scan gt gt HD STB Mode N A HD STB Quit HD STB Up Arrow HD STB Down arrow HD STB Left arrow HD STB Right arrow HD STB Enter HD STB Menu HD STB Info N A VCR Stop DVD Skip lt lt DVD Skip gt gt HD STB Guide VCR Rewind VCR Play VCR Fast Forward ZP26 28 REMOTES USER MENUS USER MENUS SETUP
92. d Ground side Shutdown detection circuits can be categorized as either Voltage shorted or Voltage too high VOLTAGE SHORTED DETECTION Shorted STBY 3 3 0025 on Signal PWB through PROTECT 2 to D938 on Sub Power Supply PWB Shorted SW 2 5V IC03 on Signal PWB through PRO TECT 1 to D940 on Sub Power Supply PWB Shorted SW 3 3V 1004 on Signal PWB through PRO TECT 1 to D940 on Sub Power Supply PWB 3 1 ZP26 28 SERVICING CIRCUIT DESCRIPTIONS Shorted SW 5V 1002 on Signal PWB through PRO TECT 1 to D940 on Sub Power Supply PWB NOTE PROTECT 1 will not go below 2 2V even if the 5V or the 3 3V lines are open VOLTAGE TOO HIGH DETECTION STBY 9V monitored by D933 D934 STBY 5 monitored by D935 D936 If any one of these circuits activate the power supply will STOP and create a Power Supply Shutdown Condi tion POWER SUPPLY SHUTDOWN CIRCUIT SHUTDOWN CIRCUIT There are a total of 6 individual Shutdown inputs In addition there are 3 Hot Ground side Shutdown inputs that are specifically detected by the main power driver IC I901 These sensors circuits protect I901 from excessive current or voltage POWER SUPPLY SHUTDOWN EXPLANATION This chassis utilizes IP01 as the Osc Driver Switch for the Deflection power supply just as the previous chassis have done This IC is very similar to the previous versions The Shutdown circuit cold ground side detection is used to turn off the Relay S901 via the
93. d exit Notes Select the input source first in order to use Video lock press the source button repeatedly on the remote until you select Input 1 Input 2 Input 3 Input 4 or Input 5 The same applies to unlocking the Video Lock fAnt1 and Ant 2 are set to the same signal source mode if a channel is locked it is locked on both Ant 1 and Ant 2 inputs e Be sure the TV s internal clock is set before using any Parental Control options e Text automatically appears on the screen to indicate if Parental Control Child Lock is activate PV154 923 03506 1 14 SECURITY TIMER Use the Security Timer to program your TV to turn on tune to the preset channel and then turn off automatically at the times specified Press select to set Security Timer wb 10203 O 4 AmTV On Am TV Off Mon Day of Week Channel Once Daily Weekly Off Menu To Menu Bar To Exit Quit Press MENU and the RIGHT LEFT arrow button to access the Special Menu Use the UP DOWN arrow to choose Security Timer Press the RIGHT arrow button to go to the Security Timer option You may set up to four ON OFF times for your TV Use the RIGHT arrow button to choose 1 4 then press the DOWN arrow button to go to the TV On time option Press RIGHT arrow to Set time Set time using the LEFT RIGHT and UP DOWN arrow buttons the same way you set the TV s clock Press the LEFT arrow button rep
94. d separation technology this module sepa rates using multiple lines and doesn t produce dot pat tern interference or dot crawl The 3D effect is a process of adding additional emphasis signals to the Luminance and Chrominance These signals relate specifically to transitions Transitions are the point where the signal goes from dark to light or vice versa The 3D adds a little more black before the transition goes to white and a little more white just before it gets to white It also adds a little more white just before it goes dark 3 13 ZP26 28 SERVICING CIRCUIT DESCRIPTIONS and a little more dark just before it arrives This gives the impression that the signal pops out of the screen or a 3D effect The Microprocessor communicates with the 3D Y C IC via 2 bus data and clock The communications ports from the Microprocessor are pins 59 SDA2 and 60 SCL2 to the 3D Y C 1301 pins 59 and 60 respec tively PIN DESC FUNCTION 1 Sig Det Detects active Sync from Component Y signal for 3 or4 Detects IR from Remote for Auto Link Remote Set Up Not in Zenith Chassis Activates SoundRite determined by Customer T3 Factory Use T3 Factory Use T3 Factory Use 7 Factory Use Ground Not Used in Zenith Chassis No Switch on Front Control Panel Detect Pr Cr plug insertion for Component 4 input if none then Composite is determined Ground Not Used Ground Not Used Ground Not Used Data 12 communications between DAC2
95. detec tion circuits are turned off in stand by to prevent faults triggering of the shutdown circuit Q919 supplies the high for shutdown if any of the volt age loss circuits become activated 0919 requires emit ter voltage to operated Emitter voltage is supplied from the emitter of 0917 0917 5 base is connected to the power on off line When the set is not on or turned off the power on off line goes Low This Low pulls the cath ode of D927 low removing the base voltage of Q917 turning it OFF This removes the emitter voltage from Q919 and this circuit can not function HOT SHUT DOWN SENSING CIRCUITS INTERNAL TO 1901 LATCHED SHUT DOWN MONITORS AC must be removed to recover 1 Pin 4 is monitored for Over Voltage at pin 4 of I901 2 1901 itself is monitored for Excessive Heat This block is labeled 0 Thermal Protection Overload RECOVERING SHUT DOWN INPUT Driver IC will recover on its own when trouble is removed 3 Pin 5 besides being used as a regulation input also monitors the low ohm resistors 910 R911 and R912 If these resistors have an excessive cur rent condition caused by monitoring the current through the internal Switch MOS FET the voltage will rise and pin 5 has an internal Over Voltage de tection op amp If this voltage rises enough to trig ger this op amp the IC will stop producing a drive signal COLD SHUT DOWN SENSING CIRCUITS AC must be removed to recover All of the Col
96. e Level Shift IC I004 to be brought up to 5V The Microprocessor output for Clock is pin 58 it arrives at I004 at pins 3 Clock and is output at pins 17 It arrives at the Flex Converter through the PFC1 connector pin 10 DAC1 I006 This Digital to Analog converter acts as an extension of the Microprocessor Sometimes called an Expansion IC The purpose of this IC is to reduce the number of pins fan out of the Main Microprocessor I001 The Main Microprocessor sends Clock and Data bus to the IC The output from the Microprocessor is pin 2 SDA1 and 3 SCL1 which arrives at the DAC1 IC 1006 at pins 5 and 6 respectively DAC3 1007 This Digital to Analog converter acts as an extension of the Microprocessor Sometimes called an Expansion IC The purpose of this IC is to reduce the number of pins fan out of the Main Microprocessor I001 The Main Microprocessor sends Clock and Data EC bus to the DAC3 IC The output from the Microprocessor is pin 2 SDA1 and 3 SCL1 which arrives at the DAC3 IC at pins 5 and 6 respectively PV154 923 03506 DAC1 1006 Pin Descriptions PIN DESC FUNCTION Receives Busy from DCU stopping Microprocessor 1 Busy from responding to Remote commands Receives the Low from the Main Tuner indicating 2 57 Det X Stereo signal received Places the Main Tuner into MTS mode if Stereo MTS 3 MTS Detected by Microprocessor 4 FMono Places the Main Tuner into Forced MONO mode Switches
97. e base of low This output High is routed through DP28 to pin 1 of Connector PQD2 called PROTECT and Shut Down occurs as described above 4 Shorted Deflection Transformer 0707 and 0705 or D705 The Deflection circuit generates the ac tual Drive signal used in the High Voltage sec tion If a problem occurs in this circuit the CRTs could be damaged or burnt D707 is connected to R728 which normally passes the same pulse as used for generation of the H Blanking signal This pulse is generated off the Deflection Transformer T752 The pulse is rectified by D707 This rectified volt age is normally sent to the base of 0705 keeping it On and its collector Low If the Deflection cir cuit fails to produce the pulses for rectification the base voltage of Q705 disappears and the tran 3 3 ZP26 28 SERVICING CIRCUIT DESCRIPTIONS sistor turns Off generating a High on its collec tor This output High is routed through D705 to pin 1 of Connector PQD2 called PROTECT and Shut Down occurs as described above NEGATIVE VOLTAGE LOSS DETECTION Please use the Commonly Used Shutdown Detection Circuits for the description of how the circuit works 5 28V Loss Detection RP21 RP20 DP35 DP21 and DP22 RP21 15K ohm is connected to the nega tive 28V line and RP20 15K ohm and DP35 LED is connected to the positive 28V line The Cath ode of DP21 monitors the neutral point where these components are connected If t
98. e below Order 10 11 12 13 14 15 16 17 18 19 20 21 22 22 23 24 25 26 27 28 Adjustment Item Pre HEAT 30 Minutes Cut Off Pre Focus Lens and Static DCU Phase Data Setting Horz Position Adj Coarse Horz Position Adj Coarse Raster Tilt Beam Alignment Raster Position Vertical Size Adjust Horz Size Adjust Beam Form Lens Focus Adjust Static Focus Adjust Blue Defocus White Balance Adjustment Sub Brightness Adjustment Sub Picture Adjustment Horz Position Adjust Fine Horz Position Adjust Fine DCU Character Set Up DCU Character Set Up DCU Pattern Set Up DCU Pattern Set Up Convergence Alignment HD Focus Sensor Initialize HD Focus Error Codes PIP Amplitude Adjustment Memory Initialization Procedure PV154 923 03506 Screen Format Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode 1080i HD Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode 16X9 HD Normal Mode 16X9 HD Normal Mode 16X9 HD Normal Mode Normal Mode Normal Mode Normal Mode Normal Mode Signal NTSC NTSC NTSC NTSC NTSC 2 14H NTSC NTSC NTSC NTSC NTSC NTSC NTSC NTSC NTSC Color Bar NTSC NTSC NTSC NTSC 2 14H NTSC 2 14H NTSC 2 14H NTSC NTSC NTSC NTSC NTSC DCU Data N A N A N A N A N A N A CLEAR CLEAR CLEAR CLEAR CLEAR
99. e position does not shift when Green static focus VR is turned adjustment is complete If image position does move repeat steps 2 through 6 Conduct beam alignment for Red and Blue in the same way 10 Red R focus on focus pack 11 Blue B focus on focus pack 12 Upon completion of adjustment place a small amount of white paint on the beam alignment magnets to assure they don t move CHASSIS RED BLUE RASTER OFFSET ADJUSTMENT Raster Offset is necessary to conserve Memory allocation It is very important to remember that the Red is offset ZP26 28 SERVICING SERVICE ADJUSTMENTS Left of Center and Blue is offset Right of center Please use the following information to accurately offset Red and Blue from center Also see Overlay Dimensions for further details PREPARATION FOR ADJUSTMENT Video Control should be set at Factory Preset condition Static Focus adjustment should be finished ADJUSTMENT PROCEDURE 1 With Power Off press the Service Only switch on the Convergence PWB While holding the Service Only Switch down press the Power On button Pic ture will appear without convergence correction 2 Press the Service Only Switch to receive the DCU cross hatch signal 3 Turn the centering magnets of Red Green and Blue and adjust so that the center point of the cross hatch pattern satisfies the diagram below DCU data is cleared Remember Green is Centered Red is to the left of G
100. eatedly until the cursor appears to the left of the current line item Use the DOWN arrow button to choose Day press the RIGHT arrow Use the UP DOWN arrow to choose which day of the week if necessary Press the LEFT arrow button repeatedly until the cursor appears to the left of the current line item Use the DOWN arrow to choose Channel Set the channel for the TV to tune to by entering the channel number using the number keypad Press the LEFT arrow button repeatedly until the cursor appears to the left of the current line item Use the UP DOWN arrow buttons to choose Once Daily Weekly or Off Press SELECT to confirm your selection Repeat steps 3 8 for three more events or press QUIT to save and exit Notes e Security Timer is designed to program the TV to turn on and off automatically If the On Timer turned the TV on and you change channels the Off timer is deactivated then if no remote key is pressed the TV turns off automatically after three hours e Forsafety reasons it is not recommended to use the Security Timer feature to turn your TV on and off while no one is at home ZP26 28 MENUS USER MENUS CAPTIONS Press MENU and the RIGHT LEFT arrow button to access the Special Menu Use the UP DOWN arrow to choose Captions Press the RIGHT arrow button to activate Captions option Use the LEFT RIGHT arrow to choose Display Off On or Auto option Sl Press select to set Captions Displ
101. eble The Main Mi croprocessor sends Clock and Data via 120 bus to this IC The output from the Microprocessor is pins 59 SDA2 and 60 SCL2 respectively then through the con nector PSU1 pins 2 and 1 which arrives at IAO1 at pins 4 and 5 respectively Microprocessor Data Communications circuit diagram The Microprocessor must keep in communication with the Chassis to maintain control over the individual cir cuits Some of the circuits must return information as well so the Microprocessor will know how to respond to different requests ZP26 28 SERVICING CIRCUIT DESCRIPTIONS The Microprocessor uses a combination of Bus com munication and the Serial Data Clock and Load lines for control The ZC communication scheme only requires 2 lines for control These lines are called SDA and SCL Serial Data and Serial Clock respectively SRS AUDIO 29V REGULATOR INDICATED BY D912 The SRS Audio 29V supply is generated from pin 8 of T901 This output is rectified by D910 and filtered by C915 The choke 1912 adds further filtration and C917 removes high frequency switching noise This supply is routed to the SRS Audio Output IJO1 via the connector PAQ1 pin 1 and 2 This voltage is what illuminates the Green Visual Trouble Shooting LED D912 PV154 923 03506 ZP26 28 SERVICING SERVICE ADJUSTMENTS SERVICE ADJUSTMENTS ZP 25 CHASSIS ADJUSTMENT ORDER Always follow the sequenc
102. ect cable service to the television either directly or through your cable box Variable Audio Out gt Used to connect either an external amplifier or add a sub woofer to your SA 4 surround sound system Video 1 or 2 Right Left Audio Used for stereo sound from various types of equipment Connects the video signals from various types of equipment PV154 923 03506 1 4 Monitor Out These jacks provide fixed audio and video signals which are used for recording Use S Video Output for high quality video output ZP26 28 OVERVIEW REMOTE CONTROL REMOTE BUTTON DESCRIPTIONS MODE INDICATOR LIGHTS Light indicates mode when keys are pressed SOURCE Selects available TV sources MODES TV VCR Cable DVD HD STB Switches remote operating mode to control other devices After pressing a Mode switch key wait 2 3 seconds before pressing any other key NUMBER KEYPAD 0 9 Selects channels directly and enters numerical values DIGITAL MODE DASH Use as the dash when selecting digital channel numbers MUTE Press once for Soft Mute press again for full Mute VOL VOLUME Increases the sound level Decreases the sound level SPLIT Turns the Split Screen feature on and off SLEEP TIMER Sets a preset time for the TV to turn off Turns On Off Closed caption text options MENU Displays on screen menus VCR FUNCTION KEYS Record Stop
103. ed through R954 R951 D926 to the base of 0914 This transistor turns ON and it s collector goes LOW This low is the Ground return for the Relay S901 The for the primary of the relay is the SBY 5 generated by the switching transformer pin 15 rectified by D920 filtered by C935 L915 and C936 When the relay S901 turns on the contacts close and AC is routed to the Deflection circuit power supply and the Deflection Power Supply is Energized DEFLECTION HORIZONTAL DRIVE ACTIVATION 1001 Rainforest IC When the set has AC applied one of the switch pulses generated on the Sub Power PWB is the 11V pulse from 10 of the Switching Transformer 1901 This 111 pulse is rectified by D919 and filtered by C929 This 11V DC voltage is then routed to the 9V regulator I906 pin 1 When the set is turned ON the Horizontal Drive Power supply 1906 is activated This happens when pin 2 of I906 goes high with the Power On Off control line from PQS1 pin 2 The 9 is output via pin 3 to the PQD2 connector pin 5 From here the 9V is routed through the Deflection PWB to the Signal PWB via PSD3 PV154 923 03506 connector pin 11 through the coil 1 03 to pin 19 of 1001 the Rainforest IC When this voltage is applied to pin 19 the horizontal circuit inside the Rainforest IC is activated and a horizontal drive signal is output from pin 26 This H Drive signal is routed through the PSD2 connector pin 5 to the base of the hor
104. eds a predetermined voltage the circuit shuts down the horizontal drive preventing further generation of anode voltage In this condition the horizontal drive is latched off The drive will remain off until power via remote control or front panel is re cycled from Off to Critical Safety components designated with an X in the nent designator are designed to operate the CRT at a safe operating Anode voltage and provide proper shutdown thresholds If replace ment of any of these components are deemed necessary it is impor tant to use original type Zenith replacement components After replacement is made confirm proper Anode voltage using the fol lowing procedure Measurement of the CRT Anode voltage must be performed using a high impedance high voltage meter with no visible raster on the screen and operating at nominal horizontal scanning frequency Connect a strong broadcast signal or TV signal generator operating at 15 734kHz horizontal scanning rate to the RF input After discharging the CRT connect a high impedance high voltage meter to the CRT anode Turn the television on and confirm a good signal is being displayed Reduce Brightness and Contrast settings until the picture is well extinguished If the voltage reading is higher than the maximum verify circuit component values and proper operation B VDC HV NOM HV MAX 0 BEAM KV KV 115 2 30 2 30 5 SHUTDOWN TEST PROCEDURE Equip
105. elow 2 2 V unless the 2 2V line is shorted ZP26 28 SERVICING CIRCUIT DESCRIPTIONS NOTE If the 5 5V or the 3 3V regulators OPEN the set will not go into shut down they must have a short to produce a shut down input on PROTECT 1 The set will shut down after the Screen go excessively bright but this is from the 115V over current sensor not PROTECT 1 When the power supply is in Stand By the Short Detection circuit could activate By turning off 0919 no accidental shut down operation can oc cur SUB POWER SUPPLY VISUAL LED The Chassis has 1 Green LED on the Sub Power Supply PWB This chassis utilizes 1 Green LED in the power sup ply cold side The power supply operates in two differ ent modes Standby and Projection On mode The LED is lit in the Standby or Power On mode with the AC ap plied and the TV ON or OFF SRS Audio Front 29V Regulator 29V indicated by D912 Color GREEN LED USAGE The Visual LED is very useful in Trouble Shooting With out removing the back cover some diagnostics can be made By observing the operation of the Green LED the technician can determine if the Sub Power Supply is running or not The following will examine how the LED is illuminated POWER ON ENERGIZE When the Microprocessor outputs a High from pin 53 when power is turned ON the high is inverted by Q003 to a LOW This low is inverted by Q004 to a HIGH and routed through the PQS1 connector pin 2 This high is rout
106. em Every time a chassis is serviced the brightness should be run up and down while monitoring the high voltage with a meter to be certain that the high voltage does not exceed the specified value and that it is regulating correctly 5 When troubleshooting and making test measurements in a product with a problem of excessively high voltage avoid being unnecessarily close to the picture tube and the high voltage power supply Do not operate the product longer than necessary to locate the cause of excessive voltage 6 Refer to HV and shutdown adjustment procedures described in the appropriate schematics and diagrams where used IMPLOSION 1 direct view picture tubes are equipped with an integral implosion protection system take care to avoid damage during installation 2 Useonly the recommended factory replacement tubes TIPS ON PROPER INSTALLATION 1 Never install any receiver in a closed in recess cubbyhole or closely fitting shelf space over or close to a heat duct or in the path of heated air flow 2 Avoid conditions of high humidity such as outdoor patio installations where dew is a factor near steam radiators where steam leakage is a factor etc 3 Avoid placement where draperies may obstruct venting The customer should also avoid the use of decorative scarves or other coverings that might obstruct ventilation 4 Wall and shelf mounted installations using a commercial mounting kit must follow the
107. es Sports News Sitcom Music Custom or use Up Down to create your own category Once you have chosen a category press the DOWN arrow button to pick a slot for the Favorite Channel in that category Use the NUMBER keypad to enter the channel number you want to include in that category Wait three seconds and the channel number will go into the first inset to the right Use the UP DOWN arrow buttons to choose the next channel number entry Repeat these steps for all categories To access your favorite channels categories press the RIGHT arrow button repeatedly while watching TV Use the UP DOWN arrow buttons to scroll through the Favorite Channels you have set up While in Favorite Channels Mode press the MENU button on your remote and after a short time you will see three channel Pop 3 still frame insets representing three of the six Favorite channels you have selected for that category to the right of your viewing area Movies 3 6 8 10 8 22 ZP26 28 MENUS USER MENUS Notes Favorite Channels are only available on ANT 1 source If Parental Control Ratings are locked it will disable multiple channel insets including the Favorite Channels POP 3 insets When POP 3 favorite channel is on Closed Caption option will not appear If Closed Caption is set to Auto and Mute is on Favorite Channels cannot be accessed PARENTAL CONTROL Parental Control offers the user a wide variety of options
108. ess the Audio Menu Use the UP DOWN arrow to choose one of the following options Use the RIGHT LEFT arrow buttons to adjust that option e Bass Increase decrease lower end sounds e Treble Increase decrease higher end sounds e Balance Allows you to put the sound more to the left or right channel RESET Use the UP DOWN arrow to choose Reset Reset restores the levels to their original settings Press SELECT to confirm your choice ADVANCED SETTINGS Use the UP DOWN arrow to choose Reset Reset restores the levels to their original settings Press SELECT to confirm your choice Use the UP DOWN arrow to choose Advanced Settings Press the RIGHT arrow button to activate the Advanced Settings menu Use the UP DOWN arrow to choose from the following options Press SELECT to confirm your choice e Stereo Activate stereo sound e Mono Activate mono sound Second Audio Programming Activates separate audio channel available with some programming e Internal Speakers This function is useful when first setting up external speakers or if you prefer to use only speakers from a separate stereo system e Auto Noise Cancel Use to eliminate the noise be tween stations e Loudness This function will improve the quality of both low and high frequency sounds when lis tening at low volume levels SoundRite This function will automatically adjust volume so each channel has the same average vol ume level Press QUIT to
109. g 9 8 wit RGB OUTPUT alo on UCO1 Zr STE og o RC16 2 2k x ou UNIT 37 2 2k gt 28 Sz 29 PFC2 s j 2 2k B2B sx 8 100 ASS mte GND a B B22P gt Bes s ye EX h sus 5 ot sc Jol GND PROUT US ENS 284673 d 5 PBOUT to net EE EE GND 85 ohx BA wu Bx tle O eur gt SCP IN cel gh 1 lo 3 our ANALOG 05069 80 i 2SA1037K 5 1 V MUTE4 C no 5 CC39 1 BAV S Td 9 3V 9 3 ANALOG OSD NECK Hoer oac HH RC70 100 T Lco3 3 CC40 BO 4 R630 GND Ee 100 5 gt 0020 71 100 5 100 SS GND a 81 RC34 RCB4 1k BAS 85 CLP fora PNG cake RC72 100 m 42 m 360 41 BO 1 Reet acas MASK som 272 2 5 8 CC42 BO 1 Sw 9v V BLK 3 3 9 bo EE GND p mep Ew 2 b cam STRE Sw 9v 5V p gt Ip aces SN 25 1037 4 MS o 100 1 Cy x 82 29 ik 35 100 I TW 55 E n fw y RCBi RG48 m Reso am ats 8 100 88 ARE 5 PSY SS Egan Fe 58 RG51 S PRIN Bav s si
110. he RIGHT arrow button to go to the HD Focus option Press Select to adjust color convergence automatically Press the Select Button on The Remote Control To Begin The Alignment System gt o Begin PICTURE FORMATS Fine tune High Definition and standard NTSC analog signal source images Sr 1 Press select to set Picture Formats Ant 1 26 Aspect Style Normal O Wide O Zoom O Panorama V Position 4 Comp Color Type HDTV O SDTV DVD Video Display O 1080i 540p Menu To Menu Bar To Exit Quit 9BP BON arrow to choose Picture Formats 1 11 to 540p 480i to 540p SPECIAL SSS A J CID SETUP SPECIAL VIDEO AUDIO Channel Labels Source D Favorite Channels Parental Control Security Timer Caption Text Background Menu To Menu Bar To Exit Quit CHANNEL LABELS Tune to a channel you want to label Press MENU on your remote and then use the RIGHT LEFT arrow button to access the Special Menu Use the UP DOWN arrow to choose Channel Labels Press the RIGHT arrow button to activate the Channel Labels option 6 To Change Letter B ig Y Channel Labels XXXX m Ch Labels ABC Custom CBS ESPN Reset HBO Next Ch NBC ChA chy SHOW Or Keys To Exit Quit At th
111. he Side Pin Cushion circuit through R752 This signal ma nipulates the amount of pin cushion correction depen dent upon the amount of High Voltage error voltage detected by the Side Pin Cushion op amp 1701 at pin 3 Its important to notice that the High Voltage circuit can not function without the Horizontal Deflection cir cuit providing a drive signal GENERAL INFORMATION The deflection circuit differs from conventional prod ucts It utilizes two horizontal output circuits One for Deflection and one for High Voltage There are many terms around the Horizontal circuit that are not shown on the Diagram Some of these terms are explained first The key component in the Sweep Loss Detection circuit is QNO2 This transistor is normally biased off When the base becomes more negative it will be turned on causing the SW 11V to be applied to two different circuits the Spot circuit and the High Voltage Drive circuit SPOT CIRCUIT When QNO is turned on the SW 11V will be applied to the anode of DN11 forward biasing it This voltage will then pass through DN11 It will then be clamped by DN12 and arrive at pin 3 of PSD2 It will then be di rected to the Signal PWB where it will activate the Video Mute circuitry 0023 0021 This is done to prevent CRT burns Another input to this circuit is pin 4 of PSD2 called CUT OFF This will activate when accessing certain adjustment parameters in the service mode i e turn
112. he negative volt age disappears the zener DP21 fires This high is routed through DP22 to pin 1 of Connector PQD2 called PROTECT and Shut Down occurs as described above EXCESSIVE CURRENT DETECTION Please use the Commonly Used Shutdown Detection Circuits for the description of how the circuit works 6 115V Deflection Power Supply RP24 0 02 DP18 DP19 and DP20 If an excessive current condi tion of the Deflection is detected by RP24 a 0 47 ohm resistor the base of QPO2 would drop This would turn on QPO2 and the high produced at the collector would fire zener DP18 This High would be routed through DP19 through DP20 to pin 1 of Connector PQD2 called PROTECT and Shut Down occurs as described above 7 Vertical 28V for IC 1601 Power Supply R629 Q609 D608 and DP31 If an excessive current condi tion of the Vertical B is detected by R629 a 0 68 ohm resistor the base of Q609 would drop This would turn on Q609 and the high produced at the collector would be routed through D608 through DP31 to pin 1 of Connector PQD2 called PRO TECT and Shut Down occurs as described above VOLTAGE TOO HIGH DETECTION Please use the Commonly Used Shutdown Detection Circuits for the description of how the circuit works 8 Excessive High Voltage Detection DH17 RH13 and DH15 is sensed from the Heater Voltage gen erated from pin 5 of the Flyback Transformer 01 Also DH14 sends a high command to the Horizontal Driver IC
113. hutdown circuit that can trigger Q902 from 5 input sources 1 of these Short Detection circuits are not operational in Stand By mode 1903 is activated by a Low being applied to pin 2 which forward biases the internal LED The light from this internal LED is then coupled to the receiver transistor The receiver transistor turns On and output a High from pin 3 This high is routed to the base of Q902 turning it On which grounds out the Vin at pin 4 of 1901 disabling the power supply All of the Power Supply Shutdown circuitry can be broken down into the following groups Voltage Missing Detection Voltage Too High Detection In the following explanation the Shutdown circuits will be grouped This will assist the Service Technician with trouble shooting the Chassis by understanding these circuits and having the associated circuit routes the technician can then Divide and Conquer STAND BY MODE As indicated in the Power On Off circuit diagram expla nation 3 of the 6 shut down inputs are not active when the set is in standby PV154 923 03506 Shorted SW 2 5V 1 03 on Signal PWB through Pro tect 1 to D940 on Sub Power Supply PWB Shorted SW 3 3V 1004 on Signal PWB through Pro tect 1 to D940 on Sub Power Supply PWB Shorted SW 5 1002 on Signal PWB through Pro tect 1 to D940 on Sub Power Supply PWB These SW voltage loss sensing circuits are defeated be cause the Shorted SW Switched power supply
114. is point you have three options Select a pre set channel label by choosing Ch Labels ustomize a channel label by choosing Custom Ch Delete a channel label entirely by choosing Reset ZP26 28 MENUS USER MENUS Use the UP DOWN arrows to choose an option If you chose Ch Labels press the RIGHT arrow button to access the preset channel label list and scroll through this list using the UP DOWN arrow buttons When you find the appropriate label for the channel press the SELECT button If you select Custom Channel press the RIGHT arrow button once and then use the UP DOWN arrow buttons to select individual letters and LEFT RIGHT arrow buttons to choose placement of letters If you wish to delete a channel label choose Reset using the UP DOWN arrow buttons and then press the SELECT button on your remote You will be asked Are You Sure press SELECT again if you are sure Use CHANNEL UP DOWN buttons or the NUMBER KEYPAD and choose another channel to label Repeat steps for all channels you wish to label Press QUIT to save and exit SOURCE ID Choose preset names or create your own titles for available picture sound input sources Use the UP DOWN arrow to select Source ID Press the RIGHT arrow button to activate the Source option Use the RIGHT arrow button to choose In 1 In 2 3 In 4 or In 5 for front video jacks Press select to set SPECIAL Source I D N1 O IN2 OIN5 OIN3 OIN4 A
115. ital module manipulates the convergence correction waveforms that it is producing to force the convergence back into the original memorized configuration When all cycles have been completed the set will return to the original signal and the convergence will be corrected In most cases activating HD Focus will allow the set to correct itself without further adjustments EXPLANATION OF THE DIGITAL CONVERGENCE INTER CONNECT DIAGRAM INFRARED RECEIVER During normal operation the IR receiver directs it sig nal to the Main Microprocessor where it interprets the incoming signal and performs a predefined set of op erations However when the Service Only Switch is pressed the Main Microprocessor must ignore remote control commands Now the DCU receives these com mands and interprets them accordingly The Micropro cessor is notified when the DCU begins its operation by ZP26 28 SERVICING CIRCUIT DESCRIPTIONS the BUSY line As long as the BUSY line is active the Main Microprocessor ignores the IR signal ON SCREEN DISPLAY PATH MICROPROCESSOR SOURCE FOR OSD The On Screen Display signal path is shown with the normal OSD information such as Channel Numbers Vol ume Graphic Bar Main Menu sent from the Main Micro processor to the Rainforest IC 1001 pins 37 38 and 39 These are positive pulses about 5 V p p and about 3uS in length dependant upon their actual horizontal time for display DCU SOURCE FOR OSD
116. izontal drive transistor 0709 on the Deflection PWB The collector of Q709 produces a drive signal routed through the drive transformer T702 and output from pin 4 to the base of the Deflection Horizontal Output Transistor 0777 to begin driving the deflection circuit which in turn ac tivates the High Voltage circuit The sub power supply in the chassis works very similar to the previous models with some very significant exceptions The use of the power supply creating the SBY 11V supply eliminates the need for a Stand By transformer The following explanation will describe the Sub Power Supply Shut Down Circuit VOLTAGE LOSS OR EXCESSIVE LOAD DETECTION The second most common circuit used is the Voltage Loss Detection circuit This is a very simple circuit that detects a loss of a particular power supply and supplies a Pull Down path for the base of a PNP transistor This circuit consists of a diode connected its cathode to a positive B power supply Under normal conditions the diode is reverse biased which keeps the base of Q1 pulled up forcing it OFF However if there is a short or excessive load on the B line the diode in effect will have a LOW on its cathode turning it ON This will allow a current path for the base bias of Q1 which will turn it ON and generate a Shutdown Signal B VOLTAGE TOO HIGH In this circuit a Zener diode is connected to a voltage divider or in some cases directly to a power supply
117. lection PWB and display the Digital Convergence Cross hatch pattern Mark the center of the Digital Convergence Cross hatch Pattern with finger and press the SERVICE ONLY switch to return to normal mode Enter the 12 Bus alignment menu With Power Off press and hold the SOURCE button on the front panel then press the POWER button and Release both buttons Select Item H POSI H Adjust the data up or down slightly to match the Video to the center location found in step 10 Exit from the Menu NOTE To enter the Bus alignment menu with Power Off press the SOURCE button on the front panel and hold it down then press the POWER button and release both buttons adjustment menu will appear CHASSIS TILT RASTER INCLINATION ADJUSTMENT ADJUSTMENT PREPARATION The set can face any direction Receive the Cross Hatch Signal VIDEO CONTROLS Factory Preset SCREEN FORMAT should be NORMAL mode The lens focus should have been coarse adjusted The electrical focus should have been coarse adjusted The Digital Convergence RAM should be cleared Turn power off press and hold the SERVICE ONLY switch on the Convergence PWB then press the POWER button ADJUSTMENT PROCEDURE GREEN 1 Apply covers to the RED and BLUE lenses or short the 2P Sub Mini connector PTS on R amp B CRT PWB to produce only GREEN 2 Turn the Green deflection yoke and adjust the TILT until the green is level
118. lor not being ad justed and adjust one color at a time The ad justment order of R G and B is just an example Adjust the Focus VR for Red until maximum Focus is achieved Repeat for Blue and Green DE FOCUS ADJUSTMENT ADJ USTMENT PREPARATION Video Control Brightness 90 Contrast Max SCREEN FORMAT should be NORMAL mode PV154 923 03506 ADJUSTMENT PROCEDURE 1 2s 2 Receive any NTSC crosshatch signal Turn the B FOCUS VR fully clockwise Adjust BLUE defocus according to the following specifications 1mm on each side equaling 2mm total See figure Below WHITE BALANCE AND SUB BRIGHTNESS ADJUSTMENT ADJUSTMENT CONDITIONS Cut Off and Blue Defocus must be complete High brightness white balance Low brightness white balance Set Color Temperature to COOL on Customer s Menu ADJUSTMENT ITEMS Screen adjustment VRs on Focus Block Drive adjustment performed using Bus Align ment within Service Menu PREPARATION FOR ADJUSTMENT Start adjustment 20 minutes or more after the power is turned on Turn the brightness and black level OSD to mini mum by remote control Receive a tuner signal any channel B W would be best Set the drive adjustments for Green and Red within Service Menu to their Data Centers ADJUSTMENT PROCEDURE Sub Brightness 1 Go to ADJ Mode With power Off press and hold the SOURCE button on the front panel then press the POWER button
119. low in relationship to the actual deflection raster change The SRAM is a very fast memory So during the first application of AC power the EEPROM data is read and the SRAM makes the interpolation As long as power remains interpolation no longer has to be made This can be seen during an adjustment If the Interpo lation key is pressed on the remote control the SRAM must make those additional calculations beyond the 117 made by the Servicer and this is all placed into memory INFRARED REMOTE CONTROL INPUT The Infrared Remote control signals manipulate the in ternal data when the Service Only Switch is pressed on the Deflection PWB This process prevents the Micro processor from responding to Remote commands via a Busy line output from the DCU INTERNAL CONTROLLER D A CONVERTERS The internal controller takes the stored data and con verts it to a complex Convergence correction waveform for each color The Data is converted through the D A converter 1st and 2nd sample and hold the Low Pass Filter that smooths out the parasitic harmonic pulses from the digital circuit and the output Clamp that fixes the DC offset level PV154 923 03506 The DC offset voltage is adjusted by several things When a complete Digital Convergence procedure has been performed and the adjustment information stored in memory by pressing the MULTI button twice it is necessary to run Sensor Initialization This is done by pressing the MULTI butto
120. lowing FIRE AND SHOCK HAZARD 1 Be sure that all components are positioned to avoid a possibility of adjacent component shorts This is especially important on items trans ported to and from the repair shop 2 Verify that all protective devices such as insulators barriers covers shields strain reliefs power supply cords and other hardware have been reinstalled per the original design Be sure that the safety purpose of the polarized line plug has not been defeated 3 Soldering must be inspected to discover possible cold solder joints solder splashes or sharp solder points Be certain to remove all loose foreign particles 4 Check for physical evidence of damage or deterioration to parts and compo nents for frayed leads or damaged insulation including the AC cord and replace if necessary 5 No lead or component should touch a high current device or a resistor rated at 1 watt or more Lead tension around protruding metal surfaces must be avoided 6 Afterreassembly of the set always perform an AC leakage test on all exposed metallic parts of the cabinet the channel selector knobs antenna terminals handle and screws to be sure that set is safe to operate without danger o electrical shock DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner Connect a 1500 ohm 10 watt resistor paralleled by 15 mfd 150V AC type capacitor
121. lso some of the Microprocessors internal sub routines have variables that are stored ZP26 28 SERVICING CIRCUIT DESCRIPTIONS in the EEPROM such as the window for Closed Caption detection Data and Clock lines are SDA1 from pin 2 of the Microprocessor to pin 5 of the EEPROM and SCL2 from pin 3 of the Microprocessor to pin 6 of the EEPROM Data travels in both directions on the Data line FLEX CONVERTER UCO1 The projection television is capable of displaying NTSC as well as ATSC DTV including HD High Definition The Flex Converter is responsible for receiving any video input and converting it to 33 75 Khz output This output is controlled by sync and by the customer s menu and how it is set up The set up can be 4X3 or 16X9 for DTV or letterbox This set also has something called Through Mode This bypasses the Flex Converter completely and inputs the 10801 signal directly to the Rainforest IC The Rainforest IC then outputs the signal directly The Flex Converter can take any NTSC S In Component NTSC or Progressive Interlaced 4801 720P 10801 signal Control for the Flex Converter is Clock Data and Enable lines Clock Data and Enable lines for the Flex Converter are output from the Microprocessor at pins 45 Data and 46 FCENABLE The FCENABLE line is routed through the PFC1 connector pin 12 and the FCDATA line is routed through the PFC1 connector pin 11 The Clock line must be routed through th
122. ment needed is a video generator HV DC meter 0 to 40 KV high Z and a external variable power supply OV to 6VDC 5Amps minimum To verify the Shutdown Circuit is operating properly Supply 6V DC to pin 1 of P1407 and ground to Heat sink of Q1413 If there is no raster and set goes into Shutdown then the Shutdown Circuit is functional If the set doesn t go into Shutdown then the Circuit is defective ELECTROSTATICALLY SENSITIVE DEVICES Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electro statically Sensitive ES Devices Examples of typical ES devices are integrated circuits and some field effect transistors and semicon ductor chip components The following techniques should be used to help reduce the incidence of component damage caused by static electricity 1 Immediately before handling any semiconductor component or semiconductor equipped assembly drain off any electrostatic charge on the body by touching a known earth ground Alternatively ob tain and wear a commercially available discharging wrist strap de vice which should be removed for potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as an ESD mat to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a grounded tip s
123. ming under these conditions H BLK Horizontal and Vertical Blanking is developed within the Deflection circuit The Horizontal Blanking pulse operates around 13V P P and is produced by taking a sample pulse from the Deflection transformer T752 PV154 923 03506 V BLK The Vertical Blanking pulse is generated from the Vertical output IC I601 pin 11 This pulse normally operates at 21V P P IR The Infrared Pulses coming from the remote control are routed through the Deflection PWB to the Digital Convergence Unit During DCAM Digital Convergence Adjustment Mode the Remote Control provides manipulation pulses for the DCU DIG RGB BUSY This indicates Digital RGB and BUSY Digital RGB represents the On Screen Characters produced by the DCU for generating the Digital Convergence adjustment grid and text produced during certain conditions such as HD Focus Sen sor Initialization Data Storage etc Busy notifies the DAC1 1006 pin 1 which in turn notifies the Microprocessor I001 that the DCU has entered the DCAM During this time the Micro processor ignores the remote control commands D SIZE Digital Size is a control signal for raster enlargement when HD FOCUS is operated Raster enlargement is required for the HD FOCUS PATTERN to hit the photo sensors This signal is output from DCU and routed to the base of 0710 for enlarging horizontal size through the Pin Cushion circuit and through Q603 to the Vertical Output IC 1
124. n on the remote once then pressing the PinP Ch button This begins a preprogrammed production of different light patterns HD Focus memorizes the characteristics of the light pattern produced by the digital convergence module If a convergence touchup is required in the future the customer simply activates HD Focus via the Customer s Menu and the set begins another preprogrammed production of different light patterns This automated process that duplicates the same light pattern it memorized from the initialization process re aligns the set to the memorized convergence condition HD FOCUS SENSORS This process is a joint effort between the digital convergence module and 4 Photo sensors physically located on the middle edges of the cabinet just behind the screen The physical placement of the sensors assures that they will not produce a shadow on the screen that can be seen by the customer HD Focus is activated when the customer selects HD Focus in the Customer s Menu An on screen graphic will be displayed to confirm that the automatic conver gence mode HD Focus has begun The digital convergence module produces different patterns for each CRT and the sensors pick up the transmitted light generate a DC voltage This voltage is sent to the DCU and converted to digital data and compared with the memorized sensor initialization data Distinct patterns will be generated in each primary color As the process continues the dig
125. ntal Convergence correction Adjust the location either left or right BV is Blue Vertical Convergence correction Adjust the location either up or down BH is Blue Horizontal Convergence correction Adjust the location either left or right CONVERGENCE YOKES Each CRT has a Deflection Yoke and a Convergence Yoke assembly The Deflection manipulates the beam in ac cordance to the waveforms produced within the Hori PV154 923 03506 zontal Deflection circuit or the Vertical Deflection cir cuit The Convergence Yoke assembly manipulates the Beam in accordance with the correction waveforms pro duced by the DCU HD FOCUS MAGIC FOCUS SENSORS AND INTERFACE Each of the four photo cells called solar batteries has its own amp which develops the DC potential produced by the cells Each amp is routed through the PDS1 con nector and arrives at the PDS connector on the DCU where the DCU converts this DC voltage to Digital sig nals These digital signals are used only when HD Focus is activated via the Customer s Menu and HD Focus runs MICROPROCESSOR The Microprocessor is only involved in the Digital Con vergence circuit related to IR Infrared Remote Control Signals When the DCU is put into the Digital Conver gence Adjustment Mode DCAM or HD Focus is running the Microprocessor ignores IR pulses This is accom plished by the BUSY signal from the DCU The BUSY sig nal is routed from the DCU out the PDG connector pin 10 to
126. nu Use the UP DOWN arrow to choose from the following options Press SELECT to confirm your choice e Light Sentry Automatically monitors and adjusts contrast depending on room lighting to produce a more natural picture Also adjusts Auto Flesh Tone and Video Filter depending on signal e Auto Flesh Automatically monitors and adjusts the color to maintain constant color levels even after a program or channel changes Weak Signal Automatically reduces conspicuous noise in the picture without degrading picture quality Color Temperature Set this to Warm for hotter col ors such as red set to Cool for less intense colors with more blue or Medium for normal color ap pearance Press QUIT to save and exit Notes t may be necessary to adjust TINT for optimum picture quality when viewing component video sources Y PBPR connected to Inputs 3 4 When viewing component video sources Y PBPR connected to Inputs 3 4 if the TINT and COLOR in the picture appear to be abnormal check to be sure that the correct Component Color Type is se lected for the Picture Formats option on the Setup menu lt SETUP SPECIAL VIDEO AUDIO THEAE Bass E gt Tree A99 gt gt Balance lt L 0 Reset Advanced Settings Menu To Menu Bar To Exit Quit PV154 923 03506 1 16 PICTURE SETTINGS Press MENU and use the RIGHT LEFT arrow button to acc
127. o colors 9 Exit SERVICE by pressing the CURSOR LEFT on re mote 10 Exit SERVICE MENU by pressing the MENU key on the remote CHASSIS PRE FOCUS ADJUSTMENT ADJUSTMENT PREPARATION Pre Heat Run should be finished FOCUS ADJUSTMENT 1 Short the 2pin sub miniature connector on the CRT PWB PTS to remove any color not being adjusted and adjust one color at a time The ad justment order of R G and B is just an example PTSR for RED PTSG for GREEN and PTSB for BLUE 2 Adjust the Focus VR for Red until Focus is achieved A Fine Adjustment will be made later PV154 923 03506 3 Repeat for Blue and Green DCU CROSSHATCH PHASE ADJUSTMENT ADJUSTMENT PREPARATION Cut Off adjustment should be finished Video Control Brightness 90 Contrast Max ADJUSTMENT PROCEDURE NORMAL MODE 1 Receive any NTSC signal 2 Press the SERVICE ONLY switch on the Convergence PWB to enter DCAM mode and display DCU grid 3 Change the Remote Control into VCR mode 4 Press the key on the Remote Green Cross hatch appears 5 Change the Remote Control into TV mode 6 Press the QUIT key This is the Phase adjustment mode 7 Adjust data value using the keys indicated in the chart below until the data matches the values in dicated in the chart Saving Data Values 8 Change the Remote Control into VCR mode 9 Press the key on the Remote to exit phase mode 10 Change Remote Control into TV mode 11 Press
128. oldering iron to solder or unsolder ES devices 4 Use only an anti static solder removal device Some solder re moval devices not classified as anti static can generate electrical charges sufficient to damage ES devices PV154 923 03506 5 Do not use freon propelled chemicals These can generate electri cal charge sufficient to damage ES devices 6 Do not remove a replacement ES device from its protective pack age until immediately before you are ready to install t Most replace ment ES devices are packaged with leads electrically shorted to gether by conductive foam aluminum foil or comparable conduc tive material 7 Immediately before removing the protective material from the leads of a replacement ES device touch the protective material to the chassis or circuit assembly into which the device will be in stalled Caution Be sure no power is applied to the chassis or circuit and observe all other safety precautions 8 Minimize bodily motions when handling unpackaged replace ment ES devices Otherwise seemingly harmless motion such as the brush ing together of your clothing or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device REGULATORY INFORMATION This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection
129. ons 8 Audio BOOBE sasise Loudness PV154 923 03506 1 2 ZP26 28 OVERVIEW OVERVIEW SPECIAL FEATURES HD Monitor Digital DisplayDisplays Digital Signals at 540p or 10801 User Selects Tri lingual Menus English Spanish French Other features Icon Menus Source ID Channel La bels Parental Control with V Chip On Off Timer Flashback CC CC When Mute 2 Level Mute Channel Review Channel Skip Power Resume On Off Speaker Selection Date Time Channel Energy Star CABINET DESCRIPTION Dimensions and weight R56W28 54 1 W x 52 21 x 24 2 D R65W28 60 01 W x 62 01 H x 26 3 D Light Silver Screen Protector High Contrast Swivel Casters es Pe Casters Control Panel Escut Buttons 8 REMOTE CONTROL Transmitter Universal Remote w Glow Model Number eiie oinnes MBR5045 ON SCREEN DISPLAY RATING BROADCAST Displays the rating for the program currently being broadcast AUDIO SELECTED STEREO Displays signal s audio setting ST SAP TV PG DLSV AUDIO BROADCAST Displays signal s audio broadcast CHANNEL SKIP Shows that Channel Skip is active e M erase S SECURITY TIMER Displays time that TV is set turn off ae OFF 10 05
130. ons Press the bulls eye Select button in the center of the directional arrows to confirm selection THEATER Direct access to theater modes 4 Release the mode key Point the remote at the de vice and press the POWER key The device should turn off If not try the other 3 number codes listed NOTE Use the CABLE device button for satellite receivers Use the DVD device button for home audio components 2 Press and hold the device button until the indicator light turns on continue holding down the device button 3 Now the remote control is ready to program the code for the corresponding component Enter the product s code number using the number buttons Code num bers can be found on the following pages The indi cator light will flash three times and turn off if the code was accepted PV154 923 03506 1 5 ZP26 28 REMOTES REMOTE CONTROL REMOTE BRAND CODES TVs Daewoo 149 TV VCR Combination Codes Funai TV VCR 154 Zenith TV VCR 150 152 153 154 172 Zenith 101 121 149 152 Adventura TV VCR 154 Goldstar TV VCR 153 172 Daewoo TV VCR 148 Symphonic TV VCR 154 VCRs Admiral 261 General Electric 216 220 266 282 Oron 250 Sedis i scit 211 212 213 265 701 702 725 274 ice ack 292 717 718 719 Panasonic 245 251 259 713 720 Go Video 256 262 263 700 714 715 716 Sharp succes 261 730 Audio Dynamics 726 Goldstar 253
131. onvergence correction NOTE After entering DCAM with each press of the Service Only Switch the picture will toggle between Video mode and DCU Gnd Project only the Green raster by selecting Green Adjustment mode and pressing the MENU button ADJUSTMENT 1 Adjust using R711 Horz Size Adj VR to match marks on the Overlay See Figure Below 2 Press Power Off to exit DCAM Digital Conver gence Adjustment Mode ALTERNATE METHOD Adj Horiz Size until the size matches the chart below Screen Size 56 61 65 Screen Format NORM NORM NORM 1165 1270 1355 All Adjustments are 5mm BEAM FORM ADJUSTMENT PREPARATION FOR ADJUSTMENT IMPORTANT Screen format should be NORMAL 1 Pre Heat Cut Off Pre optical focus DCU Phase Data H Pos Course Raster Tilt Beam Alignment Raster Position Vertical and Horizontal Size ad justment should be completed 2 Brightness 90 Contrast Max 3 Input a NTSC DOT signal ADJUSTMENTS PROCEDURE 4 Green CRT beam shape adjustment 5 Short circuit 2P sub mini connectors on Red and Blue CRT PWB to project only the Green beam 6 Turn the green static focus VR fully clockwise 7 Make the dot at the screen center a true circle using the 4 Pole magnet shown in Figure 1 be ZP26 28 SERVICING SERVICE ADJUSTMENTS low 8 Also adjust the Red and Blue CRT beam shapes ac cording to the steps 1 to 3 9 Afterthe adjustment is completed
132. onversion Improved HD dramatically improves this process and produces images free rom picture artifacts by increasing both vertical and horizontal resolution True HD signals are not affected by this process leaving them as true to life as possible IMPROVED PICTURE Zenith s 26 and 28 series projection televisions feature a 52mm screen pitch improved image scaling and new 7 CRTs yielding sharper images and finer detail This represents significant improvement compared to our previous 94 95 25 series The screen also features a scratch resistant coating 3 2 PULLDOWN DETECTION Most movies are shot on film and film operates at a frame rate of 24fps frames per second compared to video which operates at 30fps 3 2 pulldown properly detects and syncs film to video for smooth theater like pictures at home ZP26 28 OVERVIEW OVERVIEW R50 60V26 SPECIFICATIONS REMOTE CONTROL VIDEO Transmitter Universal Remote w Glow Channel amp Vol Picture TUDES ere eue aeter 7 LFM Resolution Display csscssssesscsseesee 540p or 1080i Model Numbet 5045 S dei es 1st Surface Glass APPROVALS Lens Enhanced HD UL C UL NOM UL CUL Tuning System NTSC Up Converter UPC Code onec rides 50 04464200642 6 Scan Velocity Modulation Advanced SVM 60 04464200632 7 Dynamic SERVICE L
133. plied to pin 5 and this switch ing allows EMF to develop As this signal collapses it creates a pulse on the output pin of T751 at pin 4 to the base of the Deflection Horizontal output transis tor Q777 Two transistors monitor the SW 9V line 0707 and 0708 When the set is turned off the H Drive signal from 1001 could stop too soon If this were to happen the Horizontal output transistor Q777 would be damaged To prevent this if the SW 9V line drops 0707 senses this because its base voltage drops The base of 0708 rises and turns on grounding the output from the H Drive Transistor Q709 Q709 transistor switches the primary windings of the Deflection Transformer T752 T702 TRANSFORMER PRODUCES THE FOLLOWING OUT PUT PULSES e Deflection Pulse from pin 7 This pulse is used by 1 X Ray Protect through D707 This signal is monitored by the X Ray Protect circuit to place the power supply into shut down if the Deflec tion circuit doesn t operate 2 The Dynamic Focus OUT Circuit PWB through PDK4 connector pin 5 A Dynamic Focus wave form Horz Parabola is created This is a para bolic waveform that is superimposed upon the static focus voltage to compensate for beam shape abnormalities which occur on the out side edges of the screen because the beam has to travel further to those locations 3 1100V Generation circuit through D711 D712 and the connector PDF1 pin 1 PV154 923 03506 3 8 This is
134. re Outside Picture POP 3 Split Screen Digital Display Color Cool Warm STD Displays Digital Signals at 540p 1080i User Selects Black Level Exp White Level Compression NTSC Fixed Home Theater Mode TV Movie Sports Music Reset Tri lingual Menus English Spanish French 0ther features Menus Source ID Channel 1 Comb y Sa Digital 3D Y C bels Parental Control with V Horizontal Lines 1200 Chip On Off Timer Flashback CC Picture In Picture PIP 2 Tuner CC When Mute 2 Level Mute Aspect Ratio Normal Wide Panoramic Zoom Channel Review Channel Skip Power Resume On Off Speaker Se lection Date Time Channel Advanced features Light Sentry Detail Enhance Su per Contrast Gamma Cor rection Auto Flesh Tone CABINET Wide Band Video Amp Dimensions and weight AUDIO R50V26 43 5 w x 52 x 23 5 d 177Lbs Front Surround SRS csse Yes R60V26 51 5 w x 60 5 h 26 5 d 9226Lbs Mono Stereo MTS SAP MTS SAP Light Silver Bass Treble Balance Tone Control Yes Screen Protector High Contrast Total Audio Watts 24W 2 x 12W SWIVEL CIS Casters EET Yes Control Panel Escut Butt
135. re as well as the source for the PinP or Sub picture Communication from the Mi croprocessor via pins 2 SDA1 and 3 SCL1 to the PST1 connector pins 5 and 4 respectively then to IX01 pins 34 and 33 respectively SUB VIDEO CHROMA IX03 The Sub Video Chroma IC processes the video and chroma for the Sub or PinP picture It converts Luminance into Y and Chroma into Cr Cb NTSC Only Communication from the Microprocessor via pins 59 SDA2 and 60 SCL2 to connector PST1 pins 8 and 7 to IX03 pins 34 and 33 respectively MAIN Y PR PB SELECTOR IX04 Any input that is not already in the Y Pr Pb or Y Cr Cb state will have be converted to this state by 1501 The Main Y Pr Pb Selector IC selects the appropriate input between the Tuner AV Inputs S Inputs or Com ponents Communication from the Microprocessor via pins 59 SDA2 and 60 SCL2 to connector PST1 pins 8 and 7 to IX04 pins 31 and 30 respectively SUB Y PR PB SELECTOR 1X04 Any Sub input that is not already in the Y Pr Pb or Y Cr Cb state will have be converted to this state by IX03 The Sub Y Pr Pb Selector IC selects the appropriate in put between the Tuner AV Inputs S Inputs or Compo nents Communication from the Microprocessor via pins 59 SDA2 and 60 SCL2 to connector PST1 pins 8 and 7 to IX05 pins 31 and 30 respectively FRONT AUDIO CONTROL IC 1 Audio control is performed by this IC Selection for dif ferent Audio modes volume bass tr
136. red RED 2 DP23 Indicating 115V Deflection is available Colored GREEN 3 DP37 Indicating SW 5 B is available Colored GREEN 4 DP11 Indicating SW 9 is available Colored GREEN 5 DP35 Indicating 28V is available Colored GREEN PV154 923 03506 3 6 LED USAGE The Visual LEDs are useful in Trouble Shooting Without removing the back cover some diagnostics can be made By observing the operation of the Red and Green LEDs the technician can determine if the Deflection Power Supply is running By monitoring these LEDs at turn on one can determine if a line is loaded If an LED tries to light then goes off or only lights dimly a loaded condition should be considered Remember this power supply doesn t operate when the set is in Standby The following will examine each LED and how they are lit DPO6 Indicating Vcc applied to the Power Supply Driver IC IPO1 pin 4 Colored RED If Vcc is present on the Deflection Power Supply Driver IC LED will be ON DP23 Indicating 115V Deflection is available Colored GREEN This LED is connected directly to the 115 V deflection B line If it s lit 115V is available DP37 Indicating SW 5V B is available Colored GREEN This LED is connected directly to the SW 5V B line If it s lit 5V is available DP11 Indicating SW 9V B is available Colored GREEN This LED is connected directly to the SW 9V B line If it s lit 9V is availa
137. reen and Blue is to the right of Green as indicated below o All Vertical positions are geometric center of screen Parameters are 2mm RED OFFSET LEFT BLUE OFFSET MODEE OF CENTER RIGHT OF CENTER ASPECT VERTICAL SIZE ADJUSTMENT VERTICAL SIZE Receive an NTSC signal Video Control should be set to Factory Preset condition Convergence should not be corrected ADJUSTMENT PROCEDURE 1 With Power Off press and hold the Service Only Switch on the Convergence PWB then press the Power Button and Release Digital Convergence data is cleared Then release the Service Only Switch DCU Grid appears 2 Adjust using R607 Vertical Size Adj VR to match marks on the Overlay See Figure Below 3 Turn Power Off NOTE Centering magnet may be moved to facilitate Distance is important not centering ALTERNATE METHOD Adjust Vertical Size until the size matches the chart below PV154 923 03506 ALTERNATE METHOD Adj Vert Size until the size matches the chart below Scrn Size 56 61 65 Scrn Format NORM NORM NORM L 590 645 690 All Adjustments are 5mm HORIZONTAL SIZE ADJUSTMENT PREPARATION FOR ADJUSTMENT Display Mode NORMAL Install the correct Overlay Input an NTSC Signal Digital Convergence RAM should be cleared With Power Off press the Service Only switch on the Convergence PWB While holding the Service Only Switch down press the Power On button and Release DCU Grid will appear without c
138. rks of Dolby Laborato ries Confidential Unpublished Works 1992 1997 Dolby Laborato ries Inc All rights reserved VCR Plus PlusCode and GUIDE Plus are trademarks of Gemstar Development Corporation The VCR Plus and GUIDE Plus systems are manufactured under license from Gemstar Development Corpora tion and VCR Index Systems B V respectively Gemstar is not in any way liable for the accuracy of the program schedule information provided by the GUIDE Plus system In no event shall Gemstar be liable for any amounts representing loss of profits loss of business or indirect special or consequential dam ages in connection with the provision or use of any informaion equipment or services relating to the GUIDE plus system SRS and the symbol are trademarks of SRS labs Inc SRS technology is incorporated under license from SRS Labs Inc Licensed by BBE Sound Inc under USP4638258 and 4482866 BBE and the symbol are registered trademarks of BBE Sound Inc ZP26 28 SAFETY PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO VIDEO PRODUCTS HOLD DOWN CIRCUIT INFORMATION NORMAL CONDITION In normal condition the DC voltage at point is ap proximately 4 88V through pin 1 of P1407 HV Block The voltage at point B is approximately 4 86V The voltage of pin 5 of 10404 is lower than the voltage of pin 6 5 1V The voltage of pin 7 is and the transis tor Q403 is off ABNORMAL CONDITION In abnormal condition the
139. ross the emitter base junction of 0 02 to the SW 11V supply This increase of current flow through RNO8 will bias on QNO2 and the events described in Spot Circuit Activation above will occur Loss of Horizontal Blanking H Blk The Horizontal pulse at the base of QNO1 switches QNO1 on and off at the horizontal rate This discharges 02 sufficiently to prevent the base of from going high to turn it on and activate QNO2 When the 11 6 Vp p positive horizontal blanking pulse is missing from the base of it will be turned off which will cause the collector to go high through RNO2 and SW 11V as CNO2 charges This in turn will cause to turn on because its base is pulled up high when DNO2 fires When turns on an increase of current flow from emitter to collector through RNO7 and up through RNO8 This increase of current flow through RNO8 will bias on QNO2 and the events de scribed in Spot Circuit Activation above will occur The Digital Convergence circuit is responsible for main taining proper convergence of all three colors being produced by the CRTs Many different abnormalities can be quickly corrected by running HD FOCUS The Digital convergence Interconnect Diagram depicts how the Digital Convergence Circuit is interfaced with the rest of the Projection s circuits The main compo nents and or circuits are e THE DIGITAL CONVERGENCE UNIT DCU INFRARED REMOTE RECEIVER
140. rter 1301 1006 DAC3 1007 Level Shift I004 3D Y C 1301 Main Video Chroma 1501 Rainforest ICO1 ON THE TERMINAL PWB A V Selector IX01 Sub Video Chroma IX03 Main Y Pr Pb Selector IX04 Sub Y Pr Pb Selector IX05 ON THE SURROUND PWB Front Audio Control IA01 DATA COMMUNICATION The following explanations deal with the communication paths used between the Microprocessor and the respective ICs ON THE SIGNAL PWB Main Tuner U501 with MTS outputs The Microprocessor controls the Main Tuner by SDA Data and SCL Clock PC communication lines SCL1 and SDA1 lines for the Main Tuner are output from the Microprocessor at pins 2 SDA1 and 3 SCL1 respectively These lines go directly to the Main Tuner SDA1 at pin 5 and SCL1 at pin 4 These lines control band switching programmable divider set up information pulse swallow tuning selection etc PINP TUNER U502 The Microprocessor controls the Main Tuner by SDA Data and SCL Clock 12 communication lines SCL1 and SDA1 lines for the Main Tuner are output from the Microprocessor at pins 2 SDA1 and 3 SCL1 respectively These lines go directly to the Main Tuner SDA1 at pin 5 and SCL1 at pin 4 These lines control band switching programmable divider set up information pulse swallow tuning selection EEPROM 1003 The EEPROM is ROM for many different functions of the Microprocessor Channel Scan or Memory List Customer set ups for Video Audio Surround are memorized as well A
141. se Q 5 MOLEX5289 3P 1 1 5 SURGE 25 SURGE O u SURGE I T v o CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL AN N REPLACE ONLY WITH PART NUMBERS SPECIFIED 6 9 NOTE WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC 7 26 28 SHEET 9 CHANNEL 5 AND NSTC COLOR BARS Signal Circuit 4 4 1 2 3 4 5 6 7 8 RJ10 470 RJ13 V RJ19 S mue puos FRONT AUDIO Rue issisa 14 PL o 02062 0 MINISP v RJO1 4 1551334 Z i x CJ01 1 502 2K CJO4 1 50 LJO2 GND ui g 2200 35 FB 0 5 CJO2 1 50 RJO2 CJ05 1 50 TX FL WO OUT 140 gr Bei TET TS REG ta T m DJe2 A 1415 n 158133 RJ03 1k jf SE 09 S 278 Pl S sH SS QOO don 409 DJO1 aJ 5 m 2 FL 188133 2502114 9 Ne o ERRMUTI gt u FSPOFF 1k 6 02 VMUTE2 gt 0 02 ene T EL PR T 188133 47K pr 4 1 RJO7 47k PA
142. the Dynamic Focus output voltage 28V 26V and RETRACE PULSE 28V and 28V The 28V and the 28V are routed to the Deflection trans former T752 They enter the transformer as a pure DC voltage then a 7 5V P P horizontal pulse is added to the DC voltage and leave as 28 and M28P From here these voltages are routed to the Convergence output section and they are rectified They become 33V and 33V respectively This process prevents the need for another power supply Note the M stands for Minus voltage H BLK GENERATED FROM PIN 7 The Horizontal Pulse is also routed to the Horizontal Blanking generation transistor Q706 This transistor generates the 13V P P called H Blk This signal goes to the following circuits To pin the PSD2 connector pin 7 to pin 24 of 1001 as FBP In Here this signal is used as a comparison signal It is compared to the reference signal com ing in at pin 15 Horizontal Sync If there are any differences between these two signals the output Drive signal from pin 26 is corrected NOTE When a 10801 signal is input through component inputs the Rainforest IC detects this as well and outputs the Vertical Squeeze V Squ signal from pin 36 The Reference signal for Horizontal Sync now becomes the Y input from component pin 8 To the Convergence circuit for correction waveform generation Sweep Loss Circuit QNO1 to shut off the CRTs if Horizontal deflection is lost Through the connector P
143. the PDK1 connector pin 1 then the PSD1 con nector pin 1 to the 1006 pin 1 Through I C data communications SCL1 and SDA1 the IC tell the microprocessor that the DCU is busy RAINFOREST IC Video Processor The Rainforest IC 01 is only involved with the Digital Convergence circuit related to the OSD path SERVICE ONLY SWITCH The Service Only Switch is located just in front of the Digital Convergence Module on the Convergence PWB If the front speaker grill is removed and the front ac cess panel is opened the switch will be on the far left hand side When this button is pressed with the TV ON the DCU enters the DCAM Digital Convergence Adjust ment Mode If the button is pressed and held down with the TV OFF and the power button is pressed and released the Digi tal Convergence RAM is cleared Then by releasing the Service Only Switch the DCU Grid appears In the Cleared RAM state there is no influence from the DCU related to beam deflection Magnetic centering Red and Blue cen ter offset and other adjustments requiring no influence from the DCU are performed in this mode as well as the ability to enter the 3X3 9 adjustment points mode ABL VOLTAGE OPERATION The ABL voltage is generated from the ABL pin 3 of the Flyback transformer THO1 The ABL pull up resistors are RH27 and RH28 They receive their pull up voltage from the 115V2 line for Deflection generated from the Power Supply vi
144. the antenna block into Antenna A or 5 Ant Antenna B when selected In Service Mode if Set Up is selected outputs High to collapse Vertical circuit and inhibit Vert Sweep 6 Cut Off Loss Detection 7 Magic Sw Places the Unit into HD Focus Mode 8 Gnd Ground During HD Focus and Sensor Initialize the H and V Size has to be increased slightly for Sensor striking 9 D Size purposes Receives the Low from the Main Tuner indicating SAP 10 SAP Det signal received 11 Ground Not Used 12 Gnd Ground Not Used 13 5 5 Standby 5 Volt input 14 SDA1 Serial Data from Microprocessor 15 5011 Serial Clock from Microprocessor 16 SBY 45V Vcc SBY 5V NOTE Pin 1 Busy and Pin 9 D Size works as a tri data level input The Digital Convergence Module is active during Service Adjustment DCAM HD Focus and or Sensor Initialize LEVEL SHIFT I004 The Microprocessor operates at 3 3Vdc Most of the Cir cuits controlled by the Microprocessor operate at 5Vdc The Level Shift IC steps up the DC voltage to accommo date e Pin 4 outputs a Clock used by the Flex Converter e Pin 11 outputs Error Mute signal ERRMUTE used to mute the Out to Hi Fi jacks on the SRS PWB e 13 outputs a Front Speaker Off signal FSPOFF used to turn off the internal speakers 3D Y C 1301 IC mounted directly on the Signal PWB The 3D Y C IC is a Luminance Chrominance separator as well as a 3D adder Separation takes place digitally Us ing advance
145. the base of the transistor the transistor will conduct producing a Shutdown signal that is directed to the appropriate circuit VOLTAGE LOSS OR EXCESSIVE LOAD DETECTION The second most common circuit used is the Voltage Loss Detection circuit This is a very simple circuit that detects a loss of a particular power supply and supplies a Pull Down path for the base of a PNP transistor This circuit consist of a diode connected by its cathode to a positive power supply Under normal conditions the diode is reversed biases which keeps the base of Q1 pulled up forcing it OFF However if there is a short or excessive load on the line the diode in effect will have a LOW on its cathode turning it ON This will allow a current path for the base bias of Q1 which will turn it ON and generates a Shutdown Signal VOLTAGE TOO HIGH DETECTION In this circuit a Zener diode is connected to a voltage divider or in some cases directly to a power supply If the voltage increases the voltage at the voltage divider or the cathode of the zener diode will rise If it gets to a predetermined level the zener will fire This action creates a Shutdown Signal NEGATIVE VOLTAGE LOSS DETECTION The purpose of the Negative Voltage Loss detection circuit is to compare the negative voltage with its counter part positive voltage If at any time the negative voltage drops or disappears the circuit will produce a Shutdown signal There
146. tion reproduction of the original performance SRS and the symbol are trademarks of SRS labs Inc SRS technology is incorporated under license from SRS Labs Inc 9 Licensed by BBE Sound Inc under USP4638258 and 4482866 BBE and the symbol are registered trademarks of BBE Sound Inc PV154 923 03506 POP 3 POP 3 Channels Main Picture POP 3 Picture On Picture shows multiple channels on the screen With the TV on and Ant 1 source shown on screen press MULTI on the remote to turn on the POP 3 feature POP 3 shows three additional channels on the right side of the screen The multi channel display also includes the channel number for reference POP 3 will continue to display all the channels continuously three channels at a time Press MULTI again to turn POP 3 off POP 3 is only available on Antenna Cable 1 source Closed Captioning will not appear if POP 3 is active SPLIT SCREEN Original Channel Additional Channel Split Screen shows two live tunable channels on the screen at the same time With the TV on and Ant 1 source shown on screen press SPLIT on the remote to turn on the Split Screen two channel viewing feature Press PIP CH to switch channel tuning to the additional channel Tune to a channel for the additional channel picture Press PIP CH to switch channel tuning back to the original channel Press SPLIT again to turn the feature off and return to one channel viewing Split Screen is only
147. ugh the in ternal Switch MOS FET the voltage will rise Pin 5 has an internal Over Voltage detection op amp If this voltage rises enough to trigger this op amp the IC will stop producing a drive signal COLD GROUND SIDE SHUT DOWN CIRCUITS These Circuits are broken down into the appropriate categories as described earlier VOLTAGE LOSS DETECTION 1 Shorted 220V DP24 and DP25 Inverted by then through DP28 2 Shorted SW 35V DP26 Inverted by then through DP28 3 Shorted 28V DP27 Inverted by then through DP28 4 Shorted Deflection Transformer or Miss operation D707 and Q705 then through D705 NEGATIVE VOLTAGE LOSS DETECTION 5 28V Loss Detection RP21 RP20 DP35 DP21 and DP22 EXCESSIVE CURRENT DETECTION 6 115V Deflection Power Supply RP24 0 02 DP18 DP19 and DP20 7 28V Vertical IC I601 Power Supply R629 Q609 D608 and DP31 VOLTAGE TOO HIGH DETECTION 8 Excessive High Voltage Detection DH17 DH13 and DH15 Sensed from the 50P Voltage generated from pin 5 of the Flyback Transformer Also DH14 sends a high command to the Horizontal Driver IC 01 pin 7 to defeat Horizontal Drive Output if this voltage goes too high 9 Side Pincushion failure generating a High D702 and D703 PV154 923 03506 10 Deflection Too High DP17 RP26 and RP27 11 SW 9V Voltage Too High Detection DP29 and DP30 12 ABL Voltage Too High Detection DH15 If
148. uitry comprise a closed loop regulation system Unlike previous Pulse Width Modulated PWM Switch Mode power supplies the regulation system in this chassis utilizes Frequency Control Modulation with an operational frequency of 60KHZ to 85KHZ corresponding to full load and no load conditions respectively Primary regulation is provided by IPO2 and into IPO1 regulating the switching frequency at pin 3 of 1901 via pin 1 Two voltages are developed that are needed to sustain run and maintain regulation 1 Run Voltage generated from pin 8 and 9 of TP91 rectified by DPO2 and supplies run voltage to IP01 pin 4 2 115V Deflection Voltage generated from pin 11 of TP91 rectified by DP15 and used for regula tion and powering the Deflection and regulation circuitry DEFLECTION GENERAL INFORMATION The deflection circuit differs from conventional projec tion products It utilizes two horizontal output cir cuits One for Deflection and one for High Voltage There are many terms around the Horizontal circuit that are not shown on the Diagram Some of these terms are CUT OFF Cut off collapses the Vertical circuit during Bus alignments during CRT Set Up ABL ABL voltage is generated by monitoring the current through the Flyback transformer This voltage will fluctuate down when the scene is bright and up when the scene is dark The ABL voltage will manipulate the screen brightness and contrast to prevent bloo
149. way from pin 53 of the Rainforest IC ICO1 Internally this reduces the contrast and brightness voltage which is being controlled by the I C bus data communication from the Microprocessor arriving at pins 30 and 31 of the Rainforest IC and reduces the overall brightness preventing blooming as well as reducing the Color saturation level to prevent color smear MAIN MICROPROCESSOR OVERVIEW The Microprocessor must keep communication with the Chassis to maintain control over the individual circuits Some of the circuits must return information as well so the Microprocessor will know how to respond to different requests The Microprocessor uses a combination of Bus communication and the Serial Data Clock and Load lines for control The communication scheme only requires 2 lines for control These lines are called SDA and SCL Serial Data and Serial Clock respectively The Microprocessor also requires the use of what are called Fan Out IC or DACs Digital to Analog Converters This allows the Microprocessor to use only two lines to control many different circuits Also due to the fact that this Microprocessor operates at the new 3 3Vdc voltage it requires a Level Shift IC to bring up the DC level of the control lines to make it compatible with the connected ICs PV154 923 03506 3 12 The Microprocessor communicates with the following ICs ON THE SIGNAL PWB Main Tuner U501 PinP Tuner U502 EEPROM I002 Flex Conve
150. zenith SERVICE MANUAL Product Type Digital Rear Projection R50V26 Chassis ZP26 28 R56W28 Manual Series PV154 R60V26 Manual Part 923 03506 Model Line E Product Year 2002 Model Series CONTENTS General Info Service Menu Servicing Part List Diagrams PCB Layouts Schematics Published August 2002 by Technical Publications Zenith Electronics Corporation 201 James Record Road Huntsville Alabama 35824 1513 Copyright 2002 by Zenith Electronics Corporation Printed in U S A PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO VIDEO PRODUCTS IMPORTANT SAFETY NOTICE This manual was prepared for use only by properly trained audio video service technicians When servicing this product under no circumstances should the original design be modified or altered without permission from Zenith Electronics Corporation components should be replaced only with types identical to those in the original circuit and their physical location wiring and lead dress must conform to original layout upon completion of repairs Special components are also used to prevent x radiation shock and fire hazard These components are indicated by the letter x included in their component designators and are required to maintain safe performance No deviations are allowed without prior approval by Zenith Electronics Corporation Circuit diagrams may occasionally differ

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