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Service Manual - Michael Jay Lissner

1. gt n N n 5 9911 1906 A 901 280584 73C253 513 T 4746 250 NR901 80C995 1 N1 D919 L905 S F901 7 A FB903 BYV26C 73A174 7 83G 28901 6 73 25818110 0916 8977 8 2 4 250 1901 BEAD BEAD HE 1 6 mus 200K 1 2W 5 x N 33 250V x ATs 9 i C930 R950 co d 8 3 293 5 lsc BS 5 lt gt U 15 220P 2KV o 55 5 T G2 r 77 80901 220uF 400V or150uF 4 Qy 3 5 ins 3N3 250V 2 U4KBBOR 515 11 C945 D991 i BEAD 3C258 181 10H Jumper Q912 3K3 2369 Q910 pier E RY901 10 gt 100UF 100V 220K 1 2W C941 1 980 BDRV 1 3 0918 3 2 T ely 0901 5 31DF4 0 01 250V pos 220 1 4
2. 5 Input Video Signal Timing Timing116 Timing119 Timing 127 Timing 129 Timing 139 Resolution 640 480 640 480 800 600 800 600 1024 768 H KHz 31 347 43 269 46 875 530 000 60 023 V Hz 60 85 008 75 000 85 000 75 029 Timing Timing140 Timing 148 Timing 156 Timing179 Resolution 1024 768 1280 1024 1600 1200 640 480 H KHz 690 000 79 976 750 000 31 469 V Hz 85 000 75 025 600 000 70 086 6 Display Size Default 352 mm H x264 mm V Full scan 352 mm H x264 mm V 7 Scanning Frequencies Horizontal 30KHz 86KHz Vertical 50 Hz 160 Hz 8 Factory Preset Timings 9 User Timings 10 9 Misconvergence A Zone 0 25 mm Max B Zone 0 35 mm Max 3 90 4 onfidential Do Not Copy ViewSonic Corporation 10 11 12 13 14 15 Video Bandwidth 210 MHz Power Source Switching Mode Power Supply AC 90 264V 50 60Hz Universal Operating Temperature 0 C to 40 Ambient Humidity 5 to 95 Relative Non Condensing Dimensions Weight 18 0 kgs 39 7 lbs Net 21 2 kgs 46 7 lbs Gross Machine Package Width 445 mm 17 6 inches 540 mm Height 424 mm 16 7 inches 378 mm 14 9 inches w o base 530 mm Depth 465 mm 18 3 inches 570mm 16 17 18 External Connection 15 Pin D sub Connector AC Power Cord Power
3. 000407 5 2 22222 2 gt gt gt 0808 7412 0002758 dt lt gt 3t 35 36 3 gt gt gt gt lt gt lt gt N A ViewSonic WIRE MOUNT FBT CLIP STEEL ogo OWER KNOB ENS KEY PAD OSD KNOB S W CAP BASE FRONT PANEL BACK COVER SWIVEL CRT WARNING LABEL H V LABEL MANUAL P N LABEL ARTON LABEL D LABEL QUICK SET UP GUIDE CARTON EPS CUSHION EPS CUSHION PE BAG FOR MONITOR PE BAG FOR MANUAL EPE COVER ABLE TIE LASTIC TIE ABLE TIE LICON APE MIDDLE TAPE FOR CARTON BIG TAPE SMALL TAPE CD MANUAL CORE HIELD SHIELD SHIELD SIGNAL CABLE POWER 4 POWER CORD 4G WIRE HARNESS REW CREW 4X7 FOR AC CREW OPPER ASS Y DEGAUSSING COIL MAIN BOARD CRT BAORD SCREW PCB SUPPORT GND LUG ear Bracket HASSIS LABEL OLDER BAR ERRITE CORE 12 25 15 CREW CREW 4X7 FOR AC CREW CREW M3x8 C601 ASS Y D408 0403 ASS Y Q901 ASS Y Q420 ASS Y NR901 ASS Y CN901 ASS Y F901 ASS Y Description HASSIS FOR P985D 1VSC 4MI CHASSIS FOR B985D 1VSC 4G SCREW FOR CRT RUBBER WASHER C d oui a 26 Corporation Confidential Do Not Copy G Region Universal number Q t 9 4 ViewSonic P N Description Universal number Q t TOT ASSY SWITCH TSVB 2 T NP
4. 602 1 CI TACT SWITCH TSVB 2 ENP 75 TACT SWITCH TSVB 2 T NP HIC 691 CI TACT SWITCH TSVB 2 ENP 77 TACT SWITCH TSVB 2 T NP 78 WIRE HARNESS 79 WIRE E 00004072 4KB80R 81 2 82 3nE2KV 5 83 800PF IKV 84 TUF 5 250V 2 85 0 4 5 97 N lt lt lt lt lt Z Z lt gt gt gt gt gt gt gt gt 2121212 gt gt gt gt 3t 3 gt gt 85 64 1001225 59 4 596 100V C422 86 63 21012442 24uF 250V C423 87 63 21012443 24uF 400V C425 88 63C210J2725CC 2700PF IKV C426 89 63C21071052CC 1 00 250V C427 63 21015642 0 56UF 250V C428 92 93 94 55 212 21 gt gt gt gt 91 N A 0 0 0 0 6361025766 MP 12nE LGKV 1 577 67C21547012H 4706 20 250V HERMEI SOPF 2 SOPF2KV 000 UF 20 16 DUF 300VAC TUR275V 0004073 20UF 400V 0 3t 8535 20202020202 gt gt gt gt gt gt 700UF 16V 10000 2KV 470 20 1607 LOW E SD 220 250 002738 000 20 100V 70UF 16V 1000 UF 20 16V 1000 UF 20 16V 67 3054114 4700 20 25V 2200 CS13 E2GA332MYNS CS13 E2GA332MYNS 33C38033 WAFER EH E 31DF4 FC FERRITE BEAD 10 6 0 0 6 FERRIRE CORE 28 5 17 5 ORD PRING PIEC
5. 47UFISOV UF4004 0 010 600 51K 1W 56K 1 2W R608 L 6606 12501 R747 0 68R 2W 1000UF 16V 56 584 R609 Q742 Jumper R749 TDA4868A gt 270 7 57A493 12 T 62K 1 4W ew 4R7 1 4W BF420 f VOUT1 7 LTD C741 R751 6 8K C743 R601 s 0 63V m 10UF 50V 470 R611 OP VOUT2 12R P 1000PF 63V 0 61 e Vi C610 R603 o 8606 470 2 0 1UF 100V 3 0 120 H DY 11 92V 1 2W 4 R604 2K P402 12 5V R607 NR6013 607 R610 45 C410 6412 11 2W NTCR 47 2 1500P 63V D701 L C603 BAV2 470uF 16V 0 JUMPER FB404 D405 1N5817 T402 T401 Q403 FB401 790793 1 LB EHT 80V BU2527 T Fi o 426 0414 R428 C401 2 F2 42 alt 1162 680 2W 4 0 22UF 100V Q519W o q1UF 210417 d cats 118 9 ge 8402 0 47UF 100V 4300P 1 6KV Lost RAM BSN254A 386 1 4W D406 C710 R721 R726 47R 14K 1 4W 0402 i FB402 7 lt gt 0 01UF 1007 1K 1 2W 7 5 1 4W 2080 Q404 R429 BYV26C D408 71 55 29 J 2502120 1 2w DMV1500M 4 0706 HDRV C494 D450 R423 93A220 505 28403 8 RR 575 C718 Q401 0 10 50V 1 4148 20K D407 JUMPER R723 z 2uF 280V 2369 BYV26C C419 a o 5 22 2W d lt 11800 630 10 HD Lora 186 1 50408 1200PF 1 6KV R480 14 470R 1 2W SPARK GAP RY401 4 450 134148 C480 Q743 0476 ig L C426 JUMPER R459 57 446 500 ER a 2700PF 1KV MP 1 2W 2801213 jos D Q412 L R463 25201 8446 C945 2M 1 4W R750 93A39 516 52T us
6. S S S S S I S NPR WLW RH 9 2 00 32 ViewSonic Corporation Confidential Do Not Copy E90fB 4 ViewSonic P N Q t TUF 20 100 0000PF 20 18 2KV TUF 20 100 0827 0085 ILTER M FT 0827 0085 FILTER M FT 0827 0085 FILTER N A FERRITE BEAD 10 6 0 0 8 BRASS PIN BRASS PIN 401 4019 LM1246DKA NA NOPB FERRITE BEAD FERRITE BEAD FERRITE BEAD CORE RF BEAD RH 3 5X6X0 WAFER WAFER amp PLUG MOFR 0 680HM 5 1W 002759 BRASS RPC BOARD 04 4629 100PF 5 NPO 50V 404 4629 0 1UF 5 63V 04 4629 404 4629 xx DEREN xl 65 450104 7 aes 64C1767104 _________ xc xl po xq C xx 2 x xaLU xe 3t 35 2121212 gt gt gt gt yon WINININININ 2 2222 2 gt gt gt gt gt gt m a c BR Oo 3k dE 2222222 gt gt gt gt gt gt gt N c vespere Dn RIA e Q cat at S zz gt gt Q gt Q eo as z s z z gt gt gt gt gt gt 65 444101 5 100 10 50V Y5P LUF 20 100 0 1UF 5 63V 0 1UF 5 63V 03
7. TE HBlank 512 Byte RAM 512 Byte ROM irum Beam Limiter H H amp V Blanking Compatible d Buffe Analog Blue Red z ital H 10 ital V Flyback es ND V V V GND Filter V rs Hi Bias to All Blocks 12801 LMI246DKA 901 TEA1507P 43 ViewSonic Corporation Confidential Do Not Copy E90fB 4 1507 GreenChip Il SMPS control IC BLOCK DIAGRAM youg 401231054 M3MO cii 3EW 100 15 NC 1231C 4 JRL NO ANINDAN HOLYTIOSO CHTYIOHINCO 1N 38 3ENNVR 1 5 2000 Dec 05 onfidential Do Not Copy E90fB 4 44 ViewSonic Corporation 802 2476 INC1 OUTC1 INC2 OUTC2 INC3 OUTC3 4 5 ViewSonic Corporation Confidential Do Not Copy E90fB 4 10 Schematic Diagrams 985 1 StandBy UNLOCK R166 4K7 i R447 JUMPER vs L 201037 130 2V 1000 DSCL ZD104 6 2 DSDA ZD105 GND 6 2V Sens 25 1213 0906 H803 E CONS 0 100U 16V ISCL ii 220U 16V GND J061 R139 JUMP 100 J062 NC 01 1 250107 ISCL 4 388V ISDA 4 253V 4 0 04 6
8. ROTA 2 282V H LIN 4 42V Unlock 0 202V CLAMP 0 284V 51 4 747 102 56 1133 508 vec 8 4 943V A1 WP 4 93V 52 4 747 11 0 284V 12 standb 329057 13 2 ISCL 4 412V 4 4 286 4 ISDA 24 08 6 CR 4 910V 14 VSSE 15 3 947 16 C113 6 4 JI 100UF 16V R705 150 1 4W ViewSonic Corporation C104 c C103 100UF 16V 0 1UF 100UF 16 V5V 4 947 17 VSSD 18 BDRV 0 705V 19 HBGND 20 HDRV 0 535V 21 HFB 0 793V 22 46 XRAY 0 974V 23 RST 0 252V 24 Vfocus 3 043V Deguss 0 4043V HD 0 23V 1000UF KEY2 4 801V 2183 27 inter eo 2K4 8127 5 6 lt SW104 gt onfidential Do Not Copy KEY1 4 802 SwiChoic CS3 2 431V DSDA 4 936V DSCL 4 94V Vs 0 042V Hs 0 35V EEP W R 4 93V Pro 4 134V VsOUT 0 144V REM NC XTAL2 1 355V XTAL1 1 353V MODE VDDA 3 283V Vssa 0 057 1 392V Bin 2 173V Bsens 0 846V AGND Vref 2 519V 2 527V 3 159V VOUT2 0 925V VUOT1 0 927V EHT 2 57V DouColor Uvolt 5 55
9. SAA4849 P2 7 29 28 2 0 ADC1 UVOLT 30 27 P2 5 ADC2 P2 2 DAC2 31 26 2 1 DAC1 EHT 32 33 25 P0 4 VOUT2 34 24 VFOCUS EWDRV 35 23 RET IREF 36 VREF 37 22 XRAY AGND 38 21 HFB BSENSE 39 EIN do 20 HDRV BOP 41 NIMM 19 HBGND VDDA 43 18 BDRV MODE 44 Mode Regulator 17 VSSD Dig Supply 16 10 2 45 VDDD XTAL1 45 al Sync 14 VSSE detector 13 P0 7 XTAL2 46 12600 47 11 P0 1 10 P0 2 P2 4 ADCO 48 09 P0 3 P1 5 T1 PW 1 08 CLBL VSOUT SOUT 4 07 HUNLOCK gt 06 P2 3 DAC3 HSYNC 52 05 P2 6 DAC4 HSOUT ___ 04 P1 2 INTO 03 P1 4 02 P1 3 01 P1 0 VSYNC 53 Vsync i p P1 6 DDC CL 54 P1 7 DDA DA 55 P1 1 TO 56 40 ViewSonic Corporation onfidential Do Not Copy E90fB 4 102 M24C08 BN6 601 2 6 3 TDA4863AJ FLYBACK AMPLITIER gt 5 l THERMAL 4 1 ViewSonic Corporation onfidential Do Not Copy E90fB 4 ViewSonic Corporation IC801 LM1246DKA H FLY CLAMP 42 24 23 22 21 20 19 18 17 16 15 14 13 onfidential Do Not Copy E90fB 4 Flyback Clamp ABL ae Lr o p DAC 1 DAC2 DAC3 rr E rr DC Offs Gain W Video OSD 050 H On Screen Display
10. 57A600 21 470 EWOUT ViewSonic Corporation onfidential Do Not Copy E90fB 4 X 51v ZD726 7T 0 1UF IC801 806 LM1246DKA NC 56A366 509 R845 1 HBLK 24 C812 25407 baa 50829 P801 100P 2 CLAMP 23 68PF R822 FB801 3 7 0 7 d 4K7 1 R I 53A40 8 R836 3 22 0811 0807 25 VDD 1 1 IC802 33 0803 0814 anue Ren 0 56 551 525 0804 merg CPT 17 RF TINT CRT 2 GND 75 4 21 Re32 10UF C831 330K 1 4W lt 174148 184148 GND OUT LM2476 21 750 57125 802 ds ide s 1 2 100 1UF 100V0 1UF 294 VCG CRT 3 G I 53A40 8 R818 C824 5 sau Cour 2 R835 100 TZX Gun oe R842 R840 33 JUMP 057 1 3 71 1 0 47UH 1000 1UF 100V 0807 33 1 2W R824 D805 D813 4 GND C815
11. 6 19 R820 C819 es 8 3 BAV21 6 EM 75 1N4148 1 4148 G IN B OUT 4 FB803 v Mud 0 7 1 2 100 C843 IND1 R843 J810 5 53 40 8 R821 C823 7 18 ee 11 B IN VDD 2 C842 69 1 047UH L I 33 R827 0 7 5 0 IND2 I BEAD R826 D811 D812 JUMP 10 1 p 1UR 250V 6 GND 75 8 17 1 29 1D00p 250V Ho 1N4148 1N4148 GND PLL GND_2 x C830 x 3 17 cd 33A3278 6D oo33uF Rgi1 1500 L 1 21 OUTD3 T 9 16 10 47UH R817 VCO DA1 n 0 47U 62 FB805 70 8 J816 2 9 gt 4708 71 55 9 10 15 BEAD Dew R844 5V DA2 1 R816 6 9 330K 1 4W 5 0 2 9 OUTC1 21 R802 C817 20 2 81 40 3 100 R813 21 100 4 9 2 9 22 7 INC2 ouTce H vo 21 va R805 cus gt Cats 2 83 39 3 1000HM 33 1 2W a 100 4 9 z 8 13 C802 20K P802 pare R83 x 0808 L 100P 14 5V J818 4708 21 0 1UF 7T C806 BEAD F 2 C828 R833 roos zw 9811 0 01UF 2KV 13 lt b 100P 47UF 16V JUMPER BEAD 1 ud JUMP 0 1UR 250V BEAD 330K 1 4W 12 GND C826 C804 1000p 250V de 2470016 479 7100 11 HSPA R809 J809 x 1 220P 1KV o 12V R815 C813 BEAD 0810 FB804 150 1 4W 1UF 250V BAV21 560K 1 2W r 805 1807 820 R829 g 47UF 100V rye 4 C80
12. 2KOHM 5 1 4W R442 61C 60247252T CFR 4 7K OHM 5 1 6W R446 100 OHM 5 1 4W CFR 100HM 5 1 4W MGER 4 7KOHM 4 596 1 2W CFR 4 7K OHM 5 1 4W 61C 17220552T 2 5 1 4W R463 61 17210452T CFR100K OHM 5 1 4W R471 CFR 4 7K OHM 5 1 4W CFR 100HM 5 1 4W CFR 220KOHM 5 1 4W CFR 2 2 5 1 4W R433 R435 437 6iCID4DS T CFR 4 7K OHM 3 TW P61 172472527 CFR4 7K OHM 5 14W 61C 602333527 61C 60210052T CFR 10 OHM 5 1 6W R605 61C175L12152T CFR 120 OHM 5 1 2W R606 m ate ES ES ats ae 35 as ae ES ES ES ESI ES ES ES ES ESI ESI ESI 35 45 35 ESI ESI ES as ae ESI 35 ae lt lt Z Z Z Z 2121 Z Z Z Z Z Z Z Z Z 2 lt gt gt gt gt gt 05 6803 614212 10652 10 5 1 2 R900 405 6779 61A212Y10552T MGFR 1M 5 1 2W R901 61C 60275252T CFR 7 5K OHM 5 1 6W R902 m 2 gt 61C175L27152T CFR 270 OHM 5 1 2W R609 6iC60291352T CFR 91K OHM 1 572 1 6W N A 31 ViewSonic
13. Corporation Confidential Do Not Copy 90 4 ViewSonic P N Universal number Qt 6779 PL 00002759 00002759 PL 00002759 00002759 PL 00002759 00002759 PL 00002759 00002759 PL 00002759 00002759 PL 00002759 00002759 PL 00002759 00002759 N A E 00003628 E 00003628 00005625 00002740 amp 3 35 36 te 214121421 gt gt gt gt gt gt 2 gt 45 45 45 45 45 45 45 45 DIDI C C A C A oj wv oe o 9 p gt 4 45 6 2 N A gt A ota gt x A oo gt 48 48 48 48 48 48 48 48 49 49 _483 PL 00002759 484 PL 00002759 485 PL 00002759 486 PL 00002759 487 PL 00002759 488 PL 00002759 480 PL 00002759 490 PL 00002759 ___491 PL 00002759 PL 00002759 PL 00002759 PL 00002759 PL 00002759 PL 00002759 00003628 E 00003628 00003628 00002740 NA A 50 50 50 50 51 51 51 51 51 51 51 52 C n p N
14. L401 Wm JUMPER 54V 73 147 542 6718 Em 10UF R468 D409 C430 10 2200 500 NC 4148 HLIN 1 2K R456 E 150 3W 0410 79 167 124 250667 8401 W 150 2KV 22 2 1 1 4 doa C428 C490 C489 NC 2 2K R460 R421 0 56uF 250V 150PF 2K 47 2 4K7 1 4W 10 1 4W T 720 1 R476 560P 1KV R443 Q407 C429 R471 220K 1 4W 0705 JUMPER 57A419 503 T 0 1 100K 1 4W 57 498 3 25 945 423 8715 ER R487 13K Ne 2 2K 1 4W R722 C427 82K R475 1uF 250V 1 4W AKT 8479 R707 220K 1 4W 33K 1 4W C706 peso 0474 C402 R435 57 600 21 T 330 1KV R484 Q423 FR107 IRF630M x 5 JUMPER 57A419 503 T 100K 1 4 R411 x 28C945P JUMPER gt 4 x 3 R730 JUMPER 477 C420 2 2K R481 R413 0 1uF 250V gt 1 4W 10 1 4W 0416 ES zi 8 lt lt 52 0473 57 600 21 R478 R482 0422 FRIO7 8415 IRF630M 57A419 503 T 0 1 100 1 4W 25 945 gt R437 2 2K 1 4W R450 s iss xo 0 24uF 250V 0420 R488 0470 cate R449 57A600 28 220K 14W R447 Q408 FR107 IRF630B 57A419 503 T 0 1 100K 1 4W JUMPER 2SC945P n R904 Y L405 C425 2K7 1 4W 73 253 69 0 24uF 400V R412 Gabo 47K 1 4W 68K 1 4W 714 E 0406 2 2uF 100V R403 16V l R433 IRF630M
15. OHM 5 1 6 CFR 4 7K OHM 5 1 6W 6IC21010352T MFR 10K OHM 1 1 6 75 OHM 5 1 6W 61C60275052T CFR 75 OHM 5 1 6W 330HM 1 2 1 2 RES CF 5 1 4 4700HM 6IC60210152T CFR 100 OHM 5 1 6W 75 5 1 6 ___61 602101527 CFR 100 OHM 5 1 6W 33 OHM 5 1 6W FR 330K OHM 5 1 43 3OHM 1 2W 10 peaking 10 peaking 10 peaking FR 330K OHM 5 1 4W FR IK OHM 1 1 6 002740 ZX8V2A CREW NUT pr EAT SINK __ 55 66 oo 3t 36 zzz gt gt gt e 5 gt vi i lt gt gt gt gt gt gt 35 36 2121212 gt gt gt gt gt 35 55 55 zzz gt gt gt gt lt gt lt gt zz gt gt lt gt gt 22229 gt gt gt gt gt gt 4 4222 lt lt lt gt gt gt gt UA a 5 EAT SINK N A CREW M3x10 00004061 2476 CREW M3x10 Ma N A __________ AT SINK lol 3t 35 5 222 gt gt gt l 2121 lt gt gt gt gt CREW M3x10 00002874 DA4863A PHILIPS E 00004070 SJ584LS RANSISTOR H
16. angle between them constant ViewSonic Corporation onfidential Do Not Copy E90fB 4 6 Trouble Shooting Flow Chart 6 1 1 NO RASTER CRT RELATIVE CIRCUIT PROBLEMS CHECK MAIN PCB POWER SUPPLY 200V 14V 12V 7V 80V CHECK POWER SAVING CIRCUIT H SYNC V SYNC SIGNAL 0907 0935 CHECK THE VOLTAGE REFER ITEM 5 5 OF CRT ABOUT 25 5 26 5KV CHECK 0 PINI8 OUTPUT CHECK THE VOLTAGE OF CRT HEATER ABOUT 6 3V CHECK CRT S HEATER RELATIVE CIRCUIT Q907 Q935 CHECK SCREEN VOLTAGE ABOUT 400V TO 600V LESS THAN 300V CHECK FBT BRIGHTNESS SET TO MAX THEN CHECK CRT G1 VOLTAGE CHECK BRIGHTNESS CIRCUIT Q705 RELATIVE CIRCUIT CHECK VOLTAGE OF THE CRT CATHODE ABOUT 56V TO 65V REFER ITEM 6 2 ABNORMAL 17 ViewSonic Corporation onfidential Do Not Copy E90fB 4 6 1 2 ABNORMAL VIDEO LEVEL SCREEN CHECK THE VOLTAGE OF IC801 PIN 10 18 ABOUT 5V CHECK 5V RELATIVE CIRCUIT CHECK THE SIGNAL INPUT OF R GB ABOUT 0 7Vpp CHECK SIGNAL CABLE OR INTERFACE CARD CHECK IC801 PIN 23 CLAMP PULSE CHECK THE IC801 PIN 23 RELATIVE CIRCUIT CHECK THE VIDEO OUTPUT OF IC801 PIN 19 20 21 ABOUT 4Vpp CONTRAST SET MAX CHECK IC801 PIN19 PIN20 PIN21 RELATIVE CIRCUIT R GB APPROACH STANDARD 6 1 3 ABNORMAL DDC PLUG amp PLAY CHECK IC101 PIN 16 VOLTAGE ABOUT 5V CHECK 1 902 GOOD OR FAIL CHECK SIGNAL CABLE OR H802 PIN 2 4 DATA OUTPUT 18 ViewSonic Corporation onfident
17. for display tube warm up The Power On indicator lights when the display is on With proper signals feed to the display a pattern or data should appear on the screen adjust the brightness and contrast to the most pleasing display This monitor has power saving function following the VESA DPMS Be sure to connect the signal cable to the PC If your color display requires service it must be returned with the power cord ViewSonic Corporation onfidential Do Not Copy E90fB 4 3 Front Panel Function Control Description Adjusting the Screen Image Use the buttons on the front control panel to display and adjust the OSD controls The OSD controls are explained at the top of the next page and are defined in Main Menu Controls on page 8 CJONTRAST BRIGHTNESS Main Menu zoom H POSITION SIZE V POSITION SIZE With OSD controls PINCUSHION PIN BALANCE TRAPEZOID PARALLEL TILT 1 Front Control Panel shown below in detail Memory Recall returns adjustments to the original factory settings if the display is operating in a factory preset timing mode listed in this user guide Displays the Main Menu or exits the control screen and saves adjustments Scrolls through menu options and adjusts the displayed control Displays the control screen for the highlighted control Also toggles between two controls on some screens Power LED Green ON Orange Power Saving Po
18. is 29mm See below diagram Produce a complete red pattern on the display Adjust the purity magnet rings on the PCM assembly to obtain a complete field of the color red This is done by moving the two tabs in such a manner that they advance in an opposite direction but at the same time to obtain the same angle between the two tabs which should be approximately 180 Check the complete blue and complete green patterns to observe their respective color purity Make minor adjustments if needed RELATIVE PLACEMENT OF TYPICAL COMPONENTS yy Purity Magnets N 6 pole Convergence Magnets Z 4 4 pole Convergence Magnets ALLL yf Deflection Yoke YY E 7 lt 6 Convergence adjustment Produce a magenta crosshatch on the display the focus for the best overall focus on the display Also adjust the brightness to the desired condition Vertical red and blue lines are converged by varying the angle between the two tabs of the 4 pole magnets the PCM assembly See above diagrams Horizontal red and blue lines converged by varying the two tabs together keeping the angle between them constant E Produce a white crosshatch pattern on the display Vertical green and magenta lines converged by varying the angle between the two tabs of the 6 pole magnets G Horizontal green and magenta lines are converged by varying the two tabs together keeping the
19. to use an accurate periodically calibrated high voltage meter 7 1 The procedure for adjusting high voltage 15 shown on page 12 7 2 If can not be adjust 25 0 KV at immediate service is required to prevent the possibility of premature component failure 7 3 prevent X Radiation possibility it is essential to use the specified picture tube ViewSonic Corporation IMPORTANT SAFETY NOTICE There are special components used in this CRT displays which are important for safety These parts are identified by the international symbol AN on the schematic diagram and on the replacement parts list It is essential that these critical parts should be replaced with manufacture s specified parts to prevent X RADIATION shock fire or other hazards Do not modify the original design or this will void the original parts and labor guarantee onfidential Do Not Copy E90fB 4 2 Specification 1 CRT 46CM 19 90 Deflection Shadow mask 29mm Neck D dot pitch Non Glare Screen flat high contrast CRT 0 21mm H 0 25mm 2 Viewable image Size 45 7CM 18 diagonal 3 Display Color Unlimited Colors 4 External Controls Power On Off OSD key Function knob Contrast Brightness Degauss H Size H Center V Center V Size ZOOM Pincushion Trapezoid Pin Balance Parallelogram Rotation Color Temperature H Moire Reduce V Morie Memory Recall Language ViewMeter OSD position select
20. 0 COLOR TEMPERATURE ROTATION OSD EXIT HD H DRIVERCOMPENSATION VG MAX V SIZE GAIN RANGE HG H SIZE GAIN E H MOIRE REDUCE HS SUB H SIZE CORNER H Linearity Modify Ll BOTTOM CORNER VF V FOCUS ADJUST HR V HV Variation rate ajust TM BURN IN TIME ViewSonic Corporation onfidential Do Not Copy E90fB 4 H SIZE RANGE BI SET BURN IN Hs SUB H SIZE Bb BOTTOM BALANCE Hb H SIZE WAVE BALANCE Bp VOLTAGE ADJUST Tb TOP BALANCE EU EHT CURRENT EO EHT OFFSET EA EHT AUTO ADJUST VG MAX V SIZE GAIN RANGE DC video IC dc off set HG H SIZE GAIN SW H frequency select SB HIGH BRIGHTNESS SELECT LH Brightness Save RETURN VO V CENTER OFFSET D To switches the input signal to the other Timing Mode Please follow step C to get the optimum picture E Select the RETURN function and press MENU Key then the Factor Preset window will be returned to the original OSD window user s operating condition The setting data of the CONTRAST BRIGHTNESS PIN BALANCE PARALLELOGRAM ROTATION COLOR TEMPERATURE are common mode saved in the memory Don t needed adjust it individual at every timing Mode and save in the memory 3 White Balance Luminance adjustment A Press MENU Key to show OSD menu and press the down Key to select the size center function then press the menu Key to enter second menu press
21. 01 O P CHECK 56V 12V 6 5 CIRCUIT OUTPUT CHECK IC901 IC901 FAILURE HECK SENSE RESISTENCE ViewSonic Corporation 23 ABNORMAL VARIABLE OUTPUT MAKE SURE THAT THE VARIABLE OUTPUT IS NOT SHORTED CHECK IC101 PIN39 40 41 B DRIVER YES CHECK THE 56V OUTPUT CHECK D925 CHECK Q911 Q911 FAILURE 01 PIN30 ABOUTSV onfidential Do Not Copy 90 4 7 Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST E90fB 4 for ViewSonic Model Number VS10794 4M Rev la Serial No Prefix PT6 Item Description ECR ECN ViewSonic P N Ref P N Location Universal numbers Q ty 1 Accessories POWER CORD 4 A 00004049 89C402A18NIS E089A 1 2 CHASSIS FOR P985D 1VSC 4 B 00004051 CMP985DINVSC 1 3 CRT BAORD B 00004053 CRP985DINVSC 1 Cabinets BACK COVER C 00004055 34C6286 E7 F 1 5 BASE C 00002683 34C 741 QE L 1 6 FRONT PANEL C 00004054 34C6285AE7 F 1 7 SWIVEL PL 00004056 34C6293 QEL 1 8 Cables SIGNAL CABLE CB 00004057 89C 71B8MY HX 1 9 Documentation CD MANUAL DC 00004058 70CD918709 1A 1 0 Electronic 150UH 10 FOR TDK E 00002875 73C 253 69 T 1 1 2200 4007 00004073 67 3022114P 1 2 2815841 5 00004070 57 7514 0911 1 3 CHOKE COIL E 00004062 73C 253513H 1906 1 4 COIL E 0000407
22. 0531 403 0531 N A m 5 ae ae te s e s te te o a 45 te Z lt lt Z lt Z lt Z Z Z AAAA ENEE gt tn gt st tb 212 gt gt 33 ViewSonic Corporation Confidential Do Not Copy E90fB 4 ViewSonic P N Description Universal number Q t 26 WITCHING DIODE 21 E D 0403 0531 1N4148 E D 0403 0531 DIODE 14148 42 E D 0403 0531 DIODE 174148 83 E D 0403 0531 DIODE 154148 CFR 560K OHM 4 595 1 2W FB804 CORE RF BEAD RH 3 5X6X0 FB805 CORE RF BEAD RH 3 5X6X0 CORE RF BEAD RH 3 5 6 0 CORE RF BEAD RH 3 5X6X0 CORE RF BEAD RH 3 5 6 0 ____93 1060 62527 06 1865 _______ 1000 5 1 4W CFR 1000 5 1 4W 1000 5 1 4W 100 5 1 6 100 OHM 5 1 2W 100 5 1 6 RES CF 5 1 4W 4700HM MER 6 2 1 1 6 CFR 20K 5 1 6W CFR 20K 5 1 6W OHM 5 1 6W CFR 150 OHM 5 1 4W CFR 20K 5 1 6W RES 5 1 4 4700HM CFR 33 OHM 5 1 6W CFR 330K OHM 5 1 4 CFR 100 5 1 6W 61 602330527 33
23. 1 1000HM 1UF 100V 33 1 2W 560PF n 7 8846 E F 5 0802 21 CLP rou 93A64 501 52T 0 68 1W D809 100P BYV26 x HT 93C1060 501 52T 5 1 0801 FB809 4 ABL gt R804 BEAD JUMPER 1001 2W 3 G1 2 80 1805 FOCUS 4 GND 25 FF C834 y 33A3278 13D 49 ViewSonic Corporation onfidential Do Not Copy E90fB 4 11 Layout Diagrams 11 1 MAIN PCB LAYOUT E90fB 4 Confidential Do Not Copy ViewSonic Corporation 11 2 BOARD LAYOUT C840 R823 000 1 ps gee 14 II ViewSonic Corporation onfidential Do Not Copy E90fB 4 Reader s Response Dear Readers Thank you in advance for your feedback on our Service Manual which allows continuous improvement of our products We would appreciate your completion of the Assessment Matrix below for return to ViewSonic Corporation Assessment A What do you think about the content of this Service Manual 1 Precautions and Safety Notices 2 Specification 4 Circuit Description 5 Adjustment Procedure 6 Troubleshooting How Chart B Are you satisfied with this Service Manual 2 Service Manual Layout 3 Theformandiising d d d C Do you have any other opinions or suggestions regarding this
24. 167118LC 17401 1 6 DRIVER TRANS E 00001632 79 167124 HB 1 7 FBT E 00004064 79 793 1 LB 1 8 FUSE 4A 250V LF 618 004 E 00002695 84A 7 400 SL 1 E 00004068 9 IRFG30B scam 006 00004069 20 IRF630M S T PRESS Ru 576 60021 040 1 21 LMI246DKA NA NOPB 0 4019 566 366509 801 1 22 LM2476 56 551525 1 802 1 23 M24C08 WBN6P 00002717 56C1133508 1 102 1 E 00004066 24 MOSFET 57 600 14 0417 0418 0420 1 25 NTCR 100HM 20 sA THIN 0405 0377 61C 589T NR901 1 26 PHILIPS 15007 80252 E 00004067 57 7057 0403 1 27 PTCR 9 20 220V WAL 00002725 52274 PR901 1 28 4849 5 E 00004059 56C1125575x _ 1 101 1 29 SBYV26C E 00001604 93A106050652T 919 1 30 lt 707 00004071 57 724502 0901 1 31 TDA4863A PHILIPS 00002874 56 5841 1 601 1 32 1507 E 00004060 56 6255005 IC901 1 33 TRANSFORMER E 00004065 80C995D 1N1 7901 1 34 U4KB80R 00004072 93 50460 16 1 35 Hardware SCREW HW 00002750 B1C1035 10 47 1 36 SCREW HW 00002749 QIC 340 16 47 1 37 SCREW 4X7 FOR AC HW 00002758 DICI140 7128 1 38 Miscellaneous Rear Bracket HW 00004075 15C5659500 2 1 39 Packing Material Carton P 00004076 44C6925709 1A 1 40 EPS CUSHION 1 2 P 00004077 44C6932 1 1 41 5 CUSHION 2 2 00004078 44C6932 2 1 Remark 1 Above listed items are examples supplier can expand the rows to add more necessary items Remark 2 A
25. 1W 3DG945P 3 3n TOT gt x R909 R911 100 1 4W C908 JUMPER Ly gos ime Q902 1 4W T hy 25 1213 107 R902 Lae ad C947 7 5 8905 T 9 8906 H 6 2 3 So a 470 1 4W m 8 CN903 a 9 91K CONN 220V 50HZ H FREQ 68KHZ V FREQ 8587 CS TABLE Frequency 51 CS2 lt 40KHZ 0 0 2 crurinss 3 Pins 4 1 icto Pinas 7 1 PINS 0403 9 T901 PIN2 Pinas 2 Pina 1 901 PIN1 pt mp my AUR N 40KHZ 58KHZ 1 oe LAE ap Ff ANNA rr sk 1 1 258KHZ 1 ECIS Ace J K s LED1 POWERSAVING LED2 47 ViewSonic Corporation onfidential Do Not Copy E90fB 4 0601 amp 226 3 8 gt 93A52 47T 52T C605 D740 C740 R741 R740 15v
26. 214 47 MEE NC RI ox xvy NIIS ELE E adf p s gs p x xc t s gt j ee EU EE NU NEC a o 1 _ xq o o essi s t C ess n hs u xo o P 1 p _______ ERN me _________ Er C xvyu a ox pr c dr d 72286 xo qa o P 1 F sc 4 o e xo 4 eE eS t 52 2 11 11 0404 28 945 293 57 4195031 pscodP 9422 29 ViewSonic Corporation Confidential Do Not Copy E90fB 4 ViewSonic P N Location 57C4461 T DSCI2IBACTZE 57C420502T 5437 0905 906 57 4197 BCS 910 ____57 419503 pscosP ___ 0912 57C410508 T 5947 093 57 400271 54735 0 0 61 60210127 100 5 1 W CFR 100 5 1 6W CFR 100 5 1 6W R105 CFR 15K 5 1 6W R106 61C 602472527 4 5 WOW R107 61C 602222527 CFR22K OHM 5 VOW o O CFR 10 O
27. 4 73 147542 1401 1 5 DRIVE TRANSFORMER E 00004063 79C167118LC 17401 1 6 DRIVER TRANS E 00001632 79 167124 HB 1 7 FBT E 00004064 79 793 1 LB 1 8 FUSE 4A 250V LF 618 004 E 00002695 84A 7 400 SL 1 E 00004068 9 IRF630B 4 570 60028 _ 0416 00004069 20 IRF630M S T PRESS Ru 576 60021 040 1 21 LMI246DKA NA NOPB 0 4019 566 366509 801 1 22 LM2476 56 551525 1 802 1 23 M24C08 WBN6P 00002717 56C1133508 1 102 1 E 00004066 24 MOSFET 57 600 14 0417 0418 0420 1 25 NTCR 100HM 20 sA THIN 0405 0377 61C 589T NR901 1 26 PHILIPS 15007 80252 E 00004067 57 7057 0403 1 27 PTCR 9 20 220V WAL 00002725 52274 PR901 1 28 4849 5 E 00004059 56C1125575x _ 1 101 1 29 SBYV26C E 00001604 93A106050652T 919 1 30 lt 707 00004071 57 724502 0901 1 31 TDA4863A PHILIPS 00002874 56 5841 1 601 1 32 1507 E 00004060 56 6255005 IC901 1 33 TRANSFORMER E 00004065 80C995D 1N1 7901 1 34 U4KB80R 00004072 93 50460 16 1 35 Hardware SCREW HW 00002750 B1C1035 10 47 1 36 SCREW HW 00002749 QIC 340 16 47 1 37 SCREW 4X7 FOR AC HW 00002758 DICI140 7128 1 38 Miscellaneous Rear Bracket HW 00004075 15C5659500 2 1 39 Packing Material Carton P 00004076 44C6925709 1A 1 40 EPS CUSHION 1 2 P 00004077 44C6932 1 1 41 5 CUSHION 2 2 00004078 44C6932 2 1 Remark 1 Above listed items are
28. 7V SinColor 0 276V 51 50 P102 NCON5 0 KeyBoard J076 J077 NC NC 13K LED1 Green E Orange R102 lt SW102 gt sw105 o2 49 48 10K AT 55 46 45 101 48 2 44 43 NC 3K3 R168 93C22 48 H ons leno 42 10UF 16 0 1UF R131 2 2K 41 R149 TZX5V1B 40 6117 1500 100V L 1UF 50V 118 C126 Jumper R133 7 5 1 4W C946 H 0 1UF 250V VA R967 47K 1 4W 39 C125 NC 47UF 38 37 36 35 34 T C114 R151 v 2200 470 33 C109 L 2200 32 6124 XL 2200 8154 470 31 108 75 552200 137 127 0104 1 4148 30 164 100 29 56A1125 575 x C123 2 10000 115 146 7 5 51K 1 4W R161 l 120K 1 4W R150 120K 1 4W R417 36K 1 4W R972 2K 1 4W VR902 2K2 R420 R416 220K 1 4W 120K 1 4W R969 39K 1 4W 11K 1 4W LED NC 4022 NC 81A3 7 GP x LED4 Orange R155 2 4K 1 4W C433 5 lod 22U 50V D914 BAV20 C702 0 01 100V
29. B 4 TABLE OF CONTENTS 1 Precautions and Safety Notices 1 2 Specification 3 3 Front Panel Function Control Description 6 4 Circuit Description 10 5 Adjusting Procedure 13 6 Trouble Shooting Flow Chart 17 7 Recommended Spare Parts List 24 8 Exploded Diagram And Spare Parts List 36 9 Block Diagram 38 10 Schematic Diagrams 46 11 PCB Layout Diagrams 50 ViewSonic Corporation onfidential Do Not Copy E90fB 4 1 Precautions and Safety Notices WARNING This service information is designed for experience repair technicians only and is not designed for use by the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt within this service information by anyone else could result in serious injury or death 1 CAUTION No modification of any circuit should be attempted Service work should only be performed after you are thoroughly familiar with all of the following safety checks and servicing guide lines 2 SAFETY CHECK Care should be taken while servicing this CRT display because of the high voltage used in the deflection circuits These voltages are exposed in such areas as the associated flyback and yoke circuits 3 FIRE amp SHOCK HAZARD 3 1 Inse
30. Consumption Modes On lt 75W max Green LED Sleep 4W Amber LED Off lt 2W Regulatiory Safety UL CUL FCC B CE DHHS ICES 003 NOM TUV GS TUV Ergo GOST R SASO BSMI PSB Argentina TUV S EPA Energy Star 2005 ViewSonic Corporation tier1 onfidential Do Not Copy 90 4 OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the Color display 1 Position the display on the desired operation and plug the power cord into a convenient AC outlet Three wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduit ground If the AC outlet in your location does not have provisions for the grounded type plug the installer should attach the proper adapter to ensure a safe ground potential Connect the 15 pin color display shielded signal cable to your signal system device and lock both screws on the connector to ensure firm grounding The connector information is as follow 15 Pin Color Display Signal Cable PIN NO DESCRIPTION PIN NO DESCRIPTION RED V 9 5V From PC GREEN V 10 Sync GND BLUE V 11 NC NC 12 SDA GND 13 H SYNC GND R 14 V SYNC GND G 15 SCL pas GND B Apply power to the display by turning the power switch to the ON position and allow about thirty seconds
31. E PRING PIECE IRE HARNESS E 00004059 4849 5 00002717 24C08 WBN6P E 00004060 TEA1507P 56 133557 17805 N A TCET 1103G E 00004074 C E 00002875 150UH 10 FOR TDK L405 ____73 1747530 LINE FILTER 180UH 100UH L903 100UH 180UH 195 7 00004062 CHOKE COIL P32052CE DIY ZY 96 97 98 E 99 103 E 212 21 gt gt gt gt Q Z n l H dE dk dE dk dk S dk d 3 22 22 lt lt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt n 906 AFER 3 o 00002725 TCR 9OHM 20 220 WAL E 00004068 RF630B MOFR OHM 5 IW 39KOHM 5 2W 680 OHM 5 2W R426 MOFR 0 51 OHM 5 3W R428 22 OHM 5 2W R455 MOFR 150 OHM 5 3W MOFR 1 OHM 5 2W OFR 0 68 OHM 5 2W 2 OHM 5 2W K IW N A OFR 680 OHM 5 IW gt 3E 212 24122 gt gt BI 8 E lt gt T N oo T N a R P m gt 2522 gt gt gt lt gt lt 35 212 gt gt lt 27 ViewSonic Corporation Confidential Do Not Copy E90fB 4 147 ma MOFREX s 2W JR O T y y fo NA 6ICIS2MS6064 MO
32. FR 56 59717 Ro T 153 ma rcas wo r i34 E0408 _ ____19 167118 LC DRIVETRANSFORMER mo TC 155 mcm3iLB her o mo S 1 F 00001632 79C 167124 DRIVERTRANS t T 00 4065 s0C995DINI TRANSFORMER mo E R 0405 6807 SSCS 65CAS00043T 0110 50V 65C4S01043T 0 TUF 50V 100UF 20 16V 04 4629 65C44210113T 100PF 4 596 NPO 50V 04 4629 65C44210113T IOOPF 5 NPO 50V 04 4629 65C44210113T 100PF 5 NPO 307 04 4659 65CA442IOLI3T 100 3 5 50 65C4440223T 2200 10 YSP 50V 65442330131 33PF 5 NPO 50V IT 2 0010F 100V 3 54 65Ci501047T 0 1 UF 80 20 30V 6iCI7IO20T IOOOPF 3 5 63V 6730947 3T 470UF 20 16V 67C3054707T TUF 20 507 65 1K331 576921 10 GiCI7MI032T MPE 0 01UF 250V 5 67 3082201 2202 20 250V 65 1561 576921 560 10 YSP IKV IT 2 0 022UF 100V 3 55 DID o N gt S 299 N ON gt S lt 00001632 00004065 28 ViewSonic Corporatio
33. HM 5 1 6W 61C 602100527 CFRIOOHM 5 WoW Ru 61 602151527 ____ 150 OHM 5 RI2 61 602182527 CFR 1 8K 5 VOW O 61C 60239252T ____ 3 9K 5 VOW io 61C602122522T CFR 1 2K OHM 5 VOW is ___61 602470527 ____ 47 OHM 5 VOW io 61 60210127 100 5 WoW RI2 O 61 602472527 CFR4 7K 5 1 63 61 602102527 5 66 2 61 602103527 10 5 o O 61C 60233352T ____ 50 VOW RD28 O Universal numbers Q t 3t 35 55 222 gt gt gt dt gt 3t 35 36 2121212 gt gt gt gt dt gt dt lt gt 35 55 gt gt gt gt lt gt Ra 5 53 oS no 22122 gt gt gt gt gt 35 55 55 zzz gt gt gt gt lt gt lt gt at 3 zz gt gt lt gt dt gt NA gt 6IC 0TIS2T CFR 470 OHM 5 1 6W 61C 602753521 CFR 75K OHM 5 0617 N A 616602101527 100 OHM 5 1 6W 35 36 2121212 gt gt gt gt lt gt ww gt WI
34. N 3t 212 gt gt gt A UA gt a gt 00 1 3t 3k te 21222 gt gt gt gt gt 3t 35 55 3 gt gt gt gt lt gt zt 35 2121212 gt gt gt gt gt lt gt 3t 35 55 zzz gt gt gt gt lt gt 212 gt gt 30 ViewSonic Corporation Confidential Do Not Copy E90fB 4 ViewSonic P N 6101751682527 CFR 6 8K OHM 3 54 1 29 6iCIDXMSPT CFR 220 5 14W Universal numbers Q t gt N A gt B gt E eoe 45 45 45 45 rear 45 45 45 gt N gt 45 45 lt lt 45 45 45 45 45 45 45 45 45 45 anf RIB AES 3t te 3E te 4 amp te te 2220222242 gt gt gt gt gt gt gt gt gt a 61C 60247152T CFR 470 OHM 5 1 6W 61C 17210452T CFR100K OHM 5 1 4W 61C 17222252T CFR 2 2KOHM 5 1 4W 61C 60233352T CFR 33K OHM 5 1 6W R440 61 17222252T CFR 2
35. ONTAL WIDTH OF VIDEO READJUST H WIDTH FUNCTION CHECK THE RELATIVE CIRCUIT OFQ406 CHECK FBT VOLTAGE ABOUT 62V AT FH 31KHz CHECK THE RELATIVE CIRCUIT OF SMPS CHECK THE HV OF CRT ABOUT 25KV 6 5 2 ABNORMAL HORIZONTAL LINEARITY CHECK LA01 Q426 Q420 Q427 AND IC101 PIN9 10 11 21 ViewSonic Corporation onfidential Do Not Copy E90fB 4 6 6 ABNORMAL VERTICAL SCANNING 6 6 1 ABNORMAL VERTICAL SIZE READJUST V SIZE FUNCTION VALUE CHECK THE IC601 PINI ABOUT 11 8V PIN4 ABOUT 12V CHECK D601 C605 RELATIVE CIRCUIT CHECK VERT OSC CIRCUIT CHECK THE VOLTAGE OF IC101 RELATIVE CIRCUIT READJUST V SIZE FUNCTION VALUE CHECK IC101 PIN33 34 RELATIVE CIRCUIT 6 6 2 VERTICAL CENTER READJUST V CENTER CHECK IC101 AND IC601 RELATIVE CKT 6 7 SIDE PIN CUSHION DISTORTION READJUST CHECK IC101 Q406 RELATIVE CKT 6 8 POOR FOCUS READJUST FOCUS CONTROL CHECK FOCUS CONTROL UNIT FOCUS LEAD WIRE CRT SOCKET amp CRT 22 ViewSonic Corporation onfidential Do Not Copy E90fB 4 6 9 POWER SUPPLY TROUBLE SHOOTING CHART BEFORE CHECK SW REG PLEASE REFER TO THE POWER SUPPLY BLOCK DIAGRAM POWER SUPPLY OUTPUT A VARIABLE OUTPUT 60V B CONSTANT OUTPUT 6 3V 14V 80V 200 12V BEAD SET CHECK AC LINE VOLT 120V OR 220V CHECK F901 SW901 CHECK LINE RECTIFIED amp SMOOTHED VOLT CHECK BRIDGE RECTIFIED CHECK START C K T R936 CHECK T9
36. OUSING EAT SINK CREW M3x8 HEU m gt gt CREW 3 10 CREW MV1500M AOC E 00004067 HILIPS 1500V 12A BU252 E 00004069 RF630M S T E 00004066 MOSFET E 00004066 MOSFET 3200298 EAT SINK CREW M3x8 lt gt Q E gt 5 dt 3 34 ViewSonic Corporation Confidential Do Not Copy E90fB 4 2 Q 906181 HEATSINK __ 730628 SCREW M3x6_ MOSFET NA 3X 9C209 E ViewSonic P N Ref P N Universal number Q t P E R 0405 0377 61C 58 9T NTCR 100HM 20 5A THIN M 00002753 87C 5016 AC SOCKET 95C 80021 WIRE HARNESS C 00 0 E 00003860 750655372 519 DFTMCRT 686 65CIK4705T60001 12 1 __2 00003625 _______95 9023 JUMER CHB 1 688 95C20 F501 _ 16 PULSE 465 1 E 00008860 1750 65577 7 SDII DFTMCRT 65CIK4705T601 M7PIKV 090 1 __2 00003625 _______95 9023 JUMPER 40 1 95C0700 WIREHARNESS 11 93 1750455379852 19 MPRIISDICRTASSYM ZOA 35 ViewSonic Corporation Confidential Do Not Copy E90fB 4 8 Exploded Diagram And Spare Parts List je 36 ViewSonic Corporation onfidenti
37. RANS T402 FOCUS VRI amp VR2 5 ABL ADJ PCB MAIN AB in factory OSD 6 PCB MAIN 8 101 FUNCTION ADJ menu UP A PCB MAIN SW102 DOWN Y PCB MAIN SW103 PCB MAIN SW104 18 5 3 ADJUSTMENT METHOD 1 14V B amp HV voltage adjustment A Chroma 2000 Signal generator or PC equivalent set mode 1 VGA 640X480 pattern 1 0 B Connect a DC Volt meter between TP901 and ground then adjust VR903to be 14VDC C Connect a DC Volt meter between TP902 and ground then adjust VR902 to be 65 5 VDC 2 Factory preset Timings Adjustment A Press 8 Key to show OSD window press Up or Down Key to switch the functional controls B Press the Up Key to select the ZOOM function then press the MENU Key While do not release the MENU Key until the OSD window changed to the Factory preset window C The Factory preset window contains the following functional controls Select one of the control Then press the Up Down Key to adjust its value for the optimum picture ViewSonic Corporation onfidential Do Not Copy E90fB 4 E CONTRAST V LINEARITY BRIGHTNESS V LINEARITY zu H CENTER RD R GAIN H SIZE G GAIN V CENTER B GAIN V SIZE RD R BIAS DO DEGAUSS 6 G BIAS ii PINCUSHION Bx R BIAS TRAPEZOID 9300 COLOR TEMPERATURE PIN BALANCE 6500 COLOR TEMPERATURE L PARALLELOGRAM 5
38. Service Manual ViewSonic E90fB 4 Model No VS10794 19 PerfectFlat Color Monitor E90fB 4 SM Rev 1a Nov 2005 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Copyright Copyright 2005 by ViewSonic Corporation All rights reserved part of this publication may be reproduced transmitted transcribed stored in a retrieval system or translated into any language or computer language in any form or by any means electronic mechanical magnetic optical chemical manual or otherwise without the prior written permission of ViewSonic Corporation Disclaimer ViewSonic makes no representations or warranties either expressed or implied with respect to the contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose Further ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes Trademarks Optiquest is registered trademark of ViewSonic Corporation ViewSonic is a registered trademark of ViewSonic Corporation All other trademarks used within this document are the property of their respective owners Revision History SM Editing Date ECR Number Description of Changes 11 24 05 Initial Release Sophia Kao E pl pe ViewSonic Corporation onfidential Do Not Copy E90f
39. W R900 PR901 10 R 1 4W 878 18 n x A733 lt gt bai 10M 1 2W D939 3 9 m 1N4148 T T 9 S a Bre NS SL xS m5 oe yE e a913 alg 2 mi SE 2 C910 gu ag SB240 C939 47UFA6V 8982 C945 ENN 1000UF 16V L903 Wet IC901 56A625 500 S 2 00 1 1507 707 77 77 14 73 25810110 127 1 6967 10K 1 4 299 4 gt m 100 16V g DRAIN CC 1 330 1 2W 0922 C944 7 2 TUE 27 200 T 1000UF 16V T a7OUFM6V lt gt GND 15 lt gt 7 gt lA 0912 8 o ta 6 4 5 S Y ss OTS DRIMEFRL amp x 20 1904 ES 16 73C 25810110T 12 5 4 ESE SEDEMAG EL D930 815 C961 BYV27 200 E C945 1 32 901 470UF 25V Oe S 2 2 2500 8903 NC ms 150 C934 C935 NP Sis 25929 a j 1220 50V 1UF 50V 47u 25V C306 YS 2 als FH R912 0 022U 100V 8 2 8989 3K3 12904 I are JL TLASTACZ AP 915 4 i 2K7 1 2W C903 e TCET 1103 D938 C940 0913 1 15817 BYV26C 1n 500V ig R914 1 902 56 133 5 5 47R L7805CV 1 T GO R953 R951 Pr 5K6 1 2W 1K gt C918 0935 2700UF 16V BT169B D936 L C928 144148 47PAKV P m vic R922 15 1 2W JUMPE 1 1 R907 Q907 Q903 BC547B 0933 680
40. al Do Not Copy E90fB 4 EXPLODED PARTS LIST E90fB 4 for amp G Model ViewSonic Model Number VS10794 1M G Rev 1a ViewSonic P N 00004054 N A N A N A N A N A C 00004055 HW 00002749 PL 00004056 C 00002683 34C7AL QEL E 00003860 CRT 85C6027 606 SHIELD PCS 37 ViewSonic Corporation Confidential Do Not Copy E90fB 4 9 Block Diagram 12802 9 LM2476 OP LB 26 8 Gl a 1 101 5444849 MCU and deflection Q402 401 0403 7402 function Hor Driver 0907 12903 Power saving Protection 0406 H SIZE Control G1 Control Q705 Circuit 38 ViewSonic Corporation Confidential Do Not Copy E90fB 4 1101 SAA4849 ViewSonic Corporation 101 SwiCh ic Nc 56 DSDA 29 3 ISDA 84 Mute Vs 53 5 ROTA Hs 52 6 EEP WR 21 Unlock Pro 50 BicLAMP vsOUT 42 91cst REM 48 10 082 11 XTAL2 46 42 standby XTAL1 45 13 OFF MODE 44 14 VSSE VDDA 433 d Vssa 42 16 H 17 40 18 Bsens 39 19 38 20 vref 37 21 HFB Iref 36 22 XRAY EWdrv 39 23 mST 34 24 Viocus vuoti 33 25 Deguss EHT 2 26 ABLadj DouColor 31 27 2 Uvolt 3 28 SinColor 29 56A1 125 575 39 Confidential Do Not Copy E90fB 4 BLOCK DIAGRAM
41. cro controller doesn t interrupt the system the system will shut down to Idle mode For any interaction of the micro controller the XRAY occurrence has to be acknowledged by the micro controller by clearing the bit SY STATUS 2 The micro controller take over the control of the handling via software The actual xray pin status can be read through bit SY STATUS 1 Quartz Oscillator pin45 pin46 The quartz oscillator circuit is available on pins XTAL1 input XTAL2 output and works together with an external 48MHz 3 overtone quartz As a result the quartz oscillator is always running on 48MHz Other quartz crystal frequencies than 48 MHz cannot be used External capacitors on XTAL1 and XTAL2 are not allowed Control Function Block The B control block of the SAA4849 has the same behaviour as the TDA4856 with adapted threshol voltages The circuit allows the user to choose the trigger edge of the HDRV signal and the polarity of the output stage via The control function block of the SAA4849 consists of an Operational Transconductance Amplifier OTA a voltage comparator a flip flop and a discharge circuit This configuration allows easy application for different B control concepts HPLL The horizontal part contains a PLL which works over the full frequency range from 25kHz to 140 kHz This range can be reduced by a ower and an upper frequency limit Write Once Registers HPMAX and HPMIN Via bus the number of 48MHz clock cycle
42. e H SYNC and V SYNC input and the polarity are setting in the positive When no signal input the Pin49 will output a 75Hz V SYNC free run signal The Pin18 20will output 6 2 H SYNC free run signal for the monitor testing use Reset Circuit pin23 There are three ways possible to invoke a reset and initialize the SAA4849 micro controller part Via power on reset circuit Via watchdog timer overflow only micro controller reset Via deflection reset after start up only micro controller reset The reset pin pin23 is connected to a Schmitt trigger for nose reduction A reset is accomplished by holding the Reset pin HIGH C145 22U 5V RST Pin23 Hi532 sec E 0 1UF 10 ViewSonic Corporation onfidential Do Not Copy E90fB 4 x ray protection The x ray ptotection pin22 input XRAY provides a voltage detector with a precise voltage input for X ray protection If the input voltage at XRAY exceeds the upper threshold for 150us to 300us the system is forced to shut down by switching off vertical H and B drive signals There are two different ways to handle the system in case of XRAY occurrence If the xray latch enable bit UCXRAY 2 was set to 0 during startup the system will shut down without any interference of the uC The deflection controller is set to Idle mode Restart of the system only possible due to seitching power off power on If register bit UCXRAY 2 was set to 1 micro controller interaction is allowed If the mi
43. een display menus control screens lt ViewMeter displays the frequencies horizontal and vertical coming from the graphics card of the computer ViewSonic Corporation onfidential Do Not Copy E90fB 4 4 Circuit Description 4 1 MICRO CONTROLLER AND DEFLECTION CIRCUIT MICRO Controller The micro controller IC101 core is a 80C51 type The micro clock frequency of 12 Mhz is derived from the Xtal oscillator which is running at 48MHz The DDC interface is suitable to handle DDC2 modified hardware interface Standard high current ports 3 ADC pouts with voltage inputs and 4 static standard 8 bit DAC outputs low interference and one PWM output for digital control application are implemented The central processing unit CPU manipulates operands in two memory spaces These are the 1024byte internal data memory consisting of 256 bytes standard RAM and 768 bytes AUX RAM and 48K byte internal program memory The programmemory of the SAA4849 consists of 48K bytes ROM The SAA4849P provides sync Processing with full auto sync Capability a flexible SMPS block and an extensive set of geometry control facilities Further the IC generates the drive waveforms for DC coupled vertical boosters to the TDA4863A sync signals processor The functions of the sync processor include polarity detection H SYNC amp V SYNC signals counting Programmable SYNC signals output free running signal generator Pin52 Pin53 are for th
44. examples supplier can expand the rows to add more necessary items Remark 2 All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN ECR approved by ViewSonic Corporation This is to eliminate repeated cross checks of each item between this version and prior versions 24 ViewSonic Corporation onfidential Do Not Copy E90fB 4 1 RECOMMENDED SPARE PARTS LIST E90fB 4 for ViewSonic Model Number VS10794 4G Serial No Prefix PTC Item Description ECR ECN ViewSonic P N Ref P N Location Universal numbers Q ty 1 Accessories POWER CORD 4G 00004050 89C414A18N IS E089A 1 2 Board Assembly 5515 FOR B985D 1VSC 4G B 00004052 CMP985DINVW 1 3 CRT BAORD B 00004053 CRP985DINVSC 1 Cabinets BACK COVER C 00004055 34C6286 E7 F 1 5 BASE C 00002683 34C 741 QE L 1 6 FRONT PANEL C 00004054 34C6285AE7 F 1 7 SWIVEL PL 00004056 34C6293 QEL 1 8 Cables SIGNAL CABLE CB 00004057 89C 71B8MY HX 1 9 Documentation CD MANUAL DC 00004058 70CD918709 1A 1 0 Electronic 150UH 10 FOR TDK E 00002875 73C 253 69 T 1 1 2200 4007 00004073 67 3022114P 1 2 2815841 5 00004070 57 7514 0911 1 3 CHOKE COIL E 00004062 73C 253513H 1906 1 4 COIL E 00004074 73 147542 1401 1 5 DRIVE TRANSFORMER E 00004063 79C
45. ial Do Not Copy E90fB 4 6 2 ABNORMAL DISPLAY 6 2 1 NO SIGNAL ON SCREEN CHECK VIDEO IC801 VCC ABOUT 5V CHECK THE 5V PIN OF P802 CONNECTOR CHECK THE OUTPUT VOLTAGE OF IC801 PIN 19 20 21 ABOUT 3Vpp CHECK THE RELATIVE CIRCUIT OF IC801 PIN 10 PIN 18 Vcc CIRCUIT CHECK THE VOLTAGE VIDEO AMP ABOUT 80V CHECK THE 80V RELATIVE CIRCUIT ON MAIN PCB CHECK THE VOLTAGE OF CRT CATHODE ABOUT 40Vpp CHECK THE IC802 RELATIVE CIRCUIT HECK THE VOLTAGE OF FBT SCREEN ABOUT 400V TO 700V LESS THAN 400V CHECK FBT RELATIVE CIRCUIT EXCEED 700V CHECK FBT amp CRT RELATIVE CIRCUIT OR REFER ITEM 6 1 19 ViewSonic Corporation onfidential Do Not Copy E90fB 4 6 3 NO BLANKING CHECK THE RELATIVE CIRCUIT OF BLANKING CHECK THE RELATIVE CIRCUIT OF FBT CHECK R821 ON VIDEO PCB CHECK RELATIVE CIRCUIT FBT PIN 5 ON MAIN PCB 6 4 HOR OSC DEF HV CIRCUIT FAULT 6 4 1 NO RASTER DISCONNECT WITH SIGNAL CABLE CHECK IC101 PIN 16 ABOUT 5 VDC CHECK IC101 PIN 5 RELATIVE CIRCUIT CHECK 1 101 PIN20 WAVE FORM ABOUT 3Vpp CHECK IC101 PIN20 RELATIVE CIRCUIT CHECK THE COLLECTOR VOLTAGE OF Q402 ABOUT 14Vpp CHECK Q402 T401 RELATIVE CIRCUIT CHECK THE COLLECTOR VOLTAGE OF 0403 ABOUT 1200Vpp AT CHECK 401 402 0402 0403 D408 C418 C419 H DY 20 ViewSonic Corporation onfidential Do Not Copy E90fB 4 6 5 ABNORMAL HORIZONTAL DEFLECTION 6 5 1 ABNORMAL HORIZ
46. l from the menu With Degauss selected from the menu press button 2 to degauss the monitor manually Important Do not degauss repeatedly Doing so can be harmful to the display Wait at least 20 minutes before selecting this control again R ViewMatch Color provides several color options several preset color temperatures and User G B Color which allows you to adjust red R green G and blue B The factory setting for this product is 9300K 9300 Kelvin 9300K Adds blue to the screen image for cooler white used in most office settings with fluorescent lighting 6500K Adds red to the screen image for warmer white and richer red 5000K Adds blue and green to the screen image for a darker color User Color Individual adjustments for red green and blue Moire reduces interference patterns that appear as ripples waves or unwanted background color textures Interference patterns of this type are most noticeable when viewing images having closely spaced lines or finely detailed patterns QOQ Language allows you to choose from among several languages for the menus and control screens English French German Italian and Spanish Cy Memory Recall returns adjustments to the original factory settings if the display is operating in a factory preset timing mode listed in this user guide Exception This control does not affect changes made with the User Color control a 4050 050 Position allows you to move on scr
47. ll revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN ECR approved by ViewSonic Corporation This is to eliminate repeated cross checks of each item between this version and prior versions 25 ViewSonic Corporation onfidential Do Not Copy E90fB 4 N NIN 2 2 2 4 5 6 N N o 45 45 RIS s Item 6 aa _13 15 16 LU 18 19 20 24 25 _26 _27 29 34 39 40 _44 45 47 4 _54 62 63 64 65 66 _67 68 69 BOM LIST E90fB 4 for M amp ViewSonic Model Number VS10794 1M G Rev la ViewSonic P N B 00004051 B 00004052 3t 35 36 2121212 gt gt gt gt gt 35 55 55 gt gt gt gt gt 00002683 00004054 00004055 PL 00004056 P 00 P 00 P 00 004076 004077 004078 P 0 0002871 a gt Q c ae 552222 22222 22 2 52 2 gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt 004058 004057 004049 004050 nm EE 5 Z gt 0002750 0002758 0002749 00004053
48. mbination 1500 ohm resistor and 0 15uF capacitor 5 4 Move the resistor connection to each exposed metallic part and measure the voltage 5 5 Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement 5 6 Voltage measured must not exceed 7 5 volt RMS from any exposed metallic part to ground A leakage current tester may be used in the above hot check in which case any current measured must not exceed 5 0 milliamp In the case of a measurement exceeding the 5 0 milliamp value a rework is required to eliminate the chance of shock hazard Note High voltage is present when this CRT display is operating Always discharge the anode of the picture tube to the display chassis to prevent shock hazard AC VOLTMETER EARTH GROUND TO INSTRUMENT S i 0 15 F EXPOSED AW METAL PARTS 1500 10W Fig 1 6 IMPLOSION PROTECTION Picture tubes are equipped with an integral implosion protection system but should be taken to avoid damage and scratching during installation Use only Panasonic replacement picture tubes 7 X RADIATION WARNING The only potential source of X Radiation is the picture tube However when the high voltage circuit 1s operating properly there is no possibility of X Radiation problem The basic precaution which must be exercised 1 to keep the high voltage at the following factory recommended level Note It is important
49. n Confidential Do Not Copy E90fB 4 ViewSonic P N Qt 404 1629 JA 676 309100 37 100 3 20 16V E D 0403 2800 04050531 64 11527 DIODE IN4148 E D 0403 2800 00001604 00001604 E D 0403 0531 E D 0403 0531 00002716 00002716 00002716 00002716 NIA D 0403 0531 03 1008 3E 3k dE dE dk 22222222222 gt gt gt gt gt gt gt gt gt gt gt P N a N A oo N w m 9 22525222 22 gt gt gt gt gt gt gt Gr 55 N 110 oju m e gt elo N ON N gt A N gt ajajaja vJ VY ESI ESI ESI ESI at e 35 ae ts 2 Z Z Z Z Z Z Z Z Z Z Z gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt gt N S m m 3c ae e e 21222 2121 lt 5 gt gt gt gt gt gt 0 001604 m v gt 403 0531 403 0531 403 053 03 053 03 2800 5 403 1005 93 1040 252 UF4004 D929 D930 as
50. ontrol setting and Exit the menu press button 1 twice ViewSonic Corporation onfidential Do Not Copy E90fB 4 Menu Controls Adjust the menu items shown below by using the up and down buttons Control Explanation Contrast adjusts the difference between the image background black level v and the foreground white level Brightness adjusts the background black level of the screen image ZOOM expands and contracts entire screen image w Horizontal Position moves the screen image left or right Horizontal Size adjusts width of the screen image Vertical Position moves the screen image up or down Vertical Size adjusts the height of the screen image Pincushion curves the vertical sides of the screen image Pin Balance curves the vertical edges of the screen image to the left or right Trapezoid adjusts the top and bottom of the screen image until they have equal length Parallel slants the vertical edges of the screen image until they are parallel Tilt rotates the entire screen image OT onfidential Do Not Copy E90fB 4 Control Explanation A Degauss removes the build up of magnetic fields that can cause irregular colors to appear around the edges of screen images There are two ways to degauss the display automatically by turning the monitor on or manually by selecting the Degauss contro
51. rt an isolation transformer between the CRT display and AC power line before servicing the chassis 3 2 Inservicing pay attention to original lead dress especially in the high voltage circuit If a short circuit is found replace all parts which have been overheated as a result of the short circuit 3 3 Allthe protective devices munt be reinstalled per original design 3 4 Soldering must be inspected for possible cold solder joints frayed leads damaged insulation solder splashes or sharp solder points Be certain to remove all foreign material 4 LEAKAGE CURRENT COLD CHECK 4 1 Unplug the AC cord and connect a jumper between the two prongs on the plug 4 2 Turn the CRT display power switch 4 3 Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metallic part on the CRT display such as the metal frame screwheads control shafts etc When the exposed metallic part has a return path to the chassis the reading should be 1 8 megohm minimum 5 LEAKAGE CURRENT HOT CHECK 5 1 Plug the AC cord directly into the AC outlet Do not use an isolation transformer during this check 5 2 Connecta 1500 ohm 10 watt resistor paralleled by a 0 15uF capacitor between each exposed metallic part and good earth ground as shown in Fig 1 5 3 Use AC voltmeter with 1000 ohm volt or more sensitivity and measure the AC voltage across the ViewSonic Corporation onfidential Do Not Copy E90fB 4 co
52. s is sent through the register The slewing speed during mode change is also programmable in a write once register HSLEW After the clocks for the HPLL are switched on the HPLL starts with a fixed freerunning frequency of 60 kHz The H drive pulses are not active and the start up procedure is inhibited The default setting of register bit HCONTROL 0 will cause the HPLL to slew switch to the freerunning frequency defined in the register HPFREE the default value is also 60 kHz Independent on H syncs which are possibly present the HPLL will slew to that freerunning frequency To achieve an always defined starting point for the startup procedure this procedure cannot be interrupted ViewSonic Corporation onfidential Do Not Copy E90fB 4 4 2 TRANSISTOR amp DIODE CIRCUIT LOCATION CIRCUIT FUNCTION DESCRIPTION 7 1 7777 7771 EMEN _ pope ViewSonic Corporation Confidential Do Not Copy E90fB 4 5 Adjusting Procedure 5 1LADJUSTMENT CONDITIONS AND PRECAUTIONS 1 Approximately 30 minutes should be allowed for warm up before proceeding 2 Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory 5 2 MAIN ADJUSTMENTS NO FUNCTION LOCATION DESIGNATION 1 14 VR903 2 B ADJ PCB MAIN VR902 3 SCREEN ADJ FLY BACK TRANS T402 SCREEN VR 4 FOCUS ADJ FLY BACK T
53. service manual Reader 5 basic dada Na m Add __ e O __ _ _ _ After completing this form please return it to ViewSonic Quality Assurance the USA at facsimile 1 909 839 7943 You may also e mail any suggestions to the Director Quality Systems amp Processes marc maupin viewsonic com 52 onfidential Do Not Copy E90fB 4
54. the down key to select zoom about 10S then enter into factory setting area for modulation Set R G B gain DAC value for 30 R bias DAC value for 40 C Raster Pattern Brightness amp contrast ratio MAX fix to G BIAS fix to 40 adjust or B bias make x 265 10 290 10 adjust G2 make Y 3 0 cd m and then adjust brightness make 0 05 cd m save it into 9300 6500 5000 color temprature D adjust R or G or B gain make x 346 10 359 10 Y 150 5 cd m then save it into 5000K color temprature E adjust R G or B gain make 313 10 329 10 Y 150 5 cd m then save it into 6500K color temprature adjust R or G or B gain make x 283 10 297 10 Y 150 5 cd m then save it into 9300K color temprature G After modulation it s necessary to check if the white balance accords with the normal specification If not which needs reset ViewSonic Corporation onfidential Do Not Copy E90fB 4 4 Focus Adjustment A under 1024x768 85Hz with character full page Adjust brightness to center and contrast to max Then adjust focus to a fine vertical line Adjust focus VR2 to a fine horizontal line Repeat step C amp D then fix the Focus VR G2 5 Purity Adjustment A B Be sure that the display 1 not being exposed to any external magnetic fields Ensure that the spacing between the Purity Convergence Magnet PCM assembly and the CRT stem
55. wer On Off ViewSonic Corporation onfidential Do Not Copy E90fB 4 OSD Lock Settings You have the option of using the On Screen Display OSD locking feature OSD LOCK to prevent unwanted changes to the current image settings OSD Lock Press and hold the 1 button on the face of the monitor for 10 seconds The message OSD will then display briefly indicating that the OSD image settings are now locked OSD Unlock Press and hold the 1 button again for 10 seconds The message OSD UNLOCK will then display briefly indicating that the OSD image settings are now unlocked Do the following to adjust the screen image 1 To display the Main Menu press button 1 MAIN MENU 1 CONTRAST BRIGHTNESS ZOOM H POSITION SIZE V POSITION SIZE PINCUSHION PIN BALANCE TRAPEZOID PARALLEL TILT EXIT 1 SELECT 2 Toselect a control you want to adjust press the arrow buttons on the front control panel of your monitor and scroll through the choices When the desired control is highlighted press button 2 NOTE Some controls on the Main Menu are listed in pairs such as Contrast Brightness Display control screen sample shown in step 3 below Press button 2 to toggle to the next control in the pair 3 Toadjust the setting such as CONTRAST in the sample below press the arrow buttons CONTRAST L EXIT 1 BRIGHTNESS 2 4 the c

Service Manual - Michael Jay Lissner

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