Service Manual
Contents
1. I I N CHIP 4 7KOHM 5 1 1017 R478 CHIP 4 7KOHM 5 1 10W R479 R480 R481 CHIP 4 7KOHM 5 1 10W R482 R483 R484 CHIP 4 7KOHM 5 1 10W R485 CHIP 4 7KOHM 5 1 10W R486 CHIP 4 7KOHM 5 1 10W R487 R488 R492 CHIP 4 7KOHM 5 1 10W R493 R709 R710 CHIP 4 7KOHM 5 1 10W R722 287 61L0603513 CHIP 51K R72 288 ______ 61 0603682 CHIP 6 8K OHM 1 107 R4007 11 4 J B 3 O1 No 11 4 BBB 4 CO NIN GO BO NIN gt I 289 610603750 CHIPR 750HM 5 1 10W R436 290 6110603750 CHIPR 750HM 5 1 10W R443 291 6110603750 CHIPR 750HM 5 1 10W R447 2921 6560603100 31 CHIP 10PF 50V NPO C423 293 6560603100 31 CHIP 10PF 50V NPO C427 294 6560603100 31 CHIP 10PF 50V NPO C430 295 6560603100 31 CHIP 10PF 50V NPO C433 296 6560603100 31 CHIP 10PF 50V NPO C446 2971 6500603100 31 CHIP 50V NPO C447 298 6560603102 32 CHIP 1000PF 50 X7R C437 299 6560603102 32 CHIP 1000PF 502. 466 8 30 E Adobe Reader 22 6 6 he Microsoft sts 43 ViewSonic Corporation Internet Explorer Microsoft Input Serial 570000000001 Out ook 12 xdict iB D Micro tord V 59 3 1 486 8 51 5 44 ViewSonic Corporation Sep3 Key the Enter and write the data Suay PERE A B TED Horton ti Internet Ad Explorer D pe L Microsoft utlook Microsoft ford 45 ViewSonic Corporation Sep4 lf ddc program OK and show data compare ok HAJR ik WR VIEW A y Internet Explorer tur er Name Vendor Assigned Code 261C T Mode Serial Number Week of Manufacture 0 Year of 2000 EDID versio 5 dd No of optio 5 EDID 03 Chec 67 data tahle 00 FF FF FF FF FF 00 54 63 1C 26 01 01 O1 01 00 OA 01 03 08 27 1B 78 59 95 A4 57 47 BC 24 15 50 54 BF EF 80 81 80 81 40 71 4F 01 01 01 01 BT 302420 b zt 40 20 70 13 00 52 QE 11 00 00 00 00 00 00 35 54 30 30 30 30 30 30 30 30 30 31 04 00 00 00 FD 00 32 JE 52 md JO
3. OOO ES O IgE 466 67G215S10115K EC 100uF 4507 C903 467 7 67621951015 1000 450PAG450VB100M L 1 909 468 6762155102 EDIOOOUF 167 923 469 16792155102 4K 80100008 25V ______ 0922 470 6762155102 4K EDIOOQUF 25V 0924 471 6762155471 3K LOW EC 470UF 16V C926 472 6762155471 3N 16V KY16VB470M L 8 C926 43 736 25391 L CHOKE BY LI TA L921 414 736 253 91 L 11 1922 4751 736 253 91 LS CHOKE COIL L921 4161 736 253 91 LS CHOKE COIL L922 ce ces 47 uH 10 CHOKE COIL 1201 478 731 174 40 LG LINE FILTER L902 73L174 40 TG LINE FILTER L902 480 731 174 40150 LINE FILTER L902 481 731 174 50 LH LINE FILTER L901 482 731 174 5015 LINE FILTER L901 483 9 800111 30 YS YSTDA500280G PT201 484 80GL17T 30 YS X YSTDA500280G PT202 485 806117731 L FMR PT 004433 3 T901 486 80041731 N 487 876 501 32 5 AC SOCKET 488 936 50460 13 KBP206G 2A 600V DB901 489 936 50460502 BRIDGE KBP206G 2 8007 08901 490 9361100 1052T BA159GPT 00 41 DIODE 1A 0900 491 96061 DIODE 31DQ06FC 0921 492 7 0808014 12 42 HARNESS 10P 12P 100mm CN902 493 7050 780 57112 494 7056 780 57128 osoo ai
4. 08 VDD TCON2IPWM1 DEL R418 1 16 9 13 COUT uie RX2N RX2N 33VPNLOUT R419 Q 1 16W11 106 RXIP R421 2 R422 720 ea x 105 FB404 1K 186 R423 0 1 16W14 SHE S 103 2 3 3V 600 OHM TMDS VCC EO 2 RAA 0 16W15 102 2 WP 5 16 TMDS_GND AR3P 101 5 lt e 8 e m 9 u oe 416 417 RXCN RXCN AG1P Tog gt lt a e 6 AG2N 797 ZX x pu pw AG2P X 8 E RTD2523B RSDS amp LVDS 94 RXEO N o af of AVS0 TXO0 793 RXE0 RXE0 0403 c 3 405 AHSO AG3P TXO0 755 RXE1 l RXEO DECUS AGE EE ADC VDD ACLKN TXO1 51 g 1 5 J eM Lose ADC_GND ACLKP RXE1 5 5 5 7 5 92 9 9 9 80 AB1N 2 g9 AXE2 l RXE2 1 4 5 5 9 emm qe mE 36 RXE2 didi B0 1 2 88 RXEC 22 2 d x 2 L 5000 AB2N 787 xECr RXEC gt O RXE2 278 cag li G0 2 TXOC 84 RXES 90 RXEC 2 S G0 88 HYXE3 20 RXEC
5. 402 3 3V 600 OHM ANMA 43 3V Closed to Scaler C401 403 404 405 406 407 NC XO D 1uF D 1uF 0 1uF D 1uF X401 22uF 16V R40 NC 24 576MHz NC x DGND C402 R1 8DYCC NC A 0 1 16W DEL R405 R406 Closed to Crystal When RTD2333 R403 NC R404 R40 gt R40 3 3V 1 18W NC 0 Otherwise 403 0 R404 NC lt lt 1 8DVCC 401 R1 8DVCC 600 OHM 1 8DVCC gt gt ge Voltage 2 2V if use UF uF Ra 5V the R 25K and 20 Ton 411 c410 412 413 15K 1 16 3 3Vuse 15K and 30K 3 3V 600 OHM D 1uF 10uF 16V O 1uF tuF DGND 1 2 R408 R409 DGND 30K 1 16 415 4 7K 116W TuF m S X x xx 85 00 34888 66666 57 127 66 gt gt 00000 125 33VRST REF 185 vbD 33VRST REF 124 5 126 123 RIE 1169 47K 1 16 aK DPLL_GND RESET OUT 425 MCU RST GND TCON9 PWMO 451 2 APLL_VDD DDCSCL2 VCLK TCON4 25 X PLL TEST TCONO TCON3 DDCSDA2 V7 TCON6 11792 lt PLL TEST2 1 12 SCLK V6 TCON3 RTD SCLK TMDS VCC SCSB V5 1000 7 SCSB R413 5010 3 V4 TCON9 RTD_SD3 SDI NC 5 SDIO 2 V3 TCON5 SDIO2 6 IMDS PWM0 TCON2 SDIO 1 V2 8 SDIO1 41 gt REXT SDIO 0 V1 TCON10 50100
6. 5 1 10W 191 ________61 0603000 192 6110603000 CHIPR 5 1 10W ViewSonic Corporation 52 I I m I I 193 6110603000 CHIPR 5 1 10W R456 194 6110603000 CHIPR 59 1 10W R457 195 6110603000 CHIPR 5 1 10W R713 196 6110603000 CHIPR OOHM 59 1 10W 18 197 6110603101 CHIPR 1000HM 5 1 10W 198 7 61L0603101 199 6110603101 CHIPR 1000HM 5 1 10W 200 61L0603101 CHIPR 1000HM 5 1 10W 201 ______ 61 0603101 2002 6110603101 CHIPR 1000HM 5 1 10W 203 7 61L0603101 204 6110603101 CHIPR 1000HM 5 1 10W 205 6110603101 CHIPR 1000HM 5 1 10W 206 61L0603101 6110603101 CHIPR 1000HM 5 1 10W 208 6110603101 CHIPR 1000HM 5 1 10W 209 6110603101 6110603101 CHIPR 1000HM 5 1 10W 211 16110603101 212 6110603101 CHIPR 1000HM 5 1 10W 213 6110603101 CHIPR 1000HM 5 1 10W 214 7 61L0603101 215 61L0603101 CHIPR 1000HM 5 1 10W 216 1610603101 217 6110603101 61L0603101 CHIPR 1000HM 5 1 10W 219 6110603101 220 61L0603101 CHIPR 1000HM 5 1 10W 221 6110603101 CHIPR 1000HM 5 1 10W 222 6110603101 CHIPR 1000HM
7. Shutdown Protection Output Drive 25 ViewSonic Corporation F A N 7 5 4 7 Internal Bias Comparator Oscillator Dimming Control and Moda Selection Block ViewSonic Corporation 5 Adjust Procedure 5 1 ADJUSTMENT 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 3 ESD protection is needed before adjustment 5 2 MAIN ADJUSTMENTS NO FUNCTIONS DESIGNATION 1 White Balance Function Key 2 Geometry Function Key 5 3 ALIGNMENT PROCEDURES Approximately 30 minutes should be allowed for warm up before proceeding White Balance adjustment 1 Adjust of White Balance 1 How to do the Chroma 7120 MEM Channel setting A Reference to Chroma 7120 user guide Use SC key and NEXT key to modify xyY value and use ID key to modify the TEXT description Following is the procedure to do white balance adjust 2 Setting the color temp You want MEM CHANNEL 9300 color 9300 color temp parameter is Wx 0 283 0 02 Wy 0 298 20 02 Y gt 190 cd m 10 6500 color 6500 color temp parameter is Wx 0 313 0 02 Wy 0 329 0 02 Y gt 260 cd m C MEM CHANNEL 11 5400 color 5400 color temp parameter is Wx 0 335 0 02 Wy 0 350 0 02 Y gt 210
8. D MEM CHANNEL 12 5000 color 5000 color temp parameter is Wx 0 346 0 02 Wy 0 359 0 02 Y gt 210 cd m E MEM CHANNEL13 SRGB color SRGB color temp parameter is Wx 0 313 0 02 Wy 0 329 0 02 Y gt 220 cd m 27 ViewSonic Corporation 3 Into factory mode of VA712b 2 A First Power off then press Switch 2 button along with press Power button will activate the factory mode then MCU will do AUTO LEVEL automatically Meanwhile press MENU the OSD screen will located at LEFT TOP OF PANEL 4 Bias adjustment Set the Contrast D to 70 Adjust the Brightness to 100 5 Gain adjustment Move cursor to and press MENU key A Adjust 9300 color temperature 1 Switch Chroma 7120 to RGB Mode with press button 2 Switch the MEM channel to Channel 9 with up or down arrow on Chroma 7120 3 The LCD indicator on Chroma 7120 will show x 0 283 10 02 y 70 298 10 02 Y gt 250 cd m 4 Adjust the RED of color1 on factory window until chroma 7120 indicator reached the value 100 5 Adjust the GREEN of color1 on factory window until Chroma 7120 indicator reached the value G 100 6 Adjust the BLUE of color1 on factory window until Chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until Chroma 7120 RGB value meet the tolerance 100 5 B Adjust 6500 color temperature 1 Switch the chroma 7120 to RGB Mode with
9. FB702 600 OHM R704 12V R701 1K 1 16W 9 9 10K 1 16 BL ADJ 705 0701 1 16W OUT OUT R R708 NC 1K 1 46W R709 220 1 16W BL ON OFF R710 4 1 16W 0702 5V 711 X BACKLIGHT 3904 0 1uF FB701 711 BONER 600 R712 NC sl 10K 1 16W delete VOL_ADJ R715 R720 C712 3 3V 5V O C715 R716 C714 1uF 16V 0805 R723 10K 1 16W 100uF 25V 10K 1 16W R718 0 1 16W 1 1 AO3401L R722 47 1 16W C720 R724 C718 10uF 16V 10K 1 16W 0 1uF Size Document Number Rev 11 OVVER Date Thursday July28 2005 Sheet 1 of 4 76 ViewSonic Corporation ADC_1 8AVCC RTD_1 8DVCC 11 2 MCU CN404 eid R454 NC 1 2 455 TU m 0 171677 4 Human i U NER AUTO KEY R458 100 1 16W R459 400 16 ENTER KEY R460 100 1716W 2 8 R461 100 ALES ENTER R46 100 146W P BELL 11 12 R4019 100 key i4 OUTR C437 C438 C439 C440 441 C442C443 C45 0 001uF 0 001 0 001 0 001 0 001uF 0 001uF NC 0 001 MCU_VCC N 3 3V 9 DEL 2463 2 43 3V lt MCU BACKLIGHT A PANEL_PW MCU VCC lt _ gt 51100 3 A 5 MCU_RST gt gt gt SDIO1 3 R473 lt SDIO2 3 lt
10. IC201 8 0206 114 7547 3 216 215 216 MLL4148 O 1 10W C215 CN204 0 0 22uF 25V 150KO 1 10W 1 5KO 1 10W CONN D 2 D207 MLL4148 D208 R217 C218 MLL4148 1 10W R218 1uF 25V PMBS3904 R219 68 1 10W 56 1 10W D210 MLL4148 5 R220 1 40 sss D209 220 MLL4148 D212 R223 8221 0 01 MLL4148 1 10W 1 10 5215 GND lt MLL4148 225 R228 10KO 1 10W 1 8W R227 AOC Top Victory Electronics Co Ltd is power GND eMe 10 1 10W MLL4148 itle parco 1 OUTPUT 12V 6 5 V Size Document Number Rev is ignal GND a2 C221 C222 C223 C224 PWPC1742CPV2 P 71 5 1686 sez t 2 0 0022uF 50V ER 0 0022uF 50V L 0 0022uF 50V L 0 0022uF 50V f 1 1 1 1 i Date Monday August 29 2005 Sheet 1 80 ViewSonic Corporation 11 6 A D Power DB901 R920 C920 KBP206G 1 2N 0 0014 500 2 3 D920 FME 210B T901 2 1921 4 12 R903 R906 R909 1000uF 25V T 1000uF 25V 70uF 25V 430 1 8W gt 510 1 8W 100 2W TYPE F R921 C921 470 1 2W 0 001uF 500V C903 7 100uF 450V D900 BA159G C902 0 001uF 250V R904 1 8W R907 510 1 8W D921 D901 310006 UF4003 C926 470uF 16V C901 1000uR 16V 0 001uF 250V R910 C906 2 2
11. 5 al 2 m Al 5 44 Sas 8 8 8 8 8 8 a amp al al r r 2 R430 1 8DVCC NC 3 3V Vd gt VOLUME 7 lt lt 1 8DVCC BRIGHTNESS lt lt 53906 25 1188 ize Document Number ev SCALER s Date Thursday July 28 2005 heet 1 of 4 78 ViewSonic Corporation 11 4 INPUT FB406 30 OHM O OHM R435 p 4 100 1 16W 75 1 16W R437 100 1 16W R438 100 1 16W FB407 30 OHM 3 R439 100 1 16W 75 1 16W R445 100 1 16W C422 0 047uF lt 1 C424 0 047uF lt B1 C425 0 047uF 5061 1M 1 46W FB408 30 OHM R446 C429 100 1 16W 0 047uF ANAMA i R447 C430 75 1 16 10pF R448 C431 100 1 16W 0 047uF VGA R R1 S D401 D402 AVS1 UDZS5 6B UDZS5 6B DEL ZD1 ADD D28 D29 2005 3 28 CN401 DDC DDC SCL DDCSCL 15 VSING VSIN VSIN 14 HSIN HSIN 13 7 GAGND RD RXD RXDI 1 1 8 DDC_SDA lt DDC SDA DDCSDA 12 6 RAGND DB15 ESD solution DGND DGND gt CONNECT DVI POWER DVI DET DDC2 SCL CN402 RX2N 7 DATA2 DATA2 DATA2 4 SHLD DATA4 DATA4 DDC CLK DDC2_SDA DDC DATA D403 UDZS5 6B RXE0 RXE1 RXE2 RXEC RXO0
12. 50500100 00 S6 47 37 32 30 OA 20 20 20 20 20 20 20 00 67 003 BM Adobe vere 8 6 IR vrea SER 8 su 46 ViewSonic Corporation 6 Trouble Shooting Flow Chart START MCU Initialize Main Polling Loop Invalid video Yes Service Invalid Video Mode Meru Input signal Yes service Mo Input Absent Button pressed Service OSD Power Button Pressed Power Off and stop Power butt Pressed oes Power On 47 ViewSonic Corporation 7 Recommended Spare List VA712b 2 list T780KCWHKDV3ABP ViewSonic Universal kusa KEY BOARD _ 4 7 PPWCITA2CPV2P POWER BOARD f ____ 1166054 1 PIN CONNECTOR puede 1 0 8 19941 Foor poron fo 9 11565786 1 BRACKET _ 10 _____1568239 1 Kensington bracket 1l 11808267 1 MAIN FRAM 1966014 1 amp 5 3 gt 2363178709 4A VSC17 LCD FRONT 0 DS 15 2363178709 6A BIRD 1060 E015 006 16 3364942 B FONCTION BUTTON f 17 3264943 1 POWER LENS _ 18 3364944 1 186 LOGO 19 346175042 B BEZEL 3461752 AZ DECO COVER amas sme
13. ViewSonic Corporation Power Block Function AC INPUT Rush B EMI filter b prevention Rectification b Transformer 12V inverter Diode rectifier amp filter ov Starting 1 resistance 52 Switching circuit Feedback control PWM control ICs circul MOSFET ON OFF control Circuit Buck amp DC Royer type LC Current resonance circuit amp control IC circuit Boost circuit E Ballast y CCFL capacitor Lamp DIM control Dimming A control circuit Feedback control circuit 19 ViewSonic Corporation 4 4 INTRODUCTION OF IC RTD2523B LF U401 integrate ADC OSD TMPS RSDS TX LVDS TX convert analog RGB into digital and room and shrink scaling output to LCD panel PIN Function Symbol Crystal OSC output 128 Reference clock input from external crystal from single ended CMOS TTL OSC 3 3V tolerance 50 DDCSCL1 ADC Open drain Internal 75K pull high 110 48 COUT Crystal out TMDS TST TMDS TEST Pin Power on latch for host interface type power 33V 448411 See APLL VDD Power Ion multi ZUM PLL 3 3V 3 PIL TESTI Test ental ocation Serial control I F chip select Open drain AVSO ADC vertical sync input 5V tolerance Power from PIN 13 20 AHSO ADC horizontal sync input Adjustable Schmidt
14. AUPCTSOATAIP AUDIO AI BOARD 97 7 AUPCTSOATSNTP AUDIO SMT BOARD 98 120408 6 THERMAL PAD 99 336801714A WAFERRPLUG CN202 100 56021 Se 101 56661 AMPLIFIER IC E TDAT496L 10201 102 616 602224521 220KOMM 5 1 67 ____ RAZ cO m 103 676 2151097NT 6209 104 ______ 676 2151097NT 1UF 50V 020 105 67021471 3N 470UF 16V 00 106 67G215LA7I 3N 4TOUF 16V 15207 _ 107 67015411 3N 470UF 16V 108 67G215L681 4N 680UP 25V c21 109 67G215L681 4 68006 25V 110 ______886 30214K PHONE PIN CN201 mif 90931 112 AUPCTBOATAIP AUDIO AI BOARD f 13 95 9023 TINCONTEDCOPPER J201 14 950 90 23 TINCOATEDCOPPER 1202 50 ViewSonic Corporation Io 5 5 m 115 956 90 23 TINCOATEDCOPPER J203 956 90 3 TINCOATEDCOPPER J204 117 956 90 23 TINCOATEDCOPPER J205 118 110950 90 3 TINCOATEDCOPPER J206 19 150144 2 506403 PCB 1120 AUPC780A7SMTP AUDIO SMT BOARD ass 121 610603102 CHIPR IKOHM 5 1 10W R207 122 e 61L0603102 CHIPR IKOHM 5 1 10W
15. pu 6 ct 66 ViewSonic Corporation VSCI7 LCD FRONT LOGO FONCTION BUTTON mm 10 4463231502 1 REAR COVER 3461751 KR B MIG 330 4128 5268025 11803 PWPC1742CPV2P PIN CONNECTOR 1166054 1 4 18 016 330 8128 3 ViewSonic Corporation x67 ems 2271 VRSA 1565781 1 29 SRW 0630 847 1 32 VESA RUBBER REAR COVER 34G1751 KR Kensington bracket 37 MAIN SHIELD HARNESS 14 14 50mm 9508014 14 34 39 AUDIO BOARD 43 MYLAR SHIELD 5268025 11804 lt WIRE HARNESS 9568018 30910 45 CLAAT70EA07Q 17 LCD PAN 750GLC70A7Q 12 1 BIRD LOGO 2365178709 33 24 39 36 3 39 40 41 42 43 14 45 46 5 7 Packing For Shipping 68 ViewSonic Corporation Packing Part List wawa emo e a commun memos oes 0 wa COVER 45G 88609 1463783 1 EPS 4463783 2 AUDIO CABLE 89G 173 56 31 EM POWER CORD 89G402A18N LS 8 SIGNAL CABLE 89G 725 902 69 ViewSonic Corporation 9 Disassemble Process 9 1 Units Disassemble Process 9 1 1 Tools Glove Big cross screwdriver omall cross screwdriver Prize equipment or abandoned IC card ocrew box Cushion Six angle sleeve spanner 9 1 2 Disassemble process 1 Tide up worktable spread straight cushion put the m
16. RSI HSCL T RXD P3 0 NCU HSDA1 TXD P3 1 QFP s 26 1 5 P3 3 INTA inde P3 AITO 24 6 6 1 231 IP6 5 XL vl INUL 00 0 Sd 81 61 02 COVE T 9 P d SSAL 191 cOX10 9 4d 21 PIN Function Danean 2 40 PRWDaCewpuGeespupose 10 open dan DA4 P5 4 6 44 PWM DAC output General purpose open drain P5 6 HSCL2 8 2 General purpose SCL2 open drain P5 7 HSDA2 9 3 General purpose Output Slave SCL2 Copen drain RST 10 4 HighActveRESET HSCL1 P3 0 RXD 11 5 Slave clock General purpose VO Rxd open drain P32 NTO 14 8 General purpose l O External interrupt O Standard 8051 D ViewSonic Corporation _P3 3 INT1 15 9 _ General purpose interrupt Standard 8051 P7 7 19 13 General purpose CMOS 60 15 e 43 General purpose l O External Counter Timer2 Standard x 43 SSMO 3 3V power TDA7496L 0201 The UTC 7496 is a stereo 2W 2W class AB power amplifier specially designed for high quality sound TV and Monitor applications Features of the UTC TDA7496L include linear volume control Stand by and mute functions Pin Function GND 1 20 GND GND 2 19 GND GND 3 18 GND INL 4 17 OUTL VAROUT L 5 Vs VOL
17. 23 340175442 B 36521 HNE 25 ______ 106 45760819A _ 26 _______106 459709 1B CARTON LABEL fJ 27 _____106 459709 5A HI POT LABEL FOR 17 LCD 28 1406581 26704 FOR CARTON PALLET 0 01 29 405 58162435A MANUAL P N LABEL 1 05 30 406 581709180 PALLET 0 25 31 406 970709 B 1 32 40G457B709 1 He LABEL 1 33 14065818709 28 BLUE STICKER 2 34 40658 709 8ms STICKER 1 35 4066818709 4A S N LABEL 36 41078017109 6 Jase 1 48 ViewSonic Corporation 37 14463231500 sj 38 14463783 1 2508 39 __ 443783 2 Es 40 4466002 S22 PAPER PLATE fJ 41 466002 523 42 ______1469003210 CORNER PAPER fJ 43 46 7628 V PEBAG 44 456 77 3 TRANSPARENT SHEET 45 456 88606 PE BAG FOR BASE f 46 46807 47 46 88600 B EPECOVER J 48 _ 49 5602 HANDIBI 50 56605 51 556 1150 C BLACK TAE fJ 52 50 1185 MIDDLE FOR CARTON 53 55 118524 APE 54 556 1200 A 55 55 1207 A _ 56 56 1175 s 57 556 1901 A em1 mome 59 5266020 1 PROTECT FIM fJ 60 5268025 11803 MYLAR POWER 61 5268025 11804 MYLAR SHIELD f 62 7 70047070998 MANAL o 63
18. 5 1 10W 223 61603102 CHIPR IKOHM 5 1 101 R421 _ 224 7 61L0603102 CHIPR 1 5 1 10 225 ______ 61 0603103 226 6110603103 CHIPR 10 5 1 10W 227 6150603103 28 6110603103 CHIPR 10KOHM 5 1 10W 229 6110603103 CHIPR 10 5 1 10W 230 6110603103 231 9 q qoq 61L0603103 CHIPR 10 5 1 10W 53 ViewSonic Corporation I I I I 232 6110603103 CHIPR 10 5 1 10W R497 23 6110603103 CHIPR 10 5 1 10W R498 234 61L0603103 CHIPR 10 5 1 10W R701 235 6110603103 CHIPR 10 5 1 10W R705 236 6110603103 CHIPR 10 5 1 10W R706 231 6110603103 CHIPR 10 5 1 10W R707 238 6110603103 CHIPR 10 5 1 10W R708 239 6110603103 CHIPR 10 5 1 10W R712 2400 6110603103 CHIPR 10 5 1 10W R716 6110603103 CHIPR 10 5 1 10W R723 242 61L0603103 CHIPR 10 5 1 10W R724 243 6110603105 CHIPR 1 5 1 10W R440 244 61L0603151 CHIPR 150 OHM 5 1 10W R4001 245 61L0603153 CHIPR 15K OHM 5 1 10W 7 246 610603202 CHIPR 2KOHM 5 1 10W
19. ViewSonic Corporation Do the following to adjust the display setting 1 To display the Main Menu press button 1 MAIN MENU AUTO IMAGE ADJUST X CONTRAST BRIGHTNESS INPUT SELECT AUDIO MENU HT COLOR ADJUST INFORMATION MANUAL IMAGE ADJUST SETUP MENU 39 MEMORY RECALL I1 EXIT 2 SELECT NOTE All OSD menus and adjustment screens disappear automatically after about 15 seconds This is adjustable through the OSD timeout setting in the setup menu 2 select a control to adjust press or Y to A scroll up or down in the Main Menu 3 After the desired control is selected press button 2 A control screen like the one shown below appears command line at the bottom of the control screen tells what to do next from this screen You can toggle between control screens adjust the selected option or exit the screen Contrast Brightness 2 Select 4 the setting press the up V or A down T buttons 5 To save the adjustments and exit the menu press button 1 twice The following tips may help you optimize your display Adjust the computer s graphics card so that it outputs a 1280 x 1024 60Hz video signal to the LCD display Look for instructions on changing the refresh rate in the graphics card s user guide f necessary make small adjustments using H POSITION and V POSITION until the screen image is completely visible The black border around the edge of
20. 10KOHM 5 1 8W R915 61L0805104 CHIPR 100K OHM 5 1 8W R911 524 l 61L0805104 CHIPR 1001 OHM 5 1 8W 9 525 610805152 CHIPR 1 5 5 1 8W R213 526 61L0805152 CHIPR 1 5 5 1 8W R216 527 610805154 CHIP 150KOHM 5 1 8W R215 528 61L0805221 CHIPR 220 OHM 5 1 8W R206 529 6110805223 CHIPR 22K OHM 5 1 8W 0 8211 530 610805240 17 CHIPR 2 4 1 1 8W R929 531 610805242 CHIP 2 4KOHM 1 1 81 R201 532 610805242 CHIP 2 4KOHM 1 1 8W R208 533 610805303 CHIP 30K OHM R221 534 6110805330 27 CHIP 33KOHM 1 8W 1 R926 535 610805333 CHIP 33KOHM 1 1 8W R220 536 610805360 IF CHIP 3 6 1 8W 1 R924 537 61L0805392 CHIP 3 9K OHM 1 10W R928 538 610805471 CHIPR 470 OHM 5 1 8W R210 539 6110805473 CHIPR 47K OHM 5 1 8W R209 540 6110805513 CHIP 51KOHM 1 8W R212 541 6110805563 CHIP 56K OHM 5 1 10W R219 542 61L0805683 CHIPR 68K OHM 59 1 8W R207 543 61L0805683 CHIPR 68K OHM 5 1 8W R218 61 ViewSonic Corporation 544 6080573 98 545 6111206000 CHIPR 00 5 1 4W F902 546 6111206101 CHIP 100 OHM 5 1 4W R917 57 6111206229 CHIP 2 20HM 5 1 8W R910 548 611206334 330K 1 4W R228 549 6111206334 330K 1 4W R900 550 61206334 330K 1 4W R901 551 611206334 330K 1 4W R902 552 61206434 CHIPR 430K 1206 1 4W 5 R903 553
21. 180311 8 L SPEAKER SOM 2 5W 64 ____ 78030 8 R SPEAKER 2 58 65 86921 MAIN SHIELD 66 90195 AUDIO CABLE o 67 7 896 7286AA902 SIGNAL CABLE 68 7 896 728HAA902 SIGNAL CABLE 69 89G1748GAADVI SIGNAL CABLE 89G1748HAADVI SIGNAL 71 7 89G1748LAADVI SIGNAL CABLE 72 896402418N IS POWER CABLE 73 89G402A18N LS JPOWERCOD 74 9508014 14 34 HARNESS 14P 14P b mm 75 195680 16926 WIRE HARNESS 49 ViewSonic Corporation 0 018 0 018 0 071 173 PR gt gt jm 1 01 O N 76 9568018 30910 WIRE HARNESS M16 4128 SR 78 ___ MIG 330 4128 SRE 9 MIGII40 6128 80 _____ MIGIT30 6128 50880 81 ____ 1141730 6128 ___ 82 1 161730 6128 83 __ MIGIT40 12120 84 QIG 130 6120 85 05088 SCREW 86 016 330 8128 87 ___ QIG 330 10 47 SCREW 88 9161030 8128 89 9161040 10128 SCREW 90 T5OGLCTOATQ 12 CLAAITOEAOTQ 17 LCD PAN 750GLC70A7Q 13 CLAAL70EAO7Q 17 LCD T50GLC70A7Q 22 7088070 17 LCD PAN 750GLC70A7Q 23 CLAAL70EAO7Q 17 LCD PAN 94 _____ 4463783709 IA ___ CARTON 95 AUDIO BOARD 96
22. 61L1206434 CHIPR 430K 1206 1 4W 5 R904 554 611206434 CHIPR 430K 1206 1 4W 5 905 555 611206514 CHIPR 510KOHM 5 1 4W R906 556 611206514 CHIPR 510KOHM 59 1 4W R907 557 6111206514 CHIPR 510KOHM 5 1 4W R908 558 6560805102 31 1000PF 50V NPO C209 559 7 650080510322 CHIP 0 01UF 25V X7R 0805 C220 560 6560805104 22 CHP O 1UF 25VX7R 0805 C201 561 6560805104 22 CHIP 0 25VX7R 0805 C203 562 6560805104 22 CHP O 1UF 25VX7R 0805 C204 563 7 650080510422 CHIP 0 1UF 25VX7R 0805 C206 564 6560805104 22 CHIP 0 1UF 25VX7R 0805 C208 565 6560805104 22 CHIP O 1UF 25VX7R 0805 C213 566 7 650080510422 0 25VX7R 0805 C908 567 ______6560805104 32 CHIP 0 50 X7R 0805 C905 568 7 650080510422 CHIP 0 507 X7R 0805 C927 569 650080510422 CHIP 0 507 X7R 0805 990 570 6560805104 32 CHIP 0 1UF 50V X7R 0805 C931 971 6560805105 22 CHIP 25 0805 C217 572 7 6560805105 22 CHIP 25V XTR 0805 C218 573 6500805221 22 CHIP 220PF 25V X7R 0805 C907 574 6560805222 32 2200PF 50V 0805 X7R C221 575 06500805222 32 2200PF 50V 0805 XTR C222 576 6560805222 32 2200PF 50V 0805 X7R C223 577 6560805222 32 2200PF 50V 0805 X7R C224 578 6560805223 22 C934 579 6560805224 22 C207 580 6560805224 22 C21
23. R208 123 6110603183 CHIP 18K OHM 1 10W R201 124 61L0603183 CHIP 18K OHM 1 10W R203 125 61L0603203 CHIPR 20KOHM 5 1 10W R210 126 6110603203 CHIPR 20 5 1 10W R211 127 610603204 200K 0603 R202 128 9 6500805101 31 CHIP 100PF 50V NPD 0805 C211 1291 6500805101 31 CHIP 100PF 50V NPD 0805 C212 130 16560805104 326360 DHIP 0 50V X7R C203 131 6560805104 326360 DHIP 0 50V 8 C213 132 6560805474 226213 CHEP 0 47UF 25V X7R 080 C204 133 6560805474 226213 CHEP 0 47UF 25V X7R 080 C206 134 CBPC780KCWV3P CONVERSION BOARD i 135 841078010113 MAIN BOARD 136 7 336801714A VAFEREPLUG 01702 137 13368017244 H 24 2 0MM RIGHT ANGL 138 13368027 12 WAFER 2 6P 2 CN701 139 3308027 16 WAFER 16PIN 2 0MM DIP CN404 140 406 4576241258 CBPC LABEL 141 4403231508512 142 4403231508513 Ste 1441 15106002 1 881 144 6762151101 4N LOW ESR 1000 25V NCC C701 145 676215101 4N LOW ESR EC 100UF 25V NCC 146 6762151101 4N LOW ESR 100UF 25V NCC C706 147 6762151101 4N LOW ESR 100UF 25V NCC 0719 148 1676215221 4N 220UF 25V 149 676309 100 Electrolytic CAP 1040 _ 150 66309100 3 Electrolytic CAP C418 151 676309V100 3 Electrolytic CAP 6720 152 676309 220 3 2208
24. T RLZ5 1B ROHM 70922 620 936 395 38 T PTZ9 1B ROHM 70920 621 9 936 395 40 T RLZ13B ROHM ZD921 ViewSonic Corporation 63 1 I 21 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 622 19363004 4 DIODE RBO50L 40 623 936304 4 DIODE RBO50L 40 ______ 0204 624 7 PWITA2CPV2AIP POWER BOARD FOR AL 620 63592 1 5MMRIVET fJ 626 56015810 T IC AZA31AZ AEI TO 92 ___ 10903 627 56015810 T IC AZA3IAZ AEI 7092 628 ______566 158 12 KIA431A AT P TO 92 IC __ 10903 620 566 158 12 KIA431A AT P 10 92 IC 60 616 17210052T 100HM 5 1 4W 1 SKOHM 5 1 4W 631 1616 17218252T 62 616 17218252T 633 616 17218252T 634 616 17218252T 635 616 17222152T 636 616 20747052T 637 616 20747052T 638 656 11152 1500PF 10 IKV YP 1 SKOHM 59 1 4W R203 1 8 5 1 4W 1 8 5 1 4W 69 1650 1815211 GP 1 5NP IKV 25F 10 C904 640 656517 102 5T 1000PF 10 5 500V C920 641 2 L LLCGGB17K102 5T 1000PF 10 Y5P 500V C921 642 67G 2152207NT 22UF 50V C906 643 67G 2152207RT 22UF 20 50V C906 644 846 56 FUSE 2A 250V BY WICKMANN F901 oct Dione 646 956 9023 647 7 950 9023 648 950 9023 649 7 950 9023 650 956 90
25. X7R C438 300 7 6560603102 32 CHIP 1000PF 50 X7R C439 31 6560603102 32 CHIP 1000PF 50 X7R C440 302 6560603102 32 CHIP 1000PF 50 X7R 441 303 6560603102 32 CHIP 1000PF 50 X7R C442 34 6560603102 32 CHIP 1000PF 50 X7R C451 305 6560603104 32 CHIP 0 50V X7R C403 3061 6560603104 32 CHIP 0 10 50V X7R C404 307 6560603104 32 CHIP 0 1UF 50V 8 C405 16560603104 32 CHIP 0 50V X7R C407 309 6560603104 32 CHIP 0 50V X7R C408 CO ViewSonic Corporation 310 _______6560603104 32 CHP 0 50V C409 311 6560603104 32 CHP O 1UF SOV XR 312 6560603104 32 CHIP 0 50V XR C412 313 6500603104 32 CHP 0 1UF 50V XR 6413 314 6560603104 32 CHP 0 50V XR C414 315 6560603104 32 CHP 0 1UF 50V 0415 316 6560603104 32 CHP 0 1UF 50V XR C416 317 6800603104 32 CHIP 0 50V 0417 318 7 6560603104 32 CHP 0 1UF 50V XR 019 319 6560603104 32 CHP 0 50V XTR C420 320 7 65606034232 CHIP 0 1UF 50V XR C421 321 6560603104 32 CHP 0 1UF 50V XTR C448 322 7 6560603104 32 CHP 0 1UF 50V XTR C449 323 6560603104 32 CHP 0 50V XR C450 134 6560603104 32 CHP 0 50V XR C452 325 ______ 6560603104 32 CHP 0 1UF 50V XR C453 326 7 6560603104 3
26. lt gt SD3 SDI 3 470 1 16W R D SCSB R4023 R47 2 RTD SCLK 0404 MCU_VCC C445 PMBS3906 A B NC DEL VOLUME 2 ayo 490 444 8474 8475 496 8494 2 0 P5 0 DA0 fy R489 E Ee 10K 1 16 ENTER KEY P5 2 DA2 33 MCU_VCC MCU_VCC 1 A RUNE Ip 2 4 1 32 4 uw HSCLZ2 P5 6 470 1 16W 249 4 1 16W 14 MTV512 DDC WP R495 4 7K 1 16W R49 100 1 16W SNTI 29 OUT R498 5 R499 100 1716W P6 5 10K 1 16W Esc IICSDA AUTO REC P3 5 T1 P7 6 CLKO P6 3 AD3 DVI DET 777791 bns R4004 LW 19 77 P6 2 AD2 28 R4 100 P6 1 AD1 STDBY DDC_SDA R400 100 1 16 csr ubarrxe3 2 9 oP6 0 ADO 24 MUTE LED GREEN lt SN 84004 100 1 16W 8 HCL1 RX P3 k ra Ru 2400 100 4 46W i Siemens MCU_VCC MCU_VCC 4007 5V 6 8K 1 16W O C446 C447 10 10 IICSCL SCL NC IICSDA SDA VSS 24 16 gt gt EDID_WP R4024 10K 1 16W EDID WP EDID WP DDC SCL DDC2 SCL 8 100 1w SDA DDC2 SDA 71511675 M Date Thursday July 28 2005 Sheet Document Number ViewSonic Corporation 11 3 Scaler
27. press button 2 Switch the MEM channel to Channel 10 with up or down arrow on Chroma 7120 3 The LCD indicator on Chroma 7120 will show x 0 313 0 02 y 0 329 0 02 Y gt 260 cd m 4 Adjust the RED of color3 on factory window until Chroma 7120 indicator reached the value R 100 5 Adjust the GREEN of color3 on factory window until Chroma 7120 indicator reached the value G 100 6 Adjust the BLUE of color3 on factory window until Chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until Chroma 7120 RGB value meet the tolerance 100 5 28 ViewSonic Corporation C Adjust 5400 color temperature 1 Switch the chroma 120 to RGB Mode with press MODE button 2 Switch the MEM channel to Channel 11 with up or down arrow on Chroma 7120 3 The LCD indicator on Chroma 7120 will show x 0 335 10 02 y 0 350 0 02 Y gt 210 cd m 4 Adjust the RED of color3 on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN of color3 on factory window until Chroma 7120 indicator reached the value G 100 6 Adjust the BLUE of color3 on factory window until Chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until Chroma 7120 RGB value meet the tolerance 100 5 D Adjust 5000 color temperature 1 Switch the chroma 7120 to RGB Mode with press button 2 S
28. the screen should barely touch the illuminated active area of the LCD display 42 ViewSonic Corporation Main Menu Controls Adjust the menu items shown below by using the up and down Y buttons Explanation Auto Image Adjust sizes and centers the screen image automatically Contrast adjusts the difference between the image background black level and the foreground white level Brightness adjusts background black level of the screen image Input Select allows the user to toggle between an analog and a digital signal Input Select 2 Select Audio Adjust Volume increases the volume decreases the volume and mutes the audio Mute temporarily silences audio output Color Adjust provides several color adjustment modes including preset color temperatures and a User Color mode which allows independent adjustment of red R green G and blue B The factory setting for this product is 6500K 6500 Kelvin 9300K 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 5400K Adds green to the screen image for a darker color 5000K Adds blue and green to the screen image for a darker color User Color Individual adjustments for red R green G and blue B 1 To select color R G or B press button 2 2 To adjust selected color press Y and A Important If you select RECAL
29. trigger 5V tolerance Power from PIN 13 AIC1084 33PM U701 DC power convert used to 5v convert 3 3v 20 ViewSonic Corporation MTV512GMV64 U402 The MTV512M micro controller is an 8051 CPU core embedded device especially tailored for flat panel display applications It includes an 8051 CPU core 768 byte SRAM 4 channels of 6 bit ADC 3 external counters timers 6 channels of PWM DAC DDC interface and a 64K byte internal program Flash ROM memory Circuit Diagram G Sd VO F 50 290 LIL VO 0 5 090 LION 1213 0 14 14 Ld OFE bd DA5 P5 5L1 7 P5 6 HSCL2 8 38 1 5 P5 HSDA2 9 3 L P1 6 RSTO 10 1 7 HSCL1 RXD P3 00 11 MTV512MV 35 NC NCL 12 44 pin 34 NC HSDA1 TXD P3 1L 13 PLCC 33 NC P3 2 INTOL 14 32 1VSYNC P3 3MIMTT 15 31 1 6 7 P3 A TO 16 30 JP6 6 CL KO P3 5 T1L 17 29 5 COM 12 9 89 61 XL 106 SSAL 122 Odv 0 9dL 941 Ge 92 5097 8 112 9d 82 21 ViewSonic Corporation EFE 162 50 2900 52 190 10 84 0 ION Le 1613 0 ld IL 1218 1614 O ppl P Sd Pv JIPT 4 32 JP1 5 31 JP1 6 30 JP1 7 MTV512MF E 44 pin 2 NC DA5 P5 5L P5 6 HSCL2 P5 r HSDA2
30. 0 1 8W C905 R905 22uF 50V 0 1uF 50V 430KQ R908 510 1 8 Z IC901 LD7552 R912 Q900 00 2SK2645 54MR C900 0 47uF 250V C932 Q NAQ 0 0022uF 250V R922 R901 330 1 8W C907 2200 1 4W 220PF 25V R916 ZD921 RLZ5 1B7 R923 2 R924 R915 0 330 2W RLZ13B 1 10W 1 10W R902 830 1 8W 330KQ 1 8W gt NR901 NTCR NU D922 o MLL4148 t C934 5 VAR901 NC 0 022uF 25V R925 1 1 10W R917 1000 1 8W F901 R918 C930 FUSE 75KQ 1 10W x 0 1uF 50V R927 IC903 1 1 10W 0 KIA431A AT P R928 220 431 3 9 1 10W C908 R919 0 1uF 25V 100KQ 1 10W O SW901 N R929 N sw x Wf 1 CN901 SOCKET 81 ViewSonic Corporation F902 00 1 8W 12V 20920 PTZ9 1B gt 5 3 6 1 10W 1 R926 1 10W 1 CN903 CONN C931 0 1uF 50V 2 4 1 10W 190 Document Number PWPC1742CPV2P 715G1686 Monday August 29 2005 heet 1 11 7 Audio OUT L CN202 pin header2 7 2mm female MUTE CN204 C202 3 680uF 25V 680 25 555 NC U201 7 V VOLUME TDA7496L GND GND CN201 C205 1 8 5 R201 48K 1 16 17 3 pi OUTR R203 18K R212 20 470uF 16V C207 PHONEJACK 200 7 5 2207 R208 V GND R211 x x C211 C212 4 C209 210 C213 100pF 100pF 1 0u 1 0u 0 1uF C208 470uF 16V ViewSonic Corporation V V GND GND GND ize Document Number Re
31. 2 POWER BOARD F o 416 PW1742CPV2SMTP POWER BOARD FOR SMT 417 906005 1 PIN FOOT 1901 418 1568268 1 AC LOCK 49 3368021 2 U CON 2PR A CN201 420 2 3368021 2D U CON 2PR A CN202 421 3368021 2D U CON 2PR A CN203 422 3368021 2D U CON 2PR A CN204 423 3308021 2D AC WAFER CN201 424 3308021 2D AC WAFER CN202 42b 3368021 2D AC WAFER CN203 426 3368021 2D AC WAFER CN204 58 ViewSonic Corporation PR 420 9 406 45762412B CBPC LABEL NEN 428 56 6 4503 RIV fi NEN 429 1566 139 PC123Y22FZ0F 1C902 430 566 139 3B PC123Y82FZ0F 1C902 4341 576 417 11 51031 0 Q206 432 9 57G 417 11 51031 0 0207 4d33 9 1576761 7 TRANSISTOR KTD1691 P 0206 44 576 761 7 TRANSISTOR KTD1691 P 0207 435 _____ 576 763 12 AOUAOIL TO 251_ 90 46 57016313 A0417 TO251 3 ____ 0201 437 58080 WT NR NR 438 7 16101520338 64 0 33 OHM 5 2W 430 636 107474 HS X2 CAP C900 440 ______636 10747418 0 47UP 10 250VAC C900 441 6362107334282 0 33uP 250V PMS TAIYANG C21 442 ______ 6362114334 AB 0 33UF 5 160V 443 656 3J1206EM 5 SL MURATA C205 44
32. 2 CHP 0 50V XR C454 327 6560603104 32 CHP 0 1UF 50V XR C455 328 6560603104 32 CHP 0 1UF 50V XIR C456 329 6560603104 32 CHP 0 1UF 50V C457 330 _______6560603104 32 CHP 0 1UF 50V XIR 0458 131 7 650060310422 CHP 0 1UF 50V XR C459 332 6560603104 32 CHP 0 50V C460 333 6560603104 32 CHIP 0 50V XR C704 154 6560603104 32 CHP 0 1UF 50V XR C705 335 6560603104 32 CHP 0 1UF 50V XR C707 336 6560603104 32 CHP 0 1UF 50V XR C709 337 7 6560603104 32 CHP 0 1UF 50V ____ 338 6560603104 32 CHIP 0 1UF 50V XR CTI CO C2 4 BB 4 6560603473 32 344 6560603473 32 345 6560603473 32 346 6560603473 32 341 6560603473 32 348 6560603473 32 Qo ViewSonic Corporation 6560603104 32 CHIP 0 1UF 501 XR 01156 _______ 6560603104 32 CHIP 0 1UF 50V XR CTT 65606083104 32 CHIP 0 1UF 50V XR 01186 6060603220 32 Chip Cap 22PF 0432 NENNEN 56 I 349 6560603473 32 CHIP 47NF 50V X7R C431 350 6560805105 12 CHIP CAPACITOR 1UF 16V X C70
33. 2 Specification 3 Front Panel Control and Indicators 4 Circuit Description 5 Adjust Procedure 6 Troubleshooting Flow Chat 1 0 7 Recommended Spare Parts List 8 Exploded Diagram And Spare Parts List 9 Block Diagram 10 Schematic Diagram 11 PCB Layout Diagram B Are you satisfied with the VA712b 2 Service Manual 1 Service Manual Content 2 Service Manual Layout 3 form and listing Do you have any opinion and suggestion about this Service Manual Reader s Basic Data nm me Company _ m _ E Mail After completing this form please return it to ViewSonic Quality Assurance in the USA at facsimile 1 909 839 7943 You may also e mail any suggestion to the Director Quality System amp Process marc maupin viewsonic com 91 ViewSonic Corporation
34. 20 16V 153 886 35315F H D SUB 15PIN NAO 51 ViewSonic Corporation 0 2 114 886 35315F HJ D SUB 15PIN CN401 155 35424F H DVID CONN 24P FEMALE 90 CN402 156 19066250 1 GP EM 1571 936 22 45 CRYSTAL 24MHz HC 49US X402 158 AIC780KCWV3P MAIN BOARD 159 40G 451624 1B CPU LABEL ss 160 ______ 566 562116 RTD2523B LF PQFP 128 0401 161 566 563 7 AIC1084 33PM TO 263 0701 162 5661125543CA3 MTV512MV PLCC 44 MYSON 0402 163 5661133 34 164 5661133 34 165 5661133 56 166 56417 4 168 5G 417 4 169 56417 4 wo 50417 6 11 56417 6 M24C02 WMNOTP M24C02 WMNOTP M24C16 WMN6TP 172 1 PZT2907A SOT 223 Q403 173 55631 AOL 703 1221 1 CHIPR 5 1 10 175 ______ 610603000 610603000 CHIPR 5 1 10W 77 1610603000 178 61L0603000 179 6110603000 CHIPR 5 1 10W 180 61L0603000 181 61L0603000 CHIPR OOHM 5 1 10W 182 61L0603000 CHIPR 5 1 10W 183 _______ 610603000 184 6110603000 CHIPR 5 1 10W 185 610603000 186 16150603000 187 610603000 CHIPR OOHM 5 1 10W 188 1610603000 189 6110603000 CHIPR OOHM 5 1 10W 190 6110603000 CHIPR
35. 23 651 7 950 9023 652 7 950 9023 653 7 950 9023 654 956 90 23 655 7 950 9023 656 956 9023 657 7 950 9023 658 7 950 9023 659 7 950 9023 660 956 9023 ViewSonic Corporation 64 661 956 9023 662 950 9023 663 _____ 956 90 23 664 7 950 9023 665 956 9023 666 956 9023 667 956 9023 668 956 90 23 669 950 9023 670 950 90 23 671 956 9023 62 11501688 F PB 673 7056 780 57112 era 10520580 icon Roos er ses 29 6 TU 1066 Ferr si z 1 ers 51 667 30 25K2645 84MR TO 220F aso 56 724 11 STP9NK65ZFP TO 220FP WOS 4000 umo sus 1 0 066 75057035 516200 1 9066264 1 SIC 936 60238 10006 10A 1501 201101565920 ress 96 60239 DIODE 21 10 20 090 Fer sus 7 ViewSonic Corporation 65 8 Exploded Diagram And Spare Parts List EN i le fe X lt d
36. 33P BAV99 50 23 D413 383 936 6433P BAV99 SOT 23 0414 3841 936 395 34 T ZENER DIODE 00755 6B D401 385 936 395 34 T ZENER DIODE 00755 6B 0402 3861 1936 395 34 T ZENER DIODE 00255 6B D403 387 936 395 34 T ZENER DIODE 00755 6B 0415 57 ViewSonic Corporation 388 936 395 34 T ZENER DIODE 00255 68 0416 380 936 395 34 T 7ENER DIODE UDZS5 6B 390 _______ 936 395 34 T ZENER DIODE 00255 6B 391 936 395 34 T 7ENER DIODE 00255 68 D419 392 936 395 34 T ZENER DIODE 00755 6B 393 936 395 34 T ZENER DIODE UDZS5 6B _ D421 394 936 395 34 T 7ENER DIODE 00755 6B 395 9361004 4 SCHOTTKY DIODE 1A 407 SM 0701 396 900015 480 TOD 397 171561675 CUI PCB BOARD _ 308 KEPCTSOKEIP KEY o 399 7 KBPCTSOKEISMTP KEPC BOND o o 400 3363802 2H WAFTER CN002 401 3363802 29 WAFTER CN003 402 9 1336801712A H PIN HEADER 2 6 CN006 403 1776 600 160 SOO 404 776 600 100 SOD 405 776 600 160 SOO 406 776 600 100 SOA 407 1776 600 160 50005 408 776 600 160 8006 409 86G 12 1 GP LED GP32032ME R003 50 ZY 410 956 90 23 TINCOATEDCOPPER 1001 411l KEPC780KE1SMT BOARD 4121 61L0805000 Chip Resistors FB001 413 6110805000 Chip Resistors FB002 414 71501600 D KEPC MEN 415 _ 174
37. 4 ______656 3J1206EM ____ 12 5 SL MURATA C210 445 7 650 3J1206EM 5 SL MURATA C214 446 656 3J1206EM 12PF 5 SL MURATA C215 441 _____656 3J1206ET 12PF 5 SL 448 _____656 3J1206ET 12PF 5 SL TDK 449 _____656 3J1206ET 12PF 5 SL 450 ______656 3 1206 12PF 58 SL 451 68030510228 1000PP Y2 400 20 BY JN 452 7 65090801028 1000PP Y2 4007 20 BY JN 453 7 68030510228 100PF Y2 250V 20 BY MUR C90 454 7 656305M1022BM IOOPF Y2 2507 20 BY MUR 455 65G305M1022pP 2 1000 M 250VAC COOL 456 _______ 656305 10228 2 1000PF M 250VAC C902 457 7 650306422228 GP 2200 20 2507 AC C932 458 7 65630682222BP 2200PP 400 20 BY UK C032 459 7 6702150471 4K LOW ESR EC 470UF 25V 0202 460 7 65702150471 EC 47OUF 25V C025 461 6762151102 3N 6 000 1 10 20 C023 462 676215102 4N LOW 1000UF 257 0922 463 7 16702151102 4N ____ LOW 1000UF 257 C924 464 ______6702151471 4N 470UF25V KY25VBA70 M L 1 202 465 ______ 6762151471 4N 470UF25V KY25VBATO M L 1 C025 59 ViewSonic Corporation l CO eS
38. 6 581 6560805472 32 4700PF 50V C212 582 6560805473 32 SMD 47NF 10 50V C219 62 ViewSonic Corporation I I I I 5831 936 60264 B340A 00 214 D201 584 936 60264 B340A 20 6 D204 585 936 64325 586 936 64325 5871 9360 64325 588 936 64325 589 936 64325 590 936 64325 591 936 64325 592 0930 64325 5931 9360 64325 594 936 64325 595 936 64325 596 936 64325 597 0930 64325 598 936 64325 599 936 64325 600 7 936 64325 6011 936 64325 6021 936 6432V DIODE LL4148 0508 D202 603 936 6432V DIODE 114148 6508 D203 6041 936 6432V DIODE LL4148 0508 D205 605 936 6432V DIODE LL4148 6508 D206 6061 936 6432V DIODE LL4148 0508 D207 6071 936 6432V DIODE 114148 6508 D208 6081 936 6432V DIODE 114148 6508 D209 609 936 6432V DIODE 114148 6508 D210 610 936 6432V DIODE 114148 8 D211 6l1 936 6432V DIODE 114148 6508 D212 6121 936 6432V DIODE 114148 6508 D213 63 936 6432V DIODE 114148 6508 214 614 936 6432V DIODE 114148 6508 D215 615 1930 6432V DIODE LL4148 6508 D216 616 936 6432V DIODE 114148 6508 D217 617 936 6432V DIODE 114148 8 D922 618 936 6432V DIODE 114148 6508 D923 69 936 395 25
39. 8 351 6560805105 12 CHIP CAPACITOR 16V X C714 352 716 567601 2 0X1 2 100M 6000HM 28401 353 716 567601 2 0X1 2 100 6000 FB402 354 716 567601 2 0X1 2 100 6000 FB403 355 716 567601 2 0X1 2 100M 6000HM FB404 356 716 567601 2 0X1 2 100 6000 FB405 0357 716 567601 2 0X1 2 100M 6000HM FB701 358 716 567601 2 0X1 2 100M 6000HM FB702 359 716 567601 2 0X1 2 100 6000 FB703 360 567601 M CHIP BEAD 0805 6000HM 401 361 716 567601 M CHIP BEAD 0805 6000HM FB402 362 716 567601 M CHIP BEAD 0805 6000HM FB403 363 716 567601 M CHIP BEAD 0805 6000HM FB404 364 567601 M CHIP BEAD 0805 6000HM FB405 365 716 567601 M CHIP BEAD 0805 6000HM 28701 366 716 567601 M CHIP BEAD 0805 6000HM 702 367 567601 M CHIP BEAD 0805 6000HM 28703 38 716 59C300 0 8X1 6 100M 300HM FB406 369 716 59C300 0 8X1 6 100M 300HM FB407 370 71G 59C300 0 8X1 6 100M 300HM 408 3 4 936 6442 P BAV70 DIODE D423 372 996 6442 P BAV70 DIODE D424 3 3 936 6433P BAV99 SOT 23 D404 374 936 6433P BAV99 SOT 23 D405 375 936 6433P BAV99 SOT 23 D406 376 9396 6433P BAV99 50 23 D407 371 936 BAV99 SOT 23 D408 378 936 6433P BAV99 SOT 23 D409 379 936 6433P BAV99 SOT 23 D410 380 930 6433P BAV99 SOT 23 D411 381 936 6433P BAV99 SOT 23 D412 382 930 64
40. Aur 0 RO TXO3 E RES SS RXE3 E PLL GND 8 gt 34 1 RO 4 5 0 33 AVS VCLK 0 82 RXOO 2 BRIN TXEO 781 RXO0 5 a 32 RXE3 B1 B1 V7 BR1P 785 RXO1 RXO0 AHS V0 TXO3 B1 B1 V6 BRIN TXE1 79 RxXO1F 22 RXO1 a 31 TEM G1 G1 V5 BR2P TXE1 78 22 RXO1 B V1 G1 G1 V4 BR3N 2 22 RXO2 81 7 NC RTD2023L 30 RXO0 5061 5061 V3 55 TXE2 7 RXO2 B V2 pe R1 R1 V2 BG1N DEC 2 A RXOC Gis eae R1 R1 V1 9 88 BG1P 52 Rx53 RXOC 8 peo 28 Har ADC_GND 55 Ss tog BG2N TXE3 Rxo3 22 G1 9 58 RXO1 ADC VDD 00 666659 22 TM sed TXE3 G V4 De AHS1 VO 00006 00 2 3061 9 9 RXO1 AVS1 AVS1 VCLK 22 99 33333266558 10 soc vs 9 9 per Z ROY see R1 T 88 RXO2 990 555545 zg m Z 2 2 2 2 R V6 5 TXE2 88 52255033 55590000090 R1 12 5 5 25 RXO2 aa 000000 amp m m m m m m 8 m 63 8 6 2 F v 282 89 x S o 35 885 5 BES EEF 5 5 22 5008 54854688 lt gt 5 amp m gt DDC gt oo e s al 5 5 DDC SDA Y R428 1 18WDDCSDA1 7
41. L from the Main Menu when the product is set to a Preset Timing Mode colors return to the 6500K factory preset 13 ViewSonic Corporation Information displays the timing mode video signal input coming from the graphics card in the computer the LCD model number the serial number and the ViewSonic website URL See your graphics card user guide for Instructions on changing the resolution and refresh rate vertical frequency NOTE VESA 1280 x 1024 60Hz recommended means that the resolution is 1280 x 1024 and the refresh rate is 60 Hertz Information H Frequency XX V Frequency XX Hz Resolution XXX MHz Pixel Clock XXXXXXXXX Serial Number XXXXXXXXXXX Model Number XXXXXXXXXXX www ViewSonic com 1 Exit Manual Image Adjust Sub menu Manual Image Adjust H V Position Fine Tune 2 Select Sharpness H Size Horizontal Size adjusts the width of the screen image Position Horizontal Vertical Position moves the screen image left or right and up or down H V Position 2 Select Fine Tune sharpens the focus by aligning text and or graphics with pixel boundaries NOTE Try Auto Image Adjust first Sharpness adjusts the clarity and focus of the screen image 14 ViewSonic Corporation Setup Menu displays the menu shown below Setup Menu Resolution Notice OSD Position OSD Time Out OSD Background On Off 2 Select Language Select allows the user to choose the language us
42. PIN CONNECTOR Horizontal Composite Vertical sync SCL SIGNAL LEVEL CONNECTOR SIGNAL DESCRIPTION Tvp p VIDEO 0 7vp p VIDEO 0 ViewSonic Corporation DVI D 24 PIN CONNECTOR Reserved 5 Reserved No connection DDC CLK DDC2B Clock DDC DAT DDC2B Data Reserved No connection TMDS negative differential input channel 1 TMDS positive differential input channel 1 11 Logic Ground 12 6 2 7 5 x gt T T 24 TMDS negative differential input reference clock 10 ViewSonic Corporation 3 MAIN MENU AUTO IMAGE ADJUST rr N CONTRAST BRIGHTNESS INPUT SELECT i AUDIO MENU HI COLOR ADJUST INFORMATION MANUAL IMAGE ADJUST 7 SETUP MENU 7 MEMORY RECALL Displays the Main or exits the control screen and saves adjustments Audio button turns the sound off Front Panel Function Controls And Indicators Main Menu with OSD controls Front Control Panel shown below in detail scrolls through menu options and adjusts the displayed control Also a shortcut to display the Contrast adjustment control screen Displays the control screen for the highlighted control Also toggles between two controls on some screens Also a shortcut to toggle analog and digital connection Power light Green ON Orange Power Saving standby Power On Off
43. R441 241 61L0603202 CHIPR 2KOHM 5 1 10W R452 2481 610603202 CHIPR 2KOHM 5 1 10W R453 249 6110603223 CHIPR 22K OHM 5 1 10W R4016 250 61L0603303 CHIP 30K OHM 5 1 10W R409 251 610603332 CHIP 3 3K OHM 1 10W R444 252 6060341 7 CHIPR 4700HM 5 1 10W 253 6106034 4700HM 5 1 10W 254 7 6 060472 CHIP 4 5 1 100 255 61L0603472 CHIP 4 7KOHM 5 1 10W R4010 256 61L0603472 CHIP 4 5 1 10W R4011 257 6100603479 4 5 1 10W 258 7 610603412 CHIP 4 5 1 108 R4022 259 61L0603472 CHIP 4 7KOHM 5 1 108 R4023 260 61L0603472 CHIP 4 7KOHM 5 1 10W 261 61106083472 CHIP 4 5 1 10W 262 gt 6110603472 CHIP 4 7 5 1 10W 263 7 61L0603472 CHIP 4 7KOHM gt 5 1 107 R410 264 7 61L0603472 CHIP 4 5 1 10W R411 265 61L0603472 CHIP 4 5 1 10W 266 _____ 61L0603472 CHIP 4 7KOHM 5 1 101 R464 267 61L0603472 CHIP 4 5 1 108 R465 268 6110603472 CHIP 4 7 5 1 10W 269 60603412 CHIP 4 5 1 10W 270 610603472 CHIP 4 7KOHM 5 1 10W 54 ViewSonic Corporation I I
44. RXO1 RXO2 RXOC RXO3 A VSHNC DATA1 1 DATA1 BUS_POWER lt lt DATA1 3 SHLD DATA3 DATA3 5v GND H PLUG DET DATAO DATAO DATAO 5 SHLD R444 DATAS5 DATA5 3 3K 1 16W RXCP RXCP T RXCN RXCN A RED A GREEN A BLUE A HSYNC C5 A GND DVI CON SHIELD connect to Chassis Then Chassis connect to DGND CN403 CONN R4012 panel interface O RXE0 RXE1 RXE2 RXEC RXE3 RXO0 RXO1 RXO2 RXOC RXO3 lt lt PANEL POWER ESD solution 0415 UDZS5 6B 0416 UDZS5 6B DGND DDC VDD DGND DDC p p DDC SCL 0417 UDZS5 6B D418 UDZS5 6B DGND 5 DDC_SDA 0419 UDZS5 6B 0420 UDZS5 6B DDC2_SCL ViewSonic Corporation DGND RXD ESD solution P TXD DGND P 0421 UDZS5 6B 0422 UDZS5 6B DGND DDC2 SDA 79 Document N umber Thursday July 28 2005 11 5 Inverter L201 TP1 TP2 Pm HVO HVO Q202 R202 R204 R205 CN201 144 8KO 1 4 1 8KO 1 2W1 8KO 1 4 CONN 206 2200 1 10W ON OFF C207 C208 3 3 0 22uF 25V 0 1uF 25V eon C209 0 33uF 250V CN202 0 001uF 50V CONN C212 2 4KQ 1 10W 0 0047uF 50V 213 0 1uF 25V 4 ES HVO HVL Din 202 1 11 1 9 1 D205 C314 51 1 10W R213 MLL4148 3 10bF 3
45. Service Manual ViewSonic VA712b 2 Model No VS10901 17 Color TFT LCD Display Manufacture Date Mar 30 06 ViewSonic Corporation Copyright Copyright 2005 by ViewSonic Corporation All rights reserved No part of this publication may be reproduced transmitted transcribed stored in a retrieval system or translated into any language or manual or otherwise without the prior written permission of ViewSonic Corporation Disclaimer ViewSonic makes no representation or warranties either expressed or implied with respect to the contents hereof and specifically disclaims any warranty of merchantability of 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 a registered trademark of ViewSonic Corporation ViewSonic is a registered trademark of ViewSonic Corporation All other trademark used within this document are the property of their respective owners Revision History Description of L 3 Approval Sep 9 05 05 Release YGWANG WANG Update the Handing and Placing Methods Mar 30 06 and the Circuit Description and the YG WANG Procedure ViewSonic Corporation TABLE OF CONTENTS 1 Precautions And Safety Notices 2 Specification 3 Front Panel Control And Indicators 4 Ci
46. Thats all The disassemble process of the unit is over 70 ViewSonic Corporation 9 1 3 Show pictures Picture 5 Picture 6 71 ViewSonic Corporation 5 Picture 10 Picture 11 Picture 12 27 ViewSonic Corporation e ou EE B TIT nn idir 3 Hark E it PK 235 CU mom mom E L N k 121217 r 0075 10 1 Picture 15 73 ViewSonic Corporation 1 4 AMI divs gt 4 LN ET Picture 16 Picture 17 Picture 18 Picture 19 Picture 20 74 ViewSonic Corporation 10 Block Diagram MCU Flash OSD Control Interface Keypad ViewSonic Corporation LCD Interface scaler RTD2523B LF Include ADC OSD etc RG B gt T 5 R G B H Sync pat bpcz EPR SEL v syne D SUEB CA 2416 Connector DB7 SDA DE12 SDA 5 DB 15 51 75 24 02 24 02 Crystal 14 31818M Hz 11 Schematic Diagram 11 1 VCC 5V D701 SMAL140 0 O U702 NC AP1117 1 8V 3 2 VIN VOUT gt gt 1 8DVCC DEL VCC 5V U701 R702 R703 470uF 16V 0 1uF
47. UME 16 Vs VAROUT R 14 OUTR N C 8 13 GND INR 9 12 MUTE SVR H0 11 STBY 2 ViewSonic Corporation Circuit Diagram G 1 2 3 13 18 1920 VOLUME Oo S 52 MUTE LE EEE f MUTE STBY n PROTECTIONS S_GND VAROUT L 5 100nF 300K LD7552BS IC901 PWM control high voltage startup current The circuit unit has functions such as over current protection over voltage protection output short circuit protection and etc The function of each pin and the inside circuit diagram are as follows Ground Voltage feedback pin same as the COMP pin in UC384X By 2 COMP connecting a photo coupler to close the control loop and achieve the regulation lw _6 NC 8 OUT 24 ViewSonic Corporation internal bias amp Vref Green Mode Oscillator PWM Comparator Leading J Ramp from Edge 7 Oscillator Blanking FAN7547A 1C201 The FAN7547A provides all control functions for a current fed push pull self oscillation type converter and also contains voltage Typical operating frequency range is between 30kHz depending on the CCFL Cold Cathode Fluorescent Lamp and the transformer s characteristics Name Function Description NO Name Function Description 11 FB Feedback put 2 ves Dimming Voltage 9 COMP EmorAmpierOup Ksa OLP Lamp Protection Output Drive Source Voltage
48. VGA Cable 3 2 2 Connect P3 of Fixture with DVI port of VA712b 2 by DVI DVI Cable 3 2 3 Connect P1 of Fixture with Printer port of PC by LPT Cable 3 2 4 Plug Power Adapter to Fixture 3 2 5 Connect Power Cord to VA712 2 VA712b 2 Monitor 3 2 6 Connect PC to the additional monitor JP1 Power Adapter P2 VGA Cable P3 DVI DVI Cable P1 to LTP Cable 1 1 1 D 41 ViewSonic Corporation 3 3 DDC Key In Procedure oep1 Select and execute DDC Key In program BEST pr m Er Horton Internet Adobe Reader E EK Ese Explorer 6 0 1 Microsoft WRL3355 tm 48 H be pes Microsoft 0003 Ward TH EAM 282 tmp ViewSonic Corporation C greenhouse 1 E C TODATAS 19 BH Dagan 19 sharp Tu EC 0 x E HJ YaTi2 2 FOR CPT 8421 16720 for hydis 86120 for QII E vett J TT 42 oep2 Inpute the S N and execute Enter H MERRE Norton Internet Adobe Reader Explorer 6 0 oy m 5 4 Input Serial Microsoft adjusting Qutlook TE m
49. ch the metal frame of the LCD panel or the front cover of the monitor Do not touch the surface of the polarizer Surface of the LCD panel is pressed by fingers and that may cause Mura Taking out the monitor by grasping the LCD panel That may cause Mura 4297 2 A oe ViewSonic Corporation Placing the monitor on foreign objects That could scratch the surface of the panel or cause Mura Place the monitor on a clean and soft foam pad Place the monitor the lap the The panel is placed facedown the lap That surface must be upwards cause Mura ViewSonic Corporation 2 Specification 2 1 PRODUCT SPECIFICATIONS LCD Panel 17 0 TFT Recommend Resolution 1280 x1024 60Hz LCD Display Color 16 2M Colors RGB 6 bit FRC data Horizontal 140 Viewing Angle Vertical 130 Vertical Refresh Rate Operating 0 to 40 C Storage 20 C to 60 C Input Signal Analog Digital Energy Star compliant VESA Power Management DPMS compatible 1 W Temperature Input Voltage 90 264 50 60Hz auto switch Consumption 39 Watts Max 36 Watts Typ Power ViewSonic Corporation 2 2 FACTORY SUPPORTING MODES Timing Table item Aeg Digital O OX Caza HN ENNNCICILCEITEENENN HN HN O Boxe aon arz ves ve Primary Preset VESA 1280 x1024 60Hz ViewSonic Corporation 2 3 INTERFACE DESCRIPTION D SUB 15
50. ed 2 Change to each mode in turn and wait for the monitor finish auto alignment and save press before change to next mode 3 Until all of modes are adjusted exit OSD menu and press POWER OFF to exit factory mode 5 4 Factory Defaults Brightness 100 OSD V Position 5 5 Function Test 1 Product 17 LCD Monitor 2 Test Equipment Color Video Signal amp Pattern or PC with SXGA resolution and a sound card 3 Test Condition Before function test and alignment each LCD Monitor should be warmed up for at least 30 minutes with the following conditions a ln room temperature b With full white screen RGB and Black c With cycled display modes 640 480 H 43 27kHz V 85Hz 800 600 H 53 7kHz V 85Hz 1024 768 H 68 67kHz V 85Hz 1280 1024 H 79 97kHz V 75Hz 30 ViewSonic Corporation 4 Test Display Modes amp Pattern Compatible Modes 640 x 350 70Hz 31 5kHz 640 x 400 70Hz 31 5kHz 640 x 480 60Hz 31 5kHz 640 x 480 67Hz 35 0kHz 640 x 480 72Hz 37 9kHz 640 x 480 75Hz 37 5kHz 720 x 400 70Hz 31 5kHz 800 x 600 56Hz 35 1kHz 800 x 600 60Hz 37 9kHz 800 x 600 75Hz 46 9kHz 800 x 600 72Hz 48 1kHz 832 x 624 75Hz 49 7kHz 1024 x 768 60Hz 48 4kHz 1024 x 768 70Hz 56 5kHz 1024 x 768 72Hz 58 1kHz 1024 x 768 75Hz 60 0kHz 1280 x 1024 60Hz 63 4kHz 1280 x 1024 75Hz 79 97kHz 1280x 720 60Hz 45kHz Function Test Display Pattern Test Con
51. ed in the menus and control screens Resolution Notice allows the user to enable or disable this notice Resolution Notice If you enable the Resolution Notice shown above and your computer is set at a resolution other than 1280 x 1024 the following screen appears Resolution Notice For picture quality change the resolution to 1280 x 1024 Press 1 to Clear Message Press 2 to Disable Message OSD Position allows the user to move the OSD menus and control screens OSD Timeout sets the length of time the OSD screen is displayed For example with a 30 second setting if a control is not pushed within 30 seconds the display screen disappears OSD Background allows the user to turn the OSD background On or Off Memory Recall returns the adjustments back to factory settings if the display is operating in a factory Preset Timing Mode listed in the Specifications of this manual 15 ViewSonic Corporation SHORT CUTS FUNCTION FROM THE BUTTONS To immediately activate Contrast menu It should be change to Brightness OSD by push button 2 Recall Contrast or Brightness while in the Contrast or V A Brightness adjustment or recall both of Contrast and Brightness when the OSD is not open 1 2 Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode 1 A White Balance Not shown on user s guide Power Lock Press and hold 2 amp W for 10 seco
52. immediately and consult your service technician Always unplug the monitor before cleaning it Clean the cabinet with a clean dry cloth Apply non ammonia based cleaner onto the cloth not directly onto the glass screen Keep the monitor away from magnetic objects motors TV sets and transformer Do not place heavy objects on the monitor or power cord 12 PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltages wattage etc Before replacing any of these components read the parts list in this manual carefully The use of substitute replacement parts which do not have the same safety characteristics as specified in the parts list may create shock fire or other hazards 1 3 SERVICE NOTES 1 When replacing parts or circuit boards clamp the lead wires around terminals before soldering 2 When replacing a high wattage resistor more than 1W of metal oxide film resistor in circuit board keep the resistor about 5mm away from circuit board 3 Keep wires away from high voltage high temperature components and sharp edges 4 Keep wires in their original position so as to reduce interference 5 Usage of this product please refer to also user s manual ViewSonic Corporation 1 4 HANDING AND PLACING METHODS Correct Methods Incorrect Methods Only tou
53. mmand 2 Command 3 Command 4 Command 5 Command 6 Command 7 Command 8 Command 9 Command No Command 10 Command 11 Command 12 Command 13 Command 14 Command 15 ViewSonic Corporation Step 5 Click dropdown listbox for MTV type select the 512 64 viewed on your set M Century ISP 2 4b File Action Edit Buffer Help MCU File Load File 080 File ISP S W CRC MTY212M32 212 641 crc MIV230M64 Check sm 12 64 1 64 Addr 412 128 MTV512M64 CPU MHz C Erase Target High C Read Target C Read Checksum Low RUN Program status Myson Century Inc Create Security File Step 6 Click Load MCU File button Select the object bincode on your corresponding directory Century ISP 2 4 File Action Edit Buffer Help MCU File C Documents and Settings ack 1 6920 OSD File IMTV512M64 S W 05 CRC 051 Check Sum 1635 Addr FFFF Auto CPU MHz Erase Target High C Read Target C Read Checksum Low RUN Program status Myson Century inc Create Security File Step 7 Click button to finish the selection of bincode Read file 39 ViewSonic Corporation Step 8 Select Auto optionbutt
54. n volume 8096 is working without noise and 34 ViewSonic Corporation resonance Make sure that the sound of right and left speakers are in balance Check for Secondary Display Modes Test Signal Analog 640 350 007 2 640 480 60 67 72 75 85Hz 720 400 0 70 2 800 600 56 60 72 75 85Hz 832 624 5Hz 1024 768 60 7 0 72 75 85Hz 1280 1024 060 75Hz Digital 640 350 p 0Hz 640 480 60 72 75 85Hz 7 20 400 70Hz 800 600 56 60 72 75 85Hz 1024 768 60 70 72 75 85Hz 1152 870 075 2 1280 720 060Hz 1280 1024 60Hz Normally when the primary mode 1280 1024 60Hz is well adjusted and compliant with the specification the secondary display modes will also be compliant with the spec But we still have to check with the general test pattern to make sure every secondary is compliant with the specification All Modes Reset After final QC step we have to erase all saved changes again and restore the factory defaults You should do All Mode Reset again Power Off Monitor Turn off the monitor by pressing Power button 35 ViewSonic Corporation 5 6 Firmware Upgrade Procedure When you receive the returned monitor please check whether the firmware version is the latest If not please do the following procedures to upgrade it to the latest version 1 Equipment Needed 712 2 7120 2 Monitor Fixture for Firmware Upgrade Power Adapter P N 47 58201 001 1 for Fixture VGA Cable P N 42 59901 003 1 Pi
55. n 4 11 should be connected to GND PC Personal Computer LPT Cable P N 42 59906 001 1 Firmware Upgrade Program One additional monitor for checking the program execution Printer Port LPT Cable VGA Cable P N 42 59906 001 P N 42 59901 003 2 Setup Procedure 2 1 Connect P1 of Fixture with printer port of PC by LPT Cable 2 2 Connect P2 of Fixture with VA712 2 VA712b 2 Monitor by VGA Cable 2 3 Connect Power Cord to VA712 2 VAT712b 2 Monitor 2 4 Connect P3 to the Signal Generator eg Chroma2326 for verifying it after the operation being completed 2 5 Connect PC to the additional monitor 36 ViewSonic Corporation P3 to Signal Generator 2 to LPT Cable Pe to VGA Cable 4 3 Firmware Upgrade Procedure Step 1 Let VA712 2 VA712b 2 set to be connected with AC cable and VGA cable Step 2 Execute the MSstar ISP tool So Se PHN BBE X 37 ViewSonic Corporation Step 3 Click Create Security File button Open a new window to key in security code Century ISP 2 4 File Action Edit Buffer Help File Load MCU File USD File SWCRC C C HWCRC oT oo f Auto CPU MHz Erase Target High Read Target Head Checksum RUN ns Program status Myson Century Inc M security ISP Slave Add SlaveB Add Command 1 Co
56. nds If the power button is pressed the message Power Button Locked will display for 5 seconds With or without 1 V this setting after a power failure your LCD display s power will automatically turn ON when power is restored Power Unlock Press and hold 2 amp W again for 10 seconds e OSD Lock Press and hold 1 A for 10 seconds If any buttons are pressed the message OSD Locked will 1 A display for 5 seconds e OSD Unlock Press and hold 1 amp A again for 10 seconds Remark All the short cuts Remark All the short cuts function are only available while OSD off are only available while OSD off 16 ViewSonic Corporation 4 Circuit Description 4 1 LCD MONITOR DESCRIPTION The LCD MONITOR will contain a Main Board an Power Board Key Board which house the flat panel control logic brightness control logic and DDC The Power Board will provide AC to DC Inverter voltage to drive the backlight of panel and the Main Board chips each voltage Monitor Block Diagram CCFL Drive Flat Panel and CCFL backlight Power Board Main Board 2 2 Include adapter inverter adjustment in factory mode Key Board AC IN HOST Computer 100V 240V Video signal DDC 17 ViewSonic Corporation 42 POWER BLOCK FUNCTION DESCRIPTION Inverter Block Function Vin Puck Connector E Parallet resonant inverter Driver Dimming control Circuit 18
57. on then execute the flashing action by clicking the RUN button Century ISP File Action Edit Buffer Help File ocuments and Settings slack e IE 920 Load MCU File OSD File Type 2 64 HWCRC Check 15800000000 CPU MHz Erase Target High Head Target Read Checksum Program status Myson Century Inc Create Security File Step 9 If the flashing F W has been completed the message of Check MCU CRC on the right TextBox means the Host verify ok for the progress of program Century ISP 4b File Action Edit Buffer Help File C Documents and Settingssslack e 5920 Load File OSD File 12 64 W CRC H W CRC Check Sun 1 B35 Max Addr 1 FFFF Auto CPU MHz Enter ISP mode Erase Program OE Clear CRC 0E Read Target _ Program Check ECT 2 not exist Erase Target Head Checksum Program status Myson Century inc Create Security File ViewSonic Corporation Step 10 Unplug and replug power cord of 712 2 7126 2 set and then check the OSD operation and image on srceen Step 11 At last do Memory Recall 3 2 Setup Procedure 3 2 1 Connect P2 and monitor of Fixture with VGA ports of VA712 2 VA712b 2 by
58. onitor on it the front side adown Picture 1 2 2 Disassemble the 4 screws that fix the stand remove the stand Picture 3 4 3 Disassemble the fix screws of the back cover Picture 5 4 Use equipment or abandoned IC card to prize up the bezel through the bottom flute as showed in the following the picture 6 7 and rip up the back cover downwards as showed in the following the picture 8 9 10 5 Disassemble the 4 screw M3 6MM through six angle sleeve spanner showed in the following picture 11 6 Disassemble the 4 fixed screws in the shield remove the shield as the direction arrowhead showed refer to the following picture 12 7 Disassemble the 4 screws and 4 pins of the PWPC board remove the PWPC board symbolized the following picture 13 with red color 8 Disassemble the 3 screws and 4 pins of the main board remove the main board symbolized the following picture 13 with blue color 9 Disassemble the 2 screws of the audio board remove the audio board symbolized the following picture 13 with green color Disassemble the 3 screws and connect pins of the Key board remove the Key board refer to the following picture 14 15 10 11 Disassemble 2 fixed screws of the main frame and remove the bezel as showed in the following the picture 16 17 12 Disassemble the 2 fixed screws of the panel remove the main frame as showed in the following the picture 18 19 20 Do not damage the cable of the panel 13
59. rcuit Description 5 Adjusting Procedure 6 Troubleshooting Flow Chart 7 Recommended Spare Parts List 8 Exploded Diagram And Spare Parts List 9 Disassemble Process 10 Block Diagram 11 Schematic Diagram 12 PCB Layout Diagram ViewSonic Corporation 11 17 27 47 48 66 70 15 76 83 1 Precautions And Safety Notices 1 1 SAFETY PRECAUTIONS This monitor is manufactured and tested on a ground principle that a user s safety comes first However improper use or installation may cause damage to the monitor as well as the user Carefully go over the following WARNINGS before installing and keep this guide handy WARNINGS This monitor should be operated only at the correct power sources indicated on the label on the rear end of the monitor If you re unsure of the power supply in your residence consult you local dealer or power company Use only the special power adapter that comes with this monitor for power input Do not try to repair the monitor your self as it contains no user serviceable parts This monitor should only be repaired by a qualified technician Do not remove the monitor cabinet There is high voltage parts inside that may cause electric shock to human bodies even when the power cord is unplugged Stop using the monitor if the cabinet is damaged Have it checked by a service technician Put your monitor only in a clean dry environment If it gets wet unplug the power cable
60. t o 495 ______ 7050 780 57138 ___ 496 7 PWITA2CPV2SNTP POWER BOARD FOR SMT 497 PWITA2CPV2AIP POWER BOARD FOR AI f 498 560 379 52 ______ 755285 50 8 109 499 ______ 560 660 1 FANT54TMX 5010 4 500 57417 4 PUBS3904 PLILIPS 04 501 1576417 4 502 56417 6 53 576 417 12 T 2N3904S RTK PS SOT 23 0204 504 576 417 12 T 2N3904S RTK PS SOT 23 Q208 60 ViewSonic Corporation 41 1 1 1 61 11 1 1 1 1 1 1 1 1 1 121 1 1 1 1 71 1 1 1 1 1 1 1 505 576 417 13 T 2N3906S RIK PS SOT 23 0005 500 ______ 576 760 4 ______ 507 ______ 576 760 5 508 _______576 760 48 PDTA144WK SOT 346 Q202 509 ______576 760 58 PDTCIA4WK SOT 346 9203 510 6110805102 CHIPR 1K OHM 5 1 8W R214 511 610805102 CHIPR 1K OHM 5 1 8W 8217 512 6110805102 CHIPR 1K OHM 5 1 8W R222 513 610805102 CHIPR 1K OHM 5 1 8W R223 514 610805102 CHIPR 1K OHM 5 1 8W R913 515 61L0805102 CHIPR 1K OHM 5 1 8W R925 516 610805102 CHIPR IK OHM 5 1 8W R927 517 6110805103 CHIPR 10KOHM 5 1 8W R224 518 6110805103 CHIPR 10KOHM 5 1 8W R225 519 6110805103 CHIPR 10KOHM 5 1 8W R226 50 6110805103 CHIPR 10KOHM 5 1 8W R227 521 6110805103 CHIPR 10KOHM 5 1 8W R914 52 6110805103 CHIPR
61. tal amp Vertical Thickness Pattern R Color Pattern Figure 4 Figure 3 G Color Pattern Figure 5 B Color Pattern Figure 6 2 9 ViewSonic Corporation Full White Pattern Figure 7 Dark Screen Pattern Figure 8 Black White Pattern Figure 9 4 3 Function Test and Alignment Procedure All Modes Reset You should do All Mode Reset Refer to Chapter 11 3 Hot Keys for Function Controls first This action will allow you to erase all end user 5 settings and restore the factory defaults Auto Image Adjust Please select and enter Auto Image Adjust function on Main Menu to see if it is workable The Auto Image Adjust function is aimed to offer a better screen quality by built in ASIC For optimum screen quality the user has to adjust each function manually Firmware Test Pattern Burn In Mode Refer to Chapter 111 3 Hot Keys for Function Controls sure the F W is the latest version DDC Test Pattern EDID program 33 ViewSonic Corporation Make sure it can pass test program Fine Tune and Sharpness Test Signal 1280 1024 60Hz Test Pattern Line Moire Pattern Check and see if the image has noise and focus performs well Eliminate visual line bar If not readjust by the following steps a Select and enter Fine Tune function on Manual Image Adjust to adjust the image to eliminate visual wavy noise b Then select and enter Sharpness function to adjust the clarity and foc
62. tent Test Content 640 x 350 70Hz 31 5kHz 640 x 400 70Hz 31 5kHz 640 x 480 60Hz 31 5kHz 640 x 480 67Hz 35 0kHz 640 x 480 72Hz 37 9kHz 640 x 480 75Hz 37 5kHz 720 x 400 70Hz 31 5kHz 800 x 600 56Hz 35 1kHz 800 x 600 60Hz 37 9kHz 800 x 600 75Hz 46 9kHz 800 x 600 72Hz 48 1kHz 832 x 624 75Hz 49 7kHz 1024 x 768 60Hz 48 4kHz 1024 x 768 70Hz 56 5kHz 1024 x 768 72Hz 58 1kHz 1024 x 768 75Hz 60 0kHz 1280 x 1024 60Hz 63 4kHz 1280 x 1024 75Hz 79 97kHz 1280x 720 60Hz 45kHz Specification Frequency amp rine Line Moire visual wavy mt Tracking noise Contrast Bright 16 gray levels sh should ness joa cap be distinguishable guten Horizontal and Vertical 3 Boundary Horizontal amp Vertical position of video should Figure 3 Thickness ViewSonic Corporation be adjustable to be within the screen frame RGB Color Contrast of each R G 4 RGB Color Intensities color should be 9 Performance 4 5 6 normal Screen 5 Uniformity amp Full White BE Crit iu with the spec Flicker Dead White Screen amp Dark numbers of dead Pixel Line Screen poe should be Figure 7 8 compliant with the spec he screen must have 7 White Balance White amp Black Pattern the pure white and black Figure 9 pattern no other color 31 Fine Line Morie Pattern Figure1 Gray Scale Pattern Figure2 Horizon
63. us of the screen image Boundary Test Signal 1280 1024 60Hz Test Pattern Horizontal amp Vertical Line Thickness Pattern Check and see if the image boundary is within the screen frame If not readjust by the following steps a Select and enter Manual Image Adjust function on OSD Main Menu b Then select and enter Horizontal Size or Horizontal Vertical Position function to adjust the video boundary to be full scanned and within screen frame White Balance Test Signal 640 480 0 660 2 Test Pattern White and Black Pattern 1 5 8 R G B Colors Contrast Test Signal 1280 1024 60Hz Test Pattern R G B Color Intensities Pattern and 16 Gray Scale Pattern Check and see if each color is normal and distinguishable f not please return the unit to repair area Screen Uniformity and Flicker Test Signal 1280 1024 60Hz Test Pattern Full White Pattern Check and see if it is in normal condition 1 5 10 Dead Pixel and Line Test Signal 1280 1024 60Hz Test Pattern Dark and White Screen Pattern Check and see if there are dead pixels on LCD panel with shadow gauge and filter film The total numbers and distance of dead pixels should be compliant with the spec Mura Test Pattern White RGB Black amp Grey Test Tool 1096 ND Filter Check if the Mura can pass 10 ND Filter Audio Test Signal Voice signal optional depend on model Test Pattern liberty Make sure there is audio output Make sure that audio functio
64. v A lt Doc gt lt Re ate Saturday October 11 2003 heet 1 of 1 11 8 Key Pad R CN006 LED ORANGE LED GREEN LED ORANGE GND CONN Size Document Number A CONTROL KEY PAD Switch Date Saturday September 10 2005 Sheet 83 ViewSonic Corporation 12 PCB Layout Diagram 12 1 MAIN BOARD PCB TOP VIEW HH 71561675 C 0830 2005 84 ViewSonic Corporation 71561675 C 0830 2005 ViewSonic Corporation 12 2 MAIN BOARD PCB BUTTON VIEW ViewSonic Corporation 86 12 3 KEYBOARD VIEW MUTE KETI KEY 2 POWER cm ed 15 1690 d 500 3 584104 wd 0 mae T 8 3 Wap G o mmu DOWN o m L 124 KEYBOARD BUTTON VIEW 87 ViewSonic Corporation 12 5 POWER PCB TOP VIEW ee mu Tz m CAUTION 2 8 7 ViewSonic Corporation ViewSonic Corporation 12 6 AUDIO PCB TOP VIEW amp BUTTON VIEW 90 ViewSonic Corporation Reader s Response Dear Readers Thank you in advance for you 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 after reading VA712b 2 Service Manual 1 Precautions And Safety Notice
65. witch the MEM channel to Channel 11 with up or down arrow on Chroma 7120 3 The LCD indicator on Chroma 7120 will show x 0 346 0 02 y 0 359 0 02 gt 210 cd m 4 Adjust the RED of color3 on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN of color3 on factory window until Chroma 7120 indicator reached the value G 100 6 Adjust the BLUE of color3 on factory window until Chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until Chroma 7120 RGB value meet the tolerance 100 5 E Adjust SRGB color temperature 1 Switch the chroma 7120 to RGB Mode with press MODE button 2 Switch the MEM channel to Channel 10 with up or down arrow on chroma 7120 3 The LCD indicator on chroma 7120 will show x 0 313 0 02 y 0 329 0 02 Y gt 220 cd m 4 Adjust the RED of color3 on factory window until Chroma 7120 indicator reached the value R 100 5 Adjust the GREEN of color3 on factory window until Chroma 7120 indicator reached the value G 100 6 Adjust the BLUE of color3 on factory window until Chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until Chroma 7120 RGB value meet the tolerance 210075 29 ViewSonic Corporation F Press reset key and Turn the Power button off to on to quit from factory mode 2 Geometry 1 Set cross hatch pattern and preset timing as timing table list
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