AOC 197Va Service Manual Download Page 30 | Manualshive

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AOC 197Va Service Manual Download Page 30

19" LCD Color Monitor

AOC 197Va

30

9.2 Trouble Shooting

9.2.1 Main Board

1. NO SCREEN APPEAR

No power

No power

Press power key and look
if the picture is normal

Please reinsert and make sure
the AC of 100-240 is normal

Measure U702 PIN2=3.3V

Reinsert or check the
power section

X401 oscillate waveforms
are normal

Measure CN701 PIN5/6=12V?
Measure CN701 PIN9/10=5V?

Replace U401

Replace X401

OK

OK

OK

NG

NG

NG

NG

Check power
section

NG

OK

Replace U702

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Summary of Contents for 197Va

Page 1: ...ure 6 4 Input Output Specification 7 4 1 Input Signal Connector 7 4 2 Factory Preset Display Modes 8 4 3 Power Supply Requirements 8 5 Panel Specification 9 5 1 Display Characteristics 9 5 2 Optical C...

Page 2: ...19 LCD Color Monitor AOC 197Va 2 Revision List Revision Date Revision History TPV Model A00 Dec 27 2007 Initial release T97HMADCF1AOANE A01 Dec 18 2008 Add TPVDW Model In Item 13 T98HMADCF1ACANE...

Page 3: ...280 1024 75Hz Plug Play VESA DDC2BTM ON Mode 37W EPA ENERGY STAR OFF Mode 2W Input Connector 15 pin D Sub DVI D Input Video Signal Analog 0 7Vp p standard 75 OHM Positive DVI D Digital Interface TMDS...

Page 4: ...ogic 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 HOST Computer AC IN 100V 240V PWPC bo...

Page 5: ...4 Volume down 5 Volume Up Power Button Press this button to turn the monitor ON or OFF Power Indicator Blue Power On mode Orange off mode MENU ENTER Activate OSD menu when OSD is OFF or activate de ac...

Page 6: ...register Luminance Brightness Backlight Adjustment Focus Adjust Picture Phase to reduce Horizontal Line noise Image Setup Clock Adjust picture Clock to reduce Vertical Line noise H Position Adjust the...

Page 7: ...GND B VGA connector layout 1 5 6 10 11 15 4 1 2 DVI D connector Pin No Signal Name Pin No Signal Name 1 TMDS Data 2 13 TMDS Data 3 2 TMDS Data 2 14 5V Power 3 TMDS Data 2 4 Shield 15 Ground for 5V 4...

Page 8: ...uency Hz Dos mode 720 x 400 31 47 70 640 x 480 31 47 60 640 x 480 35 66 6 640 x 480 37 5 75 VGA 640 x 480 37 86 72 800 x 600 37 879 60 800 x 600 46 875 75 800 x 600 35 16 56 800 x 600 48 01 72 SVGA 83...

Page 9: ...19 LCD Color Monitor AOC 197Va 9 5 Panel Specification 5 1 Display Characteristics 5 2 Optical Characteristics...

Page 10: ...19 LCD Color Monitor AOC 197Va 10 5 3 Parameter guide line for CCFL Inverter 1 TFT LCD Module 2 Back Light Unit...

Page 11: ...19 LCD Color Monitor AOC 197Va 11 6 Block Diagram 6 1 Software Flow Chat 1 2 N Y 5 Y N 10 Y N 12 Y N 7 Y N 6 4 3 8 9 14 11 13 Y N 15 Y N 16 17 19 Y N 18...

Page 12: ...e LED and set it to green color Scalar initializes 10 In standby mode 11 Update the lifetime of back light 12 Check the analog port are there any signals coming 13 Does the scalar send out an interrup...

Page 13: ...Diagram 6 2 1 Main Board FLASH MEMORY PM25LV010A U402 Scalar TSUM56AWK Include MCU ADC OSD etc U401 LCD Interface CN101 EEPROM M24C16 U403 D Sub Connector CN405 H sync V sync RGB EEPROM M24C02 U404 R...

Page 14: ...ectifier and Filter Start Circuit R905 R906 R907 R908 R909 R910 PWM Control IC Transformer Over Voltage Protect Rectifier diode AC input 5V 12V ON OFF Control PWM Control IC Feedback Circuit OSC and O...

Page 15: ...19 PB 0 5 PB 6 11 GPO 0 4 OSP VLCD_12V PB 12 23 TSUM16AK PA 0 7 3V3 PA 8 13 VCC1 8 PA 14 19 PB 6 11 B4 4 SCALER RIN GIN SOG BIN GNDR GNDG GNDB HSYNC VSYNC Adj_BACKLIGHT VCC1 8 Vcc3 3 VCTRL PA 0 7 PA 8...

Page 16: ...1 4K7 D C 5V R703 2K 1 16W 4 7K C716 0 1uF 5V R710 NC on_Panel 4 R31 C708 1uF R716 NC Q701 PMBS3904 R31 GND 5V 3 4 5V GND H3 TP 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 C719 NC 10uF 16V VCC1 8 4 VLCD C718...

Page 17: ...16W R443 100 1 16W C433 0 047uF DET_VGA 4 SOG 4 B 4 R460 10K 1 16W R467 10 1 16W R436 56 1 16W GNDR 4 DDCD_SCL 4 ESD_5V VSYNC 4 CN406 JACK DVI 1 2 3 4 5 6 7 8 25 28 9 10 11 12 13 14 15 16 26 29 17 18...

Page 18: ...PA 8 13 5 CLK 3 G 3 GIN 3 BIN 3 KEY_A CN404 CONN 2 4 6 8 10 12 14 1 3 5 7 9 11 13 C409 0 1uF U403 AT24C16N 10SC 2 7 1 2 3 4 5 6 7 8 A0 A1 A2 GND SDA SCL WP VCC CLK 3 VCC3 3 PA0 PA16 PA5 R406 10K 1 16W...

Page 19: ...FR1P C107 NC NC 12V RA2N CLKBN R108 NC NC PB7 PA 14 19 4 R90 V B1N BR1P BB3P STV2 FB2N NC PA18 LVB3M FG0P NC GB2N RXO2 RXOC GPOO2 PA1 LVB1M RA1P GA2N RB1N LVB3M 0R R92 V GA3P BB2P NC STV1 QDI 17 B0P...

Page 20: ...1 2 C926 1000uF 16V C913 220pF 50V ZD922 RLZ5 1B 1 2 C911 22uF 50V LD7575 IC901 LD7575 RT 1 CS 3 GND 4 N C 7 COMP 2 OUT 5 VCC 6 HV 8 R926 33K 1 10W 1 R901 330K 1 8W R910 7R5 1 8W R900 330K 1 8W CN902...

Page 21: ...9 0 047UF 50V Q801 PMBS3904 3 2 1 R810 100K 1 10W N C R833 75K 1 10W R815 100K 1 10W R825 560 1 10W PT801 80GL17T 36 DN 5 3 7 4 1 8 R808 470K 1 8W C816 10PF 3KV Q803 PMBS3904 3 2 1 R816 1M 1 10W R842...

Page 22: ...19 LCD Color Monitor AOC 197Va 22 8 PCB Layout 8 1 Main Board...

Page 23: ...19 LCD Color Monitor AOC 197Va 23...

Page 24: ...19 LCD Color Monitor AOC 197Va 24...

Page 25: ...19 LCD Color Monitor AOC 197Va 25 8 2 Power Board...

Page 26: ...19 LCD Color Monitor AOC 197Va 26...

Page 27: ...19 LCD Color Monitor AOC 197Va 27...

Page 28: ...19 LCD Color Monitor AOC 197Va 28 8 3 Key Board 8 4 Audio Board...

Page 29: ...197Va 29 9 Maintainability 9 1 Equipments and Tools Requirement 1 Voltmeter 2 Oscilloscope 3 Pattern Generator 4 DDC Tool with an IBM Compatible Computer 5 Alignment Tool 6 LCD Color Analyzer 7 Servi...

Page 30: ...and look if the picture is normal Please reinsert and make sure the AC of 100 240 is normal Measure U702 PIN2 3 3V Reinsert or check the power section X401 oscillate waveforms are normal Measure CN70...

Page 31: ...ture OK OK NG NG Measure U702 PIN2 3 3V Replace U702 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable is connected normally Input the s...

Page 32: ...oltage of C907 Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901 Check R912 R913 and Change IC901 NG Check the auxiliary voltage is bigger than 10V and smaller...

Page 33: ...r Q806 Check the pin1 of IC801 have saw tooth wave NG Change IC801 Check D801 D802 D803 D804 have the output of square wave at Check R820 R821 C817 R822 Check R830 R831 C826 R832 Check the resonant wa...

Page 34: ...4 OSD is unstable or not working Is Key Pad Board connecting normally Connect Key Pad Board Is Button Switch normally Replace Button Switch Y N N Is Key Pad Board normally Replace Key Pad Board Y N Y...

Page 35: ...tch the MEM Channel to Channel 3 with up or down arrow on chroma 7120 3 The LCD indicator on chroma 7120 will show x 296 20 y 311 20 Y 180 cd m2 4 Adjust the RED of color1 on factory window until chro...

Page 36: ...19 LCD Color Monitor AOC 197Va 36 11 Monitor Exploded View...

Page 37: ...23 WIRE HARNESS D1G1730 8120 SCREW D1G1730 8120 SCREW M1G 130 5120 SCREW M3X5 M1G 330 4120 SCREW M1G 930 6 47 CR3 SCREW M1G1140 6120 SCREW M1G2640 10 47 CR3 SCREW Q1G 330 8 47 CR3 SCREW 3X8mm Q1G 330...

Page 38: ...1 6 R212 61G 60222452T RST CFR 220KOHM 5 1 C209 67G 2151007NT ELCAP 10UF 20 50V 10 C210 67G 2151007NT ELCAP 10UF 20 50V 10 C201 67G215B4713HT ELCAP 470UF 20 16V 1 C202 67G215B4713HT ELCAP 470UF 20 16V...

Page 39: ...T CHIPR 10 OHM 5 1 R468 61G0603100 RST CHIPR 10 OHM 5 1 R469 61G0603100 RST CHIPR 10 OHM 5 1 R411 61G0603101 RST CHIPR 100 OHM 5 R418 61G0603101 RST CHIPR 100 OHM 5 R420 61G0603101 RST CHIPR 100 OHM 5...

Page 40: ...5 R403 61G0603390 0F RST CHIPR 390 OHM 1 R474 61G0603392 RST CHIPR 3 9KOHM 5 R475 61G0603392 RST CHIPR 3 9KOHM 5 R437 61G0603471 RST CHIPR 470 OHM 5 R405 61G0603472 RST CHIPR 4 7KOHM 5 R422 61G060347...

Page 41: ...2PF 50V X7R C443 65G0603221 32 CHIP 220PF 50V X7R C417 65G0603224 17 CAP 0603 0 22UF 10V Y5V C425 65G0603224 17 CAP 0603 0 22UF 10V Y5V C444 65G0603224 17 CAP 0603 0 22UF 10V Y5V C446 65G0603224 17 CA...

Page 42: ...1 CJ TACT SWITCH TSVB 2 DP001 81G 12 2 GP LED CN002 88G 30217T TO PHONE JACK SWITCH R001 61G 60251152T RST CFR 510 OHM 5 1 R002 61G 60251152T RST CFR 510 OHM 5 1 R003 61G0603000 RST CHIPR 0 OHM 5 1 C0...

Page 43: ...K0 57002 Q900 ASS Y IC901 56G 379 61 LD7575PS SOP 8 IC801 56G 608 10 OZ9938GN Q801 57G 417 4 PMBS3904 PHILIPS SMT 04 Q802 57G 417 4 PMBS3904 PHILIPS SMT 04 Q803 57G 417 4 PMBS3904 PHILIPS SMT 04 Q805...

Page 44: ...HIPR 10KOHM 5 1 R818 61G1206150 RST CHIPR 15 OHM 5 1 R819 61G1206150 RST CHIPR 15 OHM 5 1 R828 61G1206150 RST CHIPR 15 OHM 5 1 R829 61G1206150 RST CHIPR 15 OHM 5 1 R807 61G1206220 RST CHIPR 22 OHM 5 1...

Page 45: ...02 1 5MM RIVET L902 6G 31502 1 5MM RIVET NR901 6G 31502 1 5MM RIVET PT801 6G 31502 1 5MM RIVET PT802 6G 31502 1 5MM RIVET Q900 6G 31502 1 5MM RIVET R916 6G 31502 1 5MM RIVET T901 6G 31502 1 5MM RIVET...

Page 46: ...20 50V 10 34FPE19P03 CASE EEL19 34FPE19P03 CASE EEL19 R909 61G152M10458F6W56 RST MOFR 100KOHM 5 2 96G 29 6 SHRINK TUBE UL CSA HS3 D9 2 90G6264 1 HEAT SINK D920 93G 60276 DIODE SBT150 10LST SANY M1G17...

Page 47: ...19 LCD Color Monitor AOC 197Va 47 13 Different Parts List Diversity of T98HMADCF1ACANE compared with T97HMADCF1AOANE Location Part No Description CBPC8HMAAOH MAIN BOARD...

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