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AOC 212Va, Service Manual

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AOC 212Va Service Manual Download Page 34

22" LCD Color Monitor                                                                                                        AOC 212Va              

34                                                                                                                  

8.2 Trouble Shooting 

8.2.1 Main Board 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No power 

Press power key and look 

if the picture is normal 

Please reinsert and make sure 

the AC of 100-240 is normal 

Reinsert or check the 
Adapter/Inverter 
section

X401 oscillate waveforms 

are normal 

Check CN701 or replace 
U702

，

Q702 or D701 

Replace U401 

Replace X401 

OK 

OK 

OK 

NG 

NG 

NG 

NG 

Measure U702 PIN2=3.3V   

D701 (-) =1.8V 

Summary of Contents for 212Va

Page 1: ...eration Instruction 7 3 1 General Instructions 7 3 2 Control Button 7 3 3 OSD Menu 8 4 Input Output Specification 11 4 1 Input Signal Connector 11 4 2 Factory Preset Display Modes 12 4 3 Panel Specifi...

Page 2: ...22 LCD Color Monitor AOC 212Va 2 Revision List Version Release Date Revision History TPV Model Name A00 May 10 2007 Initial release TC6MMADQWJAO8...

Page 3: ...aracteristics may create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from AOC AOC assumes no liability express or im...

Page 4: ...scan Size Maximum 296 1mm Optimal preset resolution 1680 x 1050 60 Hz Highest preset resolution 1680 x 1050 60 Hz Plug Play VESA DDC2B Input Connector D Sub 15pin DVI 24 pin Input Video Signal Analog...

Page 5: ...22 LCD Color Monitor AOC 212Va 5 Operating 10 to 85 non condensing Non Operating 5 to 80 non condensing Altitude Operating 0 3000m 0 10000 ft Non Operating 0 5000m 0 15000 ft Regulations CE TCO03...

Page 6: ...ss 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 AC IN 100V 240V Power board...

Page 7: ...the panel of the monitor By changing these settings the picture can be adjusted to your personal preferences The power cord should be connected Press the power button to turn on the monitor the power...

Page 8: ...nctions Once the desired function is highlighted press the MENU button to activate it If the function selected has a sub menu press or again to navigate through the sub menu functions Once the desired...

Page 9: ...djust picture Clock to reduce Vertical Line noise Focus 0 100 Adjust Picture Phase to reduce Horizontal Line noise H Position 0 100 Adjust the vertical position of the picture V Position 0 100 Adjust...

Page 10: ...ame Saturation H position Adjust Frame horizontal Position Position V position Adjust Frame vertical Position Bright Frame on or off Disable or Enable Bright Frame OSD Setup H Position 0 100 Adjust th...

Page 11: ...8 GND B VGA connector layout Pin No Signal Name Pin No Signal Name Pin No Signal Name 1 TMDS Data 2 9 TMDS Data 1 17 TMDS Data 0 2 TMDS Data 2 10 TMDS Data 1 18 TMDS Data 0 3 TMDS Data 2 4 Shield 11...

Page 12: ...70 0 VGA 640 x 480 31 47 60 0 VGA 640 x 480 37 50 75 0 SVGA 800 x 600 37 879 60 0 SVGA 800 x 600 46 875 75 0 XGA 1024 x 768 48 363 60 0 XGA 1024 x 768 56 476 70 0 XGA 1024 x 768 60 02 75 0 XGA 1024 x...

Page 13: ...is a 22 inch wide TFT LCD module with a 4 CCFL Backlight Unit and a 30 pin 2ch LVDS interface This module supports 1680 x 1050 WSXGA 16 10 wide screen mode and displays up to 16 7 millions colors The...

Page 14: ...22 LCD Color Monitor AOC 212Va 14 4 3 4 Optical Characteristics 4 3 5 Electrical Characteristics 1 TFT LCD 2 Backlight...

Page 15: ...22 LCD Color Monitor AOC 212Va 15 5 Block Diagram 5 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 16: ...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 17: ...16B SNG U403 Panel Interface CN101 SDA SCL Crystal 14 318MHZ X401 Flash Memory PM25LV010 25 SCE U402 Scalar TSUMU58WHJ LF Include MCU ADC OSD U401 H sync V sync RGB DDCA_SDA DDCA_SCL D Sub Connector C...

Page 18: ...902 DIM DIM EMI filter Start Circuit R904 R932 R933 PWM Control IC Transformer AC input 5V ON OFF Control PWM Control IC Feedback Circuit Output Circuit Transformer MOSFET Over Voltage Lamp ON OFF 12V...

Page 19: ...1 10W Q705 PMBS3906 GND 715G2186 1 B POWER Custom 2 5 Thursday October 12 2006 Title Size Document Number Rev Date Sheet of 12V R721 0 1 10W C707 NC VCC3 3 5V R723 10K 1 10W 12V C710 100uF 25V R704 10...

Page 20: ...D419 BAV99 3 1 2 HDCP_RST 4 PC5V DDCA_SDA 4 DAT1 G 4 R450 10K 1 10W RED C452 0 1uF DDCD_SDA 4 SCL_DVI R451 10K 1 10W CN406 JACK 1 2 3 4 5 6 7 8 25 28 9 10 11 12 13 14 15 16 26 29 17 18 19 20 21 22 23...

Page 21: ...1 10W LVDS 715G2186 1 R428 100 1 10W BIN 3 G 3 OUT R C457 0 1uF PB2 KEY_B R408 10K 1 10W VCC3 3 2 R487 10K 1 10W VCC1 8 5V KEY_RIGHT KEY_A C418 10uF 50V PA 0 9 5 PA1 R425 10K 1 10W VCC3 3 KEY_C CN404...

Page 22: ...R720 150 1 4W PB3 LVA2M LVA1M VLCD 2 PA 0 9 4 RXE1 LVACKP RXO0 LVA0M LVB2P RXO2 LVB3M PB0 RXE3 RXO0 PA1 LVB2M LVACKP VLCD LVB1M RXE1 C720 22uF 50V PA9 RXE2 LVA0P PA5 LVB1P PB4 LVA3P LVA0M LVB2M LVB0M...

Page 23: ...V D902 PS102R C901 0 001uF 250V C914 470uF 16V R937 1K 1 4W R905 NC Q901 STP10NK70ZFP R903 100 1 4W C918 470uF 25V C924 0 1uF C905 100uF 450V C902 0 001uF 250V R939 10 1 4W R907 NC C908 22uF 50V R908...

Page 24: ...3KV R814 2M 1 10W R842 750K 1 4W 2 PWPCC42MO1P AOC Top Victory Electronics Co Ltd Custom 2 2 Title Size Document Number Rev Date Sheet of C802 47pF 3KV D803 BAV99 3 1 2 PT802 POWER X FMR 6 2 8 9 R858...

Page 25: ...51 220uF 25V C615 1800pF Q601 NC PMBS3904 GND C634 NC AVDDRef AVDDRef C612 1800pF C619 1uF 16V G1556 2 IO X 1 C AUDIO BD for TPA3002 3003 Custom 1 1 Tuesday March 06 2007 Title Size Document Number Re...

Page 26: ...22 LCD Color Monitor AOC 212Va 26 7 PCB Layout 7 1 Main Board 715G2186 1...

Page 27: ...22 LCD Color Monitor AOC 212Va 27...

Page 28: ...22 LCD Color Monitor AOC 212Va 28...

Page 29: ...22 LCD Color Monitor AOC 212Va 29 7 2 Power Board 715G2210 1 IO...

Page 30: ...22 LCD Color Monitor AOC 212Va 30...

Page 31: ...22 LCD Color Monitor AOC 212Va 31...

Page 32: ...22 LCD Color Monitor AOC 212Va 32 7 3 Audio Board 715G1566 2 7 4 Key Board...

Page 33: ...212Va 33 8 Maintainability 8 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 34: ...and look if the picture is normal Please reinsert and make sure the AC of 100 240 is normal Reinsert or check the Adapter Inverter section X401 oscillate waveforms are normal Check CN701 or replace U...

Page 35: ...ture OK OK NG NG Measure U702 PIN2 3 3V D701 1 8V Replace U702 Q702 or D701 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable Input the...

Page 36: ...heck Q704 is broken or CN101 solder Check Correspondent component Replace Panel Check Correspondent component Replace U401 OK OK Replace X401 OK NG NG NG NG Check reset circuit of U401 is normal OK X4...

Page 37: ...ltage of C905 Check bridge rectified circuit and F901 circuit Check start voltage for the pin 8 of IC901 Check R904 R932 R933 or Change IC901 Check the auxiliary voltage is bigger than 10V and smaller...

Page 38: ...11 12V Check and Debug Primary side circuit NG OK Check CN902 PIN3 3 3V OK Check and Debug Main board Check IC801 PIN3 PIN5 5V OK Check IC801 pin11 pin12 pin19 pin20 output is PWM Check PT801 PT802 o...

Page 39: ...8 2 3 Keypad Board 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...

Page 40: ...press MENU key A Adjust Warm 6500K color temperature 1 Switch the chroma 7120 to RGB Mode with press MODE button 2 Switch the MEM channel to Channel 3 with up or down arrow on chroma 7120 3 The LCD in...

Page 41: ...100 7 Repeat above procedure item 4 5 6 until chroma 7120 RGB value meet the tolerance 100 2 D Adjust sRGB color temperature 1 Switch the chroma 7120 to RGB Mode with press MODE button 2 Switch the ME...

Page 42: ...22 LCD Color Monitor AOC 212Va 42 10 Monitor Exploded View...

Page 43: ...M TAPE 078G 336 4 G SPEAKER 8OHM 3W L 435MM 100X34 MM 089G 17356G553 AUDIO CABLE 1800MM 089G 725HAA550 SIGNAL CABLE 089G402A15NIS1 POWER CORD 095G8018 3D558 LVDS CABLE 0M1G 130 6125 SCREW 0M1G 330 312...

Page 44: ...0 5 11MM C601 067G305V100 7N GP KME50VB10M CC3 5 11 CN601 088G 30214K PHONE JACK 5PIN U601 090G6119 1 HEAT SINK U601 056G 616 6 TPA3003D2PFBRG4 TQFP 48 R602 061G0603000 RST CHIPR 0 OHM 5 1 10W R604 06...

Page 45: ...12 CHIP 1UF 16VX7R 0603 C624 065G0603105 12 CHIP 1UF 16VX7R 0603 C622 065G0603221 32 CHIP 220PF 50V X7R FB602 071G 56Z601 M CHIP BEAD 600OHM FB604 071G 56Z601 M CHIP BEAD 600OHM FB610 071G 56Z601 M C...

Page 46: ...C PM25LV010 25 SCE SOIC 8 PMC U407 056G1133 87 1 IC CAT24C08W SOIC 8 U403 056G113356A 24LC16B SNG SOIC 8PIN Q402 057G 417 4 PMBS3904 PHILIPS SMT 04 Q404 057G 417 4 PMBS3904 PHILIPS SMT 04 Q406 057G 41...

Page 47: ...W R441 061G0603101 RST CHIPR 100 OHM 5 1 10W R442 061G0603101 RST CHIPR 100 OHM 5 1 10W R443 061G0603101 RST CHIPR 100 OHM 5 1 10W R445 061G0603101 RST CHIPR 100 OHM 5 1 10W R453 061G0603101 RST CHIPR...

Page 48: ...03 RST CHIPR 10 KOHM 5 1 10W R450 061G0603103 RST CHIPR 10 KOHM 5 1 10W R451 061G0603103 RST CHIPR 10 KOHM 5 1 10W R471 061G0603103 RST CHIPR 10 KOHM 5 1 10W R484 061G0603103 RST CHIPR 10 KOHM 5 1 10W...

Page 49: ...00 0 OHM 1 10W R719 061G1206151 RST CHIPR 150 OHM 5 1 4W R720 061G1206151 RST CHIPR 150 OHM 5 1 4W C435 065G0603102 32 1000PF 10 50V X7R C709 065G0603104 32 CHIP 0 1UF 50V X7R C711 065G0603104 32 CHIP...

Page 50: ...4 32 CHIP 0 1UF 50V X7R C401 065G0603104 32 CHIP 0 1UF 50V X7R C402 065G0603104 32 CHIP 0 1UF 50V X7R C404 065G0603104 32 CHIP 0 1UF 50V X7R C405 065G0603104 32 CHIP 0 1UF 50V X7R C406 065G0603104 32...

Page 51: ...MM5V6ST D415 093G 39147SEM ZMM5V6ST D414 093G 39147SEM ZMM5V6ST D412 093G 39147SEM ZMM5V6ST D411 093G 39147SEM ZMM5V6ST D410 093G 39147SEM ZMM5V6ST D409 093G 39147SEM ZMM5V6ST D408 093G 39147SEM ZMM5V...

Page 52: ...EL IC903 056G 139 7 1 IC EL817MA M TYPE IC903 056G 139 3A PC123Y22FZOF IC903 056G 139 3B PC123 Y82FZ0F NR901 061G 5810T RST NTCR 8 OHM 20 4A 13MM THINKING C802 065G 3J4706ET 47PF 5 3KV TDK C804 065G 3...

Page 53: ...D FILTER 200MH 25 DADON L804 073G 174 35DNA FILTER 200MH 25 L802 073G 174 35DNA FILTER 200MH 25 L904 073G 253 91 H CHOKE COIL L903 073G 253 91 H CHOKE COIL L903 073G 253 91 L CHOKE BY LI TA L904 073G...

Page 54: ...6G 608 7 OZT1060GN SOIC 20 Q903 057G 417 4 PMBS3904 PHILIPS SMT 04 Q803 057G 417 4 PMBS3904 PHILIPS SMT 04 Q812 057G 600 61 AM4502C TI PF S0 8 Q811 057G 600 61 AM4502C TI PF S0 8 Q805 057G 600 61 AM45...

Page 55: ...KOHM 5 1 10W R911 061G0805102 RST CHIPR 1KOHM 5 1 8W R938 061G0805103 10 KOHM 1 10W R915 061G0805204 RST CHIPR 200 KOHM 5 1 8W R821 061G0805390 2F RST CHIPR 39 KOHM 1 1 8W R852 061G0805392 0F RST CHIP...

Page 56: ...HIPR 200 KOHM 5 1 4W R849 061G1206204 RST CHIPR 200 KOHM 5 1 4W R912 061G1206223 RST CHIP 22K 1 4W 5 R930 061G1206243 1F RST CHIPR 2 43KOHM 1 1 4W R929 061G1206330 2F RST CHIPR 33 KOHM 1 1 4W R927 061...

Page 57: ...X7R C932 065G0805102 31 1000PF 50V NPO C907 065G0805104 32 CHIP 0 1U 50V X7R C916 065G0805104 32 CHIP 0 1U 50V X7R C920 065G0805104 32 CHIP 0 1U 50V X7R C924 065G0805104 32 CHIP 0 1U 50V X7R C927 065G...

Page 58: ...W D909 093G 6432S IN4148W D803 093G 6433P BAV99 D810 093G 6433P BAV99 D812 093G 6433P BAV99 D820 093G 6433P BAV99 ZD802 093G 39GA01 T RLZ5 6B ZD801 093G 39GA01 T RLZ5 6B ZD803 093G 39GA01 T RLZ5 6B ZD...

Page 59: ...2 EPS R Q44GC012624 1A CARTON Q45G 88606 R PE BAG FOR BASE Q45G 88606 16 R PE BAG FOR CLAMP Q45G 88609 74 R EPE BAG FOR MONITOR Q45G 88626 8 R PE BAG FOR MONITOR Q52G6020 29 PROTECT FILM S95G80183558...

Page 60: ...0 6MM 095F 210 88 UL 1571 28A WG TS 0D 0 6MM 095F 210 88 UL 1571 28A WG TS 0D 0 6MM 095F 210 89 UL 1571 28A WG TS 0D 0 6MM 095F 210 89 UL 1571 28A WG TS 0D 0 6MM 033F303SM24K30 PK2407P30 TD00 30LH 03...

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