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AOC e2040Va, Service Manual

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AOC e2040Va Service Manual Download Page 37

20" LCD Color Monitor                                        AOC e2040Va

 

37 

White Screen 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

 
 
 
 
 
 

White screen 

Measure Q302 base is 
low level? 

X401 oscillate 
waveform is normal

 

Check FB301,Q301 is 
broken,or CN301 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 

Summary of Contents for e2040Va

Page 1: ...Characteristics 10 5 2 Optical Characteristics 10 5 3 Parameter guide line for CCFL Inverter 10 6 Block Diagram 11 Table Of Contents 1 Revision List 2 1 Monitor Specification 4 2 LCD Monitor Description 6 3 Operation Instruction 9 3 1 General Instructions 9 3 2 Control Button 9 3 3 Adjusting the Picture 9 4 Input Output Specification 13 4 1 Input Signal Connector 13 4 2 Factory Preset Display Mode...

Page 2: ...haracteristics might 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 implied arising out of any unauthorized modification of design Servicer assumes all liability FOR PRODUCTS CONTAINING LASER DANGER Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM C...

Page 3: ...e Revision History Remark A00 May 20 2010 Initial release TAAGNRNQWWA25NE TAAGNRNQWWA15NE A01 Nov 30 2010 Add new model TAAGNRNQWWA45NE A02 Feb 22 2011 Add new models TAAGNT2QWWA35NE TAAGNT2QWWA45NE TAAMNT2QWWA15NE TAAMNT2QWWA25NE TAAMNT2QWWA55NE TAAMNT2QWWA65NE ...

Page 4: ...20 LCD Color Monitor AOC e2040Va 4 1 Monitor Specification ...

Page 5: ...20 LCD Color Monitor AOC e2040Va 5 ...

Page 6: ...t panel control logic brightness control logic and DDC The power part will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage AC IN 100V 240V Monitor Block Diagram Converter board Flat Panel and LED backlight Main Board RS232 Connector For white balance adjustment in factory mode LED Drive Video signal DDC HOST Computer Key Board Adapter Light S...

Page 7: ...20 LCD Color Monitor AOC e2040Va 7 View and Dimension ...

Page 8: ...20 LCD Color Monitor AOC e2040Va 8 ...

Page 9: ...t bar press or to adjust volume Only for the models with speakers 3 3 Adjusting the Picture OSD Setting 1 Press the MENU button to activate the OSD window 2 Press or to navigate through the functions Once the desired function is highlighted press the MENU button to activate sub menu Once the desired function is highlighted press MENU button to activate it 3 Press or to change the settings of the s...

Page 10: ... Select is disable to adjust 2 If the product screen size is 4 3 or input signal resolution is wide format the item of Image Ratio is disable to adjust 3 One of DCR Color Boost and Picture Boost functions is active the other two function is turned off accordingly Luminance Image Setup Color Temperature ...

Page 11: ...20 LCD Color Monitor AOC e2040Va 11 Color Boost Picture Boost OSD Setup Extra Reset Exit ...

Page 12: ...20 LCD Color Monitor AOC e2040Va 12 LED Indicator ...

Page 13: ...20 LCD Color Monitor AOC e2040Va 13 4 Input Output Specification 4 1 Input Signal Connector 4 1 1 D SUB connector 4 1 2 DVI connector ...

Page 14: ...20 LCD Color Monitor AOC e2040Va 14 4 2 Factory Preset Display Modes ...

Page 15: ...e LED backlight system The matrix employs a Si Thin Film Transistor as the active element It is a transmissive type display operating in the normally white mode It has a 20 0 inch diagonally measured active display area with HD resolution 900 vertical by 1600 horizontal pixel array Each pixel is divided into Red Green and Blue sub pixels or dots which are arranged in vertical stripes ...

Page 16: ...20 LCD Color Monitor AOC e2040Va 16 5 2 Optical Characteristics ...

Page 17: ...n 8 x 6 is displayed and fV is the frame frequency 2 The current is specified at the maximum current pattern 3 Permissive power ripple should be measured under VCC 5 0V 25 C fV frame frequency 75Hz condition and At that time we recommend the bandwidth configuration of oscilloscope is to be under 20MHz 4 The duration of rush current is about 5ms and rising time of power Input is 500us 20 2 Back Lig...

Page 18: ...20 LCD Color Monitor AOC e2040Va 18 6 Block Diagram 6 1 Software Flow Chart 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 19: ...n on the LED and set it to green color Scalar initialize 10 In standby mode 11 Update the lifetime of back light 12 Check the analog port are they re any signals coming 13 Does the scalar send out an interrupt request 14 Wake up the scalar 15 Are there any signals coming from analog port 16 Display No connection Check Signal Cable message And go into standby mode after the message disappear 17 Pro...

Page 20: ...ORY Pm25LD020C SCE U402 Scalar NT68668AFG Include MCU ADC OSD etc U401 LCD Interface CN301 D Sub Connector CN101 H sync V sync RGB EEPROM AT24C02BN U101 DDC1_SCL DDC1_SDA Crystal 12MHZ X401 DVI Connector CN102 EEPROM AT24C02BN U102 DDC2_SCL DDC2_SDA Key Control Interface CN401 DVI Input signal ...

Page 21: ...801 PWM Control MP3389EF U801 14 5V MOSFET Q806 DIM ENA L801 LED CN802 EMI filter Start Resistor R906 R934 PWM Control LD7750GS IC901 Transformer T901 AC input 12V 3A Bridge Rectifier and Filter Rectifier diodes Photo coupler IC902 Regulator IC903 Power Switch Q901 ...

Page 22: ...CN 5 U106 AOZ8105CI I O1 1 GND 2 I O2 3 I O3 4 VDD 5 I O4 6 DDC1_SCL 5 DDC1_SDA 5 DDC1_SDA VGA_B U105 AOZ8105CI I O1 1 GND 2 I O2 3 I O3 4 VDD 5 I O4 6 DDC_WP 5 U107 AOZ8105CI I O1 1 GND 2 I O2 3 I O3 4 VDD 5 I O4 6 FB102 0R05 1 10W 1 2 FB103 0R05 1 10W 1 2 FB101 0R05 1 10W 1 2 11 30 2009 11 30 2009 11 30 2009 DDC_WP 5 CN102 JACK DAT2 1 DAT2 2 2 4shield 3 DAT4 4 DAT4 5 DDC SCL 6 DDC SDA 7 VSYNC 8 ...

Page 23: ... 2009 R308 NC 10K1 16W CN301 CONN 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 PANEL_VCC Q302 LMBT3904LT1G R304 22K 1 16W R305 10K 5 1 16W CMVCC1 C302 22UF 16V U301 NC AO4411 S 1 S 2 S 3 G 4 D 8 D 7 D 6 D 5 LVACKM RXEC LVBCKM RXOC RXE2 LVA2M RXE1 LVA1M RXO3 LVB3M RXE0 LVA0M RXO0 LVB0M RXE3 LVA3M RXO1 LVB1M LVB2M RXO2 OEM MODEL Size Rev Date Sheet of TPV MO...

Page 24: ...4EN SW 1 EN 2 COMP 3 FB 4 GND 5 FREQ 6 VIN 7 BST 8 Thermal Pad 9 VCC3 3 11 30 2009 U701 VI 3 VO 2 GND 1 C723 10uF 25V C712 100nF 25V C719 100nF 25V CMVCC1 CN702 CONN 1 2 3 4 5 6 7 8 9 10 11 12 D707 SR34 1 2 D708 SR34 1 2 C717 100N 16V 2010 1 13 2010 1 13 2010 1 13 2010 1 13 BKLT EN FB702 BEAD 1 2 12V 12V 6 BKLT VBRI R707 0R05 1 10W BKLT EN R708 NC 0R05 1 10W 5 BKLT VBRI R702 10K 5 1 16W R703 10K 5...

Page 25: ...5 VCC1 8 4 119 ADC_VAA FB401 0R05OHM1 8W 115 52 adj_BACKLIGHT CMVCC1 DSUB_R 2 DSUB_G 2 DSUB_G 2 DSUB_B 2 DSUB_SOG 2 DSUB_V 2 DSUB_B 2 DSUB_H 2 LED_GRN BLUE DDC1_SDA 2 LED_ORANGE DDC1_SCL 2 RX2P 2 RX2N 2 RX1P 2 RX1N 2 PS_DISTANCE C428 47pF 50V VCC3 3 CMVCC1 R436 1K 1 16W R437 1K 1 16W KEY1 KEY2 RX0P 2 RX0N 2 RXCP 2 RXCN 2 DDC2_SDA 2 R413 10K 5 1 16W DET_CABLE 2 R412 10K 5 1 16W PPWR_ON 3 SPI_CE SPI...

Page 26: ... Pad 璶 TOP and Button常璶Τ R608 R611 R612 with audio NC POWER ON HI C627 NC 2009 12 14 2009 12 3 R618 10K 5 1 16W 2010 1 13 POWER OFF 2009 12 3 DEL C624 C625 2009 12 3 C626 1UF16V MUTE C627 1nF 50V C624 220P 50V OUT L C625 220P 50V C611 1UF16V OUT R MUTE R621 6 8K 1 1 16W C619 10U 10V FB604 120 OHM 1 2 OUT L FB601 120 OHM 1 2 AINR C616 10U 10V FB603 120 OHM 1 2 C605 1N 50V R622 1 24K 1 C613 1UF16V C...

Page 27: ... CN901 SOCKET 1 2 3 BD901 KBP306G 05 2 1 3 4 R901 1 MOHM 5 1 4W R902 1 MOHM 5 1 4W C903 0 47UF R940 220 OHM 1 10W C908 2N2 500V L902 14mH 1 4 2 3 L903 0 8uH R918 20K 1 10W 5 C920 1U 25V L901 0 45mH 1 4 2 3 C918 680UF 25V R941 1R5 1 8W 5 R916 11 5KOHM 1 1 8W C907 82uF 450V R911 2KOHM 1 10W R912 1K 1 10W R905 10K OHM 5 1 8W C910 100N 50V IC902 PC123X2YFZOF 1 2 4 3 IC903 KIA431A AT P C900 0 001uF 250...

Page 28: ...20 LCD Color Monitor AOC e2040Va 28 Converter 715G4082P01000004S ...

Page 29: ...DD 1 GP5 T1CKI P1A OSC1 CLKIN 2 GP4 AN3 CIN1 T1G P1B OSC2 CLKOUT 3 GP3 T1G MCLR VPP 4 GP2 AN2 T0CKI INT COUT CCP1 P1A 5 GP1 AN1 CIN0 VREF ICSPCLK 6 GP0 AN0 CIN P1B ICSPDAT 7 VSS 8 VCC VCC_IN OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME 称爹 T P V Top Victory Electronics Co Ltd Key Component 絬 隔 瓜 絪 腹 40TH A 40TH A 2 2 Friday April 16 2010 Power Sensor 称爹 PIC12F615 I SN G3995 T01 000 0040 1004...

Page 30: ...20 LCD Color Monitor AOC e2040Va 30 8 PCB Layout 8 1 Main Board 715G4002M01000004S ...

Page 31: ...20 LCD Color Monitor AOC e2040Va 31 8 2 Power Board Adapter 715G3980P02000003S ...

Page 32: ...20 LCD Color Monitor AOC e2040Va 32 Converter 715G4082P01000004S ...

Page 33: ...20 LCD Color Monitor AOC e2040Va 33 8 3 Key Board 715G4014K01000004C 8 4 Light Sensor Board 715G3995T01000004C ...

Page 34: ...C e2040Va 34 9 Maintainability 9 1 Equipments and Tools Requirement 1 Multi meter 2 Oscilloscope 3 Pattern Generator 4 DDC Tool with an Compatible Computer 5 Alignment Tool 6 LCD Color Analyzer 7 Service Manual 8 User Manual ...

Page 35: ... power key and look if the p cture is normal Please reinsert and make sure the AC of 100 240 is normal Measure U702 Vout 3 3V U704 Vout 1 8V Reinsert or check the power section X401 oscillate waveforms are normal Check U702 U704 CN702 Replace U401 Replace X401 OK OK OK NG NG NG NG No power ...

Page 36: ... Measure U702 Vout 3 3V U704 Vout 1 8V Replace U702 U704 CN702 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable is connected normally Input the sync signal of computer or change the cable Replace U401 NG OK ...

Page 37: ...easure Q302 base is low level X401 oscillate waveform is normal Check FB301 Q301 is broken or CN301 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 ...

Page 38: ...07 Check bridge rectified circuit and F901 circuit Check start voltage for the pin8 of IC901 Check R906 R934 Change IC901 NG Check the auxiliary voltage is bigger than 10V and smaller than 20V 1 Check IC901 2 Check OVP circuit OK OK NG Check Q901 IC902 IC903 D902 D903 D906 LED1 OK Check IC901 pin5 6 PWM wave OK Check IC901 NG NG OK NG ...

Page 39: ...ht Check U801 12V Check MB and Q806 Check ON OFF signal Check main board Check Q806 PIN5 6 7 8 14 5V Change Q806 Check U801 Pin15 16 17 18 19 20 have the output of square wave at short time Check IC80 Check conecter lamp feedback and protect circuit ...

Page 40: ...40 9 2 3 Key Board OK OK OSD is unstable or not working Is Keypad board connecting normally Is Button Switch normally Is Keypad board normally Check main board Connect Keypad Board Replace Button Switch Replace Keypad Board NG NG NG OK ...

Page 41: ...LCD Color Monitor AOC e2040Va 41 10 Firmware and DDC Instruction ISP DDC writing SOP Please land ftp cs tpv com cn to load relevant writing SOP in the related files Accounts TPVSQZ Code TPVZGDLSQZ20090707 ...

Page 42: ... with press MODE button 2 Switch the MEM channel to Channel 4 with up or down arrow on chroma 7120 3 The LCD indicator on chroma 7120 will show x 313 30 y 329 30 4 Adjust the RED on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN on factory window until chroma 7120 indicator reached the value G 100 6 Adjust the BLUE on factory window until chroma 7120 indicato...

Page 43: ...hroma 7120 RGB value meet the tolerance 100 5 D Adjust sRGB color temperature 1 Switch the chroma 7120 to RGB Mode with press MODE button 2 Switch the MEM channel to Channel 4 with up or down arrow on chroma 7120 3 The LCD indicator on chroma 7120 will show x 313 30 y 329 30 4 Adjust the RED on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN on factory window ...

Page 44: ...20 LCD Color Monitor AOC e2040Va 44 12 Monitor Exploded View ...

Page 45: ...zil Reg E09504 095G176J 4E01 FFC CABLE 4PIN P1 0MM 260MM E09501 095G8018 3TE36 HARNESS 30P 30P 330MM E09503 095G8022 5TE01 HARNESS 5P A1253 5P A1253 260MM E09502 095G8022 7TE01 HARNESS 7P 6P 130MM E09505 095G802210TE01 HARNESS 10P A1253 10P A1253 90MM 0D1G1730 8120 SCREW 0Q1G 130 8120 SCREW 42A9930011 0Q1G 130 8120 SCREW 42A9930011 0Q1G 140 10120 SCREW E750 750GLG200W3A13N000 PANEL LM200WD3 TLA1 G...

Page 46: ...4L EC 680UF 20 25V RZW 8 20 C918 067G 515681 4L EC 680UF 20 25V RZW 8 20 C907 067G515Z82015L EC 82UF 20 450V RXQ 18 31 5 D902 071G 55 30 FERRITE BEAD 4 0 2 3 D903 071G 55 30 FERRITE BEAD 4 0 2 3 L902 073G 174514 X LINE FILTER 14mH MIN L901 073G 174515 X LINE FILTER 0 45mH MIN L903 073G 253902 H IND CHOKE 0 8uH MIN DADO LED1 081G 2 3 1P LED GPG2603T R006 35A GUANGPU E08906 089G 171536 G DC CABLE 12...

Page 47: ...102 JF RST CHIPR 1K OHM 5 1 10W FENGHUA R940 061G0603102 JT RST CHIP 1K 1 10W 5 TZAI YUAN R918 061G0603103 JT RST CHIP 10K 1 10W 5 TZAI YUAN R911 061G0603202 JT RST CHIPR 2KOHM 1 10W TZAI YUAN R919 061G06034532FF RST CHIPR 45 3KOHM 1 1 10W FENGHUA R905 061G08051002FF RST CHIPR 10KOHM 1 1 8W FENGHUA R903 061G08051004FT RST CHIP R 1 MOHM 1 1 8W R942 061G0805101 JT RST CHIP 100R 1 8W 5 TZAI YUAN R910...

Page 48: ...3 11 IC Pm25LD020C SCE SIOC 8 150mil 2M Q401 057G 417517 Tra LMBT3906LT1G 200mA 40V SOT 23 LRC Q402 057G 417517 Tra LMBT3906LT1G 200mA 40V SOT 23 LRC Q603 057G 417517 Tra LMBT3906LT1G 200mA 40V SOT 23 LRC Q302 057G 417518 TRA LMBT3904LT1G 200mA 40V SOT 23 LRC Q604 057G 417518 TRA LMBT3904LT1G 200mA 40V SOT 23 LRC Q701 057G 417518 TRA LMBT3904LT1G 200mA 40V SOT 23 LRC Q301 057G 763940 MOSFET AO3401...

Page 49: ...402103 JY RST CHIPR 10KOHM 5 1 16W YAGEO R618 061G0402103 JY RST CHIPR 10KOHM 5 1 16W YAGEO R702 061G0402103 JY RST CHIPR 10KOHM 5 1 16W YAGEO R703 061G0402103 JY RST CHIPR 10KOHM 5 1 16W YAGEO R705 061G0402103 JY RST CHIPR 10KOHM 5 1 16W YAGEO R412 061G0402103 JY RST CHIPR 10KOHM 5 1 16W YAGEO R413 061G0402103 JY RST CHIPR 10KOHM 5 1 16W YAGEO R614 061G0402104 JY RST CHIPR 100KOHM 5 1 16W YAGEO R...

Page 50: ...JY RST CHIP 9K1 1 16W 5 YAGEO R707 061G0603000 JF RST CHIPR MAX 0R05 1 10W FENGHUA R617 061G0603000 JF RST CHIPR MAX 0R05 1 10W FENGHUA R102 061G0603000 JF RST CHIPR MAX 0R05 1 10W FENGHUA FB703 061G0603000 JF RST CHIPR MAX 0R05 1 10W FENGHUA FB605 061G0603000 JF RST CHIPR MAX 0R05 1 10W FENGHUA FB103 061G0603000 JF RST CHIPR MAX 0R05 1 10W FENGHUA FB102 061G0603000 JF RST CHIPR MAX 0R05 1 10W FEN...

Page 51: ...100N 16V X7R 10 C603 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C602 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C438 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C437 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C435 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C434 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C433 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C432 065G040210412K ...

Page 52: ...G060322131J Y CAP CHIP 0603 220P 50V NPO 5 C623 065G060322131J Y CAP CHIP 0603 220P 50V NPO 5 C624 065G060322131J Y CAP CHIP 0603 220P 50V NPO 5 C625 065G060322131J Y CAP CHIP 0603 220P 50V NPO 5 C616 065G0805106A7Z A CAP 0805 10UF Z 10V Y5V C619 065G0805106A7Z A CAP 0805 10UF Z 10V Y5V C439 065G0805475A2K Y CAP CHIP 0805 4 7UF K 10V X7R C423 065G0805475A2K Y CAP CHIP 0805 4 7UF K 10V X7R C421 065...

Page 53: ...10W FENGHUA R822 061G0603103 JF RST CHIPR 10K OHM 5 1 10W FENGHUA R802 061G06032003FF NO SUGGEST RST CHIPR 200KOHM 1 10W FENGH R810 061G0603203 JF RST CHIPR 20K OHM 5 1 10W FENGHUA R807 061G0603203 JF RST CHIPR 20K OHM 5 1 10W FENGHUA R803 061G06035602FF RST CHIPR 56KOHM 1 1 10W FENGHUA R809 061G06036801FF RST CHIPR 6 8KOHM 1 1 10W FENGHUA R828 061G0805109 JT RST CHIP 1R 1 8W 5 TZAI YUAN R827 061G...

Page 54: ...1G0402472 JY RST CHIPR 4 7KOHM 5 1 16W YAGEO R023 061G0805330 JT RST CHIP 33R 1 8W 5 TZAI YUAN R018 061G0805330 JT RST CHIP 33R 1 8W 5 TZAI YUAN C020 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C018 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C017 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C016 065G040210412K Y CAP CHIP 0402 100N 16V X7R 10 C015 065G040210412K Y CAP CHIP 0402 100N 16V X7...

Page 55: ...3000 FF RST CHIPR MAX0R01 1 10W FENGHUA R004 061G06031001FF RST CHIPR 1KOHM 1 1 10W FENGHUA R001 061G06032001FF RST CHIPR 2KOHM 1 1 10W FENGHUA R003 061G06032001FF RST CHIPR 2KOHM 1 1 10W FENGHUA C001 065G060310432K A CAP CHIP 0603 100nF K 50V X7R C002 065G060310432K A CAP CHIP 0603 100nF K 50V X7R LED001 081G 14 12 GP CHIP LED GPTD1210YBC5 D E715 715G4014K01000004C KEY BOARD PCB E715 715G4014K010...

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