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AOC 719Pa, Service Manual

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AOC 719Pa Service Manual Download Page 36

17" LCD Color Monitor                       

                                                                                AOC 719Pa 

36                                                                                                                 

8.2 Trouble Shooting 

8.2.1 Main Board 

(1). 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 

Reinsert or check the 
power section

X401 oscillate waveforms are 
normal 

Measure U201 Pin2=3.3V 

OK 

OK 

NG

NG 

NG

Replace U201 

Check U401 

Replace X401 

OK 

NG

Replace U501 

Replace U401   

OK 

NG

Summary of Contents for 719Pa

Page 1: ...nstruction 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 Power Supply Requirements 12 4 3 Factory Preset Display Mo...

Page 2: ...17 LCD Color Monitor AOC 719Pa 2 Revision List Version Release Date Revision History TPV Model Name A00 July 07 2008 Initial release T78SRHDBK1A1DN...

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: ...preset resolution 1280 x 1024 60 Hz Highest preset resolution 1280 x 1024 75 Hz Plug Play VESA DDC2B CI Input Connector D Sub 15pin DVI D Input Video Signal Analog 0 7Vp p standard 75 OHM Positive DVI...

Page 5: ...17 LCD Color Monitor AOC 719Pa 5 Non Operating 5 to 80 non condensing Altitude Operating 0 3000m 0 10000 ft Non Operating 0 5000m 0 15000 ft...

Page 6: ...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 HOST Computer AC IN 100V 240V...

Page 7: ...trol knobs are located at front panel of the monitor See Figure By changing these settings the picture can be adjusted to your personal preferences The power cord should be connected Press the power b...

Page 8: ...button to turn the monitor on To un lock the OSD press and hold the Menu button while the monitor is off and then press power button to turn the monitor on Eco Mode hot key Press the Eco key continuou...

Page 9: ...e dynamic contrast ratio Image Setup Clock 0 100 Adjust picture Clock to reduce Vertical Line noise Phase 0 100 Adjust Picture Phase to reduce Horizontal Line noise H Position 0 100 Adjust the vertica...

Page 10: ...off Disable or Enable Bright Frame OSD Setup Position 0 100 Adjust the horizontal position of OSD V Position 0 100 Adjust the vertical position of OSD Timeout 5 120 Adjust the OSD Timeout Transparenc...

Page 11: ...C Serial Clock 8 GND B VGA connector layout DVI connectors Pin No Description Pin No Description Pin No Description 1 TMDS Data 2 9 TMDS Data 1 17 TMDS Data 0 2 TMDS Data 2 10 TMDS Data 1 18 TMDS Data...

Page 12: ...ion or defect with a maximum of 1 half wave missing per second DC output Voltage 5VDC 5 12VDC 5 Current 1 5Amp 5V 2 Amp 12V 4 3 Factory Preset Display Modes Stand Resolution Horizontal Frequency kHz V...

Page 13: ...a TFT LCD panel a driver circuit and a back light unit The resolution of a 17 0 is 1280x 1024 and this model can display up to 16 7 millions colors RoHS compliance Pb free High contrast ratio high ape...

Page 14: ...17 LCD Color Monitor AOC 719Pa 14 4 4 3 Electrical Characteristics 1 TFT LCD 2 Backlight...

Page 15: ...17 LCD Color Monitor AOC 719Pa 15 4 4 4 Optical Characteristics...

Page 16: ...17 LCD Color Monitor AOC 719Pa 16 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 17: ...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 18: ...5LH GR Include ADC OSD U501 H sync V sync RGB EPR_SDA EPR_SCL LCD Interface CN601 Crystal 24MHz X401 MCU RTD2120L LF U401 CRYSTAR_OUT DDC1_SCL DDC1_SDA D Sub Connector CN301 DVI Connector CN302 D Data...

Page 19: ...DIM DIM EMI filter Start Circuit R904 R905 R906 PWM Control IC Transformer AC input 16V ON OFF Control PWM Control IC Feedback Circuit Output Circuit Transformer MOSFET Over Voltage Lamp ON OFF 5V Br...

Page 20: ...POWER_KEY 4 LED_G 1 2 ZD201 NC KEY0 KEY1 4 C210 0 1uF 16V Q205 PMBS3906 CMVCC CMVCC LED_R 4 LED_G 4 Back light Dimming 0 5V 3V Panel ID 0 5V 3V C205 0 1uF 16V 1 2 3 4 5 6 7 8 9 CN201 CONN C206 0 1uF 1...

Page 21: ...5 UDZS5 6B R303 100R 1 16W 5 3 1 2 D301 BAV99 DDC2_SCL R305 2K2 1 16W C302 33pF R304 2K2 1 16W 1 2 ZD304 UDZS5 6B R314 75R 1 16W R312 100R 1 16W 5 DSUB_5V 3 1 2 D303 BAV99 R302 0R05 1 16W R315 100R 1...

Page 22: ...DSUB_V 3 MCU_VCC C408 NC R421 NC FB401 150 OHM MCU_RESET R436 10K 1 16W 5 HPD_CTL 5 R409 100R 1 16W 5 R408 100R 1 16W 5 R406 10K 1 16W 5 C405 10uF 50V R405 10K 1 16W 5 R427 NC DSUB_V DSUB_V1 R435 100R...

Page 23: ...9 6 LVDS_E 0 9 6 715G2507 2 K RTD_SD3 SDI VCC3 RTD_SCLK RXO0 VCC3 VCC3 RTD_V 3 RTD_H 3 RTD_B 3 RTD_B 3 RTD_G 3 RTD_R 3 RTD_G 3 RTD_R 3 CRYSTAR_OUT 4 RTD_DDCSCL RTD_DDCSDA RTD_SCLK 4 DDC2_SCL 4 RTD_SD3...

Page 24: ...RXO3 PANEL_VCC PANEL_VCC LVDS_O7 RXOC LVDS_O2 RXO1 LVDS_O3 RXO1 LVDS_O6 RXOC RXO2 LVDS_O5 RXO2 LVDS_O4 LVDS_E5 RXE2 LVDS_E 0 9 5 LVDS_O 0 9 5 LVDS_E0 RXE0 LVDS_E8 RXE3 R602 330R 1 8W 5 LVDS_E9 RXE3 C6...

Page 25: ...13 C915 470uF16V C906 1500pF2KV C901 1000PF 250VAC R962 100 OHM 1 4W R925 1K 1 8W R926 1K 1 10W 1 C940 0 1uF FB904 BEAD 1 2 L905 C939 1000uF25V ZD922 RLZ5 6B 1 2 R904 300K OHM 1 4W 16V L903 C905 100u...

Page 26: ...uF 25V D814 NC SM260A 2A 60V 1 2 D813 NC LL4148 C806 1uF 16V ZD801 NC RLZ6 8C 1 2 R820 560K OHM 1 10W R812 1 5K 1 8W R822 47K 1 10W R811 1 5K 1 8W C802 1uF 16V VSC VX2262WM R815 33K 1 10W C803 1500PF...

Page 27: ...47uF 16V R607 6 2KOHM 5 1 10W CN602 CONN 1 2 3 4 Rin R605 10K 1 10W 5 VOL R601 10K 1 10W 5 LOUT LOUT MUTE C604 100uF 25V C609 1uF 25V 5V1 ROUT HS1 IC with Heat sink 90G6295 3 1 2 PWPC8742SYJ1 D Custo...

Page 28: ...17 LCD Color Monitor AOC 719Pa 28 6 3 Key Board 715G2835 1...

Page 29: ...17 LCD Color Monitor AOC 719Pa 29 7 PCB Layout 7 1 Main Board 715G2507 2 K...

Page 30: ...17 LCD Color Monitor AOC 719Pa 30...

Page 31: ...17 LCD Color Monitor AOC 719Pa 31 7 2 Power Board 715G2824 1 2...

Page 32: ...17 LCD Color Monitor AOC 719Pa 32...

Page 33: ...17 LCD Color Monitor AOC 719Pa 33...

Page 34: ...17 LCD Color Monitor AOC 719Pa 34 7 3 Key Board 715G2835 1...

Page 35: ...719Pa 35 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 36: ...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 power section X401 oscillate waveforms are normal Measure U201 Pin2 3...

Page 37: ...asure U201 PIN2 3 3V Replace U201 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 compu...

Page 38: ...is low level X401 oscillate waveform is normal Check Correspondent component Replace Panel Check Correspondent component Replace U501 OK Replace X401 NG NG NG Check reset circuit of U501 is normal OK...

Page 39: ...f C905 Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901 Check R904 R905 R906 and Change IC901 NG Check the auxiliary voltage is bigger than 10V and smaller tha...

Page 40: ...Check Interface board NG OK Check IC801 PIN2 5V NG OK Check Q801 and Q802 Check IC801 PIN1 15 have the output of square wave at short NG OK Change IC801 Check Q804 and Q809 PIN5 6 7 8 have the output...

Page 41: ...1 8 2 3 Key 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 42: ...temp parameter is x 283 30 y 297 30 Y 130cd m2 D MEM CHANNEL 10 sRGB color sRGB color temp parameter is x 313 30 y 329 30 Y 150cd m2 3 Into Factory mode of AOC 719Pa Press the MENU button pull out th...

Page 43: ...00 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 indicator reached the value B 100 7 Repeat above proce...

Page 44: ...17 LCD Color Monitor AOC 719Pa 44 10 Monitor Exploded View...

Page 45: ...5W 43X18 240 300mm SUNLINK 089G 725HAA DB D SUB 089G1745HAA AC DVI CABLE 089G404A15N IS POWER CORD E09502 095G8014 6XH10 WIRE HARNESS 140MM 0M1G 130 5120 SCREW 0M1G1730 6120 SCREW 42 D020523 0M1G1740...

Page 46: ...10 OHM 5 1 16W R320 061G0402100 RST CHIPR 10 OHM 5 1 16W R319 061G0402100 RST CHIPR 10 OHM 5 1 16W R318 061G0402100 RST CHIPR 10 OHM 5 1 16W R434 061G0402101 RST CHIPR 100 OHM 5 1 16W R433 061G040210...

Page 47: ...061G0402103 RST CHIPR 10 KOHM 5 1 16W R213 061G0402103 RST CHIPR 10 KOHM 5 1 16W R210 061G0402103 RST CHIPR 10 KOHM 5 1 16W R601 061G0402103 RST CHIPR 10 KOHM 5 1 16W R438 061G0402103 RST CHIPR 10 KOH...

Page 48: ...065G0402104 15 MLCC 0402 0 1UF K 16V X5R C205 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C206 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C209 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C210 065G0402104 15 M...

Page 49: ...OHM 25 FB401 071G1608151 5Y CHIP BEAD 1608 150 OHM 25 FB501 071G1608151 5Y CHIP BEAD 1608 150 OHM 25 D314 093G 64 33 DIO SIG SM BAV99 PHSE R D311 093G 64 33 DIO SIG SM BAV99 PHSE R D309 093G 64 33 DI...

Page 50: ...SPB 2 NP D001 081G 12 1F GH 1ED 3Pin 3 GHZYG603D2 5B R003 061G0603000 1F RST CHIPR 0 OHM 1 1 10W R005 061G0603100 1F RST CHIPR 1 KOHM 1 1 10W R004 061G1206200 1F RST CHIPR 2 0 KOHM 1 1 4W R002 061G120...

Page 51: ...510 DN X FMR INVERTER 142uH T802 080GL20T510 DN X FMR INVERTER 142uH T901 080GL22T 3 N X FMR 510uH YUVA 822 CN901 087G 501 32 S AC SOCKET CN601 088G 30214K DC PHONE JACK 5PIN BD901A 093G 50460 28 BRID...

Page 52: ...1G0603100 2F RST CHIPR 10K OHM 1 1 10W R838 061G0603100 2F RST CHIPR 10K OHM 1 1 10W R833 061G0603100 2F RST CHIPR 10K OHM 1 1 10W R831 061G0603100 2F RST CHIPR 10K OHM 1 1 10W R824 061G0603100 2F RST...

Page 53: ...ST CHIPR 75KOHM 1 1 10W RJ610 061G0805000 RST CHIPR 0 OHM 5 1 8W R832 061G0805000 RST CHIPR 0 OHM 5 1 8W R830 061G0805000 RST CHIPR 0 OHM 5 1 8W R804 061G0805000 RST CHIPR 0 OHM 5 1 8W R801 061G080500...

Page 54: ...206101 RST CHIPR 100 OHM 5 1 4W R920 061G1206101 RST CHIPR 100 OHM 5 1 4W R919 061G1206101 RST CHIPR 100 OHM 5 1 4W R918 061G1206101 RST CHIPR 100 OHM 5 1 4W R901 061G1206105 1M 1206 R902 061G1206105...

Page 55: ...065G0805104 32 CAP CHIP 0805 0 1uF K 50V X7R C924 065G0805104 32 CAP CHIP 0805 0 1uF K 50V X7R C907 065G0805104 32 CAP CHIP 0805 0 1uF K 50V X7R C608 065G0805105 22 CAP CHIP 0805 1uF K 25V X7R C609 06...

Page 56: ...S R914 061G152M39852T RST MOFR 0 39 OHM 5 2WS C906 065G 2K152 1T6213 CAP CER 1500PF K 2KV C604 067G215Y1014KT EC CAP 105 C908 067G215Y2207KT CAP 105 22UF M 50V KINGNICHI C605 067G215Y2207KT CAP 105 22...

Page 57: ...23 JUMPER J905 095G 90 23 JUMPER J904 095G 90 23 JUMPER J903 095G 90 23 JUMPER J902 095G 90 23 JUMPER J901 095G 90 23 JUMPER J823 095G 90 23 JUMPER J822 095G 90 23 JUMPER J821 095G 90 23 JUMPER J820 0...

Page 58: ...088A PLASTIC SLIPSHEET Q45G 77 5 PE PACKING Q45G 88607 34 PE BAG FOR BASE Q45G 88609 91 EPE BAG FOR MONITOR Q52G 1185 99 BIG CARTON TAPE FOR AOC S89G179T30N577 LVDS ASS Y 089F80002603AG 1 0 30 2 5 260...

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