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AOC WLA184TWE, Service Manual

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AOC WLA184TWE Service Manual Download Page 29

18.5" LCD Color Monitor                                                                                  AOC WLA184TWE 

29                                                                                                                  

8.2 Trouble Shooting 

1. No 

Power 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

OK 

NG

No power

 

Check power cable is 

tightened? 

Check Power “On/Off” 

is “On”? 

Re-plug the power cable 

Replace main board and check connections 

Check the LED 

indicator is OK? 

Check the AC power   

Replace the power board and check connections 

OK 

NG

OK 

NG

NG

Turn on the Power “On/Off” switch 

Replace key board and check connections 

NG 

Summary of Contents for WLA184TWE

Page 1: ...ription 5 3 Operation Instructions 6 3 1 General Instructions 6 3 2 Control Buttons 6 3 3 Adjusting the Picture 8 4 Input Output Specification 10 4 1 Input Signal Connector 10 4 2 Factory Preset Displ...

Page 2: ...18 5 LCD Color Monitor AOC WLA184TWE 2 Revision List Version Release Date Revision History TPV Model Name A00 June 26 2012 Initial release T8VWSY6EX8WNAN...

Page 3: ...characteristics 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...

Page 4: ...75 OHM Positive Maximum Screen Size Horizontal 409 8mm Vertical 230 4mm Power Source 100 240VAC 50 60Hz 1 5A Environmental Considerations Operating Temp 0 to 40 C Storage Temp 25 to 55 C Operating Hum...

Page 5: ...rol 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 Video signal DDC Power Board Fla...

Page 6: ...rom the monitor to the video card Press the power button to turn on the monitor position The power indicator will light up 3 2 Control Buttons EXTERNAL CONTROLS 1 Auto Adjust button Exit 2 ECO 3 Volum...

Page 7: ...he monitor in a location near heat sources such as radiators or air dusts or in a place subject to direct sunlight or excessive dust or mechanical vibration or shock Save the original shipping carton...

Page 8: ...ted press MENU button to activate it 3 Press or to change the settings of the selected function 4 To exit and save select the exit function If you want to adjust any other function repeat steps 2 3 AD...

Page 9: ...or Enable Full Enhance Mode Nature Skin on or off Disable or Enable Nature Skin Mode Green Field on or off Disable or Enable Green Field Mode Sky blue on or off Disable or Enable Sky blue Mode AutoDet...

Page 10: ...nc 7 VGA_G 15 DSUB_SCL 8 VGA_B 4 2 Factory Preset Display Modes STANDARD RESOLUTION HORIZONTAL VERTICAL FREQUENCY KHz FREQUENCY Hz VGA 640 480 60Hz 31 469 59 94 640 480 72Hz 37 861 72 809 640 480 75Hz...

Page 11: ...768 WXGA mode and can display up to 16 7M colors The inverter module for Backlight is not built in 4 3 1 General Feature Contrast ratio 1000 1 typ 600 1 min Response time 5ms Brightness 200nits Resolu...

Page 12: ...18 5 LCD Color Monitor AOC WLA184TWE 12 4 3 4 ELECTRICAL CHARACTERISTICS Ta 25 2 C 4 3 5 BACKLIGHT UNIT Ta 25 2 C 4 3 6 BLOCK DIAGRAM...

Page 13: ...BLE DSUB_H DSUB_SOG DDC1_SDA DDC1_SCL CMVCC1 EDID_CTRL 03 Scalar DSUB_R DSUB_G DSUB_SOG DSUB_B DSUB_R DSUB_G DSUB_B DSUB_H DSUB_V Adj_BACKLIGHT VCC1 8 VCC3 3 PA 0 1 PB 0 9 DDC1_SDA DDC1_SCL DET_CABLE...

Page 14: ...r and Filter Start Circuit R908 PWM Control IC Transformer Diode rectifier Filter AC input Transformer T901 Inverter Connector ON OFF Feedback Circuit Over Voltage Protect MOSFET Q901 PWM Control IC F...

Page 15: ...5 R109 390R 1 16W 1 C101 47nF 16V R116 75 OHM 5 1 16W R114 100R 1 16W 5 GND POWER DSUB_5V DGND R122 NC ESD_5V H_Sy nc DSUB_SDA DDC1_SDA 5 C434 0 22uF ESD_5V ESD_5V DSUB_H 5 DSUB_V 5 DET_CABLE 5 DSUB_R...

Page 16: ...or NVRAM NC R455 NC NC 10K 1 16W 5 C419 U403 100R 1 16W 5 10K 1 16W 5 R451 R425 C418 depend on case R424 NC PANEL_ID and POWER_KEY could be optional When NVRAM is used POWER_KEY and PANEL_ID will not...

Page 17: ...3 5 7 9 11 13 15 17 19 21 23 25 27 29 CN405 CONN PB5 PB0 PB6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 CN403 NC CONN PA1 PA0 C420 100N 16V PANEL_VCC R499 10 OHM...

Page 18: ...1 16W FB403 NC ADJ GND 1 VOUT 2 VIN 3 U405 NC AP1117D33L 13 R446 NC R439 10K1 16W Q406 Tra MMBT3904G C425 NC R448 NC 4 7K1 16W C422 100N 16V R449 NC C428 100N 16V CMVCC MVCC VCC3 3 VCC3 3 VCC3 3 VCC3...

Page 19: ...P0765ATF R915 22 OHM 1 4W 5 R903 100 OHM 1 4W F903 FUSE C921 NC 1000uF25V 1 2 3 CN901 SOCKET R909 100 OHM 1 4W R930 100 OHM 1 4W 1 2 t NR901 NTCR R905 470OHM 5 1 8W C916 2 2N 630V R919 220 OHM 1 8W C...

Page 20: ...15 1N 50V 1 2 FB801 BEAD C803 1N 50V ISEN1 13 ISEN2 14 GND 15 ISEN3 16 ISEN4 1 ISET 2 OVP 3 RT 4 ENA 5 ISW 6 LDR 7 VREF 8 VIN 9 STATUS 10 SSTCMP 11 PWM 12 U801 OZ9998BGN S1 1 G1 2 S2 3 G2 4 D2 5 D2 6...

Page 21: ...M1 8W C610 100P 50V C606 0 47uF 16V C601 0 47uF 16V R605 10K 1 10W 5 C603 0 47uF 16V C604 470UF M 16V C609 1U 25V C602 0 47uF 16V C611100P 50V 5V1 R604 10K 1 10W 5 R602 10K 1 10W 5 C608 1U 25V 1 2 3 5...

Page 22: ...4 5 6 7 8 CN001 CONN DC_POWERON LED_1 C003 100nF 50V DOWN LBADC2 OK OK DOWN 2K UP 0 CONNECTOR LED MENU Power 1 3 5 2 4 6 8 7 9 10 SW001 SW UP 2 0K LBADC1 1 042V 1 435V MENU LED_2 R004 2KOHM 1 1 10W R0...

Page 23: ...18 5 LCD Color Monitor AOC WLA184TWE 23 7 PCB Layout 7 1 Main Board 715G3959M010020H4K...

Page 24: ...18 5 LCD Color Monitor AOC WLA184TWE 24...

Page 25: ...18 5 LCD Color Monitor AOC WLA184TWE 25...

Page 26: ...18 5 LCD Color Monitor AOC WLA184TWE 26 7 2 Power Board 715G4497P010060H1S...

Page 27: ...18 5 LCD Color Monitor AOC WLA184TWE 27 7 3 Key Board 715G3584K010040H4K...

Page 28: ...WLA184TWE 28 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 Se...

Page 29: ...er cable is tightened Check Power On Off is On Re plug the power cable Replace main board and check connections Check the LED indicator is OK Check the AC power Replace the power board and check conne...

Page 30: ...Power LED is Blue Press the power button is OK Check the LVDS FFC cable or panel The end NG OK OK NG Replace the main board Replace the power board and connection Replace the LVDS FFC cable or panel N...

Page 31: ...er Reset in factory mode Set to the optimal frequency select the recommended frequency Pull out signal cable and check Self Test Feature Check is ok Check the signal cable and the PC Readjust the phas...

Page 32: ...al Miss color Color shift Replace the signal cable Pull out the signal cable and check the screen color display is normal The end Replace the signal cable or PC Reset the factory mode In the user mode...

Page 33: ...m2 B MEM CHANNEL 4 Normal color Normal color temp parameter is x 302 30 y 318 30 Y 150cd m2 C MEM CHANNEL 9 Cool color Cool color temp parameter is x 283 30 y 297 30 Y 130cd m2 D MEM CHANNEL 10 sRGB c...

Page 34: ...20 will show x 283 30 y 297 30 Y 130cd m2 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 reache...

Page 35: ...18 5 LCD Color Monitor AOC WLA184TWE 35 9 Monitor Exploded View...

Page 36: ...Y BOARD 1 5 NA PANEL 1 6 0G1G1030 6120 SCREW 4 7 0G1G1030 6120 SCREW 1 8 NA POWER BOARD 1 9 NA MAIN BOARD 1 10 NA SPEAKER 2 11 NA MAIN_FRAME 1 12 NA REAR COVER 1 13 NA HINGE 1 14 NA COVER_ STAND 1 15...

Page 37: ...0 160 2nd source ECN403 395G801830XH8600HF HF HARNESS 30P 30P A2004 100 2nd source 708G8038 CP OTS 40 2592 050G 600 2 HANDLE1 050G 600 3 HANDLE2 052G 1185 1 BIG TAPE Y1200141 Q45G 77 5 PE PACKING Q50G...

Page 38: ...TON WLA184TWE Q45G 88609203 N EPE BAG Q52G1001211 B ZA AL FOIL ECN403 S95G801830SH8600HF HARNESS 30P 30P 100MM 033F303SM24K30 HF PK2407P30 S 033F204H 30 HF A2004H 2 15P HF 033F303TTD1 TD00 T 2407PS 00...

Page 39: ...000 JI RST 0402 0 05R MAX 1 16W R487 061G0402000 JI RST 0402 0 05R MAX 1 16W R467 061G0402000 JI RST 0402 0 05R MAX 1 16W R402 061G0402000 JI RST 0402 0 05R MAX 1 16W R401 061G0402000 JI RST 0402 0 05...

Page 40: ...ST CHIP 100R 1 16W 5 TZAI YUAN R424 061G0402101 JT RST CHIP 100R 1 16W 5 TZAI YUAN R117 061G0402101 JT RST CHIP 100R 1 16W 5 TZAI YUAN R115 061G0402101 JT RST CHIP 100R 1 16W 5 TZAI YUAN R114 061G0402...

Page 41: ...P 2K2 1 16W 5 TZAI YUAN R106 061G0402222 JY RST CHIPR 2 2KOHM 5 1 16W YAGEO R105 061G0402222 JY RST CHIPR 2 2KOHM 5 1 16W YAGEO R443 061G0402223 JF RST CHIPR 22KOHM 5 1 16W FENGHUA R443 061G0402223 JT...

Page 42: ...O R471 061G0603511 JT RST CHIP 510R 1 10W 5 TZAI YUAN R456 061G1206000 JF RST CHIPR MAX0R05 1 4W FENGHUA R456 061G1206000 JT RST CHIPR MAX0R05 1 4W TZAI YUAN R434 061G1206151 JF RST CHIPR 150 OHM 5 1...

Page 43: ...415K M CAP 0402 220NF 10 16V X5R C117 065G040222415K M CAP 0402 220NF 10 16V X5R C117 065G040222415K T CAP CHIP 0402 220NF K 16V X5R C408 065G040222415K T CAP CHIP 0402 220NF K 16V X5R C424 065G040222...

Page 44: ...64X1 6MM KEPCBQHS KEY BOARD SW001 077G 500 5J XL DOME SWITCH 5PCS CN001 033G8032 6F HR HF HF CONN 1 25MM 10P R A A1253WRA S 06PN11 R003 061G0603000 JI RST 0603 0 05R MAX 1 10W TA I R003 061G0603000 JT...

Page 45: ...13LV LOW ESR EC 470UF 16V M 10 12 5MM C604 067G215V471 3H CAP L105C 470UF M 16V C907 067G315Z10115K EC 100UF 20 450V 18 40 3000 HR L901 073G 174 65 H2 HF LINE FILTER 30MH MIN LCL 12018 HA HF L901 073G...

Page 46: ...R 10KOHM 5 1 10W YAGEO R604 061G0603103 JY RST CHIPR 10KOHM 5 1 10W YAGEO R605 061G0603103 JY RST CHIPR 10KOHM 5 1 10W YAGEO R609 061G0603103 JY RST CHIPR 10KOHM 5 1 10W YAGEO R607 061G0603153 JT RST...

Page 47: ...00KOHM 1 1 8W FENGHUA R815 061G08051003FT RST CHIP 100K 1 8W 1 R806 061G0805102 JF RST CHIPR 1K OHM 5 1 8W FENGHUA R907 061G0805102 JF RST CHIPR 1K OHM 5 1 8W FENGHUA R806 061G0805102 JT RST CHIPR 1K...

Page 48: ...HUA RJ602 061G1206000 JF RST CHIPR MAX0R05 1 4W FENGHUA RJ603 061G1206000 JF RST CHIPR MAX0R05 1 4W FENGHUA RJ604 061G1206000 JF RST CHIPR MAX0R05 1 4W FENGHUA RJ604 061G1206000 JI RST 1206 MAX0R05 5...

Page 49: ...RST CHIPR 0 3 OHM 5 1 4W FENGHUA R813 061G1206308 JF RST CHIPR 0 3 OHM 5 1 4W FENGHUA R812 061G1206308 JI RST CHIPR 0 3 OHM 5 1 4W 1206 R813 061G1206308 JI RST CHIPR 0 3 OHM 5 1 4W 1206 R813 061G12063...

Page 50: ...P 0805 100P 50V NP0 5 C923 065G080510232K A MLCC 0805 1NF 50V X7R 10 SAMSUNG C803 065G080510232K A MLCC 0805 1NF 50V X7R 10 SAMSUNG C803 065G080510232K F CAP 0805 1000PF 10 50V X7R C815 065G080510232K...

Page 51: ...X7R C609 065G080510522K T CAP 0805 1UF 10 25V X7R C806 065G080522432K 3 CAP CHIP 0805 220N 50V X7R 10 C807 065G080522432K A CAP 0805 220NF 10 50V X7R C806 065G080522432K A CAP 0805 220NF 10 50V X7R C8...

Page 52: ...FR 22 OHM 5 1 4W XIANZHENG R906 061G152M10452T HX RST MOF 100K 5 2WS R906 061G152M10452T SY RST MOFR 100KOHM 5 2WS FUTABA R904 061G152M25152T HX RST MOF 250R 5 2W R904 061G152M25152T SY RST MOF 250R 5...

Page 53: ...095G 90 23 JUMP WIRE J812 095G 90 23 JUMP WIRE J814 095G 90 23 JUMP WIRE J815 095G 90 23 JUMP WIRE J901 095G 90 23 JUMP WIRE J903 095G 90 23 JUMP WIRE J904 095G 90 23 JUMP WIRE J905 095G 90 23 JUMP W...

Page 54: ...2G 1191 GLASS CLOTH 052G 1192 GLASS CLOTH E715 715G4497P010060H1S PWR PCB FR1 CTI 600 SS 122 184 1 6MM E715 715G4497P010060H1H PWR PCB FR1 CTI 600 SS 122 184 1 6MM 2nd source T901 S80GL22T3V3HF TRANSF...

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