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AOC E2251FWH, Service Manual

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AOC E2251FWH Service Manual Download Page 34

 

34                                                                                                                  

8.2 Trouble Shooting 

1. No 

Power 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

OK 

No power

 

Check power cable is 

tightened? 

Check Power “On/Off” 

is “On”? 

Re-plug the power cable 

Replace key board and check connections 

Check the LED 
indicate is OK? 

Check the AC power   

Replace main board and check connections 

OK 

NG

OK 

NG

Turn on the Power “On/Off” switch 

Summary of Contents for E2251FWH

Page 1: ... 3 1 Monitor Specification 4 2 LCD Monitor Description 5 3 Operation Instruction 6 3 1 General Instructions 6 3 2 Hot Keys 6 3 3 OSD Setting 7 4 Input Output Specification 19 4 1 Input Signal Connector 19 4 2 Factory Preset Display Modes 20 4 3 Panel Specification 21 CAUTION USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING 5 Block Diagram 24 6 Schematic 25 6 1 Main Board 25 6 2 Key...

Page 2: ...2 Revision List Version Release Date Revision History L T Model Name A00 JUL 20 2012 Add new CKD model HIAJNZ2QB7A1CNF LF HIAJNZ2QB7A1CNF PA ...

Page 3: ...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 implied arising out of any unauthorized modification of design Servicer assumes all liability FOR PRODUCTS CONTAINING LASER DANGER Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM CAUTION Use of cont...

Page 4: ...4 1 Monitor Specifications ...

Page 5: ...in a main board and a key board which house the flat panel control logic brightness control logic and DDC Monitor Block Diagram Flat Panel and LED backlight Main Board Key Board DVI Signal Adapter D SUB Signal AC IN 100V 24 LED Drive HDMI Signal Audio out ...

Page 6: ...ide image ratio Volume When there is no OSD and VGA input only press hotkey continuously to change 4 3 or wide image ratio If the product screen size is 4 3 or input signal resolution is wide format the hot key is disable to adjust and also only available for VGA input when HDMI input press hotkey continuously to activate Volume and press the Up or Down to change the setting press Menu button for ...

Page 7: ...her function repeat steps 2 3 4 OSD Lock Function To lock the OSD press and hold the MENU button while the monitor is off and then press power 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 Notes 1 If the product has only one signal input the item of Input Select is disable to adjust 2 If t...

Page 8: ...8 Luminance 1 Press Menu to display menu 2 Press or to select Luminance and press to enter 3 Press or to select submenu and press to enter ...

Page 9: ...9 4 Press or to adjust 5 Press to exit ...

Page 10: ...10 Image Setup 1 Press Menu to display menu 2 Press or to select Image Setup and press to enter 3 Press or to select submenu and press to enter 4 Press or to adjust ...

Page 11: ...Picture Phase to reduce Horizontal Line noise Sharpness 0 100 Adjust picture sharpness H Position 0 100 Adjust the horizontal position of the picture V Position 0 100 Adjust the vertical position of the picture Color Setup 1 Press Menu to display menu 2 Press or to select Color Setup and press to enter ...

Page 12: ...12 3 Press or to select submenu and press to enter 4 Press or to adjust 5 Press to exit ...

Page 13: ... register Blue Blue Gain from Digital register DCB Mode Full Enhance on or off Disable 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 AutoDetect on or off Disable or Enable AutoDetect Mode DCB Demo on or off Disable or Enable Demo Picture Boost 1 Press M...

Page 14: ...ress to exit Frame Size 14 100 Adjust Frame Size Brightness 0 100 Adjust Frame Brightness Contras 0 100 Adjust Frame Contrast H position 0 100 Adjust Frame horizontal Position V position 0 100 Adjust Frame vertical Position Bright Frame on or off Disable or Enable Bright Frame ...

Page 15: ...15 OSD Setup 1 Press Menu to display menu 2 Press or to select OSD Setup and press to enter 3 Press or to select submenu and press to enter ...

Page 16: ... 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 Transparence 0 100 Adjust the transparence of OSD Language Select the OSD language Extra 1 Press Menu to display menu ...

Page 17: ...17 2 Press or to select Extra and press to enter 3 Press or to select submenu and press to enter 4 Press or to adjust 5 Press to exit ...

Page 18: ...18 Exit 1 Press Menu to display menu 2 Press or to select Exit and press to exit Exit Exit the main OSD ...

Page 19: ...ync 7 GND G 15 DDC Serial clock 8 GND B Pin Number 24 Pin Color Display Signal Cable Pin Number 24 Pin Color Display Signal Cable 1 TMDS data 2 13 TMDS data 3 2 TMDS data 2 14 5V Power 3 TMDS data 2 4 Shield 15 Ground 对于 5V 4 TMDS data 4 16 Hot Plug Detect 5 TMDS data 4 17 TMDS data 0 6 DDC Clock 18 TMDS data 0 7 DDC data 19 TMDS data 0 5 Shield 8 N C 20 TMDS data 5 9 TMDS data 1 21 TMDS data 5 10...

Page 20: ...20 4 2 Factory Preset Display Modes ...

Page 21: ...es Gray scale or the brightness of the sub pixel color is determined with a 8 bit gray scale signal for each dot thus presenting a palette of more than 16 7M colors with Advanced FRC Frame Rate Control It has been designed to apply the interface method that enables low power high speed low EMI FPD Link or compatible must be used as a LVDS Low Voltage Differential Signaling chip It is intended to s...

Page 22: ...OSAIC 60Hz 1000 1300 mA 1 5 ILCD BLACK 60Hz 1300 1690 mA 2 5 ILCD BLACK 75Hz 2000 mA 5 Power Consumption PLCD 5 00 6 5 Watt 1 Inrush current IRUSH 3 0 A 1 4 LED bar Electrical characteristics Parameter Symbol Condition Values Unit Notes Min Typ Max LED 1 7 LED String Current Is 110 120 mA 2 7 LED String Voltage Vs 48 0 51 2 54 4 V 3 7 Power Consumption PBar 11 3 12 0 Watt 4 6 7 LED Life Time LED_L...

Page 23: ...4 ms Color Coordinates CIE1931 RED Rx Typ 0 03 0 642 Typ 0 03 PR 650 Ry 0 332 GREEN Gx 0 305 Gy 0 625 BLUE Bx 0 150 By 0 068 WHITE Wx 0 313 Wy 0 329 Viewing Angle CR 5 5 PR 880 x axis right 0 r 75 88 Degree x axis left 180 l 75 88 y axis up 90 u 70 85 y axis down 270 d 70 85 Viewing Angle CR 10 x axis right 0 r 70 85 Degree x axis left 180 l 70 85 y axis up 90 u 60 75 y axis down 270 d 70 85 Cross...

Page 24: ...801 12V LED CN803 MOSFET Q806 CRYSTAL 14 318MHZ X401 Flash Memory MX25L2026DM1I 1 2G U402 Scalar IC NT68677UMFG E Include ADC OSD MCU U401 Panel Interface CN406 Key Control Interface CN405 D Sub Connector CN101 DVI Connector CN102 HDMI Connector CN501 PHONE JACK CN603 Audio decoder APA2176A U601 ...

Page 25: ...C 8 CN101 D SUB 15P 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 17 16 RX1 5 RXC 5 RX0 5 RX2 5 RX2 5 RX0 5 RXC 5 RX1 5 C111 22pF 50V CMVCC1 C113 NC 22P 50V C114 NC 22P 50V DCLK CN102 JACK DAT2 1 DAT2 2 2 4shield 3 DAT4 4 DAT4 5 DDC SCL 6 DDC SDA 7 VSYNC 8 DAT1 9 DAT1 10 1 3shield 11 DAT3 12 DAT3 13 5V 14 SYNC GND 15 HPD 16 DAT0 17 DAT0 18 0 5shield 19 DAT5 20 DAT5 21 clk shield 22 clk 23 clk 24 GND 26 GND ...

Page 26: ... HDMI1 D2 C506 100N 16V HDMI1_DET R535 47R 1 16W 5 HDMI1 D2 R526 0R05 1 16W DDC_WP 2 5 HDMI1_ 5V HDMI1 D0 HDMI1 D0 HDMI1_DET CMVCC1 2 4 5 6 7 ZD503 RLZ5 6B HDMI1_SDA 5 HDMI1_SCL 5 HDMI1 D1 ZD502 NC RLZ5 6B C505 100N 16V HDMI1_HPD 5 U506 TVU1240R1A IN1 1 IN2 2 GND 3 IN3 4 IN4 5 NC 6 NC 7 GND 8 NC 9 NC 10 HDMI1 D1 HDMI1_ 5V 5 R533 10R 1 16W 5 CEC_CTRL 5 HDMI1_D2 5 HDMI1_D1 5 HDMI1_CK 5 HDMI1_D1 5 HD...

Page 27: ... LVB1M PB7 RXEC RXE2 R303 4K7 1 16W 5 C141 100UF 16V RXO1 LVB1P RXO0 LVB0P LVBCKP PB2 RXE2 LVA2P RXO1 RXOC PA3 LVACKM C143 NC RXE0 PA8 LVA0P PA2 LVACKP LVB3P PB0 RXO0 RXEC RXE3 LVA3P RXE1 LVA1M R146 300 OHM 1 4W R147 300 OHM 1 4W RXO2 LVB0M PB9 LVB2P PB4 RXE3 LVA3M PA0 LVA3P RXE3 RXEC LVACKP CN406 CONN 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 RXO0 LVBCKM RXO...

Page 28: ... HDMI1_D1 3 R416 100K 1 16W 5 R440 NC C424 220N16V CN403 NC CONN 1 2 3 4 5 6 7 DVDD PB7 VCC3 3 LED_G DET_DVII VCC1 8 DET_HDMI1 3 DDC_WP 2 3 KEY1 C409 100N 16V R467 NC 3K9 5 1 16W KEY2 PA9 R412 NC 100K 1 16W 5 DET_DVII 2 PA4 C423 100N 16V C411 100N 16V HSYNC 2 GNDG 2 PB1 PB5 VCC3 3 MVDD DVDD BIN 2 R445 2K2 1 16W 5 VCC3 3 GNDB 2 DVI_SCL 2 C418 100N 16V R450 NC 0R05 1 16W LED_GRN BLUE R451 4K7 1 16W ...

Page 29: ...C1 D707 SR34 1 2 D708 SR34 1 2 CMVCC1 C717 100N 16V 12V U702 G1117 33T43UF ADJ GND 1 VOUT TAB 2 VIN 3 BKLT EN FB701 BEAD 1 2 R702 10K 1 16W 5 R703 10K 1 16W 5 C708 100N 16V C702 100N 16V R704 22K 1 16W 5 C709 100N 16V R706 100R 1 16W 5 C705 100N 16V VCC1 8 CMVCC1 U703 NC AZ1117D 1 8 E1 OUT 2 IN 3 GND 1 Pad 璶 TOP and Button常璶Τ 11 30 2009 Place a large Pad with TOP Pad 璶 TOP and Button 常璶Τ U704 VI 3...

Page 30: ... R607 5 1KOHM 5 1 10W R610 5 1KOHM 5 1 10W R613 1K 1 10W 5 R612 1K 1 10W 5 Mute_Audio C605 1uF 16V C606 1uF 16V C608 10uF 10V R608 100R 1 16W 5 CN603 PHONEJACK 1 2 3 5 4 L C604 1N 50V ZD601 NC RLZ5 6B ZD602 NC RLZ5 6B R FB602 60 OHM 1 2 FB603 60 OHM 1 2 C603 1N 50V Mute_Audio APA2176A U601 NC 13 PVDD 16 NC 4 CP 1 PGND 2 CP 3 CVSS 5 VSS 6 LOUT 7 VDD 8 ROUT 9 LIN 10 RSD 11 RIN 12 GND 14 LSD 15 L R60...

Page 31: ... 4K7 1 16W 5 R004 100R 1 16W 5 C004 12P 50V C008 100P 50V C007 100nF 25V CIN_01 Dif f erential KEY0 1524 CIN_05 C005 100nF 25V Differential C006 100nF 25V GPIO_00 SM_CLK U001 IT7230EFN BX CIN03 1 CIN07 2 CIN09 3 CIN11 4 VSHILD 5 VBIAS 6 AVSS 7 AVCC 8 DVCC 9 SCLK 10 SDA 11 INT 12 GPIO0 13 GPIO1 14 CIN00 15 CIN01 16 E PAD 17 CIN_09 Auto CIN_03 SM_INT SM_DATA CIN_05 GPIO_01 Power V3 3 V3 3 Menu AC_SH...

Page 32: ...R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R143 R146 R147 R303 R304 R305 R306 R307 R401 R402 R403 R404 R405 R406 R407 R409 R410 R411 R412 R413 R414 R415 R416 R417 R418 R419 R420 R421 R422 R423 R424 R425 R440 R441 R443 R444 R445 R446 R448 R450 R451 R452 R453 R455 R460 R461 R462 R463 R465 R466 R467 R518 R519 R520 R521 R522 R523 R524 R526 R527 R528 R529 R530 R531 R532 R533 R534 R535 R605 R607 ...

Page 33: ...intainability 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 Service Manual 8 User Manual ...

Page 34: ...eck power cable is tightened Check Power On Off is On Re plug the power cable Replace key board and check connections Check the LED indicate is OK Check the AC power Replace main board and check connections OK NG OK NG Turn on the Power On Off switch ...

Page 35: ... No Video Power LED White Press the power button is OK Check the LVDS FFC cable or panel The end NG OK Replace the main board Replace the LVDS FFC cable or panel Replace the key board NG Replace the main board and connection OK OK ...

Page 36: ...ry 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 phase and pixel clock in the user mode Replace the main board Replace the panel NG NG NG OK NG NG OK The end OK NG ...

Page 37: ...r 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 set the color settings until customer satisfy Replace the main board NG OK NG OK NG ...

Page 38: ... 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 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 reachedthe value G 100 6 Adjust the BLUE on facto...

Page 39: ...bove 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 MEM channel to Channel 10 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 A...

Page 40: ...40 10 Monitor Exploded View ...

Page 41: ...iption 10 Stand plate 16 0D1G1030 8120 SCREW MAIN BOARD MAIN FRAME 11 RUBBER FOOT 17 0Q1G 140 10120 SCREW REAR COVER HINGE 12 MYLAR 18 0M1G3130 5 47 CR3 SCREW REAR COVER MAIN FRAME 13 KEY BOARD 19 0M1G1730 8225 CR3 SCREW STAND HINGE 14 PANEL 20 0Q1G1030 6120 SCREW STAND PLATE BASE 15 MAIN BOARD 21 F01G6064 4 SCREW STAND PLATE HINGE ...

Page 42: ...E TAPE Y1200141 052G 1211 B Conductive Tape 85mm 40mm 0 09mm 单 导 052G 2191 A PAPER TAPE 052G6019 1 INSULATING TAPE 0D1G1030 8120 screw 0M1G3130 5 47 CR3 SCREW M3 x5 0Q1G 140 10120 SCREW 705GFB41011 MANUAL ASS Y 040G 58162435A P N LABEL FOR MANUAL PE BAG F70G22C1615 9B E2251FWH CD MANUAL Q36G 600517 duster cloth Q41G780A61566A WARRANTY CARD Q44G600024D 3A carton Q45G2010M0201A pe bag for manual 705...

Page 43: ...AOC E2251FWH EDID D SMTCA U102 100GANJIV00Z1E AOC E2251FWH EDID A A15G1636301CKD MAIN_FRAME A34G2580AED 2B01C 0 rear cover ADPCA1236YA2 ADAPTER BOARD CBPCANZA1A3C CONVERSION BOARD FOR CKD CN406 033G801930F CH JS WAFER 30P 1 0MM JINGSHI 033G801930F CH L WAFER 30P 1 0MM XIANGLONG 2nd source C718 067G204V181 3K CS CAP 180uF 16V 8 8 mm F67G204V181 3L NO SUGGEST EC 180uF 20 16V 105 2000H 8 8 2nd source...

Page 44: ...source CN102 F88G354GOF1VXH C KD DVI CONN NOT WITH SCREW 24P WHITE XIANHE F88G 35424F C CKD DVI CONN NOT WITH SCREW 24P WHITE CL 2nd source 088G 35424F XH CK D DVI CONN NOT WITH SCREW 24P WHITE XIANHE 2nd source H40G 45762429A CBCP Label for EE SMTCANZA1A3C MAIN BOARD FOR SMT CKD U401 056G 562392 IC SCALER NT68677UMFG E QFP 128 Novatek U704 056G 563113 IC LDO G1117 18T63Uf 1A 1 8V SOT 223 GMT U702...

Page 45: ...0V SOT 23 BLUE ROCKET 2nd source Q806 057G 763 92 MOSFET P8008HV 4A 80V SOP 8 NIKO SEM 057G 763947 MOSFET APM8005KCTRG 5 2A 80V SOP 8 ANPEC 2nd source Q301 057G 763535 MOSFET LP3401LT1G 4 2A 30V SOT 23 LRC 057G 763940 MOSFET AO3401A 4 2A 30V SOT 23 AOS 2nd source R425 R444 R448 R45 2 R453 R518 R519 R5 20 R521 R522 R523 R 524 R526 061G0402000 JT RST CHIPR MAX0R05 1 16W TZAI YUAN R102 R103 R104 R13 ...

Page 46: ... YUAN R401 061G04024700FI RST CHIPR 470 OHM 1 1 16W 0402 TA I R116 R117 R132 R13 3 R303 R405 R406 R4 51 R530 R531 R705 061G0402472 JT RST CHIPR 4 7 KOHM 5 1 16W 0402 TZAI YUAN R101 R105 R106 061G0402750 JT RST CHIPR 75 OHM 5 1 16W 0402 TZAI YUAN R111 R455 061G0603000 JT RST CHIP MAX 0R05 1 10W TZAI YUAN R714 061G06031002FF RST CHIPR 10 KOHM 1 1 10W 0603 FENGHUA R612 R613 R806 R80 8 061G0603102 JT ...

Page 47: ...RST 1206 0 12R 1 1 4W TZAI YUAN 2nd source R146 R147 061G1206301 JT RST CHIPR 300 OHM 1 4W TZAI YUAN R843 061G1206681 JT RST CHIPR 680 OHM 5 1 4W C603 C604 065G040210232K Y MLCC 0402 1000pF 10 50V X7R YAGEO C110 C116 C142 C30 4 C401 C403 C404 C4 06 C407 C408 C409 C 410 C411 C413 C415 C418 C421 C422 C42 3 C426 C437 C438 C5 05 C506 C609 C702 C 705 C706 C708 C709 C717 C721 065G040210412K A MLCC 0402 ...

Page 48: ...15K T MLCC 0603 2 2uF 10 16V X5R TAIYO YUDEN C801 065G060347412K A MLCC 0603 0 47uF 10 16V X7R SAMSUNG 065G060347412K T MLCC 0603 0 47uF 10 16V X7R TAIYO YUDEN 2nd source C802 065G060368332K Y MLCC 0603 68nF 10 50V X7R YAGEO C402 C405 C412 C41 4 C416 C419 C420 C4 25 C436 C608 065G0805106A5K A MLCC 0805 10uF 10 10V X5R SAMSUNG 065G0805106A5K T MLCC 0805 10uF 10 10V X5R TAIYO YUDEN 2nd source C813 C...

Page 49: ... HDMI HEADER 19P VAST 2nd source D502 093G 60518SEM DIODE SCHOTTKY BAT54C HAF 0 2A 30V SOT 23 SEMTECH 093G 60515 L DIDOE SCHOTTKY LBAT54CLT1G 0 2A 30V SOT 23 LRC 2nd source D102 D103 093G 64 42 L DIODE LBAV70LT1G 0 15A 75V SOT 23 LRC 093G 64 42 P DIODE BAV70 0 5A 100V SOT23 PANJIT 2nd source ZD703 093G 39GA52 T DIDOE ZD ZM PTZ9 1BST 9 1V 1W LL 41 SEMTECH D402 D403 D405 ZD1 01 ZD503 093G 39S940 T D...

Page 50: ...LAND F89G 725CAA DB SINGAL CABLE 1500MM COMLINK 2nd source F89G 725HAA DB SINGAL CABLE 1500MM HONGLIN 2nd source E08901 F89G424A15N CX POWER CORD 1500mm Brazil XUEXIANG F89G424A15N IS POWER CORD 1500mm Brazil I SHENG 2nd source F09502 F95G176J 10111 FFC CABLE 10P 360MM P0 5MM KOTL F95G176X 10111 FFC CABLE 10P 360MM P0 5MM WENXIN 2nd source F09503 F95G179X30N102 FFC CABLE 30P 241MM P1 0MM WENXIN F9...

Page 51: ...PO YAGEO 065G040212031J A MLCC 0402 12pF 5 50V NPO SAMSUNG 2nd source D001 081G15BY 2 GP CHIP LED blue Orange GPTD12048BOC1 A GUANGPU 081G15BY 2 EL LED Blue Orange 12 22 BHS2C C30 2C EVERHIGHT 2nd source ZD001 ZD002 093G 39S501 T DIODE ZD LUDZS5 6BT1G 5 6V 0 5W SOD 323 LRC 093G 39S 34 T NO SUGGEST Diode ZD UDZSNP5 6B ROHM 2nd source 709G4842 QS001 COMSUPTIVE ASS Y 052G 2191 A PAPER TAPE 055G 23520...

Page 52: ...CKD Q44G6000 4E CKD Carton Q44G6000CKD26A CKD CARTON Q45G 88607 56 CKD PE BAG Q45G 88607 57 CKD PE BAG 61cm 35cm Q45G2010M0202A PE BAG Q45G9901609243 N PE PAG Q52G 1185 99 big carton tape for aoc Q52G1001MNT009AF ZA INSULATING SHEET ...

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