AOC 712Si Service Manual

AOC 712Si Service Manual

17” lcd color monitor
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17" LCD Color Monitor
Service
Service
Service
Description
Table Of Contents..........................................................1
Revision List.............................................................2
Important Safety Notice.............................................3
1. Monitor Specification...............................................4
2. LCD Monitor Description........................................5
3. Operation Instruction............................................6
3.1 General Instructions.........................................6
3.2 Control Button......................................................6
3.3 Adjusting the Picture..........................................7
4. Input/Output Specification.......................................8
4.1 Input Signal Connector.........................................8
4.2 Factory Preset Display Modes......................................9
4.3 Power Supply.....................................................10
N
4.4 Panel Specification.................................................10
5. Block Diagram.....................................................12
5.1 Soft Flow Chart....................................................12
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

TABLE OF CONTENTS

Page
Description
5.2 Electrical Block Diagram.....................................14
6. Schematic.............................................................15
6.1 Main Board..........................................................15
6.2 Inverter Board.....................................................25
6.3 Power Board.........................................................26
7. PCB Layout............................................................27
7.1 Main Board............................................................27
7.2 PWPC Board........................................................27
7.3 Key Board.............................................................28
8. Maintainability.......................................................28
8.1 Equipments and Tools Requirement.......................28
8.2 Trouble Shooting...................................................29
10. Monitor Exploded View........................................37
11. BOM List.................................................................38
12.Different Part list..............................................55
SAFETY NOTICE
1
AOC 712Si
Horizontal Frequency
30kHz - 80kHz
Page

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Summary of Contents for AOC 712Si

  • Page 1: Table Of Contents

    17” LCD Color Monitor AOC 712Si Service Service Service Horizontal Frequency 30kHz – 80kHz TABLE OF CONTENTS Description Page Description Page Table Of Contents..……..……......…..1 5.2 Electrical Block Diagram….………………..….….14 Revision List.….....……......……..2 6. Schematic……………...........…15 Important Safety Notice.…………....……..3 6.1 Main Board.……...……..........15 1. Monitor Specification......………..4 6.2 Inverter Board..………..……........25...
  • Page 2: Revision List

    17” LCD Color Monitor AOC 712Si REVISION LIST Revision Date Revision History TPV Model Feb-05-07 Initial Release T76CNNNQHAACNJ Mar-19-07 Add the Different Part List T76CNNNQHAA3FJ T76CNNNQHAA4FJ T76CNNNQHAA5FJ...
  • Page 3: Important Safety Notice

    AOC 712Si Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.
  • Page 4: Monitor Specification

    17” LCD Color Monitor AOC 712Si 1. Monitor Specifications Items Descriptions Driving system TFT Color LCD LCD Panel Size 43.2cm(17.0") Pixel pitch 0.264mm( H ) × 0.264mm( V ) Video R,G,B Analog Interface Input Separate Sync. H/V TTL H-Frequency 30kHz – 80kHz...
  • Page 5: Lcd Monitor Description

    17” LCD Color Monitor AOC 712Si 2. LCD Monitor Description The LCD MONITOR will contain a power board and key board. The panel module will contain panel control logic, brightness control logic, CCFL backlight, signal processing, main control and DDC etc.
  • Page 6: Operation Instruction

    17” LCD Color Monitor AOC 712Si 3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.
  • Page 7: Adjusting The Picture

    17” LCD Color Monitor AOC 712Si 3.3 Adjusting the Picture 1. Press the MENU-button to activate the OSD window. 2. Press < or > to select the desired function. Once the desired function is highlighted, press the MENU-button to <...
  • Page 8: Input/Output Specification

    17” LCD Color Monitor AOC 712Si Auto adjust the H/V Position, Focus and clock of picture Auto Config Do not execute Auto config return to main menu. H. Position Adjust the horizontal position of the OSD. OSD Setup V. Position Adjust the vertical position of the OSD.
  • Page 9: Factory Preset Display Modes

    17” LCD Color Monitor AOC 712Si 4.2 Factory Preset Display Modes VESA MODES Horizontal Vertical Nominal Sync Nominal Sync Nominal Frequency Polarity Freq. Polarity Pixel Mode Resolution Total +/- 0.5kHz +/- 1 Hz Clock (MHz) 640x480@60Hz 800 x 525 31.469 59.940...
  • Page 10: Power Supply

    17” LCD Color Monitor AOC 712Si 4.3 Power Supply The power supply should be integrated to the monitor housing. A/C Line voltage range : 100 V ~ 240 V A/C Line frequency range : 50 ± 3Hz, 60 ± 3Hz Current : 1.5A max at 100V;...
  • Page 11 17” LCD Color Monitor AOC 712Si 4.4.2 Optical Characteristics 4.4.3 Parameter guide line for CCFL Inverter TFT LCD Module: Back Light Unit:...
  • Page 12: Block Diagram

    17” LCD Color Monitor AOC 712Si 5. Block Diagram 5.1 Soft Flow Chart...
  • Page 13 17” LCD Color Monitor AOC 712Si 1) MCU initializes. 2) Is the EPROM blank? 3) Program the EPROM by default values. 4) Get the PWM value of brightness from EPROM. 5) Is the power key pressed? 6) Clear all global flags.
  • Page 14: Electrical Block Diagram

    17” LCD Color Monitor AOC 712Si 5.2 Electrical Block Diagram 5.2.1 Main Board Adapter 5V Backlight DC/DC AIC108 RT9164 Data driver 12MH Gray levels Buffer NEVETEK DC/DC Converter 24C16 24C02 Vcom Backlight Adapter 12V Inverter 5.2.2 Inverter/Power Board Bridge Rectifier...
  • Page 15: Schematic

    17” LCD Color Monitor AOC 712Si 6. Schematic 6.1 Main Board 715G1783-D1-N B_D17 B_D16 B_D15 B_D14 B_D13 B_D12 B_D11 1.8V 3.3V B_D10 B_D9 B_D8 B_D7 B_D6 B_D5 B_D4 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF (NC)3PIN/2.0mm B_D3 B_D2 B_D1 B_D0...
  • Page 16 C153   1/16W 1uF/16V R186   1/16W MUTE NC/10K   1/16W C152 1N4148 1uF/16V MUTE PANEL_VDD AOC Sam request Audio control method AMP_MUTE 0.1uF-->NC NC/4.7K   1/16W 10K-->47K 1/16W NC/PMBS3904   1/16W AO3401   1/16W 4.7K-->100K 1/16W   PWR_EN PMBS3904 0.1uF...
  • Page 17 17” LCD Color Monitor AOC 712Si 0.22uF BAV99 DDC_SCL DDC_SCL 100 1/16W-->0 ohm B_IN+ DDC_SDA DDC_SDA 30 OHM BEAD C146   1/16W UDZS5.6B UDZS5.6B DB_B-   1/16W B_IN- DDC_VDD   1/16W VGA_CONN VGA_DET DB_R- DB_R+ DB_G- 0.22uF DB_G+ UDZS5.6B DB_B-...
  • Page 18 17” LCD Color Monitor AOC 712Si BAT54SW C1608X7R1H104K PMBS3906 0 ohm 0 ohm VDDG (24V +- 1.0V) RN5VD25AA-TR-FA 100k C1608X7R1H104K 100k C1608X7R1H104K XDON XDON 100k 0 ohm VDDD (12V +-0.3V) LY3518-4R7M ASKS10-04T VDDDS MMC2301 PANEL_VDD VDDA 0 ohm 47uF/16V 47uF/16V...
  • Page 19 17” LCD Color Monitor AOC 712Si IC5H VGMA14 R112 AAT7205 1 ohm IC5D VGMA7 TP10 VGMA13 AAT7205 R118 TP11 IC5G VGMA6 TP12 VGMA12 R125 AAT7205 VDDA0 IC5C TP13 TP14 VGMA5 VGMA11 IC5J AAT7205 R128 C100 TP15 VGMA4 IC5F TP16 VGMA10...
  • Page 20 17” LCD Color Monitor AOC 712Si TP24 TP25 TP26 TP27 TP28 TP29 TP30 TP31 TP32 TP33 TP34 TP35 TP36 TP37 TP38 TP39 TP40 TP41 TP22 TP23 R149 R150 R151 R152 R153 R154 R155 R156 R157 R158 100 ohm 1% 100 ohm 1%...
  • Page 21 17” LCD Color Monitor AOC 712Si F_D[0..19] VGMA[1..14] STH2-3 VDDDS VDDA VCOM DUMMY DUMMY DUMMY DUMMY VCOM VCOM VCOM VCOM VCOM VCOM XDON XDON VCOM VCOM VCOM VCOM VCOM VCOM STH2-3 STH3-4 DIO1 DIO1 F_D0 F_D0 D00N D00N F_D1 F_D1...
  • Page 22 17” LCD Color Monitor AOC 712Si B_D[0..19] TP50 STH_B F_D[0..19] VGMA[1..14] STH_B STH4-5 VDDDS VDDA VCOM DUMMY DUMMY DUMMY DUMMY VCOM VCOM VCOM VCOM VCOM VCOM XDON XDON VCOM VCOM VCOM VCOM VCOM VCOM STH4-5 STH_B DIO1 DIO1 F_D0 B_D0...
  • Page 23 17” LCD Color Monitor AOC 712Si B_D[0..19] VGMA[1..14] STH6-7 VDDDS VDDA VCOM DUMMY DUMMY DUMMY DUMMY VCOM VCOM VCOM VCOM VCOM VCOM XDON XDON VCOM VCOM VCOM VCOM VCOM VCOM STH6-7 STH7-8 DIO1 DIO1 B_D0 B_D0 D00N D00N B_D1 B_D1...
  • Page 24 17” LCD Color Monitor AOC 712Si TP51 TP52 TP53 TP54 TP55 TP56 TP57 TP58 TP59 TP60 TP61 TP62 TP63 TP64 TP65 TP66 TP67 TP68 TP69 TP70 R163 R164 R165 R166 R167 R168 R169 R170 R171 R172 100 ohm 1% 100 ohm 1%...
  • Page 25: Inverter Board

    17” LCD Color Monitor AOC 712Si 6.2 Inverter Board CN801 F801 +12V Q802 4A/32V R802 AM4502C 5pF/3KV R804 1.5K 1/10W C801   1/10W Q801 1/10W     R803 PMBS3904 R801 CONN3.5mm R806   1/10W   1/10W PT801 DTA144WKA VCC_I 100K  ...
  • Page 26: Power Board

    17” LCD Color Monitor AOC 712Si 6.3 Power Board C914 0.001uF/500V T901 R901   1/2W L905 3.5UH BD901 +12V C907 2KBP06M C902 R924 100uF/400V 0.0015uF/2KV 100K   C904 C907 D901 1000uF/16V C924 C906 SP10150 C905 470uF/16V D902 1000uF/16V R903 FR107 7.5K...
  • Page 27: Pcb Layout

    17” LCD Color Monitor AOC 712Si 7. PCB Layout 7.1 Main Board 715G1783-D1-N 7.2 PWPC Board 715G1696-2-2 715G1696-2-2...
  • Page 28: Key Board

    17” LCD Color Monitor AOC 712Si 7.3 Key Board 715G2127-1-2 8. Maintainability 8.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual.
  • Page 29: Trouble Shooting

    17” LCD Color Monitor AOC 712Si 8.2 Trouble Shooting 8.2.1 Main Board No Power (No LED indicator) Rewrite SW Check U3, U4=5v Check adapter and connector Change defective component Check U2 supply voltage Check U2、U3 and U4 if OK Check key circuit if ok Change defective component Check U2 (pin PWR、RST )and...
  • Page 30 17” LCD Color Monitor AOC 712Si No picture(LED orange) Change U2 The button under control Check reset signal of U2、pin17 Change defective Check waveforms of U2、pin50 and pin51 Check Y1、C29 supply voltage component Check U2 supply voltage Change defective component Check if under saving mode Check VGA、HS、VS signal...
  • Page 31 17” LCD Color Monitor AOC 712Si White screen Change U2 Check PWR_EN is high voltage Check L1 supply voltage Change Q3、L1 Change C81 Check C81 Pin 6 oscillate is normal Check output of Pin4 from IC3 Check pin1、pin2 is high voltage...
  • Page 32 17” LCD Color Monitor AOC 712Si Miss color Check the missing color, the input Check signal connector if OK Check signal source signal of which is normal Change signal connector connecter Check U2、pin77、pin82、pin84, check U2 R、G、B if OK B fail...
  • Page 33 17” LCD Color Monitor AOC 712Si 8.2.2 Power/Inverter Board 1) No power Check F801= 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C907 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin8 of IC901...
  • Page 34 17” LCD Color Monitor AOC 712Si 2.) No Backlight Check F801=12V Check adapter and F801 Check ON/OFF signal Check Interface board or main board Check IC801 PIN2=5V Change on/off circuit Check IC201 PIN13 have triangle wave Change U201 Check IC201 PIN1/PIN15 PWM wave...
  • Page 35 17” LCD Color Monitor AOC 712Si 8.2.2 Keypad Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board normally?
  • Page 36: White-Balance, Luminance Adjustment

    6500K color temp. parameter is x = 313±30, y = 329±30, Y ≥180 cd/m 3. Into factory mode of AOC 712Si Turn on power, press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel.
  • Page 37: Monitor Exploded View

    17” LCD Color Monitor AOC 712Si 10. Monitor Exploded View...
  • Page 38: Bom List

    17” LCD Color Monitor AOC 712Si 11. BOM List T76CNNNQHAACNJ Location Part No. Description KEPC6JB2 KEY BOARD PWPC1741CPE1P POWER BOARD 11G6054 1 PIN CONNECTOR 12G 394 3 FOOT 15G8266 1 AC BKT 26G 800504 6 BARCODE 40G 58162435A MANUAL P/N LABEL...
  • Page 39 17” LCD Color Monitor AOC 712Si A34G0096 GMZAB REAR COVER A34G0097 GM 1B BASE A37G0007 9 HINGE J15G0013 1 SG VESA PLATE J15G8B07 1 HINGE BKT J33G8B06 Q1 L KEY PAD J33G8B07 1 POWER LENS J40G 17T61510A ID 712si J41G170161518A...
  • Page 40 17” LCD Color Monitor AOC 712Si C801 65G 3J5096ET 5PF 5% SL 3KV C811 65G 3J5096ET 5PF 5% SL 3KV C900 65G305M1022BP Y2 1000PF M 250VAC Y5P C901 65G305M1022BP Y2 1000PF M 250VAC Y5P C902 65G306M4722BP 4700PF+-20% 400VAC C904 67G215S1023KV EC 105℃...
  • Page 41 17” LCD Color Monitor AOC 712Si R909 61G0805100 1F RST CHIP 1K 1/8W 1% R804 61G0805102 CHIPR 1K OHM +-5% 1/10W R918 61G0805102 CHIPR 1K OHM +-5% 1/10W R919 61G0805102 CHIPR 1K OHM +-5% 1/10W R832 61G0805103 CHIP 10KOHM 1/10W...
  • Page 42 17” LCD Color Monitor AOC 712Si F801 61G1206000 4 CHIP 0OHM 4A R914 61G1206204 RST CHIPR 200 KOHM +-5% R904 61G1206229 RST CHIP 2R2 1/4W 5% R825 61G1206564 RST CHIPR 560 KOHM +-5% R900 61G1206684 CHIPR 680KOHM +-5% 1/8W R901...
  • Page 43 17” LCD Color Monitor AOC 712Si L901 6G 31502 1.5MM RIVET L902 6G 31502 1.5MM RIVET NR901 6G 31502 1.5MM RIVET PT801 6G 31502 1.5MM RIVET Q901 6G 31502 1.5MM RIVET T901 6G 31502 1.5MM RIVET 715G1696 2 2 J301...
  • Page 44 17” LCD Color Monitor AOC 712Si J906 95G 90 23 TINCOATEDCOPPER J907 95G 90 23 TINCOATEDCOPPER J908 95G 90 23 TINCOATEDCOPPER R833 95G 90 23 TINCOATEDCOPPER R834 95G 90 23 TINCOATEDCOPPER R908 61G 17218252T 1.8KOHM 5% 1/4W R806 61G 17247152T...
  • Page 45 17” LCD Color Monitor AOC 712Si 56G 663 2 AAT7205 SSOP-24 56G1133 24 AT24C16AN-10SU-2.7 56G1133 34 M24C02-WMN6TP 56G1133 56 M24C16-WMN6TP 56G113334A 24LC02B/SNG SOIC-8PIN 56G113356A 24LC16B/SNG SOIC-8PIN 56G4LCX 14 PH IC 74LVC14APW PHILIPS 56G4LVC 14 TI IC SN74LVC14APWR TSSOP-14 TI 57G 417 4...
  • Page 46 17” LCD Color Monitor AOC 712Si R166 61G0603100 0F RST CHIPR 100 OHM +-1% 1/10W R167 61G0603100 0F RST CHIPR 100 OHM +-1% 1/10W R168 61G0603100 0F RST CHIPR 100 OHM +-1% 1/10W R169 61G0603100 0F RST CHIPR 100 OHM +-1% 1/10W...
  • Page 47 17” LCD Color Monitor AOC 712Si 61G0603102 RST CHIP 1K 1/10W 5% 61G0603102 RST CHIP 1K 1/10W 5% 61G0603102 RST CHIP 1K 1/10W 5% 61G0603103 RST CHIPR 10 KOHM +-5% 1/10W 61G0603103 RST CHIPR 10 KOHM +-5% 1/10W R188 61G0603103...
  • Page 48 17” LCD Color Monitor AOC 712Si 61G0603220 RST CHIPR 22 OHM +-5% 1/10W 61G0603220 RST CHIPR 22 OHM +-5% 1/10W 61G0603220 RST CHIPR 22 OHM +-5% 1/10W 61G0603220 RST CHIPR 22 OHM +-5% 1/10W 61G0603220 RST CHIPR 22 OHM +-5% 1/10W...
  • Page 49 17” LCD Color Monitor AOC 712Si R173 61G0603472 RST CHIPR 4.7KOHM +-5% 1/10W 61G0603472 RST CHIPR 4.7KOHM +-5% 1/10W 61G0603472 RST CHIPR 4.7KOHM +-5% 1/10W 61G0603472 RST CHIPR 4.7KOHM +-5% 1/10W 61G0603473 RST CHIPR 47 KOHM +-5% 1/10W R101 61G0603474...
  • Page 50 17” LCD Color Monitor AOC 712Si 65G060310412T MLCC 0603 CAP 100NF K 16V X7R 65G060310412T MLCC 0603 CAP 100NF K 16V X7R 65G060310412T MLCC 0603 CAP 100NF K 16V X7R 65G060310412T MLCC 0603 CAP 100NF K 16V X7R 65G060310412T MLCC 0603 CAP 100NF K 16V X7R...
  • Page 51 17” LCD Color Monitor AOC 712Si C114 65G060310412T MLCC 0603 CAP 100NF K 16V X7R C113 65G060310412T MLCC 0603 CAP 100NF K 16V X7R C112 65G060310412T MLCC 0603 CAP 100NF K 16V X7R C109 65G060310412T MLCC 0603 CAP 100NF K 16V X7R...
  • Page 52 17” LCD Color Monitor AOC 712Si 65G060310412Y MLCC 0603 CAP 100NF K 16V X7R 65G060310412Y MLCC 0603 CAP 100NF K 16V X7R 65G060310412Y MLCC 0603 CAP 100NF K 16V X7R C115 65G060310412Y MLCC 0603 CAP 100NF K 16V X7R C114...
  • Page 53 17” LCD Color Monitor AOC 712Si 65G060310412Y MLCC 0603 CAP 100NF K 16V X7R 65G060310412Y MLCC 0603 CAP 100NF K 16V X7R 65G060310412Y MLCC 0603 CAP 100NF K 16V X7R 65G060310412Y MLCC 0603 CAP 100NF K 16V X7R C140 65G060310412Y...
  • Page 54 17” LCD Color Monitor AOC 712Si 65G080522417T MLCC 0805 0.22UF Z 16V Y5V 65G080522417T MLCC 0805 0.22UF Z 16V Y5V 65G080522417T MLCC 0805 0.22UF Z 16V Y5V 65G080522417Y MLCC 0805 0.22UF Z 16V Y5V 65G080522417Y MLCC 0805 0.22UF Z 16V Y5V 65G080522417Y MLCC 0805 0.22UF Z 16V Y5V...
  • Page 55: Different Part List

    17” LCD Color Monitor AOC 712Si 93G 64 42 P BAV70 SOT-23 93G 6433P BAV99 93G 6433P BAV99 93G 6433P BAV99 93G 6433S DIODE BAV99 SEMTECH 93G 6433S DIODE BAV99 SEMTECH 93G 6433S DIODE BAV99 SEMTECH 93G 22S 51 12MHZ/20PF/AGX-49U/S SMD...
  • Page 56 17” LCD Color Monitor AOC 712Si Diversity of T76CNNNQHAA3FJ compared with T76CNNNQHAANCJ Location Part No. Description 89G408A15N LS POWER CORD...

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