AOC 196V Service Manual
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AOC 196V Service Manual

19” lcd monitor
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AOC 196V
SERVICE MANUAL
19" LCD Monitor
196V
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT
HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE
ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR
CHANGES, ERRORS OR OMISSIONS.
1

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  • Page 1 AOC 196V SERVICE MANUAL 19” LCD Monitor 196V THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR...

  • Page 2: Table Of Contents

    AOC 196V Table of Content Revision List…………………………………………………………………………………………………………. 1. Monitor Specifications………………………………………………………………………………………….. 2. LCD Monitor Description……………………………………………………………………………………….. 3. Operating Instructions………………………………………………………………………………………….. 3.1 General Instructions…………………………………………………………………………………………... 3.2 Control Buttons………………………………………………………………………………………………... 3.3 Adjusting the Picture………………………………………………………………………………………….. 4. Input/Output Specification……………………………………………………………………………………... 4.1 Input Signal Connector……………………………………………………………………………………….. 4.2 Factory Preset Display Modes……………………………………………………………………………….. 4.3 Power Supply Requirements…………………………………………………………………………………...

  • Page 3: Revision List

    AOC 196V Revision List Revision Date TPV Name Change Description Nov-08-05 T980KH2HD4A1A Original Revision...

  • Page 4: Monitor Specifications

    AOC 196V 1.MONITOR SPECIFICATIONS Driving system TFT Color LCD Size 48.0cm(19.0") LCD Panel Pixel pitch 0.294mm( H )x 0.294mm( V ) Viewable angle 140˚ (H) 130˚ (V) (CR>10) Response time (type) 8 ms for HSD panel Sync. Type H/V TTL...

  • Page 5: Lcd Monitor Description

    AOC 196V 2. LCD MONITOR DESCRIPTION The LCD MONITOR will contain a main board, a power board, a keypad board and an audio board which house the flat panel control 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.

  • Page 6: Operating Instructions

    AOC 196V 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

    AOC 196V 3.3 ADJUSTING THE PICTURE Adjustment steps: 1. Press the MENU-button to activate the OSD window. 2. Press < or > to select the desired function. 3. Press the MENU-button to select the function that you want to adjust.
  • Page 8 AOC 196V User / Blue Blue Gain from Digital-register. Auto Adjust the H/V Position, Focus Auto Config and Clock of picture. (Analog-Only Do not execute Auto Config, return Model) to main menu. Adjust the horizontal position of the H. Position OSD.

  • Page 9: Input/Output Specification

    AOC 196V 4. Input/Output Specification 4.1 Input Signal Connector 1 D-SUB connector PIN NO. DESCRIPTION PI N NO. DESCRIPTION Red Video No Pin! Green Video Logic Ground Blue Video Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync Red Ground V-Sync...

  • Page 10: Factory Preset Display Modes

    AOC 196V 4.2 Factory Preset Display Modes： VESA MODES Horizontal Vertical Nominal Nominal Nominal Sync Sync Pixel Mode Resolution Total Frequency Freq. Polarity Polarity Clock +/- 0.5kHz +/- 1 Hz (MHz) 640x480@60Hz 800 x 525 31.469 59.940 25.175 640x480@72Hz 832 x 520 37.861...

  • Page 11: Power Supply Requirements

    AOC 196V 4.3 Power Supply Requirements A/C Line voltage range 100 V ~ 240 V 50 ± 3Hz, 60 ± 3Hz A/C Line frequency range Current 1.5A max at 100V; 0.8A max at 240 V Peak surge current < 55A peak at 240 VAC and cold starting Leakage current <...

  • Page 12: Optical Characteristics

    AOC 196V 4.4.3 Optical Characteristics...

  • Page 13: Parameter Guide Line For Ccfl Inverter

    AOC 196V 4.4.4 Parameter guide line for CCFL Inverter 1.TFT LCD Module:   2.Back Light Unit:...

  • Page 14: Block Diagram

    AOC 196V 5. Block Diagram 5.1 Monitor Exploded View FUNCTION 33G6288-Y-L HINGE 37G 510-2 LENS 33G6289-1 HINGE BRACKET 15G6206-1 BEZEL 34G6201-Y-1B STAND 34G1546-Y-B PANEL BRACKET 15G6207-L-3 BASE 34G6203-Y-2B PANEL BRACKET 15G6207-R-3 RUBBER FOOT 12G394-3 REAR COVER 34G6202-Y-1B MYLAR 52G6025-11-925 SHIELD 85G6119-1...

  • Page 15: Software Flow Chart

    AOC 176V 5.2 Software Flow Chart Page 15 of 54...
  • Page 16 AOC 176V 1) MCU initialize. 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. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode.

  • Page 17: Electrical Block Diagram

    AOC 176V 5.3 Electrical Block Diagram 5.3.1 Main Board LCD Interface (CN503) Scalar TSU56AK-LF W78E65P-40 (Include ADC,OSD) (U601) (U401) EPR_SDA EPR_SCL H sync D_H sync EEPROM V sync D_V sync AT24C16N D_RGB (U602) D-Sub DVI-I only Connector Connector (CN301) (CN302)

  • Page 18: Inverter/Power Board

    AOC 176V 5.3.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diode EMI filter and Filter Start Circuit: R906、 R907 CN902 Feedback Over Voltage Control IC Circuit Protect ON/OFF OSC and DC Convert MOSFET Output Circuit Circuit Lamp Over ON/OFF...

  • Page 19: Schematic

    VAA2 VAA3 VAA4 VCC5V onBACKLITE 5.PANEL INTERFACE onPanel_5V/3.3V VCPU VCC12V VCC3.3 VCC2.5 AdjBACKLITE AdjBACKLITE VAA1 VLCD VAA2 VAA3 VAA4 VCC5V Title 4.SCALER VLCD TSU56AK for AOC Size Document Number 2.POWER Date: Wednesday, April 14, 2004 Sheet Page 19 of 54...
  • Page 20 4.7K 1/16W 　 100K 1/16W 　 C217 Q204 onPanel_5V/3.3V 0.068uF PMBS3904 4.7K 1/16W 　 C207 C208 R211 Title 100uF/16V TSU56AK for AOC 0.1uF 10K 1/16W 　 Size Document Number POWER Date: Friday, November 26, 2004 Sheet Page 20 of 54...
  • Page 21 CLK+ clk+ CLK- clk- JACK D306 D307 D308 D309 D310 D311 D312 D313 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 VCC5V Title TSU56AK for AOC Size Document Number INPUT Date: Tuesday, November 09, 2004 Sheet Page 21 of 54...
  • Page 22 C403 22pF 600 OHM BUS TYPE/NC C404 0.1uF C427 BYPASS R401 10uF/16V AVSS_LPLL C428 0.1uF R401 R402 Direct Bus 4.7K Title TSU56AK for AOC 3-WIRE 4.7K Size Document Number SCALER Date: Wednesday, April 14, 2004 Sheet Page 22 of 54...
  • Page 23 LVB3M LVBCKP LVBCKM LVB2P LVB2M CONN R502 LVB1P LVB1M 　 1/16W LVB0P VLCD LVB0M VLCD C509 C510 C511 47uF/16V 0.1uF 0.1uF Title TSU56AK for AOC Size Document Number PANEL INTERFACE Date: Wednesday, April 14, 2004 Sheet Page 23 of 54...
  • Page 24 LEFT POWER R624 1/16W 　 Mute_key C606 C608 C610 OUT-L+ OUT-R+ C616 C609 OUT-L- OUT-R- C607 0.001uF 0.001uF 0.001uF 1uF/25V 0.001uF 0.001uF CONN Title TSU56AK for AOC Size Document Number Date: Wednesday, July 21, 2004 Sheet Page 24 of 54...

  • Page 25: Power Board

    AOC 176V 6.2 Power Board 715G1142-4AUE Page 25 of 54...
  • Page 26 AOC 176V Page 26 of 54...
  • Page 27 AOC 176V Page 27 of 54...

  • Page 28: Audio Board

    AOC 176V 6.3 Audio Board 715G1144-4NMV OUT_L OUT_R +12V PIN-3 CN202 WAFER 2*7P 2.54mm MUTE PIN-1 VOLUME C202 C201 C203 470uF/16V 470uF/16V 0.1uF U201 TDA7496L CN204 C205 CN203 C204 0.47uF R201 10K　 OUTL 470uF/16V C206 0.47uF OUTR 10K　 R203 R212...

  • Page 29: Pcb Layout

    AOC 176V 7. PCB Layout 7.1 Main Board 715L1237-1-3 Page 29 of 54...

  • Page 30: Power Board

    AOC 176V 7.2 Power Board 715G1142–4-AUE 7.3 Audio Board 715G1144-4NMV 7.4 Key Board 715L1496-1-E Page 30 of 54...

  • Page 31: Maintainability

    AOC 176V 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 31 of 54...

  • Page 32: Trouble Shooting

    AOC 176V 8.2 Trouble Shooting 8.2.1 Main Board 1. NO SCREEN APPEAR Measured CN201 pin5/6 = 12V? Check Correspondent component. Measured CN201 pin 9/10= 5V? Is there any shortage or cold solder? Measured U202 pin 2= 3.3V? Yes, all DC level exist Yes.
  • Page 33 AOC 176V 2. PANEL POWER CIRCUIT Check R207 should have response from 0V to 5V Measured X601 waveform is normal? When we switch the power switch from off to on Replace X601 (20MHz) Check Q204, Q203 is broken or CN503 solder abnormal?
  • Page 34 AOC 176V 4. U4-DATA OUTPUT Measured X401 waveform Replace X401(14.318MHz) normal? Check MST8011 (U401) Check relative circuit to panel Signal output (PIN102-103, 106-113,118-125,128,1) Is the waveform ok? Check relative component Check HS/VS input signal are normal? Replace U401 Page 34 of 54...

  • Page 35: Power/Inverter Board

    AOC 176V 8.2.2 Power/Inverter Board No power Check CN902 pin2, 4 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905(+) Check bridge rectified circuit and F901 circut Check start voltage for the pin3 of IC901...
  • Page 36 AOC 176V 2.) W / LED, No Backlight Check C201 (+) =12V Change F902 Check ON/OFF signal Check main board Check U201 pin9=12V Change Q201 or Q202 Check the pin1 of U201 have sawtooth wave Change U201 Check D201/D202 have the output of square ware at short time...

  • Page 37: Keypad Board

    AOC 176V 8.2.3 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? Check Main Board...

  • Page 38: White-Balance, Luminance Adjustment

    6500 color temp. parameter is x = 313±20, y = 329 ±20, Y =180 cd/m 3. Into factory mode of 196V 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 39: Edid Content

    AOC 176V 10. EDID Content 1.Analog EDID 112: 2.Digital EDID 112: Page 39 of 54...

  • Page 40: Bom List

    AOC 176V 11. BOM List T980KH2HD4A1A Location Part NO. for TPV Description Quantity Unit AUPC980KA1 AUDIO BOARD FOR T980* CBPC980KH2A2 CONVERSION BOARD KEPC980KADE1 KEY BOARD PWPC1942HSE5C POWER BOARD 15G6207 L 3 PANEL BRACKET 15G6207 R 3 PANEL BRACKET 44G3231 15600...
  • Page 41 AOC 176V AM1G1740 12128 SCREW 705L980KB34143 15G6206 1 HINGE BRACKET 34G6202 Y 1B REAR COVER Q1G 140 8128 SCREW 705L980KF34011 33G6288 Y L FUNC TINO 33G6289 1 LENS 34G6201 Y 1B BEZEL Q1G1030 8128 SCREW 705L980KP34017 12G 394 3 RUBBER FOOT...
  • Page 42 AOC 176V R203 61L0603183 CHIP 18K OHM 1/10W R207 61L0603102 RST SM 0603 RC0603 1K P R208 61L0603102 RST SM 0603 RC0603 1K P R210 61L0603203 CHIPR 20K OHM+-5% 1/10W R211 61L0603203 CHIPR 20K OHM+-5% 1/10W 715G1144 4NMV C209 67G 2151007NT KY50VB10M-TP5 5*11.5...
  • Page 43 AOC 176V C210 65G0603104 32 CHIP 0.1UF 50V X7R C212 65G0603104 32 CHIP 0.1UF 50V X7R C214 65G0603104 32 CHIP 0.1UF 50V X7R C216 65G0603104 32 CHIP 0.1UF 50V X7R C217 65G0603683 32 CHIP 0.068UF 50L X7R C304 65G0603473 32 CHIP 0.047UF 50V X7R...
  • Page 44 AOC 176V C428 65G0603104 32 CHIP 0.1UF 50V X7R C510 65G0603104 32 CHIP 0.1UF 50V X7R C511 65G0603104 32 CHIP 0.1UF 50V X7R C601 65G0603104 32 CHIP 0.1UF 50V X7R C602 65G0603220 31 CER1 0603 NP0 50V 22P P C604...
  • Page 45 AOC 176V D323 93G 39147 TZMC5V6 FB201 71G 56Z601 CHIP BEAD 600 OHM 0805 FB301 61L0603000 RST SM 0603 JUMP MAX 0R FB302 61L0603000 RST SM 0603 JUMP MAX 0R FB303 61L0603000 RST SM 0603 JUMP MAX 0R FB304 71G 56G151 A...
  • Page 46 AOC 176V R306 61L0603101 RST SM 0603 RC0603 100R R307 61L0603101 RST SM 0603 RC0603 100R R308 61L0603103 RST SM 0603 RC0603 10K R309 61L0603101 RST SM 0603 RC0603 100R R310 61L0603102 RST SM 0603 RC0603 1K P R311 61L0603102...
  • Page 47 AOC 176V R617 61L0603121 CHIPR 120 OHM 1/10W R618 61L0603121 CHIPR 120 OHM 1/10W R619 61L0603472 RST SM 0603 RC0603 4K7 R620 61L0603471 CHIPR 470 OHM+-5% 1/10W R621 61L0603471 CHIPR 470 OHM+-5% 1/10W R622 61L0603471 CHIPR 470 OHM+-5% 1/10W R623...
  • Page 48 AOC 176V 715L1496 1 E KEY BOARD R101 61G 60275052T 75OHM 5% 1/6W R102 61G 60275052T 75OHM 5% 1/6W PWPC1942HSE5C 705L 980 65 02 19" C901 ASS'Y PW1942HSE5SMTC POWER BOARD FOR SMT 40G 45762412B CBPC LABEL 1.03 1174 TYPE 52G6025 11672...
  • Page 49 AOC 176V CN205 33G8021 2D AC CONN.2P R/A 87210-0236 CN301 88G 30210K E PHONE JACK 5PIN CN304 95G8013 3 31 WIRE HARNESS CN902 95G8021 12509 WIRE HARNESS D901 93G 6026T52T RECTIFIER DIODE FR107 D902 93G 6038P52T PS102R F901 84G 7H200 SL...
  • Page 50 AOC 176V C211 65G0805105 27 CHIP 1UF Y5V 0805 C212 65G0805105 27 CHIP 1UF Y5V 0805 C219 65G0805105 27 CHIP 1UF Y5V 0805 C220 65G0805105 27 CHIP 1UF Y5V 0805 C224 65G0805105 27 CHIP 1UF Y5V 0805 C225 65G0805105 27...
  • Page 51 AOC 176V Q208 57G 417 6 PMBS3906/PHILIPS-SMT(06 Q902 57G 417 4 PMBS3904/PHILIPS-SMT(04 Q903 57G 417 6 PMBS3906/PHILIPS-SMT(06 R106 61L0603333 CHIP 33K OHM 1/10W R107 61L0603000 RST SM 0603 JUMP MAX 0R R108 61L0603473 RST SM 0603 RC0603 47K R109 61L0603302...
  • Page 52 AOC 176V R923 61L0805000 CHIP O OHM 1/8W R924 61L0805102 CHIPR 1K OHM +-5% 1/8W R925 61L0805102 CHIPR 1K OHM +-5% 1/8W R926 61L0805931 1F CHIP 9.31K OHM 1/8W 1% R927 61L0805243 1F CHIP 2.43K OHM 1/8W 1% U201 56G 622 1...
  • Page 53 AOC 176V R112 61G 60227252T 2.7KOHM 5% 1/6W R201 61G 60220352T CFR 20K OHM+-5% 1/6W R202 61G 60210352T CFR 10KOHM +-5% 1/6W R203 61G 60210352T CFR 10KOHM +-5% 1/6W R204 61G 60210352T CFR 10KOHM +-5% 1/6W R205 61G 60247352T 47KOHM 5% 1/6W...
  • Page 54 AOC 176V 95G 900 43 SIGNAL CABLE 96G 29 6 SHRINK TUBE UL/CSA CN901 87G 501 19 RF AC SOCKET 90G6081500 HEAT SINK M1G1730 8128 SCREW M3x8 D910 93G 60237 SRF20100C D911 93G 60237 SRF20100C 96G 29 1 SHRINK TUBE UL/CSA...

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