AOC 172V Service Manual
AOC 172V Service Manual

AOC 172V Service Manual

17 inch lcd color monitor

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17" LCD Color Monitor
Service
Service
Description
Table Of Contents..........................................................1
Revision List.................................................................2
1. Monitor Specification..................................................3
2.LCD Monitor Description........................................4
3. Operation Instruction.............................................5
3.1 General Instructions...................................................5
3.2 Control Button....................................................5
3.3 Adjusting the Picture..........................................5
4. Input/Output Specification.......................................7
4.1 Input Signal Connector.......................................7
4.2 Factory Preset Display Modes.........................7
5 Panel Specification..................................................8
5.1 Display Characteristics....................................8
5.2 Optical Characteristics......................................8
6.Block Diagram...............................................10
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
6.1 Software Flow Chat.........................................10
6.2 Electrical Block Diagram.................................12
7. Schematic.................................................... 14
7.1 Main Board..........................................................14
7.2 Power Board.......................................................19
8. PCB Layout.....................................................21
8.1 Main Board.....................................................21
8.2 Power Board.........................................................24
8.3 Key Board........................................................27
9. Maintainability................................................28
9.2. Trouble Shooting................................................29
11.Monitor Exploded View...................................35
12. BOM List..............................................................36
SAFETY NOTICE
1
AOC 172V
Horizontal Frequency
30-80 kHz
Page

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Summary of Contents for AOC 172V

  • Page 1: Table Of Contents

    17" LCD Color Monitor AOC 172V Service Service Horizontal Frequency 30-80 kHz TABLE OF CONTENTS Description Page Description Page 6.1 Software Flow Chat…….…..…………..10 Table Of Contents..……....……...…..1 6.2 Electrical Block Diagram………...………...…..12 Revision List.…......………....……..2 7. Schematic……………………………………………. 14 1. Monitor Specification.........………..3 7.1 Main Board…………..........14 2.LCD Monitor Description……………………………..4...
  • Page 2: Revision List

    17" LCD Color Monitor AOC 172V Revision List Revision Date Revision History TPV Model Mar.-03-2008 Initial release T78SM5NCARSPNNE...
  • Page 3: Monitor Specification

    17" LCD Color Monitor AOC 172V 1. Monitor Specifications Driving system TFT Color LCD Size 43.2cm(17.0") LCD Panel Pixel pitch 0.264mm( H )x 0.264mm( V ) Video R,G,B Analog Interface Separate Sync. H/V TTL Input H-Frequency 30kHz – 80kHz V-Frequency...
  • Page 4: Lcd Monitor Description

    17" LCD Color Monitor AOC 172V 2. LCD Monitor Description The LCD MONITOR will contain a main board, a power board, an audio board and a key board which house the flat panel control logic, brightness control logic and DDC.
  • Page 5: Operation Instruction

    17" LCD Color Monitor AOC 172V 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 6 17" LCD Color Monitor AOC 172V Main Menu Main Menu Sub Menu Item Sub Menu Icon Description Item Icon Contrast Contrast from Digital-register. Luminance Brightness Backlight Adjustment Adjust Picture Phase to reduce Horizontal-Line Focus noise Image Setup Clock Adjust picture Clock to reduce Vertical-Line noise.
  • Page 7: Input/Output Specification

    17" LCD Color Monitor AOC 172V 4. Input/Output Specification 4.1 Input Signal Connector PIN NO. DESCRIPTION PI N NO. DESCRIPTION Green Detect Cable Blue DDC-Serial Data Ground H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground VGA connector layout 4.2 Factory Preset Display Modes...
  • Page 8: Panel Specification

    17" LCD Color Monitor AOC 172V 5 Panel Specification 5.1 Display Characteristics 5.2 Optical Characteristics...
  • Page 9: Parameter Guide Line For Ccfl Inverter

    17" LCD Color Monitor AOC 172V 5.3 Parameter guide line for CCFL Inverter 1.TFT LCD Module: 2.Back Light Unit:...
  • Page 10: Block Diagram

    17" LCD Color Monitor AOC 172V 6. Block Diagram 6.1 Software Flow Chat...
  • Page 11 17" LCD Color Monitor AOC 172V 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.
  • Page 12: Electrical Block Diagram

    17" LCD Color Monitor AOC 172V 6.2 Electric Block Diagram 6.2.1 Main Board LCD Interface (CN101) FLASH MEMORY Scalar TSUM16AK PM25LV512A (U402) (Include: MCU, ADC, OSD etc) (U401) H sync V sync EEPROM 24C16N (U403) D-Sub Connector (CN405) DB12_SDA, DB15_SCL...
  • Page 13 17" LCD Color Monitor AOC 172V 6.2.2 Inverter / Power Board Bridge Rectifier Transformer AC input Rectifier diode EMI filte r and Filter Start Circuit: R905、R906、 CN102 R907、R908、R909、R910 Over Control IC Voltage Protect ON/OFF OSC and DC Convert MOSFET Output...
  • Page 14: Schematic

    17" LCD Color Monitor AOC 172V 7. Schematic 7.1 Main Board TSUM16AK SCHEMATIC XGA/SXGA LVDS OUTPUT GNDR GNDR GNDG GNDG GNDB GNDB HSYNC HSYNC VCC1.8 VCC3.3 +12V VSYNC VSYNC DDCA_SDA DDCA_SDA DDCA_SCL DDCA_SCL DET_VGA DET_VGA DDC_WP DDC_WP VCC1.8 Vcc3.3 +12V...
  • Page 15 17" LCD Color Monitor AOC 172V SOT-223 U701 VCTRL 4 +3V3 NC/LT1117-18 R702 +3V3 51 1/16W   C701 C703 C704 VCC1.8 100uF/25V C702 VCC1.8 4 4.7uF/16V D701 BL_ADJ(DC) 0V ~ 3.3V 4.7K 1N4148 0V ~ 5V 4.7K 4.7K MMBT3904 R703...
  • Page 16 17" LCD Color Monitor AOC 172V CN405 FB410   1/16W DB15 RED+ R434 1/16W C432 0.047uF   RED- GREEN+ FB411   1/16W R435   1/16W C433 0.047uF GREEN- BLUE+ FB412   1/16W R436   1/16W C434 0.047uF BLUE- PC5V R437  ...
  • Page 17 17" LCD Color Monitor AOC 172V VDVI VMPLL VPLL AVDD VDDP VDDC VCC1.8 FB401 VDDC VCC3.3 FB402 AVDD VCC1.8 600 OHM VCC3.3 600 OHM C403 C407 U401 VCC3.3 4.7uF/16V 0.1uF VCTRL VCTRL C404 C405 C406 0.1uF 0.1uF 0.1uF NC/LVACKP/NC RIN0P...
  • Page 18 17" LCD Color Monitor AOC 172V PB[0..5] PB[0..5] CN102 CN103 PA[0..7] RB1P PA[0..7] PA[0..7] RB1N PA[0..7] LVACKP FB0N RB2P RA3N RB3N RA1P LVACKM RB2N RA3P FB0P RB3P LVA2P RA1N RB3P RA2P LVA2M RB3N RA2N FB1N RB2N LVA1P FB1P RA2N RA2P...
  • Page 19: Power Board

    17" LCD Color Monitor AOC 172V 7.2 Power Board...
  • Page 20 17" LCD Color Monitor AOC 172V...
  • Page 21: Pcb Layout

    17" LCD Color Monitor AOC 172V 8. PCB Layout 8.1 Main Board...
  • Page 22 17" LCD Color Monitor AOC 172V...
  • Page 23 17" LCD Color Monitor AOC 172V...
  • Page 24: Power Board

    17" LCD Color Monitor AOC 172V 8.2 Power Board...
  • Page 25 17" LCD Color Monitor AOC 172V...
  • Page 26 17" LCD Color Monitor AOC 172V...
  • Page 27: Key Board

    17" LCD Color Monitor AOC 172V 8.3 Key Board...
  • Page 28: Maintainability

    17" LCD Color Monitor AOC 172V 9. Maintainability 9.1 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 172V 9.2 Trouble Shooting 9.2.1 Main Board 1. NO SCREEN APPEAR 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...
  • Page 30 17" LCD Color Monitor AOC 172V No picture (LED orange) No picture Measure U401 PIN28=3.3V Replace U401 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...
  • Page 31 17" LCD Color Monitor AOC 172V 9.2.2 Power Board 1. No Power Check CN102 pin12 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905(+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901...
  • Page 32 17" LCD Color Monitor AOC 172V 2. W/LED No Backlight Check CN102 pin12 =12V Check adapter or MB Check ON/OFF signal Check Interface board Check U201 pin9=12V Change Q201 or Q202 Check U201 PIN10,7 have the output of square wave at short...
  • Page 33 17" LCD Color Monitor AOC 172V 9.2.3 Key Board OSD is unstable or not working Connect Key Pad Board Is Key Pad Board connecting normally ? Replace Button Switch Is Button Switch normally ? Replace Key Pad Board Is Key Pad Board normally ?
  • Page 34: White-Balance, Luminance Adjustment

    6500 color temp. parameter is x = 313±20, y = 329 ±20, Y =180 cd/m 3. Into factory mode of 172V 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 35: Monitor Exploded View

    17" LCD Color Monitor AOC 172V 11. Monitor Exploded View...
  • Page 36: Bom List

    PANEL LTM170EU-L31 8TM H33G6246 KG L HINGE COVER H34G6171 KG 1L BACK COVER H34G6177 KGA1L LOGO COVER H40G 17N61514C 172V ID label H41G170061512B 172V MANUAL H44G3749615 7C CARTON H45G 87 1 2H PE BAG FOR MONITOR Q45G 76 28 H...
  • Page 37 17" LCD Color Monitor AOC 172V Q403 57G 417517 LMBT3906LT1G SOT-23 BY Q402 57G 417518 LMBT3904LT1G SOT-23 BY Q701 57G 417518 LMBT3904LT1G SOT-23 BY Q703 57G 417518 LMBT3904LT1G SOT-23 BY Q706 57G 417518 LMBT3904LT1G SOT-23 BY Q704 57G 763 1...
  • Page 38 17" LCD Color Monitor AOC 172V R474 61G0603392 RST CHIPR 3.9KOHM +-5% R475 61G0603392 RST CHIPR 3.9KOHM +-5% R437 61G0603471 RST CHIPR 470 OHM +-5% R405 61G0603472 RST CHIPR 4.7KOHM +-5% R422 61G0603472 RST CHIPR 4.7KOHM +-5% R423 61G0603472 RST CHIPR 4.7KOHM +-5%...
  • Page 39 17" LCD Color Monitor AOC 172V C443 65G0603221 32 CHIP 220PF 50V X7R C425 65G0603224 22 CAP 0603 0.22UF +-10% 2 C442 65G0603330 31 CAP 0603 33PF +-5% 50V C432 65G0603473 32 CAP 0603 0.047UFK 50V X C433 65G0603473 32 CAP 0603 0.047UFK 50V X...
  • Page 40 17" LCD Color Monitor AOC 172V C904 63G107K474 US 0.47UF +-10% C213 63G210J2242AC CAPACITANCE C214 63G210J2242AC CAPACITANCE C936 64G701J1040AT CAP SMPE 0.1UF J 63VDC C215 65G 3J2206ET 22PF 5% SL 3KV TDK C216 65G 3J2206ET 22PF 5% SL 3KV TDK...
  • Page 41 17" LCD Color Monitor AOC 172V R911 61G1206100 3F RST CHIPR 100KOHM +-1% R918 61G1206103 RST CHIPR 10KOHM +-5% 1 R916 61G1206104 RST CHIPR 100KOHM +-5% R901 61G1206105 RST CHIPR 1MOHM +-5% 1/ R902 61G1206105 RST CHIPR 1MOHM +-5% 1/...
  • Page 42 17" LCD Color Monitor AOC 172V J901 95G 90 23 TINCOATEDCOPPER J902 95G 90 23 TINCOATEDCOPPER J903 95G 90 23 TINCOATEDCOPPER J904 95G 90 23 TINCOATEDCOPPER J905 95G 90 23 TINCOATEDCOPPER J906 95G 90 23 TINCOATEDCOPPER J907 95G 90 23...
  • Page 43 17" LCD Color Monitor AOC 172V IC903 56G 158 10 T AZ431AZ-AE1 TO-92 IC904 56G 158 10 T AZ431AZ-AE1 TO-92 C911 64G701J1020AT CAP SMPE 1KPF J 63VDC R C204 64G701J1040AT CAP SMPE 0.1UF J 63VDC C205 64G701J1040AT CAP SMPE 0.1UF J 63VDC...

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