AOC 919SWA Service Manual
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AOC 919SWA Service Manual

19" lcd color monitor
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19" LCD Color Monitor
Service
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.......................................8
4.1 Input Signal Connector.......................................8
4.2 Factory Preset Display Modes.........................8
5 Panel Specification..................................................9
5.1 Display Characteristics....................................9
5.2 Optical Characteristics......................................10
5.3 Electrical Characteristics....................................11
6.Block Diagram...............................................13
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
Downloaded from ManualMonitor.com Manuals

TABLE OF CONTENTS

Page
Description
6.1 Software Flow Chat.........................................13
6.2 Electrical Block Diagram.................................15
7. Schematic.................................................... 17
7.1 Main Board..........................................................17
7.2 Power Board.......................................................21
8. PCB Layout.....................................................24
8.1 Main Board.....................................................24
8.2 Power Board.........................................................26
8.3 Key Board.......................................................28
9. Maintainability................................................28
9.2. Trouble Shooting................................................30
11.Monitor Exploded View...................................38
12. BOM List..................................................... .........40
SAFETY NOTICE
1
AOC 919Swa
Horizontal Frequency
30-80 kHz
Page

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Summary of Contents for AOC 919SWA

  • Page 1: Table Of Contents

    19" LCD Color Monitor AOC 919Swa Service Service Service Horizontal Frequency 30-80 kHz TABLE OF CONTENTS Description Page Description Page 6.1 Software Flow Chat…….…..…………..13 Table Of Contents..……....……...…..1 Revision List.…......………....……..2 6.2 Electrical Block Diagram………...………...…..15 7. Schematic……………………………………………. 17 1. Monitor Specification.........………..3 7.1 Main Board…………..........17 2.

  • Page 2: Revision List

    19" LCD Color Monitor AOC 919Swa Revision List Revision Date Revision History Remark T99LHDDBWKA1ANE Initial release T992HDDBWKA2ANE Dec.-25-2009 IVO M190MWW3 Panel list TPV TPM190A1 Downloaded from ManualMonitor.com Manuals...

  • Page 3: Monitor Specification

    19" LCD Color Monitor AOC 919Swa 1. Monitor Specifications Model name 919Swa Driving system TFT Color LCD Viewable Image Size 48.1cm diagoanl Pixel pitch 0.2835mm(H) x 0.2835mm(V) LCD Panel Video R, G, B Analog lnterface Separate Sync. H/V TTL Display Color 16.7M Colors...

  • Page 4: Lcd Monitor Description

    19" LCD Color Monitor AOC 919Swa 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

    19" LCD Color Monitor AOC 919Swa 3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor (See Figure ). By changing these settings, the picture can be adjusted to your personal preferences.
  • Page 6 19" LCD Color Monitor AOC 919Swa Text Internet Mode Internet Game Mode Game Movie Mode Movie Sports Mode Sports Gamma1 Adjust to Gamma1 Gamma Gamma2 Adjust to Gamma 2 Gamma3 Adjust to Gamma 3 Disable dynamic contrast ratio Enable dynamic contrast ratio...
  • Page 7 19" LCD Color Monitor AOC 919Swa Disable or Enable AutoDetect AutoDetect on or off Mode Demo on or off Disable or Enable Demo Picture Boost Frame Size 14-100 Adjust Frame Size Brightness 0-100 Adjust Frame Brightness Contrast 0-100 Adjust Frame Contrast H.

  • Page 8: Input/Output Specification

    19" LCD Color Monitor AOC 919Swa 4. Input/Output Specification 4.1 Input Signal Connector Pin Number 15-Pin Side of the Signal Cable Pin Number 15-Pin Side of the Signal Cable Video-Red Video-Green Ground Video-Blue N.C. N.C. DDC-Serial data Detect Cable H-sync...

  • Page 9: Panel Specification

    19" LCD Color Monitor AOC 919Swa 5 Panel Specification 5.1 Display Characteristics M190MWW3 The M190MWW3 is a color active matrix thin film transistor (TFT) liquid crystal display (LCD) that uses amorphous silicon TFT as a switching device. It is composed of a TFT LCD panel, a timing controller, voltage reference, common voltage, driver DC-DC converter, column driver, and row driver circuit.

  • Page 10: Optical Characteristics

    19" LCD Color Monitor AOC 919Swa Note (1) Please refer to the attached drawings for more information of front and back outline dimensions. 5.2 Optical Characteristics M190MWW3 TPM190A1 Downloaded from ManualMonitor.com Manuals...

  • Page 11: Electrical Characteristics

    19" LCD Color Monitor AOC 919Swa 5.3 Electrical Characteristics 1.TFT LCD Module: M190MWW3 Note: A. If it exceeds MIN/MAX values, then "CCFL Life", "ON/OFF Cycle", and "SAFETY" will not be guaranteed. B. CCFL Frequency should be carefully determined to avoid interference between inverter and TFT LCD.
  • Page 12 19" LCD Color Monitor AOC 919Swa TPM190A1 Downloaded from ManualMonitor.com Manuals...

  • Page 13: Block Diagram

    19" LCD Color Monitor AOC 919Swa 6. Block Diagram 6.1 Software Flow Chat Downloaded from ManualMonitor.com Manuals...
  • Page 14 19" LCD Color Monitor AOC 919Swa REMARK: 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 15: Electrical Block Diagram

    19" LCD Color Monitor AOC 919Swa 6.2 Electric Block Diagram 6.2.1 Main Board Crystal 24.576MHz Panel Interface (X401) (CN405) Key Control Scalar HX6803-A000LAG FLASH MEMORY Interface (Include :MCU,ADC,OSD etc) SST25LF020A-33-4C-SAE (CN408) (U401) (U402) D-Sub EEPROM Connector M24C04-WMN6TP (CN101) (U406) DDC1_SDA...
  • Page 16 19" LCD Color Monitor AOC 919Swa 6.2.2 Inverter / Power Board Transformer AC input Bridge EMI filter (T901) Rectifier diodes Rectifier,Filter Start Circuit (R904,R905， R906) Power Switch PWM Control IC (Q901) LD7576 (IC901) Photocoupler Regulator (IC903) (IC904) MOSFET (Q805,Q806) Output...

  • Page 17: Schematic

    19" LCD Color Monitor AOC 919Swa 7. Schematic 7.1 Main Board H_Sy nc R101 80 OHM R102 1K 1/16W 5% DSUB_H V_Sy nc R103 1K 1/16W 5% DSUB_V R122 R104 C101 VGA_B+ DSUB_B+ R105 R106 C102 C103 2K2 1/16W 5%...
  • Page 18 19" LCD Color Monitor AOC 919Swa FB405 VDDA_AD VCC3.3 BEAD C404 VDDDP_AD CMVCC 0.1uF/16V VSSA_AD VCCLVP VCC3IO CMVCC VCCK VDDA_AD VCCP VDDP_AD R465 VDDP_AD FB406 6K8 1/16W 5% BEAD C433 AC_DET R467 10K 1/16W 5% C442 0.1uF/16V VSSP_AD R466 C450...
  • Page 19 19" LCD Color Monitor AOC 919Swa PANEL_VCC CN403 VCC3.3D 5 AO3401L CMVCCD 5 R433 C419 R481 R435 10K 1/16W 5% 0.1uF/16V 47K 1/16W 5% PANEL_VCC 4K7 1/16W 5% R436 Q405 51K OHM 1/16W AO3401 FB402 on_Panel Q404 on_Panel PMBS3906 C447...
  • Page 20 19" LCD Color Monitor AOC 919Swa ESD_5V ESD_5V VCC3.3 VCC3.3 DSUB_5V CMVCCD 4 FB407 300 OHM D403 BAT54C R437 R439 DSUB_5V CMVCC 10K 1/16W 5% 10K 1/16W 5% CN404 BKLT_EN CMVCC1 R478 CMVCC CMVCC1 D402 Q406 D401 VCC1.8 CMVCC C425...

  • Page 21: Power Board

    19" LCD Color Monitor AOC 919Swa 7.2 Power Board +16V R805 100R 1/10W 5% ON/OFF D801 LL4148 Q805 CN801 PT801 POWER X'FMR C819 R806 100R 1/8W 68pF/3KV ZD802 C816 RLZ5.6B 22pF/6KV ZD803 D802 LL4148 CN802 RLZ5.6B R803 R804 5K1 1/8W...
  • Page 22 19" LCD Color Monitor AOC 919Swa L904 100 OHM 1/4W R918 FB904 +16V 100 OHM 1/4W R919 C912 BEAD BD901 0.001uF R946 ZD902 GBU408 100 OHM 1/4W R920 150OHM2W RLZ18B C917 C918 680uF25V 680uF25V FB902 T901 Q903 R943 POWER X'FMR...
  • Page 23 19" LCD Color Monitor AOC 919Swa +5V1 +5V1 R602 10K 1/10W 5% C604 100uF/25V R603 10K 1/10W 5% C609 1uF/25V 10K 1/10W 5% R609 IC601 CONN LOUT- SE/BTL LOUT- CN601 VOLUME LOUT+ C601 0.47uF/16V LIN- LOUT+ ROUT+ R604 10K 1/10W 5% C606 0.47uF/16V...

  • Page 24: Pcb Layout

    19" LCD Color Monitor AOC 919Swa 8. PCB Layout 8.1 Main Board Downloaded from ManualMonitor.com Manuals...
  • Page 25 19" LCD Color Monitor AOC 919Swa Downloaded from ManualMonitor.com Manuals...

  • Page 26: Power Board

    19" LCD Color Monitor AOC 919Swa 8.2 Power Board Downloaded from ManualMonitor.com Manuals...
  • Page 27 19" LCD Color Monitor AOC 919Swa Downloaded from ManualMonitor.com Manuals...

  • Page 28: Key Board

    19" LCD Color Monitor AOC 919Swa 8.3 Key Board Downloaded from ManualMonitor.com Manuals...

  • Page 29: Maintainability

    19" LCD Color Monitor AOC 919Swa 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. Downloaded from ManualMonitor.com Manuals...

  • Page 30: Trouble Shooting

    19" LCD Color Monitor AOC 919Swa 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...
  • Page 31 19" LCD Color Monitor AOC 919Swa No picture (LED orange) No picture Measure U404 Vout=3.3V U405 Vout=1.8V Replace U404,U405,CN404 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable is connected normally...
  • Page 32 19" LCD Color Monitor AOC 919Swa White Screen White screen Measure Q404base X401 oscillate is low level? waveform is normal Replace X401 Check reset circuit of U401 Check FB402,Q405 is is normal broken,or CN405 solder? Check Correspondent Check Correspondent component.
  • Page 33 19" LCD Color Monitor AOC 919Swa 9.2.2 Power Board 1. No Power Check ZD902 = 16V Check AC line volt 110V or 240V Check AC input Check the voltage of C905(+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901...
  • Page 34 19" LCD Color Monitor AOC 919Swa 2. W/LED No Backlight Check C812 (+) =16V Change adapter and MB Check ON/OFF signal Check main board Check IC801 pin15=16V Change Q801 Check the pin13 of IC801 have saw tooth wave Change IC801...
  • Page 35 19" LCD Color Monitor AOC 919Swa 9.2.3 Key Board OSD is unstable or not working Is Keypad board connecting normally? Connect Keypad Board Is Button Switch normally? Replace Button Switch Replace Keypad Board Is Keypad board normally? Check main board...

  • Page 36: White-Balance, Luminance Adjustment

    = 313 ±30, y = 329 ±30, Y = 180cd/m2 3. Into Factory mode of AOC 919Swa 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 19" LCD Color Monitor AOC 919Swa C. Adjust Cool (9300K) color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 313 ±30, y = 329 ±30, Y = 200 cd/m2 4.

  • Page 38: Monitor Exploded View

    19" LCD Color Monitor AOC 919Swa 11. Monitor Exploded View Downloaded from ManualMonitor.com Manuals...
  • Page 39 19" LCD Color Monitor AOC 919Swa Item Description Item Description BEZEL(L19WA-8Q1A) HINGE LENS STAND TOP KEY PAD STAND KEY BOARD BASE8S2 PANEL FOOT POWERBOARD SCREW MAIN BOARD SCREW MAIN FRAME SCREW SCREW REAR COVER19" Downloaded from ManualMonitor.com Manuals...

  • Page 40: Bom List

    REAR COVER19" Q34G0316BBLC1B0130 BEZEL(L19WA-8Q1A) Q45G 76 28 H PE BAG FOR MANUAL Q50G 4 10 TIE (Y1900221) Q52G 1185 99 big carton tape for aoc AM1G1740 10120 SCREW(M4*10) H34G0026AED 1B0100 STAND Q34G0299AED 1B0130 BASE8S2 Q37G0067015 HINGE 756GH9CB A1048 MAIN BOARD-CBPC9HDA1H1...
  • Page 41 19" LCD Color Monitor AOC 919Swa CN404 033G3802 9B Y WAFER CN405 033G801930F CH JS CONNECTOR 040G 45762412B CBPC LABEL R438 061G152M33964L RST MOFR 3.3 OHM +-5% 2WS CN101 088G 35315F XH D-SUB 15PIN VERTICAL CONN WITH SCREW X401 093G 2258B J NXS24.576AC20F-KAB11...
  • Page 42 19" LCD Color Monitor AOC 919Swa EC 105℃ 100uF M 16V 5*11mm C423 067G 3051013PB EC 105℃ 100uF M 16V 5*11mm C426 067G 3051013PB EC 105℃ 100uF M 16V 5*11mm C424 067G 3051013PB EC 105℃ 100uF M 16V 5*11mm C427...
  • Page 43 19" LCD Color Monitor AOC 919Swa R421 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R433 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R437 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R439 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R457 061G0402103...
  • Page 44 19" LCD Color Monitor AOC 919Swa C413 065G040210412K CAP CHIP 0402 100nF K 16V X7R C414 065G040210412K CAP CHIP 0402 100nF K 16V X7R C415 065G040210412K CAP CHIP 0402 100nF K 16V X7R C416 065G040210412K CAP CHIP 0402 100nF K 16V X7R...
  • Page 45 19" LCD Color Monitor AOC 919Swa Q803 057G 759 2 RK7002FD5T116 SOT-23 BY ROHM Q805 057G 763905 FET FDS8958A SO-8 Q806 057G 763905 FET FDS8958A SO-8 R846 061G0603000 RST CHIP MAX 0R05 1/10W R849 061G0603000 RST CHIP MAX 0R05 1/10W...
  • Page 46 19" LCD Color Monitor AOC 919Swa R829 061G0805682 RST CHIPR 6.8 KOHM +-5% 1/8W RJ802 061G1206000 RST CHIP MAX 0R05 1/4W J802 061G1206000 RST CHIP MAX 0R05 1/4W RJ801 061G1206000 RST CHIP MAX 0R05 1/4W RJ901 061G1206000 RST CHIP MAX 0R05 1/4W...
  • Page 47 19" LCD Color Monitor AOC 919Swa C809 065G080556131G MLCC 0805 560PF G 50V NPO C935 065G1206102 72 CAP CHIP 1206 1000PF K 500V X7R C929 065G1206102 72 CAP CHIP 1206 1000PF K 500V X7R C912 065G1206102 72 CAP CHIP 1206 1000PF K 500V X7R...
  • Page 48 19" LCD Color Monitor AOC 919Swa J825 095G 90 23 JUMPER WIRE J824 095G 90 23 JUMPER WIRE J823 095G 90 23 JUMPER WIRE J837 095G 90 23 JUMPER WIRE J912 095G 90 23 JUMPER WIRE J910 095G 90 23...

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