AOC 731FW Service Manual

AOC 731FW 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 Specifications...............................................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.......................................10
4.1.Input Signal Connector..........................................10
4.2.Factory Preset Display Modes.........................10
4.3.Panel Specification...............................................11
5.Block Diagram.........................................................13
5.1.Software Flow Chart...................................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
R FOR TH
UNIT WHEN S

TABLE OF CONTENTS

Page
Description
5.2.Electrical Block Diagram.............................15
6.Schematic......................................................17
6.1 Main Board.........................................................17
6.2 Power Board........................................................22
7.PCB Layout................................................24
7.1.Main Board....................................................24
7.2.Power Board..............................................26
7.3.Key Board........................................................27
8.Maintainability..................................................28
8.2.Trouble Shooting.................................................29
10.Monitor Exploded View......................................37
11.BOM List.............................................................38
12.Differnent Parts List........................................49
SAFETY NOTICE
1
AOC 731FW
Horizontal Frequency
36.5-57.75 kHz
Page

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Summary of Contents for AOC 731FW

  • Page 1: Table Of Contents

    17" LCD Color Monitor AOC 731FW Service Service Service Horizontal Frequency 36.5-57.75 kHz TABLE OF CONTENTS Description Page Description Page Table Of Contents..……....……...…..1 5.2.Electrical Block Diagram…………..…..…..15 Revision List.…......………....……..2 6.Schematic…………….......…..17 6.1 Main Board……………..........17 Important Safety Notice.………….…....……..3 6.2 Power Board..……..........22 1.Monitor Specifications......………..4 7.PCB Layout..…………........24...
  • Page 2: Revision List

    17" LCD Color Monitor AOC 731FW Revision List Revision Date Revision History TPV Model T77CMBNPW5A5NN T77CMBNQW5A2NN Apr.-21-2008 First Version Release T77CMBNQW5A3NN T77CMBNQW5A4NN T77CMBNQW5A17N May-06-2008 Add new BOM T77CMBNPW5A5NG May-11-2008 Add new BOM T77CMBNCW5A2NN...
  • Page 3: Important Safety Notice

    AOC 731FW 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 Specifications

    17" LCD Color Monitor AOC 731FW 1. Monitor Specifications Model number 731Fw Driving system TFT Color LCD Viewable Image Size 427mm diagoanl Pixel pitch 0.291mm(H) x 0.291mm(V) LCD Panel Video R, G, B Analog interface Separate Sync. H/V TTL Display Color...
  • Page 5: Lcd Monitor Description

    17" LCD Color Monitor AOC 731FW 2. LCD Monitor Description The LCD monitor will contain a main board, power board and a key 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: Operation Instruction

    17" LCD Color Monitor AOC 731FW 3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The control buttons are located in the front 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 731FW 3.3 Adjusting the Picture OSD Settings 1) Press the MENU-button to activate the OSD window. 2) Press- or + to navigate through the functions. Once the desired function is highlighted, press the MENU-button to activate sub-menu . Once the desired function is highlighted, press MENU-button to activate it.
  • Page 8 17" LCD Color Monitor AOC 731FW...
  • Page 9 17" LCD Color Monitor AOC 731FW LED Indicators Status LED Color Full Power Mode Green or Blue Active-off Mode Orange or red...
  • Page 10: Input/Output Specification

    17" LCD Color Monitor AOC 731FW 4. Input/Output Specification 4.1 Input Signal Connector Pin No. Description Pin No. Description Red Video Green Video Detect Cable Blue Video DDC-Serial Data Ground H-Sync Red Ground V-Sync Green Ground DDC-Serial Clock Blue Ground VGA connector layout 4.2 Factory Preset Display Modes...
  • Page 11: Panel Specification

    17" LCD Color Monitor AOC 731FW 4.3 Panel Specification CLAA170WA02 is 17” color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD panel, LVDS driver ICs, control circuit and backlight. By applying 6 bit digital data,1280×720, 262K-color images are displayed on the 17”...
  • Page 12 17" LCD Color Monitor AOC 731FW 4.3.2 Optical Characteristics Ta = 25° C, VCC=5.0V 4.3.3 Electrical Characteristics TFT LCD Module: Back Light Unit:...
  • Page 13: Block Diagram

    17" LCD Color Monitor AOC 731FW 5. Block Diagram 5.1 Software Flow Chat...
  • Page 14 17" LCD Color Monitor AOC 731FW 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

    17" LCD Color Monitor AOC 731FW 5.2 Electric Block Diagram 5.2.1 Main Board Crystal (14.318MHz) LCD interface (X401) (CN102) (U1) EEPROM Scalar TSUM1QFK-LF SST25LF020A (Include MCU, ADC, OSD) (U402) (U401) H sync (U1) V sync D-Sub EEPROM Connector M24C16 (CN401)
  • Page 16 17" LCD Color Monitor AOC 731FW 5.2.2 Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit: R904, R932, R933 CN902 Feedback Circuit Control IC ON/OFF Output Transformer MOSFET Circuit ON/OFF Lamp Control Feedback Circuit Control IC (IC801)...
  • Page 17: Schematic

    17" LCD Color Monitor AOC 731FW 6. Schematic 6.1 Main Board TSUM17AK SCHEMATIC SXGA RSDS OUTPUT GNDR GNDR GNDG GNDG GNDB GNDB HSY NC HSY NC VCC1.8 VCC3.3 VSY NC VSY NC DDCA_SDA DDCA_SDA DDCA_SCL DDCA_SCL INPUT_DET INPUT_DET DDC_WP DDC_WP VCC1.8...
  • Page 18 17" LCD Color Monitor AOC 731FW The type of R713 and R714 are 1206 SOT-223 VCC3.3 R707 VCC3.3 R701 U701 D701 CN701 1K 1/16W R702 BL_ADJ VCC3.3 47R 1/16W P W M SR24 C706 R703 4K7 1/16W 10uF/16V Adj_BACKLIGHT 4...
  • Page 19 17" LCD Color Monitor AOC 731FW RED+ FB401 R404 C404 0.047uF 0Ω 1/10W 56Ω 1% 1/16W RED- GREEN+ FB402 R406 C406 0.047uF 0Ω 1/10W 56Ω 1% 1/16W GREEN- BLUE+ FB403 R408 C408 0.047uF 0Ω 1/10W 56Ω 1% 1/16W BLUE- PC5V...
  • Page 20 17" LCD Color Monitor AOC 731FW VDVI VMPLL VPLL AVDD VDDP VDDC VCC3.3 FB407 VDDP VCC3.3 FB406 AVDD C440 VCC3.3 VDVI 120 OHM FB408 VCC3.3 C451 600 OHM C435 0.1uF/16V 10uF/16V 600 OHM C437 0.047uF C430 C431 C432 C433 C434 0.1uF/16V...
  • Page 21 17" LCD Color Monitor AOC 731FW CN102 PA[2..7] PA[2..7] RA3N FB0N RA1P RA3P FB0P RA1N RA2P RA2N FB1N RA2N RA2P FB1P RA3P RA3N RA1N FB2N RA1P FB2P PA[8..13] PA[8..13] GA3N FG0N GA1P GA3P FG0P GA1N PA10 GA2P GA2N FG1N PA11...
  • Page 22: Power Board

    17" LCD Color Monitor AOC 731FW 6.2 Power Board 715G2664-2 1/4W R918 F902 0R05 1/4W +12V 1/4W R919 L904 C912 1.1uH 0.001uF ZD902 1/4W R920 RLZ13B C917 C918 680uF/25V 680uF/25V C922 T901 R929 ZD901 1K 1/4W D906 SP10100 BD901 R904...
  • Page 23 17" LCD Color Monitor AOC 731FW C803 1000pF T801 D805 R817 R821 POWER X'FMR BAW56 10K 1/10W 1K 1/10W 1% CN801 CONN R812 1/4W F801 0 OHM 1/4W C819 0.01uF +12V C801 15pF/6KV R801 R806 C802 C824 R855 1K5 1/10W 1%...
  • Page 24: Pcb Layout

    17" LCD Color Monitor AOC 731FW 7. PCB Layout 7.1 Main Board...
  • Page 25 17" LCD Color Monitor AOC 731FW...
  • Page 26: Power Board

    17" LCD Color Monitor AOC 731FW 7.2 Power Board...
  • Page 27: Key Board

    17" LCD Color Monitor AOC 731FW 7.3 Key board...
  • Page 28: Maintainability

    17" LCD Color Monitor AOC 731FW 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 731FW 8.2 Trouble Shooting 8.2.1 Main Board 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 Reinsert or check the...
  • Page 30 17" LCD Color Monitor AOC 731FW No picture (LED orange) No picture The button if under X401 oscillate Replace X401 control waveform is normal Check Correspondent Check reset circuit of component U401 is normal Measure U701 PIN2=3.3V U702 PIN2 =1.8V...
  • Page 31 17" LCD Color Monitor AOC 731FW White screen White screen Measure Q704 base X401 oscillate waveform is normal is low level? Replace X401 Check Q703, Q704 is Check reset circuit of broken or CN102 solder? U401 is normal Check Correspondent Check Correspondent component.
  • Page 32 17" LCD Color Monitor AOC 731FW 8.2.2 Power/Inverter Board 1.) No power Check CN902 pin4, 5 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit...
  • Page 33 17" LCD Color Monitor AOC 731FW 2.) W / LED, No Backlight Check CN902 pin4, 5 = 12V Check adapter or MB Check ON/OFF signal Check Interface board Check IC801 PIN12=12V pin9=12vvoltage of C905(+) Change Q808, Q805 Check IC801 PIN10, 9 have the output of square wave at short time Change IC801 Check Q802 PIN5, 6, 7, 8 have the output of square wave at short time.
  • Page 34 17" LCD Color Monitor AOC 731FW 8.2.3 Key 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 35: White-Balance, Luminance Adjustment

    17" LCD Color Monitor AOC 731FW 9. White- Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. Before started adjust white balance , please set the Chroma-7120 MEM Channel 3 to Reddish (6500K) color, MEM Channel 4 to Default (7300K) color, MEM Channel 9 to Bluish (9300K) color , and MEM Channel 10 to sRGB color ( our Reddish color parameter is x = 313 ±...
  • Page 36 17" LCD Color Monitor AOC 731FW 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 factory window until chroma 7120 indicator reached the value B=100 7.
  • Page 37: Monitor Exploded View

    REAR COVER SCREW(BOARD/MAIN FRAME) BC COVER SCREW(PANEL) LOGO LOOP SCREW(HINGE/MAIN FRAME) STAND SCREW(BOARD/MAIN FRAME) BASE SCREW(HINGE/BASE) KEY PAD PANEL LENS KEY BOARD COVER STAND F POWER BOARD COVER STAND B MAIN BOARD GPM 731FW HINGE GPM 731FW EPS GPM 731FW MAINFRAME...
  • Page 38: Bom List

    FOOT Q33G0190AEP 1X COVER STAND F Q33G0191AEP 1X COVER STAND B Q34G0359AEP 1X STAND Q34G0360AEP 1X0133 BASE Q37G0072011 GPM 731fw hinge E750 750GLC70WA233N PANEL CLAA170WA02 002 FZ CPT E750 750GLC70WA242N PANEL CLAA170WA02 012 WJ CPT CBPC7CMBA1QQ MAIN BOARD G2575-2-X-X-2-080311 CN404...
  • Page 39 17" LCD Color Monitor AOC 731FW U403 056G1133 34 M24C02-WMN6TP U406 056G1133 56 M24C16-WMN6TP U402 056G1133 81 SST25LF020A-33-4C-SAE Q402 057G 417 12 T KEC 2N3904S-RTK/PS Q701 057G 417 12 T KEC 2N3904S-RTK/PS Q702 057G 417 12 T KEC 2N3904S-RTK/PS Q404...
  • Page 40 17" LCD Color Monitor AOC 731FW R444 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R445 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R449 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R451 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R457 061G0402103...
  • Page 41 17" LCD Color Monitor AOC 731FW C447 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C704 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C705 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C707 065G0402104 15 MLCC 0402 0.1UF K 16V X5R...
  • Page 42 17" LCD Color Monitor AOC 731FW C406 065G0402473 12 CHIP 0.047uF 16V X7R C407 065G0402473 12 CHIP 0.047uF 16V X7R C448 065G0603224 17 CAP:CER 0.22UF-20%-80% 16V FB407 071G 56K121 CHIP BEAD FB408 071G 56Z601 CHIP BEAD 600 OHM 0805 FB406...
  • Page 43 17" LCD Color Monitor AOC 731FW CN802 033G8020 2E F CONNECTOR CN801 033G8020 2E F CONNECTOR 051G 6 4503 GLUE_RTV IC903 056G 139 3A IC PC123Y22FZ0F NR901 061G 58080 WT 8 OHM NCT R908 061G152M104 64 100KOHM 5% 2W R914 061G152M278 64 0.27 OHM 5% 2W...
  • Page 44 17" LCD Color Monitor AOC 731FW Q90G0117 2 HEAT SINK IC801 056G 379 22 IC TL494IDR SOIC-16 IC901 056G 379 71 IC TEA1530AT/N2 so-8 nxp Q801 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q806 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q811 057G 417 4 PMBS3904/PHILIPS-SMT(04)
  • Page 45 17" LCD Color Monitor AOC 731FW R927 061G0603360 1F RST CHIPR 3.6K OHM +-1% 1/10W R813 061G0603360 1F RST CHIPR 3.6K OHM +-1% 1/10W R827 061G0603360 1F RST CHIPR 3.6K OHM +-1% 1/10W R820 061G0603470 2F RST CHIPR 47 KOHM +-1% 1/10W...
  • Page 46 17" LCD Color Monitor AOC 731FW R922 061G1206102 RST CHIPR 1k OHM +-5% 1/4W R921 061G1206102 RST CHIPR 1k OHM +-5% 1/4W R812 061G1206330 RST CHIPR 33 OHM +-5% 1/4W R855 061G1206330 RST CHIPR 33 OHM +-5% 1/4W R933 061G1206472 RST CHIPR 4.7K OHM +-5% 1/4W...
  • Page 47 BA159GPT DO-41 CHENMKO D900 093G1100 1152T DIODE PR1007R 1A/1000V DO-41 715G2664 2 POWER BOARD PCB L902 S73G17465VW LINE FILTER ASS'Y Q15G0294101 GPM 731fw mainframe Q33G0188AED 1L0100 key pad Q33G0189 1 1C LENS Q34G0355AEPA1X0130 BEZEL L17W-831 Q34G0356AEPA1X0100 rear cover Q34G0357AEP 1X...
  • Page 48 17" LCD Color Monitor AOC 731FW Q52G 1185 66 Big tape for aoc carton Q52G6020 69 AOC PROTECT FILM 041G780061513B INPUT NOT SUPPORT CARD Q41G7800615A93 warranty card for mexico Q41G780A61579A 713 fw qsg Q45G 76 28 C PE BAG FOR MANUAL...
  • Page 49: Differnent Parts List

    17" LCD Color Monitor AOC 731FW 12. Different Parts List Diversity of T77CMBNQW5A2NN compared with T77CMBNPW5A5NN Location Part No. Description E750 750GLC70WA232N PANEL CLAA170WA02 002 WJ CPT E750 750GLC70WA243N PANEL CLAA170WA02 012 FZ CPT Q40G 17N61592A RATING LABEL Q44G7088615 1A 17"LCD CARTON...
  • Page 50 705GQ834131 STAND/BASE ASS'Y KEPC7QF8 KEPC BOARD Q15G0294101CKD MAIN FRAME Q34G0360AEP 1X0100 BASE Q34G0355AEPA1X0100 BEZEL L17W-831 Q37G0072011CKD GPM 731FW HINGE 050G6001 1 RUBBER TIE 089G402A15NIS1 POWER CORD Q40G 17N61596A RATING LABEL Q41G7800615B55 SA SERVICE CENTER Q44G6000CKD 9A CARTON FOR CKD Q45G 76 28CK2...

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