AOC E941SA, E941VA service manual No Backlight of panel

Page 43

Service Manual

AOCe941series

No Backlight of panel

Check voltage of F801-12V？

NG

OK

Check ON/OFFsignal

NG

Check main board

OK

Check flow chart for the

Inverter No Backlight

Open F801, voltage-12V

NG

Return check Power

OK

After Power off,check

C801/C802？Q824?

Check IC801 -12pin=12V pinRT waveform?

NG

OK

After Power off,check Q805/Q808/R804/C825

Check IC801-6pin RT waveform?

NG

OK

Check IC801-out9/10pin-?

OK

Check Q802 waveform?

OK

Check T801 out voltage?

OK

Check feedback circuit

Check aroud component

Replace IC801

NG

Check around component

NG

Replace device

NG		Check /Replace
		C801-C803
		C801-C803

43

Image 43

Contents AOC e941VA /e941SA /e941S LCD 显示器维修手册Revision List Contents USB HUB LCD SpecificationsProduct Features TTLWxga Factory preset modesXGA SxgaControl Buttons Operation instructionDCR OSD Lock Function OSD User mode adjustment+5VDC VGA 15pin ConnectorDVI Connector Interface descriptionUSB+ Audio in port General Specifications Electrical Absolute Ratings Panel FeatureElectrical Characteristics AOCe941Series Optical Specifications LED ConnectorLCD Block Diagram Block DiagramMainBoard Block Diagram 1e941VA---715G3737 SET 2e941SA---715G3225EMI IC-PWM MOSSoftware Flow Chart Software Flow ChartMain Board 1---715G3737-M01 Circuit SchematicDetvga DVI-input/DDC Power part---5V/3.3V/1.8V Scarlar---Flash/key Output---LVDS connector Bladj Blon Main Board 2---715G3225-1-2R101 TO252 AOCe941Series VSC 715G2892-P02---adapter 12V/5V Power BoardConverter Board----715G3918-P02 Phonejack Audio part 715G2892 P02Key Board 715G4007-K01 Explore Views AOCe941Series AOCe941Series MainBoard 1- 715G3737-M01 PCB LayoutAOCe941series Main Board 2---715G3225-1-2 AOCe941series PowerBoard 715G2892-P02 KeyBoard ---715G4007 Maintainability Requirement Maintenance Trouble treatmentTrouble Shooting Main Board---No Power Check flow chart For the no powerFor the no signal Check flow chartCheck flow chart No Backlight of panel Key Board---OSD no working Writing DDC program step AOCe941series AOCe941series Model：e941VA--T995NTNBWVK2PNJ BOM ListAC Socket Screw AD91603YY1SMTJ Power Board for SMTChoke Coil Choke by LI TARST Chipr 10KOHM +-1% 1/10W Yageo IC FAN6752MY SOP-8RST Chipr MAX 0R05 1/10W Fenghua RST Chipr 1KOHM +-1% 1/10W YageoTRA KTD1028 KEC AD91603YY1AIJ Power Board for AIEyelet IC AS431AZTR-E1 TO-92PIN Header 2.54MM 2P Jumper WireRectifier Diode FR107 LNPCA9361XYY1J Convertor BoardRST Chipr 1 OHM +-5% 1/10W Yageo RST Chip 1K 1/10W 5% Tzai YuanRST Chipr 10K OHM +-5% 1/10W Fenghua RST Chip 100K 1/10W 5% Tzai YuanRST Mofr 4.7 OHM +-5% 2WS Futaba Connector 9PConn 6PIN WaferRST Chip 100R 1/16W 5% Tzai Yuan RST Chipr 10 OHM +-5% 1/16W FenghuaRST Chip 10R 1/16W 5% Tzai Yuan RST Chipr 100 OHM +-5% 1/16W FenghuaRST Chip 10K 1/16W 5% Tzai Yuan RST Chipr 1KOHM +-5% 1/16W FenghuaRST Chip 1K 1/16W 5% Tzai Yuan RST Chipr 10KOHM +-5% 1/16W FenghuaRST Chipr 4.7KOHM +-5% 1/16W Fenghua Tzai YuanRST Chipr 470 OHM 5% 1/16W Fenghua RST Chip 470R 1/16W 5% Tzai YuanAOCe941series Chip Bead CAP Chip 4U7 10V X7RRLZ 5.6B Llds Dome Switch 5 PCS SMTKEPCAJA9Diode LBAV70LT1G SOT-23 LRC RLZ5.6BModel：e941SA--T995NSNCWVA1UNJ CBPC9NWA1QHJ Screw M3X6RST Chipr 1KOHM +-1% 1/8W Yageo RST Chipr 15KOHM +-1% 1/10W YageoCN901 006G R906 061G152M10452T XZ RST Chipr SMTC9NWA1QHJ Main Board for SMT SUB 15PINSOC Subd H 15P F SUB 15PIN Vertical Conn with ScrewRST Chipr 0 OHM +-5% 1/16W Yageo RST Chip 390R 1/16W 5% Fenghua RST Chipr 1KOHM +-5% 1/16W YageoRST Chipr 10KOHM +-5% 1/16W Yageo RST Chip 330R 1/16W 5% FenghuaRST Chipr 75OHM +-5% 1/16W Yageo RST Chipr 56KOHM 1/16W FenghuaRST Chipr 56KOHM 1/16W Tzai Yuan RST Chipr 75 OHM +-5% 1/16W FenghuaAOCe941series BAV70 SOT23 by PAN JIT X7RX5R OHM BeadJ44G9909101 Eps J44G9909201 J44G9909615 4A Model：e941S-- T9A2NS2DWVA4QNE AC Socket ST-01CP-BCE-R ADA1603HD1SMT Power Board for SMT LNPCA9401XHD1Main BOARD-CBPCANSA1H1 SMTCA-U402 PC123Y22FZOF SharpRST Chipr 1MOHM +-5% 1/4W Tzai Yuan ADA1603HD1AI Power Board for AIRST Chipr 10 Kohm +-1% 1/10W Fenghua RST Chipr MAXNO-SUGGEST RST Chipr 10KOHM +-5% 1/16W Y NO-SUGGEST RST Chipr MAX 0R05 OHM 1/16WNO-SUGGEST RST Chipr 100 OHM +-5% 1/16W NO-SUGGEST RST Chipr 1KOHM +-5% 1/16W YANO-SUGGEST RST Chipr 75OHM +-5% 1/16W YA NO-SUGGEST RST Chipr 330 OHM +-5% 1/16WKEY Board PCB Chip Bead 120OHM 6A MGLB2012-120T-LFMain Board PCB LED GPTD1210YGC3-HBRST Chip 120K 1/10W 5% Tzai Yuan Adapter Board PCBAC/DC Converter TA9690GN-A1-0-TR SOP-24 RST Chip 1R 1/10W 5% Tzai YuanSchottky B3100B 3A 100V SMB CAP ChipConverter Board PCB

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