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26 LCD TV
Service
Service
Service
Description
Table of Contents............................................................1
Important Safety Notice...................................................2
Revision List.........................................................3
1. General Specification..................................................4
2. Operating Instructions............................................5
2.1 The Use of Remote Control...................................5
2.2 To Use the Menu.................................................6
2.3 How to Connect..................................................9
2.4 Front Panel Control Knobs..................................12
3. Input/Output Specification.......................................13
4. Mechanical Instructions.........................................15
5. Repair Flow Chart ..............................................19
6. PCB Layout .......................................................24
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
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
TABLE OF CONTENTS
SAFETY NOTICE
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
Page
Description
6.1 Main Board....................................................24
6.2 Power Board..................................................26
6.3 Key Board.....................................................27
6.4 IR Board.......................................................28
7. Adjustment.......................................................29
8. Block Diagram........................................................30
9. Schematic Diagram..........................................32
9.1 Main Board....................................................32
9.2 Power Board..................................................42
9.3 Key Board.....................................................43
9.4 IR Board........................................................44
10. Exploded View..............................................45
11. BOM List......................................................46
1
AOC L26W831A
Horizontal Frequency
31.5~60 KHz
Page
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Summary of Contents for AOC L26W831A
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Page 1: Table Of Contents
26 LCD TV AOC L26W831A Service Service Service Horizontal Frequency 31.5~60 KHz TABLE OF CONTENTS Description Page Description Page Table of Contents..……........…..1 6.1 Main Board…………..……………...…….……..24 Important Safety Notice........……..2 6.2 Power Board……..……………….…….………..26 Revision List…………………………………………………3 6.3 Key Board………………………..……..………..27 1. General Specification......……...…..4 6.4 IR Board………………………….……..………..28 2. -
Page 2: Important Safety Notice
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 3: Revision List
Revision List Version Release Date Revision Instructions TPV Model Nov.-18-2009 Initial Release E269MANSW8B56N... -
Page 4: General Specification
1. General Specification... -
Page 5: Operating Instructions
2. Operating Instructions 2.1 The Use of Remote Control... -
Page 6: To Use The Menu
2.2 To Use the Menus... -
Page 9: How To Connect
2.3 How to Connect... -
Page 12: Front Panel Control Knobs
2.4 Front Panel Control Knobs... -
Page 13: Input/Output Specification
3. Input/Output Specification 3.1 RGB Signal Input 15 - Pin Color Display Signal Cable Pin No. Description Pin No. Description Red Video No Pin Green Video Sync Ground Blue Video Serial Data for DDC Ground H-Sync. Red Ground V-Sync. Green Ground Serial Clock for DDC Blue Ground 3.2 HDMI Digital Connector Pin Assignments... - Page 14 3.3 AV/S-Video/Component Video Inputs AV (Composite Video Input) Video1 System NTSC/PAL Amplitude 1.0Vpp (including sync) Impedance 75 ohm terminated S-Video (Y / C Input) S-Video2 System NTSC/PAL/SECAM Y signal amplitude 1.0Vpp (including sync) C signal amplitude 0.286Vpp Impedance 75 ohm terminated Component (Y, Pb/Cb, Pr/Cr Input) Video3 480 I (SDTV)
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Page 15: Mechanical Instructions
4. Mechanical Instructions 1. Remove the screws to remove the stand base and rear cover. 2. Release connectors. - Page 16 3. Remove the screws to remove speaker. 4. Remove the screws to remove main board and power board. 5. Remove the screws to separate panel and bezel.
- Page 17 6. Remove the screws to remove bracket and key board. 7. Remove panel.
- Page 18 8. Remove IR board.
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Page 19: Repair Flow Chart
5. Repair Flow Chart 1. No Power (No LED Indicator) Plug in power cord and interface Check power cord and board interface Replace F901 or BD901 or C920 Check F901, BD901, C920 Check D930, D931 Replace D930 or D931 Replace T901 Check T901 Check D950, C952, C954 Replace D950 or C952 or C954... - Page 20 3. No Display (LED Indicator Green) Check 12V Check PS Check power Check back light is OK power supply signal board Check BL-ON/OFF signal Check LVDS cable and connector Replace U405 Check U405 Replace Q710, Q711 Check Q710, Q711 Check Panel Replace Panel...
- Page 21 4. Abnormal Display Check the source Reset source Check signal filter circuit Replace the filter or inductance Check input signal TV signal Check TV system setup Replace TU201 Check TU201 AV, S-video, Comp, PC, HDMI signal Replace U405 Check U405 Replace LVDS cable Check LVDS cable Replace panel...
- Page 22 5. No Sound Reset source Check the source Check signal filter circuit Replace the filter or inductance Replace the Earphone jack Check Earphone jack Check input signal SIF signal Check TV system setup Replace TU201 Check TU201 Replace U405 Check U405 Replace U603, U604 Check U603, U604 Replace speaker...
- Page 23 6. Key Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Is Button Switch normally? Replace Button Switch Replace Key Pad Board Is Key Pad Board Normally? Check Main Board...
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Page 24: Pcb Layout
6. PCB Layout 6.1 Main Board 715G3365M1B000004K... -
Page 26: Power Board
6.2 Power Board 715T2907 3... -
Page 27: Key Board
6.3 Key Board 715G3513K01000001S... -
Page 28: Ir Board
6.4 IR Board 715T3100 1... -
Page 29: Adjustment
7. Adjustment It’s no need to adjust the white balance for this model. 1. Enter into the factory mode: Turn on the TV, press MENU key with remote control, then press number key 1 9. It will achieve the factory mode. 2. - Page 41 1 2 3 4...
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Page 46: Bom List
11. BOM List Note: The parts information listed below are for reference only, and are subject to change without notice. Please go to http://cs.tpv.com.cn/hello1.asp for the latest information. E269MANSW8B56N Location Part No. Description Remark 040G 581689 4A BARCODE LABEL FOR 1 045G 77500 BARCODE RIBBON 045G 77501... -
Page 47: Power Board
Q15T0257101CKD 26BKT-VESA-BTM Q36T 600 31 2 NONWOVEN FABRIC Q36T 600 35 19 GP NONWOVEN FABRIC Q36T 600 40 1 NONWOVEN FABRIC 705TQ934E87 STAND ASS”Y 26” 0Q1G 130 6120 SCREW (T3X6) A34T0560 GM 1L0100 STAND A34T0561 GM 1L0100 BASE_S1 M03701 A37T0065012CKD HINGE ASS'Y AM1G1740 10125 SCREW... - Page 48 C902 065T306K6812BP Y1 680PF M 250VAC C903 065T306K6812BP Y1 680PF M 250VAC C952 067G204V331 3K CS CAP 330UF 16V 10*12 MM C974 067G215A1026KV EC 1000UF 35V 12.5*25MM C973 067G215A1026KV EC 1000UF 35V 12.5*25MM C999 067G215A4714KV EC 470UF 25V 10*16MM C975 067G215A4716KV EC 470UF 35V M 10*16MM C991...
- Page 49 Q924 057G 760 5 DTC144WKA BY ROHM SMT Q921 057G 761 11 TRA KTD1624C RTF/P 60V/3A SOT-89 Q925 057G 761 12 TRA KTB1124B SOT-89 KEC R956 061G0603000 RST CHIP MAX 0R05 1/10W R945 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W R957 061G0603100 2F RST CHIPR 10K OHM +-1% 1/10W...
- Page 50 R934 061G1206220 RST CHIPR 22 OHM +-5% 1/4W R901 061G1206334 RST CHIPR 330KOHM +-5% 1/4W R903 061G1206334 RST CHIPR 330KOHM +-5% 1/4W R902 061G1206334 RST CHIPR 330KOHM +-5% 1/4W R950 061G1206470 RST CHIPR 47 OHM +-5% 1/4W R952 061G1206470 RST CHIPR 47 OHM +-5% 1/4W R954 061G1206470 RST CHIPR 47 OHM +-5% 1/4W...
- Page 51 CN901 006G 31501 EYELET IC971 056G 158 10 T IC AS431AZTR-E1 TO-92 IC952 056G 158 10 T IC AS431AZTR-E1 TO-92 R940 061G152M10452T RST MOFR 100KOHM +-5% 2WS R946 061G152M27852T RST MOFR 0.27 OHM +-5% 2WS R970 061G152M33952T RST MOFR 3.3 OHM +-5% 2WS R974 061G175L10252T 1KOHM +-5% 1/2W...
- Page 52 071FPG25101 00 MAGNETIC CORE DMR40 EPC25 040G 45762412B CBPC LABEL CN603 033G3802 4B Y WAFER CN402 033G3802 8B Y CONNECTOR CN701 033G380212B Y WAFER CN404 033G8027 30 WAFER 30P 2.0MM DIP DUAL ROW R203 061G 208470 64 RST MOFR 47OHM +-5% 1W R205 061G 208470 64 RST MOFR 47OHM +-5% 1W...
- Page 53 U402 056G1133923 IC MX25L4005AM2C-12G SOP-8 U405 056T 562581 IC HX6201-A06MLAG QFP-176 U604 056T 616516 IC APA2176AQBITRL TQFN3X3-16 Q410 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q411 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q703 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q412 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q710 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q711 057G 417 4...
- Page 54 R729 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R727 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R720 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R713 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R712 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R306 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W...
- Page 55 R132 061G0603000 RST CHIP MAX 0R05 1/10W R135 061G0603000 RST CHIP MAX 0R05 1/10W R204 061G0603000 RST CHIP MAX 0R05 1/10W R606 061G0603000 RST CHIP MAX 0R05 1/10W R608 061G0603000 RST CHIP MAX 0R05 1/10W R702 061G0603000 RST CHIP MAX 0R05 1/10W R613 061G0603000 RST CHIP MAX 0R05 1/10W...
- Page 56 R639 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R638 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R637 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R636 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R635 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R466 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W...
- Page 57 R110 061G0603750 RST CHIPR 75 OHM +-5% 1/10W R114 061G0603750 RST CHIPR 75 OHM +-5% 1/10W R122 061G0603750 RST CHIPR 75 OHM +-5% 1/10W R126 061G0603750 RST CHIPR 75 OHM +-5% 1/10W R145 061G0603750 RST CHIPR 75 OHM +-5% 1/10W R628 061G0603753 RST CHIPR 75 KOHM +-5% 1/10W...
- Page 58 C454 065G0603104 32 CHIP 0.1UF 50V X7R C455 065G0603104 32 CHIP 0.1UF 50V X7R C456 065G0603104 32 CHIP 0.1UF 50V X7R C458 065G0603104 32 CHIP 0.1UF 50V X7R C462 065G0603104 32 CHIP 0.1UF 50V X7R C464 065G0603104 32 CHIP 0.1UF 50V X7R C466 065G0603104 32 CHIP 0.1UF 50V X7R...
- Page 59 C202 065G0603104 32 CHIP 0.1UF 50V X7R C205 065G0603104 32 CHIP 0.1UF 50V X7R C206 065G0603104 32 CHIP 0.1UF 50V X7R C318 065G0603104 32 CHIP 0.1UF 50V X7R C317 065G0603104 32 CHIP 0.1UF 50V X7R C314 065G0603104 32 CHIP 0.1UF 50V X7R C313 065G0603104 32 CHIP 0.1UF 50V X7R...
- Page 60 C622 065G0805106 15 CAP CHIP 0805 10UF K 16V X5R C637 065G0805106 15 CAP CHIP 0805 10UF K 16V X5R C649 065G0805106 15 CAP CHIP 0805 10UF K 16V X5R C425 065G0805106 15 CAP CHIP 0805 10UF K 16V X5R C423 065G0805106 15 CAP CHIP 0805 10UF K 16V X5R...
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Page 61: Key Board
Q36T 600 31 2 NONWOVEN FABRIC Q40G 26061532A RATING LABEL Q40G1000615 2B SIDE LABEL Q41T7800615A92 WARRANTY CARD Q44GE01461519A 26 TV AOC CARTON Q44TE014101 EPS-FOR BBY Q44TE014201 EPS-FOR BBY Q44TE014301 EPS-FOR BBY Q45G 76 28NV2 PE BAG FOR CLAMP Q45G 77 5... - Page 62 Q50T 500523 CABLE TIE Q55G 100620500 TIN STICK(SN-0.5AG) Q45G 99606 24 ESD INSULATING PE BAG...