AOC Envision LE19W037, Service Manual

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18.5 18.5
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&21.5 &21.5
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&23.6 &23.6
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LCD LCD TV TV AOC AOC LE19W037&LE22(24) LE19W037&LE22(24)H037 H037
1 1
Service Service
Service
Service
Service Service
Horizontal Frequency Horizontal Frequency
31~60 KHz 31~60 KHz
TABLE OF CONTENTS TABLE OF CONTENTS
Description Description Page Page Description Description Page Page
SAFETY NOTICE SAFETY NOTICE
ANY PER ANY PERSON SON A ATTEMPTIN TTEMPTING TO SE G TO SERVICE RVICE THIS CHASS THIS CHASSIS MUST F IS MUST FAMILIARIZE H AMILIARIZE HIMSELF WITH IMSELF WITH THE CHASS THE CHASSIS IS
AND BE AND BE AW AWARE OF TH ARE OF THE NECESS E NECESSARY S ARY SAFETY PR AFETY PRECAUTIONS ECAUTIONS TO BE US TO BE USED WHEN S ED WHEN SERVICING ERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
6.2 Power Board………………..…….…….………......34 6.2 Power Board………………..…….…….………......34
6.3 LED Board……...…………..…….…….………......44 6.3 LED Board……...…………..…….…….………......44
6.4 Key 6.4 Key Board……………… Board………………………..……..……….......45 ………..……..……….......45
6.5 IR 6.5 IR Board……………… Board………………………….……..……….......45 ………….……..……….......45
7. Adjustment……..………………………….................46 7. Adjustment……..………………………….................46
8. Block Diagram.……...............................................47 8. Block Diagram.……...............................................47
9. 9. Schematic Diagram…..…………....………… Schematic Diagram…..…………....………………...49 ……...49
9.1 Main Board…………………………………...…......49 9.1 Main Board…………………………………...…......49
9.2 Power Board…………..….….……...………….......58 9.2 Power Board…………..….….……...………….......58
9.3 LED 9.3 LED Board………….……..….… Board………….……..….……...………….......66 …...………….......66
9.4 Key 9.4 Key Board……………… Board……………….……….…………….........68 .……….…………….........68
9.5 IR 9.5 IR Board……...………….…… Board……...………….……….…………….........69 ….…………….........69
10. Exploded View……………………………….…....70 10. Exploded View……………………………….…....70
11. BOM List……..……….………………….…………..74 11. BOM List……..……….………………….…………..74
Table of Contents.......……....................................….......1 Table of Contents.......……....................................….......1
Important Safety Notice.......................................…….....2 Important Safety Notice.......................................…….....2
Revision Revision List………………… List……………………………………… ……………………………....3 ………....3
1. 1. General General Spe Specification..............................……...….......5 cification..............................……...….......5
2. 2. Operating Instructions………………...…….… Operating Instructions………………...…….……….......6 …….......6
2.1 The Use 2.1 The Use of Remote Control…….…..……….…….......6 of Remote Control…….…..……….…….......6
2.2 To Use the 2.2 To Use the Menus….....……………… Menus….....………………….…..…….......7 ….…..…….......7
2.3 How 2.3 How to Connect……..……………….…….…… to Connect……..……………….…….……….....17 ….....17
2.4 Front Panel Control 2.4 Front Panel Control Knobs…….………… Knobs…….………….……….....19 .……….....19
3. Input/Output Specification…………....................…....20 3. Input/Output Specification…………....................…....20
4. Mechanical I 4. Mechanical I nstructions………… nstructions…………………….................22 ………….................22
5. Repair Flow Chart 5. Repair Flow Chart ……………………… ……………………….…….…….....25 .…….…….....25
6. PCB 6. PCB Layout ………………..…………………....….......32 Layout ………………..…………………....….......32
6.1 6.1 Main Board…………..………………...…….… Main Board…………..………………...…….…….......32 ….......32