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LM923 Datasheet Preview

LM923 Datasheet

LCD Monitor Service Manual

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LM923 pdf
AOC LM923
SERVICE MANUAL
19” LCD MONITOR
LM923
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS
BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF
THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES,
ERRORS OR OMISSIONS.
Page 1 of 55



ETC
ETC

LM923 Datasheet Preview

LM923 Datasheet

LCD Monitor Service Manual

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LM923 pdf
AOC LM923
Table of Content
Revision List…………………………………………………………………………………………………………. 3
1. Monitor Specifications………………………………………………………………………………………….. 4
2. LCD Monitor Description……………………………………………………………………………………….. 5
3. Operating Instructions………………………………………………………………………………………….. 6
3.1 General Instructions…………………………………………………………………………………………... 6
3.2 Control Buttons………………………………………………………………………………………………... 6
3.3 Adjusting the Picture………………………………………………………………………………………….. 7
4. Input/Output Specification……………………………………………………………………………………... 9
4.1 Input Signal Connector……………………………………………………………………………………….. 9
4.2 Factory Preset Display Modes……………………………………………………………………………….. 10
4.3 Power Supply Requirements………………………………………………………………………………… 10
4.4 Panel Specification………………………………………………………………………………………….… 11
4.4.1Display Characteristics………………………………………………………………………………… 11
4.4.2Optical Characteristics…………………………………………………………………………………… 11
4.4.3 Parameter Guide Line For CCFL Inverter……………………………………………………………… 12
5. Block Diagram………………………………………………………………………………………………….… 13
5.1 Monitor Exploded View……………………………………………………………………………………….. 13
5.2 Software Flow Chart…………………………………………………………………………………………... 14
5.3 Electrical Block Diagram……………………………………………………………………………………… 16
5.3.1 Main Board………………………………………………………………………………………………... 16
5.3.2 Inverter/Power Board………………………………………………………….…………………………. 17
6. Schematic……………………………………………………………………………………………………….… 18
6.1 Main Board…………………………………………………………………………………………………….. 18
6.2 Audio Board……………………………………………………………………….………………………….. 24
6.3 Power Board……………………………………………………………………….………………………….. 25
7. PCB Layout………………………………………………………………………………………………………. 28
7.1 Main Board…………………………………………………………………………………………………….. 28
7.2 Audio Board…………………………………………………………….……………………………………… 29
7.3 Power Board………………………………………………………………………….……………………….. 30
7.4 Key Board……………………………………………………………………………………………………… 30
8. Maintainability……………………………………………………………………………………………………. 31
8.1 Equipments and Tools Requirement………………………………………………………………………… 31
8.2 Trouble Shooting…………………………………………………………………………………………….… 32
8.2.1 Main Board………………………………………………………………………………………………... 32
8.2.2 Power /Inverter/Board……………………………………………………………………………………. 35
8.2.3 Keypad Board…………………………………………………………………………………………….. 37
9. White-Balance, Luminance adjustment………………………………………………………………….… 38
10. EDID Content……………………………………………………………………………………………………. 39
11. BOM List………………………………………………………………………………………………………... 40
Page 2 of 55


Part Number LM923
Description LCD Monitor Service Manual
Maker ETC
Total Page 30 Pages
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