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AOC LM540
SERVICE MANUAL
15" LCD Monitor
LM540
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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 RE LIABILITY
FOR CHANGES, ERRORS OR OMISSIONS.
MANUFACTURE DATE: Sep-15-2005
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AOC LM540
REVISION DATE MODIFIACTION
A00 Sep-15-2005 Initial release
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AOC LM540
TABLE OF CONTENTS
Revision List ---------------------------------------------------------------------------------- 02
Table of Contents ---------------------------------------------------------------------------------------- 03
1. Monitor Specifications --------------------------------------------------------------------------------04
2.LCD Monitor Description -----------------------------------------------------------------------05
3.Operation Instructions --------------------------------------------------------------------------06
3.1 General Instructions -----------------------------------------------------------------------06
3.2 Control Button ------------------------------------------------------------------------------06
3.3 Adjusting The Picture ---------------------------------------------------------------------0708
4 . I n p u t / O u t p u t Sp e c i f i c a t i o n ------------------------------------------------------------------- 09
4.1 Input Signal Connector -------------------------------------------------------------------09
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4.2 Factory Preset Display Modes ----------------------------------------------------------10
4.3 Power Supply Requirements ------------------------------------------------------------10
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5 . P a n e l Sp e c i f i c a t i o n - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11
5.1 General Feature - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11
5.2 Optical Characteristics --------------------------------------------------------------------12
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6. Block Diagram -----------------------------------------------------------------------------------13
6.1 Software Flow C hart -----------------------------------------------------------------------131 4
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6.2 Electrical Block Diagram -----------------------------------------------------------------15 16
7. Schematic -----------------------------------------------------------------------------------------17
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7.1 Main Board ---------------------------------------------------------------------------------1721
7.2 Power Board -------------------------------------------------------------------------2223
8. PCB Layout ---------------------------------------------------------------------------------------24
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8.1 Main Board ----------------------------------------------------------------------------------24
8.2 Power Board --------------------------------------------------------------------------------25
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8.3 KEY Board ------------------------------------------------------------------------------ 25
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9 . M a i n ta i n a b i l i t y -----------------------------------------------------------------------------------26
9 . 1 E q u i p m e n t s a n d To o l s R e q u i r e m e n t s -------------------------------------------------26
9.2 Trouble Shooting ---------------------------------------------------------------------------27 32
10. White-Balance, Luminance Adjustment ----------------------------------------------- 33
11. Check List after replacing LCD Main board----------------------------------------------- 34 36
12. EDID Content ---------------------------------------------------------------37
13. BOM List ----------------------------------------------------------------------------------3851
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AOC LM540
1. MONITOR SPECIFICATIONS
Driving system TFT LCD
Size 38cm(15.0")
Type HSD150SX84-CHSD
Pixel pitch 0.297mm(H) x 0.297mm(V)
Viewing angle 130(H) 100(V) (R>10)
LCD Panel
Luminance 250cd/ m2
Contrast Ratio 400:1
Response time 35ms (typ)
Display colors 6-bits driver
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R G B Analog 0.7Vp-p
H/V separate TTL level
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H/V composite TTL level
Input signals
Horizontal frequency 30kHz