Optima L903AD+ Service Manual

19" LCD Color Monitor
Service
Service
Service
Description
Table Of Contents..........................................................1
Revision List.............................................................2
Important Safety Notice.................................................3
1.Monitor Specification...............................................4
2.LCD Monitor Description.........................................5
3.Operation Instruction...............................................6
3.1.General Instructions.................................................6
3.2.Control Button......................................................6
3.3.Adjusting the Picture..................................................8
4.Input/Output Specification.......................................10
4.1.Input Signal Connector..........................................10
4.2 Power Supply Requirement................................11
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4.3.Factory Preset Display Modes.................................11
4.4.Panel Specification...............................................12
5.Block Diagram.........................................................15
5.1.Software Flow Chart...........................................15
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
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

TABLE OF CONTENTS

Page Description
5.2 Electrical Block Diagram...................................17
6.Schematic...........................................................19
6.1.Main Board............................................................19
6.2 Power Board........................................................24
6.3. Audio Board.......................................................28
7.PCB Layout...........................................................29
7.1.Main Board.......................................................29
7.2 Power Board.......................................................32
7.3. Audio Board.......................................................34
7.4.Key Board..........................................................37
8.Maintainability........................................................38
8.1.Equipments and Tools Requirement......................38
8.2.Trouble Shooting................................................39
9.White-Balance,Luminance adjustment..................45
10.Monitor Exploded View.....................................46
11.BOM List................................................................47
SAFETY NOTICE
1
Optima L903AD+
Horizontal Frequency
30-83 kHz
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