HP LE1851w Service Manual

18.5" LCD Color Monitor
Service
Service
Service
Description
Table Of Contents......................................................1
Revision List........................................................2
1. Monitor Specification...............................................3
2. LCD Monitor Description........................................4
3. Operation Instruction...........................................5
3.1. General Instructions.........................................5
3.2. Control Button......................................................5
3.3 Adjusting the Picture....................................... ..6
4. Input/Output Specification......................................10
4.1. Input Signal Connector........................................10
4.2. Factory Preset Display Modes...........................10
5. Panel Specification.........................................11
5.1. General Feature...............................................11
5.2. Optical Characteristics....................................11
5.3 Parameter guide line for CCFL Inverter.................13
6. Block Diagram.....................................................15
6.1 Software Flow Chart.......................................15
6.2.Electrical Block Diagram...........................17
7. Schematic.....................................................19
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
7.1 Main Board....................................................19
7.2 Power Board...............................................24
7.3 Key Board..................................................26
8.PCB Layout.......................................... ........ ..... ...27
8.1. Main Board.................................................27
8.2. Power Board..........................................28
8.3. Key Board...............................................30
9. Maintainability................................................31
9.1. Equipments and Tools Requirement..............31
9.2. Trouble Shooting......................................32
9.2.1 Main Board..........................................32
9.2.2 Power Board.......................................34
9.2.3 Key Board..........................................36
10 White-Balance, Luminance adjustment...37
11.Mechanical Instructions.................................39
12. Monitor Exploded View.....................................42
13. BOM List.....................................................43
14. Different Parts List...............................................53
SAFETY NOTICE
1
HP LE1851w
Horizontal Frequency
24- 83 kHz
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