Service manual

21.5" LCD Monitor AOC e2237Fwh
1
Service
Service
Service
Horizontal Frequency
30- 83kHz
Table of Contents
Description Page Description Page
SAFETY NOTICE
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.
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 Buttons and Connections...............................6
3.3.OSD Menu…..............................................................8
4.Input/Output Specification...............……………….......19
4.1.Input Signal Connector...............………..................19
4.2.Factory Preset Display Modes……..........................21
4.3.Panel Specification…………..………………………..22
5.Block Diagram….........................................................24
5.1.Main Board…..….............................................24
5.2.Power Board…………..…………………………......25
6.Schematic…………..….........................................27
6.1.Main Board..…….…...........................................27
6.2.Power Board..……….........................................33
6.3.Light Sensor Borad……………………………….36
6.4.LED Board……..………..………………………37
6.5.Key Board…............……....................................38
7.PCB Layout..………..............................................39
7.1.Main Board………..…........................................39
7.2.Power Board….…..............................................40
7.3.Light Sensor Borad…………………………….43
7.4.LED Board……..………..………………………43
7.5.Key Board………..…..........................................44
8.Maintainability………............................................45
8.1.Equipments and Tools Requirement…...............45
8.2.Trouble Shooting…..………...............................46
9.Firmware and DDC Instruction……………….….50
10.White-Balance,Luminance Adjustment…............65
11.Monitor Exploded View……................................67
12.BOM List…………..……………………….............69
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING