21.5" LCD Monitor Envision P2271WL
1
Service
Service
Service
Horizontal Frequency
31-80 KHz
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 Button…………….…..............……...............6
3.3.OSD Menu…………….…...........................…...........7
4.Input/Output Specification............……………............11
4.1.Input Signal Connector............………….................11
4.2.Factory Preset Display Modes…….........................12
4.3.Panel Specification.....………...…………................13
5.Block Diagram…….....................………….................16
5.1.Main Board…….…………...………………....….......16
5.2.Power Board……………..….…………...….......17
6.Schematic……………........................................18
6.1.Main Board………...........................................18
6.2.Adapter Board...……......................................22
6.3.Converter Board...……...................................23
6.4.Key Board...…….............................................25
7.PCB Layout..………….......................................26
7.1.Main Board………...........................................26
7.2.Adapter Board……......................................29
7.3.Converter Board….....................................32
7.4.Key Board…………….....................................33
8.Maintainability……….........................................34
8.1.Equipments and Tools Requirement...............34
8.2.Trouble Shooting…………..............................35
9.White-Balance, Luminance Adjustment.............39
10.Monitor Exploded View………..…….…...........41
11.BOM List…………………………………............43
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
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