21.5" LCD Monitor                                                                                       AOC e2250Swda 
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. 
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING 
 
R FOR TH 
 
  UNIT WHEN S 
 
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  Setting…..........................................................8 
4.Input/Output Specification...............……………….......18 
4.1.Input  Signal  Connector...............………..................18 
4.2.Preset  Display  Modes……..........................19 
4.3.Panel Specification…………..………………………..20 
5.Block  Diagram….........................................................23 
5.1.Main  Board…..….............................................23 
5.2.Power  Board…………..…………………………......24 
6.Schematic…………..….........................................25 
6.1.Main Board..…….…...........................................25 
6.2.Power  Board..……….........................................30 
7.PCB  Layout..………..............................................32 
7.1.Main  Board………..…........................................32 
7.2.Power  Board….…..............................................34 
7.3.Key Board………..…..........................................35 
8.Maintainability………............................................36 
8.1.Equipments and Tools Requirement…...............36 
8.2.Trouble  Shooting…..………...............................37 
9.White-Balance,Luminance Adjustment…..............41 
10.Monitor Exploded View……................................43 
11.BOM List…………..……………………….............44