Acer V551 Service Manual page 31

Acer V551 (new) CRT Monitor Service Guide
Table of Contents
1. Defection CKT............................................................................................................................. 2
(1) Circuit Diagram of Defection ............................................................................................. 2
(2) Autosync Deflection Controller--TDA4857....................................................................... 3
(3) X-ray protection & AFC(Auto Frequency Control) ........................................................... 3
(4) H-size control circuit .......................................................................................................... 4
(5) Horizontal output circuit..................................................................................................... 5
(6) H-Linear correction circuit ................................................................................................. 6
(7) Step-up CKT....................................................................................................................... 7
(8) Vertical output .................................................................................................................... 8
2. Video CKT................................................................................................................................... 9
(1) Black Diagram of Video..................................................................................................... 9
(2) MM1375XD Block Diagram.............................................................................................. 9
(3) Preamp CKT ....................................................................................................................... 10
(4) Cascode CKT...................................................................................................................... 11
(5) DC Restore CKT ................................................................................................................ 12
(6) ABL CKT: (Auto Brightness Limit)................................................................................ 13
(7) Brightness, V-blank, change mode blank, spot killer CKT ................................................ 14
ACER V551 MICROCONTROLLER CIRCUIT OPERATION THEORY ................................... 15
1. Introduction .......................................................................................................................... 15
2. Block diagram ...................................................................................................................... 15
3. MCU..................................................................................................................................... 15
4. How to detect mode timing .................................................................................................. 16
(1) Vertical sync frequency measurement .................................................................... 16
(2) Horizontal sync frequency measurement ................................................................ 16
5. What are the valid key functions for user............................................................................. 16
6. How to execute the auto alignment function........................................................................ 16
ACER V551 POWER SUPPLY CIRCUIT OPERATION THEORY............................................. 17
(1) Brief : .................................................................................................................................. 17
(2) Circuit Analysis .................................................................................................................. 17
Attachment A ................................................................................................................................... 20
Chapter 2 Circuit Operation Theory
Confidence and Property
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