KDL-20B4030, KDL-23B4030, KDL-26B4030 - Sony TV Service Manual (repair manual). Page 3

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SE2
RM-ED009
TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
1. GENERAL ...................................................................
3
Caution ................................................................
3
Specifications ......................................................
4
Connectors ..........................................................
5
Self Diagnosis .....................................................
7
2. DISASSEMBLY
2-1.
Rear Cover Removal (20 & 23 inches) ...............
8
2-2.
Rear Cover Removal (26 inches) ........................
8
2-3.
Loudspeaker Removal (20 & 23 inches) ............
9
2-4.
Loudspeaker Removal (26 inches) .....................
9
2-5.
B1 Board Removal ..............................................
10
2-6.
GS1/GS2/GS5 Board Removal ..........................
10
2-7.
H Board Removal ...............................................
11
2-8.
LCD Panel Removal (20 inches) ........................
11
2-9.
LCD Panel Removal (23 inches) ........................
12
2-10. LCD Panel Removal (26 inches) ........................
13
3. CIRCUIT ADJUSTMENTS
3-1.
Electrical Adjustments .......................................
14
3-2.
TT Mode  ............................................................
16
3-3.
TT OSD Labels  ..................................................
17
4. DIAGRAMS
4-1.
Block Diagram ....................................................
18
4-2.
Circuit Board Location ........................................
19
4-3.
Schematic Diagrams and Printed Wiring
Boards .................................................................
19
B1 Board Schematic Diagram .............................
20
GS1 Board Schematic Diagram (20 inches) .......     33
GS2 Board Schematic Diagram (26 inches) .......     35
GS5 Board Schematic Diagram (23 inches) .......     37
H Board Schematic Diagram ..............................
39
B1 Printed Wiring Board ....................................
40
H Printed Wiring Board ......................................
41
GS1 Printed Wiring Board (20 inches) ..............
42
GS2 Printed Wiring Board (26 inches) ..............
43
GS5 Printed Wiring Board (23 inches) ..............
44
5. EXPLODED  VIEWS
5-1.
Chassis (20 & 23 inches) ....................................
46
5-2.
Chassis (26 inches) .............................................
47
5-3.
Rear Cover, Power Supply Cords
 & Bezel (20 & 23 inches) ..................................
48
5-4.
Rear Cover, Power Supply Cords
 & Bezel (26 inches) ...........................................
49
6. ELECTRICAL  PARTS  LIST ..................................     50  
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY SHADING AND MARKED
  
 
 ON
THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
WARNING !!
AN ISOLATION TRANSFORMER SHOULD BE USED DURING
ANY SERVICE WORK TO AVOID POSSIBLE SHOCK HAZARD
DUE TO LIVE CHASSIS, THE CHASSIS OF THIS RECEIVER IS
DIRECTLY CONNECTED TO THE POWER LINE.
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