Read Sony GDM-FW900 Service Manual online
GDM-FW900
– 5 –
TABLE OF CONTENTS
Section
Title
Page
1. GENERAL
................................................................. 1-1
2. DISASSEMBLY
2-1.
Cabinet Assy Removal ...................................... 2-1
2-2.
D Board Removal .............................................. 2-1
2-3.
G Board Removal .............................................. 2-2
2-4.
A Board and I/O Terminal Board Assy
Removal ............................................................. 2-2
2-5.
S Board Removal .............................................. 2-3
2-6.
N Board Removal .............................................. 2-3
2-7.
Service Position .................................................. 2-4
2-8.
Picture Tube Removal ........................................ 2-4
2-9.
Control Block Assy Removal ........................... 2-5
2-10. J Board Removal ............................................... 2-6
2-11. US Board Removal ............................................ 2-6
2-12. Harness Location ............................................... 2-7
3. SAFETY RELATED ADJUSTMENT
............. 3-1
4. ADJUSTMENTS
..................................................... 4-1
5. DIAGRAMS
5-1.
Block Diagrams .................................................. 5-1
5-2.
Frame Schematic Diagram ................................. 5-9
5-3.
Circuit Boards Location ..................................... 5-11
5-4.
Schematic Diagrams and Printed Wiring
Boards ................................................................. 5-11
(1)
Schematic Diagram of D Board ........................ 5-13
(2)
Schematic Diagram of A Board ........................ 5-19
(3)
Schematic Diagram of S Board ......................... 5-25
(4)
Schematic Diagrams of N (a, b, c) Board
5-27
(5)
Schematic Diagram of G Board ........................ 5-35
(6)
Schematic Diagram of US Board ...................... 5-39
(7)
Schematic Diagrams of J, H Boards ................. 5-42
5-5.
Semiconductors ................................................. 5-44
6. EXPLODED VIEWS
6-1.
Chassis ............................................................... 6-1
6-2.
Picture Tube ...................................................... 6-2
6-3.
Packing Materials ............................................... 6-3
7. ELECTRICAL PARTS LIST
............................ 7-1
Note: Hand degauss must be used on stand-by or power-off condition.
This model has an automatic earth magnetism correction function by using an earth
magnetism sensor and a LCC coil. When using a hand degauss while monitor (LCC
coil) is being operated, it sometimes gets magnetized, and the system may not work
properly as a result.
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