GDM-500PS, GDM-500PST - Sony Monitor Service Manual (repair manual). Page 4

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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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5

2-1.

Cabinet Removal .................................................. 13

2-2.

D Board Removal ................................................ 13

2-3.

G Board Removal ................................................ 14

2-4.

A Board Removal ................................................ 14

2-5.

L Board Removal ................................................. 15

2-6.

I/O Terminal Board Removal ............................... 15

2-7.

Service Position .................................................... 16

2-8.

H and J Boards Removal ..................................... 16

2-9.

Picture Tube Removal ......................................... 17

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5-1.

Block Diagrams .................................................... 21

5-2.

Frame Shcematic Diagram .................................... 27

5-3.

Circuit Boards Location ........................................ 29

5-4.

Schematic Diagrams and Printed Wiring Boards ..... 29

(1) Schematic Diagram of D Board ........................... 33

(2) Schematic Diagrams of G, GA, H,

J and L Boards ..................................................... 37

(3) Schematic Diagram of A Board ........................... 44

5-5.

Semiconductors .................................................... 49

6-1.

Chassis ................................................................. 51

6-2.

Picture Tube ......................................................... 52

6-3.

Packing Materials ................................................ 53

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