Toshiba 28YT56, Service Manual

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Service Manual
AK49-001
1
TABLE OF CONTENTS
1. INTRODUCTION 4
1.1. Purpose
4
1.2. Scope 4
1.3. General Features 4
2. GENERAL DESCRIPTION 5
2.1. Introduction
5
2.2. System
Building Blocks 5
2.2.1. UOC-III (Ultimate-One-Chip) 5
2.2.1.1. Fav & B_Svhs & F_Svhs 8
2.2.1.2. Scart1 8
2.2.1.3. Scart2 8
2.2.1.4. Scart3 9
2.2.1.5. VestelBus 9
2.2.1.6. Audio 9
2.2.1.7. Port Allocations 10
2.2.1.8. Power Management 11
2.2.1.9. Input & Output Performance 12
2.2.1.10. Feature Board 14
2.2.2. Audio Block 15
2.2.2.1. Audio Power Amplifier 15
2.2.2.2. Headphone Amplifier 17
2.2.2.3 Pop Noise Protection Circuit
18
2.2.3. Deflection & Display Block 19
2.2.3.1. Horizontal Deflection 19
2.2.3.2. Vertical Deflection 20
2.2.3.3. CRT Board 22
2.2.3.4. Rotation 23
2.2.3.5. X-RAY Protection 24
2.2.3.6. Dynamic Focus 24
2.2.3.7 Screen & Focus Short Circuit Protection 25
2.2.4. SMPS BLOCK 28
2.2.4.1. Primary Block 28