Sanyo C21ZM45 Training Manual

COLOUR TELEVISION
TRAINING MANUAL
FILE NO.
Chassis Series A7-A
Table of Contents
Part 1 Chassis Description ................................................................................. 2-29
1.
Circuit Function Description ....................................................................................................2-4
2. CPU .......................................................................................................................................... 5-21
2-1
A-D
Key Identification .........................................................................................................................7
2-2 Option Switches ..................................................................................................................................8
2-3 System Switch Output .................................................................................................................l O.ll
2-4 Chroma ID ........................................................................................................................................l2
2-5 ldent ..................................................................................................................................................l2
2-6 Sync. ID 13
2-7 ,2C Bus ............................................................................................................................................13
.............................................................................................................................................
2-8 Band Switching .................................................................................................................................l4
2-9 Linear A~ ........................................................................................................................................l5
2-10 Digital AFT .................................................................................................................................l6.l7
2-11 Power& Proteti ..............................................................................................................................l8
2-12 Power On/Off (RCtransformerless model) .....................................................................................l9
2-13 Protection (RC transformerless model) ..........................................................................................2O
2-14 Horiz.Nert. Pulse ............................................................................................................................2l
3. System Switches ...................................................................................................................22-27
3-1 Sound Carrier Trap ...........................................................................................................................24
3-2 SIF Filtering ......................................................................................................................................25
3-3 Chroma Crystal SelWtion .................................................................................................................26
3-4 SECAM Switch .................................................................................................................................27
4. lF/Video/Chroma/Def . ................................................................................................................28
5. Audio ...........................................................................................................................................29
Part 2
Block Diagram of ICS .............................................................................30-32
1.
TDA8361/8362 AF/Video/Chroma/Def lection> ........................................................................30
2. TDA4661/V2 <1H Delay> ............................................................................................................31
3. TDA8395 cSECAM Decoder> ....................................................................................................32
4. LA78321LA7833 <Vertical Output> ...........................................................................................32
Part 3
Trouble Shooting Chart .........................................................................34-46
1.
Dead ....................................................................................................................................... 35-37
Dead (RC transformerless model) ......................................................................................38-40
2. No picture/No sound ............................................................................................................41-42
3. No picture-sound OK ................................................................................................................. 43
4. No sound-picture OK ................................................................................................................. 44
5. No colour ...............................................................................................................................45-46
L
REFERENCE NO. TI 520003
\