21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
SERVICE MANUAL
COLOUR TELEVISION
Chassis No.GA-7
Blue Back Function
Aperture Control Circuit
Auto Fine Tuning
NTSC Colour Comb Filter
High Contrast Picture ( Black Stretch Circuit)
FEATURES
PAL-B/G, D/K
Frequency Synthesizer Tuner
Full Auto System
100-CH Program Memory
CATV (Hyper Band Ready)
Hotel Mode
White Temperature Select
Off Timer
Multi Languages OSD (English/Thai)
Rear AV IN / OUT Terminals
Child Lock
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and
only parts identical to those specified should be used.
CONTENTS
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing
this chassis. To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to qualified service personnel.
WARNING
CHAPTER 1. SPECIFICATIONS
[1] SPECIFICATIONS ......................................... 1-1
CHAPTER 2. IMPORTANT SERVICE NOTES
[1] IMPORTANT
SERVICE
NOTES .................... 2-1
CHAPTER 3. ADJUSTMENT PRECAUTIONS
[1] ADJUSTMENT
PRECAUTIONS .................... 3-1
[2] ADJUSTMENT ............................................. 3-14
CHAPTER 5. TROUBLE SHOOTING FLOWCHART
[1] TROUBLE
SHOOTING
FLOWCHART .......... 5-1
CHAPTER 6. SOLID STATE DEVICE BASE DIAGRAM
[1]
SOLID STATE DEVICE BASE DIAGRAM..... 6-1
CHAPTER 7. CHASSIS LAYOUT
[1] CHASSIS
LAYOUT ....................................... 7-1
CHAPTER 9. DESCRIPTION OF SCHEMATIC DIA-
GRAM
[1] DESCRIPTION
OF
SCHEMATIC
DIAGRAM... 9-1
CHAPTER 10. WAVEFORMS
[1] WAVEFORMS ............................................... 10-1
CHAPTER 11. SCHEMATIC DIAGRAM
[1]
SCHEMATIC DIAGRAM : CRT UNIT ............ 11-1
[2]
SCHEMATIC DIAGRAM : MAIN UNIT .......... 11-2
CHAPTER 12. PRINTED WIRING BOARD ASSEM-
BLIES
[1] PWB-A
:
MAIN
UNIT ..................................... 12-1
[2]
PWB-B : CRT UNIT ....................................... 12-3
Parts Guide
CHAPTER 4. MEMORY MAP
[1] MEMORY MAP...................................................
Front AV-IN Terminal (Model 21F-PT220)
4-1
CHAPTER 8. BLOCK DIAGRAM
[1]
BLOCK DIAGRAM : MAIN UNIT................... 8-1
[2] BLOCK DIAGRAM : CRT UNIT ...................... 8-9
SHARP MANUFACTURING (THAILAND) CO.,LTD.
21F-PT220
21F-PA18
21F-PA18(B)
21F-PD250
1st Edition
21F-PA18
21F-PA18(B)
21F-PD250
21F-PT220
Содержание 21F-PA18
Страница 64: ...21F PD250 21F PT220 21F PA18 21F PA18 B 7 1 CHAPTER 7 CHASSIS LAYOUT 1 CHASSIS LAYOUT ...
Страница 65: ...21F PD250 21F PT220 21F PA18 21F PA18 B 7 2 ...
Страница 66: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 1 CHAPTER 8 BLOCK DIAGRAM 1 BLOCK DIAGRAM MAIN UNIT ...
Страница 67: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 2 ...
Страница 68: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 3 ...
Страница 69: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 4 ...
Страница 70: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 5 2 BLOCK DIAGRAM CRT UNIT ...
Страница 72: ...21F PD250 21F PT220 21F PA18 21F PA18 B 10 1 CHAPTER 10 WAVEFORMS 1 WAVEFORMS ...
Страница 73: ...21F PD250 21F PT220 21F PA18 21F PA18 B 11 1 CHAPTER 11 SCHEMATIC DIAGRAM 1 SCHEMATIC DIAGRAM CRT UNIT ...
Страница 74: ...21F PD250 21F PT220 21F PA18 21F PA18 B 11 2 2 SCHEMATIC DIAGRAM MAIN UNIT ...
Страница 75: ...21F PD250 21F PT220 21F PA18 21F PA18 B 11 3 ...
Страница 76: ...21F PD250 21F PT220 21F PA18 21F PA18 B 11 4 ...
Страница 77: ...21F PD250 21F PT220 21F PA18 21F PA18 B 11 5 10 11 12 13 14 15 16 17 18 19 ...
Страница 79: ...21F PD250 21F PT220 21F PA18 21F PA18 B 12 2 2 PWB A MAIN CHIP SIDE ...