1
20GT-15
WARNING
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.
SERVICE MANUAL
COLOUR TELEVISION
S30X520GT-15/
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
original condition and only parts identical to those specified
be used.
MODEL
SERVICE MANUAL
COLOUR TELEVISION
MODEL 20GT-15
20GT-15
SHARP CORPORATION
20GT-15
Chassis No. UA-1
CONTENTS
Page
•
FEATURES ...................................................................................................................................................... 2
•
SPECIFICATIONS ........................................................................................................................................... 2
•
IMPORTANT SERVICE NOTES ...................................................................................................................... 3
•
ADJUSTMENT PRECAUTION ......................................................................................................................... 3
•
UA1 HOTEL MODE APPLICATION ................................................................................................................. 4
•
SERVICE MODE .............................................................................................................................................. 4
•
TROUBLE SHOOTING TABLE ...................................................................................................................... 18
•
SOLID STATE DEVICE BASE DIAGRAM ..................................................................................................... 20
•
CHASSIS LAYOUT ........................................................................................................................................ 21
•
BLOCK DIAGRAM ......................................................................................................................................... 22
•
WAVEFORMS ................................................................................................................................................ 25
•
SCHEMATIC DIAGRAM
•
DESCRIPTION OF SCHEMATIC DIAGRAM ................................................................................................. 26
■
INFRARED REMOTE CONTROL UNIT .................................................................................................... 27
■
TUNER ...................................................................................................................................................... 28
■
CRT UNIT .................................................................................................................................................. 29
■
MAIN UNIT ................................................................................................................................................ 30
•
PRINTED WIRING BOARD ASSEMBLIES .................................................................................................... 32
•
REPLACEMENT PARTS LIST
■
ELECTRICAL PARTS ................................................................................................................................ 37
■
SUPPLIED ACCESSORIES ...................................................................................................................... 41
■
PACKING PARTS ...................................................................................................................................... 41
■
CABINET PARTS ...................................................................................................................................... 41
Summary of Contents for 20GT-15
Page 23: ...21 20GT 15 CHASSIS LAYOUT ...
Page 24: ...20GT 15 20GT 15 22 23 BLOCK DIAGRAM MAIN UNIT BLOCK DIAGRAM ...
Page 25: ...20GT 15 24 CRT BLOCK DIAGRAM ...
Page 26: ...25 20GT 15 WAVEFORMS ...
Page 30: ...29 20GT 15 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 CRT UNIT ...
Page 34: ...20GT 15 36 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 PWB B CRT UNIT ...
