1
20A1-RU
21A1-RU
21A2-RU
1-21-1
SERVICE MANUAL
(20A1-RU, 21A1-RU) (21A2-RU)
COLOUR TELEVISION
Chassis No. UA-1
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.
MODELS
SHARP CORPORATION
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.
CONTENTS
» SPECIFICATIONS .............................. 2
» IMPORTANT SERVICE NOTES ......... 2
» ADJUSTMENT PRECAUTIONS ......... 3
» TROUBLE SHOOTING TABLE ......... 19
» HOTEL MODE APPLICATION .......... 21
» SOLID STATE DEVICE BASE
DIAGRAM ......................................... 22
» WAVEFORMS ................................... 23
» CHASSIS LAYOUT ........................... 24
» DESCRIPTION OF SCHEMATIC DIA-
GRAM ............................................... 26
» SCHEMATIC DIAGRAM
■ CRT Unit ....................................... 27
■ MAIN Unit ..................................... 28
» BLOCK DIAGRAM ............................ 34
» PRINTED WIRING BOARD ASSEM-
BLIES ................................................ 39
» REPLACEMENT PARTS LIST
■ ELECTRICAL PARTS ................... 44
■ MISCELLANEOUS PARTS........... 48
■ SUPPLIED ACCESSORIES ......... 48
■ PACKING PARTS ......................... 48
■ CABINET PARTS.......................... 49
Page Page
FEATURE
Ë
Multi 18 Systems
Ë
Full Auto Channel Preset and Auto Channel Skip
Ë
100-CH Program Memory
Ë
High Contrast Picture
Ë
Black Stretch Circuit
Ë
CATV (Hyper Band) Ready < Used Frequency Synthesizer
Tuner>
Ë
AVL (Sound Keeper) Function
Ë
Hotel Mode
Ë
On Timer / Sleep Timer / Reminder Timer
Ë
Colour Comb Filter Function (NTSC only)
Ë
Blue Back Noise Mute
Ë
Rear AV-In/Out Terminals and Front AV-In
Ë
English and Russian OSD
20A1-RU
21A1-RU
21A2-RU
SX0M220A1-RU/
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