SHARP CORPORATION
SERVICE MANUAL
21XF30
21XF50
MODELS
In the interests of user-safety (Required by safety regulations in some countries) the set should be re-
stored to its original condition and only parts identical to those specified should be used.
FEATURE
Ë
World Multi 21 System(21XF50)
Ë
NICAM/A2 (21XF50)
Ë
Mono Bilingual (21XF30)
Ë
AV Stereo (21XF30)
Ë
Full Auto Search System
Ë
100-CH Program Memory
Ë
CATV (Hyper Band) Ready
Ë
Surround System
Ë
English & Thailand Language OSD
Ë
ON/OFF/Reminder Timer
Ë
High Contrast Picture (Black Stretch Circuit)
Ë
Colour Comb Filter (NTSC only)
Ë
Blue Back Noise Mute
Ë
Front AV IN/ Rear AV IN/OUT Terminal
Ë
Hotel Mode
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.
»
SPECIFICATIONS ........................................... 2
»
IMPORTANT SERVICE NOTES ...................... 2
»
ADJUSTMENT PRECAUTIONS ..................... 3
»
MEMORY MAP .............................................. 13
»
HOTEL MODE APPLICATION ...................... 19
»
TROUBLE SHOOTING TABLE ...................... 20
»
SOLID STATE DEVICE BASE DIAGRAM ..... 22
»
CHASSIS LAYOUT ........................................ 24
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BLOCK DIAGRAM ......................................... 26
»
WAVEFORMS ............................................... 31
»
DESCRIPTION OF SCHEMATIC DIAGRAM .. 31
»
SCHEMATIC DIAGRAM
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MAIN UNIT ............................................... 32
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CRT UNIT ................................................. 38
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MONO BILLINGUAL UNIT(21XF30) ........ 39
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NICAM/A2 UNIT(21XF50) ........................ 40
»
PRINTED WIRING BOARD ASSEMBLIES ... 42
»
REPLACEMENT PARTS LIST
■
ELECTRICAL PARTS ............................... 48
■
MISCELLANEOUS PARTS ...................... 54
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SUPPLIED ACCESSORIES ..................... 54
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PACKING PARTS ..................................... 54
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CABINET PARTS ..................................... 55
»
PACKING OF THE SET ................................... 56
Page
Page
CONTENTS
COLOUR TELEVISION
Chassis No. UAF
S42H621XF30//
21XF30
21XF50
Summary of Contents for 21XF30
Page 23: ...23 21XF30 21XF50 23 1 23 2 M E M O ...
Page 24: ...24 21XF30 21XF50 CHASSIS LAYOUT 21XF30 ...
Page 25: ...25 21XF30 21XF50 CHASSIS LAYOUT 21XF50 ...
Page 26: ...26 21XF30 21XF50 BLOCK DIAGRAMS MAIN 1 UNIT 21XF30 ...
Page 27: ...27 21XF30 21XF50 ...
Page 28: ...28 21XF30 21XF50 MAIN 1 UNIT 21XF50 ...
Page 29: ...29 21XF30 21XF50 ...
Page 33: ...33 21XF30 21XF50 10 11 12 13 14 15 16 17 18 19 ...
Page 34: ...34 21XF30 21XF50 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 MAIN UNIT 1 21XF50 ...
Page 35: ...35 21XF30 21XF50 10 11 12 13 14 15 16 17 18 19 ...
Page 36: ...36 21XF30 21XF50 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 MAIN UNIT 2 21XF30 ...
Page 37: ...37 21XF30 21XF50 MAIN UNIT 2 21XF50 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 ...
Page 38: ...38 21XF30 21XF50 CRT UNIT 21XF30 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 CRT UNIT 21XF50 ...
Page 39: ...39 21XF30 21XF50 MONO BILLINGUAL UNIT 21XF30 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 ...
Page 40: ...40 21XF30 21XF50 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 NICAM A2 UNIT 21XF50 ...
Page 41: ...41 21XF30 21XF50 10 11 12 13 14 15 16 17 18 19 ...
Page 43: ...43 21XF30 21XF50 10 11 12 13 14 15 16 17 18 19 ...
Page 44: ...44 21XF30 21XF50 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 PWB A MAIN Unit Chip Parts Side ...
Page 45: ...45 21XF30 21XF50 10 11 12 13 14 15 16 17 18 19 ...
Page 47: ...47 21XF30 21XF50 PWB D MONO BILLINGUAL Unit Component Side A B C D E F G H I J 1 2 3 4 5 ...
Page 57: ...Ref No Part No Description Code Ref No Part No Description Code 57 21XF30 21XF50 ...