Sharp 21XF30 Service Manual

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.
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
» 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
» BLOCK DIAGRAM ......................................... 26
» WAVEFORMS ............................................... 31
» DESCRIPTION OF SCHEMATIC DIAGRAM .. 31
» SCHEMATIC DIAGRAM
MAIN UNIT ............................................... 32
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

FEATURE
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
CONTENTS
Page
» PACKING OF THE SET ................................... 56
WARNING

SHARP CORPORATION

COLOUR TELEVISION
Chassis No. UAF
MODELS
CRT UNIT ................................................. 38
MONO BILLINGUAL UNIT(21XF30) ........ 39
NICAM/A2 UNIT(21XF50) ........................ 40
» PRINTED WIRING BOARD ASSEMBLIES ... 42
» REPLACEMENT PARTS LIST
ELECTRICAL PARTS ............................... 48
MISCELLANEOUS PARTS ...................... 54
SUPPLIED ACCESSORIES ..................... 54
PACKING PARTS ..................................... 54
CABINET PARTS ..................................... 55
21XF30
21XF50
S42H621XF30//
21XF30
21XF50
Page