Sharp 25WF30 Service Manual

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.
Ë 100 CH Program Memory
Ë AV Mode (Standard/ Dynamic/ Soft)
Ë CATV Hyper Band Ready
Ë Colour Comb Filter (NTSC)
Ë ON/OFF Velocity Modulation
Ë Black Stretch Circuit
Ë Picture Noise Reduction
Ë White Temp. Select
» SPECIFICATIONS ............................................. 2
» IMPORTANT SERVICE NOTES ........................ 2
» ADJUSTMENT PRECAUTIONS ........................ 3
» TROUBLE SHOOTING TABLE ....................... 13
» CHASSIS LAYOUT .......................................... 18
» BLOCK DIAGRAM ........................................... 19
» WAVEFORMS .................................................. 27
» DESCRIPTION OF SCHEMATIC DIAGRAM .. 28
» SCHEMATIC DIAGRAM
Ë CRT UNIT ..................................................... 29
Ë MAIN UNIT ................................................... 30
Ë POWER UNIT .............................................. 34
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

MODEL
FEATURES
Ë Aperture Control
Ë Bass+
Ë Multi Language (English/Thai)
Ë Mono / Bilingual Select
Ë ON/OFF Reminder Timer
Ë Power Save Mode
Ë Rear AV-In 1 & 2, S-Video In, AV Output
Ë Component Intput Terminal
CONTENTS
Page
WARNING

SHARP CORPORATION

1

COLOUR TELEVISION

Chassis No. NFC
25WF30
(Monitor Out), Headphone and Front AV-In 3
Ë OPERATION UNIT ....................................... 36
» PRINTED WIRING BOARD ASSEMBLIES ..... 37
» SOLID STATE DEVICE BASE DIAGRAM ....... 45
» REPLACEMENT PARTS LIST
Ë ELECTRICAL PARTS .................................. 46
Ë SUPPLIED ACCESSORIES ......................... 54
Ë MISCELLANEOUS PARTS .......................... 54
Ë PACKING PARTS ......................................... 54
Ë CABINET PARTS ......................................... 55
» PACKING OF THE SET ................................... 56
25WF30
S21Q425WF30//
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