1
25WF30
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
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.
MODEL
25WF30
SHARP CORPORATION
COLOUR TELEVISION
Chassis No. NFC
Page
CONTENTS
»
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
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POWER UNIT .............................................. 34
Page
Ë
OPERATION UNIT ....................................... 36
»
PRINTED WIRING BOARD ASSEMBLIES ..... 37
»
SOLID STATE DEVICE BASE DIAGRAM ....... 45
»
REPLACEMENT PARTS LIST
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ELECTRICAL PARTS .................................. 46
Ë
SUPPLIED ACCESSORIES ......................... 54
Ë
MISCELLANEOUS PARTS .......................... 54
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PACKING PARTS ......................................... 54
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CABINET PARTS ......................................... 55
»
PACKING OF THE SET ................................... 56
FEATURES
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
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
(Monitor Out), Headphone and Front AV-In 3
Ë
Component Intput Terminal
S21Q425WF30//
Summary of Contents for 25WF30
Page 18: ...6 5 4 3 2 1 A B C D E F G H 18 25WF30 CHASSIS LAYOUT ...
Page 19: ...6 5 4 3 2 1 A B C D E F G H 19 25WF30 BLOCK DIAGRAM 1 ...
Page 23: ...6 5 4 3 2 1 A B C D E F G H 26 25WF30 BLOCK DIAGRAM 5 ...
Page 26: ...6 5 4 3 2 1 A B C D E F G H 29 25WF30 SCHEMATIC DIAGRAM CRT Unit ...
Page 30: ...6 5 4 3 2 1 A B C D E F G H 36 25WF30 SCHEMATIC DIAGRAM OPERATION Unit ...
Page 35: ...6 5 4 3 2 1 A B C D E F G H 44 25WF30 PWB D OPERATION Unit Wiring Side ...
