Sharp CX48K4, Service Manual

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1
CX48K4
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
S30X8CX48K4//
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
CX48K4
SHARP CORPORATION
COLOUR TELEVISION
Chassis No. UA-1
Page
CONTENTS
»
SPECIFICATIONS ............................................. 2
»
IMPORTANT SERVICE NOTES ........................ 2
»
ADJUSTMENT PRECAUTIONS ........................ 3
»
UA1 HOTEL MODE APPLICATION ................. 15
»
TROUBLE SHOOTING TABLE ........................ 16
»
SOLID STATE DEVICE BASE DIAGRAM ....... 18
»
CHASSIS LAYOUT .......................................... 19
»
BLOCK DIAGRAM ........................................... 20
»
WAVEFORMS .................................................. 23
»
DESCRIPTION OF SCHEMATIC DIAGRAM .. 24
»
SCHEMATIC DIAGRAM
Ë
REMOTE CONTROL UNIT .......................... 24
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TUNER ......................................................... 25
Page
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MAIN UNIT ................................................... 26
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CRT UNIT ..................................................... 28
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HEADPHONE UNIT ..................................... 28
»
PRINTED WIRING BOARD ASSEMBLIES ..... 29
»
REPLACEMENT PARTS LIST
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ELECTRICAL PARTS
MAIN UNIT ................................................... 34
CRT UNIT ..................................................... 38
HEADPHONE UNIT ..................................... 38
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SUPPLIED ACCESSORIES ........................ 39
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PACKING PARTS ......................................... 39
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CABINET PARTS ......................................... 39
FEATURE
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NTSC (AV thru)
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Full Auto Search System
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100 CH Program Memory
Ë
CATV (Hyper Band) Ready
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AVL (Sound Keeper) Function
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High Contrast Picture (Black Stretch Circuit)
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ON Timer/Sleep Timer/Reminder Timer
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Blue Back Noise Mute
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Front AV In and Rear AV In/Out Terminals
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Colour-Comb Filter (NTSC AV In)
Ë
Hotel Mode
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Front Headphone Jack
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Multi Language OSD (English/Chinese/French/
Arabic/Malay/Russian)