Sharp 25WG3, Service Manual

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25WG3
SY8A725WG3///
SERVICE MANUAL
SHARP CORPORATION
COLOUR TELEVISION
Chassis No. SS-1
MODEL
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.
WARNING
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 be used.
CONTENTS
Page Page
• FEATURE ............................................................ 2
• SPECIFICATIONS ............................................... 2
• IMPORTANT SERVICE NOTES ......................... 3
• ADJUSTMENT PRECAUTIONS ......................... 3
• SERVICE MODE .................................................. 4
• SERVICE ADJUSTMENT ................................... 7
• TROUBLESHOOTING ...................................... 13
• SOLID STATE DEVICE BASE DIAGRAM ........ 14 • WAVEFORMS ................................................... 15
• DESCRIPTION OF SCHEMATIC DIAGRAM .... 15
• BLOCK DIAGRAM ............................................. 16
• CHASSIS LAYOUT ............................................ 22
• SCHEMATIC DIAGRAM ................................... 24
• PRINTED WIRING BOARD ASSEMBLIES ....... 32
• PARTS LIST ...................................................... 37
25WG3
COLOUR
TELEVISION
MODEL
25WG3
SERVICE
MANUAL