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TV Products CSV-1
Service Bulletin
Sony Service Company - Technical Services
A Division of Sony Electronics Inc.
Sony Drive, Park Ridge, New Jersey 07656


Model: KP-46S55/53S55 No. 236
Subject: Change in Horizontal Output Transistor Date: November 30, 1994


Symptom:
(111) If the Horizontal Output transistor Q811 should fail, please replace it with the
transistor and diode below.



Solution: On the "N" Board, please replace the Horizontal Output transistor Q811 with the
transistor and diode below.




REF FORMER NEW
DESCRIPTION PART NUMBER DESCRIPTION PART NUMBER

Q811 2SC4927 8-729-016-32 2SD-1887 8-729-805-07
D817 ERC06-15S 8-719-945-80



Mount the diode across the legs of C840 on the "N" Board. No gap should
be present between the underbelly of the capacitor and the diode. The
cathode of the diode should be connected to the collector of the Horizontal
Output transistor.




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