[TechAssist] Sony KV27TS29 AA-1 (SCC-F84C-A) Dead
- From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 30 Aug 2003 21:53:28 +0000
Sony
KV27TS29
Chassis SCC-F85C-A (AA-1)
Dead.
Unusual problem with set, customer did not say but I
seriously suspect that it is the victum of lightining (have had proababbly
at least a dozen other sets this week that were). the HOT, and the chopper
transistors test ok. Have found IC610 shorted (~12ohm) input to output it is
a 78L05 (on the soft start). Replaced it and now have regulated 5v on that
line. IC602 appears to be regulating (there is 5v on the output. Q603 does
not have any voltage on the collector but test out of circuit, D607 test ok
I think it is a Skottkey so reads low forward... but still not even a
blinking sleep light. Any ideas, Anyone find had this scenererio before or
would my surge hypothesis be the most plasusable? I have a Chassis from a
KV27V55 that appears to be almost identical with the exception of being more
elabroate (has S-VHS) that only needs to have the common power supply faults
(HOT, Choppers ..) fixed that I am Highly tempted to repair and put in if a
solution is not easily obtainable.
Peter Oliver
Tucson Radio TV
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