[TechAssist] Sony KV27FS100L power generator surged, main +135V source shorted: zener D614. Other?
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: "techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
- Date: Fri, 25 Mar 2005 14:07:02 -0500
This guy used a power generator for his house during the hurricanes.
Dead, fuses OK. First, noticed HOT collector had short to gnd. Lifted
HOT, short still on the +135V line. Traced back (no easy task) to the
main SMPS source. SMPS T603 pin17, to rectifiers D611 and D624 (both
OK). Then there's a zener to ground in this output, D614 (EZ0150AV1 /
8-719-057-52). I think it's 150V a clamp for when the source climbs too
high. Shorted. Lifted it, all shorts gone. Any ideas on this? I can
either just lift it and try powering up, or sub a crude substitute as
test (say two 75v in series=150V). Anyone seen this diode be bad, and
anything else usually goes?
Phil Bader
--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
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