[TechAssist] Sanyo AVM2758G (G5G-2758G0) AC hum thru picture
- From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: "techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
- Date: Mon, 23 Jun 2003 18:02:33 -0400
Two white hum bands slowly moves up thru the picture.When the upper one
gets to the top, the bottom band is showing up.Picture bends in the area
of the bar. I've seen this caused by noise generated in the smps by bad
STR30130's,etc. I changed IC601 (STR30130), all four bridge diodes, the
main filter C606 (470mfd/200V).
Resoldered all over,even jumpered the power relay contacts while
happening,no help.(maybe the contacts were arcing).Takes about 5 min to
show up.I can turn off,then on the power and it instantly clears for a
few minutes.
Gotta be AC power supply hum...
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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