[TechAssist] Re: Sanyo AVM2758G (G5G-2758G0) AC hum thru picture
- From: <hartstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 23 Jun 2003 21:29:03 -0300
Phil,the G5G &G5J are very similiar chass.Check ''ripple filters''
Q466&Q491=2SD400 & associated E caps in this cct.Can send partical print if
req...........
Don of HARTS-TVCR-ASC
9 Robert St,Oromocto,NB,Canada,E2V3N2
Tel-506-357-9785,Fax-506-357-6010
hartstv@xxxxxxxxxxx
----- Original Message -----
From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, June 23, 2003 7:02 PM
Subject: [TechAssist] Sanyo AVM2758G (G5G-2758G0) AC hum thru picture
> 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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