[TechAssist] Re: Sony KV-27FS12 chassis BA5 thumping sound
- From: gulftech@xxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 20 Jul 2005 16:20:08 -0500
Ben,
I second that motion. Had a KV32S25 with that symptom. Here are my
notes on that:
Has low growl when you try to turn it on. Replaced flyback 8-598-969-00.
No change. Replaced IC641/SI3090C/ 874992058. a&t.
HTH,
Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL 32563
850-934-8324 (Voice) 850-932-0819 (Fax)
On Wed, 20 Jul 2005 15:04:42 -0400 tjanphyl@xxxxxxxxxxxxxxx writes:
> If the thumping sound is coming thru the speakers, look and see if
> this set uses an upright regulator on the power supply G board.
> (There
> is a small black flat square upright pack behind it.) TO-220 case
> with
> about 7 pins for the 9VDC regoutput.I'm at home so can't be exact. I
>
> have changed several of those for that.
> Phil
>
> Phil Bader, Pres.
> Jan Phyl TV Inc
> Winter Haven, Fl
> (863) 299-8821
> estab. 1976
>
> ----- Original Message -----
> From: Ben Daniels <bens74820@xxxxxxxxx>
> Date: Wednesday, July 20, 2005 3:00 pm
> Subject: [TechAssist] Sony KV-27FS12 chassis BA5 thumping sound
>
> > This set had D513 bad in power for verticle -15 volt
> > source. When you turn on now you have reduced b+ with
> > thumping sound. Disconnect H/O transistor and the 130v
> > comes to normal with good drive wave form and
> > voltages. Anyone had this before? I am thinking maybe
> > hvt??? Thanks Ben
> >
> > Randy Daniels
> > Ben's TV Repair
> > 123 Arlington St.
> > Ada, Okla. 74820
> > bens74820@xxxxxxxxx
> >
> >
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