[TechAssist] Re: RCA CTC169 (PS27113) HOT Q4401 Shorts after about 30 seconds.
- From: Dale Lubow <harristv@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 30 Nov 2005 08:09:05 -0600
The timing with my sencore was perfect, I even took out the flyback and did
a dynamic check. I failed to get the run B+ before it went out again.
Dale
--
Dale A. Lubow CET
Harris TV & Appliance
335 Lincoln Way
Ames, IA 50010
515-232-1109 (Voice)
515-232-3356 (Fax)
HarrisTV@xxxxxxxxx
On 11/29/05, al m <ampm@xxxxxxx> wrote:
>
> 123V is way too low. What was the B+ in run mode? Did you check the timing
> on the HOT?
> Al Marquardt
> ampm@xxxxxxx
> Al Marquardt Electronic Repair
> 206 W Main
> Girardville Pa. 17935
> ----- Original Message -----
> From: "Dale Lubow" <harristv@xxxxxxxxx>
> To: "TechAssist" <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, November 29, 2005 11:05 PM
> Subject: [TechAssist] RCA CTC169 (PS27113) HOT Q4401 Shorts after about 30
> seconds.
>
>
> > Unit came in with the HOT Q4401 shorted. I thought I would cover all my
> > bases by replacing CR4401, C4401, CR4402, C4402, C4403, CR4118, C4145.
> > Also
> > soldered normal flyback pins, driver transformer pins, Pincushion
> > transformer pins and any other questionable connections. Before I
> applied
> > B+
> > to the deflection circuit I made sure it wasn't running to high.
> Actually
> > it
> > was running 123 volts in standby which I think is a little low. I even
> > measured the HV at 29KV before I connected the CRT. So I hooked
> everything
> > up, pressed the power button and I had sound and picture. It looked like
> > it
> > was running normally but in about 30 seconds it shut down and shorted
> the
> > HOT again. The transistor was even still cold to the touch. Does any one
> > have any ideas on what might be going on?
> > TIA,
> > Dale
> >
> > --
> > Dale A. Lubow CET
> > Harris TV & Appliance
> > 335 Lincoln Way
> > Ames, IA 50010
> > 515-232-1109 (Voice)
> > 515-232-3356 (Fax)
> > HarrisTV@xxxxxxxxx
> >
> >
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