[TechAssist] Re: RCA P61310YX1, DTV307 chassis, standby sypply will not start.
- From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 19 Oct 2004 17:18:42 -0400
I believe there is a training manual on the Thomson web site. I repaired a
few using it. Its a good manual
Phillip R Hull STET
phil245@xxxxxxxxxxxxx
FAX 517--569-3075
Professional Technicians only
----- Original Message -----
From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, October 19, 2004 5:04 PM
Subject: [TechAssist] Re: RCA P61310YX1, DTV307 chassis, standby sypply will
not start.
> Thanks but already did all that, talked to tech line again today, no
> help, shipping it to TSM, we'll see if they get it fixed.
>
****************************************************************************
***************************************
> Since 1972
> Jim Myers
> Telrad Electronics
> Fort Wayne, Indiana
>
>
> Lakeside TV wrote:
> > Jim, the last one I worked on wouldn't start. We normally change about a
dozen parts when the standby supply blows. Some may be CYA but no callbacks.
Also check CR14108 and R14106 (causes intermittent startup) and per Peggy at
Thomson remove C14130 (surface mount next to Q14601) and scrape glue. do not
replace it. also change R14608.
> >
> > Bob Norcross
> > Lakeside TV Service, Inc.
> > Clinton Township, MI 48038
> > Jim Myers <jr.myers@xxxxxxxxxxx> wrote:
> > Q14601 was blown with a burn through its case, I have replaced Q14601,
> > CR14613, CR14615, CR14602, CR14611, R14604, Q14602 and Q14603, Also I
> > have checked all other parts in the supply and checked for shorts on the
> > outputs. Darn thing just does not try to start. I've called the RCA tech
> > line twice about it. The last call they said I must replace all three
> > transistors at the same time so I ordered two sets and replaced all
> > three. Still it will not start, it does not even twitch or jiggle when I
> > apply AC. I monitor Q14601 with scope and one of the output side diodes
> > with meter and flip the variac on and nothing. Q14601 always has about
> > 12.5 volts on it's gate and zero on the source. The RCA tech says this
> > means the transistor is open. If this were not a FET I would agree. Are
> > all the new ones bad? I have installed three new ones now. Has anyone
> > had this experience?
> > Thanks,
> >
****************************************************************************
***************************************
> > Since 1972
> > Jim Myers
> > Telrad Electronics
> > Fort Wayne, Indiana
> >
>
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