[TechAssist] Re: RCA F20203BK/CTC175A..Dead
- From: "Tel-Tek" <teltek3@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 9 Apr 2004 08:53:35 -0400
I agree Jeff...any of those chassis, Dead...no Relay click, eliminate the
eeprom, so you don't waste a couple of hours, and then have to say
"duuuuuh".
You will quite likely find reasons the eeprom was corrupted, bad solder,
etc.
You're not new to this, but sometimes we forget the obvious.
-Ed-
Tel-Tek Electronics
Ontario-Canada
teltek3@xxxxxxxxxxxx
----- Original Message -----
From: "Jim Shupe" <jim@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, April 09, 2004 8:41 AM
Subject: [TechAssist] Re: RCA F20203BK/CTC175A..Dead
> Jeff...
> Rule of thumb for these "TOB" chassis': check the
> data lines at the eeprom...if they are active after a
> second or so of plug-in, the eeprom is most likely
> corrupted.
> If this part of the set is OK, the data lines will be
> quiet.
> Also try the cap across the HOT, although this
> usually only applies if the set shuts down at turn-on.
> As a general note, though, suspect the eeprom for
> most really odd problems that don't make sense. I try
> to rule this out very early in the job.
>
> Jim Shupe, CET
> Lloyd's TV
> Yucca Valley, CA
>
> --- Intrepid Video Support
> <support@xxxxxxxxxxxxxxxxxx> wrote:
> >
> >
> > Customer said the set was intermittent dead. I have
> > not gotten power to it at all.
> > I have 170vdc on HOT..too high. On Q4301, I also
> > have 170vdc. I changed Q4301 with one from a
> > scrapped
> > chassis, until I place an order and same problem. I
> > checked both Q4301's I have and they both are not
> > shorted or leaky..
> > Any other suggestions?
> > I did the tuner wrap already..
> > Another thing I found odd, I have 5vdc on all pins
> > of front panel switches..I unsoldered the pin from
> > the
> > micro and the 5v is on the pin.
> > Had to quit, for now...so this is as far as I got.
> > I hope for some good ideas by tomorrow..
> > Also, found C4155 and C4150 with high ESR..changed.
> > I scoped the clock and data lines and they are
> > there.
> >
> > Jeff Dougherty
> > Intrepid Video TV/VCR
> > 263 S Front St
> > Steelton PA 17113
> > ph..717-939-7708 fax...717-564-4952
> > www.intrepid-video.com www.tech-repair.net
> > A positive attitude may not solve all your problems,
> > but it will annoy enough people to make it worth the
> > effort.
> >
> >
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