[TechAssist] Re: RCA CTC-131 Chassis DOA
- From: "Edward Gaidies" <teltek2@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 10 Dec 2002 16:27:23 -0500
Ok..I'll scan it after supper, and send it PDF.
-Ed-
----- Original Message -----
From: "David Lessard" <mrfixit@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, December 10, 2002 4:16 PM
Subject: [TechAssist] Re: RCA CTC-131 Chassis DOA
>
> Ed,
>
> Nothing yet! I really must look into this beast. Please email me whatever
> you can spare sir.
>
> Thanks,
>
> David Lessard
> mrfixit@xxxxxxxxxxx
> (613)525-4502
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Edward Gaidies
> Sent: Tuesday, December 10, 2002 4:07 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA CTC-131 Chassis DOA
>
>
>
> David;
> Did you get anything on the CTC131 yet?
> I may have found something I can email you, let me know.
>
> -Ed-
> ----- Original Message -----
> From: "David Lessard" <mrfixit@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, December 10, 2002 12:50 PM
> Subject: [TechAssist] Re: RCA CTC-131 Chassis DOA
>
>
> >
> > Hollis,
> >
> > Whoops, the model number I sent you earlier (FPR710TR - CTC130) was for
a
> > different repair job, it was DOA, repaired several cold solder joints,
got
> > it up and running but with only a 6" viewable area dead center, tearing
on
> > the right side. Something in the vertical deflection circuit, I really
> > haven't had the time to investigate this much further. Any thoughts?
> >
> > The model I meant to send you (for CTC131 chasssis) is FLR2023S, this is
> the
> > dead one, never powered up after a normal shut down.
> >
> > Thanks.
> >
> > David Lessard
> > mrfixit@xxxxxxxxxxx
> > (613)525-4502
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of HSWAD@xxxxxxx
> > Sent: Tuesday, December 10, 2002 9:27 AM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: RCA CTC-131 Chassis DOA
> >
> >
> > Do you have a microfiche machine? If so I have the service literature
for
> > that chassis . Would be glad to mail it to you and when your finished
you
> > could mail it back. If you are interested just give me the first number
of
> > the serial number to indicate the year.In any case I will scan the fixes
I
> > have on that chassis and e-mail them to you. Hollis Bates, Field
> > Engineer-retired.
> > In a message dated 12/9/02 8:46:00 PM Eastern Standard Time,
> > mrfixit@xxxxxxxxxxx writes:
> >
> >
> > > Subj:[TechAssist] RCA CTC-131 Chassis DOA
> > > Date:12/9/02 8:46:00 PM Eastern Standard Time
> > > From:<A HREF="mailto:mrfixit@xxxxxxxxxxx";>mrfixit@xxxxxxxxxxx</A>
> > > Reply-to:<A
> > HREF="mailto:techassist@xxxxxxxxxxxxx";>techassist@xxxxxxxxxxxxx</A>
> > > To:<A
> HREF="mailto:techassist@xxxxxxxxxxxxx";>techassist@xxxxxxxxxxxxx</A>
> > > Sent from the Internet
> > >
> > >
> > >
> > >
> > > Fellow Technicians,
> > >
> > > I know! It's practically an antique, but this is a learning thing. I'm
> > > having some difficulties figuring out how the standby PS works. The
> thing
> > > is
> > > dead, so where do I start? There are no burnt fuses or resistors, HOT
is
> > > intact, no obvious cold solder joints. The standby PS transformer is
> > > working, feeding the shielded micro PCB, I find voltages in there, not
> > sure
> > > what I'm looking for though. Managed to indentify one out of the four
> IC's
> > > in there, 1716-2 bandswitching IC, the others are 1775-2, 1720-5 and
> > > 1773-3.
> > > If I new what the pinouts were that would be a start. A better
> > > understanding
> > > of the startup sequence would certainly be very helpful. What makes
the
> > > chopper (regulator) circuit start? Relay via micro? I guess I was born
> > just
> > > a little too late to really appreciate the engineering that went in to
> > this
> > > baby. OK, I'm being nice :-) I'm sure over the years many technicians
> > > cursed
> > > the design. Not a very easy chassis to work on, everthing is
everywhere
> > and
> > > difficult to get at. I'm thinking about making a wiring jig so I can
> plop
> > > the board around.
> > >
> > > Block diagrams, schematic, anything would greatly be appreciated.
> > >
> > > David Lessard
> > > mrfixit@xxxxxxxxxxx
> > > Alexandria Electronics
> > > 50 Harrison Street
> > > Alexandria, Ontario
> > > K0C-1A0
> > > (613)525-4502
> > >
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