[TV] Re: * RCA 35" No Horiz Scan
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[TV] Re: * RCA 35" No Horiz Scan
Hello:
I still think you have lost control over the pincushing
circuit, not sure but do you have a stand up type board
near the H.O.T ? If so it has a dual op-amp ic, 8 pin IC, and a resistor
will open when you are missing
the horiz sweep.
Greg Zumbro
----- Original Message -----
From: "J Sven2" <jsven2@xxxxxxxxx>
To: <tv@xxxxxxxxxxxxxxx>
Sent: Saturday, April 02, 2005 10:47 PM
Subject: [TV] Re: * RCA 35" No Horiz Scan
> if you read down to the bottom of this email, it is
> listed in the original email. (CTC179dL)
>
> Thanks
>
> --- al m <ampm@xxxxxxx> wrote:
>
> > Chassis #?
> > Al Marquardt
> > ampm@xxxxxxx
> > Al Marquardt Electronic Repair
> > 206 W Main
> > Girardville Pa. 17935
> > ----- Original Message -----
> > From: <tom_rf@xxxxxxxxxxxxx>
> > To: <tv@xxxxxxxxxxxxxxx>
> > Sent: Thursday, March 31, 2005 12:05 AM
> > Subject: [TV] Re: * RCA 35" No Horiz Scan
> >
> >
> > > the range ctls appear to be working in all but
> > pin/horiz width
> > > adjustments...by the way I am winging it w/out a
> > schematic, I might have
> > > to
> > > throw in the towel at some pt and download one.
> > >
> > > thanks,
> > >
> > > tom_rf@xxxxxxxxxxxxx
> > >
> > > ----- Original Message -----
> > > From: "Star-Tech" <STAR-TECH@xxxxxxxxxxxx>
> > > To: <tv@xxxxxxxxxxxxxxx>
> > > Cc: <star-tech@xxxxxxxxxxxx>
> > > Sent: Wednesday, March 30, 2005 10:07 PM
> > > Subject: [TV] Re: * RCA 35" No Horiz Scan
> > >
> > >
> > >> Hello:
> > >>
> > >> Do the numbers move in the horizonal
> > parameter
> > >> for the set-up service mode? Should be at 20 to
> > 22 for
> > >> width. If so you might find a shorted transistor
> > in the
> > >> pincushing circuit.
> > >>
> > >>
> > Greg Zumbro
> > >> ----- Original Message -----
> > >> From: <tom_rf@xxxxxxxxxxxxx>
> > >> To: <tv@xxxxxxxxxxxxxxx>
> > >> Sent: Wednesday, March 30, 2005 10:05 PM
> > >> Subject: [TV] Re: * RCA 35" No Horiz Scan
> > >>
> > >>
> > >> >
> > >> > Hey guys,
> > >> > I am finally replacing the parts
> > ordered, the two caps replaced
> > >> have
> > >> > restored the picture and is starting to look
> > like a TV again; However,
> > >> > I
> > >> > still have symptoms:
> > >> > 1.) Slight overscan, & there is
> > no WIDTH adjustment
> > >> > functionality in service mode "76".
> > >> > 2.) I have slight "pincushion"
> > warping upper /lower
> > > sides.
> > >> > 3.) Rear centering pot having
> > no effect on picture.
> > >> >
> > >> > upon looking, I found that I have left out
> > cr4408 which is missing. I
> > >> will
> > >> > p/u that diode tomorrow.
> > >> > *QUESTION: Will mssing CR4408 cause all these
> > symptoms?
> > >> >
> > >> > Thanks for your response,
> > >> >
> > >> > tom_rf@xxxxxxxxxxxxx
> > >> >
> > >> > ----- Original Message -----
> > >> > From: "John Conti" <contitv@xxxxxxxxxxx>
> > >> > To: <tv@xxxxxxxxxxxxxxx>
> > >> > Sent: Friday, February 25, 2005 9:54 AM
> > >> > Subject: [TV] Re: * RCA 35" No Horiz Scan
> > >> >
> > >> >
> > >> > > Tom, c 4407 is a vertical yoke return cap if
> > open this will give you
> > >> > > a
> > >> > thin
> > >> > > vertical line the part number is 227315. the
> > part # for c4406 is
> > > 196050.
> > >> > and
> > >> > > for the diode cr4408 use part # 140971.
> > >> > > is the set fixed are is it still not. i dont
> > know if your looking for
> > >> > part#s
> > >> > > john
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >From:
> > >> > > <tom_rf@xxxxxxxxxxxxx>
> > >> > > >Reply-To: tv@xxxxxxxxxxxxxxx
> > >> > > >To: <tv@xxxxxxxxxxxxxxx>
> > >> > > >Subject: [TV] Re: * RCA 35" No Horiz Scan
> > >> > > >Date: Thu, 24 Feb 2005 20:16:30 -0600
> > >> > > >
> > >> > > >I appreciate your reply,
> > >> > > >
> > >> > > > *TV Symptoms are no horiz. (Bright
> > Vertical line in the
> > > center
> > >> of
> > >> > > >the
> > >> > > >screen)
> > >> > > > To elaborate more on the prob
> > componets so far:
> > >> > > > * C4407 is labled
> > "S-Cap" and is a .67mic 250v
> > >> cap.
> > >> > > >(swollen)
> > >> > > > * C4406 is a . *2 mic
> > 80v electrolyt
> > >> (blown-like
> > >> > a
> > >> > > >firecracker)
> > >> > > > *They both have runs leading to
> > the back of the board
> > >> > leading
> > >> > > >to
> > >> > > >the horiz ctrg/ h lin. pots/ and C4407 is
> > >> > > > trace leads to horiz yoke wire.
> > (There are also other parts
> > >> labled
> > >> > > >"S-Cap" in functionality in this circ.
> > area.)
> > >> > > >
> > >> > > > There is a connecting
> > CR4408 to the smaller
> > >> voltage
> > >> > > >cap
> > >> > > >which may be suspect,
> > >> > > > (it's label is 51
> > 84408...2.0A Fast Recovery
> > >> > > >Rect.)checking good? (w/ 10Mohm diode chk).
> > >> > > >
> > >> > > >
> > >> > > >
> > >> > > >tom_rf@xxxxxxxxxxxxx
> > >> > > >
> > >> > > >----- Original Message -----
> > >> > > >From: "dek" <dek@xxxxxxxxxxxxxxx>
> > >> > > >To: <tv@xxxxxxxxxxxxxxx>
> > >> > > >Sent: Thursday, February 24, 2005 5:18 AM
> > >> > > >Subject: [TV] Re: * RCA 35" No Horiz Scan
> > >> > > >
> > >> > > >
> > >> > > > > Look for a diode in there that is the
> > equivalent of the 4118 in
> > > the
> > >> > 169,
> > >> > > > > but I forget what the actual number is.
> > Replace it, don't check
> > >> cause
> > >> > it
> > >> > > > > will check good.
> > >> > > > > Doug
> > >> > > > >
> > >> > > > > At 07:11 PM 2/23/05, you wrote:
> > >> > > > > >I am working on a 35" RCA CTC179dL
> > having no horiz scan,
> > >> > > >C407-electrolytic
> > >> > > > > >is blown apart, and C406 blue square cap
> > is swollen, butnot
> > >> checking
> > >> > > >shorted).
> > >> > > > > >If anyone has an excerpt from this
> > schematic, or have had this
> > > same
> > >> > > > > >particular componet problem it would be
> > apprec.
> > >> > > > > >
> > >> > > > > >
> > Thanks,
> > >> > > > > >
> > >> > > > > >tom_rf@xxxxxxxxxxxxx
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> >
> > >>
> >
>
>>--------------------------------------------------------------------------
-
> > >> > > >----
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> > >> > > > >
> > >> > > >
> > >> >
> > >>
> >
>
>>--------------------------------------------------------------------------
-
> > >> > > >----
> > >> > > > > >
> > >> > > > >
> > >> > > > >
> > >> > >
> > >> >
> > >>
> >
>
>>--------------------------------------------------------------------------
> > >> > > >-----
> > >> > > > > To remove yourself DO NOT Email
> > TV@xxxxxxxxxxxxxxx you MUST email
> > >> > > > > TV-REQUEST@xxxxxxxxxxxxxxx with REMOVE as
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> > >> > > > >
> > >> > >
> > >> >
> > >>
> >
>
>>--------------------------------------------------------------------------
> > >> > > >-----
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> >
>
>>--------------------------------------------------------------------------
-
> > >> > ----
> > >> > > >To remove yourself DO NOT Email
> > TV@xxxxxxxxxxxxxxx you MUST email
> > >> > > >TV-REQUEST@xxxxxxxxxxxxxxx with REMOVE as
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> > >> > > >TV email Archives at:
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> > >> > >
> > >> >
> > >>
> >
>
>>--------------------------------------------------------------------------
-
> > >> > ----
> > >> > > >
> > >> > >
> > >> > >
> >
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> --------------------------------------------------------------------------
> > >> > -----
> > >> > > To remove yourself DO NOT Email
> > TV@xxxxxxxxxxxxxxx you MUST email
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> > >> >
> > >>
> > >>
> >
> --------------------------------------------------------------------------
> > >> > -----
> > >> > >
> > >> >
> > >>
> > >>
> >
> --------------------------------------------------------------------------
> > >> -----
> > >> > To remove yourself DO NOT Email
> > TV@xxxxxxxxxxxxxxx you MUST email
> > >> > TV-REQUEST@xxxxxxxxxxxxxxx with REMOVE as the
> > subject.
> > >> > Sent VIA Tech Assist's email server-
> > tv@xxxxxxxxxxxxxxx
> > >> > TV email Archives at:
> > http://www.circuitwork.com/archive/TV/
> > >>
> > >>
> >
> --------------------------------------------------------------------------
> > >> -----
> > >> >
> > >>
> > >>
> >
> --------------------------------------------------------------------------
> > > -----
> > >> To remove yourself DO NOT Email
> > TV@xxxxxxxxxxxxxxx you MUST email
> > >> TV-REQUEST@xxxxxxxxxxxxxxx with REMOVE as the
> > subject.
> > >> Sent VIA Tech Assist's email server-
> > tv@xxxxxxxxxxxxxxx
> > >> TV email Archives at:
> > http://www.circuitwork.com/archive/TV/
> > >>
> >
> --------------------------------------------------------------------------
> > > -----
> > >>
> > >
> > >
> >
> --------------------------------------------------------------------------
-----
> > > To remove yourself DO NOT Email TV@xxxxxxxxxxxxxxx
> > you MUST email
> > > TV-REQUEST@xxxxxxxxxxxxxxx with REMOVE as the
> > subject.
> > > Sent VIA Tech Assist's email server-
> > tv@xxxxxxxxxxxxxxx
> > > TV email Archives at:
> > http://www.circuitwork.com/archive/TV/
> > >
> >
> --------------------------------------------------------------------------
-----
> > >
> > >
> >
> >
> >
> --------------------------------------------------------------------------
-----
> > To remove yourself DO NOT Email TV@xxxxxxxxxxxxxxx
> > you MUST email
> > TV-REQUEST@xxxxxxxxxxxxxxx with REMOVE as the
> > subject.
> > Sent VIA Tech Assist's email server-
> > tv@xxxxxxxxxxxxxxx
> > TV email Archives at:
> > http://www.circuitwork.com/archive/TV/
> >
> --------------------------------------------------------------------------
-----
> >
> >
>
>
>
>
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> --------------------------------------------------------------------------
-----
> To remove yourself DO NOT Email TV@xxxxxxxxxxxxxxx you MUST email
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> Sent VIA Tech Assist's email server- tv@xxxxxxxxxxxxxxx
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> --------------------------------------------------------------------------
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>
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To remove yourself DO NOT Email TV@xxxxxxxxxxxxxxx you MUST email
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