[TechAssist] Re: CTC203AA5 F27338
- From: "Barry Thompson" <barrystv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 8 Dec 2003 22:51:23 -0500
Thanks AL I am downloading aa5 now from sams free sample. I am getting B+
130 volts when I remove Q14902 in the shut down circuit it is ok.I am going
to change the resisters and the zener in that circuit.Thanks
barrystv@xxxxxxx
Barrys TV
613 224 3406
Ottawa.Canada.
----- Original Message -----
From: "Al Gutz" <alg@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, December 08, 2003 10:27 PM
Subject: [TechAssist] Re: CTC203AA5 F27338
> Barry
> Will send you a picture of the xray cct.
>
> What is the B+ going to the collector of the HOT?
>
> Al G
>
> Barry Thompson wrote:
> >
> > Replaced Q!4902 SM Same thing. Removed it and the sets ok.I am using a
> > ctc203ax1 schematic and the shutdown circuit is a little differant.I
beleive
> > there is only 2 resisters, 1 zener and 1 pnp sm transister. could
someone
> > send me the values of these.Thanks Barry
> > barrystv@xxxxxxx
> > Barrys TV
> > 613 224 3406
> > Ottawa.Canada.
> > ----- Original Message -----
> > From: <tvservice@xxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, December 08, 2003 4:21 PM
> > Subject: [TechAssist] Re: CTC203AA5 F27338
> >
> > > I have used cTC187 crts and yokes on some CTC203 chassis without
shutdown
> > > problems, however it is possible.
> > > check this:
> > >
> > > ----CTC203 F32669
> > > Shutdown cycles off/on.
> > > Defeat shutdown by removing CR14901 MAY NOT stop cycling off/on
> > > Replace leaky shutdown transistor Q14901 or Q14902- Original
Message -----
> > >
> > > Robert
> > > tvservice@xxxxxxxxxxxxx
> > > H & H Electronics Inc
> > > Dallas, TX
> > >
> > > From: "Barry Thompson" <barrystv@xxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Monday, December 08, 2003 11:55 AM
> > > Subject: [TechAssist] CTC203AA5 F27338
> > >
> > >
> > > > Hi All: I need some opinions on this set.I replaced shorted HOT and
> > > > resoldered L14401.This set now comes on with raster and shuts down
and
> > > > resets and comes back again and again. Using the chipper checker I
get
> > xrp
> > > > shutdown errors.I have checked all the components in the xrp
shutdown
> > > > circuit.I am using crt from a ctc 187 for my bench jig which I have
used
> > > > with other 27" ctc203aa5(with different model numbers) with
> > success.could
> > > it
> > > > be the mismatch yoke causing the problem.Thanks Barry
> > > > barrystv@xxxxxxx
> > > > Barrys TV
> > > > 613 224 3406
> > > > Ottawa.Canada.
> > > >
> > > >
> > >
> >
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