[TechAssist] Re: UPDATE-CTC203, DEAD- No start up
- From: "Edward Gaidies" <teltek2@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 19 Oct 2002 09:42:41 -0400
Here's a few tips on the CTC203..hope it helps.
-Ed-
Tel-Tek Electronics
Midland, Ontario
Canada.
teltek2@xxxxxxxxxxxx
----- Original Message -----
From: "David J. Williams" <djwilliams@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, October 18, 2002 10:55 PM
Subject: [TechAssist] Re: UPDATE-CTC203, DEAD- No start up
>
> One of our techs had a problem with a couple fo the new 203 chassis, where
> the voltages that were needed to run were not there, and nothing was
> apparantly shorted. Come to find out, it was the tuner on one, and a
stand
> up video board on the other. One thing to check is to un solder the
tuner,
> and if there is a plug in jack pack or video board, unplug it, and see if
> the set powers on. Just a thought!
>
> David
> Northway T.V. & Satellite inc.
> Goldsboro NC
> 9197781374
> djwilliams@xxxxxxxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Daryl Thunhurst
> Sent: Friday, October 18, 2002 8:39 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: UPDATE-CTC203, DEAD- No start up
>
>
>
> Jonas,
> Thanks for the information.
> I will try that value and see if it makes any difference.
> Daryl
> Daryl's TV
> 3310 Dyer St.
> El Paso, TX 79930
> 915-565-9184
> 915-564-1024 Fax
> http://dynacomp.freeyellow.com
>
> ---------- Original Message ----------------------------------
> From: "miglinasj" <miglinasj@xxxxxxxxx>
> Reply-To: techassist@xxxxxxxxxxxxx
> Date: Fri, 18 Oct 2002 18:23:08 -0500
>
> >
> > Hello Daryl,
> >
> > Partsfinder lists R14109 as 750 ohm on both CTC203CE1 or CTC203CX
> modules.
> >Maybe this is your problem. If it isn't, could it be possible that R14103
> >that you replaced is opening up under a load? I would change this again
and
> >hard wire the resistor to its next connection to sure.
> >
> > Jonas
> > Miglinas TV
> >----- Original Message -----
> >From: "D Thunhurst" <dthunhurst@xxxxxxx>
> >To: "techassist" <techassist@xxxxxxxxxxxxx>
> >Sent: Friday, October 18, 2002 5:12 PM
> >Subject: [TechAssist] UPDATE-CTC203, DEAD- No start up
> >
> >
> >>
> >> Update on this CTC203 set.
> >> I am still having the same problem with this dog.
> >> There is no start-up and no secondary voltages at all from the SMPS.
> >> I have replaced, using OEM parts, the following:
> >> r14103 1 meg (this was the first thing I found to be bad)
> >> As recommended, I replaced....
> >> q14101 244223
> >> q14102 147665
> >> q14103 232218
> >> u14101 223653
> >> u14102 231525
> >> The other parts recommended to check where found to be good.
> >> r14109 was mentioned to be 750 ohms but I found a 150k in its place and
> it
> >> does check good. It doesn't appear to have been tampered with, so I
> think
> >> it is original.
> >> It has been also suggested to change out the "Gemstar" module. This
set
> >> doesn't have it.
> >> I also have disconnected the collector of the HOT to see if sound is
> >> returned. No help there. The power supply to the HOT is still zero.
> >> At plug-in, I get a faint chirp that diminishes in volume for about two
> >> seconds.
> >> I have checked with a fine tooth comb, so to speak, for the possibility
> of
> >a
> >> fine crack in the board as well as for poor connections.....None found.
> >> At the bottom of this post is the original post on this set.
> >> Perhaps someone has some additional ideas to try or possibly a scan of
> the
> >> power supply would be a help.
> >> Again, thanks,
> >> Daryl
> >> PS
> >> The customer's patience is wearing a bit thin as I have had this set
for
> >> awhile (awaiting parts, etc.)
> >>
> >> Daryl's TV
> >> 3310 Dyer St.
> >> El Paso, TX 79930
> >> 915-565-9184
> >> 915-564-1024 Fax
> >> http://dynacomp.freeyellow.com
> >>
> >> -----Original Message-----
> >> From: Wayne Vanaman <Wayne@xxxxxxxxxxxxxxxxxxxxx>
> >> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
> >> Date: Thursday, September 26, 2002 3:08 PM
> >> Subject: [TechAssist] Re: CTC203, DEAD- No start up
> >>
> >>
> >> >
> >> >Don't cheat on the parts. If transistor q14101 OR q14102 OR q14103 OR
> >> >q14108 are bad replace all of them together
> >> >
> >> >r14107 244214 43ohms
> >> >r14109 179317 1/4w 750ohms 5%
> >> >r14108 244215 .1ohm 3W
> >> >q14101 244223
> >> >q14102 147665
> >> >q14103 232218
> >> >q14106 215495 smd, maybe bad
> >> >q14107 215495 smd, maybe bad
> >> >q14108 215496
> >> >u14101 223653
> >> >u14102 231525
> >> >
> >> >The failure was probably caused by u14102. This is a precision
> reference
> >> >IC. Although the opto-isolator is probably good for the buck it costs
> it
> >> >isn't worth the gamble. Also, very carefully check all of the pins on
> >the
> >> >switchmode transformer, ensuring that the traces are good.
> >> >
> >> >This power supply needs about 80vac to run. It is a frequency
modulated
> >> >regulator.
> >> >
> >> >Wayne Vanaman
> >> >Omega Electronics
> >> >6904 W Fairfield Dr
> >> >Pensacola, Fl. 32506-3310
> >> >
> >> >850-456-5995 voice
> >> >850-458-6369 fax
> >> >
> >> >Mailto:Wayne@xxxxxxxxxxxxxxxxxxxxx
> >> >WWW.PensacolaTVRepair.Com
> >> >
> >> >
> >> >----- Original Message -----
> >> >From: "D Thunhurst" <dthunhurst@xxxxxxx>
> >> >To: "techassist" <techassist@xxxxxxxxxxxxx>
> >> >Sent: Thursday, September 26, 2002 2:50 PM
> >> >Subject: [TechAssist] CTC203, DEAD- No start up
> >> >
> >> >
> >> >>
> >> >> Hi,
> >> >> I have a 36" RCA, F36665, chassis CTC203CE1 marked on the board and
> >> >CTC203CX
> >> >> marked on the back.
> >> >> I am quite sure it is a start up problem as there are no secondary
> >> >voltages
> >> >> at all. I do have 165 volts raw B+ to the drain of Q14101. I
> >originally
> >> >> could start the set by placing my meter on the gate of Q14101 and I
> >would
> >> >> get a small chirp of the power supply starting up. I then could
turn
> >the
> >> >> set on and everything worked until turned off. I checked everything
> in
> >> >the
> >> >> gate circuit of Q14101 and found R14103 (1 meg) wide open. I
replaced
> >> the
> >> >> resistor and now I can not get it to turn on at all. At plug in, I
> get
> >a
> >> >> faint diminishing chirp out of the power supply with 2.6 volts on
the
> >> >gate,
> >> >> 165 on the drain, and 0 on the source. Naturally I am not getting
my
> >140
> >> >> volts or 5 volts, etc. I re-checked the components in the chopper
> >> circuit
> >> >> and found nothing else bad.
> >> >> Any ideas?
> >> >> Thanks,
> >> >> Daryl
> >> >> Daryl's TV
> >> >> 3310 Dyer St.
> >> >> El Paso, TX 79930
> >> >> 915-565-9184
> >> >> 915-564-1024 Fax
> >> >> http://dynacomp.freeyellow.com
> >>
> >>
> >>
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