[TechAssist] Re: RCA CTC 140 GPR2631..Dead, front LED indicators are lit.
- From: "Terry H." <tvdoc@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 30 Jul 2003 06:28:23 -0500
Check CR4106 usually covered in glue next to the heatsink for the chopper. A
1n4148 works great. I've seen that cause instant shutdown to no start. It
may be CR4104 since it's been awhile, but it's a blue case diode.
The TV Shop
314C St. George St.
Gonzales, Tx 78629
830-672-7403
----- Original Message -----
From: "Al Gutz" <alg@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, July 29, 2003 9:45 PM
Subject: [TechAssist] Re: RCA CTC 140 GPR2631..Dead, front LED indicators
are lit.
> Jeff
> How about Q4100 (switching trans), any waveforms on it?
> U4100 is the switching regulator IC, output pulse should be on P6. 8.8V
> on
> P10 in stby mode, 13.8V on P7 in run mode. Have had the SW trans bab and
> also the IC, there are also a couple of diodes on the base cct of the SW
> trans. I have a manual but no scanner on this system, if you need a pic
> of the PS I can hook my other system to net and send to you.
>
> Al G
> Al's TV-Electronics
> Pembroke Ont.
> Canada
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> Intrepid Video Support wrote:
> >
> > This unit came in dead...I gave the customer a high estimate, hoping he
would turn the repair down...they
> > want it fixed, so I feel obligated to give it my best.
> > All four LED's on the front are lit as soon as AC applied, unit is
otherwise dead, no relay click.
> > Raw B+ is 160vdc, to high and no B+ to HOT.
> > 12V run is also missing. I have troubleshooting guide, but no actual
schematic on this thing.
> > I soldered the diode board..no luck and no voltages on it anyway.
> > Has anyone run into this problem before?
> > Thank you.
> >
> > 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
> >
> >
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