[TechAssist] Fixed : RCA CTC203 F2PIP Module Failures
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: "Tech Assist" <techassist@xxxxxxxxxxxxx>
- Date: Tue, 10 Aug 2004 12:50:09 -0400
This is the fix as entered in Winstips : Original thread below
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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RCA CTC203CH3
Shuts down on power up : Set would Build HV for a second then shutdown and
repeat 5 times
Jeff Stielau : 8/10/04 : Shoreline Electronics
On the F2PIP Module , U18101 ( LM317T) 3.3V regulator had 12V in on input
pin 3 (good) but 1.2V on output pin 2 (no good). Changing the LM317T did
not help.
Problem turned out to loose solder connection chip resistor R18127 between
pins 2 & 1. This resistor is part of the critical values that keep the
LM317T regulating at 3.3V
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=================================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
(860)399-1861
(860)664-3535 FAX
jstielau@xxxxxxxx
=================================
----- Original Message -----
From: "Shoreline Electronics" <jstielau@xxxxxxxx>
To: "TV Repair Group" <tv-repair@xxxxxxxxxxxxxxx>
Sent: Monday, August 09, 2004 12:43 PM
Subject: RCA CTC203 F2PIP Module Failures
> Make : RCA
> Model : F32665
> Chassis : CTC203CH3
>
> Problem : Shuts down on power up.
>
> Traced problem to the F2PIP module.
>
> IC U18101 ( LM317T) in the 3.3V regulator circuit is only putting out 1.2V
> on pin 2
>
> Tried a new IC , no change. Something seems to be loading down the 3.3V
> line..........although resistance reading to ground is not low at all ,
> almost 1 meg.
>
> By cutting a few supply feed traces I can get the 3.3V line to come up.
>
> I did pull the main PIP processor IC and still have the low voltage.
>
> Has anyone seen a common fault on these F2PIP board?
>
>
> These boards appear to be on back order for the time being
>
> =================================
> Jeff Stielau
> Shoreline Electronics Repair
> 344 East Main Street
> Clinton,CT 06413
> (860)399-1861
> (860)664-3535 FAX
> jstielau@xxxxxxxx
> =================================
>
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