[TechAssist] Re: RCA CTC177BP2, questions about the pincushion capacitor

  • From: "Webster TV" <webstertv@xxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Tue, 6 Jul 2004 16:56:51 -0500

Kevin,

Also, I presume you've checked the Horiz. Driver Transformer for poor solder
connections, this is a well known cause of HOT failure in these sets.

                                     Dan Webster
                                     Webster's TV
                                     Shullsburg, Wi.
----- Original Message -----
From: "armando guerra" <birdie@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, July 06, 2004 4:07 PM
Subject: [TechAssist] Re: RCA CTC177BP2, questions about the pincushion
capacitor


> Not an rca expert  but do know that the cap will cause a pin problem.I
think the
> first hot was a bad one.Since the cap had a bulge in it,I would also
replace
> CR4403.I alway';s replace both for safety. Just my 2 cents worth.
> Mando
> Birdie's TV & Electronics
> Casa  Grande, AZ
>
> Kevin wrote:
>
> > Here is one for you RCA experts out there.  Set came in with shorted
> > HOT, D1885.  Replaced same with exact replacement that had lighter and
> > different white printing on the case of the transistor.  Set fired up
> > with HV and HOT instantly blew.  Replaced with C5297 and set came on
> > this time with washed out picture with retrace lines and severe
> > pincushion problem on the sides.  The picture also filled the screen
> > slowly from the sides, making it appear to have a voltage regulation
> > problem.  The width would also vary when the screen was adjusted.  Pin
> > one of the STK measured -40.3 volts, well within specs.  Not a voltage
> > regulation problem.  Found and replaced the pincushion capacitor, C4407,
> > a 47nF blue cap that was open and bulged.  All problems go away.
> > FLABBERGASTED.
> >
> > Now my question is two fold:  Would this one pincushion cap cause all
> > these problems including causing the HOT to short?  And could my
> > original HOT that I installed been a fake?
> >
> > I have a second RCA set (two in one day), a CTC187CN3 that had a shorted
> > HOT as well, a BUH517.  I found a bad connection on the same pincushion
> > cap (this time a 41nF cap).  The customer also complained about having
> > trouble getting the set to come on, and then when it did, the video
> > would go off and on.  So far it is working fine on my test bench with a
> > new BUH517 installed and the bad connection repaired.  Could this same
> > cap have caused these 3 problems as well?  Thanks for listening.
> >
> > Kevin Wilks
> > Kevin's TV & Video Repair
> > Penticton BC Canada
> > kevintv@xxxxxxx
> >
> >
>
> --------------------------------------------------------------------------
---
> > Lost Password:
> > http://www.tech-assist.org  and select "Login Problems?".
> > Email Archives:
> > //www.freelists.org/archives/techassist/
>
>
> --------------------------------------------------------------------------
---
> Lost Password:
> http://www.tech-assist.org  and select "Login Problems?".
> Email Archives:
> //www.freelists.org/archives/techassist/
>


-----------------------------------------------------------------------------
Lost Password:
http://www.tech-assist.org  and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/

Other related posts: