[TechAssist] Re: RCA PTK195M26A, P46921, convergence problems

From: <tvservice@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Date: Mon, 20 Oct 2003 13:57:02 -0500
On the 2 I had C19706 measured around 600-800 ohms
removed scraped board and replaced caps fixed.
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
Dallas, TX
----- Original Message ----- 
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, October 20, 2003 1:17 PM
Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems


> I replaced all but CR19713, but it tested good out of circuit.  I was
> going to replace it anyways, but my supplier only had 1 ECG587.  I will
> find a used one and see if that fixes my problem.  How can I test C19706
> for leakiness?  Thanks.
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of
> tvservice@xxxxxxxxxxxxx
> Sent: Monday, October 20, 2003 7:18 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
>
> Did you replace all these listed parts?
> Q19701      246967 / P4NB50FP
> Q19702      147665 / NTE159
> Q19703      232218
> Q19704      229220 / NTE123AP / 2N3904 / BC547
> U19701      231525 / NTE999
> CR19701   198589 / NTE519
> R19703      241313 / 15 ohm 1/2 w
> CR19710   234048 / MUR115 / NTE587
> CR19713   234048 / MUR115 / NTE587
> F14201      175425 / GMA 5A
>
> if so and still having problems but not blowing line fuse check C19706
> leaky
> replace with 239176 820pf surface mount cap
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
> Dallas, TX
>
> ----- Original Message ----- 
> From: "Kevin" <kevintv@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, October 19, 2003 7:35 PM
> Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
>
>
> > I checked the voltages and the convergence power supply is not
> working!
> > I changed 7 parts but must have missed one.  The -45V, -15V are
> missing;
> > and the 45v line is 25v and drops as I measure it, and the 23v and 15v
> > are missing.  Do you have a schematic for the new improved convergence
> > P/S?
> > This P/S has the fet and 4 small driver transistors.  Thanks.
> >
> > Kevin Wilks
> > Kevin's TV & Video Repair
> > Penticton BC Canada
> > kevintv@xxxxxxx
> >
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Wayne Vanaman
> > Sent: Sunday, October 19, 2003 12:53 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
> >
> > If there are no convergence options on the users menu it means that
> the
> > convergence IC is not talking to the main IC.  This would happen on
> plug
> > in.
> > The thing thinks it is a direct view tv.
> >
> > What you need to do is
> > a. check for +- 15 and 40something on the diodes of the secondary, so
> > that
> > you know the power supply is working.
> > 2. ensure that the convergence ic has power supply, the coils I
> > mentioned.
> > III.ensure a "line of communication" between the convergence IC and
> the
> > main
> > ic.  That is, see if there is data activity at the convergence IC at
> > plug
> > in.
> >
> >
> > Wayne Vanaman
> > Omega Electronics
> > 6904 W Fairfield Dr
> > Pensacola, Fl.  32506-3310
> >
> > Wayne@xxxxxxxxxxxxxxxxxxxxx
> > WWW.PensacolaTVRepair.Com
> >
> > 850-456-5995 voice
> > 850-458-6369 fax
> >
> >
> > ----- Original Message ----- 
> > From: "Kevin" <kevintv@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Sunday, October 19, 2003 2:31 PM
> > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
> >
> >
> > > Hi Wayne,
> > >
> > > No, I could not find the convergence adjust menu options in the
> users'
> > > menu.  I also noticed that the heat sinks on the convergence board
> are
> > > remaining cold when I leave the set on for 30 minutes.  I am going
> to
> > > measure the voltages coming out of the convergence P/S as a start.
> > Off
> > > hand do you know what they are supposed to be?  Thanks.
> > >
> > > Kevin Wilks
> > > Kevin's TV & Video Repair
> > > Penticton BC Canada
> > > kevintv@xxxxxxx
> > >
> > >
> > > -----Original Message-----
> > > From: techassist-bounce@xxxxxxxxxxxxx
> > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Wayne Vanaman
> > > Sent: Sunday, October 19, 2003 4:16 AM
> > > To: techassist@xxxxxxxxxxxxx
> > > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence
> problems
> > >
> > > Hi Kevin.
> > >
> > > Pull the shields off of the control area on the convergence board
> and
> > > see if
> > > that takes care of it.  (Don';t leave them off, of course.)  There
> was
> > > an
> > > "issue" with shield covers touch traces/parts causing problems.
> > >
> > > Of course there could be a defective power transistor, but I have
> seen
> > a
> > > few
> > > with open filter coils, again, under the shield covers.  Do you get
> > the
> > > convergence adjust ment options ("Adjust Projection TV") in the
> users
> > > menu?
> > >
> > > Wayne Vanaman
> > > Omega Electronics
> > > 6904 W Fairfield Dr
> > > Pensacola, Fl.  32506-3310
> > >
> > > Wayne@xxxxxxxxxxxxxxxxxxxxx
> > > WWW.PensacolaTVRepair.Com
> > >
> > > 850-456-5995 voice
> > > 850-458-6369 fax
> > >
> > >
> > > ----- Original Message ----- 
> > > From: "Kevin" <kevintv@xxxxxxx>
> > > To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx>
> > > Sent: Saturday, October 18, 2003 9:02 PM
> > > Subject: [TechAssist] RCA PTK195M26A, P46921, convergence problems
> > >
> > >
> > > > Original problem was open 5amp main fuse caused by bad convergence
> > P/S
> > > > board.  Replaced numerous parts in P/S (the newer design without
> the
> > > > STK's) and now the set fires up but the convergence is way off.
> Top
> > > and
> > > > bottom is pin cushioned for each gun.  Any help would be
> appreciated
> > > as
> > > > the customer is moving on Tuesday morning and he lives 30 miles
> > away.
> > > > TIA.
> > > >
> > > > Kevin Wilks
> > > > Kevin's TV & Video Repair
> > > > Penticton BC Canada
> > > > kevintv@xxxxxxx
> > > >
> > > >
> > > >
> > > >
> > >
> >
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References:
- [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
  - From: Kevin
[TechAssist] Re: RCA PTK195M26A, P46921, convergence problems

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