[TechAssist] Re: FIXED UPDATE Re: RCA PTK195M26A, P46921, convergence problems
- From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 22 Oct 2003 14:18:20 -0500
No autoconvergence.
Press to keep on pressing menu. Press and release power. Press vol up and
release it and the menu button.
To do the convergence ajustments you need one of the dog-bone syle RCA
remotes, the ones with the four arrow buttons and an OK button in the center
of them.
Display shows P and 0 and V and 0.
Vol up to 80.
Ch up once.
Vol and channel buttons move the cross hair, the four arrow buttons "drag"
the color, the INFO button changes colors.
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: Wednesday, October 22, 2003 1:44 PM
Subject: [TechAssist] Re: FIXED UPDATE Re: RCA PTK195M26A, P46921,
convergence problems
> New convergence P/S came in at 11:30 AM, set is now converging properly.
> Customer is leaving around 2 PM. It's nice when things work out (well
> sort of!). Does this set have auto convergence? 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 Kevin
> Sent: Tuesday, October 21, 2003 1:57 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: UPDATE Re: RCA PTK195M26A, P46921, convergence
> problems
>
> I disconnected all the convergence yokes and found that my convergence
> P/S powers up with all the proper voltages. When I connect the green
> convergence yoke the voltages drop 10-15% and the green tube is
> converged. But when I connect either of the blue or red convergence
> yokes (by themselves) the convergence P/S shuts down. It sounds like my
> convergence P/S is at fault. Does the green convergence circuit draw
> less current because it is fixed (static)? I can get the convergence
> P/S overnite but my customer is moving early tomorrow morning 3,000
> miles away. It would be nice to get this P/S repaired. TIA.
>
> 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 Kevin
> Sent: Monday, October 20, 2003 12:50 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
>
> Is that 215496 and 215495? The current condition is the voltages come
> up for a split second when I turn the set on, then they drop down to
> zero, except for the 23 volts which remains constant @ 22 volts and the
> +45 volt line which drops down to 20-25 volts. If I disconnect one yoke
> (hor and vert yoke) the voltages all stay up but the other 2 tubes do
> not come on (must be some kind of protection circuit). I just replaced
> both of the ECG587 diodes with ECG588--no luck, same symptoms. Can you
> tell me what the 15 volt diode NTE cross is? Maybe they are faulty.
> TIA
>
> 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: Monday, October 20, 2003 11:51 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
>
> Sometimes I overlook the obvious. I have seen bad connections on the
> electrolytics in the secondary...
>
> I work on enough of these that I have known good modules, I swap modules
> on
> service calls and then rebuild the old ones.
>
> Those smd transistors 215496 and 215496 (compliments) are notorious. I
> keep
> a bag of each on hand.
>
> Can you give a recap of the current condition?
>
> 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: Monday, October 20, 2003 1:24 PM
> Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
>
>
> > This set does have the red and green convergence yokes reversed. I
> > replaced all those parts except for Q19705 SMD, which tests good out
> of
> > circuit. More testing! 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: Monday, October 20, 2003 5:39 AM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
> >
> > OK, This "discussion" about this power supply was active on another
> list
> > on
> > Friday.
> > This is a good power supply to learn, you know how Thomson uses the
> same
> > circuits in many places and for many years.
> >
> > If any of these parts are bad, replace all of them, you will be saving
> > yourself time and money.
> > Q19701 pn 246967
> > Its source resistor! R19706 1.2 ohm 2w 250661
> > Q19702 147665
> > Q19703 232218
> > Q19704 229220
> > U19700 223653
> > U19701 231525 This is the voltage reference ic.
> > Q19705 smd 215946
> >
> > Check the following:
> > cr17903 off the base of smd q19705 8.2v if installed! It isn't always
> > there.
> > The FET base resistor, in this case R19703 15 ohms 1/2Watt. Note that
> > many
> > times this resistor will be blown up.
> >
> > Now, a possible cause for the failure,
> > In the secondary of the supply, CR19713 and CR19710m on the 45v supply
> > have
> > been upgraded do to failures. They may be leaky or shorted, and may
> > test
> > good.
> >
> > Old number 227066
> > New number 234048.
> > The serial numbers for the sets that require the new diodes are:
> > 145xxxxxx
> > b45xxxxxx
> > to 212xxxxxx
> > c12xxxxxx
> > A short detour. The first digit is the year, the next two are the
> week,
> > of
> > manufacture. 0=A 1=b In other words, any set made between the 45th
> week
> > of
> > 2001 and the 12th week of 2002. If the power supply had been replaced
> > previously....?
> >
> > The above parts are specific to this power supply. This basic power
> > supply,
> > with variation, is used in the ctc195, 197, 203, atc113 the mm series
> > and
> > some of the dtv and atc series sets, both to run the set or to run the
> > convergence modules.
> >
> > Although this does not apply to this particular set, note also that on
> > some
> > ctc195s the red and green yoke plugs are reveresed.
> >
> > 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: Monday, October 20, 2003 3:39 AM
> > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems
> >
> >
> > > More testing: If I disconnect any of the yoke connections the
> > > convergence P/S voltages all remain constant but the other two CRT's
> > > don't light up. Disconnecting any of the convergence yokes has no
> > > effect. I think my convergence P/S is fine, but what is making it
> > shut
> > > down? TIA
> > >
> > > 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 Kevin
> > > Sent: Sunday, October 19, 2003 10:33 PM
> > > To: techassist@xxxxxxxxxxxxx
> > > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence
> problems
> > >
> > > I have done more testing, and I found that all of the voltages come
> up
> > > to their proper values and then disappear after 2-3 seconds. Except
> > for
> > > the 23 volt line which remains on. I checked the convergence board
> > and
> > > found no shorts. Is the convergence P/S supposed to work without a
> > load
> > > connected? The voltages don't come up at all without a load.
> 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 Intrepid Video
> > > Support
> > > Sent: Sunday, October 19, 2003 7:47 PM
> > > To: techassist@xxxxxxxxxxxxx
> > > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence
> problems
> > >
> > > Kevin,
> > > >From Tech Repair CD:
> > > RCA\P52810LV PTK195AB\Convergence was pretty bad\Went into menu to
> > pull
> > > up cust. convergence and it wasn't
> > > there\\PTK195AB\R19703 was open on convergence power board(750K
> > > 1/2watt)\\\\\\\\
> > >
> > > RCA\PTK195\CONVERGENCE BAD* BOWED IN TOP AND BOTTOM* NO VOLTAGES
> > > J19701\\\\E-C SHORT ON Q19707(SMD) AMP ON
> > > CONV POWER 1 BD\\\\\\\\
> > >
> > > RCA\PTK195\Loss of convergence appearing as a pincushion defect
> along
> > > with no convergence menu
> > > item\\\\Q19338 (227406) on the convergence PCB\The power supply was
> > > actually shutting down due to
> > > excessive current\\\\\\\
> > >
> > >
> > >
> > > Jeff Dougherty
> > > Intrepid Video TV/VCR
> > > 263 S Front St
> > > Steelton PA 17113
> > > fax...717-564-4952
> > > www.intrepid-video.com www.tech-repair.net
> > >
> > > Chicago
> > > ----- 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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- » [TechAssist] Re: FIXED UPDATE Re: RCA PTK195M26A, P46921, convergence problems
