[TechAssist] Re: RCA D52W20, ITC222, Convergence power supply problem

From: "Damon" <damoneb@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Date: Sat, 23 Jul 2005 15:26:21 -0500
Ohhhhhh........you tried to contact RCA tech assist hotline didn't you?
I think the PAY numbers still have Real American Techs that can Really
Troubleshoot!
THE MOMENT I hear "huh RO.....how do you go.....wat iz model number? wat is
silial number? I'll have to hang up.
Won't pay for that.......

Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message ----- 
From: <daryls_tv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, July 23, 2005 9:44 AM
Subject: [TechAssist] Re: RCA D52W20, ITC222, Convergence power supply
problem


> Damon,
> Thanks for your efforts.
> Besides going to have to learn to speak Chinese, it looks like we are
going=
>  have to learn to speak the Hindu language. :-)
> Daryl
> Daryl's TV
> 2402 Wyoming Ave.
> El Paso, TX  79903
> 915-565-9184 Voice/Fax
> daryls_tv@xxxxxxx
> www.angelfire.com/tv2/daryls_tv
>
>
> ----- Original Message -----
> From: Damon <damoneb@xxxxxxxxxxx>
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA D52W20, ITC222, Convergence power supply
prob=
> lem
> Date: Sat, 23 Jul 2005 06:31:40 -0500
>
> >=20
> > Daryl I'd offer you a copy of the power supply for that....BUT
> > I just tried printing....1/2 of the schematic popped out
> > 2 page printing.....2 white pages popped out.
> > Copy and paste....that's magnify and move operations in the RCA
schematic
> > program.
> >=20
> > I know there's a software engineer over there named Simon Bar Sinister,
> > Mouhaha-ing all the way to the bank after developing those print
> > drivers.....sorry, can't help you with a SCHEMATIC.
> > Maybe someone else??? (At least I'd know my program load was a bad load
> > then....)
> >=20
> > Damon B
> > Telrad Electronics
> > Fort Wayne IN
> > ----- Original Message -----
> > From: <daryls_tv@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Saturday, July 23, 2005 12:20 AM
> > Subject: [TechAssist] Re: RCA D52W20, ITC222, Convergence power supply
> > problem
> >=20
> >=20
> > > No... I don't have any schematics on this set.
> > > I think I may have found the problem.  I have absolutly no resistance
> > readi=3D
> > > ngs between pins 3 & 4 of the opt-coupler, even on high meg scale.
> > > I will post the results when the part comes in.
> > > Thanks,
> > > Daryl
> > > Daryl's TV
> > > 2402 Wyoming Ave.
> > > El Paso, TX  79903
> > > 915-565-9184 Voice/Fax
> > > daryls_tv@xxxxxxx
> > > www.angelfire.com/tv2/daryls_tv
> > >
> > > ----- Original Message -----
> > > From: Damon <damoneb@xxxxxxxxxxx>
> > > To: techassist@xxxxxxxxxxxxx
> > > Subject: [TechAssist] Re: RCA D52W20, ITC222, Convergence power supply
> > prob=3D
> > > lem
> > > Date: Fri, 22 Jul 2005 22:20:41 -0500
> > >
> > > >=3D20
> > > > Do you have schematics? If so, one of the transistors driving or
being
> > > > driven by the optoisolator can be jumpered (screwdriver) and maybe
the
> > un=3D
> > > it
> > > > will start, I'm pretty sure that if that's the case, replacement of
t=
> he
> > > > board will save you some time/money.
> > > >=3D20
> > > > Damon B
> > > > Telrad Electronics
> > > > Fort Wayne IN
> > > > ----- Original Message -----
> > > > From: <daryls_tv@xxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Friday, July 22, 2005 1:10 PM
> > > > Subject: [TechAssist] Re: RCA D52W20, ITC222, Convergence power
supply
> > > > problem
> > > >=3D20
> > > >=3D20
> > > > > After re-checking the power supply, I discovered that the chopper
is
> > not
> > > > os=3D3D
> > > > > cillating.  I guess I was in a hurry and used the wrong ground as
> > > > reference.
> > > > > I rechecked every component on the primary side and still not
findi=
> ng
> > > > anyth=3D3D
> > > > > ing bad.
> > > > > I thought I would sub another chopper into it but I couldn't find
a=
> ny
> > > > cross=3D3D
> > > > >  for it.  I hate to order one and wait several days only find out
t=
> hat
> > =3D
> > > may
> > > > =3D3D
> > > > > not be it.
> > > > > Daryl=3D3D20
> > > > > Daryl's TV
> > > > > 2402 Wyoming Ave.
> > > > > El Paso, TX  79903
> > > > > 915-565-9184 Voice/Fax
> > > > > daryls_tv@xxxxxxx
> > > > > www.angelfire.com/tv2/daryls_tv
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: Damon <damoneb@xxxxxxxxxxx>
> > > > > To: techassist@xxxxxxxxxxxxx
> > > > > Subject: [TechAssist] Re: RCA D52W20, ITC222, Convergence power
sup=
> ply
> > > > prob=3D3D
> > > > > lem
> > > > > Date: Fri, 22 Jul 2005 08:00:20 -0500
> > > > >
> > > > > >=3D3D20
> > > > > > Daryl,
> > > > > > I have yet to see a defective convergence power supply on the
ITC
> > 222,
> > > > > > HOWEVER.....
> > > > > > The CTC 195/197 series has had intermittant conv power shutdown,
=
> and
> > =3D
> > > the
> > > > > > board cost was cheap enough to just replace it entirely. It
might=
>  be
> > =3D
> > > the
> > > > =3D3D
> > > > > way
> > > > > > to go on this unit.
> > > > > >=3D3D20
> > > > > > On the boards I worked on, I was able to eventually see it fail,
> > then=3D
> > >  by
> > > > > > jumpering  two leads on the primary side I was able to restart
it
> > and
> > > > ver=3D3D
> > > > > ify
> > > > > > it was the smps, and it was not a "shorting" type of failure.
The
> > > > oscilla=3D3D
> > > > > tor
> > > > > > just quits oscillating for no good reason. But in your case
> > oscillati=3D
> > > on
> > > > > > isn't the issue, tranferring power to the secondary is......does
=
> the
> > > > final
> > > > > > output drive the transformer at all?
> > > > > >=3D3D20
> > > > > > Damon B
> > > > > > Telrad Electronics
> > > > > > Fort Wayne IN
> > > > > > ----- Original Message -----
> > > > > > From: <daryls_tv@xxxxxxx>
> > > > > > To: <TechAssist@xxxxxxxxxxxxx>
> > > > > > Sent: Thursday, July 21, 2005 6:18 PM
> > > > > > Subject: [TechAssist] RCA D52W20, ITC222, Convergence power
supply
> > > > problem
> > > > > >=3D3D20
> > > > > >=3D3D20
> > > > > > > RCA D52W20, ITC222, Convergence power supply problem
> > > > > > >
> > > > > > > Another looser here.
> > > > > > > Customer claims they changed channels and lost the
convergence.
> > > > > > > What I found is no control of convergence and a distorted
pictu=
> re.
> > > > > > > There are no voltages out of the convergence power supply on
the
> > > > > > secondarie=3D3D3D
> > > > > > > s.
> > > > > > > I do have power on the primary of the smps and does appear to
be
> > > > > > oscillatin=3D3D3D
> > > > > > > g.
> > > > > > > I checked all of the semi's, resistors and electro's. I ohmed
o=
> ut
> > t=3D
> > > he
> > > > > > switc=3D3D3D
> > > > > > > h mode power transformer. I didn't find any bad components.
> > > > > > > I hope someone has encountered this before and can give a few
> > > > pointers.
> > > > > > > Thanks,
> > > > > > > Daryl
> > > > > > > Daryl's TV
> > > > > > > 2402 Wyoming Ave.
> > > > > > > El Paso, TX  79903
> > > > > > > 915-565-9184 Voice/Fax
> > > > > > > daryls_tv@xxxxxxx
> > > > > > > www.angelfire.com/tv2/daryls_tv
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --=3D3D3D20
> > > > > > > ___________________________________________________________
> > > > > > > Sign-up for Ads Free at Mail.com
> > > > > > > http://promo.mail.com/adsfreejump.htm
> > > > > > >
> > > > > >
> > > >
> >
> -----------------------------------------------------------------------=
> =3D
> > > =3D3D
> > > > > ---
> > > > > > ---
> > > > > > > This Email List is Public. Remove:
> > > > http://www.tech-assist.org/remove.htm
> > > > > > > Set Vacation
> > > > > >
mailto:ecartis@xxxxxxxxxxxxx?subject=3D3D3Dset%20techassist%20vac=
> ation
> > > > > > > Lost Password: http://www.tech-assist.org  and select "Login
> > > > Problems?".
> > > > > > > Email Archives: //www.freelists.org/archives/techassist/
> > > > > > >
> > > > > >=3D3D20
> > > > > >=3D3D20
> > > > >
> > > >
> >
> -----------------------------------------------------------------------=
> =3D
> > > --=3D3D
> > > > > ----
> > > > > > This Email List is Public. Remove:
> > http://www.tech-assist.org/remove.=3D
> > > htm
> > > > > > Set Vacation
> > > >
mailto:ecartis@xxxxxxxxxxxxx?subject=3D3D3Dset%20techassist%20va=3D3D
> > > > > cation
> > > > > > Lost Password: http://www.tech-assist.org  and select "Login
> > Problems=3D
> > > ?".
> > > > > > Email Archives: //www.freelists.org/archives/techassist/
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > --=3D3D20
> > > > > ___________________________________________________________
> > > > > Sign-up for Ads Free at Mail.com
> > > > > http://promo.mail.com/adsfreejump.htm
> > > > >
> > > >
> >
> -----------------------------------------------------------------------=
> =3D
> > > ---
> > > > ---
> > > > > This Email List is Public. Remove:
> > http://www.tech-assist.org/remove.htm
> > > > > Set Vacation
> > > > mailto:ecartis@xxxxxxxxxxxxx?subject=3D3Dset%20techassist%20vacation
> > > > > Lost Password: http://www.tech-assist.org  and select "Login
> > Problems?".
> > > > > Email Archives: //www.freelists.org/archives/techassist/
> > > > >
> > > >=3D20
> > > >=3D20
> > >
> >
> -----------------------------------------------------------------------=
> --=3D
> > > ----
> > > > This Email List is Public. Remove:
http://www.tech-assist.org/remove.=
> htm
> > > > Set Vacation
> > mailto:ecartis@xxxxxxxxxxxxx?subject=3D3Dset%20techassist%20va=3D
> > > cation
> > > > Lost Password: http://www.tech-assist.org  and select "Login
Problems=
> ?".
> > > > Email Archives: //www.freelists.org/archives/techassist/
> > >
> > >
> > >
> > >
> > >
> > >
> > > --=3D20
> > > ___________________________________________________________
> > > Sign-up for Ads Free at Mail.com
> > > http://promo.mail.com/adsfreejump.htm
> > >
> >
> -----------------------------------------------------------------------=
> ---
> > ---
> > > This Email List is Public. Remove:
http://www.tech-assist.org/remove.htm
> > > Set Vacation
> > mailto:ecartis@xxxxxxxxxxxxx?subject=3Dset%20techassist%20vacation
> > > Lost Password: http://www.tech-assist.org  and select "Login
Problems?".
> > > Email Archives: //www.freelists.org/archives/techassist/
> > >
> >=20
> >=20
>
> -------------------------------------------------------------------------=
> ----
> > This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
> > Set Vacation
mailto:ecartis@xxxxxxxxxxxxx?subject=3Dset%20techassist%20va=
> cation
> > Lost Password: http://www.tech-assist.org  and select "Login Problems?".
> > Email Archives: //www.freelists.org/archives/techassist/
>
>
>
>
>
> --=20
> ___________________________________________________________
> Sign-up for Ads Free at Mail.com
> http://promo.mail.com/adsfreejump.htm
>
> --------------------------------------------------------------------------
---
> This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
> Set Vacation
mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> Lost Password: http://www.tech-assist.org  and select "Login Problems?".
> Email Archives: //www.freelists.org/archives/techassist/
>


-----------------------------------------------------------------------------
This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org  and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
References:
- [TechAssist] Re: RCA D52W20, ITC222, Convergence power supply problem
  - From: daryls_tv
[TechAssist] Re: RCA D52W20, ITC222, Convergence power supply problem

Other related posts:
