[TechAssist] Re: RCA F27201GG (CTC 169CAQS) VERT DEFLECTION?
- From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 26 Mar 2004 12:30:03 -0500
Follow up, I did get into this chassis again but had no luck. Luminance
buffer Q2906(pnp) was OK. I changed any way. This was the emitter follower
of the -Y buffer Q2911.
Put set back together.
Bruce.
----- Original Message -----
From: "Keith Trumbla" <keith@xxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, March 25, 2004 6:03 PM
Subject: [TechAssist] Re: RCA F27201GG (CTC 169CAQS) VERT DEFLECTION?
> I had something like that a while back. The PNP emitter follower was
shorted
> causing the video to be driven when it was actually supposed to be
blanked,
> causing you to be able to see vertical collapse during initial power up
and
> degauss.
> I am sorry, I don't remember the location but it's your luma driver/buffer
> HTH
> Keith Trumbla
> BEMelectronics.com
> Suite 212-530 Century St.
> Winnipeg Canada
> R3H 0Y4
> Ph.204.775.2875 Fax.204.774-9192
> ----- Original Message -----
> From: "Ed Gaidies" <teltek3@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, March 25, 2004 3:36 PM
> Subject: [TechAssist] Re: RCA F27201GG (CTC 169CAQS) VERT DEFLECTION?
>
>
> > Pretty sure that's normal on those sets, vertical sweep is suppressed
till
> > degaussing has finished. Depending on your screen setting if and how
much
> > it's visible.
> >
> > -Ed-
> >
> >
> >
> > Tel-Tek Electronics
> > Ontario-Canada
> >
> > teltek3@xxxxxxxxxxxx
> > ----- Original Message -----
> > From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, March 25, 2004 2:01 PM
> > Subject: [TechAssist] Re: RCA F27201GG (CTC 169CAQS) VERT DEFLECTION?
> >
> >
> > > Al when the set is first turned on look at the screen and see if you
see
> a
> > > faint vert (deflection) line about 1\4' high before the picture comes
> in?
> > > Did the customer send this back for this type of a problem? It does
not
> > > affect picture once it is on.
> > >
> > > Bruce.
> > > ----- Original Message -----
> > > From: "al m" <ampm@xxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Thursday, March 25, 2004 1:07 PM
> > > Subject: [TechAssist] Re: RCA F27201GG (CTC 169CAQS) VERT DEFLECTION?
> > >
> > >
> > > > I got the same problem here. I haven't seen the problem yet.
Customer
> > says
> > > > it only happens when they turn it on. Original problem was picture
was
> > > > stretched and the line when turned on. Caps in the vertical section
> > fixed
> > > > that.
> > > > Went over the regulator and changed CR4118 and the thing went out.
> Came
> > > back
> > > > 2 weeks later with this line thing??????? I thought I had it fixed
> when
> > > the
> > > > picture came up OK. Never have seen the line.
> > > > Al Marquardt
> > > > ampm@xxxxxxx
> > > > Al Marquardt Electronic Repair
> > > > 206 W Main
> > > > Girardville Pa. 17935
> > > > ----- Original Message -----
> > > > From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Thursday, March 25, 2004 12:17 PM
> > > > Subject: [TechAssist] Re: RCA F27201GG (CTC 169CAQS) VERT
DEFLECTION?
> > > >
> > > >
> > > > > Normal operation.
> > > > > Vertical is blanked during degauss.
> > > > > If this is a "problem" turn the main screen down a lttle.
> > > > >
> > > > > 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: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Thursday, March 25, 2004 10:17 AM
> > > > > Subject: [TechAssist] RCA F27201GG (CTC 169CAQS) VERT DEFLECTION?
> > > > >
> > > > >
> > > > > > "Momentary no vert deflection then OK". At start up.
> > > > > > I hope some one can shed some light on this problem, At turn on
> you
> > > see
> > > > a
> > > > > > collapsed vert deflection (about 1\4" deflection) then I hear
the
> > > relay
> > > > > > click an the set comes on full deflection as the CRT heaters
> lights
> > up
> > > > the
> > > > > > tube. The regulation is good around 143 volts similar in
standby.
> > > > > > I did change the cr4118, Q4402 and Q4202. Soldered all board
> > > connections
> > > > > in
> > > > > > Vet circuit. Replaced C403K.
> > > > > > I am starting to go around in circles on this set. Trying to
> figure
> > > out
> > > > > the
> > > > > > theory of operation. I am working off of a CTC169 print but has
> > > > different
> > > > > > parts than shown in data base. U4501 the vert drive switch shows
a
> > > drive
> > > > > > pulse OK at turn on.
> > > > > > . Sorry if my explanation is vague. I also changed the
degaussing
> > > switch
> > > > > > transistor!
> > > > > > As soon as I hit the tack switch the vert line shows up, then
the
> > > relay
> > > > > > sounds and the picture comes in ?
> > > > > > I don't want to send out this set as is. The original condition
> was
> > > > > > regulator problem which has been repaired , then I noticed this.
> > > Should
> > > > > not
> > > > > > see any kind of visible deflection this soon at turn on?
> > > > > >
> > > > > > Bruce.
> > > > > >
> > > > > > B&T Electronics
> > > > > > 139 Margaret St
> > > > > > Sarnia Ontario
> > > > > > Canada
> > > > > > N7T 2Y3
> > > > > > 519 344 1850
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
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