[TechAssist] Re: Magnavox TV/VCR CCR132AT02, vertical linearity problem

Ken,
Look at pin 8 of the vertical IC(LA7837). I have found a bad zener(which is 
not marked on the diagram) on two CCR095s that caused bad vertical. The 
zener is an ECG5024. Maybe this will help.
Paul W.


From: gulftech@xxxxxxxx
Reply-To: techassist@xxxxxxxxxxxxx
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Magnavox TV/VCR CCR132AT02, vertical linearity 
problem
Date: Fri, 30 Nov 2001 12:10:34 -0600


Jeff,
Thanks.  I had already replaced C6 along with C4 & C14.  Bridged R6 with
1K resistor.  Set better, but still slightly stretched at top.  Am trying
to decide whether to ship it or replace the 1K with a trimpot.

It makes me nervous in modifying a circuit.  I just feel like I missed
the real problem and must compensate.  Everybody, please understand, this
is not directed at Jeff.  He's a friend and has provided help to me and
most all of you, but it is rare that we must re-engineer a circuit.


Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL  32561
850-934-8324 (Voice) 850-932-0819 (Fax)

-----------------

On Thu, 29 Nov 2001 23:47:04 -0500 "Jeff Dougherty"
<jeff@xxxxxxxxxxxxxxxxxx> writes:
 >
 > Ken
 > From Tech Repair CD:
 > VERTICAL COMPRESSED AT BOTTOM- STRETCHED AT TOP.
 > C06(1/50V)- JUMP R06 W/ 1K RESISTOR. MAY HAVE TO TRY DIFFERENT VALUES
 > Good luck.
 > Jeff
 > mailto:Jeff@xxxxxxxxxxxxxxxxxx  www.9-11-2001tragedy.com
 > FAX 1-413-280-0677
 > Intrepid Video & Electronics
 > Harrisburg, PA 17111
 > 717-909-8844
 > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
 > ----- Original Message -----
 > From: <gulftech@xxxxxxxx>
 > To: <techassist@xxxxxxxxxxxxx>
 > Sent: Thursday, November 29, 2001 7:58 PM
 > Subject: [TechAssist] Magnavox TV/VCR CCR132AT02, vertical linearity
 > problem
 >
 >
 > >
 > > Friends,
 > >
 > > This unit came in dead.  Found about a half dozen caps in smps bad.
 > > Replacement restored power,  but lacked about 1 inch to fill out on
 > > bottom of screen.  Can adjust vertical height to fill screen, but
 > then
 > > stretched at top.  Have checked and rechecked the caps in the
 > vertical
 > > area and then changed them.  Replaced the LA7837, too.
 > >
 > > Almost must be a cap, but it is hiding in some obscure place.
 > >
 > > BTW, in case it helps someone with a similar set with no power and
 > no
 > > fuses blown, I replaced C7 (220@xxx), C9 (4.7@160), C12 (4.7@250),
 > C18
 > > (1@160), and C23 (1000@16).
 > >
 > > Would appreciate any help.  This set is similar to Symphonic
 > TVCR1361,
 > > Funai TVCR13T, and Zenith SLV1340S.
 > >
 > > Thanks,
 > >
 > >
 > > Ken Smith
 > > Gulf Technical Services
 > > 3034 Gulf Breeze Parkway
 > > Gulf Breeze, FL  32561
 > > 850-934-8324 (Voice) 850-932-0819 (Fax)
 > >
 > > ________________________________________________________________
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