[TechAssist] Re: Zenith SS8769H2, 9-840-1, 9-822-1 no power, FIXED

From: Kevin <kevinstv@xxxxxxx>
To: techassist@xxxxxxxxxxxxx
Date: Thu, 21 Nov 2002 12:11:11 -0800
The Sencore list is very handy.  I have compared it to the list on the
Dick Smith ESR meter and have found that if you multiply the results
from that list by 10 times you get approximately the Sencore list
values.  As a rule of thumb, if a cap shows an ESR of 5 times greater
than the Dick Smith list, then the cap should be replaced.

Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevinstv@xxxxxxx 

-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Rich Bateman
Sent: Thursday, November 21, 2002 5:11 AM
To: 'techassist@xxxxxxxxxxxxx'
Subject: [TechAssist] Re: Zenith SS8769H2, 9-840-1, 9-822-1 no power,
FIXED


Leonard:
    If I read your post correctly you said that you have a chart of esr
readings for various caps.  This place would never allow me the money to
by
Sencore products but it would help me quite a bit if I could get a copy
of
this chart.  Is this chart something that can be purchased through
Sencore
or do they only supply it to their customers?

Thanks,
Rich

Richard J. Bateman, CET, CA. 
Electronics Program Area Coordinator
Amherst Campus 
716-691-0012  EXT - 232
E-MAIL  rjbateman@xxxxxxxxxxxxxxxxxx



-----Original Message-----
From: Leonard G. Caillouet [mailto:lcaillo@xxxxxxxxxxxx]
Sent: Wednesday, November 20, 2002 5:52 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Zenith SS8769H2, 9-840-1, 9-822-1 no power,
FIXED



Thanks Bob, you were right on.  I found one cap C3407 100uF 25V in the
primary of the power supply that had slightly high ESR (6 ohm) and
marginal
DA (11%).  I resoldered a number of connections, though none really
looked
bad and now it works.

I would not have thought that the ESR reading was all that bad but
checking
the Sencore chart it is too high for this value cap.

Leonard G. Caillouet
Service Manager
Electronics World
Gainesville, FL
352-332-5608
352-332-5668 (fax)

----- Original Message -----
From: "Bob@Bobs tv" <woodman1@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, November 20, 2002 3:45 PM
Subject: [TechAssist] Re: Zenith SS8769H2, 9-840-1, 9-822-1 no power


>
> Len,
>      Remove sweep module 9-822 and check for loose connections and ESR
caps
> in the power supply. You may also want to do search as this is a C3
chassis.
> Hope this helps
> Bob,
>
> Bobs TV   Worcester, ma
>
> woodman1@xxxxxxxx
>
> Main  508-853-1482
> Fax    508-853-1480
> ----- Original Message -----
> From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, November 20, 2002 3:14 PM
> Subject: [TechAssist] Zenith SS8769H2, 9-840-1, 9-822-1 no power
>
>
> >
> > Any of you zenith experts have some tips on this one?  I have no
manual
> (NLA
> > from Zenith) and no experience with this set.  The set will not
power
up.
> > Relay clicks twice.  Power supply has output on secondary, 135v at
HOT
> > collector.  FBT tests good, nothing happens at HOT except slight
drop in
> dc
> > at collector when it tries to turn on.  No drive signal at all
appears.
> > Micro is powered and it does respond to power button.
> >
> > power/deflection module is 9-840-1
> > control/video module is 9-822-1
> >
> > I am guessing that the VCJ is IC2301 (221-518).  can anyone tell me
> anything
> > about it?  Where is it supplied from, H drive at what pin, etc?  It
> appears
> > to not be powered...
> >
> > None of the Zenith manuals that I have contain anything like these
> modules.
> > Any help would be appreciated.
> >
> > Leonard G. Caillouet
> > Service Manager
> > Electronics World
> > Gainesville, FL
> > 352-332-5608
> > 352-332-5668 (fax)
> >
> >
> >
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References:
- [TechAssist] Re: Zenith SS8769H2, 9-840-1, 9-822-1 no power, FIXED
  - From: Rich Bateman
[TechAssist] Re: Zenith SS8769H2, 9-840-1, 9-822-1 no power, FIXED

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