[TechAssist] Re: mitsubishi tv CK3531R
- From: "Leonard Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 24 Aug 2003 20:20:36 -0400
I'm confused. Who is recommending replacing electrolytics with Tantalum
caps? I have not heard this from Mits. Did I miss something? We do these
sets frequently and have to change lots of caps, but never changed the type.
Typically tantalum caps should maintain a more stable capacitance and ESR
over time where electrolytics do degrade, so there should be nothing wrong
with replacing an electrolytic with a tantalum cap, but I have never seen a
recommendation to do so. In fact, as I understand it is getting harder to
get tantalum caps and manufacturers are pushing the ceramic technology for
use as replacements in SMDs. Seems unnecessary to me.
I agree, I would not replace a tantalum with an electrolytic, although it
would likely work fine in the short term, maybe even over time. In fact,
since the runs of bad tantalum caps in the 80s I have had very few of them
fail at all. I keep a bin of assorted tantalum caps from scrappers in case
I need one, but can't remember the last time I did.
The CK3531 is one of the sets, BTW, that we will no longer service unless we
test ALL of the electrolytics. We have seen to many recalls when repairing
only the immediate problems. Typically we find one or two dozen leaky and
high ESR electrolytics in these sets.
Leonard Caillouet
Electronics World
Gainesville, FL
----- Original Message -----
From: "Teltek3" <teltek3@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, August 24, 2003 7:11 PM
Subject: [TechAssist] Re: mitsubishi tv CK3531R
> Tony...
> In vertical circuits (timing) they even reccomend to change the
> electrolytics(1 to 2.2 ufd) with tantalums..so you are sort of
backtracking.
> Electrolytics will eventually fail, although I can not tell you why, or
the
> chemical makeup of the tantelums.
>
> -Ed-
> Ed Gaidies
> Tel-Tek Electronics
> Ontario-Canada
> teltek3@xxxxxxxxxxxx
> ----- Original Message -----
> From: "tony saracco" <tcselectronics@xxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, August 24, 2003 3:28 PM
> Subject: [TechAssist] Re: mitsubishi tv CK3531R
>
>
> > terry,
> >
> > what type of problem do you see if the 1uf 50v tant. cap is replaced
with
> a
> > standard 1uf lytic. I have replaced many and never really had any
> problems.
> > Just curious.
> >
> > Tony Saracco
> > TCS ELECTRONICS
> > Elgin , IL 60120
> > 847-695-1928
> > tcselectronics@xxxxxxxxxxxxxxxx
> > ----- Original Message -----
> > From: "Terry H." <tvdoc@xxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Sunday, August 24, 2003 10:09 AM
> > Subject: [TechAssist] Re: mitsubishi tv CK3531R
> >
> >
> > > You're going to find two 100/35volt caps that need changing as well as
a
> > > 1uf/50volt tantalum that should always be changed while you're in
there.
> > > They might be using a small purple 'OSCON' cap that looks like a
normal
> > > electrolytic, but needs to be replaced with a tantalum or the exact.
> Hard
> > > lesson if you use a standard electrolytic in it's place.
> > > Terry H.
> > > The TV Shop
> > > Gonzales, Tx
> > >
> > > ----- Original Message -----
> > > From: "Ed" <edb3@xxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Saturday, August 23, 2003 10:37 PM
> > > Subject: [TechAssist] Re: mitsubishi tv CK3531R
> > >
> > >
> > > > ok, thanks
> > > > Ed
> > > > Video Pro-Tech
> > > > Mesa Az
> > > > ----- Original Message -----
> > > > From: "al m" <ampm@xxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Saturday, August 23, 2003 8:35 PM
> > > > Subject: [TechAssist] Re: mitsubishi tv CK3531R
> > > >
> > > >
> > > > > Don't have the exact #'s But find the 24V line off the flyback and
> > check
> > > > the
> > > > > filter cap.
> > > > > al marquardt
> > > > > ampm@xxxxxxx
> > > > > Al Marquardt Electronic Repair
> > > > > 206 W Main
> > > > > Girardville Pa. 17935
> > > > > ----- Original Message -----
> > > > > From: "Ed" <edb3@xxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Saturday, August 23, 2003 11:32 PM
> > > > > Subject: [TechAssist] Re: mitsubishi tv CK3531R
> > > > >
> > > > >
> > > > > > Yes, but have worked on very few mitsubishi tv's, my expertise
is
> > > really
> > > > > > video cameras, have been out of tv's for a long time, im sure
ill
> > > > figure
> > > > > it
> > > > > > out, was just hoping to get some help to save time
> > > > > > ----- Original Message -----
> > > > > > From: "al m" <ampm@xxxxxxx>
> > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Saturday, August 23, 2003 8:24 PM
> > > > > > Subject: [TechAssist] Re: mitsubishi tv CK3531R
> > > > > >
> > > > > >
> > > > > > > You're not a tech are you?
> > > > > > > al marquardt
> > > > > > > ampm@xxxxxxx
> > > > > > > Al Marquardt Electronic Repair
> > > > > > > 206 W Main
> > > > > > > Girardville Pa. 17935
> > > > > > > ----- Original Message -----
> > > > > > > From: "Ed" <edb3@xxxxxxx>
> > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > Sent: Saturday, August 23, 2003 11:20 PM
> > > > > > > Subject: [TechAssist] Re: mitsubishi tv CK3531R
> > > > > > >
> > > > > > >
> > > > > > > > can you tell me what the caps are? c??? Dont have a
schematic,
> > im
> > > > not
> > > > > > sure
> > > > > > > > what cap it is your talking about
> > > > > > > > ED
> > > > > > > > Video Pro-Tech
> > > > > > > > Mesa AZ
> > > > > > > >
> > > > > > > >
> > > > > > > > ----- Original Message -----
> > > > > > > > From: "al m" <ampm@xxxxxxx>
> > > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > > Sent: Saturday, August 23, 2003 7:58 PM
> > > > > > > > Subject: [TechAssist] Re: mitsubishi tv CK3531R
> > > > > > > >
> > > > > > > >
> > > > > > > > > Replace also the B+ cap for the vertical off the flyback.
> > > > > > > > > al marquardt
> > > > > > > > > ampm@xxxxxxx
> > > > > > > > > Al Marquardt Electronic Repair
> > > > > > > > > 206 W Main
> > > > > > > > > Girardville Pa. 17935
> > > > > > > > > ----- Original Message -----
> > > > > > > > > From: "Ed" <edb3@xxxxxxx>
> > > > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > > > Sent: Saturday, August 23, 2003 8:01 PM
> > > > > > > > > Subject: [TechAssist] mitsubishi tv CK3531R
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > > This tv has retrace lines and vertical foldover at the
top
> > of
> > > > the
> > > > > > > > picture
> > > > > > > > > for the first 2 or 3 min , after warm is ok. I dont have a
> > > > shematic
> > > > > of
> > > > > > > > this
> > > > > > > > > set, im sure its a cap, anyone had this problem that can
> tell
> > me
> > > > > what
> > > > > > > caps
> > > > > > > > > usually fail? thx
> > > > > > > > > > Ed
> > > > > > > > > > Video Pro-Tech
> > > > > > > > > > Mesa Az
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
****************************************************************************
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