[TechAssist] Re: Pioneer PTV SDP4573K, poor pix for 2 minutes, FIXED!!
- From: "Jerry" <geiting@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 30 Jan 2002 22:47:54 -0500
Hi Ken,
Sorry I wasn't more specific in my original answer. I haven't done one
of
these in awhile. Yeah I guess it would have helped to tell you the location
and size of the "module" and cap values. Well glad you found it anyway.
Jerry
Christians Electronic Service
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of gulftech@xxxxxxxx
Sent: Wednesday, January 30, 2002 10:37 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Pioneer PTV SDP4573K, poor pix for 2 minutes,
FIXED!!
Friends,
I finally got this one fixed. Found many marginal caps, but none
affected the symptoms I listed. Jerry mentioned "bad caps in the I.F.
circuit that was on its own circuit board off the motherboard, " and
Winstips listed "C22 & C26, 0.47ufd, 50V." Both were right, but it took
me a long time to put it together. There are many "C22's" on the signal
pcb. The IF module sits directly behind the tuner. Looks like the IF
module used in Sony's that cause so much trouble.
Final solution: C22 & C26 in the IF module AXF1062-A, both caps .47@50.
Both caps measured very high ESR and low capacitance.
Hope this helps.
Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL 32561
850-934-8324 (Voice) 850-932-0819 (Fax)
From: GulfTech@xxxxxxxx
To: techassist@xxxxxxxxxxxxx
Date: Sun, 27 Jan 2002 16:01:29 -0600
Subject: Re: [TechAssist] Re: Pioneer PTV SDP4573K, poor pix for 2
minutes
Message-ID: <20020127.164043.-3737343.0.GulfTech@xxxxxxxx>
Jerry,
Thanks for the suggestion. This set was mfg. Oct. 1993. Will check that
out tomorrow (Monday).
It's a shame that for such a fine set as Pioneer is, there are so many
problems with solder connections and the service manuals are cost
prohibitive unless you do a lot of that brand. We do a lot of Hitachi,
RCA, and Magnavox--perhaps 20 of those brands (combined) to each Pioneer.
Thanks for your help. Hope your teams win today!
Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL 32561
850-934-8324 (Voice) 850-932-0819 (Fax)
On Sat, 26 Jan 2002 17:28:49 -0500 "Jerry" <geiting@xxxxxxxxxx> writes:
>
> Ken,
> I don't know how old this set is, but I've seen some
> Pioneer's made in the
> mid 1990's that with similar problems to yours that were caused by
> bad caps
> in the I.F. circuit that was on it's own circuit board off the
> motherboard.
> I don't remember the symbol # or cap values, but they were the few
> electrolytic caps on this small module.
> Jerry
> Christians Electronic Service
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of
> gulftech@xxxxxxxx
> Sent: Saturday, January 26, 2002 5:01 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Pioneer PTV SDP4573K, poor pix for 2 minutes
>
>
>
> Friends,
>
> This one has me baffled. When first turned on, there is no picture
> of
> sound. The OSD is present, but a little unstable. After 20 seconds
> or
> so, both pix and sound come in, but the picture is unstable (slight
> horizontal tearing) with black streaks through it. The picture
> gradually
> improves. At two minutes, the picture is nearly perfect, with just a
> hint of a jailbar on the left side of the screen. The OSD is now
> stable
> as a rock. The jailbar or bars have vanished. The set is perfect.
> The
> set must be turned off for about three hours for the symptoms to
> return.
>
> Pioneer is famous for poor solder connections. All boards have been
> gone
> over and resoldered three times. We've used enough cold spray to
> bring
> on global warming. We ESR'd every cap in sight and replaced about a
> dozen that even hinted at marginal.
>
> I need a miracle. Hope someone has been down this street and can
> point
> me to a happy ending.
>
>
> 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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