[TechAssist] Re: Pioneer PTV SDP4573K, poor pix for 2 minutes
- From: "Jerry" <geiting@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 26 Jan 2002 17:28:49 -0500
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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