[TechAssist] Re: PTK195KB convergence off/not there
- From: "Electric Medic" <info@xxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 7 Nov 2002 20:07:07 -0500
Larry:
Do you stock those convergence power supply boards? I would just sub the
board out. We stock a few of those, shop and service vans. They are only
around $30, way to cheap to troubleshoot. Although we have fixed some, we
quit after finding it is better for the customer and us to just replace the
module. At least if you have problems elsewhere, like we have seen, you can
look elsewhere.
Perry Bower
Electric Medic
http://www.electricmedic.com
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-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Larry E.
Sent: Wednesday, November 06, 2002 10:32 AM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] PTK195KB convergence off/not there
Hi guys, RCA PTK195KB, convergence way off, picture has the usual bow,
didn`t have schematic on the truck, set had 1.2 volts on positive 15v
line, -2.2 on -15v line, 26v line is good. Pulled both 15v diodes and
they both checked good, pulled R19722 750K resistor it also reads good.
Tried to pull up crosshatch in customer menu and it will come up 1 time
out of 10 try`s,when it did come up I tried to move the blue and the set
momentarily shuts down, when it comes up it`s out of the menu mode
alltogether and then the convergence mode is no longer there. I shut the
set off for approx. 10 minutes to check components/solder on conv. power
board and when I powered the set back up the convergence was ok, +15/-15
were both there, 3-4 minutes later the convergence went back out and
both 15v lines were gone again. No bad solder, no burnt parts, heatsinks
on convergence board are of course cold, all plugs plugged in. Going
back this afternoon with schematic, anybody seen this problem ?? tia,
--
Larry Eastman
American TV & Electronics
Crystal River, Fl.
http://www.tvjunkyard.com
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