[TechAssist] RCA -PTK195AA chassis-Need schematic-dead
- From: "Richard La Placa" <continentaltv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 21 Aug 2003 22:37:31 -0400
Hello all
Is there any alternative to buying a $75.00 service manual to get a schematic?
I have a chassis on the bench that might need a microprocessor, but I want to
trouble shoot it a little better first.I do have a pulse at pin 5 on the eprom
with 1.5 volts dc there and I don't know if that's the clock or data line., and
can see a very weak pulse on pin 6 of eprom with 2.3 volts there. I scraped the
glue from under caps 503 & 581 on the convergence board, thinking that might be
holding the data line down.There is only .52 volts at the black wire at P19503,
and .48 volts on the white wire there.I also have 4.9 volts at one of the pins
on the micro. I do have 140 volts at the hot across a 40 watt light bulb for
test load.
Any help is appreciated
Richard La Placa
Continental TV
Chestertown, MD,21620
Fax# 410-778-1113
continentaltv@xxxxxxxxxxx
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