[TechAssist] Re: RCA Mod#P46813BL, CH# PTK195AA-dead

  • From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Thu, 28 Aug 2003 12:42:32 -0400

I have had a similar problem and it was a problem with the reset circuit,
pin 51 of micro.   See if you have 5volts on pin 51 with set off.  Do not
measure this when set is on per manual.     Q13501 can go bad, check out
this area.
I thought mine was bad micro too.
Phillip R Hull     STET
phil245@xxxxxxxxxxxxx
FAX 517--569-3075
Professional Technicians only
----- Original Message ----- 
From: "Richard La Placa" <continentaltv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, August 28, 2003 2:56 PM
Subject: [TechAssist] RCA Mod#P46813BL, CH# PTK195AA-dead


> Help???
>  When I unsolder pin 23 & pin 24 on micro.(U13101) I get real good clock &
data pulses coming out, but the DC voltages are low.The DC voltage on the
pads is 4.9 volts , but when I reconnect, I only get 1.6 volts on pin
23(data) & 2.29volts on pin 24(clock). The micro seems to be holding the
voltage down.I don't have anything coming out of pin 19(run/stby).The micro
costs $49.00, and I am trying to make sure it is really bad before I get a
new one. I dont see many of projection sets here and won't need a spare
micro if this is still good.
> Any help greatly appreciated
> Richard La Placa
> Continental TV
> 312a Park Row
> Chestertown, Md.
> fax&phone-410-778-1113
> website: http://www.continentaltv.homestead.com/
> continentaltv@xxxxxxxxxxx
>
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