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

  • From: <tvservice@xxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Tue, 2 Sep 2003 09:12:03 -0500

+153 volts in standby is normal
Unsolder R14708 on front of main board (labeled R708 on board)
then in standby measure for +5 and +12 at pins 6 and 7 of IC14701
if missing eithe replace IC14701 or look for load on these pins
Also look very carefully around eeprom and micro for coolant leakage
Had this last week finally removed chipper check service connector from
board found corrosion underneath
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
Dallas, TX
----- Original Message ----- 
From: "Richard La Placa" <continentaltv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, September 02, 2003 8:48 AM
Subject: [TechAssist] Re: RCA Mod#P46813BL, CH# PTK195AA-dead


> Hello everyone,
> I am still in the dog house on this one.
> I changed the micro & eprom and still no go. Can anybody tell be what the
B+
> should be in the standby condition? I have 153.4 volts at the hot. I tried
a
> 40 watt bulb for a load and get 140 volts there, but all other voltage
> supplies are still high. Can this cause the micro to lock up?
> tia
>
> Richard La Placa
> Continental TV
> 312a Park Row
> Chestertown, Md,21620
> Fax&Phone-410-778-1113
> continentaltv@xxxxxxxxxxx
>
>
>
>
>
> >From: <tvservice@xxxxxxxxxxxxx>
> >Reply-To: techassist@xxxxxxxxxxxxx
> >To: <techassist@xxxxxxxxxxxxx>
> >Subject: [TechAssist] Re: RCA Mod#P46813BL, CH# PTK195AA-dead
> >Date: Thu, 28 Aug 2003 14:27:44 -0500
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> >Sounds like a bad micro to me
> >Robert
> >tvservice@xxxxxxxxxxxxx
> >H & H Electronics Inc
> >Dallas, TX
> >----- Original Message -----
> >From: "Richard La Placa" <continentaltv@xxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Thursday, August 28, 2003 1:56 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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