[TechAssist] Re: RCA G35772AT CTC187CL DEAD/More info
- From: Larry E <videotech@xxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 30 Sep 2004 14:31:29 -0400
Bob, not sure what your saying, you want me to bridge R4104 with a 1.5 meg
resistor?
because pin 4 of the regulator is 0 volts? What is pin 4`s voltage supposed to
be? Larry E
Larry Eastman
American TV & Electronics
Crystal River, Fl. 34428
"Bob@Bobs tv" wrote:
> Larry,
> Bridge a 1.5m resistor (R4104) so you know for sure...Pin 4 needs a
> + voltage to get the regulator going...
> Bob,
>
> Bobs TV Worcester, ma
>
> woodman1@xxxxxxxx
>
> Main 508-853-1482
> Fax 508-853-1480
> ----- Original Message -----
> From: "Larry E" <videotech@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, September 30, 2004 1:21 PM
> Subject: [TechAssist] Re: RCA G35772AT CTC187CL DEAD/More info
>
> > Hi Guys, replaced the eprom and still have the same problem, zero volts on
> pin 6,
> >
> > 4.32 on pin 8&5. Unsoldered pin 54 of U1001 thinking it might have been
> pulling
> > it down, no change, Q4105 is supposed to be the 5v standby source? (no
> schematic)
> >
> > I have ( measured to cold ground) E= 4.77 B= 5.1 C= 11.7 volts. Could
> the 4.32
> >
> > be too low on pins 8 & 5 ? I was told pins 5&6 get the 5 volts from pin 8
> of
> > U3201
> > so I`m still confused how pin 5 can have 4.32 but pin 6 would be zero if
> the
> > source
> > is internally from pin 8 even with a new eprom installed, HELP!!! Larry
> E
> >
> > Larry Eastman
> > American TV & Electronics
> > Crystal River, Fl. 34428
> >
> > Larry E wrote:
> >
> > > Hi Guys, this 187CL is stone dead, no click from relay, HOT is good,
> > > have 160 v on collector
> > > in standby, resoldered H- driver transformer and the coil, C4107 is
> > > good, found a bad
> > > C4105 10uf @ 200 replaced it with no change, I need to know if the
> > > voltages are correct
> > > on U4101 as I don`t have the schematic, they are
> > > Pin 1= -40
> > > 2= -33
> > > 4= 0
> > > 5= .9
> > > 6= .9
> > > 7= .4
> > > 8&9 = 0
> > > 11&12 = 165 thanks in advance, Larry E
> > > Larry Eastman
> > > American TV & Electronics
> > > Crystal River, Fl. 34428
> > >
> >
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