[TechAssist] Re: RCA G35772AT CTC187CL DEAD/More info
- From: Larry E <videotech@xxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 30 Sep 2004 13:21:43 -0400
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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