[TechAssist] Re: RCA G35772AT CTC187CL

Larry - I have a schematic for a CTC187CL3 if you want me to scan some
of it.

Max Bonnell
Bonnell TV
Robinson, IL 

 
 
Sender: techassist-bounce@xxxxxxxxxxxxx From:
videotech@xxxxxxxxxxxx(Larry=A0E) Date: Thu, Sep 30, 2004, 1:21pm
(CDT+1) To: techassist@xxxxxxxxxxxxx Subject: [TechAssist] Re: RCA
G35772AT CTC187CL DEAD/More info Reply=A0to: techassist@xxxxxxxxxxxxx 

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=3D 4.77 B=3D 5.1 C=3D 11.7 volts. Coul=
d
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!!! =A0
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=3D -40 
2=3D -33
4=3D 0
5=3D .9
6=3D .9
7=3D .4
8&9 =3D 0
11&12 =3D 165 thanks in advance, Larry E

Larry Eastman
American TV & Electronics
Crystal River, Fl. 34428 
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