[TechAssist] Re: GE - 31GT657FM1, Chassis CTC177CC

  • From: "Premium Technologies" <premtech@xxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 14 Jan 2002 12:32:59 -0800

Al,
I checked cr4704, (good), and I have previously replaced but rechecked c4502, 
(also good)..  I'm reading 20v on pins 4 & 5 of rn4501, which is high according 
to your tip, and re-tested both r4517 & r4519 hot (both good).  Could something 
in rn4501 be open and still have a good V-out?
I tried Dan's tip and replaced r4511, had one just sitting here, (no change).  
I'll recheck the ground in the tuner next, on Jack's advice...  Any further 
tips, don't be bashful...
Thanks for all the help!!
Bill
Premium Technologies
Ocean Park, Washington
 
----- Original Message ----- 
  From: al m 
  To: techassist@xxxxxxxxxxxxx 
  Sent: Monday, January 14, 2002 5:57 AM
  Subject: [TechAssist] Re: GE - 31GT657FM1, Chassis CTC177CC



  what do you have on pin 4&5 ofrn4501 should be 12V if not check cr4704 r4517
  r4519 c4502
  al marquardt
  ampm@xxxxxxx


  ----- Original Message -----
  From: "al m" <ampm@xxxxxxx>
  To: <techassist@xxxxxxxxxxxxx>
  Sent: Sunday, January 13, 2002 9:57 PM
  Subject: [TechAssist] Re: GE - 31GT657FM1, Chassis CTC177CC


  >
  > does the bottom look stretched i have a ctc195 doing the same thing
  > al marquardt
  > ampm@xxxxxxx
  >
  >
  > ----- Original Message -----
  > From: "Premium Technologies" <premtech@xxxxxxxxxxxxxx>
  > To: <techassist@xxxxxxxxxxxxx>
  > Sent: Sunday, January 13, 2002 3:09 PM
  > Subject: [TechAssist] GE - 31GT657FM1, Chassis CTC177CC
  >
  >
  > > Content-Type: text/plain;
  > > charset="Windows-1252"
  > > Content-Transfer-Encoding: quoted-printable
  > >
  > > BlankGentlemen,
  > > I'm having an elusive vertical problem with the above described which is
  =
  > > producing a horizontal line 1/4 of the way down from the top of the =
  > > screen.  No schematic on this one, but from past experience it seems my
  =
  > > in voltage might be low on the vertical deflector U4501.
  > > I've replaced U4501,  and about 8 of caps in that circuit, (C-4502, =
  > > 4108, 4107, 4506, 4505, 4705, 4112, 4404) with no change in symptoms.  =
  > > My voltage readings on pin 1 and 2 of U4501 are 13.4 and 24.7 =
  > > respectively, and 23.0 on 5-Vout.
  > > I've traced circuit for open shorts with no luck, and quickly running =
  > > out of patience.  Any help would be appreciated...
  > > Bill
  > > Premium Technologies
  > > Ocean Park, Washington
  > >
  > >
  > >
  > >
  > >
  > >
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