[TechAssist] Re: ctc 169js5 wont start help!
- From: "Dave Routson" <davestv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 23 Mar 2002 21:29:05 -0600
Gary, did you replace C4108 along with C4102. Didn't see it in your list.
Usually C4102 is the culprit if you're
reading 8 to 9 volts on pin 16 of U4101. That's too low per my notes,
you should be running 11Von pin 16.
I'm not where I can check it now but
watch those 2 caps.
Dave Routson
Dave's TV
Cleburne, Tx 76033
817-641-8465
----- Original Message -----
From: "Gary McCartney" <number63@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, March 22, 2002 10:12 PM
Subject: [TechAssist] Re: ctc 169js5 wont start help!
>
> Charles, did you replace CR4122, 3.0V zener 1 watt? I have used a 3.3V
> zener once about 2 months ago and the set has not come back to me.
>
>
> Gary McCartney
>
> McCartney Electronics
> 7134 Fife Rd, RR 7
> Guelph Ontario Canada N1H 6J4
> Fax: (519)821-1530
> email: number63@xxxxxxxxxxxxx
>
>
>
> repair1 wrote:
> >
> > I pulled this chassis in from field, dead, cr4118 was open, changed set
> > fired up, ran fine, then I checked caps in smps and sweep , changed
c4401,
> > c4402, c4102, c4104. plugged set in, WONT START! pin 16 of u4101 toggles
> > between 8.3 to 9.5, pin 3 and 8 are zero, so there is no evidence of
> > overcurrent shutdown, pins 10 and 11 also toggle between 1.2 and 2.4
volts,
> > when these sets are ok this isusually 2.5v, this is the 20khz osc., B+
on
> > hot is 31.xx v ,varies afew tenths of a volt at
> > rate ic toggles, I can find no man made problems, I changed ic u4101
twice,
> > put the original in another chassis it ran fine, changed cr4118 again,
as
> > well as c4102, and c4104, this set is driving me to despair, any help
would
> > be greatly appreciated
> > charles betzler
> > Best Electronics
> > repair1@xxxxxxxxxxxxx
> >
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