[TechAssist] Re: Mitsubishi CS-31303, no vertical deflection.
- From: tjanphyl@xxxxxxxxxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 18 Jun 2005 15:22:14 -0400
Boy you do go back a few years! I remember using a small 6.3VAC
filament transformer and a .1ufd lemmon drop cap as a coupler. The
6.3vac was good as a vertical drive signal sub and fed it to the vert
grid.Got a stretched rolling pix instead of a line and that was the
test.
Phil
----- Original Message -----
From: "majorthom@xxxxxxxxxxxxx" <majorthom@xxxxxxxxxxxxx>
Date: Saturday, June 18, 2005 2:07 pm
Subject: [TechAssist] Re: Mitsubishi CS-31303, no vertical deflection.
> borrow 60 cycle from somewhere and trigger chip-don't forget small
> coupling cap[not electrolytic]
> Jim Myers <jr.myers@xxxxxxxxxxx> wrote:Yes, replacing the resistor
> did restore VCC to the chip and no I did not
> replace the output IC yet since I will have to order it. I am sure
> that
> a vertical drive signal is required for the output IC to produce
> deflection and there is none on any of the 9 pins so I would like
> to
> know where this drive signal comes from since I will probably have
> to
> order two IC's.
> Guess I'm so used to reading between the lines now I'm starting to
> write
> between the lines too. Sorry about the omitted information.
>
>
> ********************************
> Since 1972 *
> Jim Myers *
> Telrad Electronics *
> Fort Wayne Indiana *
> ********************************
>
>
> Phil Bader wrote:
> > First, did replacing the resistor RESTORE Vcc to the chip? I
> would
> > assume so, but you didn't say. The open resistor would confirm a
> bad
> > vert output. You also omitted if you changed the IC401, which
> should be
> > automatically done in this case before going on to other
> possibilities..> Let us know.
> > Phil Bader
> >
> > Philip Bader
> > Jan Phyl TV Inc. (estab. 1976)
> > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > Fax (863) 299-8821
> > email: tjanphyl@xxxxxxxxxxxxxxx
> >
> >
> >
> > Jim Myers wrote:
> >
> >
> >>Found R570 open and no 28V to vertical IC401, replaced it but
> still no
> >>vertical. I don't see any drive signal to IC401 a TA8427K. Any
> tips for
> >>this problem?
> >>
> >>Thanks,
> >>
> >>********************************
> >>Since 1972 *
> >>Jim Myers *
> >>Telrad Electronics *
> >>Fort Wayne Indiana *
> >>********************************
> >>
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> Peter Neal
> Neal Electronics
> 1905 E. Wm.Cannon
> Austin,TX 78756
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