Re: Fwd: Fluke 9010A Display problem

Good news!

Replaced the 14095 with a cd4095 and worked great!

Now i have the display working again.

Thanks!

JL
Em 04/03/2013 13:49, "Jose Luiz Martins" <joseluizmartins@gmail.com>
escreveu:

> Thanks John,
>
> After a close inspection, I realise that the display test was showing
> the number 8 on all segments.
>
> According to service manual the ICs 12 and 14 are responsible to drive
> the "internal part" of each segment, and the ICs 11 and 13 the
> "external part".
>
> A number 8 uses only "external" filaments and athe letter K, for
> instance, uses some "internal" ones.
>
> Put my scope on IC 14 and no action on output pins...
>
> Today i'll try to buy one mc14094bcp on some local store, and see what
> happens...
>
>
> Thank you guys!
>
> JL
>
> Enviado via iPad
>
> Em 03/03/2013, às 16:06, John Robertson <jrr@flippers.com> escreveu:
>
> > John Robertson wrote:
> >> Jose Luiz Martins wrote:
> >>> Hi !
> >>>
> >>> Today I've decided to put my 9010A back to work after 5 years.
> >>>
> >>> It boots OK, but the display is not showing some parts of some
> >>> letters. For instance the K and V looks like I.
> >>>
> >>> I opened and performed the display test, as mentioned on Workshop
> >>> manual, and everything seams to be right.
> >>>
> >>> Any clue on that ?
> >>>
> >>> Thanks
> >>>
> >>> JL
> >>> ___
> >>
> >>
> >> Haven't done the display test in years - does it check every segment?
> If so, and the segments all light up as they should then you may have a ROM
> issue where some of the ASCII code text in the text tables is defective.
> That is just a guess, you can check against the code on the ftp site to
> make sure the base ROMs are all good.
> >>
> >> Anyone else with a guess?
> >>
> >> John :-#)#
> >
> > Could be the decoder for the display, sounds like it handles individual
> segments OK, but may a problem with combinations needed to build letters...
> >
> > John :-#)#
> >
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Received on Mon Mar 4 20:02:57 2013