[Techtoolslist] Fwd: Fluke 9010A Display problem

[Jose Luiz Martins]

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 at 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 at 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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