2014.Nov. 29
Min EXPERT 1k-FA vil ikke lade
sig betjene af keyboardet mere.
Ved at beklage min nød på YAHOO-gruppen, fik jeg denne besked:
The cable to the Front Panel is defective, you will have to replace the cable and front panel buttons. Check the files section. Vy 73 de Bob DJ0RD/WU5T
Og en anden gav dette råd:
Put something that blocks the high heat from the side wall. In other words, put it between the MEMBRANE cable and the side metal wall.
In fact, anyone with an old 1K, check to see if there is a piece of something, stuck on the side wall allowing the cable to rest on it.
If there isn't one, put something there.
Several pieces of duct tape will work until you get something from the store. The white stick "squares" that are about 1/16" or more thick work fine.
The heat from the MOSFETs cause that side wall to heat up and the membrane cable laying on the side wall is the problem.
The heat deteriorates the cable and it cracks causing one or more open traces.
Remember, do not clean the contacts on the membrane cable. I have never found them to get dirty enough to be bad or even intermittent.
GL guys. I'm the service person for western hemisphere. Been doing it for three years now.
Bob Hardie, W5UQ
Konklusionen på det må være, at keyboardet udskiftes med et nyt, så jeg bestilte et nyt hos den danske forhandler i Hirtshals, og det er nu kommet.
Medfølgende på papir kom en beskrivelse af, hvorledes man skal adskille
PA-trinet, og komme ind til forplade-kontrolleren, men
denne beskrivelse findes også på nettet, så den er grundigt studeret forinden
ordren til Hirtshals afgik. Den kan ses HER...
Dette dokument handler om dokumentation af, hvad jeg har foretaget mig under udskiftningen.
2014.Nov.
29
My EXPERT 1k-FA
will not let
one of the keyboard more.
By regret my
distress at YAHOO group,
I got this message:
The cable til Front panel is defective, you willhave two replace the cable and front panel buttons. Check the files section. Vy 73 de Bob DJ0RD / WU5T
And another gave this advice:
Put something that blocks the high heat from the side wall. In other words, put it between the MEMBRANE cable and the side metal wall.
In fact, anyone with an old 1K, check to see if there is a piece of something, stuck on the side wall allowing the cable to rest on it.
If there isn't one, put something there.
Several pieces of duct tape will work until you get something from the store. The white stick "squares" that are about 1/16" or more thick work fine.
The heat from the MOSFETs cause that side wall to heat up and the membrane cable laying on the side wall is the problem.
The heat deteriorates the cable and it cracks causing one or more open traces.
Remember, do not clean the contacts on the membrane cable. I have never found them to get dirty enough to be bad or even intermittent.
GL guys. I'm the service person for western hemisphere. Been doing it for three years now.
Bob Hardie, W5UQ
The conclusion of this must be that the keyboard must be replaced with a new one, so I ordered a new one from the Danish dealer in Hirtshals, and it has now arrived.
Included
in the paper came
a description of how to separate
the PA-step
and get to the front
panel controller, but
this description is
also available on the web so
that it is thoroughly studied
before the order to Hirtshals
departed. It can be
seen HERE ...
This document is about documenting what I have been doing during the replacement.
Herover ses det adskilte
Display-kontroller med keyboard-filmen afmonteret fra forpladen, som endnu ikke
er renset for
limrester, nederst i
billedet.
Above
is the
separate display controller
with keyboard-film
removed from the front panel,
which has not been cleaned for
paste on the picture.
Herover ses et nærbillede af
Keybord-kablet, som er udført ved at dampe sølvledninger på gennemsigtigt
plastik.
I midten af billedet ses en bugning, som er udført fra fabrikken,
og denne bukning er gennem 4 års brug blevet udsat for
varmen fra
udgangstransistorerne i PA-trinet, så forbindelserne er ødelagte.
I posen med reserve-keyboardet var også en lille pude af skumplastik, med lim
på den ene side, som blev monteret efter W5UQ's
anvisning, så keyboard-kabelet ikke kommer i berøring med den varme væg inde
i PA-kassen.
Above
is a close
up of Keybord cable,
carried out by vapor silver
wires on transparent plastic.
In the middle of the image a bending,
which is done at the factory,
and this bending
is through 4
years of use have been exposed
to
the heat from the power elements
in the PA-step, so
the links are broken.
In the bag with reserve-keyboard
was also a small pad of foam
plastic with adhesive on one
side which was mounted after
W5UQ's
told you so keyboard
cable supplied does not come into
contact with the hot wall inside
the PA coffers.
Herover ses et oversigtsbillede
af spisebordet i køkkenet, hvor operationen foregik. Her med den rengjorte
forplade, hvorpå
det nye keyboard skal påmonteres.
Above
is an
overview picture of the
dining table in the kitchen where
the operation took place. Here
with the cleaned front
plate, which
the new keyboard to
be fitted.
Processen med, at påmontere
den nye keybord-film på forpladen, var den jeg var mest nervøs for, men det
viste sig at være
nemt og lige til, og keyboardet var på plads på under 1 minut. Herover ses det
på forpladen monterede keyboard.
The
process,
the installation of the new keybord-film
on the front, was the
one I was most nervous about,
but it turned out to be
easy and straightforward, and
the instrument was in place in
less than 1 minute. Above is
the front plate mounted
keyboard.
Nu går øvelsen bare på at samle alt sammen i samme rækkefølge som da det blev skilt ad.
Now the exercise just to gather everything together in the same order as when it was dismantled.
Og det var da heller ikke noget problem, så efter 3 kvarters tid, var keybord/display-kontrolleren samlet igen og klar til montering i EXPERTen.
And it was no problem, so after three quarter of an hour, was keybord / display controller reassembled and ready for installation in Experten.
Herover set fra en lidt anden vinkel.
Above viewed from a slightly different angle.
Herover ses den færdigsamlede Keyboard/display-kontroller sammen med det gamle og defekte keyboard liggende tilbage.
Nu er kontrolleren klar til at blive monteret i EXPERT'en.
Efter monteringen i EXPERT, virker alle knapper igen i PA-trinet, så den side af sagen må siges at være en SUCCES... men...
Jeg må have
lavet en fejl ved montering af kontrolleren, for selv om jeg kan konstatere
at keyboardet
virker, vil trinet
ikke operate, selv om det er i OPERATE-MODE. Det skal nu
kontrolleres.
Og det viste sig, at PTT-ledningen ubemærket var blevet trukket ud af min radio, Yeasu FT847, i kampens hede, men NU virker alt som det skal.
De OZ6YM, Palle
Above is fully assembled Keyboard / Display Controller together with the old and faulty keyboard lying back.
Now,
the controller is ready to be mounted
in EXPERT'en.
After the installation in EXPERT,
works all the buttons again
in PA-step
with the side of the case is
said to be a SUCCESS ...
but ...
I must have made a mistake when
installing the controller, although
I note that the
keyboard works, the step
does not operate,
even though it is in the
OPERATE mode. It must
now be checked.
And it turned out that the PTT
cord unnoticed had
been pulled out of my radio,
Yeasu FT847, in
the heat of battle, and
NOW does everything as
it should.
The OZ6YM, Palle