SONY CD walkman -- operation problem?
Rudolf Ladyzhenskii
I was given SONY CD walkman for repair. After fixing "not reading disk"
problem I have another one and I suspect that this is something I do wrong.
Put disk in. Nothing happens. Press any button, TOC is read and it starts
playing. None of the buttons (FF, REW, STOP, etc) do not work. The only way
to stop it is to open the lid.
If I switch HOLD on, none of the buttons work, except PLAY. Pressing PLAY
shows HOLD on the LCD screen and this is it.
I have two questions:
1. What this HOLD is for?
2. Is it a problem with the thing or I do something wrong.
Thanks,
Rudolf
Russell Mora
Hold means that the unit ignores all button presses. This is for if the
unit is banging around in your bag, etc, and you don't want it to stop
when the stop button is accidently pressed, etc. Your hold button seems
to work OK judging by the fact that you can't play with the hold on.
The other buttons don't really do anything until a disc is playing
anyway (at least on my model).
The startup proceedure you describe is what my discman does as well -
put disc in, nothing happens, press play, toc displayed and disc then
starts to play. This is normal.
As for the buttons not working, I don't really know what is going on
there. One question though - with a disc playing, does pressing the
play button again cause the disc to pause?
Regards,
Russell.
--
Contact info http://www.ele.auckland.ac.nz/students/mora/contact.html
Rudolf Ladyzhenskii
> Hold means that the unit ignores all button presses. This is for if the
> unit is banging around in your bag, etc, and you don't want it to stop
> when the stop button is accidently pressed, etc. Your hold button seems
> to work OK judging by the fact that you can't play with the hold on.
> The other buttons don't really do anything until a disc is playing
> anyway (at least on my model).
Yep, this is working.
>
> The startup proceedure you describe is what my discman does as well -
> put disc in, nothing happens, press play, toc displayed and disc then
> starts to play. This is normal.
In my case ALL of the buttons act like PLAY.
>
> As for the buttons not working, I don't really know what is going on
> there. One question though - with a disc playing, does pressing the
> play button again cause the disc to pause?
Nope, none of the buttons make any difference.
Rudolf
Russell Mora
>
<snip>
Oh, that is unusual. Unfortunately here is where my (very limited)
knowledge of these discmans ends - I've never had a problem with mine.
:) Hopefully someone else will be able to offer you some advice...?
Best of luck with your repair. Hope I've been able to help with the
hold function at least.
Raymond Carlsen
> problem I have another one and I suspect that this is something I do wrong.
> Put disk in. Nothing happens. Press any button, TOC is read and it starts
> playing. None of the buttons (FF, REW, STOP, etc) do not work. The only way
> to stop it is to open the lid.
Rudolf,
It sounds like the problem I had with the few units I've worked on.
Each button switches in various values of resistance onto two conductors
going to the bottom board. A fixed resistor value is on the third
conductor. The "resistors" are painted on the plastic "button board". The
ribbon cable that connects the button assembly to the main board go around
back where the lid if hinged, so they flex every time the case is
opened/closed. The ribbon cable is plastic with -conductive paint- for
wires. When they start to open up, the resistance goes up (wrong functions)
or opens completely (no functions). A new switch/ribbon assy cost me $26 US
for the first repair job I did. I hard wired the second one... not easy but
it worked. The trick is finding the correct values of resistance for each
button. One resistor can be wired across two board traces to eliminate one
ribbon conductor. The remaining two are necessary to operate the buttons.
You'll need conductive glue to attach thin flexible wires to the old button
"board" if you decide you want to tackle it that way. I'll never do another
one. Typical Sony junk, designed to fail, and repair parts will eat you up.
Ray