Thanks for the info Brian.
Which model was that Technics?
I also don\u2019t have the info on which keys I have to press at start up to reset the machine.
Best regards,
Jose
Portugal
De: vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] Em nome de Brian Davies
Enviada: sábado, 4 de Abril de
2009 12:05
Para: vintagesynthrepair@yahoogroups.com
Assunto: RE: [vintagesynthrepair]
Technics KN800
Hi Jose
I had a similar problem on a Technics recently. Fortunately I had a service manual and was therefore able to put it right. In my case memory backup was achieved by a nickel cadmium battery that had failed. In this case there was a mistake in the circuit in that no means of charging the battery had been made. So after replacing the battery for NiMH and adding a couple of components to ensure that the battery would charge up, the manual said leave the keyboard on for at least an hour and then reset it by turning off the mains power, hold down three specific key in the rhythm section and then switch the mains power back on. This worked just fine. ; Probably your unit needs similar resetting.
From: vintagesynthrepair@yahoogroups.com
[mailto:vintagesynthrepair@yahoogroups.com]
On Behalf Of letcista
Sent: Saturday, 04 April 2009
10:29
To:
vintagesynthrepair@yahoogroups.com
Subject: [vintagesynthrepair]
Technics KN800
Hello:
I'm trying to solve a problem with an old KN800 from Technics.
The owner left it stored for aboiut two years.
When he turned it on there's no message in the display and the keyboard produced no sound.
The internal memory is keep with a capacitor 1 Farad 5,5 Volt in place of the
normal litium battery.
I replaced the capacitor, gave it a charge for several hours.
Now the keyboard starts up with the regular message on
the display but seem that the memory is all scrambled with strange messages in
the display and the sound is kind of random.
My questions are:
- Does anyone have deal with a similar problem?
- Does anyone have a pdf version of the service
manual?
- Does anyone know how to make a hard reset to the machine?
Any help will be appreciated.
Best regards.
José.
Portugal