if no pattern can be found on dead keys, it really sounds like more an oxydation issue than a connector/bus trouble. Was your keyboard stored in a moistured place? I've never opened this keyboard, so my advice might be not fully applicable.
- use a large workspace away from kids and pets and be prepared to use it for a couple of days.
- get a bunch of small plastic contents to store the screws while opening the case. Don't mix screws.
- if you don't have the right screwdriver, buy a good one. A cheap or wrong screwdriver will ruin your screws.
- if you have a digital camera, taking step-by-step pictures. Useful when reclosing the case.
- Once all screws removed, take care when you open the case: there might be a ground wire (green).
- it's better to remove the keyboard from the case. However, it could means removing a couple of other boards. Your judgement will guide you.
- take pictures of connectors position before removing them. Some could be rather tough to remove; your fingertips could be painfull after then. Don't use excessive force nor unadapted tools (pliers).
- avoid touching ICs; some are fragile enough to be harmed by ESD (electrostatic discharge). Being grounded is also a good idea.
- contacts could be de-oxyded with a QTip and a dedicated product such as Caig Deoxit. When really oxyded, I sometimes scrub with toothpaste/toothbrush and thoroughly clean the residue.
- reclosing the case is straightforward.
Hope this helps
François
(my daughter is named Adele as well; ;sweet name :-)
To: vintagesynthrepair@yahoogroups.com
From: amh78833@...
Date: Sat, 9 Aug 2008 14:47:27 +0000
Subject: [vintagesynthrepair] Roland EM2000 arranger
Hope it is ok to ask for help here.
My keyboard had been sitting a while and a couple of keys weren't
working. I was able to get them going by striking the keys a number
of times and all was well.
The keyboard was sitting for a while longer and a couple different
keys stopped working, not the same keys. Unfortunately, I cannot get
the keys to work by that same method.
I would like to open it and see what is going on...dust, oxidation,
rust, wear.....
I did check all the keys now and have found no pattern so I believe it
is not an electronic issue. Here is what is not working:
Octave 1 F# and A; Octave 2 C# and E; Octave 4 B; Octave 5 Eb
I haven't been able to find a service manual and there are MANY screws
on the bottom to open this. Any tricks or warnings? I have done
computer/electronic repair before so not too worried.....On the other
hand, I don't want to destroy anything else.
Second question is if it is just the contacts, any economical
suggestions besides replacing them?
Thanks very much........
Adele
in CT
My keyboard had been sitting a while and a couple of keys weren't
working. I was able to get them going by striking the keys a number
of times and all was well.
The keyboard was sitting for a while longer and a couple different
keys stopped working, not the same keys. Unfortunately, I cannot get
the keys to work by that same method.
I would like to open it and see what is going on...dust, oxidation,
rust, wear.....
I did check all the keys now and have found no pattern so I believe it
is not an electronic issue. Here is what is not working:
Octave 1 F# and A; Octave 2 C# and E; Octave 4 B; Octave 5 Eb
I haven't been able to find a service manual and there are MANY screws
on the bottom to open this. Any tricks or warnings? I have done
computer/electronic repair before so not too worried.....On the other
hand, I don't want to destroy anything else.
Second question is if it is just the contacts, any economical
suggestions besides replacing them?
Thanks very much........
Adele
in CT