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 Forum index » Instruments and Equipment » General Discussion
Yamaha DX7 II D battery issues
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DS-1



Joined: Jun 18, 2014
Posts: 1
Location: Italy

PostPosted: Wed Jun 18, 2014 10:57 am    Post subject: Yamaha DX7 II D battery issues Reply with quote  Mark this post and the followings unread

Hi guys,

I'm italian, so first of all...sorry for my bad English!

A friend of mine gave me this defect DX 7 IID. He told me that it doesn't sound at all...after a couple of years I decided to fix it.

First of all, I powered it up and the first thing I've noticed is that the patches names are all wrong, full of characters and without a name or word.

So I charged via MIDI some .SYX presets and the keyboard started to play! I removed the AC cable and tried to power it up after 20-30 minutes...the patches were gone. I've found on Google some DX7 users with the same problem, so I opened it up to see that...something was changed before into the main board (a new battery was installed, using a clip and some resistors were changed; the battery is running at 3.3v. The "test" mode (EDIT + 16 + 32) gave me only the "TEST v. XXXXX", then the keyboard rebooted.

What else should I try to check, above the battery?

Thanks in advance for the reply.
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