Roland Juno-D help requested

[junomike]

Hello everyone, hope everyone is doing well. I would like to ask for help for my Juno-D
these keyboards are know to have keybed issues but.. tell me what you think.

The problem: only D4 key and C7-B7 octave are working.

I removed the keyboard, cleaned every key contacts and boots with alcohol. I also made a new flat ribbon cable for the keyboard thinking this could be the issue

I then fired it up and still the same notes worked, nothing changed.

I then tried it with a controller and all the notes are sounding when played from the other keyboard.

Would anyone have the service manual? I suspect the scanning IC but I'm not entirely sure this is the problem.
If anyone could help me out, I'd really appreciate it.

Thanks

 

[SeaGtGruff]

I looked on ElektroTanya.com, but they don't have the Juno-D service manual.

 

[happyrat1]

These guys have every free manual on the web. They don't list the Juno D but you may find a close match with a similar model.

http://www.synfo.nl/pages/servicemanuals.html

Gary

 

[happyrat1]

These guys will sell you a Juno D manual for $4.

Money well spent if you ask me.

http://servicerepairmanuals.net/others/roland-juno-d-searvice-manual/

Gary

 

[junomike]

Thanks Gary, I purchased the repair manual. now the task of verifying the SSC1080 scan IC to see if its doing its job.
Meanwhile, I updated the ROM and ran the test diagnostics thanks to the manual but it still is unresponsive (same as before) Roland made those ribbon cables so short it will be impossible to turn over the main board for testing. Need to find some solutions..