Roland 80017A

Overview

DESCRIPTION who own's a synthesizer Roland Juno 106 soon or later reported "dead voices", they typically cause either a loss of sound or a a kind of crackle as the juno106 warms up. The most common fault is the failure of the 6 dreaded A1QH80017A (or more common 80017A) the VCF and VCA of the machine. This now hard to find IC (but many modern clones are available now) mainly is poor manufactured and ages badly for internal heat with resin, in fact the 80017A is a kind of capsule which contains well-know IC such as EG BA662 and VCF Ir3109.

beside 106, the 80017a can be found on these machine: HS-60 / GR-700 / MKS-30 / MKS-7

Testing the voice

TEST If you're not sure about which voice is not working, the juno106 contains a test procedure to check the faulty voice.
Simply power off your synth, press and hold the key transpose button and switch ON while holding key transpose, then release key transpose and press Poly 1 + Poly 2 at the same time. Try to play a single note thus the number of the voice will appear, once located the issue, open the machine and find out the relative 80017A. You need to desolder the faulty IC (it's NOT that easy!) finally either you replace it with a modern one (note: then you have to follow the CALIBRATION procedure) or try to fix it with the famous acetone.
->Of course, politically correct on the web warning: " I am not responsible for the damage! Continue at your own risk or call someone with guts"

80017A fix

The most important thing is to remove the resin coating out of the 80017A, most used way is to soak the IC into a 100% acetone in a glass jar for acouple of days (close it of course) until it's gone. Once free of resin, it could work without doing nothing more, but a good refresh resoldering to the IC is highly recommanded.

video Tutorial

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Roland 80017A

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Roland 80017A

Overview

Testing the voice

80017A fix

video Tutorial

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