GR-20 Issues

Started by BassSix, February 22, 2013, 01:36:38 PM

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BassSix

My GR-20 has a problem that I can't figure out. On power up, it immediately starts scrolling backwards rapidly through the patches. Also, the same reverse scroll occurs in settings menus. I've reset to factory, but nothing helps. Any ideas?

Elantric

#1
Remove the 13 pin cable and retry -

Sounds like a stuck "S1" switch on your GK-3B

or

a stuck footswitch on the GK-20

Unplug & power down GR-20 , rapidly step on all GR-20 foot switches, and with hands , move all other controls and rapidly tap all other switches at least 10 times. This action will knock off any Oxidation that has occurred on the internal switch contacts.

If it were me - Id sparingly squirt some Caig De-Oxit on all controls.

http://www.stewmac.com/shop/Electronics,_pickups/Supplies:_Cleaners_and_lubricants.html


It could also be due to a faulty 13 pin cable
https://www.vguitarforums.com/smf/index.php?topic=3132.0