Thanks to Owner-Manuals.com! This manual was exactly what I needed. As Amana was purchased by Maytag and later by Whirlpool, there was no way to receive it from their websites. I was lucky to find this resource.
A comprehensive Operating and Service Manual. All schematics are complete and easy to read. The PCB drawings and complete parts list are very helpful. I would definitely recommend this manual.
Text excerpt from page 19 (click to view)
Chapter 2 Using the GR-20 with Guitar Effects
Patch Link Setup (PATCH LINK SETUP)
Here�s how to link the patches (sounds) of your multi-effects unit with the patches (sounds) of the GR-20. This will cause the GR-20 to automatically switch to the specified sound (patch) when you change patches on your multi-effects unit. 1. Use a MIDI cable to connect the MIDI OUT of your multi-effects unit to the GR-20's MIDI IN. 2. Make sure that the MIDI transmit channel of your multieffects unit is the same as the MIDI channel of the GR-20 (p. 18). 3. Press the [SYSTEM EDIT] button a number of times until the PATCH LINK SETUP/TRANSPOSE indicator lights.
fig.2-04(PATCH LINK)
4. On your multi-effects unit, select the patch for which you want to specify a link. * When you select a patch on your multi-effects unit, it will send a �MIDI Program Change� message to the GR-20. The GR-20 will remember the content of this message, and will be ready for you to specify the patch link setting. * If two or more consecutive patch changes occur when you are selecting a patch on your multi-effects unit, the GR-20 will remember only the last-received MIDI program change. 5. Use the [BANK] knob and [NUMBER/VALUE] knob to select the synth sound in the GR-20 that you want to use with the effect you chose in step 4. 6. Repeat steps 4�5 to set as many links as you need. 7. Press the [EXIT] button. You will return to Play mode, and the settings you made will be stored. * The decimal point in the display will blink while the setting is being stored. Don't turn off the power during this time. * If you turn off the power before returning to Play mode, your settings will not be stored.
