F1 is located in upper left corner of AAS processor near 120 VAC input. This fuse protects the A/C input to the transformer.
If blown, AAS display will be out, no LEDs, no function.Location ETC Part# Description
F1 F112 FUSE .5 AMP 5X20MM
F2 is located above J9. This fuse protects the 12vdc output of the transformer.
If blown, AAS display and buttons will work fine, but LED CR7 will be dark and no stations will not function.
Typically blown during installation because 12vdc line was shorted.
Location ETC Part# Decription
F2 F124 FUSE .5A 125V 273.500 LTF
External Part# Littelfuse Part# 273.500 or DigiKey Part# F863-ND