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CHANNEL SWITCHING / FOOTSWITCH PROBLEMS
a) Verify that the channel switcing and reverb are working properly with the footswitch disconnected.
b) If the footswitch is not working, tighten the small set screw in the XLR connector on the footswitch cable.
NOTE: this is a reversed—right-hand thread). The footswitch ground makes its contact through this screw.
c) If the channel switching at the amp is not working, replace the defective 4049 IC and check the R132, 22
ohms resistor.
EFFECTS LOOP PROBLEMS
a) Check the Effects Loop with nothing connected into the loop. If everything is OK, a noticeable drop in
volume should occur when depressing the EFF 1 button to the on position on the footswitch.
b) With the effects loop turned on, connect a shielded phone cord to the "Return" jack. The signal should be
off. Connect the other end to the "Send" jack. The signal should be there. Now, change the position of the
effects loop "Level" switch . There should be no noticeable change in the volume level. Further, turn the
effects loop on and off via the footswitch. Again, there should be no noticeable change in volume.
c) Set the "Level" switch (-10, 0 or +4) to the position that offers the lowest noise without distortion.
d) If the effects loop is not functioning, servicing will be required.
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