Gallien-Krueger Backline 100, Service Manual

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7) Reverb knob to 10- Fig. 15. Reset.
8) Scope to 50mV/div. Line out (J5) looks like Fig. 14 (different scale).
9) Scope to 5V/div. Headphone outs look like Fig. 8.
FOOTSWITCH TEST
1) With a stereo cord, connect RF2 to footswitch jack on front panel.
2) Engage Channel Switch and Lead 2 switch to the front panel.
3) If necessary, push footswitches so both LEDs are off.
4) Compare output to Fig. 8.
5) Engage Channel footswitch, LED on panel & footswitch light. Output goes up.
6) Engage Lead Channel footswitch, footswitch LED lights, output goes up.
NOISE TEST
1) Remove oscillator input.
2) Connect speaker to output and listen to noise. It should be clean with no distortion or crackling on both channels.