Level Meter (No Load) - Yamaha PC9501N Service Manual

PC9501N

1-2-14. Level meter (no load)

Feed 1 kHz sine wave to the input terminal, then set the input signal so that the voltage at the output terminal given in the
table below is obtained.
(Note that no load resistance is connected to the output terminal.)
PC9501N
63.3 V
Turn VR702 counterclockwise fully, then turn it clockwise gradually and stop turning when "3" of the A ch level meter lights
up. Next, turn VR704 counterclockwise fully, then turn it clockwise gradually and stop turning when "3" of the B ch level meter
lights up.
After that, lower the input voltage by 1 dB and check that "3" of the level meters turn off.
Also check that "27" of the level meters turn off with no input.
30