Akai AS-8100

V. MAIN AMPLIFIER ADJUSTMENT
Fig. 16
AUDIO
OSCILLATOR
OUTPUT
O sae OSCILLOSCOPE
Fig. 17
1. IDLING CURRENT ADJUSTMENT
(See Fig. 16)
Set Mode Switch to “Surround”. Remove fuse from fuse
holder and connect ammeter to both of the fuse termi-
nals (match + and —). Adjust semi-fixed resistor VR-2
(200Q B) to obtain an ammeter indication of 35 mA.
2. OUTPUT WAVEFORM ADJUSTMENT
(See Figs. 17 and 18)
1) Connect Audio Oscillator to the “Aux” input
terminals of Model AS-8100 and connect an 82 :
more
than
45W
dummy
load
resistor
to
the
ie
Res
BeOUIIeY
Fig.
18
speaker output and then connect this terminal to
the oscilloscope vertical input.
2) Turn Volume Control to maximum. Adjust Audio
Oscillator Attenuator to point at which the
speaker output waveform distortion is least and
supply this input voltage to the “Aux” terminal.
3) Adjust semi-fixed volume VR-I (20 KB) so that
the clipping position of the upper and lower parts
of the waveform on the oscilloscope are equal.