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9. ADJUSTMENTS
Power Amplifier
Turn
VR,,
VR, (L) and VRs,
VRio (R) fully
around in the counter-clockwise direction, but set
VR, (L)
and
VR,(R)
to
the
center
positions.
Without any load or input signal, turn the POWER
switch ON.
DC Balance
1. Adjust
VR; (L) for OV (to within
+30mV)
between terminal No.15 and ground.
2. Adjust
VR,.(R)
for
OV (to within
+30mV)
between terminal No.20 and ground.
Idle Current
1. Adjust VR,(L)
for 56mV
between
terminals
TP, (+) and TP; (—). The potential difference
between terminals TP, (+) and TP, (—) should
register about 56m V at this time.
2. Adjust VR, (R) for 56mV between terminals
TP, (+) and TP; (—). The potential difference
between
terminals TP,(+) and TP, (—) should
register about 56m V at this time.
3. Adjust VR,.(L)
for 70mV
between
terminals
TP, (+) and TP;(—). The potential difference
between
terminals TP,(+) and TP,(—) should
register about 70mV at this time.
4, Adjust VRio (R) for 70mV between terminals
TP, (+) and TP, (—). The potential difference
between
terminals TP; (+) and TP, (—) should
register about 70mV at this time.
Output Power Indicator Calibration
1. Apply a 1kHz signal to the POWER
AMP IN
terminals (or any other input power amplifier
input terminals).
2. Adjust the level of this input signal so that the
voltage on the output terminals (SPEAKERS)
read 8.9V (AC).
3. Adjust VR, (L) and VR, (R) so that the output
power indicator read 10 watts.
Indicator
assembly
VRIPW
VRGOe
193
SA-8800
2
1 O . EX P LODE
D
Vi EW
a
marked parts cannot be supplied.
e
The A\ mark found on some
component parts indicates
the importance
of the safety factor of the part. There-
fore,
when
replacing,
be sure
to use parts of identical
designation.
Wooden cover
ABA-206
_
Za
;
io
Washer faced screw
é
'i
ABA-206
Front panel
ANB-685
ae
a
Ry
Re
@
a
AAB-196
a"
|
2
B71-004
"
washer M9
aaa
Knob (FUNCTION)
AAB-195
Screw 3x6
ABA-228
;
Screw 3x6
Foot
ABA-228
AEC-178
7
east
0
|
AEC-178
Screw 4x12
Screw 3x6
;
ABA-196
ABA-228
Screw 4x12
ABA-196
20.
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