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AX-222BK
@ Use of New-type Connector
(1) Slide the cover upward.
(2) Extract the wires.
(3)Insert the wires after pushing
in
the cover.
Adjustment Procedures
@ Power Amplifier Idling Adjustment
Left
Channel
R751
R773
(&))
(+) ~ (-)
. Before tuning on the power, turn the semi-fixed resis-
tors (R751 for L channel and R752 for R channel) of the
power amplifier circuit board fully counterclockwise.
. Adjust the semi-fiexed
resistor (R751
and R752)
so
that the voltage at the following test points of the
power amplifier circuit board is within a range of 3 ~ 5
mV after the power is turned on.
L channel: Measure the voltage between test point ©
(emitter of Q761)
and output at the test
point ©.
R channel: Meaure the voltage between test point ©
(emitter of Q762) and output at the test
point ©.
1-10
(No. 20025)
Right Channel
R752
{wy}
(+) ~ (-)
ENH-094-1
. Readjust resistors R751
and R752 about 10 minutes
after the power is turned on (the heatsink temperature
must be sufficiently high) so that the voltage at the test
points becomes 11 mV.
Confirm that the voltage does not vary when the heat-
sink temperature increases further.
Note: Be sure to perform the measurement
with the
probes and cabinet of the measuring equipment
separated
from
the
grounding
terminals
of
AX-222BK
or other measuring equipment.
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