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ALIGNMENT
METHOD
AUDIO
SECTION
3300
IMPORTANT
Speaker
Impedance
switch
should
be
in
8 ohm
position
while
adjusting
center
volatge
and
idling
current.
INITIAL
ADJUSTMENT
(No
load
connected)
A.
CENTER
VOLTAGE
1.
Connect
DC
millivoltmeter
to
L
channel
output
terminals.
2.
Turn
on
and
adjust
to
0
V
+
30mV
with
VR
5(10Kohm).
Connect
DC
millivoltmeter
to
R
channel
output
terminals
and
adjust
VR
6 to
0 V +
306mvV.
B.
IDLING
CURRENT
ts
Connect
DC
millvoltmeter
across
R289
(0.22
ohm,
TP1,
TP2
output
transistor
s
collector
resistor)
and
adjust
VR
7
for
6
-
7.2mvV
ow
Feading.on.
meter.
Repeat
adjust
with
VR
8,
connecting
meter
across.
R290(0.22
ohm,
TP4,
TP5)
2.
Leave
power
on
for
minimum
30
minutes.
FINAL
ADJUSTMENT
C.
CENTER
VOLTAGE
1.
Repeat
step
A
above.
D.
IDLING
CURRENT
1.
Repeat
step
B
and
adjust
with
VR
7,
VR
8
for
6.6mV
reading
on
meter.
--
5
--
ALIGNMENT
METHOD
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