36
TAD-M600
1
2
3
4
A
B
C
D
E
F
1
2
3
4
8. EACH SETTING AND ADJUSTMENT
8.1 CD ADJUSTMENT
C
N
403, C
N
453 (3P
NV
pin)
1: O
V
LD+
2: AMP OUT+/-
3:
N
C
Jigs for measurement: 3P
NV
connector
Measurement points: Measure the voltage between pin 1
and pin 2.
C
N
403, C
N
453 (3P
NV
pin)
1: O
V
LD+
2: AMP OUT+/-
3:
N
C
Jigs for measurement: 3P
NV
connector
Measurement points: Measure the voltage between pin 2
and
G
N
D.
V
R202
Amp-
Idle
adjustment
V
R102
Amp+
Idle
adjustment
V
R101
Amp+
DC offset
adjustment
V
R201
Amp-
DC offset
adjustment
C
N
403
TP for Amp +
Idle current and
DC offset
measurement
C
N
453
TP for Amp -
Idle current and
DC offset
measurement
Max
Min
DC OFFSET VOLTAGE AND IDLE CURRENT ADJUSTMENTS
[Adjustments Procedure]
[Adjustment Points]
[Measurement Points]
V
OLTAGE AMP U
N
IT
POWER AMP U
N
IT
(1) Fully turn the
V
R102 and
V
R202 semifixed resistors
counterclockwise (for setting the idle current to
minimum) before turning on the unit.
(2) Turn on the unit with no load and no signal input.
(3) Adjust the
V
R101 and
V
R102 semifixed resistors for DC
offset adjustment so that the DC offset voltages for
AMP+ and AMP- become 0 m
V
± 20 m
V
.
(4) Adjust the
V
R102 and
V
R202 semifixed resistors for idle
current adjustment so that the voltages at the end of the
emitter resistor for AMP+ and AMP- become
11
m
V
± 3 m
V
.
(5) Let the unit sit for 30 minutes under windless conditions.
(6) Adjust the
V
R102 and
V
R202 semifixed resistors for idle
current adjustment so that the voltages at the end of the
emitter resistor for AMP+ and AMP- become
15
m
V
± 3 m
V
.
(7) Adjust the
V
R101 and
V
R102 semifixed resistors for DC
offset adjustment so that the DC offset voltages for
AMP+ and AMP- become 0 m
V
± 20 m
V
.
When measuring the idle current
(the voltages at the end of the emitter resistor)
When measuring the DC offset voltage
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