Power Amplifier Adjustment; Idling Current Alignment; Time Table Of Idling Current Rise - Marantz SR9600 Service Manual

3. POWER AMPLIFIER ADJUSTMENT

Idling Current Alignment

1. Each of the measurement points are provided with the
two test points. Set a digital Voltage meter to DC voltage
input. Connect the meter to the test points at both
contact points.
2. After the setup above, turn on the main switch.
3. Adjust variable resistors (R123, R223...R423) according
to the digital voltmeter readings. The target setting value
is the following table for each channel.
Settings: Mode
Master Volume
Speaker out
Top lid
Power
Power ON after

Time Table of Idling Current Rise

Ambient temperature 20 to 30 degrees centigrade
After Turning ON
The above table is actual survey of Idling Current versus
TIME of this unit.
As for the adjustment, Idling Current becomes 15.0mA in
stable state (it passes more than 30 minutes).
—7.1ch Auto
— Minimum
— No Load
— OPEN
Channel (PWB)
Front L (P114)
Front R (P114)
Center (P214)
Surround L (P114)
Surround R (P114)
Surround Back L (P214)
Surround Back R (P214)
Measurement Voltage (Jxxx)
10 min.
15 min.
20 min.
25 min.
30 min.
40 min.
Idling Current Alignment
1.
2.
3.
R423)
Settings: Mode
Master Volume
Speaker out
Top lid
Alignment Point Measurement Point
R123
R223
R373
R323
R423
R273
R173
20 30°C
Idling Current
1.59mV 15.9mA
1.58mV 15.8mA
1.51mV 15.1mA
1.51mV 15.1mA
1.50mV 15.0mA
1.50mV 15.0mA
(30
15.0mA
10
(R123, R223...
— 7.1ch Auto
— Minimum
— No Load
— OPEN
J132
J232
J382
J332
J432
J282
J182
)