Marantz SR5600, Service Manual

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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 (VR41, VR42…VR71) according to the digital voltmeter readings. The target setting value is
the following table for each channel.
Settings: Master Volume — Minimum
Speaker out — No Load
Top lid — OPEN
Channel Alignment Point Measurement Point
Front L VR41 CN41
Center VR61 CN61
Front R VR51 CN51
Surround L VR42 CN42
Surround R VR52 CN52
Surround Back L VR62 CN62
Surround Back R VR71 CN71
Time Table of Idling Current Rise
After Turning ON
Ambient temperature
10 to 19 degrees centigrade
Ambient temperature
20 to 30 degrees centigrade
Measurement Voltage Measurement Voltage
5 min. 1.2 mV ± 0.3 mV 2.0 mV ± 0.3 mV
10 min. 1.2 mV ± 0.3 mV 2.1 mV ± 0.3 mV
20 min. 1.4 mV ± 0.3 mV 2.5 mV ± 0.3 mV
30 min. 1.6 mV ± 0.3 mV 2.7 mV ± 0.3 mV
40 min. 1.7 mV ± 0.3 mV 2.9 mV ± 0.3 mV
50 min. 1.8 mV ± 0.3 mV 3.1 mV ± 0.3 mV
60 min. 1.9 mV ± 0.3 mV 3.2 mV ± 0.3 mV