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6. IDLING CURRENT ALIGNMENT
1. Each of cement resistor R769(on the PCB P101:Lch) and
cement resistor R770(on the PCB P101:Rch) are provided
with three test points. Connect the digital voltage meter,
set for the DC voltage input, to the test points at the two
extremities of three test points of R769(L ch) and R770(R
ch).
2. After the setup above, turn the mains switch ON and
heat up the amplifier about 10 minuetes.
3. Adjust variable resistors R751(on the PCB P101:L
ch) and R752(on the PCB P101:R ch) according to
the digital volt meter reading. The target setting
value is 10mV 1mV(50mA) for both L ch and R ch.
Measurement point
R769 / R770
18
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