Harman Kardon AVR80 - Installation, Set Up & Configuration; Initial System Installation; Audio Input and Output Connections

1 O. Main amp idling current adjustment
1) With the power OFF, set semi - fixed resistor R743
(Leh), R744 (Reh), R786 (Center ch)
on the PC
board (PV04) to the center position.
2) Connect a digital voltmeter, set for the
DC range,
on the emitter resistor [R759 (Leh), R760 (Reh),
R794 (Center ch)]
on the PC board (PV04).
3) After the above, adjust the idling current as follows:
Turn the power
ON and adjust semi - fixed resistor
R743 (Leh), R744 (Reh), R786 (Center ch) while
observing the digital multimeter indication.
The target value is 7.2 mV (20 mA).
All values are with no load on speaker terminals, volume
set to minimum and no input with the unit switched to the
CD position. Always allow the amplifier to stabilize for 1 O
minutes or longer prior to adjusting idle current.
11. Main amp DC offset adjustment
1) With the power OFF, connect a digital voltmeter, set
for the
DC range, to the speaker terminal.
2) After the above, adjust the DC offset as follows:
Turn the power
ON and adjust RN63 (Leh), RN64
(Reh), RN70 (Center ch) so that the output is ±20
mV.
C
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