Read Harman Kardon HK 980 (serv.man5) Service Manual online
harman/kardon
HK 980/230 Service Manual
Page 6 of 50
AMP Adjustment
Idling Adjustment
Precaution for handling measuring
instrument.
The ground side of the measuring
instrument to be connected to the
speaker terminal of this unit must be
kept in floating condition, because
this unit is equipped with floating
balanced power amplifier.
Condition
* Start adjustment 20 minutes or
more after the power is turned on.
* Non-loaded condition.
Idling Adjustment
Adjust VR1 so that the DC voltage of
TP1 becomes +10mV to +11mV.
TP1
VR1
NOTE:
Front and main boards must be matched
correctly as below.
FRONT
MAIN
SW
1.0 (0077-1011-000X) 1.2
1.4
1.1 (0077-1011-0002) 1.2
1.4
1.2 (0077-1011-0003) 1.3 1.5
Serial number cut MAIN 1.3:
FO0001-11844.
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