Harman Kardon HK 990/230 Service Manual page 7

AMP Adjustment
Iding 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 equiped with
the floating balanced power
amplifier.
Condition
* Start adjustment 5 minutes or
more after the power is turned on.
* Non loaded condition.
Idling Adjustment
Adjust R53 so that the DC voltage
of TP1 becomes +38mV .
5
R53
TP1