ADJUSTMENT
Adjusting Idling Current
1. Preparation
(1) Prepare a DV voltmeter.
(2) Place the unit in normal usage conditions, away from highly ventilated areas such as next to an air conditioning
machine or electric fan.
The set requires an ambient temperature of 15
℃
to 30
℃
and standard humidity.
(3) Settings of This Unit
• POWER (Power source switch) STANDBY
• SPEAKER (Speaker terminal) No load
( Do not connect equipment such as speakers or dummy resistors. )
2. Adjustment Procedure
(1) Remove the top cover and turn VR401, VR402, VR403, VR404, VR405, VR406 and VR407 of the 7CH AMP UNIT as
far anticlockwise(
c
) as possible.
(2) Connect the DC Voltmeter test points.
FRONT-Lch
：
TP401
FRONT-Rch
：
TP402
CENTER ch
：
TP403
SURROUND-Lch
：
TP404
SURROUND-Rch
：
TP405
SURROUND-BACK Lch
：
TP406
SURROUND-BACK Rch
：
TP407
(3) Connect the power cord to an outlet. Next, press the power button to turn on the power.
(4) Set this unit as follows.
MASTER VOLUME : "---" anticlockwise (
c
min.)
SPEAKER (Speaker terminal)
：
No load
( Do not connect equipment such as speakers or dummy resistors. )
MODE
：
MCH STEREO
FUNCTION
：
DVD
(5) Turn VR401 clockwise (
x
) and adjust the voltage of the test point to "
6.0mV ± 0.5mV DC
" within 2 minutes.
(6) 10 minutes after the preliminary adjustment, turn VR401 and set the voltage as "
8.0mV ± 0.5mV DC
".
(7) Adjust the variable resistance of each channel using the same method.
F Lch
S Lch
F Rch
C ch
S Rch
S Back Lch
S Back Rch
DC Voltmeter
TP401
VR404
TP404
VR403
VR405
TP405
VR402
TP402
VR407
TP406
VR401
VR406
TP403
TP407
AMP UNIT
76
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