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
℃
~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 VR4800, VR4801, VR4802, VR4803, VR4804, VR4805, VR4806 of the AMP PCB as
far anticlockwise(
c
) as possible.
(2) Connect the DC Voltmeter test points.
FRONT-Lch
：
TP4800
FRONT-Rch
：
TP4802
CENTER ch
：
TP4804
SURROUND-Lch
：
TP4806
SURROUND-Rch
：
TP4808
SURROUND-BACK Lch
：
TP4801
SURROUND-BACK Rch
：
TP4813
(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 VR4800 clockwise (
x
) and adjust the voltage of the test point to "
2.0mV ± 0.5mV DC
" within 2 minutes.
(6) 10 minutes after the preliminary adjustment, turn VR4800 and set the voltage as "
3.0mV ± 0.5mV DC
".
(7) Adjust the variable resistance of each channel using the same method.
F Lch S L ch C ch S R ch F R ch S Back Lch S Back Rch
VR4803
TP4800
TP4806
VR4802
TP4804 VR4804
C
SR
SL
FL
VR4800
TP4808
TP4802
VR4801
VR4805
TP4810
VR4806
TP4813
SBR
SBL
FR
DC Voltmeter
AMP UNIT
73
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