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ADJUSTMENT
Adjusting Idling Current
1. Preparation
(1) Prepare a DC voltmeter.
(2) Place the unit under 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 VR4800 (ALL Channel) of the AMP PCB counterclockwise( c ) as far
as possible.
(2) Connect the DC Voltmeter to the test points.
FRONT-Lch
: TP4800 : VR4800
FRONT-Rch
: TP4802 : VR4801
CENTER ch
: TP4804 : VR4802
SURROUND-Lch
: TP4806 : VR4803
SURROUND-Rch
: TP4808 : VR4804
SURROUND-BACK Lch
: TP4810 : VR4805
SURROUND-BACK Rch
: TP4813 : VR4806
(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
: "---" ( c min.) : turn counterclockwise to the lowest position.
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 to "3.0mV ± 0.5mV
DC".
(7) Adjust the variable resistance of each channel using the same method.
AMP UNIT
DC Voltmeter
SL
FL
VR4800
TP4800
VR4802 TP4804
VR4803
TP4806
F Lch
S L ch
C ch
139
FR
TP4802
SBL
SBR
SR
TP4808
TP4810
C
VR4804
VR4801
VR4806
VR4805
S R ch
F R ch
S Back Lch
TP4813
S Back Rch
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