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
(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) Check whether the voltage is within the range "
2.0mV +2mV/-1mV DC
" 10 minutes after adjust-
ment.
(7) Adjust the variable resistance of each channel using the same method.
TP4800
VR4800
TP4806
VR4803
VR4802 TP4804
VR4804
TP4808
VR4801
TP4802
VR4805
TP4810
VR4806
TP4813
FL
SL
C
SBR
SR
SBL
FR
F Lch
S L ch
C ch
S R ch
F R ch
DC Voltmeter
AMP UNIT
136
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
