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 VR401 (ALL Channel) of the AMP PCB counterclockwise(
c
) as far as
possible.
(2) Connect the DC Voltmeter to the test points.
FRONT-Lch
: CP501
FRONT-Rch
: CP502
CENTER ch
: CP503
SURROUND-Lch
: CP504
SURROUND-Rch
: CP505
SURROUND-BACK Lch
: CP506
SURROUND-BACK Rch
: CP507
(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 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 to "
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
CP501
VR404
CP504
VR403
VR405
CP505
VR402
CP502
VR407
CP506
VR401
VR406
CP503
CP507
AMP UNIT
144
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
