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 VR714 (ALL Channel) of the AMP PCB counterclockwise(
c
) as far as
possible.
(2) Connect the DC Voltmeter to the test points.
FRONT-Lch
: CN715
FRONT-Rch
: CN725
CENTER ch
: CN735
SURROUND-Lch
: CN745
SURROUND-Rch
: CN755
ASSIGN-2Rch
: CN765
ASSIGN-1Rch
: CN775
ASSIGN-2Lch
: CN785
ASSIGN-1Lch
: CN795
(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 VR714 clockwise (
x
) and adjust the voltage of the test point to "
6.5mV ± 0.5mV DC
" within 2
minutes.
(6) 10 minutes after the preliminary adjustment, turn VR714 and set the voltage to "
8.0mV ± 0.5mV
DC
".
(7) Adjust the variable resistance of each channel using the same method.
CN755
VR754
SR-CH
VR724
CN725
FR-CH
CN735
C-CH
VR734
VR714
CN715
FL-CH
VR744
CN745
SL-CH
VR784
CN785
ASSIGN2 L
VR794
CN795
ASSIGN1 L
VR764
CN765
ASSIGN2 R
VR774
CN775 ASSIGN1 R
SL ch
DC Voltmeter
FL ch
C ch
FR ch
SR ch
ASSIGN1 Rch
ASSIGN2 Rch
ASSIGN1 Lch
ASSIGN2 Lch
5CH AMP PCB
4CH AMP PCB
AMP UNIT
183
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
