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)
OFF
• 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 Lch"
V5001
" and Rch"
V5002
" of the AMP PCB counterclockwise(
c
)
as far as possible.
(2) Connect the DC Voltmeter to the test points.
Lch : N5001
Rch : N5002
(3) 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.)
(4) Connect the power cord to an outlet. Next, press the power button to turn on the power.
(5) Once the power is on, rotate "
V5001
" and "
V5002
" clockwise (
x
) and adjust the test point voltage to
"
10mV ± 2mV DC
".
(6) 2 minutes after the preliminary adjustment, turn
V5001
, "
V5002
" and set the voltage to "
10mV ±
1mV DC
".
(7) 10 minutes after the preliminary adjustment, turn
V5001
, "
V5002
" and set the voltage to "
10mV ±
1mV DC
".
Volume
DC Voltmeter
Power Amp P.W.B.
V5001
Trans
Trans
N5001
N5002
V5002
53
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
