Denon AVR-X4100, Service Manual

Page: 97 / 236

ADJUSTMENT
Adjusting Idling Current
1. Preparation
(1) Prepare a DV voltmeter.
(2) Place the unit in normal usage conditions, away from highly ventilated areas such as next to an air conditioning ma-
chine or electric fan.
The set requires an ambient temperature of 15℃ ~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, VR724, VR734, VR744, VR754, VR764, VR774 of the AMP PCB as far anticlock-
wise(
c
) as possible.
(2) Connect the DC Voltmeter test points.
FRONT-Lch ： CN715
FRONT-Rch ： CN725
CENTER ch ： CN735
SURROUND-Lch ： CN745
SURROUND-Rch ： CN755
SURROUND-BACK Lch ： CN765
SURROUND-BACK Rch ： CN775
(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 ： "---" anticlockwise ( c min.)
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 as "
8.0mV ± 0.5mV DC
".
(7) Adjust the variable resistance of each channel using the same method.
CN775
CN765
CN755
CN745
CN725
CN715
VR774
VR764
VR724
VR754
CN735
VR734
VR714
VR744
FL-CH
SL-CH
C-CH SR-CH FR-CH
SBL-CH
SBR-CH
F Lch S Lch F Rch C ch S Rch S Back Lch S Back Rch
AMP UNIT
DC Voltmeter
97