Adjustment - Marantz NR1606/U1B Service Manual

Av surround receiver
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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)
• SPEAKER (Speaker terminal)
(Do not connect equipment such as speakers or dummy resistors.)
2. Adjustment Procedure
(1) Remove the top cover and turn VR4800, VR4801, VR4802, VR4803, VR4804, VR4805, VR4806 of the AMP PCB counter-
clockwise( c ) as far as possible.
(2) Connect the DC Voltmeter to the test points.
FRONT-Lch
FRONT-Rch
CENTER ch
SURROUND-Lch
SURROUND-Rch
SURROUND-BACK Lch
SURROUND-BACK Rch
(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
SPEAKER (Speaker terminal)
(Do not connect equipment such as speakers or dummy resistors.)
MODE
FUNCTION
(5) Turn VR4800 clockwise ( x ) and adjust the voltage of the test point to "2.0mV ± 0.5mV DC" within 2 minutes.
(6) 10 minutes after the preliminary adjustment, turn VR4800 and set the voltage to "3.0mV ± 0.5mV DC".
(7) Adjust the variable resistance of each channel using the same method.
DC Voltmeter
VR4800
TP4800
FL
F Lch
: TP4800
: TP4802
: TP4804
: TP4806
: TP4808
: TP4801
: TP4813
: ( c min.) : turn counterclockwise to the lowest position.
: No load
: MCH STEREO
: DVD
AMP UNIT
SL
C
TP4806
VR4803
VR4802
TP4804 VR4804
S L ch
C ch
STANDBY
No load
FR
SR
VR4801
TP4808
S R ch
69
SBL
SBR
TP4802
TP4810 VR4806
VR4805
F R ch
S Back Lch
TP4813
S Back Rch

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