Adjustment - Marantz NR1504 /U1B Service Manual

ADJUSTMENT

Audio Section
Adjusting Idling Current
Required measurement equipment: DC Voltmeter
1. Preparation
(1) Temperature should be at avoid direct blow from an air conditioner or an electric fan and humidity should be moderate,
and place the set at normal usage environment.
15 °C ~ 30 °C (59 °F ~ 86 °F)
(2) Presetting
• POWER (Power source switch)
• SPEAKER (Speaker terminal)
(Do not connect speaker, dummy resistor, etc.)
2. Adjustment
(1) Remove the top cover and set VR4800,VR4801,VR4802,VR4803,VR4804 on at fully 5CH AMP UNIT at fully
counterclockwise ( c ) position.
(2) Connect DC Voltmeter to test points (FRONT-Lch: TP4800, FRONT-Rch: TP4802, CENTER ch: TP4804,
SURROUND-Lch: TP4804, SURROUND-Rch: TP4808).
(3) Connect the power cord to AC Line, and set the power switch to "ON".
(4) Presetting.
MASTER VOLUME
SPEAKER (Speaker terminal) : No load
(Do not connect speaker, dummy resistor, etc.)
MODE
FUNCTION
(5) Within 2 minutes after the power on, turn VR401 clockwise ( x ) to adjust the TEST POINT voltage to
2.0mV ± 0.5mV DC.
(6) After 10 minutes from the preset above, turn VR401 to set the voltage to 3.0mV ± 0.5mV DC.
(7) Adjust the Variable Resistors of each channel in the same way.
VR4800
TP4800
F L ch
DC Voltmeter
STANDBY
No load
: "---" counterclockwise ( c min.)
: MCH STEREO
: DVD
5CH AMP UNIT
VR4803
VR4802
TP4806
S L ch
VR4801
VR4804
TP4804 TP4808
C ch S R ch
70
VR4806
VR4805
TP4802
TP4810
F R ch
TP4813