Marantz SR7000, Service Manual

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58
1. DC offset adjustment
Master Volume : Minimum, Speaker out : non Load
Step Power Channel
Adjustment
Point
Test Point Adjustment Vaule
Front L R767
Center RT67
Front R R768
Surr. L RP67
1 on
Surr. R RT68
Speaker Output
Terminal
20mV
±
Note : If the measured value is not exceed ±50mV, no need to adjust the DC offset.
2. Iding current adjustment
Master Volume : Minimum, Speaker out : non Load
Step Power Channel
Adjustment
Point
Test Point
Adjustment
Vaule
Front L R737 J706(1p-2p) or R761
Center RT67 J706(3p-4p) or RT61
Front R R738 J707(3p-4p) or R762
1 Power on
Surr. L RP37 J708(3p-4p) or RP61
The center
position
Surr. R RP38 J707(1p-2p) or R762
2
after
4 minutes
J***:4P Connecter
[between 1p-4p]
R***:Emitter Resister
see table
for adjustment
vaule
Time since power on Idling current adjust.
1 minutes
1 minutes 30 seconds
2.8 - 3.4 mV
3.8 - 4.4 mV
4.8 - 5.6 mV
5.6 - 6.2 mV
6.2 - 6.8 mV
6.8 - 7.4 mV
2 minutes
2 minutes 30 seconds
3 minutes
More than 4 minutes
9. ELECTRICAL ADJUSTMENTS