NAD 902 - Schematic Diagram; Amplifier Circuit Diagram

AMPLIFIER
ADJUSTMENT
EXPLODED
VIEW
2 0423 Q424-: 2
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P403
:
R456
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Q418
Q414
Q420
c=
VR448
R458
P404
Q415
es
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OUY
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VR447
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P402
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Q403 D
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DUTPUT
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DUTPUT
P4095
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INPUT W501. SA W502
A. IDLE CURRENT ADJUSTMENT
1. Connect DMM across P-401 (+) and P-403 (-), adjust VR-447 for reading of
5mV +/- 0.56mV DC.(without a load across the output terminals.)
2. Repeat, using P-402 (+) and P-404 (-), adjust VR-448.
3. Repeat above procedures for each amplifier module.
B. FINAL ADJUSTMENT
1. Leave power on minimum 5 minutes.
2 Repeat idle current adjustments.