Alignment Procedure - NAD C 325BEE Service Manual

I. INITIAL
A. LOWEST VOLUME ADJUSTMENT
1. Tune the volume pot to lowest state.
2. Input a high voltage signal such as 5V from CD input.
3. Connect a oscilloscope to L channel binding posts.
4. Observing the oscilloscope,adjust VR301,make the output of speakers become to the
lowest level.
5. Adjusting VR302,make R channel output become to the lowest level by same way.
B. IDLING CURRENT
1. Level power on for a minimum of 5 minutes
2. Connect a DC voltmeter toTP1 and TP2 ,adjust VR22 for 4mV reading on voltmeter.
3. Connect a DC voltmeter toTP3 and TP4 ,adjust VR12 for 4mV reading on voltmeter.
C.ISC CIRCUIT ORIGINAL ADJUSTING
Adjust the pot VR3 to make the DC voltage of the point of TP10 to the same as TP11
II. FINAL ADJUSTMENT
Repeat procedure A,B and C for the lowest volume level, idling current alignment
and ISC original level respectively.
ALIGNMENT PROCEDURES
C325BEE MAIN BOARD
TP1
VR22
TP2
TP3
VR12
TP4
15
TP10 TP11
VR3
VR302
VR301
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