Nad C 372 Service Manual
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Extracted text from Nad C 372 Service Manual (Ocr-read)
Page 2
ALIGNMENT PROCEDURE (C372)
l. INITIAL ADJUSTMENT (No load connected)
A. OUTPUT OFFSET VOLTAGE
1. Connect a DC Millivoltmeter between TP303 and TP304, then adjust VR303
(50kohms) to get a reading of 0V +/-3V so at the speaker terminals of OV+/-30mV.
2. Connect a DC Millivoltmeter between TP403 and TP404, then adjust VR401
(50kohms) to get a reading of 0V +/-3V so at the speaker terminals of 0V+/-30mV.
B. IDLING CURRENT
1. Connect a DC Millivoltmeter to TP301 and TP302, then adjust VR302 (5000hms)
for 5-6mV reading on meter.
2. Connect a DC Millivoltmeter to TP401 and TP402, then adjust VR402 (5000hms)
for 5-6mV reading on meter.
3. Leave power ON for a minimum of 5 minutes.
C. ISC SENSITIVITY
Connect a DC Millivoltmeter to TP701 and TP702, then adjust VR701 (47kohms)
between -50mV to -100mV.
ll. FINAL ADJUSTMENT
Repeat procedure A and B for offset voltage and idling current alignment respectively.
vnsoa VR302
IZ IE IE E
TF303 TF304 TP302 1mm
L E FT C HA N N E L
VR402 VR401
g 12
TP403 TF404
g IZ
TP401 TP402
RIGHT CHANNEL