NAD 314 - Alignment Procedures; Initial Adjustment Procedures; Final Adjustment Procedures

DISASSEMBLY INSTRUCTIONS
1. Remove machine screws M4.0 x 6.0 (@) to @) from the side panels.
Remove tapping screw 3.0 x 8.0 ©) from the back panel.
Refer to Figure No. 1.
Figure No. 1.
Figure No. 2.
2.
Pull both sides of the TOP COVER slightly outwards and tilt approximately, 35° and
then remove in the direction as shown in Figure No. 2.
ALIGNMENT PROCEDURES
INITIAL ADJUSTMENT (No load connected)
A. OUTPUT OFFSET VOLTAGE
1. Connect a DC Millivoltmeter to L Channel speaker output terminals.
2. Turn unit “ON” and adjust RV301 (10 kohms) to get a reading of OV +10 mV.
3. Connect the DC Millivoltmeter to R Channel speaker output terminals and adjust
RV302 (10 kohms) to get a reading of OV +10 mV.
B. IDLING CURRENT
1. Connect a DC Millivoltmeter to TP301 and TP303 and adjust VR303 (1 kohms)
for 5.7 — 6.4 mV reading on meter.
2. Connect a DC Millivoltmeter to TP302 and TP304 and adjust VR304 (1 kohms)
for 5.7 — 6.4 mV reading on meter.
3. Leave power “ON” for minimum of 5 minutes, and check 1 and 2 for correct reading.
FINAL ADJUSTMENT
VR 304
RIGHT IDLING CURRENT ADJ.
RV 302
RIGHT OFFSET VOLTAGE ADJ.
TP 304
MEASURES RIGHT IDLING CURRENT
TP 302
MEASURES RIGHT IDLING CURRENT
TP 303
MEASURES LEFT IDLING CURRENT
TP 301
MEASURES LEFT IDLING CURRENT
V 301
LEFT OFFSET VOLTAGE ADJ.
Vv
LEFT IDLING CURRENT ADJ.
$s wD
8 w
Repeat procedure A and B for offset voltage and idling current alignment
respectively.