ALIGNMENT PROCEDURE (C372)
I. 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 0V+/-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 (500ohms)
for 5-6mV reading on meter.
2. Connect a DC Millivoltmeter to TP401 and TP402, then adjust VR402 (500ohms)
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.
II. FINAL ADJUSTMENT
Repeat procedure A and B for offset voltage and idling current alignment respectively.
VR303 VR302
TP303 TP304TP302TP301
LEFT CHANNEL
VR402VR401
TP403 TP404
TP401TP402
RIGHT CHANNEL |