Idling Current Adjustment - Marantz PM-11S1/F1N /K1G /L1G /N1G /S1G/N1S Service Manual

Idling Current Adjustment

Digital Voltmeter
R ch
P701
J753
1. After DC Offset Voltage Adjustment is completed, adjust
the Idling Current with the variable resistor R619 and R719
on the PCB (P601/P701).
2. Turn off the power.
3. "+" of Connect Digital Voltage is connected to the No. 1
pin and connected "–" to No. 3 pin of J653.
4. "+" of Connect Digital Voltage is connected to the No. 1
pin and connected "–" to No. 3 pin of J753.
5. Before turning on the power, R619 and R719 have been
counter clockwise turned with the adjustment driver.
6. Turn on the power, VOLUME is set as
7. With seeing the digital voltage meter turn the variable
resister clockwise slowly to adjust the idling current.
• Idling adjustment with R619 (R719).
• Turn R619 (R719) clockwise to increase the idling current.
• The adjustment value of idling current is
11mV(55mA) ±0.5mV(2.5mA) each.
8. After 2 minutes, repeat the same procedure as 7.
• Turn R619 (R719) clockwise to increase the idling
current.
• The adjustment value of idling current is
11mV(55mA) ±0.5mV(2.5mA) each.
Adjustment is completed.
9. Remove connection cable, attach the top cover.
(Idling current decreases with the temperature rise inside the
unit, and it is set to 10mV (50mA) of setting value in about 30
minutes after turn on the power.)
R719
.
3
Digital Voltmeter
L ch
P601
J653
R619