Alignments; Idling Current Adjustment - Marantz PM-15S1 Service Manual

3. ALIGNMENTS

Idling Current Adjustment

Digital Voltmeter
V
R ch
P701
R723
J709
1. Adjust the Idling Current with the variable resistor R623
and R723 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 J609.
4. "-" of Connect Digital Voltage is connected to the No. 1
pin and connected "+" to No. 3 pin of J709.
5. Before turning on the power, R623 and R723 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 R623 (R723).
• Turn R623 (R723) clockwise to increase the idling cur-
rent.
• The adjustment value of idling current is
10mV(50mA) ±0.5mV(2.5mA) each.
8. After 4 minutes, repeat the same procedure as 7.
• Turn R623 (R723) clockwise to increase the idling
current.
• The adjustment value of idling current is
10mV(50mA) ±0.5mV(2.5mA) each.
Adjustment is completed.
9. Remove connection cable, attach the top cover.
1. P601/P701
2.
3. P601
"-"
4. P701
"-"
5.
.
6.
7. P601
• R623
•
"10mV(50mA) ±0.5mV(2.5mA)"
8.
9.
2
R623 J609
R623
OFF
J609
J609
3 "+"
J709
J709
3 "+"
R623
-
J609
R723
"4 " 7.
Digital Voltmeter
V
L ch
P601
R723
1
1
R723
R623