Adjustment; Idle Adjustment - Pioneer SX-315 Service Manual

1

6. ADJUSTMENT

6.1 IDLE ADJUSTMENT

A
Idle Current Adjustment
Purpose : If the one of the following TR (Transistor) is replaced, this adjustment is required.
Q206, Q207, Q519-Q522, Q527-Q530, Q538 and Q539
Equipment : Digital voltmeter
Adjustment Name
Front L ch
Front R ch
B
Surround L ch
Surround R ch
Center ch
SubWoofer ch
Procedure
1. Fully turn the adjustment VR counterclockwise.
2. Connect a digital voltmeter to both ends of resistor of the measurement point. (TP1 - TP6)
3. Turn on the power, and perform aging for more than one minute.
4. Slowly turn the adjustment VR clockwise so that the voltage becomes in the range of 2.5mV ± 0.5mV.
C Adjustment Points
D
A
MAIN ASSY
VR502
E
F
42
1
2
Adjustment VR
VR501 (MAIN Assy)
VR502 (MAIN Assy)
VR503 (MAIN Assy)
VR504 (MAIN Assy)
VR505 (MAIN Assy)
VR201 (SW AMP Assy)
H
SW AMP ASSY
TP6 VR201
TP2 TP3
VR503
2
3
Measurement Points
TP1 (R621)
TP2 (R622)
TP3 (R643)
TP4 (R644)
TP5 (R664)
TP6 (R621)
SIDE A
TP5
VR505 VR504
SX-315
3
4
TP4 TP1
VR501
4
SIDE A