Pioneer XR-A100 Series Service Manual page 28

XR-A100, XR-A100-K
FM/AM TUNER MODULE (AXQ7077)
AM
antenna
terminal
YELLOW
FM
antenna
terminal
5.2 POWER SECTION
7 Adjustment of Vp
Adjust VR1001 in the POWER Assy so that the voltage of Vp checking point W104 is 17.5 ± 0.1V.
Adjustment can be made when no load is applied while the power is turned ON and no signal is sent, as well as for the GND voltage or
for the chassis.
Adjustment is required when the 5volte regurator, IC1001 (NJM78M05FA) in the POWER Assy are replaced.
28
AXX7042
BLACK
L6101
L6105
T6101
L6102
L6104
L6103
Fig. 2 Adjustment Point
POWER ASSY
SIDE A
VP
17.5 ± 0.1V
Fig. 3 Adjustment of Vp
T6201
VP ADJ
VR1001
W104
VR6201