A D J U S T M E N T; Auto-Return Adjustment; Motor Adiustment; Arm-Elevation Adjustment - Pioneer PL-100 Service Manual

8. Plate B continues to move toward the center
shaft and pushes against pin C on lever B. Lever
B thus switches the microswitch off (power
off), and is then locked by lever A, thereby
bringing a complete operation cycle to an end.
Fig. 4-9 Auto-return detection 2
5 . A D J U S T M E N T
5.1 AUTO.RETURN ADJUSTMENT
1. Turn the auto return
adjustment screw full
around clockwise.
2. Move the tonearm
right across toward
the
center.
3. When the auto return adjustment screw is
turned back a little at a time counter clockwise,
the tonearm will commence to return to the
outer circumference.
4. Stop tuming the adjustment screw once the
stylus tip is 33mm away from the center shaft.
5. Once the above adjustment procedure has been
completed check that the tonearm returns auto-
matically as designed.
5.2 F.G. MOTOR ADJUSTMENT
1. Twn the power on and start the turntable plat-
ter rotating.
2. Turn the speed adjustment knob around to the
mechanically center position.
3. Adjust VR2 and VRB in the motor assembly
so that the stroboscope appears to be stationary.
Again this adjustment is performed from below.
4. Adjust VR2 for 33rpm speed, and VRB for
45rpm.
5.3 ARM-ELEVATION ADJUSTMENT
To proceed with the elevation sheet height
adjustment, insert the hexagonal wrench (for 3
mm) into the hole at the front of the EV sheet and
rotate it clockwise to reduce the height and coun-
ter-clockwise to increase the height.
The height
of the stylus tip from the record surface is 7
+ 2 m m .
Fis. 5-2
Motor adjustment
Elevation sheet
Fig. 5-1 Auto return adjustment
Fig. 5-3 Armclevation adjustment