Pioneer pl-530 Service Manual page 40

9. At this point, cam A sets microswitch B to
OFF and TM rotation stops. The cartridge
output shorLing switch opens at the same time
( F ig .7 ) .
(See Fig. 16 for electrical relationships of micro-
switches A and B.)
Fi g.l
10.2 AUTO RETURN
1. At the tonearm approaches the final grooves of
the record, tip screw of plate F contacts plate
G.
2. Plate G moves plate H toward the center shaft
( r ig . 8 ) .
F i s.8
S.While the tonearm stylus moves 1-1.5mm
toward the center with each rotation of the
record, plate H is brushed aside by the platter
pin (Fig. 9).
Irr.,,-53cl
4. When the stulus movement exceeds 3mm per
record rotation, the platter pin ehgages plate H
{rig. 10).
Fis. l0
5. When plate H is moved by the platter pin, plate
J and plate K are moved via plate G, closing
microswitch B and TM operates {Fig. 11).
Fi g. 11
6. Accompanying TM rotation, cam A rotates.
7. Shorting switch shorts the cartridge output and
plate C rotation raises the tonearm from the
record surface.
8. Plate C rotation continues and tonearm is re-
turned to arm rest by plate L above plate C
(rie. 12).
Fi g . l 2
9. At this point, microswitch A is switched OFF
by cam A, cutting off the power supply (Fig.
1 3 ).
(See Fig. 16 for electrical relationships of
microswitches A and B)
Plate C
\- - -
- -
Fi g.9
Microswitch A
Fi g. 1 3