Pioneer PD-J900M Service Manual page 70

PD-Z74T
with the main cam rotation to move the float base vertically. The
side of the main cam respectively. The left follow gear
drives tray I via gear I and the right follow gear drives tray
II via gear II.
As shown in Fig. 3-9, when tray I is in OPEN position, the
left follow gear is engaged with the main cam gear. The
non-toothed sections of the right follow gear and the main
cam face each other, and the follow gear does not rotate.
Therefore, when the motor rotates to tray I CLOSE direction
(main cam rotates counterclockwise), only the left follow
gear is driven to tray I to CLOSE direction. At this time,
tray II is in the PLAY position.
Loading motor
Follower (rig ht
Main cam
Follower (left)
Gear |
3.4 TRAY POSITION DETECTION
The mechanism for tray position detection is shown in Fig. 3-8. Tray |
The tray position is detected by the tips of three plastic springs,
which are located on the loading base to follow the change of
diameter in two grooves on the rear side of the main cam, and the
ON/OFF condition of three switches located on the mechanism
board.
TRY 2
switch TSEL
open position from close position.
When tray 2 is in play position,
indicates that tray 1 is between
close position and open posit n.
When tray 2 is in play position,
| CLOSE | PLAY L_ | indicates that tray 1 is at close
position.
When there is transition from © to
1® ®, indicates that there is move-
ment in progress with tray 1 to play
position and tray 2 to close position.
When there is transition from ® to
@, indicates that there is move-
ment in progress with tray 1 to close
3
position and tray 2 to play position.
Indicates that tray 1 is in play
Fig. a
oc00g
a
ee ais satis
eae
OPEN When tray 1 is in play position,
PLAY CLOSE indicates that tray 2 is between
close position and open positis n.
When tray 1 is in play position,
®} PLAY L L L_ | indicates that tray 2 has arrivecd in
12
open position.