Pioneer CX-3195 Service Manual - Page 18

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1
The load/eject operation is controlled with the status changes of the HOME switch (also used for clamp detection) on the
mechanism unit and the three switches on the control unit. The ON/OFF statuses of these switches are respectively
detected at the input port of the microcomputer.
A
Using the detection results in the microcomputer, each status (A to E) is determined. The disc size detection (8 or 12 cm)
is also performed through this status change. Each status is shown in Fig.1.4.3 and the status change in Fig.1.4.4.
Status
DSCSNS
SW1(S903)
8SW
SW2(S905)
12SW
SW3(S904)
HOME
SW4(S901)
Mechanism state
B
Fig.1.4.3 DSCSNS status
LOADING
12 cm
C
DSCSNS
HOME
CLCONT
MOTOR
D
8 cm
DSCSNS
HOME
E
CLCONT
MOTOR
F
18
1
2
A
OFF
ON
ON
OFF
With no disc
12EJ
8EJ
LOEJ
STOP
12EJ
8EJ
LOEJ
STOP
2
3
B
C
ON
ON
ON
OFF
ON
ON
OFF
OFF
LOAD
LOAD
Dead zone
CX-3195
3
4
D
E
ON
ON
OFF
ON
OFF
ON
OFF
ON
Clamp state
SW_ON
SW_OFF
STOP
It changes Load/Carriage
STOP
4