Sharp SD-EX101 Service Manual - Page 10

SD-EX100, SD-EX101, Microcomputer output terminal

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SD-EX100 SD-EX101 Control Input/Output The following terminals are used for control. Microcomputer input terminal Name SW_Tray Eject Type H/L SW_Tray Load H/L SW_Mecha Up H/L SW_Mecha Down H/L PH_12cm Disc H/L PH_Tray H/L Sens_Jaming A/Din Descriptions Switch input for tray eject completion detection L: Position "Ejected" H: other positions Switch input for tray loading completion detection L: Position "Loaded" H: other positions Switch input for mechanism up completion detection L: "UpEnd" position H: other positions Switch input for mechanism down completion detection L: "DownEnd" position H: other positions Input of the photo sensor for detecting a 12-cm disc. The sensor detects the disc directly. At the detection position, L : 12-cm disc H : Others (interpreted as 8-cm disc) Input of the photo sensor for detecting the tray position. The tray is covered with a piece of tape. L: a covered tray H: a non-covered tape. Parts not covered, or a slit. Port for overcurrent detection of the mechanism up/down motor Port voltage => 1.65 V: abnormal. Considered as jamming. Port voltage < 1.65 V: normal. Microcomputer output terminal Name TRY_M+ TRY_M- MECHA_M+ Type D Aout D Aout H/L Initial value 0V 0V L MECHA_M+ H/L L Descriptions Control output for tray control motor CW (EJECT direction) Control output for tray control motor CCW (LOADING direction) Control output for mechanism up/down control motor CW (upward, media loaded) Control output for mechanism up/down control motor CCW (downward, media removed) - 10 -

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SD-EX100
SD-EX101
– 10 –
Control Input/Output
The following terminals are used for control.
Microcomputer input terminal
Microcomputer output terminal
Name
Type
Descriptions
SW_Tray Eject
H/L
Switch input for tray eject completion detection
L: Position "Ejected"
H: other positions
SW_Tray Load
H/L
Switch input for tray loading completion detection
L: Position "Loaded"
H: other positions
SW_Mecha Up
H/L
Switch input for mechanism up completion detection
L: "UpEnd" position
H: other positions
SW_Mecha Down
H/L
Switch input for mechanism down completion detection
L: "DownEnd" position
H: other positions
PH_12cm Disc
H/L
Input of the photo sensor for detecting a 12-cm disc. The sensor detects the disc directly.
At the detection position, L
: 12-cm disc
H : Others (interpreted as 8-cm disc)
PH_Tray
H/L
Input of the photo sensor for detecting the tray position. The tray is covered with a piece of tape.
L: a covered tray
H: a non-covered tape. Parts not covered, or a slit.
Sens_Jaming
A/Din
Port for overcurrent detection of the mechanism up/down motor
Port voltage
>
1.65 V: abnormal. Considered as jamming.
Port voltage < 1.65 V: normal.
Name
Type
Initial value
Descriptions
TRY_M+
D Aout
0V
Control output for tray control motor CW (EJECT direction)
TRY_M–
D Aout
0V
Control output for tray control motor CCW (LOADING direction)
MECHA_M+
H/L
L
Control output for mechanism up/down control motor CW (upward,
media loaded)
MECHA_M+
H/L
L
Control output for mechanism up/down control motor CCW
(downward, media removed)
=