Read Sharp SD-EX100H (serv.man21) Service Manual online
SD-EX100H
– 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
H: other positions
SW_Tray Load
H/L
Switch input for tray loading completion detection
L: Position "Loaded"
H: other positions
H: other positions
SW_Mecha Up
H/L
Switch input for mechanism up completion detection
L: "UpEnd" position
H: other positions
H: other positions
SW_Mecha Down
H/L
Switch input for mechanism down completion detection
L: "DownEnd" position
H: other positions
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
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.
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.
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)
media loaded)
MECHA_M+
H/L
L
Control output for mechanism up/down control motor CCW
(downward, media removed)
(downward, media removed)
=
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