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MD-0101 CIRCUIT DESCRIPTION 5 - 2 October 2000 © TOSHIBA TEC
5.2 Meaning of Signals
The ADU cover open switch is a switch which detects the open or close state of the cover. A push switch
is used for the switch. The signal goes LOW when the cover is closed, and HIGH when it is open.
The ADU paper jam sensor (upper/lower) detects the presence or absence of paper in the transfer path.
Photo sensors are used for the sensors. When paper passes, the sensor arm in the transfer path is
pressed to turn on the sensor.
The ADU motor (lower) and ADU motor (upper) are 2-phase excitation PM type pulse motors (stepping
motors) and operate according to the drive signals from the driver IC’s (IC1, IC2).
Signal name Part name Functional description Status Note
ADUFL ADU paper jam Detects the transport of High: Paper present Photo sensor
sensor (Lower) paper (Lower)
ADUFU ADU paper jam Detects the transport of High: Paper present Photo sensor
sensor (Upper) paper (Upper)
ADUCOVSW ADU cover Detection of cover High: Open Push switch
open switch open/close status during
jam processing, etc.
EXMA-D ADU motor Drives the roller to transport - PM type
(Upper) paper (Upper) pulse motor
FDMA-D ADU motor Drives the roller to transport - PM type
(Lower) paper (Lower) pulse motor