Circuit Description; Meaning Of Signals - Toshiba MY-1015 Service Manual

5. CIRCUIT DESCRIPTION

5.1 Meaning of Signals

Signal Name Part Name
PFUCOV PFU cover open
switch
SIZPFU0 PFU cassette
switch
PFUTUP PFU pickup
sensor
PFUPEMP PFU paper
empty sensor
PFUPCLT PFU pickup
clutch
PFUTRM-A, B PFU tray-up
motor
The PFU cover open switch 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 PFU cassette switch is a switch which detects the open or close state of the cassette. A push switch
is used for the switch. The signal goes LOW when the cassette is mounted, and HIGH when it is open.
The PFU pickup sensor is a switch which detects the lift-up of the cassette. A photo sensor is used for the
switch. Paper feed is enabled when the signal is at "High" level.
The PFU paper empty sensor detects the presence or absence of paper. A photo sensor is used for the
sensor. There is no paper when the signal is at "High" level.
PFU pickup clutch is an operation signal for the feed clutch and drives the magnetic clutch. Driving force
is transmitted to the pickup roller when the signal is at "Low" level.
The PFU tray-up motor lifts the tray of the cassette. The combination of the two signals permits setting of
lifting, braking, and OFF.
October 2000 © TOSHIBA TEC
Functional Description
Detects the open/close
state of the cover during
jam processing, etc.
Detects the open/close
state of the cassette.
Detects the lift-up of the
cassette.
Detects the presence or
absence of paper placed
in the PFU cassette.
Operation signal for feed
clutch.
Lifts up the tray of the PFU
cassette.
5 - 1
Status
High: Open
Low: Cassette present
High: Paper feed
enabled
High: Paper absent
Low: ON
Low, High = Up
MY-1015 CIRCUIT DESCRIPTION
Note
Push switch
Push switch
Photo sensor
Photo sensor
Magnetic clutch
Brush motor