Explanation Of Circuits; Interface Signals; Signals From The Copier To The Paper Feeding Unit; Signals From The Paper Feeding Unit To The Copier - Toshiba 1550 Service Manual

13.6 Explanation of Circuits

13.6.1

Interface signals

[A] Signals from the copier to the paper feeding unit (PFU):
(1) RGT-CLT2
Drives the transport roller clutch.
When the signal is "L", the clutch (RGT2-CLT) energizes.
(2) PKUP-CLT2
Drives the pick-up clutch.
When the signal is "L", the pick-up roller clutch (PKUP2-CLT) energizes.
(3) FED-CLT2
Drives the paper feed roller.
When the signal is "L", the clutch (FED2-CLT) energizes, causing the paper feed roller to start rotat-
ing.
(4) MOT-ON2
Rotates the drive motor.
When the signal is "L", the drive motor (PFU-MOT) starts rotating.
[B] Signals from the paper feeding unit (PFU) to the copier:
(1) CST2 (installation)
Tells the copier that PFU is installed. The signal becomes "L" with PFU installed.
(2) DR-SW2 (door switch)
Indicates whether or not the PFU's side cover is open. When the cover is closed, the door switch is
turned on, causing the signal to become "L".
(3) FED-SW2 (paper stop switch)
Indicates the status of the PFU's paper stop switch. When there is paper on the paper stop switch, it
is turned on, causing the signal to become "H".
(4) EMP-SW2 (paper empty switch)
Indicates whether or not there is paper in the PFU's cassette. When there is paper, the paper empty
switch is turned on, causing the signal to become "L".
(5) SIZ13 - 10 (Paper size switches)
Indicate the size of the cassette. When the size mark plate pushes the switches, the corresponding
paper size signal becomes "L".
1550/1560 OPTIONAL 13 - 20 Mar. 1998 © TOSHIBA