Toshiba 4580, Руководство по обслуживанию

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Mar. 1999 © TOSHIBA TEC 9 - 31 6570/5570 PAPER FEED SYSTEM
9.4.3 General operation
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Explanation of operation
[A] From power-on to the ready state
(1) When the copier power is switched ON, power is also supplied to the PFP. At this time, the PFP tray
motors (M27), (M28) and (M29) are turned ON in the CCW direction causing each tray to start to rise.
When the rising trays switch on the PFP tray-up switches (S30), (S34) and (S38) (L
→
H), the PFP
tray motors (M27), (M28) and (M29) stop and the trays no longer move. At this time, if the PFP paper-
empty switches (S29), (S33) and (S37) are OFF (L), there is assumed to be no paper and the PFP
tray motors (M27), (M28) and (M29) are switched ON in the CW direction, lowering the trays.
When the PFP paper-empty switches (S29), (S33) and (S37) aer ON (H), it is assumed that there is
paper in the tray and the tray stays in the raised position for two seconds. If there is no copy request
during this time, the tray is lowered.
(2) If the cassette is not inserted when the power is switched ON, the PFP tray motor for that level cannot
be switched ON. When the cassette is inserted, the tray will rise and check for paper.
(3) If any of the PFP paper-stop switches (S27), (S31) or (S35) are ON when the power is switched ON
(meaning that there is paper in the transprot mechanism), the copier goes into a jam state and does
not operate until the paper removed.
[B] Ready state
(1) After the trays are checked for paper by the above tray movements, the copier goes into the ready
state. In the ready state, the trays are left in the lowered position.
(2) If the cassette is removed and inserted while in the ready state, the tray movements are performed to
check for paper.
[C] From copy start to copy completion
(1) When the PRINT key is pressed, the copier sets the CRUN (copier running) signal “H” and turns ON
the developer motor (M16), drum motor (M12), heat roller motor (M18), etc. When the CRUN signal
goes to “H”, the PFP turns ON the selected PFP tray motor (M27), (M28) or (M29) in the CCW
direction and starts to raise the tray. 0.3 seconds after the CRUN signal goes to “H”, the pedestal
motor (M31) is turned ON.
(2) When the rising tray turns ON the PFP tray-up switch (S30), (S34) or (S38), the tray stops. At this
point the paper-ready signal PRDY is returned to the copier (L
→
H).
(3) The copier outputs the RQF (paper feed request) signal (L
→
H).
(4) When the PFP receives the RQF signal, it sets the PRDY signal to “L” (BUSY) and starts to feed
paper.
(5) When the copier detects the PRDY signal state changing to Low, it assumes that the RQF signal was
received, and resets RQF to Low.
(6) The paper is aligned initially by the PFP aligning roller and then is aligned again by the copier’s
aligning roller.
(7) When the trailing edge of the paper passes the PFP paper-start switch (S28), (S32) or (S36), the next
sheet of paper is ready to be fed so the PRDY signal is set to “H”.
If subsequent paper feeding is required, the copier sets the RQF signal to High. This is repeated for
the required number of copies.