Toshiba e-STUDIO520 Service Manual page 187

(3) The tandem LCF transport clutch (CLT9) is turned ON to drive the transport roller when the spec-
ified period of time has passed from the start of feeding.
(4) When the leading edge of the paper turns the tandem LCF feed sensor (S46) ON, the tandem
LCF feed clutch (CLT10) is turned OFF and feeding from the tandem LCF is completed.
(5) The paper is transported by the transport roller. If the trailing edge of the sheet previously trans-
ported still remains at the 2nd drawer transport sensor (S39) when the leading edge of the paper
reaches the tandem LCF feed sensor (S46), the tandem LCF transport clutch (CLT9) is turned
OFF to stop the transport of the paper.
(6) When the trailing edge of the paper turns the tandem LCF feed sensor (S46) OFF, the tandem
LCF then becomes ready for feeding the next sheet of paper, and the procedures (2) to (5) are
repeated for the number of the printout.
(7) When printing is completed, the feed motor (M20) is turned OFF.
[D] Jam detection
(1) A paper jam occurs in the following cases.
• Tandem LCF feed sensor (S46) is not turned ON within a specified period of time after the
feeding is started.
• The leading edge of the paper does not pass the tandem LCF feed sensor (S46) in the trans-
port path within a specified period of time.
(2) Open the right lower cover, remove all the paper remaining on the transport path and close the
cover to clear the paper jam. If either of the tandem LCF transport sensor (S45) is still ON when
the right lower cover is closed, it is determined that there is still paper on the transport path and
the paper jam status is not cleared.
(3) When a paper jam occurs in the tandem LCF during continuous copying, the sheet that was fed
before the jam is copied normally.
[E] Call for Service
(1) When the tandem LCF tray-up sensor (S44) is not turned ON even though the specified period of
time has passed since the tray started to be raised, it is assumed that the drawer is not opera-
tional and the corresponding message is displayed on the control panel.
(2) When the tandem LCF bottom sensor (S42) is not turned ON even though the specified period of
time has passed since the tray started to be lowered, it is assumed that the drawer is not opera-
tional and the corresponding message is displayed on the control panel.
(3) When the end fence stop position sensor (S75) is not turned ON even though the specified
period of time has passed since the end fence started to move the paper in the standby side tray,
it is assumed that the tandem LCF is not operational and the corresponding message is dis-
played on the control panel.
(4) When the end fence home position sensor (S73) is not turned ON even though the specified
period of time has passed since the end fence started to move the paper in the standby side, it is
assumed that the tandem LCF is not operational and the corresponding message is displayed on
the control panel.
March 2005 © TOSHIBA TEC e-STUDIO520/600/720/850 PAPER FEEDING SYSTEM
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