AL-1530 (serv.man5). AL1530 Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 9

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[5] OPERATIONAL DESCRIPTIONS
1. D-D (Duplex to Duplex) mode
paper/document transport
A. Initial state
Set duplex documents on the document tray.
Set paper on the cassette. (In the duplex mode, the manual feed tray
cannot be selected.)
B. Front copy
Document transport: The document feed roller feeds the document
from the paper feed roller to the PS roller.
→ The document is exposed in the exposure
section, and sent to the document exit section
by the transport/paper exit roller.
→ R-SPF gate solenoid ON
→ The document is sent to the intermediate tray
(but not discharged completely.)
→ The document is stopped once, then
switchback operation is performed. (To the
back copy)
Paper transport:
The document is passed through the paper feed
roller and the PS roller by the paper feed roller
and the images on the front surface are trans-
ferred.
→ The paper is passed through the fusing sec-
tion and the lower side of the gate section to
the paper exit tray side, (but not discharged
completely.)
→ It is stopped once and switchback operation
is performed. (To the back copy)
C. Back copy
Document transport: By switchback operation, the document is sent
through the PS roller to the exposure section,
where the back of the document is exposed.
→ It is sent to the document exit section by the
transport roller and the paper exit roller.
→ R-SPF gate solenoid ON. The document is
sent to the intermediate tray, (but not dis-
charged completely.)
→ It is stopped once and switchback operation
is performed.
→ It is sent through the PS roller and the ex-
posure section (without exposure operation)
to the document exit section.
→ R-SPF gate solenoid OFF
→ The document is discharged to the document
exit tray.
Paper transport:
Switchback operation is performed.
→ The paper is sent through the upper side of
the gate section and the duplex transport sec-
tion, and the PS roller, and the images on the
back are transferred.
→ It is sent through the fusing section and dis-
charged to the paper exit tray.
Gate OFF
Lower Side of Gate
Gate ON
Gate ON
Upper Side of Gate
Gate ON
Gate OFF
AL-1530
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