Paper Jam/Error Detection - Sharp MX-CF10 Service Manual

6. Paper jam/error detection

A. List of Paper jams
Description
Not arrived at inserter At a time of separating a sheet
registration sensor
Not arrived at inserter At a time of leading-edge
timing sensor registration
Not arrived at inserter At a time of paper exit in through
paper exit sensor mode
At a time of paper exit in normal
paper feed mode
At a time of paper exit in reverse
paper feed mode
Not arrived at inserter At a time of entering reverse
reverse sensor section
At a time of exiting from reverse
section
Stay at inserter At a time of paper exit in normal
registration sensor paper feed mode
At a time of entering reverse
section in reverse paper feed mode
Stay at inserter timing At a time of paper exit in normal
sensor paper feed mode
At a time of entering reverse
section in reverse paper feed mode
Stay at inserter paper exit At a time of paper exit in through
sensor mode
At a time of paper exit in normal
paper feed mode
At a time of paper exit in reverse
paper feed mode
Stay at inserter reverse At a time of entering reverse
section
sensor
At a time of exiting from reverse
section
B. Error detection
(1) EEPROM errors
Explanation:
1) Timeout error
The EEPROM is being programmed even after a predetermined
time period (150 msec) has passed.
2) Writing error
The written data does not match the read data even when writing
and reading are retried.
3) Reading error
Checking pieces of data read from three sources results in mis-
match even when checking is retried.
Detection timing
A paper jam is detected if the inserter registration sensor is not turned ON, which
means absence of a sheet, even when the inserter paper feed motor has been
driven for a fixed distance after the pickup roller starts to lower.
A paper jam is detected if the inserter timing sensor is not turned ON, which
means absence of a sheet, even when the registration rollers (inserter paper feed
motor) have been driven for a fixed distance after they are started.
A paper jam is detected if the inserter paper exit sensor is not turned ON by the
leading edge of a sheet, which means absence of a sheet, even when the
transport motor has been driven for a fixed distance after the main unit sends a
paper exit command.
A paper jam is detected if the inserter paper exit sensor is not turned ON, which
means absence of a sheet, even when the leading edge of a sheet has traveled a
fixed distance after it reaches the paper exit rollers (horizontal transport rollers 2).
A paper jam is detected if the inserter paper exit sensor is not turned ON, which
means absence of a sheet, even when a sheet has been transported a fixed
distance by the transport motor after the inserter reverse sensor is turned ON,
which means presence of a sheet.
A paper jam is detected if the inserter reverse sensor is not turned ON, which
means absence of a sheet, even when the inserter reverse motor has been driven
for a fixed distance after leading-edge registration.
A paper jam is detected if the inserter reverse sensor is turned ON, which means
absence of a sheet, even when the inserter reverse motor has been driven for a
fixed distance while a sheet is exiting from the reverse section.
A paper jam is detected if the inserter registration sensor is not turned OFF, which
means presence of a sheet, even when the inserter paper feed motor has been
driven for a predetermined amount after a sheet reaches the starting position of
leading-edge registration.
A paper jam is detected if the inserter timing sensor is not turned OFF, which
means presence of a sheet, even when the inserter paper feed motor has been
driven for a fixed distance after the inserter registration sensor is turned OFF,
which means absence of a sheet.
A paper jam is detected if the inserter paper exit sensor is not turned OFF, which
means presence of a sheet, even when the transport motor has been driven for a
predetermined amount after the inserter paper exit sensor is turned ON, which
means presence of a sheet.
A paper jam is detected if the inserter paper exit sensor is not turned OFF, which
means presence of a sheet, even when the transport motor has been driven for a
fixed distance after the trailing edge of a sheet reaches the paper exit rollers
(horizontal transport rollers 2).
A paper jam is detected if the inserter reverse sensor is not turned OFF, which
means presence of a sheet, even when the inserter reverse motor has been
driven for a fixed distance after the inserter timing sensor is turned OFF, which
means absence of a sheet.
A paper jam is detected if the inserter reverse sensor is not turned OFF, which
means presence of a sheet, even when the inserter reverse motor has been
driven for a predetermined amount after the inserter reverse sensor is turned ON,
which means presence of a sheet.
MX-CF10 OPERATIONAL DESCRIPTION 4 - 6
Explanation
(2) Inserter reverse sensor adjustment error
Explanation:
1) When the DA output exceeds the upper limit
Even when the DA output is increased, the AD input value does not
fall within the appropriated range.
2) When the DA output is less than the lower limit
Even when the DA output is decreased, the AD input value does
not fall within the appropriated range.
C. Alarm detection
Explanation:
An alarm is issued because the size of a sheet in the tray cannot be
correctly detected when both the sub tray pullout detection sensor and
the sub tray retraction detection sensor are turned OFF.
Indication:
Shown by a LED on the operator panel of the inserter or of the main
unit as an inserter alarm.