Paper Jam/Error Detection - Sharp MX-CFX1 Service Manual

6. Paper jam/error detection

A. List of Paper jams
Description
Not arrived at registration At a time of separating a sheet
sensor
Not arrived at timing sensor At a time of leading-edge registration
Not arrived at paper exit At a time of paper exit in through mode
sensor
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 reverse sensor At a time of entering reverse section
At a time of exiting from reverse
section
Stay at registration sensor At a time of paper exit in normal paper
feed mode
At a time of entering reverse section in
reverse paper feed mode
Stay at timing sensor At a time of paper exit in normal paper
feed mode
At a time of entering reverse section in
reverse paper feed mode
Stay at paper exit sensor At a time of paper exit in through 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 reverse sensor At a time of entering reverse section
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 predeter-
mined time period (150 msec) has passed.
2) Writing error
The written data does not match the read data even when writ-
ing and reading are retried.
3) Reading error
Checking pieces of data read from three sources results in
mismatch even when checking is retried.
(2) 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.
Detection timing
A paper jam is detected if the registration sensor is not turned ON, which means absence of a
sheet, even when the paper feed motor has been driven for a fixed distance after the pickup
roller starts to lower.
A paper jam is detected if the timing sensor is not turned ON, which means absence of a
sheet, even when the registration rollers (paper feed motor) have been driven for a fixed
distance after they are started.
A paper jam is detected if the 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 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 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 reverse sensor is turned ON, which means presence of a sheet.
A paper jam is detected if the reverse sensor is not turned ON, which means absence of a
sheet, even when the reverse motor has been driven for a fixed distance after leading-edge
registration.
A paper jam is detected if the reverse sensor is turned ON, which means absence of a sheet,
even when the 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 registration sensor is not turned OFF, which means presence of
a sheet, even when the 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 timing sensor is not turned OFF, which means presence of a
sheet, even when the paper feed motor has been driven for a fixed distance after the
registration sensor is turned OFF, which means absence of a sheet.
A paper jam is detected if the 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
paper exit sensor is turned ON, which means presence of a sheet.
A paper jam is detected if the 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 reverse sensor is not turned OFF, which means presence of a
sheet, even when the reverse motor has been driven for a fixed distance after the timing
sensor is turned OFF, which means absence of a sheet.
A paper jam is detected if the reverse sensor is not turned OFF, which means presence of a
sheet, even when the reverse motor has been driven for a predetermined amount after the
reverse sensor is turned ON, which means presence of a sheet.
MX-CFX1 OPERATIONAL DESCRIPTION 5 – 7
Explanation
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.