Specifications

5-3. Watchdog Function Post-Processing
The following processing is performed if a faulty condition is detected in the
CPU. The Watchdog Counter available from the Tech. Rep. mode allows the
Technical Representative to check if any faulty condition has occurred in the
CPU. For details, see SWITCHES ON PWBs.
Faulty CPU Processing (in Standby)
Processing
(during Copy Cycle)
Copier
Sorter,
Staple Sorter
1 : The CPU is automatically reset (i.e.,
shutting down power to all CPUs
including those in the options) as
soon as a faulty CPU is detected.
1: Same as 1 on the left.
2: Since the paper is left
inside the copier, the
copier detects a misfed
sheet of paper or two
when power is turned
ON again. If the MSC
CPU is faulty, however,
all paper in line for the
exit will be ejected and
all paper headed to the
duplex will be stored,
before restarting the
CPU.
1 : When the CPU malfunctions, the
communication to Master Board
PWB-A of the copier is cut off or
faulty data is transmitted to the
PWB-A.
2 : The PWB-A detects that the CPU of
the Sorter or Staple Sorter is faulty.
3 : The PWB-A notifies MSC Board
PWB-B that the CPU of the Sorter or
Staple Sorter is faulty.
4 : As commanded by the PWB-B,
Option Relays RY3C and 4C are
turned OFF and ON to restart the
option.
5 : The communication line from the
CPU of the Sorter or Staple Sorter to
PWB-A is recovered.
6 : PWB-A notifies PWB-B that the CPU
of the Sorter or Staple Sorter has
recovered from the faulty condition.
1 : Same as 1, 2, and 3 on
the left.
2 : The paper take-up
sequence is stopped.
3 : All sheets of paper
being fed through the
copier are fed out of
the copier.
4 : Same as 4, 5, and 6 on
the left.
M-12