Table 3-4 Explanation Of ~Jam~ Flowchart - Canon NP-70 Service Manual

NP -70
3-29
Block Actions Occurring
In this step, the copy paper has remained in the exit area of the copier for a long
enough time to allow C20 to charge completely. The result is the turning on of
Q27, Q28,
and Q39 to provide an alternate path for the energization of solenoid
SL7.
As the solenoid turns ON, it releases microswitches MS6A & MS6B to result in the
stopping of copier operations, as shown.
STEP 6JE
As the copy paper failed to begin exiting at its normal time (see
STEP SJD ),
STEP 6JD
the copier is turned off with the actuation of MS2A (about 20° of drum revolu-
tion later).
Solenoid SL7 energizes due to the fact that Q29, K11 and MS2A are all, simul-
taneously,
ON.
As in the case of "Exit" jam, microswitches MS6A & MS6B are released to deacti-
vate the copier to prevent drum rotation and heater operation which would result
in damage to the copier.
As the copier is now in a partially deactivated condition, it is necessary to remove
the jam and reset solenoid SL7, before beginning operation again.
REMOVE
JAM
Table 3-4
Explanation of
JAM ~ Flowchart
© CANON INC.
Second Printing-June, 1974