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The sheet does not move past the buffer path paper sensor when an equivalent of twice the

feeding length of the sheet has been fed after the sensor turned on.

Jam check

Equivalent of size x 2

Buffer path paper 
sensor (PI14)

Normal

First feed motor (M1)

Jam check

Equivalent of size x 2

Buffer path paper 
sensor (PI14)

Jam

First feed motor (M1)

a.

Straight Path

The delivery sensor does not detect paper when an equivalent of 363 mm has been fed after the

inlet sensor turned on.

Jam check

Inlet sensor (PI1)

Normal

Delivery sensor (PI3)

First feed motor (M1)

Second feed motor 
(M8)

Jam check

Inlet sensor (PI1)

Delivery sensor (PI3)

First feed motor (M1)

Second feed motor 
(M8)

Jam

Equivalent of 363 mm

Equivalent of 363 mm

b.

Buffer Path

The delivery sensor does not detect paper when an equivalent of 652 mm has been fed after the

inlet sensor turned on.

Jam check

Inlet sensor (PI1)

Normal

Delivery sensor (PI3)

First feed motor (M1)

Second feed motor 
(M8)

Jam check

Inlet sensor (PI1)

Delivery sensor (PI3)

First feed motor (M1)

Second feed motor 
(M8)

Jam

Equivalent of 652 mm

Equivalent of 652 mm

The sheet does not move past the delivery sensor when an equivalent of twice the feeding

length of the sheet has been fed after the delivery sensor turned on.

Jam check

Equivalent of size x 2

Equivalent of size x 2

Delivery sensor (PI3)

Normal

Second feed motor 
(M8)

Delivery motor (M2)

Jam check

Delivery sensor (PI3)

Second feed motor 
(M8)

Delivery motor (M2)

Jam

The sheet does not move past the stapling tray sensor 1 sec after the delivery motor (M2) turned

on.

Jam check

1 sec

1 sec

Stapling tray 
sensor (PI4)

Normal

Delivery motor (M2)

Jam check

Stapling tray 
sensor (PI4)

Delivery motor (M2)

Jam

When the staple motor (M6) is rotating clockwise, the staple home position sensor (PI22) does

not turn on within 0.5 sec. after it has turned off. However, the sensor turns on within 0.5 sec. after
the motor has been rotated counterclockwise.

One of the inlet sensor (PI1), delivery sensor (PI3), buffer path paper sensor (PI4) or buffer path

inlet paper sensor (PI17) detects paper at power-on.

One of the joint sensor (PI15), door open sensor (PI16) or door switches (MS1) detects the

cover open during operation (including front door switch (MS2P) when the optional puncher unit is
mounted).

The punch home sensor (PI3P) does not turn on again within 200 msec after turning off.

The finisher controller PCB is supplied with 24 VDC power when the host machine is turned

on. Power is also supplied from the finisher controller PCB to the saddle stitch controller PCB. In
addition, power is also supplied to the punch driver PCB when the optional puncher unit is mounted.

Some of the 24 VDC power used to drive motors is cut off when the door switch (MS1) is open.

The power to the saddle stitch controller PCB, however, will not be cut off.

Figure 2-301 is a block diagram showing the power supply system.

Power source

The 24 VDC power line used to drive motors and solenoids is equipped with a circuit breaker

(CB1) for protection against overcurrent. The 24 V line used to drive the first feed motor (M1),
alignment motor (M3), and stapler shift motor (M4) are equipped with a fuse, which is designed to
blow when an overcurrent occurs.