If the distance between sheets for fixing is greater than indicated*, the machine executes sheet-to-sheet temperature control using a temperature lower than that used

for printing temperature control. It also uses this mechanism if no paper arrives for a specific period of time after start-up. The target temperature used for sheet-to-

sheet printing control is -30 to -50 C deg of the temperature used for printing temperature control.

* When the following is true:

- small paper size down sequence

- between 1st side and 2nd side of a double-sided print

- when a command arrives (ATR control, registration control, ATVC control)

D. Temperature Control when Resizing the Paper Size during Down-Sequence Control

The down sequence control is continued as it is when changing to a small size when the down sequence is being controlled. The power supply to the heater and

driving the fixing system are stopped once when changing to the size of the form of A4R or more. It shifts to a usual start-up control after the sub-thermistor detects

under 150 deg C or 30 seconds pass, and the size after it changes is printed.

Service Mode:

COPIER > OPTION > BODY > P-CGH-TM

Default: 0

Resets the temperature at which job is restarted and the amount of time required before the restart when the paper size is changed to larger sizes (A4R or wider)

during down-sequence control.

Entry

Temperature at Return

Time Before Return

Enter a greater entry if reducing the downtime during paper size switchover is desired. Enter a smaller entry to prevent hot offset immediately after the switchover.

9.2.1.4 Fixing film edge cooling control

/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880

In the case of continuous prints of the size paper (the width less than A3NC, and as large as A4NC or more), if the sub thermistor detection temperature of the fixing

film reaches to the specified temperature, it executes temperature control to prevent the edge temperature rise by feeding air from the 2 cooling fans to the fixing

film edge. Thanks to this, it prevents film deterioration by heating of the fixing film edge.

1. Shutter Fan Position Drive Control

The duct that passes air has a shutter mechanism to enable sending air to the ideal area of the fixing film by opening/closing the shutter by 6 steps (from full-close

to full-open) according to the paper size. The shutter opening/closing position that corresponds the paper size has 7-point (A4R, LTRR, B4, EXE, K8, LTR, home

position).

Open/close positions of the shutter is detected by the fan shutter HP sensor (PS28) and fan shutter position sensor (PS29). When sub-thermistor 1 (TH2) detects

temperature listed below, fan shutter motor (M15) is rotated until the fan shutter HP sensor detects the shutter. And then, positive rotation of the fan shutter motor

(M15) is initiated and the shutter is moved to a position corresponds to the paper size chosen. The fan shutter motor is reversely rotated in the last-rotation period,

and the shutter is returned to the home position. If paper size is changed during continuous printing, the shutter is returned to its home position first and then the

shutter is moved to a position corresponds to the paper size chosen.

9-4

Paper type

plain paper (64 to 105 g/m2)

thin paper (less than 64 g/m2)

special fixing mode 2 *3

plain paper (64 to 105 g/m2)

thin paper (less than 64 g/m2)

rough paper *1

rough paper (strong) *2

special fixing mode 2 *3

OHT