Down Sequence Control - Canon imageRUNNER ADVANCE 4551i Service Manual

• Setting of control temperature(Plain paper2,Cassette)
COPIER > OPTION > IMG-FIX > TMP-TBL7
• Setting of control temperature(OHP)
COPIER > OPTION > IMG-FIX > TMP-TBL8
• Setting of control temperature(Plain paper1,Cassette)
COPIER > OPTION > IMG-FIX > TMP-TBL9

Down sequence control

■ Down sequence when feeding small size paper
Purpose
To prevent temperature rise of non-feeding area in the case of continuous print of small size paper (less than A4 of length in width
direction), fixing offset or deterioration of fixing film.
Starting conditions
1. Normal down sequence
(1) When the detected temperature of sub thermistor (front) or (rear) reaches 255 deg C or higher for 400 msec continuously
during printing
(2) Whenever the thermistor detects 255 deg C or higher for 400 msec continuously, the down sequence is carried out with
the maximum 4 steps.
2. Heavy paper down sequence
(3) When one minute have passed with the heavy paper mode 1/2/3/4, or when the detected temperature of sub thermistor
(front) or (rear) reaches 255 deg C or higher for 400 msec continuously
(4) When the detected temperature of sub thermistor (front) or (rear) reaches 255 deg C or higher for 400 msec continuously
with the heavy paper down sequence, the productivity is compared with the normal down sequence. If the productivity of the
normal down sequence is low, the sequence is shift to the normal down sequence.
Operation
The fixing temperature is reduced by making wider sheet-to-sheet distance to control the temperature at lower than the target
temperature for normal print.
(Unit: sheets)
Down sequence A4
LTR
Normal down1 12
Normal down2 10
Normal down3 8
Normal down4 8
Heavy paper down 16
Completion conditions
(5) When the fixing temperature reaches 175 deg C and lower for 400 msec continuously, the productivity returns to normal.
(6) When the fixing temperature reaches 175 deg C and lower for 400 msec continuously after shifting from the heavy paper
down sequence to the normal down sequence, the sequence is shifted to the heavy paper down sequence.
B4 B5 A4R
LGL A5 LTRR
20 20
12 12
10 10
8 8
8 16
109
A5R Post card
B5R
EXE-R
20 18
12 14
10 14
8 14
10 16
2. Technology
S-Post card Free size
Envelope
14 10
10 8
10 8
10 8
10 8
12
10
8
8
8