Minolta Di551 Service Manual page 119

FIXING UNIT
*1 Fixing heater lamps
Two halogen lamps are used for the fixing upper
roller and one halogen lamp is used for the fixing
lower roller to reduce the warm-up time and
ensure reliable fixing.
*2 Cleaning
Cleaning web is used to clean the fixing upper
roller. The web SD (SD2) in the main body turns
ON/OFF to drive the cleaning web wind-up shaft
via the ratchet mechanism and gears, thus sup-
plying cleaning web from the cleaning web
unwinding shaft. SD2 is controlled according to
the copy count, and cleaning web supplied about
0.025 to 0.05 mm/copy. Cleaning web containing
silicon oil is pressed against the fixing roller
(upper) by the pressure roller.
1
2
5
1. Pressure roller
2. Cleaning web unwinding shaft
3. Web SD (SD2)
4. Ratchet
5. Cleaning web wind-up shaft
3
4
2-O-2
*3 Decurler
The paper guided by the reverse/exit selection
gate is decurled while it passes between the
decurler roller and restriction shafts. The
decurler roller is driven by the fixing roller (upper)
via gears.
Fixing roller (upper)
Restriction shafts
Decurler roller
*4 Jam detection
When a jam occurs in the fixing exit section, the
paper exit guide plate (lower) is pressed down,
causing the fixing exit PS (PS30) to detect a jam
via the jam detection plate and actuator.
1
4
1. Actuator
2. Exit guide plate (lower)
3. Fixing exit PS (PS30)
4. Jam detection plate
2
3