Image Fusing - Ricoh A219 Service Manual

IMAGE FUSING

7. IMAGE FUSING
1. Both the hot roller and pressure roller for the A245 are different from the
A219. To distinguish between the two types of roller, check the end of the
roller shaft as described below.
HOT ROLLER
PRESSURE ROLLER
2. Due to the increase in copier CPM, the thickness of the metal core of the
hot roller has been increased for the A245 copier. This causes the ready
temperature to be higher, and the temperatures are as follows:
172°C: 120 V machines
177°C: 230 V machines
Also, to achieve the same warm-up time as for the A219 copier in the 230 V
machines, the fusing lamp wattage has been increased from 650 W to 760 W.
For the 120 V machine, the warm-up time specification is slightly longer than
for the A219, so the lamp is not changed.
3. FUSING IDLING (SP116)
Fusing idling can be selected with SP116. This mode should be used
when the copier has fusing problems with copies which are made soon
after warm up. This problem is most likely to occur in low temperature
locations where the wall outlet condition is also not stable. Please note
that when this mode is selected, copier warm-up will take a couple of
seconds extra, and the first copy time will not be within specification.
When the start key is pressed, fusing idling is performed for 2 seconds. If
the temperature of the fusing unit is below the operating temperature by
up to 10°C, copying starts. If the detected temperature is more than 10°C
lower than the operating temperature, fusing idling will continue until the
detected temperature reaches 180°C. This will take 6 ~ 7 seconds longer
to warm up than if fusing idling is not used.
A245
CÓPIA NÃO CONTROLADA
- A219 -
A245D505.wmf
- A219 -
A245D506.wmf
A245 copier
11-14
CÓPIA NÃO CONTROLADA
- A245 -
- A245 -
A219 copier
165°C: 120 V machines
172°C: 230 V machines
A245D504.wmf
A245D507.wmf
SM