Ricoh A-C4, Руководство по обслуживанию

Страница: 480 / 497

20 June 2005 IMAGE FUSING AND PAPER EXIT
6-99
Detailed
Descriptions
Temperature Control
There are two types of temperature control:
•
On/off control (Default)
•
Phase control.
Either mode can be selected with SP1104 (Fusing Temperature Control).
After the machine is powered on, the CPU checks the ac frequency for 500 ms, in
case phase control is selected later for the temperature control, and then switches
on the fusing lamp.
As soon as both the center and end thermistors detect the print ready temperature
(also known as the “re-load” temperature), the machine can operate. The “reload”
temperature is 3
°
C below the fusing temperature (this depends on the settings of
SP1105 1~4, 7, 8). As soon as the thermistors detect the fusing temperature, the
CPU switches the lamps off but frequently switches on/off again in order to
maintain the fusing temperature.
The default temperatures of SP1105 for these models are set 10 ~ 30 degrees
lower than the temperatures for the previous machines. Some new SP codes have
been added and others removed. For details, see Section “5. Service Tables”.
Center
End
Cen
ter
En
d
165°C
160°C
Main SW ON Re-load
50
200
135
100
°C
130
Fusing Temp.
B079 (35 cpm)
Center
End
Cen
ter
En
d
175°C
170°C
Main SW ON Re-load
50
200
140
100
°C
145
Fusing Temp.
B082 (45 cpm)
B195D929.WMF