Ricoh A230, Service Manual, Page: 131 / 1134

IMAGE FUSING AND PAPER EXIT
2-68
A230/A231/A232 SM
2.10.6 FUSING TEMPERATURE CONTROL
Temperature Control
There are two types of control: on/off control, and phase control. The mode can be
selected with SP1-104.
When the main power switch turns on, the CPU checks the ac frequency for 500
ms; this is done in case phase control mode is selected later. Then the CPU turns
on the fusing lamp. When the thermistor detects the stand-by temperature (155
°
C
for A231/A230, 175
°
C for A232), the machine can start to print. When the
thermistor detects the operating temperature (165
°
C for A231/A230, 185
°
C for
A232), the CPU turns the fusing lamp off/on to maintain this temperature.
Fusing Idling
If copies are not sufficiently fused soon after the main power switch is turned on,
fusing idling should be enabled with SP1-103. When fusing idling is enabled, it is
done when the temperature reaches the value of SP1-105-1 (Fusing temperature
adjustment) - 20
°
C
However, even if fusing idling is enabled, it is not done when the temperature at
power-up > the value of SP1-105-1 -20
°
C
In the opposite case, even if fusing idling is disabled, it is done when the
temperature at power-up
≤
15
°
C
The fusing idling time is as follows.
Fusing idling mode The temperature at
power-up
Disabled Enabled
15
°
C or less
30 s 2 min *
Higher than 15
°
C
Not performed 30 s
* In this case, fusing idling also prevents dirty background.
35 cpm (A230/A231)
45 cpm (A232
)
A
2
30
/A
23
1
A2
3
2
A231D518 WMF