Fixing Temperature System; Fixing Temperature Control Based On Ambient Temperature - Kyocera KM-1620 Service Manual

2C9

(1) Fixing temperature system

Temperature
(°C)
Warm-up
control
500 ms
HEAT signal
HEAT signal
• Warm-up control
1. 500 ms after the fixing heater S (FH-S) turns on, the fixing heater M (FH-M) turns on.
2. When the fixing temperature reaches preset temperature, both fixing heater S (FH-S) and fixing heater M (FH-M) turn off
simultaneously.
• Ready state control
1. When the fixing temperature drops to the preset temperature, fixing heater S (FH-S) turns on, and after specified time, the
heater turns off.
2. When fixing heater S (FH-S) turns off, fixing heater M (FH-M) turns on at the same time, and after specified time, the heater
turns off.
3. The operation above is repeated to keep the fixing temperature to the preset temperature.
* If a temperature more than or equal to the preset temperature + 20°C/68°F is detected, both fixing heater S (FH-S) and
fixing heater M (FH-M) are turned off forcibly.

(2) Fixing temperature control based on ambient temperature

This machine performs fixing temperature control based on the ambient temperature.
Ambient temperature
Lower than 15°C/59°F
Higher than or equal to 15°C/59°F,
lower than 20°C/68°F
Higher than or equal to 20°C/68°F,
lower than 31°C/78.8°F
Higher than 31°C/78.8°F
2-1-16
Ready state
control
Off
On
Off
On
Figure 2-1-19 Fixing temperature system
Fixing temperature (°C)
Reference value +10
Reference value +5
Reference value
Reference value -5
Off
On
Off
On
Preset temperature (°C)
(secondary stabilization)
Time
Fixing heater S (FH-S)
On
Fixing heater M (FH-M)
On