Konica Minolta bizhub C658 Service Manual page 1879

bizhub C658/C558/C458/C368/C308/C258
[4]
[1] Front of machine
[3] Fusing heater lamp2 (FH2)
[5] Heating roller thermostat (TS1)
[7] Heating roller thermistor2 (TH2)
• *: Equipped to bizhub C368/C308/C258 only
(2) Temperature control chart
* An example when a machine is warmed up under a normal ambient condition
[1] [3]
[2] [4] [5]
[13]
0
[1] Main power switch ON
[3] Warm-up completed
[5] Standby control (including a countermeasure against
overshoot)
[7] Print control
[9] Low power mode
[11] Sleep mode
[13] Temperature
(3) Fusing temperature control during warm-up
• To prevent image fixability from being degraded due to environmental changes when the main power switch is turned ON, three different
warm-up modes are incorporated for fusing temperature control.
• The warm-up mode is performed "at low temperatures", "at ordinary temperatures", or "under high humidity condition".
• In the warm-up mode under high humidity condition, the warm-up time is extended to prevent paper from curling and the difference in
temperature between the fusing belt and fusing pressure roller is minimized.
• When the temperature of the fusing belt reaches the warm-up completion temperature, control is passed onto the pre-standby process.
Warm up mode
Warm-up at low temperatures
Warm-up at ordinary temperatures
Warm-up under high humidity condition
• *1: Absolute humidity: water content contained in the air (1 m3) as steam regardless of the temperature
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 13.
[5]
[6] [7]
[3] [2]
[6]
[7] [8]
Machine interior temperature
18 °C or less
More than 18 °C to 32 °C or less
More than 32 °C
FUSING SECTION (bizhub C458/C368/C308/C258)
[8]
[1]
[2] Fusing heater lamp1 (FH1)
[4] Rear of machine
[6] Heating roller temperature sensor (TEMS) *
[8] Heating roller thermistor1 (TH1)
[10]
[9]
[11]
[12]
[14]
[2] Warm-up control
[4] Pre-standby control
[6] Print request
[8] Standby
[10] Entry in sleep mode
[12] Fusing belt temperature
[14] Time
Environment
Not judged by absolute humidity
Less than a predetermined value
Predetermined value or more
O-104
Machine interior humidity (absolute humidity
*1)