Ricoh G133 Service Manual page 738

Fusing
T1 = T2
T1: Actual target temperature
T2: Heating roller target temperature for the ready condition (adjustable with
SP1-105-001, default: 138°C)
The machine determines that the temperature of the fusing unit is at the target temperature
for the ready condition when all the conditions below occur.
The thermopile detects the specified temperature.
Specified temperature = T2 - T4
T2: Heating roller target temperature for the ready condition (adjustable with
SP1-105-001, default: 138°C)
T4: Offset temperature for the ready condition (adjustable with SP1-105-002, default:
0°C)
The thermistor of the heating roller detects the specified temperature.
T5 ≤ Specified temperature ≤ T6
T5 = T2 (default: 138°C) - 70°C (adjustable with SP1-105-003)
T6 = 200°C (adjustable with SP1-105-004)
The thermistor of the pressure roller detects the specified temperature.
T7 ≤ Specified temperature ≤ T8
T7 = T2 (default: 138°C) - 90°C (adjustable with SP1-105-005)
T8 = 180°C (adjustable with SP1-105-006)
Extra idling mode [2]:
The machine uses the extra idling when some conditions occur.
If the ambient temperature ≤ 17°C (adjustable with SP1-112-001)
In this condition, the temperature of the heating roller is kept at 165°C (adjustable with
SP1-105-106) for 60 seconds (adjustable with SP1-103-016).
If the ambient temperature ≥ 30°C (adjustable with SP1-112-002)
In this condition, the temperature of the heating roller is kept at 160°C (adjustable with
SP1-105-108) for 25 seconds (adjustable with SP1-103-017).
If 17°C ≤ Ambient temperature ≤ 30°C
In this condition, the temperature of the heating roller is kept at 160°C (adjustable with
SP1-105-107) for 25 seconds (adjustable with SP1-103-018).
Maintain mode for the ready condition temperature [3]:
The temperature of the heating roller is kept at 160°C (adjustable with SP1-105-082) for 60
seconds (adjustable with SP1-113-001) after the temperature of the fusing unit reaches the
temperature for the ready condition.
Stand-by mode [4]:
G133 6-66 SM