Canon LBP3010 Series, Service Manual, Page: 72 / 146

Chapter 2
2-40
CPU of engine controller determines the fixing assembly error and shuts the fixing heater drive signal (FSRD) and also turns OFF relays to shut the power supply
to the fixing heater in the following cases. Also, it notifies the error status to the main controller simultaneously.
1) Startup error detection
- When thermistor temperature does not reach 35 deg C within 1.5 sec from heater ON.
- When the thermistor detects the temperature of 100 deg C or below during stand-by.
2) Abnormal low temperature error
- After heater ON, when the thermistor detects the temperature of 100 deg C or below at printing after the thermistor temperature reaches 50 deg C.
- After heater ON, when the thermistor detects the temperature of 55 deg C or below at sheet interval or in cleaning mode after thermistor temperature reaches
50 deg C.
3) Overheat error
When the thermistor detects the temperature of 220 deg C or over 30 times consecutively.
4) Frequency detection circuit error (200-240V series only)
When it cannot detect the frequency detection signal at fixing drive circuit even once within 3.3 sec after power ON.
2.8.3 Other Functions
2.8.3.1 Throughput Down Control
0019-7681
LBP3100 / LBP3010B
This machine performs the throughput down control that extends the paper interval and lower the printing speed to prevent the edge of the fixing heater from over-
heating at continuous printing of small paper (the paper with narrow width) and to prevent the fixing heater unit from overheating at high-volume continuous print-
ing.
This control extends the interval between heater on and prevents the edge of the roller of fixing assembly and the delivery unit from overheating.
This control has the following 3 modes and the operation sequence differs depending on each modes.
Mode 1: sequence (For prevention of temperature increase in the edge)
Condition: paper length is 264mm or shorter
Operation: print speed drops according to the setting item (paper type) on the printer driver. Simultaneously, control the target temperature of the fixing assembly
according to the temperature in the following table.
F-2-49
T-2-11
Mode 2: sequence (For prevention of temperature increase in the edge)
Condition: paper length is 264mm or longer while paper width is 190mm or shorter
Operation: print speed drops to 3ppm from the 2nd sheet of continuous print. Simultaneously, control the target temperature of the fixing assembly within the
range of approx. 155 deg C to 170 deg C.
Mode 3: sequence (For prevention of temperature increase in the delivery unit)
Condition: paper width is 190mm or longer
Operation: print speed drops to 5ppm from the 251st sheet of continuous. Simultaneously, control the target temperature of the fixing assembly within the range
of approx. 132 deg C to 134 deg C.
2.8.3.2 Throughput Down Control
0025-1181
LBP6000 / LBP6000B
No. Paper type
[1] Plain paper/plain paper L
[2] Heavy paper/heavy paper L
[3] Postcard
[4] Postcard H
The number of sheets of
continuous print (sheets)
Print
11
10
9
8
7
6
5
4
3
2
1
0
5 10 15 20 25 30 35 40
11 16
31
41
[1]
[2]
[3]
[4]