Canon LBP-2000 Service Manual download pdf (Page 41)

CHAPTER 2

2 - 2

B. Sequence of Basic Operation

The sequence of the printer operation is controlled by the microprocessor found on the DC control-

ler PCB. The conditions and the purposes of the sequence of each interval at power-on and during

printing are as follows:

• At Power-On

Table 2-1-1

Purpose Remarks

wait

WMUP

(warm-up)

WMUPR

(warm-up

rotation)

STBY

(standby)

After the power switch is

turned on, the Printer

moves to standby state

for the following conditions

to reduce wait time:

• 25 sec or more passes

and, in addition, the

temperature of the fixing

assembly is 150˚C or

higher.

• 27 sec or more passes

and, in addition, the

temperature of the fixing

assembly is 145˚C or

higher.

From when the power switch is turned

on to when the surface temperature

of the fixing roller reaches 140˚C.

From when warm-up ends to

when the main motor is turned on

and then off.

From when the warm-up interval ends

to when the /PRNT signal arrives

from the video controller. Or, from

when LSTR ends to when the /PRNT

signal arrives from the video

controller or the power switch is

turned off.

Interval

To heat the fixing roller and to

put the Printer to warm-up

rotation state.

To make the surface temperature

of the fixing roller even. Also, to rid

the drum surface of potential and

to clean the transfer charging roller.

To control the fixing roller to

standby state, thereby keeping

the Printer ready for printing.

The level of remaining

toner is detected during

this interval.

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Canon LBP-2000 Service Manual Page 41

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