Apple Color LaserWriter 12/600 PS ation User Manual download pdf (Page 41)

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Color LaserWriter 12/600 PS Basics & Theory 1–30

Basic Sequence of Operation

Outline The following table describes the ﬁve periods of printer operation. .

Period & Duration Purpose Remarks

WAIT (Wait)

From power-on until the

fuser roller tempera-

ture reaches the target

value. This period ﬁn-

ishes in about three

minutes at normal room

temperature.

To warm up the fuser

roller to put the

printer in the standby

state.

During this period, the

printer checks for

jammed paper and for

availability of all the

toner cartridges. It

also performs image

stabilization and other

tasks.

STBY (Standby)

From the end of the

WAIT period until the

/PRINT signal is input

from the I/O controller.

From the end of the

LSTR period until the

/PRNT signal is input

from the I/O controller

or the power switch is

turned off.

To hold the fuser

roller at the target

value to keep the

printer ready to print.

If the printer stays in

the standby state for

30 minutes or more, it

drives the main motor

for 0.5 second to

rotate the fuser roller,

so that the fuser roller

will not be deformed.

INTR (Initial Rotations)

After the /PRNT signal

has been input from the

I/O controller until the

transfer drum rotates

up to the top position

for the ﬁrst color.

To stabilize the

sensitivity of the

photosensitive drum

in preparation for

printing.

When the scanner

motor reaches the

target speed, the DC

controller sends the

print sequence

command to the

mechanical controller.

PRINT (Print)

From the end of the

INTR period and the

subsequent completion

of transfer until the

transfer drum rotates

up to the registration

position.

To form an image on

the photosensitive

drum according to

the /VDO signal input

from the I/O

controller and to

transfer the image to

the paper.

LSTR (Last Rotations)

From the end of the

PRINT period until the

main motor stops.

To deliver the last

print and to

discharge the

transfer drum.

Cleaning of the

transfer drum occurs

after every 100 prints.

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 375 376

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Apple Color LaserWriter 12/600 PS ation User Manual Page 41

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