Canon NP6251 Service Manual page 48

CHAPTER 2 BASIC OPERATION
Period
WMUP
(warm up)
INTR
(initial total
rotation)
WAIT
(wait)
CNTR1
(control
rotation 1)
CNTR2
(control
rotation 2)
LSTR
(last rotation)
STBY (standby)
2-6
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From when the
power switch is
turned on to when
the surface
temperature of the
upper fixing roller
reaches 195°C.
From when WMUP
ends until when
CNTR1 starts after
the surface
temperature of the
upper fixing roller
has reached 195°C.
For about 5 sec
after the end of
INTR.
For about 5 sec
after the end of
CNTR1.
While the
photosensitive drum
makes a single
rotation.
From when LSTR
ends to when the
Copy Start key is
pressed or the
power switch is
turned off.
Table 2-101
CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Function
• Waits until the
fixing assembly
warms up.
• Evens out the sur-
face temperature
of the fixing roller.
• Discharges copy
paper, if any.
Measures the drum
surface potential
VD.
Measures the drum
surface potential
VL.
Rids the surface of
static charges as
post-treatment.
• Waits for a press
on the Copy Start
key or an
operation key.
Remarks
• If the temperature
of the fixing roller
is 100°C or less at
power-on, the pri-
mary/pre-trans-
fer/separation/
transfer charging
wire is cleaned.
• The lens moves to
A4 wide (297 mm)
Direct position.
Determines the
value of the devel-
oping bias (DC
component) for
copying according
to the measurement
of VL2.
• In 2 min after the
end of LSTR, the
control panel
changes to
standard mode
indication.
• If the Copy Start
key is pressed
(auto start) during
a wait period,
copying starts at
the end of LSTR.