Canon NP-1010 Service Manual page 76

15)Push the upper roller against the lower
. Check that the detection face of the ther-
roller, and pull it out of the bushing (rear)
moswitch is in uniform contact with the
slowly.
surface of the upper roller.
@ Upper roller @ Lower roller
Figure 4-69
16) Remove the lower roller.
5. Mounting the Lower Roller, Upper
Roller, and Heater
Mount the lower roller, upper roller, and
heater according to the foregoing procedures
but in reverse. Note the following:
Do not touch the surface of the heater.
Mount the heater with its ratings print to
the rear.
Wrap the upper roller in copy paper to
protect it against dirt or scratches.
Make sure that the detection face of the
thermistor is in uniform contact with the
surface of the upper roller.
Thermistor spring
I
Figure 4-70
If the contact is not uniform, check
thermistor spring for deformation.
Canductmg plate (leaf spring1
i
Figure 4-71
If the contact is not uniform, check the
conducting plate of the thermoswitch for de-
formation
. The copier does not allow adjustment of
the nip; the nip width is correct if within
the values shown in Table 4-l.
Figure 4-72
Distance
Measured when upper and lower
rollers are adequately heated.
b 2.8 - 4.0 mm
a-b
I I
c-b
0.9 mm or less
the
Table 4-l
Measuring the Nip Width
Open the copyboard cover, and make a
solid black copy in A4.
Turn the power OFF as soon as the leading
edge of the copy paper is about to come
on the copy tray, and open the top unit.
Pull out the copy paper from the fixing as-
sembly 2.0 to 30 set thereafter,
Measure the width of the section over
which the toner is shiny.
COPrRlonT 019ne CAnoH Inc.
CMJH HP-1010 RN.0 OEC. 1988 PRIHTEU IA JAPAN llMPfUME AU JAPOA)
4-23