Canon CLC5100 Series, Manual

Page: 68 / 290

Chapter 2
2-16
F-2-30
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4) Set the laser power checker switch to '2'.
5) Insert the laser power checker with its light
receiving face oriented as indicated in the figure
below.
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F-2-31
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6) Insert the lead wire of the laser power checker into
the Digital Multimeter, and set it to the 200 mV
range.
7) Start service mode, and execute 'POWER' and '1/2
POWER' of '6 LASER' under'FUNC'.
8) The nominal laser power adjustment values are:
'POWER: 85.0±0.8mV, 1/2 POWER: 45.0±0.4mV'.
After replacing the laser unit in the field, the allowable
ranges for the adjusted values must be extended to
tolerate the variations below:
1) ±3.4% for adjustment variations at the factory
2) ±7.4% for variations resulting from the ambient
temperature fluctuations at the time of adjustment and
variations among individual power checkers used in
the field.
Accordingly, after replacing the laser unit in the field,
verify that the adjusted laser power is within the
ranges below.
'POWER: 85.0±9.39mV, 1/2 POWER: 45.0±4.97mV'
If laser power is within the ranges, no further
adjustment is necessary.
If laser power is out of the range, follow the procedure
below to adjust and contain it within the ranges.
If the value is different, make adjustments described
below to set the indicated value.
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Making Adjustments
1) Turn the volumes VR1 through VR8 on the laser
unit fully clockwise.
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F-2-32
Y/Bk Laser Unit
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VR1:1/2 POWER
VR2:POWER
VR3:800P00
VR4:800PFF
VR5:400P00
VR6:400PFF
VR7:200P00
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266P00
VR8:200PFF
ޓޓ
266PFF
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Bk laser unit C laser unit
M laser unit
Y laser unit
Y laser power
checker inlet
cover
M laser power
checker inlet
cover
C laser power
checker inlet
cover
Bk laser power
checker inlet cover
Analog
processor
PCB
Bk laser unit C laser unit
M laser unit
Y laser unit
Laser power checker
Light-
receiving
face
Light-
receiving
face
Light-
receiving
face
Light-
receiving
face
VR1
VR2
VR3
VR4
VR5
VR6
VR7
VR8