7-39
COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
5
Adjusting the Laser Intensity
Be sure to adjust the laser power be-
fore making the following adjust-
ments:
1) Start service mode, and execute ‘BIAS’ of ‘#6
LASER’ under ‘FUNC’.
2) Take notes of the reading of the Digital
Multimeter.
3) Press the Stop key to stop the laser output.
4) Compute the target value according to the fol-
lowing formula:
12) Press the Reset key to end service mode.
13) Turn off the power switch.
14) Remove the laser power checker, and install
the inlet cover.
Table 7-202
5) Execute ‘400-P00’ of ‘#6 LASER ‘ under
‘FUNC’.
6) Turn VR3 counterclockwise so that the reading
of the Digital Multimeter is the P00 target value.
7) Press the Stop key to stop the laser output.
8) Execute ‘400-PFF’ of ‘#6 LASER’ under
‘FUNC’.
9) Turn VR4 counterclockwise so that the reading
of the Digital Multimeter is the PFF target
value.
10) Press the Stop key to stop the laser output.
11) Adjust the volumes according to the type of la-
ser unit as follows:
For Y, adjust VR7 and VR8 using ‘266-P00’
and then ‘266-PFF’.
For M/C, adjust VR5 and VR6 using ‘200-P00’
and then ‘200-PFF’.
For Bk, adjust VR5 through VR8 using ‘200-
P00’, ‘200-PFF’, ‘266-P00’, and then ‘266-
PFF’.
Table 7-203
Item
400_P00
400_PFF
200_P00
200_PFF
266_P00
266_PFF
VR
VR3
VR4
VR5
VR6
VR7
VR8
Formula
P00 target:
(POWER–BIAS)
×
0.008+BIAS=
PFF target:
(POWER–BIAS)
×
0.9+BIAS=
Results
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