Canon GP200 Service Manual page 109

Laser output characteristics
Photo output
I
b
I
b
2. Switching the Laser Output
The laser output may be either high, medium, or low, ensuring the best image for the selected mode.
The output is switched by the output signal "intensity selection signal 0, 1, 2" from the image processor
PCB.
Each of these laser outputs is used for its respective mode as shown:
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at temperature T1
(T )
1
(T )
2
Drive current
Laser output
High
Medium
Low
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
Laser output characteristics
at temperature T2
current
I (T ) : Bias current for temperature T1
b 1
I (T ) : Bias current for temperature T2
b 2
Figure 3-404
Mode
Text mode, text/photo mode
Photo mode, FAX output
Printer output
3. OPERATIONS AND TIMING
Laser output
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