Canon GP405 Service Manual page 621
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Copier-Related Machine Settings
Level 3
AGS-NON
Enable or disable automatic selection of a density
correction curve based on the result of photosensitive drum
resistance measurement.
The resistance represents the reading of
FUNCTION>DPC>D-GAMMA when this item is set to '0'.
If adjustment is not possible using the Basic Image
Adjustment Procedure (i.e., the result is far from the
reference value), select '1'. Such a condition, however,
indicates that the image processor PCB, DC controller
PCB, composite power supply PCB, or scanner unit is
faulty.
MODEL-SZ
Switches between B and Inch configuration, and the result
will affect the following:
• Enlargement/reduction pattern
• Feeder size detection
However, if '1' is set (FEEDER>OPTION>SIZE-SW), AB/
Inch detection will be made. To change original detection
for copyboard cover mode, the size sensors must be
rearranged and the DIP SW701 on the image processor
PCB must be set accordingly. (VI-H in Chapter 14)
HUM-SW
Enables/disables the environment sensor.
The machine automatically controls the transfer separation
current according to the reading of the environmental
sensor. However, this item may be set as needed to suit the
site:
• To prevent control faults caused by a fault environment
• To enable use in a special environment.
• Measurement are taken every 2 hr, and control is based
TRNS-SW
Sets the transfer bias output control method for large-size
copy paper.
Use it to correct image faults on large-size paper owing to
transfer. If '1' is set in this mode, the transfer bias control
method will be a constant voltage control method for both
small- and large-size papers, and TR-N1 and TR-N2
settings will affect transfer output for both small-size and
large-size papers.
THINP-SP
Enables or disables separation enhancement mode.
Select '1' to ensure separation of paper with low separation
characteristics (thin paper) by increasing the bias used for
separation discharge.
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Operation
Uses
Uses
sensor.
on the average of the most recent five measurements.
CHAPTER 14 TROUBLESHOOTING
0*:The density
correction curve
will automatically
be corrected based
on the result of
measurement.
1: The density
correction curve
will be maintained
as it is (no
change).
0*:AB
1: Inch
2: A
3: Ab/Inch
0*:control by the
environment
sensor.
1: fixed mode (for
high humidity)
2: fixed mode (for
normal humidity)
3: fixed mode (for
low humidity)
(1, 2, and 3 will
not use control by
the environment
sensor.)
0*:auto mode
1: manual mode
If you have
selected manual
mode, make sub
settings under
ADJUST>HV-
TR>TR-N1, N2.
0*:OFF (-2.3 KV)
1: ON (- 3.0 KV)
OPTION
Remarks
14-203
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