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ADJUSTMENT
*31 Image density selection (toner density selection
of developer)
These bits set the toner density of developer by
changing toner supply threshold and developing
sleeve rotation speed with image density
unchanged.
Decrease toner density when the image is gray
background or toner is scattered. Increase toner
density when the image is unevenly transferred
or white spots occur.
Mode
Standard toner density
Approx. 0.75% up
Approx. 0.75% down
Approx. 1.5% down
Note: There are three DIP switches to change
the image density : 5-0/1 (toner concen-
tration threshold), 5-2/3 (lase PWM), and
23-2/3 (toner density of developer). The
priority of order of these adjustment are
as follows:
(1) Laser PWM
(2) Toner density of developer
(3) Toner concentration threshold
*32 Maximum number of sheets with z-folding
(main tray)
Mode
Up to 50 sheets
Up to 40 sheets
Up to 30 sheets
Up to 20 sheets
*33 Maximum number of sheets with z-folding + sta-
pling
Mode
Up to 5 sheets
Up to 8 sheets
Up to 10 sheets
Up to 3 sheets
*34 Image's gray background control at power ON
If an image
while making about 100 copies after power ON
(the fixing temperature is 50°C or lower), set bits
0, 1, 3, 5, 6, and 7 of DIPSW27 to 1.
Note: When this setting is used, be sure to set
23-3 23-2
0
0
0
1
1
0
1
1
24-5 24-4
0
0
0
1
1
0
1
1
24-7 24-6
0
0
0
1
1
0
1
1
2-22
s gray background problem occurs
'
six bits to 1 all together. And never set bits
2 and 4 of DIPSW27 to 1.
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