Before removing the developer, enter the SP mode and check the current toner density.
Table 1 Toner density check SP
SP No.
Color
SP 3-200-001
K
SP 3-200-002
C
SP 3-200-003
M
SP 3-200-004
Y
If the toner density is 7%±0.5, skip the following steps and go to PART 2.
If the toner density is not 7%±0.5 (7.5% or higher), continue this procedure.
Refer to the table below and determine the print volume according to the toner density that was found in the previous step. The actual printing will be done in step 5.
Table 2 Print volume based toner density and paper size
Toner Density
A4/LT
A3/DLT
12%
110
55
11%
90
45
10%
70
35
9%
45
23
8%
20
10
7.5%
10
5
7%
0
0
Refer to the tables below and change the SP values for toner supply mode and supply rate to “0” for the development unit(s) requiring developer replacement.
Table 3-1 Toner Supply Mode
SP No.
Color
Default
Change to
SP 3-400-001
K
4
0
SP 3-400-002
C
4
0
SP 3-400-003
M
4
0
SP 3-400-004
Y
4
0
- The default value “4” supplies toner in DANC (Divided Image Active Noise Control) mode.
- The changed value “0” supplies toner in constant supply mode.
Table 3-2 Toner Supply Rate
SP No.
Color
Default
Change to
SP 3-440-001
K
5
0
SP 3-440-002
C
5
0
SP 3-440-003
M
5
0
SP 3-440-004
Y
5
0
Select test pattern “26” from SP2-109-003 and specify the color in SP2-109-005.
Table 4 Test Pattern Settings
SP No.
Settings
SP 2-109-003
26
Solid
SP 2-109-005
Specify color
Print the test pattern on A4/LT or A3/DLT for the print volume determined in step 2.
Check the latest toner density in SP3-200-001 to 004. (Table 1)
Repeat steps 1 to 5 until you achieve the standard toner density 7%±0.5.
Set the SP settings for toner supply mode and supply rate (changed in step 3) back to the default values; “4” for toner supply mode and “5%” for supply rate.
- Make sure to set the toner supply mode and supply rate back to the defaults. Otherwise, image density will appear light.
Continue with the procedure in “Part 2”.