Kyocera Mita DC-1560, Руководство по обслуживанию

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1AF
1-3-13
Surface potential correction control
The drum surface potential is corrected for the external temperature and humidity. If the
external temperature is 24°C/75.2°F or less and the absolute humidity exceeds 25.0 g/m
3
,
the drum surface potential is corrected as in the table bellow. The external temperature and
relative humidity are detected by the external temperature thermistor (ETTH) and humidity
sensor (HUMSENS) and the absolute humidity is calculated from these values. The surface
potential is corrected by varying the grid control voltage (GRID CONT) output from the main
PCB (MPCB) to the high-voltage transformer PCB (HVTPCB).
Table 1-3-1 Surface potential correction value vs. absolute humidity
Absolute
humidity
(g/m
3
)
Correction
value
(V)
Absolute
humidity
(g/m
3
)
Correction
value
(V)
Absolute
humidity
(g/m
3
)
Correction
value
(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0 20.5
21.0
21.5
22.0
22.5
23.0
23.5
24.0
24.5
25.0
25.5
26.0
26.5
27.0
27.5
28.0
28.5
29.0
29.5
30.0 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 0
0
0
0
0
0
0
0
0
0
–4
–8
–12
–16
–20
–24
–28
–32
–36
–40