Ricoh A156 - Page 73

Table 14. T/H Correction (Copying) - Base drum charge voltage = -1500
V
A153, A155, and A156 copiers
Drum Charge Roller
Temperature (T )
Drum Rotation Time (H)
0 ≤ H < 40 40 ≤ H < 110 110 ≤ H
37.1 ≤ T
-60.0 -60.0 -60.0
29.6 ≤ T < 37.1
-203.4 + 3.9xT -203.4 + 3.9xT -203.4 + 3.9xT
17.9 ≤ T < 29.6
-729.1 + 21.6xT -923.9 + 28.2xT -1116.1 + 34.7xT
12.6 ≤ T < 17.9
-1345.1 + 56.0xT -1705.8 + 71.9xT -2068.9 + 87.9xT
T < 12.6
-639.0 -800.0 -961.0
A157, A159, and A160 copiers
Drum Charge Roller
Temperature (T)
Drum Rotation Time (H)
0 ≤ H < 40 40 ≤ H < 110 110 ≤ H
32.4 ≤ T
-80.0 -80.0 -80.0
28.2 ≤ T < 32.4
-426.7 + 10.7xT -426.7 + 10.7xT -426.7 + 10.7xT
18.0 ≤ T < 28.2
-621.8 + 17.6xT -768.4 + 22.8xT -912.2 + 27.9xT
12.4 ≤ T < 18.0
-1028.6 + 40.2xT -1357.2 + 55.5xT -1689.7 + 71.1xT
T < 12.4
-530.0 -669.0 -808.0
Table 15. T/H Correction (V
SP
Pattern) - Base drum charge = -1300 V
A153, A155, and A156 copiers
Drum Charge Roller
Temperature (T)
Drum Rotation Time (H)
0 ≤ H < 40 40 ≤ H < 110 110 ≤ H
37.1 ≤ T
+40.0 +40.0 +40.0
29.6 ≤ T < 37.1
-103.4 + 3.9xT -103.4 + 3.9xT -103.4 + 3.9xT
17.9 ≤ T < 29.6
-489.9 + 16.9xT -603.8 + 20.8xT -717.6 + 24.6xT
12.6 ≤ T < 17.9
-862.5 + 37.7xT -1164.2 + 52.1xT -1465.9 + 66.4xT
T < 12.6
-387.0 -508.0 -629.0
A157, A159, and A160 copiers
Drum Charge Roller
Temperature (T)
Drum Rotation Time (H)
0 ≤ H < 40 40 ≤ H < 110 110 ≤ H
32.4 ≤ T
+24.0 +24.0 +24.0
28.2 ≤ T < 32.4
-283.9 + 9.5xT -283.9 + 9.5xT -283.9 + 9.5xT
18.0 ≤ T < 28.2
-402.6 + 13.7xT -532.4 + 18.3xT -662.2 + 22.9xT
12.4 ≤ T < 18.0
-719.3 + 31.3xT -919.5 + 39.8xT -1117.6 + 48.2xT
T < 12.4
-331.0 -426.0 -520.0
For example, when copying with an A157 copier at 25°C with a drum that
has a rotation time of 100 hours:
•
The T/H correction is -768.4 + (22.8 x 25) V = -198.4 V.
•
The drum charge roller voltage is the base voltage plus the T/H correction
= (-1500) - 198.4
= -1698.4 V.
Detailed
Descriptions
STM 2-25 A156/A160/A162