Sectional Descriptions (Compared With F21); Process; Drum Current; Rest Time Compensation - Ricoh FT7770 Service Manual

3. SECTIONAL DESCRIPTIONS (Compared
with F21)
3 . 1 P R O C E S S
The drum current, the rest time compensation and the toner end condition
have been changed because of the higher speed (380 mm/s to 420 mm/s).

3.1.1 Drum Current

The following drum currents has been increased by adjusting the current
power packs; this has been done to keep the copy quality the same as the
F21.
See the new values in the adjustment section.
. Charge corona
. Pre-transfer corona (ac and dc)
. Transfer corona (T1 and T2)
. Separation corona D1 (DC) D3 (DC)

3.1.2 Rest Time Compensation

The rest time compensation table has been changed to keep the ID level the
same as the F21. See the table.
Rest Time Compensation (V3):
Copy #
Rest Time
0 to 1 minute
1 to 6 minutes
6 to 30 minutes
0.5 to 3 hours
Over 3 hours
1
2
30 30
60 30
60 –> 30
90 –> 60
120 –> 60 90 –> 60
150 –> 90 120 –> 60 90 –> 30
3, 4
0
0
30
60 –> 30
60 –> 30
15-5
10 August 1990
5, 6 7-11
0
0
0 0
0 0
30
0
30 –> 0
12
0
0
0
0
0