Minolta EP1030 - Toner Control and Drum Charging; Drum Charging System

1159SBM0S02A
9-2. Toner Replenishing Control
| When Power is Turned ON |
@ if the toner-to-carrier ratio (T/C) data stored in memory when power was last tumed
OFF is “less than -1%” of the set level, the copier is set into the auxiliary toner eeplen:
ishing sequence after it has completed warming up.
During a Copy Cycle
e The copier detects T/C at the start of exposure for each copy cycle and, if the reading
is lower than the set level, it replenishes the supply of the amount of toner equivalent
to one complete turn of the Toner Bottle, (1 St-stage replenishing).
U
e When the copier goes through 1st-stage replenishing four times, it replenishes the
supply of the amount of toner equivalent to three complete turns of the Toner Bottle
(2nd-stage replenishing). |
e After carrying out 2nd-stage replenishing five times, the copiertakes a reading of the
TIC ratio. If the reading is ess than -1%Cof the set level, the copier is set into the
auxiliary toner replenishing sequence. (Auxiliary toner replenishing = Two turns of
Toner bottle x max. 10 times)
« If the T/C reading is fess than -1%Uof the set level after the auxiliary toner replenish-
ing sequence, it results in a toner-empty condition.
M-20
1159SBM1 000A
ie) DRUM CHARGING
The PC Drum Charge Corona has a Scorotron grid to deposit a negative DC charge
evenly across the surface of the PC Drum. The grid voltage (VG) applied to the grid
mesh is -590V +20V.
The Corona Unit has a Comb Electrode which minimizes the amount of ozone
produced. The conventional wire type corona unit produces a large amount of
ozone due to corona discharge in radial directions. The comb electrode type, on the
other hand, discharges only toward the Grid Mesh, meaning a reduced amount of
ozone is produced.
Holder Comb Electrode Spring © Holder
T1SSMO30AA
Grid Mesh
<Normal Mode>
Start Ki i |
af OFF
Scanner Home Position Sensor
(PC2)
2 AS4 maa 134, 1msec.
ON
PC Drum Charge Corona
OFF
1159TOIMCA
<SDH Mode>
ES, Be ON cP
SOH Registration Clutch j
OFF
(CL10) H 435 4msec.
ON t
PC Drum Charge Corona
OFF
HE9TO2MCA
| OFF | WIRING DIAGRAM
| =| Control Signal WIRING DIAGRAM
Grid Voltage
PWB-A PJ8A-3
(VG)
M-21