1. Grid step setting
Set the grid output on the [4-01] screen. The potential on the area of the OPC that was exposed to
the black area of the PC-1 chart should be --710±10 volts, after setting. This potential is displayed
on the [4-03] screen.
1. Turn ON the main switch and wait for the copy stand-by condition.
2. Select a paper tray that has A3 or 11"x17" paper. If there is no tray with such paper, adjust
the side fences and back fence of one paper tray at the A3 size position.
3. Access service tool [4-01].
4. Press the Process Control OFF key, then press the ON key to reset all shift steps to 0.
5. Select the [4-03] screen.
6. Set the PC-1 chart on the exposure glass so that the black area comes to the original scale
side.
7. Press the Start key. The machine automatically stops after 10 flashes.
8. Read the AID reference voltage during flashing. If the mean value is between --700 and --
720 volts, proceed to the next step (flash step setting). If the [4-01] screen shows any VR,
check the standard value so that:
Standard value: between --(700 + VR) and --(720 + VR) volts
NOTE
The target and actual voltage (except the target and actual
VPCC’s) on the [4-01] and [4-03] screens are negative.
9. If the mean value is improper, select the [4-01] screen and change the grid setting step with
the value change keys (▲▼) on the process control OFF screen. Changing one step will
change approximately 25 volts in the AID reference voltage.
10. Press the Process Control ON key on the screen and be sure that all shift steps are 0. Then,
select the [4-03] screen again and repeat steps 6 to 9.
2. Flash step setting
Set the flash output on the [4-01] screen. The potential on the area of the OPC that was exposed to
the white area of the PC-1 chart should be -125 ± 10 volts, after setting. This potential is displayed
on the [4-03] screen.
1. Select the [4-01] screen.
2. Press the Process Control OFF key, then press the ON key to reset all shift steps to 0.
3. Select the [4-03] screen.
4. Set the PC-1 chart on the exposure glass, so that the white area comes to the original scale
side.
5. Press the Start key. The machine automatically stops after 10 flashes.
6. Read the AID reference voltage during flashing. If the mean value is between --115 and --
135 volts, proceed to the next step (target VL and VD setting). If the [4-01] screen shows
any VR, check the standard value so that:
Standard value: between --(115 + VR) and --(135 + VR) volts
NOTE
The target and actual voltages (except the target and actual
VPCC’s) on the [4-01] and [4-03] screens are negative.
1 July 1994 Setting A
5-5
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