Image Stabilization System - Minolta Di450 Service Manual

5.

IMAGE STABILIZATION SYSTEM

The following image stabilization controls are provided to ensure stabilized copy image.
Item
Initial Setup First correct for AIDC sensor disparity and
contamination. Then use ∆V control to set
initial values for grid voltage (Vg) and
developer bias (Vb).
Short-Term Correct for ID drop caused by change in
Correction drum sensitivity.
Long-Term Cor- Correct for drop in surface potential (sur-
rection face fogging) caused by drum deteriora-
tion.
Morning Cor- Correct for ID drop caused by low drum
rection (first run sensitivity when copier is first power
each morning) switch is turned ON (before copier is fully
warmed up).
Correction After Correct for ID change caused by change
Prolonged Non- in drum sensitivity due to non-usage for at
Use least two hours in the standby state.
T/C Correction Maintain the developing unit's T/C ratio at
a constant level.
Grid Voltage Vg
AIDC Sensor
Rotation Counter
Control Panel
• Adjust Mode
Vg Adjustment
ID Setting
• Utility Mode
Print Density
Density Priority
Forced Toner Resupply
Purpose
PC Drum
IN
CPU
γ Table
V Setting
Toner Resupply Timer
M-6
Method
Set initial values for grid voltage (Vg) and
developer bias (Vb).
Perform ∆V control after every 100 copies.
Correct Vg based on cumulative hours of
drum rotation.
AIDC sensor contamination, use ∆V con-
trol to correct the grid voltage (Vg) and
developer bias (Vb).
When START key is pressed, use ∆V con-
trol to correct Vg and Vb before making
the copy.
Use ATDC to control the toner resupply
LD
Toner Replenishing Motor
(Main/Sub Hopper)
ATDC Sensor
Developer bias (Vb)
OUT
Control Panel
• Settings
4002M505CB