Minolta EP3010 Manual page 34

<Relation with Image Density>
The "Image Exposure" function of "Tech. Rep. Choice" available from the Tech. Rep. mode
enables fine-adjustments of the grid voltage (solid-black image density) to be made. It
specifies how many volts the optimum grid voltage determined by the image stabilization
control is to be increased or decreased. This fine-adjustment value remains the same even
when the optimum grid voltage is later varied by the image stabilization control.
Controlled Part
Grid voltage output from
High Voltage Unit HV1
3. Optimum Exposure Lamp voltage correction
The Exposure Lamp is turned ON to illuminate the halftone patch on the back of the Origi-
nal Width Scale, thereby producing a halftone pattern on the surface of the PC Drum. The
Exposure Lamp voltage is then varied so that the output from the AIDC Sensor falls within
the target range, thereby ensuring an optimum exposure level.
Exposure Lamp voltage
(100V Areas)
Exposure Lamp voltage
(200V Areas)
<Relation with "Manual Exposure Level" of F5>
The "manual exposure level" of Function F5 available from the Tech. Rep. mode enables
fine-adjustments of the Exposure Lamp voltage (halftone image density) to be made. It
specifies how many volts the optimum Exposure Lamp voltage determined by the image
stabilization control is to be increased or decreased. This fine-adjustment value remains
the same even when the optimum Exposure Lamp voltage is later varied by the image sta-
bilization control.
Controlled Part
Exposure Lamp
Regulator (PU2) REM
4. AE Sensor gain adjustment
The Exposure Lamp is turned ON to illuminate the blank sheet of paper placed on the Orig-
inal Glass (when an F5 or FF operation is run) or the halftone patch on the back of the Orig-
inal Width Scale (when AE Sensor gain is adjusted in a sequence other than F5 or FF).
The reflected light is then read by the AE Sensor and a gain adjustment of the AE Sensor is
made to maintain an optimum Auto exposure level.
Controlled Part
AE Sensor Board PWB-H
Control Signal
PJ27A-1
Control Value
47 to 75V
94 to 140V
Control Signal
PJ36A-3
Control Signal
PJ5A-2
M-16
ON OFF WIRING DIAGRAM
Pulse Output
1 Step
1V
2V
ON OFF WIRING DIAGRAM
Pulse output
ON OFF WIRING DIAGRAM
Pulse Output
1-F
Initial Value
58V
116V
22-B
8-F