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[6] ADJUSTMENTS
1. Adjustment item list
Section
Adjustment item
Adjustment procedure/SIM No.
A
Process section
(1)
Developing bias voltage output adjustment
(2)
Grid bias voltage adjustment
B
Mechanism section
(1)
Image lead edge position adjustment
SIM 50-1/SIM 50-10
(2)
Main scanning direction (FR direction)
distortion balance adjustment
distortion balance adjustment
No. 2/3 mirror base unit installing position
adjustment
adjustment
Copy lamp unit installing position adjustment
(3)
Main scanning direction (FR direction)
distortion adjustment
distortion adjustment
Rail height adjustment
(4)
Sub scanning direction (scanning direction)
distortion adjustment
distortion adjustment
Winding pulley position adjustment
(5)
Main scanning direction (FR direction)
magnification ratio adjustment
magnification ratio adjustment
SIM 48-1
(6)
Sub scanning direction (scanning direction)
magnification ratio adjustment
magnification ratio adjustment
a
OC mode in copying (SIM 48-2)
b
SPF mode in copying (SIM 48-5)
(7)
Off center adjustment
a
OC mode (SIM 50-13)
b
SPF mode (SIM 50-16)
(8)
OC (SPF) open/close detection position
adjustment
adjustment
(9)
Original sensor adjustment
SIM 43-3
C
Image density adjustment
(1)
Copy mode
SIM 46-1
2. Copier adjustment
A. Process section
(1) Developing bias voltage adjustment
Note:
Note:
● Use a digital multi-meter with an internal resistance of 10 MΩ
or more.
1) Set the digital multi-meter range to DC700V.
2) Put the test rod of the digital multi-meter on the developing bias
2) Put the test rod of the digital multi-meter on the developing bias
voltage output check pin.
3) Turn on the power.
4) Adjust the adjustment volume VR31 so that the output voltage is
4) Adjust the adjustment volume VR31 so that the output voltage is
within the specified range shown below.
<Adjustment specification>
Mode
Specification
Developing bias voltage
DC-400
± 8V
VR31
(2) Grid bias voltage adjustment
Note:
Note:
● Use a digital multi-meter with an internal resistance of 10MΩ
or more.
1) Set the digital multi-meter range to DC700V.
2) Put the test rod of the digital multi-meter on the grid bias voltage
2) Put the test rod of the digital multi-meter on the grid bias voltage
output check pin.
3) Turn on the power.
4) Adjust the adjustment volumes (VR51, VR52) so that the output
4) Adjust the adjustment volumes (VR51, VR52) so that the output
voltage is within the specified range. (The voltage is outputted in
the grid bias high output mode during warming up, and in the grid
bias low output mode after completion of warming up.)
the grid bias high output mode during warming up, and in the grid
bias low output mode after completion of warming up.)
5) Adjust the adjustment volume VR51/VR52 so that the output volt-
age is within the specified range shown below.
<Adjustment specification>
Mode
Specification
Grid bias LOW
DC-400
± 20V
VR52
Grid bias HIGH
DC-525
± 10V
VR51
DM-2000
6 – 1
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