Process Section - Olivetti d-Copia 3501 Service Manual

[8] ADJUSTMENTS
No. Section
1 Process A Doctor gap adjustment
section
B MG roller main pole position adjustment
C High voltage output adjustment
2 Image A Adjustments
check, on the engine
adjustment side
B Adjustment
on the
scanner side
3 Scanner A OC scan distortion adjustment
section
B Vertical image distortion balance
adjustment
C Vertical image distortion balance
adjustment
D Vertical (sub scanning direction) distortion
adjustment
E Height adjustment of original detection light
emitting unit
F Original size detection photo sensor check
G Original size detection photo sensor
adjustment
H Image density adjustment
I DSPF width detection adjustment

1. Process section

A. Doctor gap adjustment
This adjustment is performed in the following cases:
• When developer is scattered.
• When an uneven image is produced.
1) Remove the developer cartridge and the developing unit from
the machine.
2) Remove the DV cover and the developer from the developing
unit.
3) Remove the DVR cover, the DVF handle, the idle correction
plate assembly, and the HG gear 22T, insert a thickness
gauge (0.46mm) as shown in the figure below, and check that
the clearance is within the specified range.
If the clearance is not within the specified range, adjust the doctor
gap in the following procedures.
4) Loosen the developing doctor fixing screw A.
5) Insert the thickness gauge (0.46mm) again as shown in the
figure below.
6) Push the developing doctor in the arrow direction and tighten
the fixing screw.
Y105220-6
Adjustment item
<1> LSU right angle
adjustment
<2> Print off-center
adjustment
<3> Each tray resist
amount setting
<4> Self print lead edge
adjustment
<5> Front/rear and left/right
void amount setting
<1> OC scan distortion
adjustment
<2> SPF height adjustment
<3> SPF scan distortion
adjustment
<4> OC scan magnification
ratio adjustment
<5> SPF scan
magnification ratio
<6> OC scan lead edge
adjustment
<7> SPF scan lead edge
adjustment
<8> Original off-center
adjustment
Sevice Manual
7) Check the developing doctor gap. If the clearance is within the
specified range, fix the screw with screw lock.
8) After completion of the job, apply screw lock.
20mm
<Adjustment specification>
Both sides
(Position at 20 - 50mm)
Center
B. MG roller main pole position adjustment
This adjustment is performed in the following cases:
• When developer is scattered.
• When an uneven image is produced.
1) Remove the developer cartridge and the developing unit from
the machine.
2) Remove the DV cover and the developer from the developing
unit.
3) Remove the DVF handle and put the developing unit on a flat
surface.
4) Bind a string to a needle.
5) Hold the string and move the needle toward the MG roller.
(Since the MG roller diameter is small, use of a clip cannot
make an accurate adjustment.)
6) With the needle tip 2 - 3 mm apart from the MG roller surface,
mark the point on the MG roller in the elongated line of the
needle.
(Keep the needle and the MG roller apart from each other.)
7) Measure the distance from the marking position to the P sur-
face of the developing unit, and check that the distance is
within the specified range.
If the distance is not within the specified range, perform the adjust-
ment in the following procedures.
8) Loosen the fixing screw of the main pole fixing plate.
20mm
Ambient
Specification
temperature
0.45±0.03mm 5 - 30°C
0.45 - 0.60mm
8-1