Read Sharp AR-C330 (serv.man5) Service Manual online
AR-C330 SETTING AND ADJUSTMENTS 7 - 41
This adjustment must be performed in the following cases:
• When the fusing section is disassembled.
• When a fusing trouble occurs.
• When wrinkles are generated on paper in the fusing section.
1) Select A4 (8.5 x 11) paper.
2) With the document cover open, press the start key of mono-
chrome copy.
3) A copy of black background is made.
4) Pull out the transfer section.
5) Insert paper into the pre-transfer paper guide, and turn the fus-
ing roller knob.
6) With the paper squeezed in the pre-transfer paper guide, wait
for about 10sec.
7) Turn the fusing roller knob to remove the paper from the fusing
section.
8) Measure the dimension (L) of the center section of the glitter-
ing line made by the fusing roller. Check that the dimension is
in the specified range.
in the specified range.
Check that the pressure balance between the front and the
rear frame sides is proper.
rear frame sides is proper.
If the above condition is not satisfied, perform the following proce-
dure.
dure.
9) Turn the pressure adjustment screw on the front and the rear
frame sides of the fusing unit to adjust the fusing pressure.
Repeat procedures 2) – 9) until the condition of procedure 8) is
satisfied.
satisfied.
This adjustment must be performed in the following cases:
• When a part in the DC power unit is replaced.
1) Put the multi-meter on the 3.4V line of the DC main PWB and
GND.
2) Turn VR704 on the DC main PWB to adjust so that the voltage
is 3.4V.
1) Put the multi-meter on the 5.0V line of the DC main PWB and
GND.
2) Turn VR703 on the DC main PWB to adjust so that the voltage
is 5.0V.
1) Put the multi-meter on the 24V line of the DC main PWB and
GND.
2) Turn VR702 on the DC main PWB to adjust so that the voltage
is 24.0V.
ADJ M22
Fusing pressure adjustment
Value L
6.5 – 7.5 mm
ADJ M23
Power voltage adjustment
ADJ 1
3.4V power voltage adjustment
ADJ 2
5.0V power voltage adjustment
ADJ 3
24V power voltage adjustment
LR
L (Center)
LF
LR = LF
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