Read Sharp AR-C260 (serv.man11) Service Manual online
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 4
7) Apply a digital multi-meter to the connector pins of the high voltage
adjustment harness corresponding to the output mode to be
adjusted.
adjusted.
8) Press the [EXECUTE] key.
The developing bias voltage is outputted for 30sec.
If this operation is performed for a long time, the OPC drum and
the developing roller may be damaged. Be careful to perform this
operation in a short time.
the developing roller may be damaged. Be careful to perform this
operation in a short time.
It is advisable to install an unnecessary developing unit and unnec-
essary OPC drums to the machine for this adjustment.
essary OPC drums to the machine for this adjustment.
9) Check the monitor voltage with the digital multi-meter.
If the monitor voltage is not in the above specified range, change
the adjustment value and adjust again. If the specified voltage is
not obtained even by changing the adjustment value, the following
parts may be judged as defective.
the adjustment value and adjust again. If the specified voltage is
not obtained even by changing the adjustment value, the following
parts may be judged as defective.
High voltage PWB
PCU PWB
Developing unit
Photoconductor unit
High voltage circuit electrode
This adjustment must be performed in the following cases:
• When the high voltage power PWB is replaced.
• When a U2 trouble occurs.
• When the PCU PWB is replaced.
• When the EEPROM of the PCU PWB is replaced.
1) Enter the SIM 8-6 mode.
SIM 8-6
2) Select the mode to be adjusted with the color key and scroll key.
3) Enter the adjustment value (specified value), and press the [OK]
key.
By entering the default value (specified value), the specified volt-
age is outputted.
age is outputted.
Press the [EXECUTE] key to output the transfer voltage.
The image density sensor sections are of uneven quality in parts and
assembly. This causes variations in the absolute detection level
between machines. This adjustment (calibration) is performed to cor-
rect the variations.
assembly. This causes variations in the absolute detection level
between machines. This adjustment (calibration) is performed to cor-
rect the variations.
This adjustment is required in the following cases:
• When the image density sensor is replaced.
• When the transfer unit is replaced.
• When maintenance is performed.
• When U2 trouble occurs.
• When the PCU PWB is replaced.
• When the EEPROM on the PCU PWB is repalced.
The targets of the adjustment are the color image density sensor and
the black image density sensor. There are following adjustment meth-
ods:
the black image density sensor. There are following adjustment meth-
ods:
• Color image density sensor adjustment (adjustment by the adjust-
ment jig) SIM44-13
• Black image sensity sensor adjustment SIM44-2
• Image density sensor adjustment (The color image density sensor
and the black image density sensor are adjusted at the same time.)
(Simple adjustment) SIM44-36
(Simple adjustment) SIM44-36
Normally the following adjustments are executed:
• ADJ 2A Color image density sensor adjustment (adjustment by the
adjustment jig) (SIM44-13)
• ADJ 2B Black image density sensor adjustment (SIM44-2)
ADJ 1C
Transfer voltage adjustment
Item
Print mode
Standard setting value
(Default)
Adjustment
range
Output voltage (Kv)
K
C
M
Y
K
C
M
Y
A
PLAIN_SPX_CL
Color
Normal paper
117mm/s
173
159
132
132
51 - 255
2.4
2.4
2.4
2.4
B
PLAIN_DPX_CL
Color
Normal paper(Duplex mode)
117mm/s
188
173
142
142
2.7
2.7
2.7
2.7
C
OHP1_CL
Color
Transparency film 1
117mm/s
204
187
153
153
3
3
3
3
D
OHP2_CL
Color
Transparency film 2
58.5mm/s
137
150
153
163
1.7
2.2
3
3.3
E
HEAVY P1_SPX_CL
Color
Thick paper 1
58.5mm/s
158
146
122
122
2.1
2.1
2.1
2.1
F
HEAVY_P1_DPX_CL
Color
Thick paper 1(Duplex mode)
58.5mm/s
188
173
142
142
2.7
2.7
2.7
2.7
G
HEAVY_P2_CL
Color
Thick paper 2
58.5mm/s
173
159
132
132
2.2
2.2
2.2
2.2
H
ENV_CL
Color
Envelope
117mm/s
163
150
125
125
2.2
2.2
2.2
2.2
I
PLAIN_SPX_BW
B & W
Normal paper
140mm/s
168
2.3
J
PLAIN_DPX_BW
B & W
Normal paper(Duplex mode)
140mm/s
178
2.5
K
OHP1_BW
B & W
Transparency film 1
117mm/s
204
3
L
OHP2_BW
B & W
Transparency film 2
58.5mm/s
137
1.7
M
HEAVY_P1_SPX_BW
B & W
Thick paper 1
58.5mm/s
147
1.9
N
HEAVY_P1_DPX_BW
B & W
Thick paper 1(Duplex mode)
58.5mm/s
178
2.5
O
HEAVY_P2_BW
B & W
Thick paper 2
58.5mm/s
163
2.2
P
ENV_BW
B & W
Envelope
140mm/s
168
2.3
Color
Actual output variable range
Voltage change/Adjustment value (1) (Varying amount when the adjustment value is changed by 1)
K
0 to 4000V
About 19.6V
C
0 to 4500V
About 22.1V
M
0 to 6000V
About 29.4V
Y
0 to 6000V
About 29.4V
ADJ 2
Image density sensor adjustment
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