MX3500N ADJUSTMENTS 6 – 5
Remark: By setting the default value, the specified voltage is
normally outputted.
The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.
GBK:XXX GBC:XXX GBM:XXX GBY:XXX
When the adjustment value (specified value) of the middle speed
mode is set, the adjustment values of the other modes are auto-
matically set according to the middle speed mode setting in a cer-
tain relationship.
To adjust all the modes individually, first adjust the middle speed
mode, and then adjust the other mode.
If the middle speed mode is adjusted after adjustment of all the
modes individually, the adjustment values of the other modes are
automatically changed. Use care for that.
Therefore, unless there may be an abnormality in the output volt-
age, there is no need to check the output value.
If it must be checked that the normal voltage is outputted or if an
adjustment is required by referring to the output voltage, follow the
procedures below.
1) Remove the main unit rear cover.
2)
Open the PWB holder.
3)
Enter SIM8-2 mode.
4)
Select an output mode to be adjusted with the mode key and
the scroll key.
5)
Check the relationship between the pin No. of the connector
CNMON on the MC/DV high voltage PWB and each adjust-
ment mode.
6)
Apply a digital multi-meter to the connector CNMON pin on the
MC/DV high voltage PWB corresponding to the adjusted
mode.
7)
Press [EXECUTE] key.
The main charger grid voltage is outputted for 30sec.
If this procedure is executed for a long time, the OPC drum
and the developing roller may be adversely affected. Use this
procedure as short as possible.
If possible, it is recommendable to use an unnecessary devel-
oping unit and an unnecessary OPC drum for this adjustment.
8)
Check the monitor voltage with the digital multi-meter.
If the monitor voltage is not in the range of the specified values
shown in the table above, change the adjustment value and
adjust again. If the specified value voltage is not obtained even
though the adjustment value is changed, the following parts
may be defective.
MC/DV high voltage PWB
PCU PWB
Developing unit
OPC drum unit
High voltage circuit electrode
4-B
Developing bias voltage adjustment
This adjustment must be executed in the following cases:
* When MC/DV high voltage power PWB is replaced.
* When U2 trouble occurs.
* When PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
Item Mode
Adjustment value
Monitor (MC/DV high voltage PWB)
Actual
voltage
Adjustment
range
Default
value
Monitor voltage
(Specified value)
Connector
Pin
No.
MIDDLE
A
MIDDLE SPEED GB_K
K
Main charger grid voltage
(Middle speed mode)
230 – 850
645
53.6
±
1.61V
CNMON
8
–615V
B
MIDDLE SPEED GB_C
C
Main charger grid voltage
(Middle speed mode)
230 – 850
645
53.6
±
1.61V
CNMON
6
–615V
C
MIDDLE SPEED GB_M
M
Main charger grid voltage
(Middle speed mode)
230 – 850
645
53.6
±
1.61V
CNMON
4
–615V
D
MIDDLE SPEED GB_Y
Y
Main charger grid voltage
(Middle speed mode)
230 – 850
645
53.6
±
1.61V
CNMON
2
–615V
LOW
A
LOW SPEED GB_K
K
Main charger grid voltage
(Low speed mode)
230 – 850
620
52.7
±
1.58V
CNMON
8
–605V
B
LOW SPEED GB_C
C
Main charger grid voltage
(Low speed mode)
230 – 850
620
52.7
±
1.58V
CNMON
6
–605V
C
LOW SPEED GB_M
M
Main charger grid voltage
(Low speed mode)
230 – 850
620
52.7
±
1.58V
CNMON
4
–605V
D
LOW SPEED GB_Y
Y
Main charger grid voltage
(Low speed mode)
230 – 850
620
52.7
±
1.58V
CNMON
2
–605V
1
2
Summary of Contents for MX 3501N - Color Laser - Copier
Page 64: ...MX3500N ADJUSTMENTS 6 19 E F Yellow C D Magenta A B Cyan ...
Page 390: ...MX3500N PHOTOCONDUCTOR SECTION i 7 3 6 7 9 8 10 2 5 7 9 1 4 11 ...
Page 444: ...Memo ...
Page 445: ...Memo ...