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MX-M700N ADJUSTMENTS 6 – 3
1-B
Adjust the developing bias voltage
This adjustment is needed in the following situations:
* The high voltage power PWB (MC/DV/TC) has been replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
(Main charger grid voltage adjustment)
1)
Remove the rear cover of the machine.
2)
Apply a digital multi-meter to the connector CN2 pin (7) of the
high voltage PWB and the chassis GND.
3)
Go through the modes specified in Simulation 8-1.
4)
Select the number that corresponds to the adjustment item
using the numeric keypad.
5)
Press the Start key.
6)
Press the start key to have the voltage output for 30 seconds.
The operation can be stopped with the SYSTEM SETTINGS
key.
If the output voltage is not within the requirement, do the fol-
lowing steps.
7)
Enter the adjustment value using the numeric keypad.
8)
Press the Start key. (The adjustment value is put into memory,
and the corresponding voltage is output for 30 seconds.)
Repeat steps 7 to 8 until the output requirement is satisfied.
1-C
Adjust the transfer current, voltage
(Transfer voltage adjustment)
* MX-M700 only
Item/operation mode
Simulation
High voltage power PWB (MC/DV/TC)
Setting range
Default
Connector
Pin #
Actual voltage
Copy
Auto mode
8-1
AUTO
0 – 750
495
CN2
7
–500
r
5v
Text mode
CHARACTER
0 – 750
495
CN2
7
–500
r
5v
Text/photo mode
MIX
0 – 750
495
CN2
7
–500
r
5v
Photo mode
PHOTO
0 – 750
495
CN2
7
–500
r
5v
Printer
All modes
PRINTER
0 – 750
495
CN2
7
–500
r
5v
FAX
All modes
FAX
0 – 750
495
CN2
7
–500
r
5v
Cleaning mode
PLUS
0 – 250
150
CN2
7
+500
r
5v
Press [START] key.
Press [SYSTEM SETTINGS] key.
CN2
3
SIMULATION 8-1
1
DV BIAS SETTING. SELECT 1-7, AND PRESS START.
1.AUTO
495
2.CHARACTER
495
3.MIX
495
4.PHOTO
495
5.PRINTER
495
6.FAX
495
7.PLUS
150
Press [START] key.
Press [SYSTEM SETTINGS] key.
Or after 30sec output.
SIMULATION 8-1
DV BIAS SETTING. INPUT VALUE, AND PRESS START.
1:AUTO (0-750)
495
SIMULATION 8-1
DV BIAS SETTING. EXECUTING···.
1:AUTO
495
Item/
operation
mode
Simulation
Adjustment
voltage
(monitor voltage)
Connector
Pin #
Actual voltage
/actual current
Setting
range
Default
Front print
8-6
FRONT
0 – 800
350
–
–
–
35
r
1.0
P
A (1.0 – 1.5Kv)
High voltage
power PWB
(MC/DV/TC)
400 *
40
r
1.0
P
A (2.0 – 2.5Kv) *
Back print
BACK
0 – 800
350
–
–
–
35
r
1.0
P
A (1.0 – 1.5Kv)
400 *
40
r
1.0
P
A (2.0 – 2.5Kv) *
Transfer belt
(cleaning)
8-17
SHV FRONT
0 – 600
450
–
–
–
AC4.5Kv (p-p)
SHV BACK
0 – 600
450
–
–
–
AC4.5Kv (p-p)
THV-
0 – 75
10
DC – 100
r
10v CN2
1
DC
–100
r
10v/AC4.5Kv (p-p)
Transfer
roller
(cleaning)
8-18
CRHV PLUS
0 – 250
200
+2.0
r
10.1v
–
Check
pin
+2000
r
100v
High voltage
power PWB
(TC cleaning)
Transfer
roller (print)
CRHV MINUS
0 – 250
200
–2.0
r
10.1v
–
Check
pin
–2000
r
100v