Sharp MX 3501N - Color Laser - Copier, Service Manual

Page: 52 / 448

MX3500N ADJUSTMENTS 6 – 7
1) Remove the main unit rear cover.
2) Open the PWB frame.
3) Enter SIM8-1 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 developing bias voltage is outputted for 30sec.
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-C Transfer voltage adjustment
This adjustment must be executed in the following cases:
* When the TC high voltage power PWB is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)
Enter SIM8-6 mode.
2) Select a mode to be adjusted with the scroll key.
3) Enter an adjustment value (specified value) and press [OK]
key.
By setting the default value (specified value), the specified
voltage is outputted.
When [EXECUTE] key is pressed, the transfer voltage is out-
putted.
1
2
CNMON
1
EXECUTE
EXECUTE
A:
ġ
A ȇ xxx
B ȇ xxx
C ȇ xxx
Ȉġ TC1 LOW SPEED ġġ CL K
Ȉġ TC1 MIDDLE SPEED CL K
Ȉġ TC1 LOW SPEED CL CMY
SIMULATION ġ NO.08-06
THV SETTING AND OUTPUT
xxx
0 255
OK
TEST
EXECUTE
0
D ȇ xxx Ȉ TC1 MIDDLE SPEED_CL CMY
CLOSE
A:
ġ
A ȇ xxx
B
ȇ
xxx
C ȇ xxx
Ȉ TC1 LOW SPEED CL K
Ȉ
TC1 MIDDLE SPEED CL K
Ȉ TC1 LOW SPEED CL ġ CMY
SIMULATION
ġ
NO.08-06
THV SETTING AND OUTPUT
xxx
ġ 0 255
OK
TEST
EXECUTE
0
D ȇ xxx Ȉ TC1 MIDDLE SPEED_CL CMY
CLOSE
10-key
or after 30 sec.