Sharp MX-4100N Service Manual page 49

4-B Adjust the developing bias voltage
This adjustment is needed in the following situations:
* When the MC/DV high voltage power PWB is replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
Item
MIDDLE A MIDDLE SPEED DVB_K
B MIDDLE SPEED DVB_C
C MIDDLE SPEED DVB_M
D MIDDLE SPEED DVB_Y
LOW A LOW SPEED DVB_K
B LOW SPEED DVB_C
C LOW SPEED DVB_M
D LOW SPEED DVB_Y
Mode
K Developing bias voltage (Middle speed mode)
C Developing bias voltage (Middle speed mode)
M Developing bias voltage (Middle speed mode)
Y Developing bias voltage (Middle speed mode)
K Developing bias voltage (Low speed mode)
C Developing bias voltage (Low speed mode)
M Developing bias voltage (Low speed mode)
Y Developing bias voltage (Low speed mode)
MX-5001N ADJUSTMENTS 5 – 7
1) Go through the modes specified in Simulation 8-1.
10-key
EXECUTE
2) Select an output mode to be adjusted with the mode key and
the scroll key.
3) Enter the adjustment value (specified value) of the middle
speed mode and press [OK] key.
Adjustment
range
Monitor voltage
(Specified value)
0-600
0-600
0-600
0-600
0-600
0-600
0-600
0-600
EXECUTE
or after 30 sec.
Monitor (MC/DV high
voltage PWB)
Actual
voltage
Check
pin
19.2 ± 1.2V
BS-K -450V
19.2 ± 1.2V
BS-C -450V
19.2 ± 1.2V
BS-M -450V
19.2 ± 1.2V
BS-Y -450V
19.2 ± 1.2V
BS-K -450V
19.2 ± 1.2V
BS-C -450V
19.2 ± 1.2V
BS-M -450V
19.2 ± 1.2V
BS-Y -450V