High Voltage Adjustments; Main Charger Grid Voltage Adjustment - Sharp MX-2300 G Service Manual

1) With the front cabinet open, enter SIM25-2.
SIMULATION NO.25-02
TEST
AUTOMATIC DEVELOPER ADJUSTMENT
xxx
AT DEVE ADJ_L_K :
xxx
AT DEVE ADJ_L_C :
xxx
AT DEVE ADJ_L_M :
AT DEVE ADJ_L_Y : xxx
K C M
Y
K
M
EXECUTE
SIMULATION NO.25-02
TEST
AUTOMATIC DEVELOPER ADJUSTMENT
: xx
TCD_K
: xx
TCD_C
xx
:
TCD_M
: xx
TCD_Y
K C M
Y
Adjustment completed
SIMULATION NO.25-02
TEST
AUTOMATIC DEVELOPER ADJUSTMENT
xxx
AT DEVE ADJ_L_K :
AT DEVE ADJ_L_C : xxx
xxx
AT DEVE ADJ_L_M :
xxx
AT DEVE ADJ_L_Y :
K C M Y
SIMULATION NO.25-02
TEST
Abnormal
AUTOMATIC DEVELOPER ADJUSTMENT
end
EE-EL
:
TCD_K
: xx
TCD_C
: EE-EL
TCD_M
xx
:
TCD_Y
K
C M
Y
2) Close the front cabinet.
3) Select a developing unit to be adjusted.
4) When [EXECUTE] key it pressed, it is highlighted. The devel-
oping roller rotates, and the toner sensor detects toner density,
and the output value is displayed.
The above operation is executed for 3 minutes, and the aver-
age value of the toner density sensor detection level is set
(saved) as the reference toner density control value.
When the reference toner density control adjustment operation
is completed, [EXECUTE] key display return, to normal from
highlight. This makes you know whether the adjustment opera-
tion is completed or not.
The above operation is executed each of the lower speed
mode and the middle speed mode, and the reference toner
density control value is set for each of them.
NOTE: If the operation is interrupted within 3 minutes, the
adjustment result is not reflected (enabled).
When [EXECUTE] key is pressed during rotation, the opera-
tion is stopped and [EXECUTE] key returns to the normal dis-
play.
If [EE-EU], [EE-EL], or [EE-EG] is displayed, setting of the ref-
erence toner density control value is not completed normally.
0
CLOSE
xxx
AT DEVE VO_L_K :
xxx
AT DEVE VO_L_C :
xxx
AT DEVE VO_L_M :
AT DEVE VO_L_Y : xxx
EXECUTE
1/2
EXECUTE
or process interrupt
0
CLOSE
: xx
TCV_K
: xx
TCV_C
xx
:
TCV_M
: xx
TCV_Y
EXECUTE
1/1
0
CLOSE
xxx
AT DEVE VO_L_K :
AT DEVE VO_L_C : xxx
xxx
AT DEVE VO_L_M :
xxx
AT DEVE VO_L_Y :
EXECUTE
1/2
0
CLOSE
:
TCV_K
:
TCV_C
:
TCV_M
:
TCV_Y
EXECUTE
1/1
MX-2300/2700 N/G ADJUSTMENTS 6 – 4
Error
Error name
display
EE-EL EL abnormality Sensor output level, 1.5V or below; control
voltage, 8.0V or above
EE-EU EU abnormality Sensor output level, 3.45V or above;
control voltage, 2.0V or below
Sensor output level, other than 2.5V ± 0.2V
EE-EC EC abnormality
5) Use SIM24-5 to clear the developer counter.
6) Use SIM44-27 to clear the half-tone correction data.
NOTE:
a) When replacing developer, always replace all the three
colors of Yellow, Magenta, and Cyan.
If only one color is replaced, color balance may be
adversely affected. Black developer can be replaced indi-
vidually.
b) After replacement of developer or the photoconductor, be
sure to execute SIM44-27 to clear the half-tone correction
data.
If the above procedure is neglected, the half-tone correc-
tion may not be performed correctly.
4

High voltage adjustments

4-A

Main charger grid voltage adjustment

This adjustment must be executed in the following cases:
* When the MC/DV 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 SIM8-2 mode.
SIMULATION NO. 08-02
TEST
MHV/GRID SETTING AND OUTPUT
A : xxx ; MIDDLE SPEED GB_K
A: xxx
B: xxx ; MIDDLE SPEED GB_C
C: xxx ; MIDDLE SPEED GB_M
230 850
; MIDDLE SPEED GB_Y
D: xxx
MIDDLE LOW
10-key
EXECUTE
SIMULATION NO.08-02
TEST
MHV/GRID SETTING AND OUTPUT
A : xxx ; MIDDLE SPEED GB_K
A:
xxx
B: xxx ; MIDDLE SPEED GB_C
C: xxx ; MIDDLE SPEED GB_M
230 850
; MIDDLE SPEED GB_Y
D: xxx
MIDDLE LOW
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.
Detail of error
0
CLOSE
EXECUTE OK
EXECUTE
or after 30 sec.
0
CLOSE
EXECUTE OK