Sharp Mx 2300n Service Manual

MX-2300/2700 N/G  ADJUSTMENTS  6 – 7 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...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 8
 
5Image density sensor, image regis-
tration sensor adjustment
There are some assembly variations in the image density sensor
section. Therefore, the absolute detection level differs in each
machine. To correct this, calibration is executed.
This adjustment must be executed in the following cases:
* When the image density sensor is replaced.
* When the image resist sensor is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 9 If the adjustment is not completed normally, ERROR is displayed.
In that case, check the following sections for any abnormality. If any
abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
* Color image density sensor
* PCU PWB
* Image sensor calibration jig (standard reflection sheet dirt,
scratch, discoloration)
NOTE: Store the image sensor calibration jig under low tempera-
ture, low humidity and dark place.
 5-B...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 10
 
6Image skew adjustment (LSU unit)
This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When the LSU (writing) unit is removed from the main unit.
* When a color image registration mistake occurs.
* When the unit is installed or when the installing site is changed.
(Required depending on the cases.)
* When there is an uneven density area or a difference in color
balance in the main scanning direction (back and...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 11
6) Loosen the LSU (writing) unit fixing screws (2 pcs.) and shift
the skew adjustment screw in the arrow direction to adjust the
LSU (writing) unit skew.
(When Method 1 is used to check the black image for any
skew (right angle) in procedure 4)
When the lengths of the diagonal line are C > D, shift the
adjustment screw in the direction of Y.
When the lengths of the diagonal line are C < D, shift the
adjustment screw in the direction of X.
(When Method 2 is used to...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 12
 7-A OPC drum phase adjustment (Auto adjust-
ment)
1) Enter SIM50-22 mode.
2) Press [ALL] key.
(The machine enters the OPC drum phase adjustment mode/
image registration adjustment (auto adjustment) mode, and
both adjustments are executed simultaneously in this mode.)
The OPC drum phase adjustment and the image registration
adjustment can be individually executed by [REGIST] button
and [DRUM POS] button. Since, however, the image registra-
tion adjustment must be...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 13 2) Enter 1 with 10-key in the PRINT MODE of set item A, and
press [OK] key.
3) Select the paper feed stage with A3 (or 11 x 17) in it with
PAPER SELECT of set item C, and press [OK] key.
4) Press [EXECUTE] key.
The adjustment patterns (8 pages) are printed.
Each identification number (1 – 8) is printed on each printed
page of 8 adjustment patterns.
5) Check the deflection in 94mm pitch cycle of each C/M/Y print
pattern. Select a print pattern of the smallest...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 14 6) Change the set value of set item A.
When the set value is changed by 1, the dimension is changed
by 0.1mm.
When the set value is increased, the BK image magnification
ratio in the main scanning direction is increased. When the set
value is decreased, the BK image magnification ratio in the
main scanning direction is decreased.
Repeat procedures 2) – 6) until a satisfactory result is obtained.
 
9Image off-center adjustment (Print
engine section)
This adjustment...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 15 6) Select the paper feed mode adjustment item (B – H) to be
adjusted with the scroll key.
7) Change the adjustment value.
Enter the adjustment value and press [OK] or [EXECUTE] key.
When [EXECUTE] key is pressed, the adjustment pattern is
printed.
When the adjustment value is increased, the adjustment pat-
tern is shifted to the front frame side. When it is decreased, the
adjustment pattern is shifted to the rear frame side.
When the set value is changed by 1, the...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 16 MAIN, SUB: The entered value after adjustment is displayed.
( ): Difference from the previous value.
Example: This time 105, previous time 103: 105 (+2)
* In case of an error, ERROR is displayed with the details.
To check the auto adjustment result, use the manual image
registration adjustment mode below.
* Image registration adjustment (Main scanning direction) (Manual
adjustment) (SIM50-20)
* Image registration adjustment (Sub scanning direction) (Manual...