Adj 18] Fax/Scanner Mode Image Loss Adjustment - Sharp AR-BC260 Service Manual

ADJ 17A 3.4 V power voltage adjustment
1) Put the multi-meter on the 3.4V line of the DC main PWB and
GND.
2) Turn VR701 on the DC main PWB to adjust so that the voltage
is 3.4V.
ADJ 17B 5.0 V power voltage adjustment
1) Put the multi-meter on the 5.0V line of the DC main PWB and
GND.
2) Turn VR702 on the DC main PWB to adjust so that the voltage
is 5.0V.
ADJ 18 FAX/scanner mode image loss
adjustment
1) Enter the SIM 50-27 mode.
2) Select the adjustment mode with the scroll key.
Display Content
A FAX MODE image loss
B PUSH SCAN MODE image loss
C PULL SCAN MODE image loss
3) Enter the adjustment value at the selected point with the 10-
key and press the OK key to set the entered adjustment value.
When the adjustment value is changed, the image losses at the
four corners are changed uniformly.
ADJ 19 RSPF scanning position
automatic adjustment
ADJ 19A RSPF scanning position automatic
adjustment
(1) With the RSPF open, put a black background chart
on the table glass.
∗ Kind and size of black background charts
Made with a cutting sheet equivalent to 310 x 470 cutting sheet
No. 791 (Black). (To prevent against erroneous detection due to
disturbance light of the fluorescent lamp, etc.)
(2) Operation
1) Enter SIM 53-8, and select the adjustment [AUTO] mode.
Input procedure:
# – ∗ – C – ∗ – 53 – [START] – 8 – [START]
(Automatic adjustment display)
2) Select [EXECUTE], and the automatic adjustment is started.
(Execution display and end display)
[Note]
• After completion of the RSPF scanning position adjustment,
execute the RSPF document lead edge adjustment SIM50-6
(single, duplex).
• Check to insure that nothing but the black chart is on the table
glass.
• Since the RSPF scanning position automatic adjustment is exe-
cuted at the center in the main scanning direction, the peripheral
sections must be shielded from external lights, etc.
∗ When acquisition of the RSPF scanning position automatic
adjustment value is failed for 3 times and the operation is termi-
nated abnormally, check the following items and try again.
• The peripheral sections must be shielded from external lights
• The back surface of the glass holder Right must be free from
Min. Max.
Default
(How to place the black chart)
Value Value
0 99 20
0 99 30
0 99 0
• Check to insure that the black chart covers the glass holder
Right. (See the figure above.)
• Nothing but the black chart must be place on the OC glass sur-
face.
ADJ 19B
1) Set a scale on the OC table as shown in the figure below.
Note:
AR-BC260 SETTING AND ADJUSTMENTS 8 - 38
of the fluorescent lamp.
dirt. (The boundary of the table glass and the glass holder
Right is detected for operation.)
RSPF image lead edge adjustment
Since the printed copy is used as a test chart for the adjustment,
place the scale in parallel as precisely as possible.