Read Sharp AR-M550 (serv.man14) Service Manual online
AR-M550/M620 SETTING AND ADJUSTMENTS 7 - 2
Note: Adjusting the output voltage requires the ability to measure
internal impedance of 1000 MW.
This adjustment is needed in the following situations:
• The high voltage power PWB (MC/DV/TC) has been replaced.
• U2 trouble has occurred.
• The PCU PWB has been replaced.
• The EEPROM of the PCU PWB has been replaced.
(Main charger grid voltage adjustment)
1) Remove the rear cover of the machine.
2) Apply a digital multi-meter to the connector CN2 pin (7) of the high
voltage PWB and the chassis GND.
ADJ11
Adjusting the image quality in scan mode
ADJ 11A
Adjust the scan mode image density for all modes at once
46-21
ADJ 11B
Scan mode image density adjustment/individual setup
(standard mode)
(standard mode)
46-21, 46-22
ADJ 11C
Scan mode image density adjustment/individual setup
(small-character mode)
(small-character mode)
ADJ 11D
Scan mode image density adjustment/individual setup
(fine mode)
(fine mode)
ADJ 11E
Scan mode image density adjustment/individual setup
(super fine mode)
(super fine mode)
ADJ 11F
Adjust the image gamma in scanner mode
46-27
ADJ12
Common image quality adjustments for all of
copy, scan, and fax modes
copy, scan, and fax modes
ADJ 12A
Correct the image density in original table mode/SPF
mode
mode
46-20
ADJ 12B
Set up the auto mode operation for copy, scan, and fax
46-19
ADJ 12C
Adjust the shading reference value (gain adjustment)
46-17
ADJ13
Adjusting the fusing paper guide position
ADJ 14
Adjusting the paper size detection
ADJ 14A
Adjust the paper width sensor for the manual paper feed
tray
tray
40-2
ADJ 14B
Adjust the paper width sensor for paper feed tray 3
40-12
ADJ 14C
Adjust the paper width sensor for the SPF paper feed tray
53-6
ADJ 15
Adjusting the original size detection (in original
table mode)
table mode)
ADJ 15A
Adjust the detection point of the original size sensor (in
original table mode)
original table mode)
ADJ 15B
Adjust the sensitivity of the original size sensor
ADJ16
Adjusting the touch panel coordinates
65-1
ADJ17
Adjusting the supply voltage
Job No
Adjustment item list
Simulation
ADJ 1
Adjusting high voltage values
ADJ 1A
Adjust the main charger grid voltage
Item/operation mode
Simulation
High voltage power PWB (MC/DV/TC)
Setting
range
Default
Adjustment voltage
(monitor voltage)
Connector
Pin #
Actual
voltage
Copy
Auto mode
8-2
AUTO
200 – 1000
580
–620±5v
CN2
3
–590±5v
Text mode
CHARACTER
200 – 1000
580
–620±5v
CN2
3
–590±5v
Text/photo mode
MIX
200 – 1000
580
–620±5v
CN2
3
–590±5v
Photo mode
PHOTO
200 – 1000
580
–620±5v
CN2
3
–590±5v
Printer
All modes
PRINTER
200 – 1000
580
–620±5v
CN2
3
–590±5v
FAX
All modes
FAX
200 – 1000
580
–620±5v
CN2
3
–590±5v
CN2
3
Click on the first or last page to see other AR-M550 (serv.man14) service manuals if exist.