Xerox WorkCentre Pro 412 Service Manual page 183

PROBLEM
Abnormal noise
7-3-2 PC-Scan
PROBLEM
Scanning error
Defective image
quality
Abnormal noise
WorkCentre Pro 412, FaxCentre F12 &
WorkCentre M15/M15i
ITEMS TO BE CHECKED.
• Check the scanner glass and any
mechanical disturbance.
• Check the motor driver in Driver
PBA.
ITEMS TO BE CHECKED.
• Check the printer cable.
• Check how TWAIN driver is
installed.
• Check harness contact.
• Check the IEEE1284 signal level.
• Check shading profile.
• Check the gap between original
and scanner glass.
• Check the scanner glass and any
mechanical disturbance.
• Check the motor driver in Driver
PBA.
3/03
Maintenance & Troubleshooting
HOW TO SOLVE
• Check the scanner glass is cor-
rectly located and clean, check that
the CCD carriage moves smoothly.
• If any driver is defective, replace
the main PBA.
- U55 or U55-1, 15 = 0V to 24V
swing signal when operating.
HOW TO SOLVE
• Check correct installation, and use
standard IEEE1284 cable.
• Remove any other scanner driver.
• Reboot after reinstallation of the
TWAIN driver.
• Check CN14 contact in Main PBA
• If any signal level is defective,
install a new Main PBA.
- U36-66~74 in Main PBA = 0.8V to
2.4V TTL signal.
• If necessary, install a new PBA
MAIN-MAIN, PL 8-1 item 19
• Remake shading profile in the Tech
mode.
• A gap greater than 0.5mm can
cause a blurred image.
• Check the scanner glass is cor-
rectly located and clean, check that
the CCD carriage moves smoothly.
• If any driver is defective, replace
the Main PBA.
- U55 or U56-19 = 0V to 24V swing
signal when operating.
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