Ricoh A-P4, Service Manual

Page: 150 / 381

The LD unit home position sensor did not
detect the ON condition when the LD unit
moved to its home position.
• LD unit home position sensor defective
• LD positioning motor connector or har-
ness loose, broken, defective
• LD unit or LD unit motor blocked
• LD unit motor defective
328 D
LD unit home position error 2 • LD unit HP sensor/harness defective
• LD unit home position sensor defective
• LD positioning motor connector or har-
ness loose, broken, defective
• LD unit or LD unit motor blocked
• LD unit motor defective
The LD unit home position sensor did not
detect the OFF condition when the LD unit
moved from its home position.
329 D
LD unit beam pitch adjusted in-
correctly • After initialization of the SP modes, SP2-109-3 or
SP2-109-4 did not execute.
• If this SC code appears at power on or during a
print job, do these two SP codes then turn the main
power off/on.
• If executing these two SP codes does not solve the
problem, check the LD unit drive mechanism (the
harness of the LD board or other object could be
blocking the LD drive mechanism, preventing ad-
justment of the pitch).
• Do SP 5801, then do SP2109 3 and SP2109 4
again.
The LD unit HP sensor did not
detect the ON condition while
changing the LD unit position
to correct the LD position or
change the resolution (dpi).
335 D
Polygon motor error 1: On timeout • Polygon motor drive board I/F har-
ness loose, disconnected, or dam-
aged
• Polygon motor drive board defective
• Polygon motor defective
The XSCRDY signal did not go LOW (Ac-
tive) within 10 sec. after the polygon motor
was turned on.
336 D
Polygon motor error 2: Off timeout
• Polygon motor drive board I/F har-
ness loose, disconnected, or dam-
aged
• Polygon motor drive board defective
The XSCRDY signal did not go HIGH (In-
active) within 3 sec. after the polygon motor
was turned off.
Service Call Conditions
149
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