Ricoh B264 Service Manual page 233

329 D LD unit beam pitch adjusted incorrectly
The LD unit HP sensor does not detect
the ON condition while changing the LD
unit position for correcting the LD
position or changing the dpi.
335 D Polygon motor error 1: On timeout
The XSCRDY signal did not go LOW
(Active) within 10 sec. after the polygon
motor was turned on.
336 D Polygon motor error 2: Off timeout
The XSCRDY signal did not go HIGH
(Inactive) within 3 sec. after the polygon
motor was turned off.
337 D Polygon motor error 3: XSCRDY signal
error
The XSCRDY signal did not go HIGH
(Inactive) after the polygon motor had
been rotating normally for 200 ms.
338 D Polygonal Mirror Motor Error 4:
Unstable Timeout
The XSCRDY signal is detected LOW)
(Active) after the polygonal mirror motor
switches on, but the signal is not
detected LOW after 1 s has elapsed,
and not detected after another 500 ms
has elapsed.
350 D ID sensor pattern test error
One of the following ID sensor output
voltages was detected twice
consecutively when checking the ID
sensor pattern.
1) Vsp ≥ 2.5V
2) Vsg ≤ 2.5V
3) Vsp = 0V
4) Vsg = 0V
351 D ID sensor Vsg test error
When the ID sensor was checked, the
ID sensor output voltage was 5.0V
while the PWM signal input to the ID
sensor was 0.
SM
SERVICE CALL CONDITIONS
• After initialization of the SP modes,
SP2-109-3 or SP2-109-4 was not
executed.
• The harness is blocking the LD drive
(PCB), preventing adjustment of the
pitch.
• Polygon motor drive board I/F
harness loose, disconnected, or
damaged
• Polygon motor drive board defective
• Polygon motor defective
• Polygon motor drive board I/F
harness loose, disconnected, or
damaged
• Polygon motor drive board defective
• Polygon motor defective
• Polygon motor drive board I/F
harness loose, disconnected, or
damaged
• Polygon motor drive board defective
• Polygon motor defective
• I/F harness of the polygonal mirror
motor disconnected or defective.
• Polygonal mirror motor or polygonal
mirror motor driver defective.
• Polygonal mirror motor drive pulse is
not output incorrectly.
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• I/O board (IOB) defective
• High voltage supply board defective
• ID sensor dirty
• Defect at ID sensor pattern writing
area of the drum
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connection
• I/O board (IOB) defective
• Scanning system defective
• High voltage supply board defective
• ID sensor dirty
• Defect at the ID sensor pattern
writing area of the drum
4-5 B264/B265