T-1 2

3-2. Malfunction Detection Timing and Troubleshooting Proce-

dures

(1) 008: Polygon mirror motor error
<Detection Timing>
<Troubleshooting Procedure>
Description
• The LOCK signal is not detected within a predetermined period of time that begins 1
second after the Polygon Motor has been energized.
• No new LOCK signal is detected for a 1 second period that begins 1.5 seconds after the
first LOCK signal was detected.
• The LOCK signal is not detected for a continuous 0.5 second period in a state during
which the Polygon Motor runs stably.
• The LOCK signal remains ON for a continuous 5 second or longer period during which
the Polygon Motor remains deenergized.
Relevant Electrical Parts
PH Unit Mechanical Control Board (PWB-A)
Step Action Ref. Page
WIRING DIAGRAM
Control Signal Location
(Electrical Parts)
1 Check the cables for connection
and correct as necessary. –– –
2 Replace the PH Unit. ☞ D-19 ––
3 Replace PWB-A. ☞ D-11 ––