C1200: Asic Memory Abnormal; C1300: Polygon Mirror Motor Error - NEC NEFAX 671 Service Manual

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C1200: ASIC memory abnormal

<Detection Timing>
• An error occurred while writing to or reading the SRAM on the Control Board (PWB-C).
<Troubleshooting Procedures>
Controller/Mechanical Control Board (PWB-P)
Step Action
1 Turn this machine off, then on
again.
2 Check the connection of the
memory on the PWB-P, and
then correct it if necessary.
3 Replace PWB-P.
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C1300: Polygon mirror motor error

<Detection Timing>
• The LOCK signal is not detected within a predetermined period of time that begins 1
sec. after the Polygon Motor has been energized.
• No new LOCK signal is detected for a 1-sec. period that begins 1.5 sec. after the first
LOCK signal was detected.
• The LOCK signal is not detected for a continuous 0.5-sec. period in a state in which the
Polygon Motor runs stably.
• The LOCK signal remains ON for a continuous 5-sec. period or more when the Polygon
Motor remains deenergized.
<Troubleshooting Procedures>
PH Unit
Flat cable
Step Action
1 Check cables for connection and
correct as necessary.
2 Replace PH Unit.
3 Replace PWB-P.
Description
Relevant Electrical Components
Ref. Page
Control Signal
–
☞ D-12
☞ D-12
Description
Relevant Electric Parts
Controller/Mechanical Control Board (PWB-P)
Ref. Page
Control Signal
–
☞ D-19
☞ D-12
T-21
WIRING DIAGRAM
Location
(Electric Parts)
– –
– –
– –
WIRING DIAGRAM
Location
(Electric Parts)
– –
– –
– –