FS-6020
1-5-5
(1-3) Error code 4200 [E3] (laser output error)
Detection conditions
• The pin photo signal (PDN) is not output within a specified time after the polygon motor ready signal (MOTRDYN)
becomes ready (L level).
Corrective measures
Is there any damage
to the harness (S02820)
between the main PWB and the PD
PWB or improper connection at the
YC11 connector on the main
PWB?
If any problem is found on the
harness or the connector,
repair or replace it.
Replace the laser scanner
unit. (See page 1-6-15.)
Replace the laser scanner
unit. (See page 1-6-15.)
End
Ye s
Ye s
No
No
OK?
OK?
OK?
Replace the laser scanner
unit. (See page 1-6-15.)
End
No
Replace the laser scanner unit
and the main PWB at the same
time. (See pages 1-6-15 and
25.) If the error is not cleared,
replace the engine/high voltage
PWB. (See page 1-6-26.)
End
Replace the main PWB. (See
page 1-6-25.)
Ye s
Ye s
Ye s
No
No
Start
Turn on the printer, connect a tester
or an oscilloscope, and measure as
follows.
Is the voltage at
the following pins of the
main PWB 5 V DC in the printer
standby mode?
Pin No. 6 of the YC10 connector
Pin No. 1 of the YC11
connector
* Possible defective locations
(causes)
• Main PWB
• Laser scanner unit
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