Printer System: Blank Or Black Prints - NEC NEFAX 671 Service Manual

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Printer system: Blank or black prints

4011T035AA
<Troubleshooting Procedures>
Step Check
1 Is a printed page blank?
2 Is the coupling of the drive mechanism of
the Imaging Cartridge properly connected?
3 Is the drum charge voltage contact point or
PC Drum ground contact point of the Imag-
ing Cartridge properly connected?
4 Is the High Voltage Unit (HV1) connector
connected properly?
5 Is the problem eliminated when step 4 was
checked?
<Typical Faulty Images>
Result
YES Check PH Unit connectors for
NO
NO
NO
NO
T-33
4011T036AA
Action
proper connection.
Check coupling of drive
mechanism for connection
and correct as necessary, or
replace Imaging Cartridge
(Drum Cartridge, Toner Car-
tridge).
Check, clean, or correct con-
tact point.
Connect it properly.
Replace High Voltage Unit
(HV1).
Replace Controller/Mechani-
cal Control Board (PWB-P).
Replace PH Unit.