Oki B 4100 Maintenance Manual page 278

No.
1 Check MCNT Board.
2 Check PWU-HV Board
cover open switch,
cover open switch connection.
Check MCNT Board.
3 Return to Section 7.1.
4
Replace the EP Unit. And clear
Drum Count, Section 6.3.
5 Check installation of MCNT board,
POWER SUPPLY UNIT board.
6 Check MCNT Board.
Check thermister (resistance of about
7
200 kilo ohms at room temperature
and about 140 kilo ohms at high
temperature), POWER SUPPLY
UNIT.
Note: R44 board for OKIFAX 4100/OKIOFFICE44 is shown as MCNT.
40055101TH Rev.4
Table 7.1.22.2 Action Items (Printer Unit-LCD Message)
ACTION ACTION
No.
8 Check connection between the PWU
and the fuser assembly,
heater, thermostat.
9 Check PWU.
Check Sensor-E, magnet-H,
10
hopping roller, pulse motor,
MCNT Board, Action of Idle gear-P.
Check Gear-T,
11
MCNT Board, PWU-HV Board.
Check exit sensor lever,
12
PWU
Check MCNT Board.
13
Check PWU, MCNT board.
14
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