Oki OKIFAX4550 Maintenance Manual page 257

Troubleshooting flow chart 11:
Periodic abnormal printing
1.44" (36.6 mm)
Check the fax control side.
41309401TH Rev.4
Yes
period?
No
Yes
1.98" (50.3 mm)
period?
No
Yes
2.63" (66.8 mm)
period?
No
Yes
0.81" (20.6 mm)
period?
No
Yes
0.81" (20.6 mm)
period?
No
Yes
1.71" (43.4 mm)
period?
No
Yes
2.46" (62.5 mm)
period?
No
Yes
1.98" (50.3 mm)
period?
No
Developing roller (inside EP unit)
failure.
Replace or clean the EP unit.
EP drum (inside EP unit)
failure.
Replace the EP unit.
Tonner supply roller (inside the EP
unit) failure.
Replace the EP unit.
Charging roller (inside the EP unit)
failure.
Replace the EP unit.
Cleaning roller (inside the EP unit )
failure.
Replace the EP unit.
Replace the transfer roller.
Heater roller (inside the fuser unit)
failure.
Replace the fuser unit.
Replace the Back-up roller.
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