Muratec MFX-C4000 Field Engineering Manual page 212

Alignment & Troubleshooting
5) Toner Supply Error
Description : The poor supply of toner in the printing job.
[ Wrong Part ]
1. Auger rotation
2. Toner supply DC motor
Check the toner supply error.
YES, the rotation of auger is not good.
The state of rotation of
Replace the toner cartridge.
auger in the toner
cartridge.
NO
Is the toner supply
motor normal?
NO(abnormal)
Replace the toner supply motor.
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Service Manual