Brother HL 5030 - B/W Laser Printer Service Manual page 220

CHAPTER 6 TROUBLESHOOTING
I-19 Hollow print
Possible cause
Print paper
I-20
Possible cause
Toner cartridge
failure
High-voltage
power supply
PCB failure
User Check
(1) Check the paper used meets the recommended paper specifications.
(2) Select the 'Thick paper mode' in the printer driver, or use thinner paper than you
are currently using.
(3) Check the printer's environment, conditions such as high humidity may cause
this situation to occur.
Step
1 Is thick paper of more than
43lb being used or extremely
rough surface paper?
Downward fogging of solid black
Step
1 Is the problem solved after
replacing the toner cartridge?
2 Is the problem solved after
replacing the high-voltage
power supply PCB?
Check Result
Check Result
6-40
Remedy
Yes Recommend to use the
specified types of paper.
No Refer and compare with I-15.
Remedy
Yes Replace the toner cartridge.
Yes Replace the high-voltage power
supply PCB.