3-46
Confidential
■
Downward fogging of solid color
■
Horizontal lines
<User Check>
- Toner may be empty. Replace the toner cartridge with a new one.
Step
Cause
Check
Result
Remedy
1
Toner sensor
failur
Is the toner sensor
performed normally by
following the procedure
in
No
Replace the toner sensor
PCB unit ASSY and the
toner LED PCB ASSY.
2
HVPS PCB
failure
Is the problem solved
after replacing the
HVPS PCB ASSY?
Yes
Replace the HVPS PCB
ASSY.
3
Main PCB failure
Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
<User Check>
- The paper tray ground terminal provided in the machine
body may be dirty. Clean the contact with a dry cloth.
Step
Cause
Check
Result
Remedy
1
Dirt on charged
electrode
Are the electrodes on
the drum unit and
machine body dirty?
Yes
Clean both electrodes.
(Refer to
2
Paper tray
ground terminal
provided in
machine body
Is the paper tray ground
terminal bent, which is
provided in the machine
body?
Yes
Correct bending of paper
tray ground terminal.
3
Laser unit failure
Is the problem solved
after replacing the laser
unit?
Yes
Replace the laser unit.
Summary of Contents for HL 5370DW
Page 12: ...CHAPTER 1 SPECIFICATIONS ...
Page 32: ...Confidential CHAPTER 2 THEORY OF OPERATION ...
Page 57: ...Confidential CHAPTER 3 ERROR INDICATION AND TROUBLESHOOTING ...
Page 109: ...Confidential CHAPTER 4 PERIODIC MAINTENANCE ...
Page 145: ...CHAPTER 5 DISASSEMBLY REASSEMBLY ...
Page 153: ...5 6 Confidential Fig 5 3 EM D110 4 places Separation pad ASSY ...
Page 154: ...5 7 Confidential 5 GEAR LAYOUT DRAWING Fig 5 4 ...
Page 213: ...5 66 Confidential 3 Remove the Gear 17 black Fig 5 86 4 Remove the Gear 17 white Fig 5 87 ...
Page 261: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...