3-28
Confidential
■
NEW TONER IS NOT DETECTED
■
LED FAILURE
■
LCD failure
■
PRINTER STOPS WHILE IDLING
Idling: To keep the toner evenly without one-sided. When turn the power ON or start the
printing, Turn the exposure drum or develop roller before stating the printing.
Step
Cause
Remedy
1
New toner actuator catching on
some position
Re-assemble the new toner actuator.
2
New toner actuator spring loose
Re-assemble the new toner actuator
spring.
3
New toner sensor PCB ASSY
harness connection failure
Check the sensor performance following
the procedure in
in 1.3 Service Mode in Chapter 7
If any problem occurs, check the harness
connection of the new toner sensor PCB
ASSY, then reconnect it.
4
New toner actuator failure
Replace the new toner actuator.
5
New toner sensor PCB ASSY
failure
Replace the new toner sensor PCB ASSY.
6
Main PCB ASSY failure
Replace the main PCB ASSY.
Step
Cause
Remedy
1
Panel PCB harness connection
failure
Check the harness connection of the panel
PCB, then reconnect it.
2
Panel PCB failure
Replace the panel PCB.
3
Main PCB ASSY failure
Replace the main PCB ASSY.
Step
Cause
Remedy
1
Panel PCB harness connection
failure
Check the harness connection of the panel
PCB, then reconnect it.
2
LCD harness connection failure
Check the harness connection of the LCD,
then reconnect it.
3
Panel PCB failure
Replace the panel PCB.
4
Main PCB ASSY failure
Replace the main PCB ASSY.
Step
Cause
Remedy
1
Front cover is opened
Replace the front cover.
2
Process unit electrode dirty
Clean the electrodes on the process unit.
(Refer to
3
Main PCB ASSY failure
Replace the main PCB ASSY.
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 ...