Brother HL-L5000D Service Manual page 89

 Error code 7602
When printing from the paper tray 4, the registration front sensor or the T2/T3/T4TT jam
sensor does not detect paper pass within the specified time after the T4(LT or TT) paper feed
sensor detected paper pass.
<User Check>
• Remove the jammed paper.
• Add the paper properly using the paper tray 4 paper guide.
• Install the latest main firmware.
Step
Foreign object in the front of the
1
machine
Registration front actuator
2
attachment failure
T2/T3/T4TT jam sensor
3
attachment failure
Connection failure of the
4 registration front/rear sensor
harness
Connection failure of the T2/T3/
5
T4TT jam sensor harness
Connection failure of the TT
6
control PCB harness
Connection failure of the T2/T3/
7
T4LT control PCB harness
Connection failure of the T2/T3/
8
T4LT release clutch harness
Connection failure of the T3/
9
T4TT release clutch harness
T2/T3/T4LT release clutch
10
failure
11 T3/T4TT release clutch failure
Registration front/rear sensor
12
PCB failure
T2/T3/T4TT jam sensor PCB
13
failure
14 TT control PCB failure
15 T2/T3/T4LT control PCB failure Replace the T2/T3/T4LT control PCB ASSY.
High-voltage power supply PCB
16
failure
Damaged gears in the paper
17
feeding system
Damaged gears in an LT paper
18
feeding system
Damaged gears in the TT paper
19
feeding system
20 Main PCB failure
Cause
Remove the foreign object.
Reattach the registration front actuator.
Reattach the T2/T3/T4TT jam sensor.
Reconnect the registration front/rear sensor
harness.
Reconnect the T2/T3/T4TT jam sensor
harness.
Reconnect the TT control PCB harness.
Reconnect the T2/T3/T4LT control PCB
harness.
Reconnect the T2/T3/T4LT release clutch
harness.
Reconnect the T3/T4TT release clutch
harness.
Replace the T2/T3/T4LT release clutch.
Replace the T3/T4TT release clutch.
Replace the registration front/rear sensor PCB.
Replace the T2/T3/T4TT jam sensor PCB
ASSY.
Replace the TT control PCB ASSY.
Replace the high-voltage power supply PCB
ASSY.
Replace the main frame L ASSY.
Replace the LT.
Replace the TT.
Replace the main PCB ASSY.
2-63
Remedy
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