Canon LBP-800 Manual Do Serviço
V. MALFUNCTION TROUBLESHOOTING
Perform troubleshooting according to the malfunction diagnosis flowchart (Figure 4-1-1). If an
“malfunction” is found, the defective part must be located and rectified by the following proce-
dure.
“malfunction” is found, the defective part must be located and rectified by the following proce-
dure.
V-1.
No AC power
<Possible causes>
1) Blown fuse (FU101)
1) Blown fuse (FU101)
Action: Refering to page 3-22 in Chapter 3, replace the fuse (FU101).
2) Defective engine controller PCB
Action: Replace the engine controller PCB.
V-2.
No DC power
<Possible causes>
1) No AC power is supplied.
1) No AC power is supplied.
Action: Make a check according to 5-1 “No AC power”.
2) Overcurrent/overvoltage detection circuit activated
Action: If the problem is not rectified after the power switch is turned OFF and then ON
again, find the cause of activation of the overcurrent/overvoltage detection circuit
in the power supply unit. Wait for two minutes or more before turning the power
back ON.
in the power supply unit. Wait for two minutes or more before turning the power
back ON.
3) Blown fuse (FU102)
Action: Refering to page 3-22 in Chapter 3, replace the fuse (FU102).
4) Defective engine controller PCB
Action: Replace the engine controller PCB.
CHAPTER 4
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