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-
dures.
V-1.
No AC power
<Possible causes>
1) Blown fuse (FU101)
Action:
Replace the fuse (FU101).
2) The engine controller PCB is defective.
Action:
Replace the engine controller PCB.
V-2.
No DC power
<Possible causes>
1) No AC power is supplied.
Action:
Make a check according to V -1 “No AC power”.
2) The overcurrent/overvoltage detection circuit is activated.
Action:
Unplug the power cord, wait for two minutes or more, and then plug the cord back.
If the problem still remains, find the cause of activation of the overcurrent/over-
voltage detection circuit in the power supply unit.
3) Blown fuse (FU102)
Action:
Replace the fuse (FU102).
4) The engine controller PCB is defective.
Action:
Replace the engine controller PCB.
CHAPTER 4
4 - 16
Summary of Contents for LASER SHOT LBP-1210
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