Citizen iDP3550 - Troubleshooting Guide

iDP3550/3551 Service Manual
12 CITIZEN
4.2 Troubleshooting Guide
• Power Supply Failure
Phenomenon Cause Check Method Remedy
The AC cord is not
connected.
Connect the AC cord to the
AC outlet.
Not connected to the
terminal block (For
AC230V only)
Connect to the terminal
block.
Check whether any
unspecified power has been
used so far.
Use the specified AC
voltage.
No power
(POWER lamp not
illuminated)
The fuse is gone.
Check whether the
specified fuse is used.
Use the specified fuse.
The power is normally
supplied when the cable
is disconnected from the
printer mechanism. (No
operation is done.)
Replace the printer
mechanism.
The power is normally
supplied when the cable of
the power PCB assy is
disconnected from the
control PCB assy.
Replace the control PCB
assy.
The printer mechanism,
control PCB assy, or power
PCB assy is defective.
The phenomenon does not
change after the
above-mentioned check.
Replace the power PCB
assy.
The fuse immediately
goes again after
replacing with new on.
The printer mechanism or
circuit drive power is
abnormal.
With a DC voltmeter,
measure the mechanism
drive voltage and circuit
drive voltage.
Replace the power PCB
assy.
* If the fuse is gone with the specified AC voltage supplied, it is likely that the printer mechanism, control PCB
assy, or power PCB assy is defective. Replace either defective one. Incidentally, check the wiring of the
drawer and interface cable.