Service manual

CBM-270 Service Manual
14 CITIZEN
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Phenomenon Cause Check Method Repair Method
The AC adapter is not
connected.
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Connect the specified
AC adapter.
Check whether or not
the non-specified
power supply was used
in the past.
Use the specified AC
adapter.
The fuse is gone.
Check whether or not
the specified fuse is
used.
Use the specified fuse.
Check whether or not
the specified power
supply is used.
Use the specified AC
adapter.
The power cannot be
turned on.(POWER
lamp not illuminated)
Others
Check whether or not
the cable or connector
of the operation panel
board is connected.
Replace the cable of
the operation panel
board. Connect the
connector.
The power is turned on
by disconnecting the
cable of the printer
mechanism.
(Does not operate)
Replace the printer
mechanism.
The fuse blows out
immediately if
replaced. It blows out
during operation.
(F1 blows out)
The printer
mechanism or control
board is defective.
The phenomenon
remains unchanged
after the above-
mentioned check.
Replace the control
board.
Measure a circuit
voltage with a
voltmeter, and it is
normal.
Replace the control
board.
The voltage is higher. Replace Tr1, ZD2, or a
peripheral circuit part.
Ditto (F2 blows out) The control circuit is
corrupt. The voltage
is abnormal.
The voltage is lower. Replace the control
board.
The power is turned on
by disconnecting the
motor cable.
(Does not operate)
Replace the printer
mechanism.
Ditto (F3 blows out) The motor or driver of
the printer mechanism
is defective.
The phenomenon
remains unchanged
after the above-
mentioned check.
Replace the motor
driver or control board.
*
If the fuse is gone while using the specified AC adapter, it is likely that the printer mechanism or
control board is defective. Replace either of them. Also, check the wiring of the interface.