Citizen CBM-270 Service Manual page 14

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