Chapter 5 Trouble-Shooting; Procedure For Repair - Citizen iDP-3210 Service Manual

Chapter 5 Trouble-Shooting

5.1 Procedure for Repair

If a failure occurs, observe the cause of the failure carefully,
locate the point of the failure, and repair it following the prescribed procedures.
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Problem : Seek the cause of the failure from items in this column.
If the problem falls into plural items, check all the matters in such items.
By so doing, hidden causes of the failure may be located.
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Cause : Possible causes are listed as many as possible. Assume possible causes, and specify the cause
by methods shown in the next column.
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Check Method : Check methods for specifying failures are mentioned.
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Repair Method : Repair the failure according to methods mentioned in the following column.
Following the above-mentioned procedure assures effective trouble-shooting with little misjudgment.
5.2 Guide to repair
Phenomenon
Poor print
No print or print
result is not clear
Missing dot
Print result is very
dirty.
Poor print quality
CITIZEN
Cause
Poor power supply.
Poor installation and
connection of thermal head
Poor installation of control
board.
Poor installation of platen
roller.
Defect of thermal head
unit.
Foreign matters are
deposed on thermal head.
Defect of thermal head
unit.
Poor power supply.
Dirt is stuck on thermal
head.
Poor paper.
20/46
Check method
Check if specified AC
adapter is used.
Check condition of
installation and connection
of thermal head and
control board.
Check installation of
control board.
Check condition of
installation of platen roller.
Check head SP for
deformation and bent.
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Check head for foreign
matters stuck on it.
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Check if specified AC
adapter is used.
Check thermal head for
stuck dirt.
Confirm that the paper
meets specifications is used. specifications.
iDP-3210 Service Manual
Repair method
Use specified AC adapter.
Connect thermal head
to control board correctly.
Install control board
correctly.
Install platen roller
correctly. Replace
deformed thermal head
unit.
Replace thermal head
unit.
Wipe foreign matter off
with a cotton or soft cloth
soaked in ethyl alcohol.
Replace thermal head unit.
Use specified AC adapter.
Wipe foreign matter off
with a cotton or soft cloth
soaked in ethyl alcohol.
Use paper to meet