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TROUBLESHOOTING
1) Replace main logic board.
2) Replace printer mechanism.
A
NO
Print head
drive signal waveform is
normal? *3
YES
Replace printer mechanism.
NO
C
NO
1) Replace main logic board.
2) Replace printer mechanism.
NO
NO
1) Replace ink ribbon.
2) Replace printer mechanism.
AA
A
Replace printer mechanism.
Paper feed
motor drive waveform is
normal? *2
YES
Printing operation
is normal?
YES
Paper feed
operation is
normal?
YES
Ribbon feed
operation is
normal?
YES
Self printing terminates.
Check host computer
connection.
Power is off and I/F cable is
connected.
Power is on.
Print program operation
begins from host computer.
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