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8. Trouble Shooting Flow Chart
Note: Before tracing the problem, make sure the Printer is in good operating condition.
START
Does the
NO
main unit work?
|
YES
Do the
DTR and TXD work
properly?
NO
YES
Is
the mode setting
correct?
NO
YES
4s
the +12,-13V
correct?
NO
YES
Is
the OSC
normal?
NO
YES
Check the
main unit.
Check CP102
Check IC 101
Check IC 102
Check the
DIP switch
setting.
Check the
+12,-13V
Power Circuit.
Check x1
20
normal?
YES
Is
IC106
normal?
YES
normal?
YES
is
IC 108
normal?
YES
is
IC109
normal?
normal?
YES
Check the
main unit.
NO
NO
NO
NO
NO
NO
Replace IC 105
Replace IC 106
Replace IC 107
Replace IC 108
Replace IC 109
Replace 1C 101
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