Oki MICROLINE 80 Maintenance Manual page 71

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Carriage vibrates when power is switched on.
YES
YES
YES
YES
YES
Check synchro-belt
tension.
TRI is faulty.
Switch power off, move
carriage to right and
left by hand to see
if it isn't hard.
Check +24
v.
Check space motor
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______ -; drivers.
Rea.Jjust.
Replace
circuit board.
Check feed
mechanism.
Replace
circuit board.
Replace
circuit board.
69