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Trouble Cause (1) Cause (2) Checking order and adjusting procedure Page
31. Number of revolution cannot be
increased.
32. Active tension fails to work.
1. Number of revolution fails to react
to the speed variable resistor.
2. Number of revolution is low.
1. Command is not ordered to the
thread tension solenoid.
2. Thread tension solenoid fails to
work.
1. Connection is defective or cable
is defective.
2.Speed variable resistor is
defective.
3. Failure with MAIN circuit board
4. Failure with SDC circuit board
1. Limitation is applied to the number
of revolution.
2. Number of revolution of the
pattern is set to low.
1. Connection is defective or cable
is defective.
2. Set value of the tension is low.
3. Failure with MAIN circuit board
1. Load is heavy.
2.Thread tension solenoid is
defective.
Check the connection of CN17 and CN41.
Replace the operation box.
Replace the MAIN circuit board.
Replace the SDC circuit board.
Change the setting of memory switch.
Change the parameter.
Check the connection of CN22 and CN55.
Change the parameter.
Replace the MAIN circuit board.
Check the assembling.
Check the continuity (13.6Ω ±10%).
Relace the thread tension solenoid in case of breaking of wire or short-
circuit.
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