JUKI MOL-254 Engineer's Manual page 155

1. Break down the thread take-up spring portion of the thread tension asm. and replace thread take-up spring
adjusting plates (A)
At this time, all the adjustment values of the thread take-up spring stroke and the spring tension become
ineffective. So, it is recommended to record the adjustment values in advance.
2. When replacing the thread take-up spring adjusting plates (A) and (B) with those for thread breakage detector
and fixing those for thread breakage detector, fix plain washer
3. Connect the cable terminals referring to the figure on the left.
Black : Ground
Red : 1st thread
White : 2nd thread
4. Fixing the cable on the machine head, pass it through the duct under the machine table and insert it into the
connector of CN16 on the MAIN circuit board of the control box. (See 180 page.)
5. Turn ON the upper DIP SW No. 3 located on the right side of the operation box panel.
6. When all installing works have been completed, check the operation.
and (B) with those for thread breakge detector.
for insulation without fail.
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