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Fitting:
● Mount the control board with keys onto the circuit board whilst making sure that all four lugs 116, 117,
119 and 120 lock in completely behind the circuit board (fig. 90).
● Mount the facing panel onto the front housing panel and make sure that both lugs 1 lock fully into place
(fig. 91).
● Attach the housing insert and secure with both torx screws.
● Attach the folding cover.
● Carry out a functional test for all keys.
● After a running-in time of 10 - 15 min. check the adjustment of equal forward and reverse stitch length
according to section 21 of this service manual.
● Carry out an electrical safety test in accordance with VDE 0701 using testing appliance
Metrawatt 5013.
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