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Fitting:
● Attach the circuit board complete with key pair panel 122 and the keys onto the front housing panel
(fig. 95).
● Secure the circuit board with the five fastening screws 121 (Fig. 94).
● Mount connection plug 113 on the circuit board on the front housing panel (fig. 95).
● Fit the complete housing according to the service manual.
● 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.