Pfaff expression 2014 Service Manual page 79

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.
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