103
1st replacement pt.
Fault
2nd replacement pt. 4th replacement pt.
3rd replacement pt. 5th replacement pt.
45. Fault table for electrical parts 2044
mains lead
Machine is switched on, but
does not run when foot con-
troll is actuated.
foot control upper circuit board power pack/
(base plate)
motor
foot control
Machines runs continuously
onits own after a brief switch-
on time.
power pack/
(base plate)
upper circuit board
upper circuit board
Figures do not light up or
flicker on display field
power pack/
(base plate)
base circuit board/
upper circuit board
Zigzag stepping motor runs
continuously or needle bar
moves continuously to and fro
zigzag stepping motor synchronizerkeyboard
base circuit board/
upper circuit board
Feed stepping motor runs
continuously or the feed dog
moves continuously to and fro
feed stepping motor synchronizerkeyboard
upper circuit board
Machine starts running at top
speed, then stops again.
Exchange synchronizer
and then adjust
power pack
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