Introduction
This Engineer’s Manual is for technical service engineers. In the instruction manual for the maintenance engi-
neers of sewing machines and sewing workers in a sewing factory, how to operate a sewing machine is also
described in detail. However, in this manual, [Adjustment Procedure], [Results of Value Change for Adjustment],
and the roles of each component are described: these are not included in the instruction manual.
When maintenance is performed for our sewing machines, refer not only to this manual, but also to the instruction
manual and parts list.
This engineer’s manual describes the basic adjusting values as the reference values in the first page, and the
observed events caused by sewing and mechanical faults as the [Results of Value Change for Adjustment] and
[Adjustment Procedure] in the second page.
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General
