Brother HE-800A Service Manual page 87

Fig. A
Fig. B
Pulled forward
Fig. C
Presser foot lifter pulse motor and feed pulse motor
home position (sewing start position)
When the stop plate (2) of the upper thread trimmer
lever (1) is pulled forward from the position in figure A,
the upper thread trimmer assembly (3) moves in the
direction of the arrow a and goes below the projection
of the opening cam (4).
Then when the feed mechanism is operated (arrow c),
the upper thread trimmer assembly (3) is forced to go
behind the opening cam (4). Depending on the case,
the rising section (6) of scissors M (5) goes into the
hollow shown in the figure and the feed mechanism
cannot then operate. At this time, when feed
mechanism home positioning is carried out, the feed
pulse motor goes out of step.
* Operate the feed mechanism when the condition is
as shown in figure A.
* If it is pushed in the direction of arrow b at the
condition shown in figure B, the condition will
change to that shown in figure A.
HE-800A
4. ADJUSTMENT
4282Q
79