Brother Model KH--830 Service Manual page 58

Trouble.
Cause
Remedy Note
Unnecessary needles stick I. Too much vertical carriage play. I. Replace front or rear legs of carriage.
out irregularly.
(Front or rear legs of carriage have
worn)
Abnormal if difference exceeds
0.5
mm.
2. The holes on the needle bed lower 2 . Replace needle bed.
plate has worn .
Particular needles come I . Oil has got between needle selec- J. Wipe off the oil.
out from 8 postilion to
tor plates.
D position.
2. Bent needle. 2. Replace the needle.
See Instruction manual.
3. Too much vertical carriage play. 3. Replace front or rear legs of carriage.
4. The holes on the needle bed lower
4. Replace needle bed.
plate has worn.
No needle selection in
!
I . Poorly adjusted card feed.
1 . Adjust card feed
l~er.
24th cycle.
I
(Card hole and card reader are not !
in position.)
2. Card reader holder plate has got 2. Adjust the gap to
the
normal level
out of position, reducing the gap of0.6mm.
between card roUer and caid guide.
3. Card reader fails to make regular 3. Replace needle selector unit.
vertical motion.
4. Poor adjustment of card reader 4. Adjust card reader guide position.
pi de.
5. Poor adjustment of rotary cam
5. Adjust needle selector plate position.
(Needs a Uttle shift to left).
Insufficient travel of needle selec.
tor plate.
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