Brother DA-927A, Инструкция по эксплуатации

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10. TROUBLESHOOTING
26
DA-927A, DA-928A
Problem Cause Remedy Page
4. Machine does not feed
work.
The feed dog is too low. Adjust the feed dog height.
22
The presser foot pressure is too small. Adjust the presser foot pressure.
14
The feed dog is worn out. Have serviceman check it. －
The presser foot floats and does not fully
press work.
Have serviceman check it.
－
The feed dog and presser foot work on
one side only.
Have serviceman check it. －
5. Upper and lower
threads are breaking.
The needle is bent or the needle tip is
broken.
Replace the needle
. 11
The needle is not properly installed. Install the needle correctly.
11
The needle is not properly threaded. Thread the needle correctly.
12
The upper or lower thread tension is too
weak or too strong. Adjust the upper thread or lower thread
tension.
14
The needle holes are too small for
threads.
Check the needle and thread counts.
11
The loopers are damaged.
Smooth the loopers with an oiled
grindstone or replace the damaged parts.
20
6. Broken needles
The material is being pushed or pulled
with excessive force during sewing. Do not push or pull the material with
excessive force.
－
The needle is not properly installed. Install the needle correctly.
11
The needle tip is bent.
Replace the needle
. 11
The needle tip is broken, or the needle
hole is blocked.
Replace the needle
. 11
Needles hit the loopers.
Adjust the timing of the loopers running
clear of the needles.
18
The needle holes are too small for
threads.
Check the needle and thread counts.
11
CAUTION:
・ It is extremely dangerous to leave any pieces of broken needle sticking in the material. If the
needle breaks, search for all pieces until the whole of the needle is found again.
・ Furthermore, we recommend that thorough steps be taken to account for such needles to comply
with product liability regulations.
1542B
1543B