Brother 884-B20 Owner's Manual page 30

Trouble
7. Knife does not cut fabric
8. Thread not passing
through eye of needle
9. Looper not threaded
10. Machine not operating
28
Cause
1. Blade worn
2. Knife lock lever set to lock
knife
1. Incorrect threading position
2. Improper threading
3. Needle threader change switch
incorrectly set
4. Needles incorrectly installed
1. Pipes not joined
2. Not enough thread inserted
into looper thread insertion
hole
3. No excess thread before
inserting into looper thread
insertion hole
4. Thread caught somewhere
5. Lint accumulated in pipe
6. Thread (such as woolly nylon
thread and thick thread) used
is difficult to insert into looper
thread insertion hole
1. Machine not turned on
2. Power supply plug not inserted
into power outlet
3. Presser foot lifting lever raised Lower the presser foot lifting lever.
4. Material plate cover, front
cover, or both open
Remedy
Replace the knife with a new one.
Contact your authorized Brother dealer.
Move the knife lock lever to unlock the
knife.
(See page 8.)
Correctly position the mark on the
handwheel.
(See page 6.)
Thread correctly. (See pages 14 - 19.)
Set the needle threader change switch
correctly.
(See pages 18 - 19.)
Install needles correctly.
(See page 12.)
Move the air threading switching lever,
and then turn the handwheel toward you
until the pipes become joined.
(See page 14.)
Insert 1 to 2cm (1/2 inch) of thread into
the looper thread insertion hole.
(See page 15.)
Leave 30 to 40 cm (12 to 16 inches) of
excess thread before inserting it into the
looper thread insertion hole.
(See page 15.)
Release the thread from where it is
caught.
Using the included threading wire, thread
the looper to remove the lint from the
pipe.
(See page 29.)
Thread using the threading wire or the
spun thread.
(See pages 16 - 17.)
Turn on the machine.
(See page 6.)
Insert the power supply plug into a power
outlet.
(See page 6.)
(See page 7.)
Check for open covers, and then close
them.
(See pages 6 and 29.)