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BAS-311E.311EL.326E.326EL
Chapter 7
#17
The
machine
does not
stop with
the needle
at the upper
position.
#18
The
machine
can not
sew
patterns as
pro-
grammed.
#19
The
operation
will not stop
if the
emergency
stop switch
is pressed.
#20
The thread
trimmer
does not
operate
after the
emergency
stop switch
is canceled.
#21
The STEP
BACK
switch is
inoperative.
#22
Sewing is
not
resumed.
#23
Programmi
ng can not
be made.
Probable causes
1. The synchronizer is not properly
adjusted.
2. Control circuit board defective
1. EM switch defective.
1. Panel circuit board defective
1. The programmer connector and
its cable are defective.
2. The programmer is defective.
3. Panel circuit, board defective
Check/repair/adjust
• If the needle stop position varies at random every
time the machine operation is complete, adjust
the needle stop position to the upper position.
• Refer to #8-1, 2, 3, 4.
• Remove connector P3 (HEAD) on the control
circuit board, and check the continuity on the
cord.
Between pins 1 and 2:
0 Ω normally or ∞ Ω when the emergency
stop switch is pressed.
Between pins 2 and 3: ∞ Ωnormally or 0 Ω
when the emergency stop switch is pressed.
• Refer to #16, #17
• Refer to #1 and #2 (panel switch).
• Refer to #8-1, 2, 3, 4 and #13, #14.
• Remove connector P2 (PGM) on the panel PCB
and connector P2 on the programmer PCB, and
then return them to their positions.
• Replace the programmer with a new one.
• Replace the panel circuit board with a new one.
Parts to be replaced
Control circuit
board.
EM switch
assembly.
Panel circuit board
Programmer
Panel circuit board
Error status