NO.
IN
CHAPTER
8
PROBABLE
CAUSES
REPLACEMENT
FLOWCHART
AND
CHECK/
ADJUSTMENT
I
REPAIR
ERROR
STATUS
PARTS
#11
1.
Presser plate
lifter
Refer
to
#4,
3.
Rapid feed can
not
switch and its cable
be
used
during
the
defective
test.
#12
Feeding mechanism
Adjust
the
feeding mechanism
to
move
The
machine does
not
adjusted. smoothly by hand.
not
operate
as
programmed
Refer
to
#6,
Nos.1, 3, 4, 5, and 6 in
the
during
the
test.
PROBABLE
CAUSES
column .
#13
1.
Cable defective Check
continuity
between connector
P13
of
The
machine will
the
main circuit board and
P4
of
the
PMD
not
sew.
circuit board.
2.
Main
circuit board
If
error code No.2
does
not
appear on
the
Main
circuit
defective
ERROR
indicator, check voltages on
the
main
board
drcuit
board.
3. Power module
If
error
code No.2 appears
on
the
ERROR
PMDdrcuit
short-drculted
indicator and
the
fuse No.4 is blown,
the
board
power
module is short-circuited.
FuseSAFB
#14
1. Synchronizer
or
Its
(a)
Check
if
connector P14
of
the
main
Synchronizer
The machine
cable defective
circuit board and connectors
J2
and
P2
of
assembly
operates
at
high
the
control box are correctly connected.
speed and
then
If
not,
correct
the
connections.
stops
suddenly
(b) Replace
the
synchronizer.
while
displaying
an error code.
#15
Synchronizer
or
its
Refer
to
#14.
Synchronizer
The
machine
cable defective
NOTE:
If
the
machine
is
placed
In
this
error
operates
but
the
status,
the
test
operation
will
be
presser
plate does
normally performed.
not.
#16
1. Synchronizer
or
Its
Refer
to
#1
5.
Synchronizer
The thread can
not
cable defective
be
cut.
2.
Main
circuit
board
(a)*While inserting
the
connector
P1
Into
J 1,
Maindrcuit
defective
let
the
machine perform thread
board
trimming
operation, and measure
the
voltages between pins 5 (
+)and
6 (·)
(for thread
trimmer
solenoid), and
3
9
between pins 3
(+)and
4
(·)(for
tension
release solenoid: BAS-326A and 326LA
IOOO
only) from
the
lead
wire
side.
tfthe
5~0]
tester does
not
oscillate,
the
main
drcuit
board
is
defective.
a
lc
t.2_
o
I
1
-21-
From the library of: Superior Sewing Machine & Supply LLC
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