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Nr
Function
1
2
P F A F F
LEDs and
D isplay
are flashing.
Key test
All the
31
keys
must
be
pressed.
Foot
control test
6
Foot control test
Press foot
control
release
press
release
SeH-test table
41.
Visual check
action at machine
Connect foot control,
run
machine.
Master switch off.
Have buttonhole gaugo
and full bobbin ready.
Press key ·sew slow•
and actuate
master switch
after
3
s
Visual check:
all LEDs are flashing w i t h
a dark display.
D isplay becomes bright
while LEDs are still
on. Display switches
over to
matrix display.
LEDs go
out Matrix display
Is inverted.
12
key
for
Within
s
each
every key
must
be
pressed
once.
All
keys pressed.
The foot control must
be
pressed within
s
12
Thefoot control must be
released
12 s.
within
The
foot
control must be
pressed within
12
s.
The foot control must
be
12
released within
s.
for cl. 7550
Machine
display
PFAFF
P F A F F
self-test
{LEDs and
display are
flashing three
times in the
rythm
of the
display.
LED
Red
Is
flashing a
few
limes).
Key
test
(Every
key specified
by its
name).
.OK·
Keys
off
-
Press foot
control
Release
foot
control
Press foot
control
Release foot
control
"OK"
Remarks
Needle bar
.
up
Visual check
negative,
exchange
respective
subassemby.
tauschen.
Readings in
brackets
are
not displayed.
In case of key
error repeat
test or
exchange.
of
In case
foot
control error
re.peat test
99
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