Janome 8050 Service Manual - Self-Diagnostic Test
20
correct condition
Step and
itemS to
check
05)
not
applicable
for thiS
model
procedUre
defective condition
tUrn the handwheel toward
yoU.
lower the needle bar from
itS higheSt to itS loweSt
poSition.
raiSe the needle bar from
itS loweSt poSition to itS
higheSt poSition.
if the reSUlt iS correct
condition, preSS the Start/
Stop bUtton to proceed the
next Step.
if the reSUlt iS defective
condition, preSS the reverSe
Stitch bUtton to proceed the
next Step.
bUzzer doeS not SoUnd.
Stitch width or length Sym-
bol doeS not appear.
–Remedy–
replace the circUit board a.
replace the circUit board p.
zigzag motor doeS not get
defaUlt poSition.
–Remedy–
replace the zigzag motor.
replace the circUit board a.
feed motor doeS not get
defaUlt poSition.
–Remedy–
replace the feed motor.
replace the circUit board a.
06)
Upper
Shaft
poSitioning
SenSor
07)
zigzag
motor
(Step
motor)
feed
motor
tUrn the handwheel toward
yoU.
lower the needle bar from
itS higheSt to itS loweSt
poSition.
raiSe the needle bar from
itS loweSt poSition to itS
higheSt poSition.
if the reSUlt iS correct
condition, preSS the Start/
Stop bUtton to proceed the
next Step.
if the reSUlt iS defective
condition, preSS the reverSe
Stitch bUtton to proceed the
next Step.
lcd diSplayS “Sc 06”.
tUrn the handwheel.
lcd diSplayS Stitch width Sym-
bol when the needle bar iS at
zigzag phaSe.
Stitch
width
Symbol
Stitch
length
Symbol
lcd diSplayS Stitch length Sym-
bol when the needle bar iS at
feed phaSe.
lcd diSplayS “Sc 07”.
lcd diSplayS Stitch width Sym-
bol when the needle bar iS at
middle poSition. (zigzag motor
get defaUlt poSition.)
lcd diSplayS Stitch length
Symbol when feed motor getS
defaUlt poSition.
Stitch
length
Symbol
Stitch
width
Symbol