Janome 8050 Service Manual page 21

Step and
itemS to
check
tUrn on the power Switch
01)
while SimUltaneoUSly preSS-
fUnction of
ing the Start/Stop bUtton
lcd, bUzzer
and locking Stitch bUtton.
and lamp
preSS the Start/Stop bUtton.
if the reSUlt iS correct con-
dition, 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.
preSS bUttonS 1– 6.
02)
bUtton
if the reSUlt iS correct con-
dition, 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.
03)
lower the bUttonhole lever.
bUttonhole
move the bUttonhole lever
SenSor
back and forth.
if the reSUlt iS correct con-
dition, 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.
04)
move the bobbin winder
bobbin
Spindle to the
winder
right.
Switch
retUrn it to the left.
if the reSUlt iS correct con-
dition, 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.
self-diagnostiC test
procedUre
Sewing lamp and lcd backlight lit.
lcd diSplayS "01".
bUzzer SoUndS. lcd diSplayS
SymbolS and nUmberS in order.
lcd repeatS diSplaying after all
SymbolS and nUmberS are Shown.
lcd diSplayS "Sc 02".
bUzzer SoUndS when bUtton iS
4 1
preSSed. bUtton nUmber iS diS-
played when the bUtton iS preSSed.
3
2
5 6
lcd diSplayS "S3" when bUtton 1 iS preSSed.
lcd diSplayS "S4" when bUtton 2 iS preSSed.
lcd diSplayS "S5" when bUtton 3 iS preSSed.
lcd diSplayS "S6" when bUtton 4 iS preSSed.
lcd diSplayS "S8" when bUtton 5 iS preSSed.
lcd diSplayS "S9" when bUtton 6 iS preSSed.
lcd diSplayS "Sc 04".
when the bobbin winder Spindle iS
moved to the left, bUzzer SoUndS.
when the bobbin winder Spindle
iS moved to the right, bUzzer
SoUndS and lcd diSplayS the bob-
bin Symbol.
correct condition
lcd diSplayS "Sc 03".
when the bUttonhole lever iS
pUlled, bUzzer SoUndS and lcd
diSplayS bh Symbol.
when the bUttonhole lever iS
pUShed, bUzzer SoUndS and lcd
diSplayS bh Symbol.
bh symbol
bobbin symbol
19
defective condition
Sewing lamp doeS not lit.
lcd backlight doeS not lit.
lcd doeS not diSplay "01".
bUzzer doeS not SoUnd.
lcd doeS not tUrned on.
lcd doeS not diSplay any
SymbolS or not in order.
–Remedy–
replace the circUit board a.
bUzzer doeS not SoUnd.
lcd doeS not diSplay the
nUmber correctly.
–Remedy–
replace the circUit board a.
replace the circUit board f.
bUzzer doeS not SoUnd.
bh Symbol doeS not appear.
–Remedy–
replace the circUit board a.
replace the circUit board f.
bUzzer doeS not SoUnd.
bobbin Symbol iS not diS-
played.
–Remedy–
replace the circUit board a.
replace the circUit board f.