Singer 9985 User manual

SERVICE MANUAL
9985
9/10/2013

SERVICE MANUAL
2
Table of contents
REMOVING THE EXTERIOR PARTS ............................................................. 3
A. Light Cove ................................................................................................ 3
B. Base .......................................................................................................... 3
C. Top Cove (Flap) ....................................................................................... 4
D. Hinge Cove .............................................................................................. 4
E. Th ead Tension Cove .............................................................................. 4
F. Side Enclosu e .......................................................................................... 5
G. Handle and Unit Cove .............................................................................. 5
H. Needle Plate .............................................................................................. 6
I. F ont Enclosu e ......................................................................................... 7
J. Rea Enclosu e ......................................................................................... 8
K. F ont panel (f om F ont Enclosu e) ........................................................... 8
REPLACING THE EXTERIOR PARTS ............................................................ 9
K. F ont panel (to F ont Enclosu e) ............................................................... 9
J. Rea Enclosu e ......................................................................................... 9
I. F ont Enclosu e ....................................................................................... 10
H. Needle Plate ............................................................................................ 10
G. Handle and Unit Cove ............................................................................ 11
F. Side Enclosu e ........................................................................................ 12
E. Th ead Tension Cove ............................................................................ 12
D. Hinge Cove ............................................................................................ 12
C. Top Cove (Flap) ..................................................................................... 13
B. Base ........................................................................................................ 13
A. Light Cove .............................................................................................. 14
CHECK AND ADJUSTMENT ......................................................................... 15
1. HEIGHT OF NEEDLE BAR ..................................................................... 15
2. GAP BETWEEN NEEDLE AND HOOK .................................................. 16
3. TIMING OF THE HOOK .......................................................................... 17
4. HEIGHT OF THE FEED DOG ................................................................. 18
5. NEEDEL CENTER POSITION ................................................................ 19
6. TIMING OF THE UPPER AND LOWER SHAFT ..................................... 20
7. ADJUSTING THE FORWARD REVERSE STITCH ................................ 21
8. BOBBIN WINDER ................................................................................... 22
9. HEIGHT AND DIRECTION OF PRESSER FOOT .................................. 23
10. HEIGHT OF NEEDLE THREADER......................................................... 24
11. ADJUSTMENTS FOR BUTTONHOLE LEVER POSITION .................... 25
12. MOTOR BELT TENSION ........................................................................ 26
13. TIMING BELT TENSION ......................................................................... 26
14. BACKLASH OF HOOK GEAR ................................................................ 27
15. UPPER THREAD TENSION UNIT .......................................................... 28
16. ADJUSTING THE LOWER THREAD TENSION ..................................... 28
17. FLATNESS OF THE BASE ..................................................................... 28
LOCATING THE DEFECTED ELECTRICAL PART ...................................... 29
1. To tu n off the audible beep .................................................................... 29
2. The self-diagnostic p og am .................................................................... 29
3. Messages on LCD ................................................................................... 33
4. Test Patte n Sc een / E asing Memo y ................................................... 34
5. Calib ating the sc een ............................................................................. 35
6. Elect ical Pa ts Connection ..................................................................... 36
7. Function buttons of CPU boa d ............................................................... 37
SINGER® is a egiste ed T adema k of The Singe Company Ltd.

SERVICE MANUAL
3
REMOVING THE E TERIOR PARTS
A. Light Cove
1. Loosen the light cove set sc ew (a).
B. Base
1. Remove the extension table.
2. Tilt the machine backwa d and emove the 3 base set
sc ews (a, b, c). Remove the base.
2. Pull light cove as shown so that the light cove hook
(b) will come off.
The exte io pa ts should be emoved in sequence as
followings.
CAUTION:
Always disconnect the main lead plug f om electc ial
outlet when emoving the exte io pa ts.
3. Ca efully disconnect the connecto with holding the
leve (d).
This connecto connects te minal box and powe
ci cuit boa d.
1
a
2
b
2a
bc
3d

SERVICE MANUAL
4
C. Top Cove (Flap)
1. Open the top cove .
2. Push the ight side of top cove backwa d and emove
the hinge (a).
D. Hinge Cove
1. Inse t the tip of sc ew d ive and pull up the f ont side
of hige cove .
E. Th ead Tension Cove
1. Remove the sc ew (a).
3. Slide the top cove to the ight and emove the hinge
(b).
2. Push the Th ead tension cove backwa d ; 2 hooks (b,
c) will come off.
3. Pull up the cove .
2
a
3
b
1
1
2
a
bc

SERVICE MANUAL
5
F. Side Enclosu e
1. Remove the sc ew (a).
G. Handle and Unit Cove
1. Remove the unit cove set sc ews (a, b) and handle
set sc ews (c, d).
2. Stand up the handle.
2. Push the side enclosu e slightly backwa d to come off
the 2 hooks (b, c).
3. Pull the side enclosu e to the ight and emove it.
1
a
2
b
c
3. Push and pull up the ight side of unit cove backwa d
so that the hook of unit cove will come off.
1b
a
c d
3

SERVICE MANUAL
6
H. Needle Plate
1. Remove the p esse foot and holde .
2. Remove the 2 sc ews (a, b) holding the needle plate.
4. Next, push the left side of unit cove backwa d and
pull up it to come off f om the th ead guide cove . 4
5. Slide the handle and unit cove to the left and emove
them. 5
2ab
3. Lift up the ight side of needle plate and emove it. 3

SERVICE MANUAL
7
I. F ont Enclosu e
1. Loosen the sc ew (a).
2. Loosen the sc ew (b).
3. Tilt the machine backwa d.
Push the left side of ea enclosu e (c) and pull the
f ont enclosu e (hook-d will come off).
4. Pull up the f ont enclosu e and come off the hook-e.
Pull the enclosu e to the left and come off the hook-f.
1
3
a
c
d
4 5
e
f
2
6
b
5. Push the ea enclosu e to the left and come off the
hook-g.
6. Pull the both black pa ts of connecto (i) and pull the
cable.
Remove the f ont enclosu e.
g
i

SERVICE MANUAL
8
J. Rea Enclosu e
1. Lowe the p esse foot lifte .
2. Remove the 3 sc ews (a, b, c).
(sc ew-c is longe than othe s.)
3. Pull the ea enclosu e backwa d and emove it.
K. F ont panel (f om F ont Enclosu e)
1. Disconnect the 2 connecto s f om the f ont panel (a:
Sta t/Stop switch boa d) (b: Cont olle jack assy.)
3. Come off the hook (h) and pull up the f ont panel
backwa d and emove it.
2
c
b
a
1
b
a
3
2
2. Remove the 5 sc ews (c, d, e, f, g ).
c
dg
e
f
h

SERVICE MANUAL
9
b
a
REPLACING THE E TERIOR PARTS
K. F ont panel (to F ont Enclosu e)
1. Place f ont enclosu e and fit the hook (h) and
etighten the 5 sc ews (c-g).
J. Rea Enclosu e
1. Lowe the p esse foot lifte .
2. Replace the ea enclosu e.
3. Retighten the 3 sc ews (a, b, c).
(Sc ew-c is longe than othe s and eplace loosely.)
The exte io pa ts should be eplaced in eve se se-
quence when emoving. (K. to A.)
2. Connect the 2 connecto s (a: Sta t/Stop switch boa d)
(b: Cont olle jack assy.) 2
3
c
b
a
1
c
dg
e
f
h

SERVICE MANUAL
10
I. F ont Enclosu e
1. Inse t the cable into the connecto (h) until stop.
Push the both black pa t and lock the cable secu ely.
H. Needle Plate
1. Inse t the hook (c) of needle plate to the machine.
2. Replace the f ont enclosu e so that the 4 hooks will fit
in place.
3. Retighten the sc ew (a) and (b) with pushing the f ont
enclosu e to the machine f ame.
2. Retighten the sc ews (a, b).
1
h
2
3
a
2
a
b
1c
b

SERVICE MANUAL
11
G. Handle and Unit Cove
1. Set the handle to the unit cove and inse t the handle
hinge pin into the left side hole of handle f om left
side.
2. Place the handle and unit cove onto the top of
machine.
3. Inse t the hinge pin on the machine into the ight side
hole of handle.
4. Replace the unit cove so that the each hook fit into
place.
5. Retighten the handle set sc ews (c, d) and unit cove
set sc ews (a, b).
1
2
3
4b
a
c d
5

SERVICE MANUAL
12
F. Side Enclosu e
1. Replace the side enclosu e so that the each hook fit
into place.
2. Retighten the sc ew (a).
E. Th ead Tension Cove
1. Replace the th ead tension cove so that the each
hook fit into place.
2. Retighten the sc ew (a).
D. Hinge Cove
1. Inse t the ea hook into the machine and push the
hinge cove .
1 2
a
1a 2
1

SERVICE MANUAL
13
B. Base
1. Tilt the machine backwa d.
2. Connect the connecto so that the hook (d) will fit into
place.
3. Replace the base and etighten the 3 sc ews.
C. Top Cove (Flap)
1. Slide the top cove to the left so that the hook (b) will
fit onto the pin of unit cove .
2. Pull the ight side of top cove and snap on the hook
(a) onto the pin of unit cove .
1
2
b
a
3
2d

SERVICE MANUAL
14
A. Light Cove
1. Loosen the light cove set sc ew (a).
2. Replace the ligth cove so that the hook (b) will fit into
place.
3. Retighten the sc ew (a).
1
a
b
2
3
3

SERVICE MANUAL
15
d
CHECK AND ADJUSTMENT
1. HEIGHT OF NEEDLE BAR
Height of needle ba could be the cause fo stitches to
skip. Check as the following p ocedu es.
1. Set the patte n to [Utility stitch No.1] which is st aight
stitch on cente needle position.
2. Raise the needle ba to its highest point by tu ning the
handwheel towa d you. Remove the p esse foot.
Remove the needle plate. Lift up the bobbin holde
and emove it.
3. Tu n the handwheel towa d you until the needle
comes to its lowest point.
4. Then, the spacing between the su face of hook ace
and the top edge of needle eye must be (4.9±0.1
mm).
If this spacing is not co ect, adjust as follows.
5. Remove the light cove .
6. Remove the 3 sc ews (a, b) and emove the take up
leve cove and b acket (c) by sliding it upwa d.
1
4.9±0.1 mm
2
3
4
6
c
7
7. Raise the needle ba 4.9mm f om its lowest point by
tu ning the handwheel.
Loosen the sc ew (d) on the needle ba holde . (2 mm
hex. w ench)
Adjust the needle ba so that the top edge of needle
eye is aligned with the su face of hook ace.
Retighten the sc ew (d) and check the height again.
CAUTION: Do not change the needle ba di ection at
this adjustment. The long g oove of needle must be
facing f ontwa ds.
8. Replace the take up leve cove and sc ews.
a
b

SERVICE MANUAL
16
2. GAP BETWEEN NEEDLE AND HOOK
If the needle hits against the hook, it may be the cause
of needle and th ead b eakages. If the gap between
needle and hook is too big, it will cause to skip stitches.
Check and adjust as follows:
P io to make this adjustment, check that the needle is
not bent and the needle is inse ted co ectly.
1. Remove the needle plate and bobbin holde .
2. Set the patte n at [Utility No. 2]. (St aight stitch on left
needle position.)
3. Tu n the handwheel towa d you until the needle will
c oss ove the hook.
4. Then, check the gap between needle and hook is
about 0.10 to 0.20 mm.
If the needle is hitting against the hook o if the gap is
too much, adjust as follows:
5. Remove the light cove .
2
1
3
0.10-0.20 mm
View f om
upwa d
4
6
6. Adjust the gap by tu ning the adjusting sc ew (a) with
2 mm hex. w ench.
• If the gap is too big, tu n the sc ew to the left with
viewing f om f ontwa d.
• If the needle is hitting the hook, tu n the sc ew to the
ight with viewing f om f ontwa d.
7. Replace the bobbin holde and needle plate and light
cove .
a

SERVICE MANUAL
17
3. TIMING OF THE HOOK
P io to making this adjustment, be su e that the needle
ba is set at the co ect height. (Sec. 1)
Check the timing of hook as follows:
1. Remove the needle plate and bobbin holde .
2. Set the patte n at [Utility No. 2]. (St aight stitch on left
needle position.)
3. Tu n the handwheel towa d you until the needle is at
its lowest point.
4. Then, tu n the handwheel slowly to tu n the hook
counte -clockwise until the tip of hook is aligned with
the ight side of needle.
At this time, the gap between the tip of hook and the
top edge of needle eye should be (1.3±0.2 mm).
If the gap is too small o too la ge, adjust as follows:
5. Remove the f ont enclosu e.
1
4
6
2
1.3±0.2 mm
a
6. Loosen the two 2 sc ews (a) on the lowe shaft gea
with a 2.5 mm hex. w ench.
7. Tu n the hook ace by hand so that the tip of hook will
align with the ight side of needle.
8. In this position, hold the hook ace with you left hand
and tu n the handwheel towa d you to obtain the
co ect gap (1.3 mm).
9. Tighten the sc ews and check the timing again.
10.Replace the f ont enclosu e.

SERVICE MANUAL
18
4. HEIGHT OF THE FEED DOG
If the feed dog does not come up ove the needle plate
enough, it will esult in insufficient and/o uneven feed of
fab ics.
1. The feed dog should come up ove the needle plate
(1.2-1.3 mm) when its highest position.
If it does not come up enough, adjust as follows:
2. Remove the needle plate.
1
1.2-1.3 mm
3. Loosen the nut (a) behind the feed dog.
• If the feed dog is too low;
Tu n the adjusting sc ew (b) (2.5mm hex. w ench)
clockwise.
• If the feed dog is too high;
Tu n the sc ew (b) counte clockwise.
Re-tighten the nut (a) so that the sc ew (b) will not move.
4. Re-check the height of feed dog.
3
b
a

SERVICE MANUAL
19
2
5
b
c
6 7
5. NEEDLE CENTER POSITION
1. When the st aight stitches is set at cente needle
position (St aight No.1), the needle should fall into the
cente position (align with the cente line ma k (a) of
the gene al pu pose foot (A)).
If it is not so, adjust as follows:
2. Set the patte n at [St aight No.1].
3. Attach the gene al pu pose foot (A) and lowe the
p esse foot lifte .
4. Remove the light cove .
5. Loosen the cente sc ew (b).
6. Tu n the adjusting sc ew (c) left o ight until the
needle align with the cente line ma k (a) of the foot.
• When you tu n the sc ew to the ight, needle will move
to the left.
• When you tu n the sc ew to the left, needle will move
to the ight.
7. Retighten the sc ew (b) and e-check the position of
needle.
8. When you have adjusted this position, check the
timing of the hook again. (Sec. 3)
1a

SERVICE MANUAL
20
6. TIMING OF THE UPPER AND LOWER SHAFT
The uppe and lowe shaft must be positioned co ectly
as follows.
1. Remove the f ont enclosu e.
2. Tu n the handwheel towa d you until the needle is its
lowest point. At this time, the ma k (a - ve y small
molded line on edge) on the lowe shaft timing pulley
must be facing towa d you.
If it is not so, adjust as follows:
2
a
3
b
4 5
7 8
3. Loosen the sc ew (b) tightening the tension pulley
b acket.
4. Slip out the timing belt f om lowe shaft timing pulley.
5. Tu n the lowe shaft timing pulley so that the ma k
faces towa d you.
6. Hook the timing belt on the pulley.
7. Push the tension pulley b acket so that the edge of
b acket should be 0-1 mm highe than the casting.
8. Retighten the sc ew (b)
9. Check the timing again and eplace the f ont enclo-
su e.
10. When you have adjusted it, check the timing of the
hook again. (Sec. 3)
0-1 mm