Singer 1669U101 User manual

Service Manual
SINGER®
MACHINE
1669U 101
102
200
300
400
500
@A registered trademark of The Singer Company L1m1ted
Copyr:ght@l 998 The Singer Company Limited
All Rights Reserved Throughout The World

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CONTENTS
1. PREFACE ..................................
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. 1
2. NOTES ON SAFETY .
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. 1
3.
MEANINGS
OF
THE SYMBOLS ................................................................................. 1
4. PRINCIPAL PARTS ..................................................................................................... 2
5. SPECIFICATION ........................................................................................................... 3
6. ADJUSTMENT OF NEEDLE AND SHUTTLE ............................................................... 4
7. ADJUSTMENT OF OSCILLATING SHAFT GEAR BACKLASH ................................... 5
8. ADJUSTMENT OF FEED PLATE LOCATION .............................................................. 5
9.
TO
ADJUST POSITION OF PRESSER FOOT .............................................................. 6
10. TO ADJUST POSITION OF CAM BRACKET ............................................................... 7
11.
ADJUSTMENT OF WIPER HEIGHT ............................................................................. 8
12.
TO
ADJUST TENSION RELEASING BAR SOLENOID ................................................ 8
13.
TO
ADJUST POSITION OF THREAD TRIMMER CAM ................................................ 9
14.
TO
ADJUST HEIGHT OF ROLLER .............................................................................. 1
O
15. TO ADJUST POSITION OF
SHAFT
.............................................................................. 10
16. TO ADJUST LENGTH OF KNIFE BAR OPERATING LEVER CONNECTING ROD .....
11
17. ADJUSTMENT OF KNIFE POSITION ..........................................................................
11
18.
TO
TIME THREAD TRIMMER .....................................................................................
12
19. ADJUSTMENT OF CLAMP FOOT HEIGHT ..................................................................
12
20.
TO
ADJUST SENSOR ...................................................................................................
12
21.
TO
INSTALL SYNCHRONIZER ....................................................................................
13
22.
TO
ADJUST SYNCHRONIZER .....................................................................................13
23. ADJUSTMENT OF BUTTONHOLE SEWING MACHINE (1669U 200) .........................
14
24. ADJUSTMENT
OF
BUTTON SEWING MACHINE (1669U 400) ...................................
16
25. CHECK
MODE
............................................................................................................
21
26. TABLE TOP CONSOLE
CHECK
MODE (OPTION) .....................................................
25
27. ERROR
CODE
NUMBERS............................................................................................
29
28. GREASING POINTS .....................................................................................................30
29. TROUBLE-SHOOTING GUIDE .....................................................................................
31
30. CONTROL BOX DIAGRAM ..........................................................................................
36
31. MAIN
CONTROL
BOARD DIAGRAM ............................................................................
37
32.
D.
C
POWER
SUPPLY BOARD DIAGRAM .................................................................
38
33. INVERTER BOARD DIAGRAM .....................................................................................
38

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1. PREFACE
This service manual
is
to
explain the methods to be used
for
adjusting various parts ofthe
machine
and
intended for use by mechanics and service personnel.
When adjusting the machine, it is recommended that you
make
reference not only to this
"Service
Manual"
but also to the "Operator's Guide" and "Parts List" furnished with the
machine.
2. NOTES ON SAFETY
• When exchanging gauge parts (e.g. needle, presser foot, needle plate, feed plate, bob-
bin)
or
when
changing setting condition of the
machine,
during threading, when the
machine
is left unattended or during service work, be
sure
to turn main switch off or
disconnect
the
main plug.
In
case it is
necessary
to
check
the machine
or
perform
service
work
with the main switch on, care should be taken not to press the foot start
inadvertently.
• General service work must be carried out only
by
appropriately trained persons.
• Repair, conversion and special maintenance work must be carried out only by techni-
cians or persons with appropriate training.
• When safety devices have been removed, be sure to replace them and make sure they
perform properly after completion of adjustment
or
service work.
• Work
on
electrical equipment must be carried out by electricians or appropriately trained
persons.
•
When
exchanging parts, be sure to use Singer approved parts.
• When exchanging gauge parts (e.g. needle, presser foot, needle plate, feed plate, bob-
bin), be sure to use correct parts.
• Singer shall not be liable for any damages caused by modifications made on the part of
the user.
• Work on parts and systems under electric current is not permitted, except as specified
in
regulations EN50110.
• Commissioning of the sewing head
is
prohibited until such time as the entire sewing unit
is
found to comply with EC regulations.
3. MEANINGS OF THE SYMBOLS
Danger spot!
Items requiring special attention
Danger of injury to operative
or
service staff.
Be sure
to
observe and adhere to these safety notes
Earth

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4. PRINCIPAL PARTS
CD
Power
switch
®
Control box @ Control panel
©
Foot switch
®
Motor
®Tabletop
console ® Manual tension releasing lever 0
Machine
pulley
Safety device
®
Finger guard
@ Belt cover
@ Eye guard
@ Motor cover
(jJ)
Thread take-up
lever
guard
2

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5. SPECIFICATION
Stitch type Single needle lockstitch
*
Maximum
speed 2700 SPM (strrch length3.5 max.)
Sewing area
(X-Y)
30.0 X 30.0mm
Feed system Intermittent feed (pulse motor drive)
Stitch length
0.1
-10.0mm
No. of stitches Option (21, 28, 29, 36 and 42 already input)
Maximum
No. of stitches 10,000 stitches
Clamp lift system Electro-magnetic solenoid
Clamp foot lift
Max.17mm
Shuttle hook Oscillating shuttle hook
(1.7 times hook is used
in
101. Standard hook is
used
in other machines)
Wiper Standard fitting
Thread trimmer Standard fitting
Bobbin counter Indicates when to change bobbin
Data memorizing system
EEPROM
No. of patterns memorized 22 patterns already input.
(Additional patterns up
to
64 max. can be input. Total No. of stitches 10,000 max.)
Motor
3 phase induction motor, 400W
Weight Machine head approximately
51
kg
Control box
11
kg
Electrical rating Single phase 100V-115V, 3 phase
200V-240V
Application For bar tacking on men's suit, slacks, jeans,
work
clothes, light
weight underwearand other apparel.
*
Maximum efficient speed is determined upon nature of operation and type of material being sewn.
3

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6.
ADJUSTMENT OF NEEDLE AND SHUTTLE
J '
I------,
5
®
4
1.
To
Adjust Needle Bar Height
Turn driving wheel by hand until needle
bar
is
at
its
lowest point. Loosen needle bar connecting link screw
@ and move needle bar
up
or down until the highest
mark®
on needle bar aligns with lowerend of needle
barlower bushing
CD·
If
Catalog No. 3355-01 needle
is
used, align
mark©
on needle bar with lower end
of
needle bar lower bushing.
2.
To Adjust Timing of Needle and Shuttle
Raise needle bar from
its
lowest point by turning driving
wheel with
hand
and align the second mark
®
on
needle bar with end of needle
bar
lower bushing
CD
.
Loosen screw 0 and
tum
shuttle body
in
the arrow
direction so that the centerof needle aligns with shuttle
point
If
Catalog No. 3355-01 needle
is
used, align mark
@ on needle
bar
with lower end of needle bar lower
bushing.
3. To Adjust Needle and Shuttle Driver
Tum
driving wheel by hand and align shuttle point
with
the
center
of
needle.
Loosen
screw
©
and turn
oscillating shaft bushing adjusting stud
®
so
thatneedle
contacts with shuttle driver.
If
shuttle driver does not
properly contact needle, needle and shuttle point will
interfere causing damage to the parts.
If
the contact
is
too heavy,
it
will cause skip stitching.
4.
Adjustment
of
Shuttle
Body
and
Driver
Rotational Direction Clearance
Tap
part®
and
®,
and adjust so that clearance
between
shuttle body and
driver
in
the
rotational
direction
is
0.3 -0.5mm.
5.
To
Adjust
Clearance
Between
Needle
and
Shuttle Point
Tum
driving wheel by hand and align shuttle point
with
the center of needle. Loosen set screw
®
and turn
shuttle race
body
adjusting stud
0
so that clearance
between needle and shuttle point
is
0.05 -
0.1
mm.
Switch off the machine.

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6. To Adjust Shuttle Bobbin Cap Location
Loosen two screws®, move and adjust shuttle bobbin
cap so that needle location at penetration is equal
in
the left and right direction, and back of needle is even
with
comer® in the backand forth direction. Care must
be taken as when shuttle bobbin cap
is outof position
either
in left and right orback and forth direction, needle
thread will be caught
in shuttle. If there should be any
bruises at location ® ,this will be causes for bobbin
thread
breakage and so remove bruises with emery
cloth and polish with green rouge.
Switch off the machine.
7. ADJUSTMENT OF OSCILLATING SHAFT GEAR BACKLASH
Loosen set screw CD ,tum and adjust oscillating rock
shaft eccentric hinge pin ®so that when shuttle driver
® is turned by hand in the rotating direction, play at
the end of driver
is less than 0.05mm.
Switch off the machine.
8. ADJUSTMENT OF FEED PLATE LOCATION
'
,,,,,;, ....
5
For Light Material
Loosen
screws @ and adjust so that each of the
clearances ® (front and back direction) and each of
the clearances @ (left and right direction) between
opening
in feed plate CD and arch clamp foot @ are
even.
For Heavy Material
Loosen screws @ and adjust so that openings
in feed
plate
CD and arch clamp foot @ match both in front
and rear, left and right direction.
Switch off the machine.

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9.
TO
ADJUST POSITION OF PRESSER FOOT
'
'
Sideways
Y-axis
0
-~ft87l-t--t-l
++'~+-'.I
I-He»-'-
Turn machine pulley
to
bring down the needle into
needle
hole
and
position
the
presser foot
so
that
the
clearance
between
the
presser
foot
and
needle
is
equal
front
to
back
and
sideways.
Under
this
condrtion,
loosen
sensor
screw
@
and
tum
original position
reflector
CD
until
the
notch
on
the
original
position reflector
CD
is
at
the center
of
sensor@. (Both
X-axis
sensor
and
Y-
axis
sensor)
Switch off the machine.
0
__;1--1-l
-----•
-f-~p.t,,j"f~'\'b:tt---6}
6

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10.
TO
ADJUST POSITION OF CAM BRACKET
1.
Lateral Driving Cam Bracket
Loosen
lateral
driving
cam
bracket
screw
CD
(2
places}
and
push
bracket
in
the
direction
shown
with
arrow
mark (
..
}
parallel
to
the
locating
surface
(machined
suriace).
Then
tighten
screw
(D
making
sure
that
there
is
no
play
between
lateral
driving
cam
®
and
roller
@ .
2.
Longitudinal Driving Cam Bracket
Loosen
longitudinal
driving
cam
bracket
screw©
(2
places)
and
push
bracket
in
the
direction
shown
with
arrow
mark(
..
)
parallel
to
the
locating suriace (machined suriace).
Then
tighten
screw©
making
sure
that there
is
no
play
between
longitudinal
driving
cam
®
and
roller
®·
0
©
Switch off the machine.
Longitudinal Driving Cam Bracket
7
Locating surface
\
(D
Lateral Driving Cam Bracket
------~----
-.----
~--,--------
'
'
'

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11.
ADJUSTMENT OF WIPER HEIGHT
(101,102)
3mm-+j
__
_
25
mm
(200,
300,
500)
CD
20
mm
Loosen
screw
G)
and move wiper
bracket®
up
or
down, as required, so that clearance between wiper
and needle
point
is
3.0mm
when
wiper
passes the
needle point. Tighten screw.
Loosen screw @ and move
wiper©
to the left or
right,
as required. so that the distance between wiper point
and needle point
is
25mm. Tighten screw @ .
Switch off the machine.
Loosen screw
CD
and move bracket
@
up
ordown, as
required so that the clearance between portion
A
of
finger guard
@
and the needle point
is
3
mm
when
portion
A
of finger guard passes the needle point.
Then, loosen
screw
©
and move finger guard ® to
the left
or
right,
as
required,
so
thatthe distance between
portion
A
and the needle point is
20
mm when the
clamp
is
in
down position.
12.
TO
ADJUST
TENSION RELEASING BAR SOLENOID
8
Loosen set
screw
@
and adjust opening plate
Cg)
so
that tension
disc
©
is opened approximately
1
mm
when tension releasing bar solenoid
CD
is moved to
the end of its stroke
in
the direction shown with arrow
mark.
Note: Check to seethat tension disc
©
is
not relaxed
when tension releasing barsolenoid
(D
returns
to
its
original position bymeans of return spring.
Switch off the machine.

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13.
TO
ADJUST POSITION OF THREAD TRIMMER CAM
Timing Mark on
Rotational direction Thread Trimmer Cam
JI"_
__,-7'?""-...
Timing Mark
on
Arm Shaft
0
1.
Rotational direction
Loosen set screw ®and align timing mark on the arm
shaft with timing
mark
on
thread trimmer cam. Then
tighten set screw.
2.
Axial direction
Loosen set screw
®and adjust
the
position
of
cam so
that there
is
a clearance
of
0.5mm
between trimmer
cam
CD
and
roller@.
TO
ADJUST POSITION OF THREAD TRIMMER CAM
{CLOSE ADJUSTMENT)
Needle bar
connecting stud
E
E
l/"J
c:i
,..._
Underside of the arm
9
Thread trimming timing is adjusted by aligning timing
mark on the
arm
shaft
with
the
timing mark of thread
trimmercam
@.
Fora closeradjustment, preformthefollowing measure.
Push
knife
bar
operating
lever
CD
in the direction
indicated by arrowat the machine upperstop position
and hold it
so
that
roller ® is in the groove of thread
trimmercam @ . Adjustthread trimmercam @closely
by loosing set
screw
© so that stationary knife and
movable knife will be disengaged when the clearance
between the underside ofthe
arm
and the upperedge
of needle bar
connecting
stud is 70.5 mm ( on the
lowering stroke of needle bar), turning machine pulley
to the correct turning direction.
Switch off the machine.

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14.
TO
ADJUST HEIGHT OF ROLLER
0
0
Q)
u
c1
~I
Q)
i3
Q)
u
C
""
<ii
Q)
u
15.
TO
ADJUST POSITION OF SHAFT
CD
10
Loosen nut ©
and
adjust the height of roller
®
by
turning adjusting screw
@
so
that roller
®
goes into
the groove (wide groove section)
in
the thread trimmer
cam
(D
smoothly when needle barcomes down to
its
lowest point.
After the adjustment, secure adjusting screw
@)
with
nut©
so that it will not rotate.
Switch
off the machine.
Loosen screw
@
(2 places) and © and adjust the
position
of
shaft
so
that the rear end
of
shaft
®
is
located
2.0mm inside from the face end of bushing
CD
when
the roller ®
is
out of engagement with thread trimmer
cam®.
Note:
Be
sure
to
set
the
shaft without clearance
between bushing
CD,
collar and
lever.
Switch
off the machine.

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16.
TO
ADJUST LENGTH OF KNIFE
BAR
OPERATING LEVER CONNECTING
ROD
17. ADJUSTMENT OF KNIFE POSITION
E
E
0
0
11
Loosen nut
@
and adjust
rod
end bearing
CD
so that
the distance betweenthe center
of
rod
end bearing
CD
and the
center
of connecting rod screw hole
®
is
207mm. Also adjust rod end bearing
so
that rod end
bearing screw
©
is
square to connecting rod screw
hole ®when viewed from top and tighten nut
@ .
Loosen stationary knife screw
@
and move stationary
knife
CD
so that clearance between the knife and the
center of needle hole ®
in
throat plate
is
2.1
mm .
Clearance between (for reference)
Size of needle hole
statimary
knife and Clearance © between
center of needle hole stationary knife and
edoe of needle hole
0
1.6
2.1mm
0.6mm
0
2.0
2.1mm
0.6mm
0
2.5
2.1mm
0.3mm
Adjust height
of
stationary knife
G)
so
it
is
0.1
-0.15
mm higherthan throat plate needle
hole®
higher
edge.
Adjust height of movable knife
®
using movable knife
hinge screw adjusting washer ®
so
that
it
is
0.15 mm
higherthan the high edge of throat plate needle hole.
Adjusting washers ® are available
in
thicknesses
shown
in
table below.
Part No. Adiustinn washer thickness
418314-004
0.5
±0.02
mm
418314-003
0.45
±0.02
mm
418314-002
0.4
±0.02
mm
418314-001 0.35
+
0.02 mm
Switch off the machine.

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18. TO TIME THREAD TRIMMER
2
Loosen screw @ and adjust trimmer by moving lever
(upper) ©to the left or
right so that there is a clearance
of
6mm between the outside dia. of lever{lower) pin
CD and flat section of guide pin ®when the trimmer is
out of action (waiting).
Switch off the machine.
19. ADJUSTMENT OF CLAMP FOOT HEIGHT
®
----------c==_.._ CD
20. TO ADJUST SENSOR
-1
EB
,.l-- ....,,
-·•-i--------------
0)
Presser foot
at raised position
12
Loosen socket head bolt CD and adjust clamp foot
height by moving arch clamp foot lifting lever
adJusting
plate ® up or down. Maximum clamp foot lift amount
is 17mm from throat plate upper surface.
Switch off the machine.
Loosen screw © and adjust sensorby moving sensor
perceive plate @ front to back so that there is a
clearance of
17mm between sensor perceive plate @
and the point end of foot lifting block®·
Afterthe adjustment, make sure that sensor perceive
plate @ does not shield sensor © when presserfoot
is raised.
Note:
After adjustment, make sure that sensor
perceive plate@ does notinterfere with sensor
CD. In case interference conditionexists, loosen
screw ® and adjust by moving sensor CD up
and down.
Switch off the machine.

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21.
TO
INSTALL SYNCHRONIZER
®
Rotational direction
Machine Pulley
/
22.
TO
ADJUST SYNCHRONIZER
Needle
Bar
Connecting Link
E
E
l(J
<.O
C'J--'-----.....,....-=~=--
Bottom suriace of Arm
CD
Rotational direction
®
~
Black
3
@)
I
13
Align
synchronizer
set screw ®
(2
places) with the
timing
mark
<D
(2
places) provided
on
the machine
pulley and fasten synchronizer ®with set screws.
Switch off the machine.
Fix arm shaft
so
thatwhen machine pulley
is
rotated
in
its normal operating direction and needle baris
on
its
upward stroke, the distance between bottom surface
of arm and upper end of needle barconnecting link
is
36.5mm.
While
maintaining this setting condition,
loosen set screw @ and adjustsynchronizerbyturning
reflector (black) on the synchronizer until the face end
®of reflector (black) is aligned with the centerline of
cross slotted screw
G).
Tighten set screw
@
after the
adjustment. Then align the red timing mark
@)
with
the graduation "16" by turning the reflector (red).
&\
Switch off the machine.
Red

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23. ADJUSTMENT OF BUTTONHOLE SEWING MACHINE (1669U 200)
1.
Specification (1669U 200)
Stitch type Single needle lockstitch
"Maximum
speed 2,700 SPM
Sewing area
(X
·
Y)
3.0 X 8.0
Feed system lntermitted feed (pulse motor)
Stitch length
0.1
-10.0 mm
No. of needle Option
(21,28,&36 already input)
Max. No. of stitch 10,000 stitches
Clamp lift system Electro-maanetic solenoid
Clamp foot lift 12 mm (17 mm max.)
Shuttle hook Standard hook
Wiper
Standard fittina
Thread trimmer Standard fittinq
Bobbin counter Indicates when to chanqe bobbin
Data memorizinq EEP-ROM
No. of pattern 22 patterns already input.
(memorized) (Only 3 pattern Nos. 10,
11
and 12 of the 25 patterns can be sewn.)
(Additional patterns up to 64 max. can
be
input. Total No.
of stitches 1
O000 max.)
Motor
3 phase induction motor, 400 W
Weiqht Machine head aooroximatelv
51
ka, Control box
11
kq
Electrical ratina Sina
le
phase 100 -115 V 3 ohase 200 -240 V
• Maximum efficient speed
is
determinded upon nature
of
operation and type
of
material being
sewn.
2. Adjustment of closing
Amount
of clamp foot (left and right)
1
B A
•
Adjustment
of closing
Amount
of clamp foot (left and right)
Loosen bolts @and adjust closing amount of left and right clamp foot
by
moving arch clamp lifting plate (lower)
CD
in
the
direction indicated
by
arrow. To decrease dosing
amount,
move
arch clamp
lifting
plate (lower)
in
direction Aand
to
increase
the amount, move
it
in
direction
B.
Note: Closing amount
is
set
to
1mm when the machine
is
shipped from
the
factory.
14

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3. Adjustment of Clamp
Foot
Height
Loosen
set
screw
®
and
adjust height
by
moving
arch
clamp
lifting
plate
CD
up
or down
as
required.
Maximum
clamp
foot
lift
is
17mm
from
the
throat plate surface.
Note: Clamp
toot
lift
is
set
to
12mm when the machine
is
shipped
from the factory.
1
4.
Adjustment of Clamp Foot Spring Tension
Loosen adjusting
nut
(lower)
CD
and adjust spring
tension
by
turning
adjusting
nut
(upper)@. The pressure
on
the
fabric
should
be
as
light
as
possible, while
still
sufficient
to
insure
proper
feeding.
15

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24.
ADJUSTMENT
OF BUTTON SEWING MACHINE (1669U 400)
1. Specification (1669U 400)
Stitch type Single needle lockstitch
·Maximum
speed 2,500 SPM
Sewing area
(X
-Y) 6.5 X 6.5
Feed system lntermitted feed (pulse motor)
Stitch length
0.1
-10.0 mm
Needle 3355-01 (#14)
Applicable size of Outside
diameter:
8.7 -31.8 mm
button Sewinq size:2.5 -6.5 mm
No. of needle Option
(9,
11,13,15,16,18,19,20,22,24,26,&27 already input)
Max. No. of stitch 10,000 stitches
Clamp
lift system Electro-maqnetic solenoid
Clamp foot lift 13 mm
Shuttle hook Standard hook
Wiper
Standard fittinq
Thread trimmer Standard fittinq
Bobbin counter Indicates when to chanqe bobbin
Data memorizinq EEP-ROM
No. of pattern 27 patterns already input.
(memorized) (Additional patterns up to 64 max. can be input. Total No.
of stitches 10 000 max.)
Motor 3 phase induction motor 400 W
Weiaht Machine head aooroximatelv
51
ka
Control box
11
kq
Electrical ratina Sinale ohase 100 -115 V 3 ohase 200 -
240
V
• Maximum efficient speed
is
determinded upon
nature
of
operation
and
type
of material being sewn.
16

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
4.
Adjustment of Button Clamp Height
5.
Adjustment of Button Clamp Spring Pressure
6.
Adjustment of Button Clamp Spreader Adjusting Plate
E
E
q
I.I)
ci
19
• Loosen screw and adjust the height by moving button
clamp arm hook
CD
up or
down
as
required. Maximum
button clamp lift above throat plate surface
is
13mm.
• Loosen adjusting nut (lower)
CD
and
adjust spring
pressure by turning adjusting nut (upper)
®·
The
pressure on the fabric should be
as
light as possible,
while still sufficient to insure proper feeding.
• Loosen adjusting plate screw
CD
and adjust clamp
spreader adjustingplate
®
so that clearance between
adjusting plate
®
and screw @ will be 0.5 -1.0mm
when button is set
in
the button clamp and tighten
adjusting plate screw
CD.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
7. Combination of Throat Plate Needle Hole Bushing and Feed Plate
in
Relation to Distance between Button
Holes.
ct])=~@
I I
'
'
..
1 1
..
@
Distance between button holes
@
mm
Throat plate needle hole bushing PIN Feed plate PIN
418962
(standard) 557131-003 (standard)
2.5 -3.5
418973
(optional) 557131-003 (standard)
41831 0 (optional) 557131-001 (optional)
418962
(standard) 557131-004 (optional)
3.5 -4.5
418973
(optional) 557131-004 (optional)
418310
(optional) 557131-002 (optional)
418962
(standard) 557131-005 (optional)
4.5 -6.5
418973
(optional) 557131-005 (optional)
41831 0 (optional) 557131-003 (standard)
Note: Throat plate needle hole bushing PIN 418973 (1.6
0
needle hole with boss)
Throat plate needle hole bushing PIN 418310 (2.0
0)
20