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Pfaff
Sewing Machine
4874
Pfaff 4874 User Manual
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WIRING FOR CONNECTORS OF MAIN PRINTED CIRCUIT BOARD
3c
Fuse
To Speed reducer
To SPD (LCD P.C.B.)
CN7
(CN6)
CN9
CN12
(CN11)
CN8
CN2
CN5
CN1
CN3
Wiring
CN1
Fr
om
Power Supply
CN2
F
rom
Lighting (Lamp)
CN3
F
rom
Transformer (Out-put Side)
CN5
F
rom
Transformer (In-put Side)
CN7
F
rom
Sensor of the EN P.C.B.
CN8
F
rom
Sewing Motor
CN9
F
rom
Micro Switch For Front Flap
CN12
F
rom
Foot Controller
FUSE
125V 5A 250V 3.15A
Connectors
23
25
Table of Contents
Table of Contents
2
General Directions and Recommendations
4
C.1-2. Mechanical Sewing Disorders
6
G.1-3. Gauge for the after - Sales Service
16
Removing Back Cover
20
Removing Front Cover
21
A-B. Height and Alignment of Cloth Presser Bar
30
Height-Clearance-Angular Position of Lower Looper
34
Clearance of Needle Guards
35
A-B. Timing of Lower Looper
36
Angular Position of Upper Looper
38
Clearance and Timing of Upper Looper to Lower Looper 11
39
Chain Looper Thread Take up Rotary Cam
44
Height of Feed Dog
45
A-B. Moving Cutter and Vertical Feed Timing
46
Adjustment for Differential Feed Unit Operated with Stepping Motor
50
Position of Fixed Cutter and Cutting Width Dial Setting 18
51
Position of Loopers Threads Take up Lever
52
Position of the Stitch Width Finger
53
Lateral and Front Covers Safety Device
54
A-B. Adjustment of Setting Position for En-Sensor and Slit-Plate
56
Adjustment for Stitch Length Unit Operated with Step Motor
58
Timing Adjustment for Top Cover Triangle Thread Guide and Top Cover Hook
59
Adjustment of Threads Take up Lever for Top Cover and Deco Cover
60
Installing of Deco Unit
61
A-B. Adjustment for Deco Unit
62
Cover Hem Stitch Being Pulled
64
Cover Hem Stitch Formation (Narrow & Wide
68
Triple Cover Hem Stitch Formation
69
4
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Pfaff 4874 Specifications
General
Brand
Pfaff
Model
4874
Category
Sewing Machine
Language
English
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