Brother SC-2000 User manual

Stamp Creator PRO
SERVICE MANUAL
MODEL:SC-2000 Version A

Stamp Creator PRO
SERVICE MANUAL
MODEL: SC-2000

Copyright Brother 1999
All rights reserved.
No part of this publication may be reproduced in any
form or by any means without permission in writing from
the publisher.
Specifications are subject to change without notice.

1
Stamp Creator PRO SC-2000
Mechanical Part
CONTENTS
CHAPTER I SPECIFICATIONS...................................................................................I-1
1. MECHANICAL SPECIFICATIONS................................................................................................I-1
1.1 Overview.........................................................................................................................I-1
1.2 Input Specifications.........................................................................................................I-2
1.3 Display Specifications......................................................................................................I-2
1.4 Printing Specifications.....................................................................................................I-2
1.5 Engraving Stamp Specifications.......................................................................................I-3
1.6 Xenon Unit Specifications................................................................................................I-3
1.7 Ribbon Cassette Specifications........................................................................................I-3
1.8 Magazine Tray Specifications..........................................................................................I-3
1.9 Stamp Specifications.......................................................................................................I-4
1.10 Draft Sheet Specifications................................................................................................I-6
1.11 ID Label Specifications....................................................................................................I-6
CHAPTER II THEORY OF MECHANISM OPERATION.............................................II-1
1. PRINTING MECHANISM.............................................................................................................II-1
1.1 Construction of Thermal Head........................................................................................II-1
1.2 Theory of Printing...........................................................................................................II-1
1.3 Configuration of Character and Graphics........................................................................II-1
2. ENGRAVING STAMP MECHANISM............................................................................................II-2
2.1 Theory of Engraving Stamp............................................................................................II-2
2.2 Positioning the Holder.....................................................................................................II-3
3. FEEDING MECHANISM..............................................................................................................II-4
3.1 Feeding Draft Sheet.......................................................................................................II-4
3.2 Feeding Draft Sheet and ID Label...................................................................................II-5

2
CHAPTER III DISASSEMBLY AND REASSEMBLY.................................................III-1
1. DISASSEMBLING PROCEDURES.............................................................................................III-2
1.1 Disassembly of the I/F Cable and the AC Cord..............................................................III-2
1.2 Disassembly of the Magazine Tray Assy and the Xenon Unit.........................................III-3
1.3 Disassembly of the Ribbon Cassette Assy.....................................................................III-4
1.4 Disassembly of the Main PCB Assy...............................................................................III-5
1.5 Disassembly of the Capacitor Case...............................................................................III-7
1.6 Disassembly of the Body Cover.....................................................................................III-9
1.7 Disassembly of the Main Chassis and the Bottom Cover.............................................III-12
1.8 Disassembly of the Power Supply PCB Assy...............................................................III-15
1.9 Disassembly of the Thermal Head Unit........................................................................III-16
1.10 Disassembly of the Sensor Assys................................................................................III-17
1.11 Disassembly of the Micro Switches..............................................................................III-18
1.12 Disassembly of the Platen Unit Assy............................................................................III-19
1.13 Disassembly of the Presser Unit Assy.........................................................................III-21
1.14 Disassembly of the Head Holder Assy.........................................................................III-26
1.15 Disassembly of the Gears and Pulleys.........................................................................III-28
1.16 Disassembly of the Motor Holder Assy and the Motors................................................III-29
1.17 Disassembly of the Rollers..........................................................................................III-30
1.18 Disassembly of the Label Guide Assy..........................................................................III-31
1.19 Disassembly of the Film Path Assy..............................................................................III-33
1.20 Disassembly of the Drawer Connector.........................................................................III-35
2. REASSEMBLING PROCEDURES............................................................................................III-36
2.1 Reassembly of the Drawer Connector..........................................................................III-36
2.2 Reassembly of the Film Path Assy..............................................................................III-37
2.3 Reassembly of the Label Guide Assy...........................................................................III-42
2.4 Reassembly of the Rollers...........................................................................................III-45
2.5 Reassembly of the Motor Holder Assy and the Motors.................................................III-48
2.6 Reassembly of the Gears and Pulleys.........................................................................III-49
2.7 Reassembly of the Head Holder Assy..........................................................................III-51
2.8 Reassembly of the Presser Unit Assy..........................................................................III-54
2.9 Reassembly of the Platen Unit Assy............................................................................III-61
2.10 Reassembly of the Micro Switches..............................................................................III-63
2.11 Reassembly of the Sensor Assys................................................................................III-64
2.12 Reassembly of the Thermal Head Unit.........................................................................III-65
2.13 Reassembly of the Power Supply PCB Assy................................................................III-66
2.14 Reassembly of the Bottom Cover and the Main Chassis..............................................III-67
2.15 Reassembly of the Body Cover....................................................................................III-69
2.16 Reassembly of the Capacitor Case..............................................................................III-72
2.17 Reassembly of the Main PCB Assy..............................................................................III-74

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2.18 Reassembly of the Ribbon Cassette Assy....................................................................III-77
2.19 Reassembly of the Xenon Unit.....................................................................................III-78
2.20 Reassembly of the Magazine Tray Assy......................................................................III-79
2.21 Reassembly of the AC Cord and the I/F Cable.............................................................III-79
2.22 Lubrication during Reassembly....................................................................................III-80
CHAPTER IV TROUBLESHOOTING........................................................................IV-1
1. GENERALS................................................................................................................................IV-1
2. PRECAUTIONS ON REPAIRING................................................................................................IV-1
3. ACTIONS TO BE TAKEN AFTER REPAIRS...............................................................................IV-1

I - 1
CHAPTER I SPECIFICATIONS
1. MECHANICAL SPECIFICATIONS
1.1 Overview
(1) External view See Fig. 1.1.
(2) Dimensions 470 mm (W) ×238.3 mm (D) ×180.8 mm (H)
(without the magazine tray assy)
(3) Weight Approx. 8 kg
(4) Total weight Approx. 11 kg
(machine and package)
470 mm
238.3 mm
180.8 mm
Fig. 1.1 External Dimensions

I - 2
1.2 Input Specifications
(1) Type of keys Tactile switch
(2) Number of keys 2
(3) Key layout See Fig. 1.2
Fig. 1.2 Control Panel
1.3 Display Specifications
(1) Display method Character type LCD
(2) Number of characters 15 columns ×1 line
(3) Dots CG construction 5 dots ×7 dots + the cursor
(4) Dot size 0.58 mm wide by 0.524 mm high
(5) Dot pitch 0.65 mm wide by 0.594 mm high
1.4 Printing Specifications
(1) Printing type Thermal fusion and printing method by
thermal head
(2) Printing speed 99.2 dots/sec. (4.2 mm/sec.)
(3) Thermal head construction Thin film thermal head 960 dots ×1 dot
Vertical pitch 0.0425 mm (1/600 inch)
Dimensions of a heating element
0.035 mm wide by
0.060 mm high

I - 3
1.5 Engraving Stamp Specifications
(1) Engraving stamp method Light engraving stamp method
(2) Operation load 98 N (10 kgf) or lower
(3) Light source Xenon lamp (xenon unit)
1.6 Xenon Unit Specifications
(1) Light source Xenon lamp
(2) Light emission times 2000 times or more
(3) Construction Xenon tube, reflector, acrylic plate, and glass
plate
(4) Packaged standard xenon unit Yes (1 piece)
1.7 Ribbon Cassette Specifications
(1) Ink color Black
(2) Printing times 150 or more printing surfaces
(1 printing surface includes both an ID label
and a draft sheet.)
(3) Packaged standard ink Yes (1 piece)
ribbon cassette
1.8 Magazine Tray Specifications
(1) Capacity 50 draft sheets
(2) Separation method Separation method by claws
(3) Packaged standard Yes (1 piece)
magazine tray

I - 4
1.9 Stamp Specifications
(1) Types and sizes of stamp
Size Dimensions (mm)
1212 28 ×31
2020 36 ×39
3030 47 ×50
4040 57 ×60
1060 26 ×79
1438 30 ×57
1850 34 ×69
2260 38 ×79
2770 43 ×90
3458 51 ×78
4090 57 ×110
Fig. 1.3 Stamp Types

I - 5
(2) Configuration Grip, skirt, holder, and cap
(The holder consists of printing material,
an absorption sheet, an ink pack, and an
inside plate.)
Skirt
Cap
Grip
Holder
Fig. 1.4 Stamp Configuration
(3) Effective printing area
Size Dimensions (mm)
1212 9.9 ×9.8
2020 18.0 ×18.0
3030 27.2 ×27.1
4040 37.4 ×37.3
1060 7.8 ×57.9
1438 11.9 ×36.2
1850 16.0 ×47.8
2260 19.0 ×56.9
2770 23.8 ×67.1
3458 31.3 ×54.9
4090 37.4 ×86.7
(4) Ink color (for each size) Black, red, and blue
(5) Packaged standard stamp Yes (1438 and 1850: 2 pieces,
2770: 1 piece)

I - 6
1.10 Draft Sheet Specifications
(1) Dimensions 58 mm ×172 mm ×0.1 mm
(2) Material PET film
(3) Packaged standard draft sheet Yes (150 sheets)
Fig. 1.5 Draft Sheet
1.11 ID Label Specifications
(1) Dimensions 58 mm ×170 mm ×0.15 mm
(2) Material White PET film
(with adhesive and a separator on the back)
(3) Type A total of 11 types (1212, 2020, 3030, 4040,
1060, 1438, 1850, 2260, 2770, 3458, and
4090)
(4) Packaged standard ID label Yes (1438 and 1850: 2 labels,
2770: 1 label)

I - 7
Fig. 1.6 ID Label 1438
Fig. 1.7 ID Label 1850
Fig. 1.8 ID Label 2770

II - 1
CHAPTER IITHEORY OF MECHANISM OPERATION
1. PRINTING MECHANISM
1.1 Construction of Thermal Head
The thermal head contains 960 heating elements vertically arranged. The size of
one heating element is 0.035 mm wide by 0.060 mm high, as shown in Fig. 2.1.
40.7925 mm
0.035 mm
0.060 mm
0.0425 mm
Fig. 2.1 Heating Elements of the Thermal Head
1.2 Theory of Printing
During printing operation, the thermal head crimps the ink ribbon and a draft sheet
(or an ID label) on the cylindrical rubber platen. In this state, the CPU selects the
required heating elements out of the 960 heating elements to energize them. When
the energized heating elements are heated, the ink in the ink ribbon is fused, and
the ink is transferred to an adhered draft sheet (or an ID label) to print dots. The ink
ribbon and the draft sheet (or the ID label) are fed to the next printing position
simultaneously at the same speed to start the next printing cycle. By repeating the
printing cycles in this manner, a character and graphics is printed on the surface of
a draft sheet (or an ID label).
1.3 Configuration of Character and Graphics
The driving motor continuously feeds a draft sheet (or an ID label) and the ink
ribbon by 0.0423 mm in 9 ms, during which the CPU heats the thermal head once to
print a character and graphics.

II - 2
2. ENGRAVING STAMP MECHANISM
2.1 Theory of Engraving Stamp
The draft sheet printed with a character and graphics is fed onto the transparent
plate on the light emitting part of the xenon unit. Position the holder on the draft
sheet with the printing material (made of porous resin) facing down, and apply a
load on the holder by closing the engraving stamp cover to cause the xenon lamp to
emit light. As for the draft sheet's area printed with no character or graphics, the
light is directly irradiated on the printing surface. The light heats the carbon
contained in the printing material to thermally fuse the printing material, and the
pressure closes up the holes in the printing material. This manufactures the printing
surface with holes left only on the area with a character and graphics. After
engraving stamp, setting the grip on the holder fills the inside of the holder with the
ink from the ink pack to enable imprinting.
Draft sheet
Stamp holder
Xenon lamp
Fig. 2.2 Stamp Holder Mounting

II - 3
2.2 Positioning the Holder
The holder is positioned at the engraving stamp position by the two interlocked
shutters that open and close back and forth and the triangular projections in the
centers of the shutters. At this time, the six micro switches send ON/OFF signals
according to the shapes of the hollows in the holder, which depend on the size of
the holder, to detect the size of the holder, as shown in Fig. 2.3.
Shutter rear
Shutter front
Holder
Holder
Micro switch
(for stamp size detection)
Triangular hollow in the
holder
Triangular projection of the shutter
Holder
Note: The above shows holder 1850.
Fig. 2.3

II - 4
3. FEED MECHANISM
3.1 Feeding Draft Sheet
The draft sheets, set in the magazine tray assy, are fed one by one from the side
contacting the paper feed roller, and then separated by the separating claws, as
shown in Fig. 2.4.
Magazine tray assy
Paper feed roller
Draft sheet
Separating claws
Fig. 2.4

II - 5
3.2 Feeding Draft Sheet and ID Label
The driving motor rotates each roller via a gear train and the timing belt (MXL belt)
to feed a draft sheet and an ID label, as shown in Fig. 2.5. The feeding position of
the draft sheet is detected by the transparent sensors to control the printing start
position and the engraving stamp position.
Paper feed roller
Main motor
Reflective sensor
Reflective sensor
Paper feed
roller
Transparent sensor
Draft sheet
Paper feed motor
Nip roller
Nip roller
Paper eject rollerDriving roller
Eject roller shaft
(Xenon unit assy)
Fig. 2.5 Feeding Path

III - 1
CHAPTER III DISASSEMBLY AND REASSEMBLY
Precautions on Safety
(1) Disassemble and reassemble the machine on a grounded antistatic sheet.
Touching electronic components such as an LSI with an electrified hand will
break them, as they are easily affected by static electricity.
(2) Wrap the machine in an electrically conductive aluminum sheet before carrying
it.
(3) When using heating tools such as soldering iron, take care not to thermally
break resin components such as a wire, a PCB, and a cover.
(4) Take care not to lose small components, such as a screw and a washer, which
have been removed to replace other components.
(5) Never remove main capacitor charge PCB from the capacitor case since
the PCB may be charged with high voltage.
List of Tightening Torque
Position Screw Qty. Tightening torque
N·cm (kgf·cm)
Paper feed motor Screw, bind M2.6
×
5 249
±
9.8 (5
±
1)
Main motor Screw, bind M3
×
5 258.8
±
9.8 (6
±
1)
Motor holder sub assy Screw, bind M3
×
5 358.8
±
9.8 (6
±
1)
Presser unit assy Screw, pan
(S/P washer) M3
×
6DB 12 117.6
±
9.8 (12
±
1)
Presser unit assy
(front: shutter cover) Screw, pan
(S/P washer) M3
×
6DB 2117.6
±
9.8 (12
±
1)
Thermal head unit Screw, bind M3
×
5 258.8
±
9.8 (6
±
1)
Main chassis Taptite, bind B M3
×
12 678.4
±
9.8 (8
±
1)
Control panel PCB
holder Taptite, bind B M3
×
12 278.4
±
9.8 (8
±
1)
Body cover (rear) Screw, bind B M3
×
12 378.4
±
9.8 (8
±
1)
Body cover (top) Screw, bind M3
×
5 158.8
±
9.8 (6
±
1)
Screw, bind M3
×
8 258.8
±
9.8 (6
±
1)
Main capacitor unit
assy Screw, bind B M3
×
12 478.4
±
9.8 (8
±
1)

III - 2
1. DISASSEMBLY PROCEDURES
1.1 Disassembly of the I/F Cable and the AC Cord
Remove the I/F cable and the AC cord in the back of the machine, as shown in Fig.
3.1.
AC cord
Serial I/F cable
Parallel I/F cable
Fig. 3.1