Brother SC-2000 Service 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.
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
1
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
2
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
3
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)
238.3 mm
180.8 mm
470 mm
Fig. 1.1 External Dimensions
I - 1
1.2 Input Specifications
(1) Type of keys Tactile switch
(2) Number of keys 2
(3) Key layout See Fig. 1.2
1.3 Display Specifications
(1) Display method Character type LCD
Fig. 1.2 Control Panel
(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
(2) Printing speed 99.2 dots/sec. (4.2 mm/sec.)
(3) Thermal head construction Thin film thermal head 960 dots × 1 dot
thermal head
Vertical pitch 0.0425 mm (1/600 inch)
Dimensions of a heating element
0.035 mm wide by
0.060 mm high
I - 2
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
(4) Packaged standard xenon unit Yes (1 piece)
1.7 Ribbon Cassette Specifications
(1) Ink color Black
plate
(2) Printing times 150 or more printing surfaces
(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
(1 printing surface includes both an ID label
and a draft sheet.)
I - 3
1.9 Stamp Specifications
(1) Types and sizes of stamp
Size Dimensions (mm)
1212
2020
3030
4040
1060
1438
1850
2260
2770
3458
4090
28 × 31
36 × 39
47 × 50
57 × 60
26 × 79
30 × 57
34 × 69
38 × 79
43 × 90
51 × 78
57 × 110
Fig. 1.3 Stamp Types
I - 4
(2) Configuration Grip, skirt, holder, and cap
(The holder consists of printing material,
an absorption sheet, an ink pack, and an
inside plate.)
Grip
Skirt
Holder
Cap
Fig. 1.4 Stamp Configuration
(3) Effective printing area
Size Dimensions (mm)
1212
2020
3030
4040
1060
1438
1850
2260
2770
3458
4090
9.9 × 9.8
18.0 × 18.0
27.2 × 27.1
37.4 × 37.3
7.8 × 57.9
11.9 × 36.2
16.0 × 47.8
19.0 × 56.9
23.8 × 67.1
31.3 × 54.9
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 - 5
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)
1.11 ID Label Specifications
(1) Dimensions 58 mm × 170 mm × 0.15 mm
(2) Material White PET film
(3) Type A total of 11 types (1212, 2020, 3030, 4040,
(4) Packaged standard ID label Yes (1438 and 1850: 2 labels,
Fig. 1.5 Draft Sheet
(with adhesive and a separator on the back)
1060, 1438, 1850, 2260, 2770, 3458, and
4090)
2770: 1 label)
I - 6
Fig. 1.6 ID Label 1438
Fig. 1.7 ID Label 1850
Fig. 1.8 ID Label 2770
I - 7
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.
0.0425 mm
40.7925 mm
0.035 mm
0.060 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 - 1
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 - 2
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
Triangular hollow in the
holder
Triangular projection of the shutter
Note: The above shows holder 1850.
Holder
Micro switch
(for stamp size detection)
Fig. 2.3
Holder
II - 3
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
Draft sheet
Paper feed roller
Separating claws
Fig. 2.4
II - 4
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
Reflective sensor
Nip roller
Paper feed
roller
Paper feed motor
Reflective sensor
Transparent sensor
Paper eject rollerDriving roller
Draft sheet
Main motor
Nip roller
Eject roller shaft
(Xenon unit assy)
Fig. 2.5 Feeding Path
II - 5
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
Main motor
Motor holder sub assy
Presser unit assy Screw, pan
Presser unit assy
(front: shutter cover)
Thermal head unit
Main chassis
Control panel PCB
holder
Body cover (rear)
Body cover (top)
Main capacitor unit
assy
Screw, bind M2.6 × 5
Screw, bind M3 × 5
Screw, bind M3 × 5
(S/P washer) M3 × 6DB
Screw, pan
(S/P washer) M3 × 6DB
Screw, bind M3 × 5
Taptite, bind B M3 × 12
Taptite, bind B M3 × 12
Screw, bind B M3 × 12
Screw, bind M3 × 5
Screw, bind M3 × 8
Screw, bind B M3 × 12
2
2
3
12
2
2
6
2
3
1
2
4
49 ± 9.8 (5 ± 1)
58.8 ± 9.8 (6 ± 1)
58.8 ± 9.8 (6 ± 1)
117.6 ± 9.8 (12 ± 1)
117.6 ± 9.8 (12 ± 1)
58.8 ± 9.8 (6 ± 1)
78.4 ± 9.8 (8 ± 1)
78.4 ± 9.8 (8 ± 1)
78.4 ± 9.8 (8 ± 1)
58.8 ± 9.8 (6 ± 1)
58.8 ± 9.8 (6 ± 1)
78.4 ± 9.8 (8 ± 1)
III - 1
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.
Parallel I/F cable
Serial I/F cable
AC cord
Fig. 3.1
III - 2
1.2 Disassembly of the Magazine Tray Assy and the Xenon Unit
Remove the magazine tray assy by lifting it diagonally.
While sliding the slide lever on the side of the machine upwards, pull out the xenon
unit, as shown in Fig. 3.2.
Magazine tray assy
Body cover
Slide lever
Xenon unit
Fig. 3.2
III - 3
1.3 Disassembly of the Ribbon Cassette Assy
Press the open button on top of the machine to open the cassette cover, and
remove the ribbon cassette assy, as shown in Figs. 3.3 and 3.4.
Cassette cover
Body cover
Fig. 3.3
Open button
Ribbon cassette assy
Body cover
Fig. 3.4
III - 4
1.4 Disassembly of the Main PCB Assy
Press part A of the cassette cover to close it, as shown in Fig. 3.5.
Cassette cover
Body cover
Fig. 3.5
Turn the machine over and remove the four screws to remove the main PCB assy,
as shown in Fig. 3.6.
Screws
A
Screws
Main PCB bottom plate
Body cover
Fig. 3.6
III - 5
Pull out the connectors from the main PCB assy.
Remove the screw to remove the ground wire from the main chassis, as shown in
Fig. 3.7.
Note: Put on a static control wrist band before handling PCBs.
Screw
Ground wireMain chassis
Fig. 3.7
Main PCB assy
Main PCB
bottom plate
Remove the five screws to remove the main PCB assy from the main PCB bottom
plate, as shown in Fig. 3.8.
Screws
Screws
Main PCB
Main PCB assy
Fig. 3.8
bottom plate
III - 6
1.5 Disassembly of the Capacitor Case
Remove the shield plate and pull out the connector of the power supply harness
from the power supply PCB assy, as shown in Fig. 3.9.
Body cover
Shield plate
Power supply PCB assy
Power supply harness
Fig. 3.9
III - 7
Remove the four screws to remove the capacitor case from the bottom cover.
Remove the capacitor harness from the connector of the capacitor case, and
remove the screw to remove the ground wire, as shown in Fig. 3.10.
Screws
Capacitor case
Screws
Capacitor harness
Ground wire
Body cover
Bottom cover
Fig. 3.10
III - 8
1.6 Disassembly of the Body Cover
Turn the machine over with the right side up, open the cassette cover, and remove
the two screws to remove the cassette cover, as shown in Fig. 3.11.
Cassette cover
Body cover
Head holder assy
Screws
Fig. 3.11
Close the head holder assy and remove the two screws, as shown in Fig. 3.12.
Screws
Head holder assy
Fig. 3.12
III - 9
Remove the eject cover and the screw.
Remove the slide lever, as shown in Fig. 3.13.
Eject cover
Screw
Fig. 3.13
Slide lever
Remove the three screws in the back of the cover, and remove the body cover by
lifting it, as shown in Figs. 3.14 and 3.15.
Screws
Fig. 3.14
III - 10
Body cover
Bottom cover
Fig. 3.15
Remove the two screws to remove the control panel PCB holder from the body
cover. Remove the screw from the control panel PCB holder to remove the control
panel PCB assy, as shown in Fig. 3.16.
Screw
Control panel
PCB assy
Control panel PCB holder
Screws
Body cover
Fig. 3.16
III - 11
1.7 Disassembly of the Main Chassis and the Bottom Cover
Press the open button to open the head holder assy, as shown in Fig. 3.17.
Head holder assy
Open button
Fig. 3.17
Remove the six screws to remove the main chassis from the bottom cover, and
remove the two cores, as shown in Fig. 3.18.
Screws
Screws
Screws
Main chassis
Bottom cover
Fig. 3.18
III - 12
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