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EasyCoder 601 XP

UBI EasyCoder 601 XP Service Manual

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Page 1
UBI EasyCoder 601 XP – Service Manual Ed. 1
1
Chapter 0 Introduction
Chapter 0
0. Introduction
0.1 Contents
0. Introduction
0.3 Notices and Approvals ....................................................................5
1. Models and Options
1.1 Identification ...................................................................................7
1.2 Specifications ................................................................................11
1.3 Measures ....................................................................................... 13
2. Front and Keyboard
2.1 Front .............................................................................................14
2.2 Keyboard/Display .........................................................................14
2.3 Components ..................................................................................17
2.4 Schematics ....................................................................................18
3. Hatches and Doors
3.1 Right-Hand Door .......................................................................... 19
3.2 Front Hatch ................................................................................... 20
3.3 Left-Hand Cover ........................................................................... 21
4. Chassis
4.1 Description....................................................................................22
4.2 Centre-Line Wall...........................................................................22
4.3 Bottom Plate .................................................................................23
4.4 Rear Plate...................................................................................... 23
5. Paper Supply
5.1 Internal Supply .............................................................................. 25
5.2 External Supply.............................................................................27
6. Label Slack Absorber
6.1 Description....................................................................................30
6.2 Dismantling...................................................................................31
7. Transfer Ribbon Mechanism
7.1 Description....................................................................................32
7.2 Ribbon Unwind Unit .....................................................................33
7.3 Ribbon Rewind Unit .....................................................................35
7.4 Ribbon End Sensor........................................................................37
8. Print Unit
8.1 Description....................................................................................39
8.2 Pressing Roller ..............................................................................42
8.3 Stepper Motor ............................................................................... 43
8.4 Belts.............................................................................................. 46
8.5 Belt Adjustments........................................................................... 48
8.6 Label Stop Sensor .........................................................................50
8.7 Printhead .......................................................................................56
8.8 Headlift Sensor..............................................................................61
8.9 Headlift Mechanism ......................................................................63
8.10 Ribbon Return Roller .................................................................... 66
8.11 Paper Feed Principles ....................................................................68
9. Backing Paper Rewind Kit
9.1 Description....................................................................................70
9.2 Main Parts ..................................................................................... 71
9.3 Paper Rewind Unit ........................................................................72
UBI EasyCoder 601 XP Service Manual Edition 1, February 1998 Part No. 1-960431-00
Page 2
UBI EasyCoder 601 XP – Service Manual Ed. 1
2
Chapter 0 Introduction
10. Label-Taken Sensor
10.1 Description....................................................................................73
10.2 Installation ....................................................................................74
10.3 Adjustments .................................................................................. 76
11. Paper Cutter
11.1 Description....................................................................................77
11.2 Control ..........................................................................................78
11.3 Cleaning........................................................................................ 78
11.4 Installation ....................................................................................79
11.5 Spring Replacement ...................................................................... 80
12. Ribbon Low Sensor
12.1 Description....................................................................................81
12.2 Installation ....................................................................................82
13. Electronics Compartment
13.1 Introduction...................................................................................83
13.2 Accessing the Electronics Compartment........................................83
13.3 Main Parts ..................................................................................... 84
14. Power Supply
14.1 Description....................................................................................85
14.2 Components ..................................................................................87
14.3 Schematics ....................................................................................89
15. CPU Board
15.1 Description....................................................................................91
15.2 Circuits and Straps ........................................................................92
15.3 Connectors ....................................................................................96
15.4 Special Devices .............................................................................97
15.5 Test Points .................................................................................. 101
15.6 Startup.........................................................................................101
15.7 Components ................................................................................ 103
15.8 Schematics .................................................................................. 104
16. Interfaces
16.1 Introduction................................................................................. 111
16.2 Serial Communication Port "uart1:" ............................................ 112
16.3 Parallel Interface "centronics:" .................................................... 113
16.4 Industrial Interface Board ............................................................117
16.5 Serial Interface Board.................................................................. 129
17. Trouble Shooting
17.1 Diagnosing the Printer................................................................. 131
17.2 No Reaction at Power Up ............................................................133
17.3 Printer Stops Working after Startup .............................................134
17.4 CPU Board Failures ....................................................................135
17.5 Power Supply Unit Failures......................................................... 136
17.6 Console Errors ............................................................................ 137
17.7 Error Messages............................................................................138
17.8 No Communication (general) ...................................................... 139
17.9 No Serial Communication ........................................................... 140
17.10 No Parallel Communication ........................................................141
17.11 Sensor Malfunctions....................................................................142
- Label Stop Sensor (LSS) ...........................................................142
- Headlift Sensor ......................................................................... 142
- Ribbon End Sensor ................................................................... 143
- Ribbon Low Sensor .................................................................. 143
- Label Taken Sensor (LTS) ........................................................ 144
0.1 Contents, cont'd.
Page 3
UBI EasyCoder 601 XP – Service Manual Ed. 1
3
Chapter 0 Introduction
0.1 Contents, cont'd.
17. Troubleshooting, cont'd.
17.12 Printing Troubles.........................................................................145
- No printout at all ....................................................................... 145
- Overall weak printout................................................................ 146
- Weaker printout on one side...................................................... 146
- Overall too dark printout ........................................................... 146
- Weak or missing printout of some dots ..................................... 147
- Unexpected black printout.........................................................147
- Only first part of label printer ....................................................147
- Paper feed does not work properly ............................................148
17.13 Transfer Ribbon Troubles............................................................149
- Transfer ribbon gets wrinkled....................................................149
- Transfer ribbon breaks .............................................................. 149
17.14 Rewind Troubles .........................................................................150
17.15 Cutter Troubles ........................................................................... 151
17.16 Memory Card Troubles ............................................................... 152
Appendix 1
UBI Shell 4.1 Overview ......................................................................... 153
EasyCoder 601 XP: Setup Mode Overview, Part 1 .................................154
EasyCoder 601 XP: Setup Mode Overview, Part 2 .................................155
Appendix 2
Measuring the Break Torque .................................................................. 156
Information in this manual is subject to change without prior notice and does not represent a commitment on the part of Intermec Printer AB. © Copyright Intermec PTC AB 1998. All rights reserved. Published in Sweden.
EasyCoder, Fingerprint, LabelShop, and UBI are trademarks of Intermec Technologies Corp. Centronics is a registered trademark of Centronics Data Computer Corp. Microsoft is a registered trademark of Microsoft Corporation. Torx is a registered trademark of Camcar Division of Textron Inc. TrueDoc is a trademark of Bitstream, Inc. TrueType is a trademark of Apple Computer Inc. Unicode is a trademark of Unicode Inc. Windows is a trademark of Microsoft Corporation.
Page 4
UBI EasyCoder 601 XP – Service Manual Ed. 1
4
Chapter 0 Introduction
This Service Manual is intended to facilitate installation, trouble­shooting and repair of the UBI EasyCoder 601 XP in the version delivered at the date of publishing. Thus, all information on the UBI Fingerprint firmware is based on version 7.11. The on-going product improvement can be followed in the Printer Technical Bulletins from Intermec PTC AB.
This Service Manual is supplemented by the following publica­tions, which the service technician also should keep easily avail­able:
• UBI EasyCoder 601 XP; User's Guide (multilingual)
• UBI EasyCoder 601 XP; Installation & Operation manual
• UBI EasyCoder 601 XP; Spare Parts Catalogue
• UBI EasyCoder 601 XP; Installation Instructions (for various options)
• UBI Direct Protocol ≥ 7.11; Programmer's Guide
• UBI Fingerprint ≥ 7.11; Programmer's Guide
• UBI Fingerprint ≥ 7.11; Reference Manual
Please note that the operations described in this manual only should be carried out by skilled and authorized personnel with proper training and full understanding of written English. The printers contain wires and circuits with up to 380V, which implies the risk of electrical shock. Moving parts may also cause harm, if incor­rectly manipulated.
It is assumed that the reader possesses reasonable skills in mechan­ics and electronics and is familiar with the UBI Fingerprint pro­gramming language and its related standard application programs. It is also assumed that the reader has access to the standard tools of an electronics workshop.
0.2 Preface
Page 5
UBI EasyCoder 601 XP – Service Manual Ed. 1
5
Chapter 0 Introduction
FCC Notice United States of America
WARNING:
This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance with the instructions manual, may cause interference to radio communications. It has been tested and found to comply with the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference.
DOC Notice Canada
Canadian Dept. of Communication
REGULATIONS COMPLIANCE
(DOC-A)
This digital apparatus does not exceed the class A limits for radio noise emissions from a digital apparatus as set out in the radio interference regulations of the Canadian Department of Communication.
✳ ✳ ✳
Ministère des Communications du Canada
CONFORMITE DE REGLEMENTS
(DOC-A)
Le présent appareil numérique n´émet pas de bruits radio-électriques dépassant les limites applicables aux appareils numériques de classe A prescrites dans le règlement sur brouillage radioélectrique édicté par le Ministère des Communications du Canada.
EU Standard EN 55022 (The European Union)
WARNING:
This is a Class A ITE product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.
0.3 Notices and Approvals
Page 6
UBI EasyCoder 601 XP – Service Manual Ed. 1
6
Chapter 0 Introduction
0.3 Notices and Approvals, cont'd.
DECLARATION OF CONFORMITY
We,
Intermec Printer AB
Idrottsvägen 10
Box 123
S-431 22 Mölndal
Sweden
declare under our sole responsibility1 that the product
EasyCoder 601 XP
to which this declaration relates
is in conformity with the following standards
Electrical Safety: EN 60950
EMC Emissions: EN 50081-1:92
(EN 55022:94, class B, EN 61000-3-2:95)
EMC Immunity: EN 50082-2:95
(EN 61000-4-2:95; EN 61000-4-3:96; ENV 50204:95;
EN 61000-4-4:95; EN 61000-4-6:96)
following the provisions of Directives
89/336/EEC and 73/23/EEC
Mölndal 1998-02-12
...................................................................
Hans Lindén
President
1
/. Intermec assumes no responsibility as regards fulfilling the CE Directive if the printer is
handled, modified or installed in other manners than those described in the manuals.
Page 7
UBI EasyCoder 601 XP – Service Manual Ed. 1
7
Chapter 1 Models and Options
Presently, the EasyCoder 601 XP only comes in one main model; a combined direct thermal/thermal transfer printer with a setup keyboard and a 12 dots/mm printhead.
The printer can use 100 – 240 V AC, 50 – 60 Hz mains supply. There is no voltage switch-over.
The machine sign on the printer's rear plate contains type, part number, serial number, and signs of approval.
Ready
Error
Power
EasyCoder 601 XP
Print
3
6
89
.
7
Pause
Setup
Feed
Enter
2
1
0
C
5
4
F3 F4
F5
F1
F2
Shift
Chapter 1
1. Models and Options
1.1 Identification
Page 8
UBI EasyCoder 601 XP – Service Manual Ed. 1
8
Chapter 1 Models and Options
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The EasyCoder 601 XP can be fitted with a number of built-in options:
• Paper Cutter (see chapter 11)
• Label-Taken Sensor (see chapter 10)
• Backing Paper Rewind Unit (see chapter 9)
• Paper Roll Retainer (see chapter 5)
• Fan-Fold Guides Kit (see chapter 5)
• Ribbon Low Sensor (see chapter 12)
1.1 Identification, cont'd.
Paper Cutter
Label-Taken Sensor
Backing Paper Rewind Unit
Fan-Fold Guides
Ribbon Low Sensor
Page 9
UBI EasyCoder 601 XP – Service Manual Ed. 1
9
Chapter 1 Models and Options
The printer is – as standard – provided with one serial RS 232C port and one parallel Centronics port. In addition, one extra interface board can be fitted, see chapter 16.
Finally, you may want to inspect the electronics compartment. To do so, carefully follow the instructions in chapter 13.
CAUTION! Always turn off the power and remove the power cord before opening the cover over the electronics compart­ment! Dangerous voltage!
In the electronics compartment, check:
• Type of CPU board?
- Check number of Flash SIMMs.
- Check number and size of DRAM SIMMs.
• Any optional interface board fitted?
- Check type, straps and optional circuits.
Refer to chapters 15 – 16 for more information.
Serial Port
RS 232C
Parallel Port
Centronics
Provision for
one interface board
1.1 Identification, cont'd.
Page 10
UBI EasyCoder 601 XP – Service Manual Ed. 1
10
Chapter 1 Models and Options
If the printer is working and possible startup program can be interrupted, the type of program in the printer can be identified. Connect printer and computer, open a suitable communication program, and start up the printer in the UBI Fingerprint's immediate mode. The instruction FILES allows you to check what files the various parts of the printer's memory contain. The statements FONTS and IMAGES can be used for the same purpose regarding fonts and images. Use the VERSION$ function to check version of the UBI Fingerprint firmware.
You can read the setup in the Setup Mode or by means of UBI Shell, which also allows you to print test label #5 containing the present setup values. To enter UBI Shell if a custom-made autoexec-file prevents access, lift the printhead and press any key on the printer's keyboard (except the <Shift> key), then turn on the power while continuing to press the key. When the UBI Shell countdown begins, release the key and press <Enter> to start UBI Shell. Do not forget to lower the printhead if you want to print e.g. test labels. Refer to the Installation & Operation manual and to Appendix 1 in this Service Manual for more information on the Setup Mode and the UBI Shell startup program.
If the printer does not work, you may need to interview the user. By now, you should have a fairly good idea what kind of printer you
will be working with. Compare with the list of standard features and options on next page.
1.1 Identification, cont'd.
Page 11
UBI EasyCoder 601 XP – Service Manual Ed. 1
11
Chapter 1 Models and Options
1.2 Specifications
Printing:
Print Technique Direct Thermal & Thermal Transfer Printhead Resolution 12 dots/mm (304.8 dots/inch)
Print Speed (variable) 100 – 225 mm/sec (4 – 8.85"/sec) Print Width (max) 165.3 mm (6.49") Media Width (max/min 168 mm (6.61")/25.4 mm (1.00") Internal Paper Roll Diameter (max) 205 mm (8") Paper Roll Core Diameter 38 – 40 mm (1.5"), with adapter 76 mm (3") Ribbon Length (max) 450 metres (1475 feet) Ribbon Width (max) 166 mm (6.54") Print Directions 4
Modes of Operation
Tear Off Yes Peel Off Optional With internal rewinder Cut Off Optional With cutter
Firmware
Operating System UBI Fingerprint 7.11 incl. UBI Direct Protocol Smooth Fonts TrueDoc and TrueType fonts Built-in scalable fonts (std) 15 UNICODE Latin fonts Built-in bar code symbologies (std) 39 Startup Program (std) UBI Shell v. 4.1
Physical Measures
Dimensions (W x D x H) 335 x 482 x 238 mm (13.1 x 19.0 x 9.4") Weight (excluding media & options) 15 kgs (33 lbs) Ambient Operating Temperature +5°C – +40° C (+41°F – +104° F) Humidity 20 – 80% non-condensing
Electronics
Microprocessor 32 bit RISC On-board Flash SIMMs 1 – 3 (2 Mbytes each) Std. 1 x 2 Mbytes On-board DRAM SIMMs 1 – 2 (4 Mbytes each) Std. 1 x 4 Mbytes Real-Time Clock Yes 10+ years life
Power Supply
Mains Voltage >90 – <264 V AC, 45 – 65 Hz PFC Regulation IEC 61000-3-2 Maximum Power Consumption Continuous 175W; Peek ≈ 400W
Page 12
UBI EasyCoder 601 XP – Service Manual Ed. 1
12
Chapter 1 Models and Options
Sensors:
Label Gap/Black Mark/Out of Paper Yes Out of Ribbon Yes Printhead Lifted Yes Ribbon Low Option Label Taken Option
Controls
Control Lamps 3 Display 2 x 16 character LCD w. background light Keyboard 23 keys membrane switch type Beeper Yes
Data Interfaces
Serial 1 x RS 232C Parallel 1 x Centronics Parallel Cutter Yes Bar Code Wand Yes For setup Electronic Keys 1 – 2 Future option Optional Interface Boards 1 Various types Memory Card Adapter 1 Flash or SRAM cards
Accessories
Automatic Paper Cutter Option Backing Paper Rewind Unit Option (factory installed only) For peel-off operation Fan-Fold Guides Kit Option For external supply RS 232C Cable Option Centronics Cable Option EasySet Bar Code Wand Option For quick setup Serial Interface Board Option Industrial Interface Board Option External Alphanumeric Keyboard Option MS Windows 3.11 Printer Driver Standard Excl. cable MS Windows 95 Printer Driver Standard Excl. cable Flash Memory Cards Option Electronic Keys Option
1.2 Specifications, cont'd.
Page 13
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 1 Models and Options
1.3 Measures
An optional paper cutter increases the printer's total length by 28 mm (1.1").
At least 90 mm (3.5") of free space behind the printer is required for the connectors,
and for inserting and removing a memory card.
259 mm (10.20")
238 mm
(9.37")
R
323 m
m
(12.72")
168 mm (6.61")135.4 mm (5.33")
335 mm (13.18")
68.8 mm (2.71")
Dot No. 0
(8 dots/mm printhead
in right-hand position)
79 mm
(3.11")
363 mm (14.29")
481.5 mm (18.96")
R 139 m
m
(5.47")
20 mm (0.79")
20 mm (0.79")
30 mm (1.18")
186 mm
(7.32")
12 mm (0.47")
38 mm (1.50")
Paper slot
Paper slot
Ready
Error
Power
EasyCoder 601 XP
Print
3
6
89
.
7
Pause Setup
Feed Enter
2
1
0 C
54
F3 F4
F5
F1
F2
Shift
Page 14
UBI EasyCoder 601 XP – Service Manual Ed. 1
14
Chapter 2 Front and Keyboard
Ready
Error
Po
w
er
EasyCoder 601 XP
Print
3
6
8
9
.
7
Pause
S
etup
Feed
Enter
2
1
0
C
5
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F3 F
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Chapter 2
2. Front and Keyboard
The moulded front part is attached to the centre-line wall by means of four #T20 screws and to the bottom plate by two #T20 screws. The front moulding is provided with holes for mounting a cutter connector (4-pin female DIN-type) and a slot, that in other printer models using the same front, gives access to a memory card adapter.
Note that the memory card adapter in EasyCoder 601 XP is fitted on the CPU board and is accessible through a slot in the rear plate!
At the top part of the front moulding, there is a cavity for the keyboard/display assy. This assembly is affixed by means of two 2 mm hexagon grub screws underneath the keyboard part of the front moulding.
The keyboard/display assy. is connected to P37 at the front of the CPU board via a 10-p flat cable. This cable must be disconnected before the keyboard/display can be removed.
The keyboard/display must be manipulated carefully when it is lifted out of its cavity. Do not use any force! If the assembly seems to be stuck, open the right-hand door and remove the left-hand cover to check that the grub screws do not interfere with the brackets.
We also recommend you to remove the left-hand cover before you start to fit the keyboard/display assy. back into the front moulding, since it makes it easier to align the brackets with the grub screws.
2.1 Front
Keyboard/Display assy.
Provision for
Cutter Connector
Front Moulding
Not Used!
2.2 Keyboard/Display
Page 15
UBI EasyCoder 601 XP – Service Manual Ed. 1
15
Chapter 2 Front and Keyboard
The keyboard/display assy. consists of a plate with two brackets, a self-adhesive membrane switch keyboard, an self-adhesive over­lay, and a console pcb. The membrane switch keyboard is con­nected to P2 on the console pcb. via a semi-transparent cable running through a slot in the plate.
Keyboard Overlay
The keyboard overlay is self-adhesive with a non-permanent adhesive, to allow easy replacement. Custom-made overlays could also be printed and used to replace the standard overlays for customized applications or in areas, where the English text is not acceptable. Pulling away an overlay and replacing it with another is a simple operation that the customer easily can perform himself. Use isopropyl alcohol to remove any adhesive residue.
Keyboard
The keyboard is of membrane switch type and is glued to the keyboard plate. There are 54 switches, but only 23 of these are used in EasyCoder 601 XP. One switch is a Shift key, that provides a dual functionality to each of the other keys. A resistor ladder gives different voltages from each line and column on the keyboard so the slave processor on the console pcb can decode signals from the various switches (keys) by means of an A/D converter.
Keyboard Plate
The keyboard plate keeps the assembly together and to affix it in the cavity of the front moulding. There are one slot for the display and another for the cable running from the membrane-switch keyboard to the console pcb. Two brackets at the lower edge are used to connect the plate to the front moulding using two 2 mm hexagon grub screws.
2.2 Keyboard/Display,
cont'd.
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EasyCoder 601 XP
P
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5
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hift
Overlay
Membrane-switch Keyboard
Keyboard Plate
Console pcb.
Page 16
UBI EasyCoder 601 XP – Service Manual Ed. 1
16
Chapter 2 Front and Keyboard
Console pcb
The console pcb manages the keyboard, the display, two of the three LED control lamps, and the beeper by means of a slave processor. The communication to and from the CPU board goes via an I2C bus on a 10-p flat cable. This cable is permanently affixed to the console pcb and connected to P37 a the front end of the CPU board.
The display is a LCD display with background light. It has 2 x 16 character with a 5 x 7 dots matrix. 8 characters are programmable. There is no display contrast adjustment.
The beeper has a frequency between 104 and 9.999 Hz. It is used to acknowledge when a key is pressed and to produce various audible signals. The key-acknowledge signal can be controlled by the UBI Fingerprint instruction KEY BEEP, whereas other signals are controlled using the instructions BEEP and SOUND.
The left-hand LED control lamp (marked “Power”) shines green when the power is on. Power on is also indicated by the display's background light. The other two LEDs are programmable using the UBI Fingerprint instructions LED ON and LED OFF. The centre LED is green and the right-hand is red. The right-hand LED (marked “Error”) is usually used to indicate that an error has occurred.
Power On LED
(green)
Error LED
(red)
Ready LED
(green)
LCD Display
Beeper
Slave Processor
Keyboard Connection
Cable to CPU Board
2.2 Keyboard/Display,
cont'd.
Page 17
UBI EasyCoder 601 XP – Service Manual Ed. 1
17
Chapter 2 Front and Keyboard
2.3 Components
1-971604-01 Console pcb.
D2
D3D4
DISPLAY
1-971704-01
Component Side
Soldering Side
B1
C1
C2
C3
C4C5C6C7C8
C9
C10
C11
C12
C13
C14
C15
C16
D1
IC1
IC2
IC3
P1
P2
R1R2 R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
X1
1-971604-01 P01
P1
P1
Test Points:
+5V C14 Lower soldering GND C14 Upper soldering
Page 18
UBI EasyCoder 601 XP – Service Manual Ed. 1
18
Chapter 2 Front and Keyboard
2.4 Schematics
1-971604-01 Console pcb.
VCC
VCC
GND
PB0 PB1 PB2 PB3 PB4 PB5 PB6/ATIn PB7/ATOut
PC0/Ain PC1/Tin/Ain PC2/Sin/Ain PC3/Sout/Ain PC4/SCK/Ain
Ain/PA0 Ain/PA1 Ain/PA2 Ain/PA3 Ain/PA4 Ain/PA5 Ain/PA6 Ain/PA7
NMI
RESET
OSCout
OSCin
TEST
GNDGND
GND
D0D1D2D3D4D5D6
D7
VCC GND
VDISP R/W E RS
AB
CA
VCC
CA
VCC
GND
GND
GND
GND
PRE D CLK CLR
Q Q
VCC
PRE D CLK CLR
Q Q
GND
VCC
GND
VCC
CA
GND
GND GND GND GND
VCC
GND
VCC
GND
GND
VCC
VCC
VCC
GND
1 2 4 5 6 7 8 9
28 27 26 25 24
10 13 14 15 16 17 18 19
23 22
21 20
3
1
3 5 6 4
789
1011121314
2
15 16
1 2 3 4 5 6 7 8 9
10
216
5
1
3
2
4
43
8
9
13
11
12
1065
89
1 2
1 2 3 4 5 6 7 8 9
10111213141516
Beeper
ST6265
IC1
X1
8MHz
C3C2
DISPLAYDISPLAY
P1
RED
D3
GREEN
D2
R1
R2
C1
74HC05
IC3A
74HC74
IC2A
R9
74HC05
IC3B
74HC74
IC2B
74HC05
IC3C
R8
R4
74HC05
IC3D
B1
R5
R3
GREEN
D4
C12
C13 C14 C15
R10
D1
R21R23R25
R20R22R24
C10
C9
C7
C8
C5
C6
C4
R26
R17
R16
R15
R14
R13
R12
R18
R11
KEYBOARD
P2
R19
R7R6
R27
R28
C16
C11
R29
INT
SCL
SDA
RESET
Page 19
UBI EasyCoder 601 XP – Service Manual Ed. 1
19
Chapter 3 Hatches and Doors
IM
PORTANT PRINTHEAD AND RIBBON INFORM
ATION
HEAD CLEANING
The use of any thermal transfer ribbons, other than those supplied by UBI, will invalidate
the printhead warranty.
UBI thermal transfer ribbons are engineered specifically for this printhead.
The quality of thermal and thermal transfer media supplies in this printer is also of great importance
for the quality of printing bar codes and a long life of the printhead. UBI has carefully matched the
paper we recommend/provide to the needs of this printer. We therefore strongly advise of using
only UBI recommended/provided supplies to ensure a high quality printing.
For optimum performance,
the thermal printhead requires
cleaning on a regular basis.
For cleaning information, see
the User's Manual.
0
4
0
,
5
0
1
,
6
0
TEAR-OFF PEEL-OFF
Chapter 3
3. Hatches and Doors
3.1 Right-Hand Door
The right-hand door gives access to:
• The paper supply
• The ribbon supply
• The print mechanism The right-hand door is fitted to the bottom plate by means of two
hinges that allow the door to be swung down 180˚ to a vertical position. The door is kept shut by means of a magnetic lock. The door can easily be removed from the hinges by pushing it forward until the snap-lock at the rear hinge becomes disengaged.
At the inside of the door, there is a label showing how to load the paper and the transfer ribbon.
The hinges can be adjusted by means of the two pairs of #T10 Torx screws visible on the outside. Possibly, the other parts of the hinges, which are fitted to the bottom plate, may require adjustment too. Shut the door, loosen the screws slightly and align the door with the front moulding. Tighten the screws and check that the door runs freely and is kept shut by the magnetic lock.
Magnetic Lock
Label
Hinges
Page 20
UBI EasyCoder 601 XP – Service Manual Ed. 1
20
Chapter 3 Hatches and Doors
The front hatch gives access to:
• The front part of the print mechanism
• The paper cutter connector
• The optional label-taken sensor The front hatch is fitted to the bottom plate by means of two hinges
of the same type as those of the right-hand door. The front hatch is kept shut by a snap-lock and can be swung down almost to a vertical position. The hatch can be removed from its hinges by pushing it to the left until the snap-lock on the right-hand hinge disengages.
The front hatch can be replaced by an optional paper cutter unit, see chapter 11.
Alignment is performed in the same way as the right-hand door, see previous page.
The front hatch can be removed by pushing it to the left when open.
3.2 Front Hatch
Ready
Error
Power
EasyCoder 601 XP
Print
3
6
8
9
.
7
Pause
Setup
Feed
Enter
2
1
0
C
5
4
F3
F4
F5
F1
F2
Shift
Page 21
UBI EasyCoder 601 XP – Service Manual Ed. 1
21
Chapter 3 Hatches and Doors
The left-hand cover gives access to:
• The electronics incl. CPU board, mains connection, power supply, Centronics interface pcb, and any optional interface pcb.
• The motors, belts and pulleys of the paper feed, ribbon feed and the optional rewind unit.
The left-hand cover plate is fitted to the printer’s frame by means of a total of eight #T10 Torx screws; four along the lower edge and another four along the top.
CAUTION!
The electronic compartment contains wires and com­ponents with dangerous voltage (up to 380V). Make sure that the printer is turned off and the power cord is disconnected, before the left-hand cover is re­moved.
After having disconnected the power cord, open the right-hand door. Using a #T10 Torx screwdriver, remove the four screws along the lower edge first, then remove the four upper screws. Put the cover plate aside on a soft cloth or similar material to avoid scratches.
When replacing the left-hand cover, press it forcefully inwards to overcome the pressure of the leaf springs. These are used to connect the cover plate to chassis ground in order to create a isolated box to prevent radio interference. Before finally tightening the screws, check that the cover is aligned with the front moulding and the rear plate and that it does not interfere with the right-hand door.
3.3 Left-Hand Cover
#T10 Torx Screws
#T10 Torx Screws
R
e
a
d
y
E
rro
r
P
o
w
e
r
EasyC
oder 601 X
P
Print
3
6
8
9
.
7
P
a
u
s
e
S
e
tu
p
F
e
e
d
E
n
te
r
2
1
0
C
5
4
F3
F4
F5
F1
F2
S
h
ift
Page 22
UBI EasyCoder 601 XP – Service Manual Ed. 1
22
Chapter 4 Chassis
Chapter 4
4. Chassis
The printer's chassis is made up by three main parts:
• The centre-line wall
• The bottom plate
• The rear plate
The centre-line wall is used for fitting all parts concerned with the actual printing, such as the print unit, the ribbon mechanism, the rewind unit, the slack absorber, the paper supply, and various sensors. For maximum stability, the centre-line wall is fitted to the bottom plate, the rear plate and the front moulding by a total of 10 #T20 Torx screws. There is also a bracket between the centre-line wall and the rear plate.
In the electronics compartment, both the CPU board and the power supply are fitted to the centre-line wall.
To avoid ribbon wrinkling and paper misalignment, it is imperative that the printer stands on a plane surface and the centre-line wall is straight. If such problems should occur, especially after transporta­tion, check that the centre-line wall is straight.
4.1 Description
Bottom Plate
Centre-line Wall
Rear Plate
Rubber Foot (x4)
4.2 Centre-Line Wall
Page 23
UBI EasyCoder 601 XP – Service Manual Ed. 1
23
Chapter 4 Chassis
The bottom plate is fitted with four easily replaceable rubber feet. These feet could be removed and the holes used to bolt the printer to a frame, table or similar. The holes have a diameter of 10 mm (0.39").
The two keyholes should never be used to bolt the printer to a frame, or the bottom plate may be bent causing ribbon wrinkling and paper misalignment. These holes are only used for fixtures during manu­facture.
The bottom plate is also fitted with four hinges, two for the front hatch or cutter unit and the other two for the right-hand door. In case of misalignment, the hinges could be adjusted using a #T10 Torx key.
The rear plate is attached to the bottom plate using three #T20 Torx screws and to the centre-line wall by two #T20 Torx screws. There is also a bracket between the rear plate and the centreline wall. The rear plate has a number of slots for connectors, switches etc. as illustrated below.
4.3 Bottom Plate
4.4 Rear Plate
Main Switch Mains Receptacle
Memory Card Slot
RS 232C Serial Interface ("uart1:")
Centronics Parallel Interface
Provision for one Optional Interface Board
Bar Code Wand Connector Provision for 1 – 2 Electronic Keys
Upper External Paper Intake
Lower External Paper Intake
Page 24
UBI EasyCoder 601 XP – Service Manual Ed. 1
24
Chapter 5 Paper Supply
R
e a d
y
E r ro
r
P o
w e
r
EasyCoder 601 XP
P
rint
3
6
8
9
.
7
P
a u s
e
S e
tu
p
F
e e
d
E n
te
r
2
1
0
C
5
4
F
3
F
4
F
5
F
1
F
2
S
h ift
IMPORTANT PRINTHEAD AND RIBBON INFORMATION
T
h
e
u
s
e
o
f a
n
y
th
e
rm
a
l tr
a
n
s
f
e
r r
ib
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a
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il
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. U
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th
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f p
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s
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o
f
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r
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th
e
a
d
. U
B
I h
a
s
c
a
re
fu
lly
m
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e
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r
. W
e
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re
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e
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ly
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ly
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in
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.
T
E
A
R
-O
F
F
Chapter 5
The internal paper supply consists of a shaft with five modular bobbins on which a paper roll can be fitted. The shaft is screwed into a flange fitted to the centre-line wall by means of two #T20 Torx screws inserted from the electronics compartment. The bobbins are spring-loaded in order to fit paper roll cores with an inner diameter between 38 and 40 mm (1.5 – 1.6").
A large crescent-shaped plate keeps the paper roll aligned with the print mechanism.
Maximum diameter of an internal paper roll is 205 mm (8") and maximum width is 168 mm (6.61").
5.1 Internal Supply
5. Paper Supply
Paper Supply Spool
Page 25
UBI EasyCoder 601 XP – Service Manual Ed. 1
25
Chapter 5 Paper Supply
The bobbin package can be dismantled by removing the #T20 Torx screw at the end of the shaft. Inside the outermost bobbin, there is a spring that presses the bobbin package towards a felt pad in order to break the rotation. Else, the momentum of a large and heavy paper roll might cause excessive paper to be unwound when the printing is stopped. The brake torque should be 70 ±20 Nmm1.
The code disc fitted at the innermost part of the bobbin package has no use in EasyCoder 601 XP, but is retained for logistic reasons (common assembly with EasyCoder 501/601). Be careful to fit the studs of the innermost bobbin into the holes in the code disk when the package is assembled.
5.1 Internal Supply,
cont'd.
1
/. Refer to Appendix 2 for a de­scription of how to check the brake torque.
Flange
Nylon Disc
#T20 Torx Screw
Washer
Spring
Shaft
Felt Pad
Disc
Bobbins
Code Disc
Page 26
UBI EasyCoder 601 XP – Service Manual Ed. 1
26
Chapter 5 Paper Supply
Two adapters (standard accessories) can be fitted onto the bobbins in order to accept paper rolls with 76 mm (3") cores. Each adapter is locked by means of a #T20 Torx screw. Be careful not to let the screw hit the leaf springs or the cams of the bobbins.
5.1 Internal Supply,
cont'd.
3" Adapters
Page 27
UBI EasyCoder 601 XP – Service Manual Ed. 1
27
Chapter 5 Paper Supply
In addition to the internal paper roll, the EasyCoder 601 XP printer can also use thermal paper or receiving face material from an external supply, e.g. an external paper roll or a stack of fan-folded tickets. The paper is inserted into the printer through either the upper or lower slot in rear plate.
It is important that the paper web is properly aligned in parallel with the printer's centre-line wall. Therefore, we offer an optional “Fan Fold Kit” consisting of a bracket with two guides that can be fitted in either the upper or lower slot in the rear plate. The outer guide is adjustable for different paper widths.
5.2 External Supply
Fan Fold Guides
Page 28
UBI EasyCoder 601 XP – Service Manual Ed. 1
28
Chapter 5 Paper Supply
Installation, Fan Fold Guides
The bracket with the two guides can be fitted either at the upper or lower slot in the rear plate, depending on how the paper supply is located in relation to the printer.
Insert the complete unit through the slot from the outside and attach it to the rear plate by means of two #T20 Torx screws. In case of the upper position, use the screws included in the kit, and in case of the lower position, use the two existing screws that hold the rear plate to the bottom plate.
Adjust the position of the outer guide to fit the width of the paper.
5.2 External Supply,
cont'd.
Page 29
UBI EasyCoder 601 XP – Service Manual Ed. 1
29
Chapter 5 Paper Supply
Paper Load
Load the paper web according to the illustrations below. Note that the external supply should be protected from dust, sand, grit and other particles that may damage the printhead or impair the printout quality.
Note that if the printer is to be permanently used with an external paper supply only, the internal paper supply spool, together with the large crescent-shaped guide plate could easily be removed (see chapter 5.1).
5.2 External Supply,
cont'd.
Page 30
UBI EasyCoder 601 XP – Service Manual Ed. 1
30
Chapter 6 Label Slack Absorber
R e
a d y
E
rr o
r
P
o w
e
r
EasyCoder 601 XP
Print
3
6
8
9
.
7
P a u
s e
S
e tu
p F e
e d
E
n te
r
2
1
0
C
5
4
F3
F4
F5
F1
F2
S h
ift
IM
P
O
R
T
A
N
T
P
R
IN
T
H
E
A
D
A
N
D
R
IB
B
O
N
IN
F
O
R
M
A
T
IO
N
The use of any thermal transfer ribbons, other than those supplied by UBI, w
ill invalidate
the printhead w
arranty.
UBI thermal transfer ribbons are engineered specifically for this printhead.
The quality of therm
al and thermal transfer media supplies in this printer is also of great importance
for the quality of printing bar codes and a long life of the printhead. UBI has carefully matched the
paper we recomm
end/provide to the needs of this printer. W
e therefore strongly advise of using
only UBI recommended/provided supplies to ensure a high quality printing.
T
E
A
R
-
O
F
F
Chapter 6
6. Label Slack Absorber
6.1 Description
The label slack absorber compensates for sudden jerks at the paper web, e.g. when high speed printing is started and stopped. When the printing starts, the tension is increased and the absorber is pulled forward/upward. Soon the heavy paper roll starts to rotate and the tension decreases. The spring-loaded absorber can then return towards its original position. During the printing, the absorber will flutter back and forth, compensating for the variations in tension.
To facilitate paper load, the label slack absorber can be rotated 180° clockwise. It cannot be locked in open position.
For demanding applications with high speed printing, a guide can be fitted on the label slack absorber to prevent paper misalignment. The guide is included at delivery of the printer, but is not fitted as standard.
Label Slack Absorber
Paper Guide
(not fitted as standard)
Page 31
UBI EasyCoder 601 XP – Service Manual Ed. 1
31
Chapter 6 Label Slack Absorber
6.2 Dismantling
#T20 Torx Screws (2x)
Flange
#T10 Torx Screw
Shaft
Torsion Spring
Grip (green)
The label slack absorber unit is fitted to the centre-line wall by means of two #T20 Torx screws inserted through the centreline wall from the electronics compartment. The shaft should be screwed into the flange with a tightening torque of 5 Nm.
Paper Guide
(green)
Page 32
UBI EasyCoder 601 XP – Service Manual Ed. 1
32
Chapter 7 T ransfer Ribbon Mechanism
Ready
Error
Pow
er
E
asy
C
o
d
er 601 X
P
P
r
i
n
t
3
6
8
9
.
7
Pause
Setup
Feed
Enter
2
1
0
C
5
4
F
3
F
4
F
5
F
1
F
2
Shift
IM
PORTAN
T PRINTHEAD AN
D RIBBON IN
FORM
ATION
T
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.
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f
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.
T
E
A
R
-
O
F
F
Chapter 7
7. T ransfer Ribbon Mechanism
7.1 Description
The thermal transfer ribbon mechanism is standard, but can be omitted on special order. The mechanism consists of three main units:
• Ribbon unwind unit (see chapter 7.2)
• Ribbon rewind unit (see chapter 7.3)
• Ribbon-end sensor (see chapter 7.4)
Ribbon Unwind Unit
Ribbon Rewind Unit
Ribbon End Sensor
(hidden)
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Chapter 7 T ransfer Ribbon Mechanism
Description
The ribbon unwind unit is used to accommodate the fresh supply of thermal transfer ribbon. Only original transfer ribbon from UBI must be used (else the warranty will be invalidated).
The unit is designed to keep the ribbon tight all the time in order to avoid wrinkling, which would ruin the printout. It consists of a shaft on which a spool is fitted. The spool can pivot ± 1.3º on the shaft and the spool can be moved sideways.
Adjustment
It is most important for avoiding ribbon wrinkling that the pivoting point of the spool is centred in relation to the ribbon width. Therefore, the shaft is provided with six grooves which correspond to the standard widths of UBI transfer ribbons (see table to the left). Choose the groove that comes closest to the ribbon width. By compressing the spool, its snap-lock will disengage from the presently engaged groove and it can be moved sideways to another position. Make sure that the snap-lock has engaged a groove by trying to move the bobbin without compressing it.
Ribbons with a width less than 60 mm (2.36") can be used provided they are wound on a core with a width of at least 45 mm (1.77").
7.2 Ribbon Unwind Unit
Ribbon Width Position (groove)
≤ 60 mm (2.36") 1:st (innermost)
88 mm (3.5") 2:nd 110 mm (4.3") 3:rd 130 mm (5.1") 4:th 154 mm (6.0") 5:th 166 mm (6.5") 6:th (outermost)
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Chapter 7 T ransfer Ribbon Mechanism
Working Principles
The ribbon unwind unit is braked by a spring affixed to the printer's centreline wall, partly enveloped by a sleeve affixed to the shaft. Initially, the spring expands towards the inner walls of the sleeve, thereby breaking the rotation of the shaft. When the bobbin is forced to rotate (i.e. when the ribbon is unwound), the breaking spring is compressed. After approximately half a turn, the diameter of the spring has been compressed enough to allow the sleeve to slip. The brake torque should be 125 ±10 Nmm1. The sleeve is filled with ball bearing grease. If the brake torque deviates from the recommended value, replace the grease. We recommend Castrol Sinplex 2. The expected interval between replacing the grease is 8 – 10 million print cycles.
When the rotating force ceases, the spring tends to pull back the ribbon, keeping it tight.
The code disc is used in connection with the optional ribbon low sensor (see chapter 12).
Dismantling
The shaft rotates in bearings fitted into a flange, which is attached to the centre-line wall by two #T20 Torx screws inserted from the electronics compartment. Before the unit can be pulled out, the sleeve/spring package must be removed. Use a 2 mm hexagon wrench to loosen the grub screw.
Bobbin assy.
Sleeve
Circlip
Circlip
Brake Spring
Bearing
Bearing
Flange
Shaft
Grooves
Grub Screw (M4)
Plastic Circlip
Code Disc
7.2 Ribbon Unwind Unit,
cont'd.
1
/. Refer to Appendix 2 for a description of
how to check the brake torque.
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Chapter 7 T ransfer Ribbon Mechanism
7.3 Ribbon Rewind Unit
Description
The ribbon rewind unit pulls the transfer ribbon around the print­head and winds it up on a cardboard core. The unit is driven via a belt by the same stepper motor that drives the print roller.
The rewind unit is provided with a friction brake and a ratchet gear wheel in order to keep the ribbon tight.
The ribbon rewind unit is fitted to the centre-line wall by means of two #T20 Torx screws inserted from the electronics compartment. One of the screws runs in a crescent-shaped slot to allow adjustment or removal of the belt.
Adjustment
The braking torque can be adjusted by adding or removing washers at the outer end of the shaft and should be adjusted to 215±20 Nmm at 20°C 1.
1
/. Refer to Appendix 2 for a description of
how to check the brake torque.
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Chapter 7 T ransfer Ribbon Mechanism
Dismantling
To remove the unit, remove the two #T20 Torx screws that hold the flange from inside the electronics compartment and pull the belt off the gear wheel. Then dismantle the gear wheel by removing the circlip. Now you can pull the remaining parts of the unit out into the paper compartment.
To dismantle the unit further, remove the #T20 Torx screw and washer at the end of the shaft and pull off the bobbin, the compres­sion spring and the nylon washer. Then you can inspect the friction felt. No further dismantling is normally required.
Reassemble in reverse order, making sure that the one-way clutch in the gear wheel works in the correct direction. Finally, fit the belt over the gear wheel, adjust the tension of the belt as described in chapter 8.5, and tighten the screws that hold the flange.
7.3 Ribbon Rewind Unit,
cont'd.
#T20 Torx Screw
Washers
Compression Spring
Slide Bearing
Slide Bearing
Bobbin
Bobbin Plate
Shaft
Circlips
Friction Felt
Grub Screw
Carrier
Gear Wheel
Ball Bearing
Flange
Ball Bearing
Spring
Washer
Washer
0–4 Torque Adjustment
Friction Plate
0–1 Torque Adjustment
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Chapter 7 T ransfer Ribbon Mechanism
7.4 Ribbon End Sensor
Description
The ribbon end sensor is a photoelectrical device that detects whether there is any thermal transfer ribbon in the printer or not. It is fitted to the centre-line wall immediately behind the print mechanism by means of a single #T10 Torx screw. The sensor assembly consists of a sensor with cable and connector, and a combined mirror/bracket.
Working Principles
The ribbon end sensor works like this. A narrow beam of light is emitted from the sensor and is either absorbed by the black transfer ribbon, or reflected back by a mirror to a receiver in the sensor. The software compares the signal from the sensor with the printer's setup in regard of media type in order to avoid printing on the wrong type of media:
Set up Detection Error
Thermal transfer media Ribbon OK Thermal transfer media No ribbon Error 1027 Out of transfer ribbon Direct thermal media No ribbon OK Direct thermal media Ribbon OK
The ribbon end sensor is connected to P52 on the CPU board.
Sensor
Mirror
Bracket
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Chapter 7 T ransfer Ribbon Mechanism
Adjustments
The intensity of the light emitted from the sensor is controlled by a strap on P56 on the CPU board: Strap fitted = higher intensity Strap removed = lower intensity
The sensitivity of the receiver is controlled by the potentiometer WR52 on the CPU board.
Before adjusting the sensor, check that the sensor and the mirror are clean and free from obstructions.
A simple program can be used to check the ribbon end sensor, e.g.:
10 'RIBBON END SENSOR TEST 20 'INTERRUPT PROGRAM BY TYPING "X" 30 BREAK 1,88:BREAK 1 ON 40 ON BREAK 1 GOSUB 1000 50 IF (PRSTAT AND 8) THEN SOUND 100,50 ELSE BEEP 60 GOTO 50 70 END 1000 BREAK 1 OFF 1010 GOTO 70
RUN
Remove the transfer ribbon from the sensor's beam of light (e.g. by pulling out a loop) and run the program. The printer should emit a low sound.
Put back the ribbon into the beam and the printer should start to beep with a high-pitch tone.
If the printer does not behave as described, remove the left-hand cover and, with the power still on, turn the potentiometer marked “RI-END” (WR52) at the upper edge of the CPU board back and forth. If that does not help, fit or remove the jumper on P56.
If the sensor refuses to work, consider the possibility that the mirror plate may be bent before discarding the sensor.
7.4 Ribbon End Sensor,
cont'd.
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Chapter 8 Print Unit
R e
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Chapter 8
8. Print Unit
8.1 Description
The print unit is partly integrated with the ribbon rewind unit (see chapter 7.3) and the optional backing paper rewinder unit (see chapter 9).
The main parts of the print unit are:
• The rubber-coated pressing roller drives the paper forward under the printhead and provides the necessary counter-pressure.
• The stepper motor drives the pressing roller via one belt and the ribbon return roller and the ribbon rewind unit via another. The rewind roller is idle, unless a backing paper rewind kit is fitted, see chapter 9.
• The tear-off edge makes it easier to tear off paper strip. It is also used for peel-off operation.
• The label-stop sensor (LSS) controls the paper feed and checks for out-of-paper conditions.
• The printhead produces the heat that melts the “ink” on the transfer ribbon or blackens the direct thermal paper in patterns that make up the letters, graphics, or bar codes.
• The headlift mechanism presses the printhead against the thermal paper or transfer ribbon, or lifts the printhead to allow paper and ribbon load.
Print Unit
Ribbon Rewind Unit
Backing Paper Rewind Unit
(option)
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Chapter 8 Print Unit
8.1 Description, cont'd.
The print unit is a self-contained module and attached to the printer's centre-line wall by means of four #T20 Torx screws. There are also a number of cables running from the print mechanism to the CPU board (see chapter 15.3), which are not illustrated.
The ribbon rewind unit is driven by a belt from the motor of the print unit via an idle pulley attached to the inside of the centreline wall. The rewind roller (fitted underneath the pressing roller) may be driven by a belt to the optional rewinder's stepper motor, if a backing paper rewind unit is fitted. These belts have to be removed before the print unit can be pulled out.
Pressing Roller
Stepper Motor
Tear-Off Edge
Printhead
Headlift Mechanism
Ribbon Return Roller
Rewind Roller
Belt to Ribbon Rewind Unit
Label Stop Sensor
(hidden)
Locking Handle
(in open position)
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Chapter 8 Print Unit
8.1 Description, cont'd.
This overview illustrates the various parts in the print unit. The idle pulley fitted to the centre-line wall and the ribbon rewind unit are not included. Note that some of the parts illustrated here are not available as separate spare parts, but must be bought as ready­assembled units.
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Chapter 8 Print Unit
8.2 Pressing Roller
Description
The pressing roller is coated with silicon rubber. It is imperative that the roller is clean and free from uneven wear or dents. The pressing roller is identical to the rewind roller, but not to the ribbon return roller. It is normal that the pressing roller needs to be replaced after a period of time depending on print volume and other circum­stances.
Replacement
• Turn off the power to the printer and disconnect the power cord.
• Open the front and right hand doors.
• Remove the cover over the electronics compartment, which is held by eight #T10 Torx screws.
• Remove the tension of the belt to the ribbon rewind unit by loosening the two #T20 screws that holds the ribbon rewind unit.
• Dismantle the stepper motor from the bracket by removing the two #T20 Torx screws.
• Free the belt from the pulley of the ribbon rewind unit and manipulate the stepper motor so it comes free from both belts. Remove the stepper motor.
• Remove the belt from the pulley of the pressure roller.
• Insert a 2 mm hexagon key through the semicircular slot in the front plate and loosen the grub screw that holds the pulley on the shaft of the pressing roller.
• Using a #T20 screwdriver, remove the bracket that holds the outer end of the pressing roller and pull out the entire package.
• Reassemble in reverse order using a fresh set of roller and bearings. When fitting back the pulley on the pressing roller shaft, check that the distance between the pulley and the inner gable of the print unit becomes 5 mm (.2").
• When putting back the stepper motor, fit the short belt first, while letting the long belt hang loosely on the idler in a loop, through which you can insert the pulley of the stepper motor. Do not put the long belt around the pulley of the ribbon rewind unit until you have fitted the stepper motor to the bracket and checked that both belts are engaged by the stepper motor's pulleys.
• Adjust the tension of the belts as described in chapter 8.5 and put back the cover.
Refer to illustration on next page!
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Chapter 8 Print Unit
8.2 Pressing Roller,
cont'd.
In the illustration below, the upper parts of the print unit and the LSS have been omitted to improve visibility.
Stepper Motor
#T20 Torx Screw
#T20 Torx Screw
#T20 Torx Screw
Belt to Ribbon Rewind Unit
Belt to
Pressing Roller
Pulley
Ball Bearing
Plastic Bearing
Spacer
Pressing Roller
Ball Bearing
Plastic Bearing
Bracket
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Chapter 8 Print Unit
Description
The stepper motor drives the pressing roller via a short belt and the ribbon return roller and the ribbon rewind unit via another, longer belt. A freely rotating pulley attached to the printer's centre-line wall makes the outside of the longer belt drive the ribbon return roller.
The stepper motor is driven in half-step mode between 70 and 145 mm/sec., and in full-step mode between 145 and 225 mm/sec. However, when motor slows down at the end of a label, it will still be driven in full-step mode even below 145 mm/sec., which will result in a slightly increased noise level during the last centimetre or so of the label.
The stepper motor has a stop accuracy of 2 dots, i.e. the theoretical feed error will be max. +1 dot. However, mechanical conditions such as a worn pressing roller or a slippery backing paper may affect the feed accuracy adversely.
The stepper motor is fitted by means of two #T20 Torx screws to a bracket, which in its turn is attached to the print unit gable by three #T20 Torx screws. The pulleys of the stepper motor are glued to the motor's shaft.
Replacement
Replace the stepper motor as follows:
• Turn off the power to the printer and disconnect the power cord.
• Open the front and right hand doors.
• Remove the cover over the electronics compartment, which is held by eight #T10 Torx screws.
• Disconnect the cable to the stepper motor from P420 on the CPU board.
• Remove the tension of the belt to the ribbon rewind unit by loosening the two #T20 screws that holds the ribbon rewind unit.
• Dismantle the stepper motor from the bracket by removing the two #T20 Torx screws.
• Free the belt from the pulley of the ribbon rewind unit and manipulate the stepper motor so it comes free from both belts. Remove the stepper motor.
• When putting back the stepper motor, fit the short belt first, while letting the long belt hang loosely on the idler in a loop, through which you can insert the pulley of the stepper motor. Do not put the long belt around the pulley of the ribbon rewind unit until you have fitted the stepper motor to the bracket and checked that both belts are engaged by the stepper motor's pulleys.
• Connect the cable of the stepper motor to P420 on the CPU board (marked “STM1”).
• Adjust the tension of the belts as described in chapter 8.5 and put back the cover.
Refer to illustration on next page!
8.3 Stepper Motor
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Chapter 8 Print Unit
#T20 Torx Screw
#T20 Torx Screw
#T20 Torx Screws (3x)
Stepper Motor
Bracket
Inner Print Unit Gable
Belt
(to Pressing Roller)
Belt
(to Ribbon Rewind Unit
and ribbon Return Roller)
Fitted to Centre-
line Wall
Fitted on Return
Roller Shaft
Fitted on Pressing
Roller Shaft
8.3 Stepper Motor,
cont'd.
In the illustration below, most parts of the print unit have been omitted to improve visibility. Note that the bracket does not need to be removed when the stepper motor is replaced.
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Chapter 8 Print Unit
Description
The print unit normally has two toothed belts, one that drives the pressing roller and another that drives the ribbon return roller and the ribbon rewind unit. There is also a third belt if an optional backing paper rewind unit is fitted (see chapter 9). The belts are subject to wear and may need periodical replacement. Properly adjusted tension and alignment of the pulleys will increase time between replacements.
Replacement
• Turn off the power to the printer and disconnect the power cord.
• Open the front and right hand doors.
• Remove the cover over the electronics compartment, which is held by eight #T10 Torx screws.
• Remove the tension of the belt to the ribbon rewind unit by loosening the two #T20 screws that holds the ribbon rewind unit.
• Dismantle the stepper motor from the bracket by removing the two #T20 Torx screws.
• Free the belt from the pulley of the ribbon rewind unit and manipulate the stepper motor so it comes free from both belts. Remove the stepper motor.
• Replace the defective belt or belts.
• When putting back the stepper motor, fit the short belt first, while letting the long belt hang loosely on the idler in a loop, through which you can insert the pulley of the stepper motor. Do not put the long belt around the pulley of the ribbon rewind unit until you have fitted the stepper motor to the bracket and checked that both belts are engaged by the stepper motor's pulleys.
• Adjust the tension of the belts as described in chapter 8.5 and put back the cover.
Refer to illustration on next page!
8.4 Belts
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Chapter 8 Print Unit
8.4 Belts, cont'd.
In the illustration below, only part of the centreline wall is shown. There is no need to completely remove the ribbon rewind unit, only to rotate it in order to remove the tension to the belt.
Stepper Motor
#T20 Torx Screw
#T20 Torx Screw
#T20 Torx Screw
#T20 Torx Screw
Ribbon Rewind Unit
Belt
Belt
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Chapter 8 Print Unit
8.5 Belt Adjustment
Pressing Roll Belt
Oversized holes allow the position of the stepper motor relative to the bracket to be adjusted so the tension of the belt does not become too tight, causing unnecessary wear. Rotate the gear wheel 1/4 of a turn at a time and check that the gear wheel and pressing roller can be rotated freely by the belt, which should flex just a little when you press it with your finger.
Stepper Motor
Stepper Motor Pulley
Belt
Pressing Roller Pulley
#T20 Torx Screw
#T20 Torx Screw
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Chapter 8 Print Unit
Ribbon Rewinder Belt
The belt should be adjusted so it neither jump the cogs nor becomes subjected to unnecessary wear.
Before adjusting this belt, check the tension of the pressing roller belt as described on the previous page.
Slightly loosen the two #T20 Torx screws that hold the flange of the ribbon rewind unit.
Turn the ribbon rewind unit so the belt becomes tight, yet will flex slightly when you press it with a finger. Tighten the screws.
Check that the parts can rotate freely and without any unpleasant sound and that the belt does not jump the cogs when you rotate the ribbon rewind unit forcefully.
The ribbon return roller should be easy to rotate manually. Once the motor starts, the belt will be tight and will drive the ribbon return roller.
If the idler roller starts to squeak, lubricate the inside of the belt with a small quantity of grease.
8.5 Belt Adjustment,
cont'd.
Stepper Motor
Stepper Motor Pulley
Belt
Ribbon Rewind Unit Pulley
#T20 Torx Screw
#T20 Torx Screw
Ribbon Return
Roller Pulley
Idler Roller
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Chapter 8 Print Unit
8.6 Label Stop Sensor
Description
The label stop sensor (LSS) is used to control the paper feed and consists of a sliding carriage on which two photoelectrical sensors are fitted. Both sensors are identical and contain one light-emitting diode and one light-sensitive receiver. The distance from the light path between the two parts of the LSS to the dot line on the printhead is 46.3 mm (1.82"). The sensors can be moved up to 50 mm (1.97") out from the inner edge of the paper web by means of a screw protruding through the lower outer gable of the print unit. The label stop sensor is hidden inside the print mechanism and covered by two black plastic guide plates, which can be removed for cleaning.
Working Principles
The label stop sensor serves a number of purposes, depending on how the printer is set up in regard of media type:
Label (w gaps):
A beam of light is emitted from the upper sensor and received by the lower sensor. The firmware detects the front of each label, i.e. when the light is completely interrupted by the opaque label, as opposed to the semi-transparent backing paper in the gaps between labels. If no label has been detected during a paper feed corresponding to more than 150% of the set label length (Setup\Media\Media Size\Length), a “next-label-not-found” condition is assumed. If a renewed print operation gives the same result, an “out-of-paper” condition is assumed.
Ticket (w mark):
A beams of light is emitted from the lower sensor1. The beam can either be reflected back to the same sensor by the white paper, or be absorbed by a black mark. The firmware detects when the front edge of a black mark passes the sensor, i.e. when light starts to be absorbed. If no mark has been detected during a paper feed corresponding to more than 150% of the set ticket length (Setup\Media\Media Size\Length), a “next-label-not-found” con­dition is assumed. If a renewed print operation gives the same result, an “out-of-paper” condition is assumed.
Ticket (w gaps):
The light is emitted from the upper sensor and received by the lower one. The light will either pass uninterrupted through a detection gap in the web or be blocked by the non-transparent ticket. The firmware detects the rear edges of detection gaps, i.e. when the light starts being interrupted. If no ticket has been detected during a paper feed corresponding to more than 150% of the set ticket length (Setup\Media\Media Size\Length), a “next-label-not-found” con­dition is assumed. If a renewed print operation gives the same result, an “out-of-paper” condition is assumed.
1
/. For detection of black marks on the top of the paper, the cables from the two sensors could be switched on the CPU board.
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Chapter 8 Print Unit
8.6 Label Stop Sensor,
cont'd.
Var. Length Strip and Fix Length Strip:
The light is emitted from the upper sensor and received by the lower sensor. The beam will either be blocked by the paper or be completely uninterrupted when the printer runs out of paper . The firmware assumes an out-of-paper condition if the light has not been interrupted within a paper feed corresponding to 150% of the set length (Setup\Media\Media Size\Length).
In case of “variable length strip”, the printer will feed out an extra 195 dots of paper after the last dot of the print image to allow the strip to be torn off. Note that the print image may contain “invisible” dots, such as the “white” parts of a character cell or an image, or a space character.
General:
The information on where the gaps or marks are presently posi­tioned relative the LSS (and thereby also relative the dot line on the printhead) is saved as an “invisible” file in the flash memory's file operating system (see chapter 15.2). However, if the printhead is lifted, or if the power is interrupted during printing, this file may be cleared1, which will affect any labels between the LSS and the dot line. In this case, perform a TESTFEED operation.
The LSS checks for gaps or marks at every dot of positive paper feed (feed out/print), but gaps or marks are ignored at negative paper feed (pull back). Gaps and black marks up to 256 dots (21.3 mm/0.84") are allowed.
Adjustment of the Sensitivity
The LSS should always be adjusted when the user changes to another brand (sometimes even batch) of media, and when a defective sensor has been replaced. This is especially the case with self-adhesive labels on backing paper, since the transparency of the backing paper may vary and the difference between labels and gaps may be too small. Before starting the adjustment, check that both the upper and lower sensor are clean and free from obstructions and that the paper guides are adjusted so as to guide the paper web with a minimum of play. Also check that the LSS is laterally positioned so as to detect the gaps or black marks, whenever such media are used.
As standard, there are four means of adjustment for the LSS:
• Performing a TESTFEED by simultaneously pressing the “Shift” and “Feed” keys in the Immediate Mode.
• Selecting the TESTFEED option in UBI Shell.
• Selecting the TESTFEED option in the Setup Mode.
• Executing a TESTFEED statement in a UBI Fingerprint pro­gram.
The printer feeds out 1.5 times the set label length while testing all levels of the LSS at each millimetre of paper feed. The LSS is adjusted according to the result of the check and a full label is fed out in accordance with the present feedadjust setup.
The label stop sensor/black mark sensor can be turned off for a specified amount of paper feed by means of the LBLCOND statement, see UBI Fingerprint ≥7.11 Reference Manual.
1
/. It is possible to decide if the paper feed data will be cleared or not when the printhead is lifted by means of the UBI Fingerprint instruction SYSVAR(28). By default, the paper feed data are not cleared.
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Chapter 8 Print Unit
OUT
IN
Upper part of print unit omitted to improve view.
Upper part of LSS
Adjustment
Screw
Detection Slot
Adjustment of the Lateral Position
The label stop/black mark sensor (LSS) can be laterally adjusted within a range of 0 to 50 mm (1.96") from the inner edge of the paper by means of a screw accessible through the outer lower gable. Turning the screw clockwise will move the LSS inwards and vice versa. The position of the LSS in relation to the paper is best checked by looking head on into the print unit when the printhead is lifted. Align the centrepoint of the V-shaped upper sensor with the centre of the slots or marks to be detected.
The linear markings on the lower guide plate can also be used for positioning of the LSS as they are spaced with an interval of exactly 1 cm (0.39") from the edge that guides the paper. This method is especially useful for black marks (measure the lateral position of the black marks with a ruler before loading the paper).
If using irregularly shaped labels, align the LSS with the front tips of the labels
8.6 Label Stop Sensor,
cont'd.
Linear Markings
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Chapter 8 Print Unit
Removing the Guide Plates
The LSS guide plates will need to be removed for occasional cleaning, replacement and when replacing a defective sensor.
• To remove the upper guide plate, just pull it straight out.
• To remove the lower guide plate, disengage the snap-lock (acces­sible through an rectangular slot in the lower gable) using e.g. a screwdriver and lift the outer end of the guide plate. Then pull it out.
When cleaning the guide plates, use a soft cloth moistened with isopropyl alcohol. Do not use any other type of chemicals. Be careful not to scratch the windows.
Caution! Isopropyl alcohol [(CH3)2CHOH; CAS 67-63-0] is a highly flammable, moderately toxic and mildly irritating substance.
8.6 Label Stop Sensor,
cont'd.
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Chapter 8 Print Unit
8.6 Label Stop Sensor,
cont'd.
Replacing the Sensors
To remove the LSS bracket from the carriage, e.g. for cleaning or replacing a sensor, proceed as follows:
• Turn off the power, remove the power cord and remove the cover over the electronics compartment.
• Remove the upper and lower plastic guide plates.
• Adjust the LSS to approximately centre position.
• Disconnect the cables from P53 and P54 on the CPU board.
• Disengage the snap-lock, using a screwdriver from the paper compartment side, and push the outer end of the LSS bracket upward. Then pull the bracket out from the carriage, taking care not to damage the cables.
Note! The snap-lock is fragile.
• Remove the two #T8 Torx screws that hold the defective sensor and replace it.
Snap-Lock
Upper Sensor
Lower Sensor
Carriage
LSS Bracket
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Chapter 8 Print Unit
Replacing the Sensors, cont'd.
To reassemble the LSS, proceed as follows:
• Thread the cables through the hole in the inner gable.
• Place the inner, lower corner of the bracket into the groove in the carriage, almost at the innermost end.
• Tilt the bracket up at the outer end and push it inwards so the inner notch in the bracket engages the carriage.
• Press down the outer end of the bracket, so the snap-lock engages the outer notch.
• Press the bracket inwards as far as it goes and check that the bracket is secured by the snap-lock.
• Connect the cable from the lower sensor to P54 (marked “LSS­BOT”) and the cable from the upper sensor to P53 (marked “LSS-TOP”) on the CPU board.
• Put back the guide plates, the electronics compartment cover, and the power cord.
• Adjust the lateral position of the LSS.
8.6 Label Stop Sensor,
cont'd.
1.
2.
3.
Snap-Lock
Inner Notch
Outer Notch
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Chapter 8 Print Unit
Description
The printing is produced by the thermal printhead, which consists of a line of very small, closely spaced resistors on a ceramic tile fitted across the paper web. When a current is led through the resistors, commonly called “dots,” these will be heated very quickly. When the current is shut off, the dots cool down just as fast. As the paper is fed past the dots, the hot dots will produce a number of black spots on direct thermal paper, or on other face materials via a thermal transfer ribbon. The spots can be combined into patterns, which make up letters, bar codes or images.
The direct thermal printing method requires a special paper coated with a thin layer of heat-sensitive chemicals. As the paper is fed past the dots, the heat from the dots will make the chemicals react, producing a dark salt, which makes up the imprint under each dot. In the thermal transfer printing method, a special “ink”-coated transfer ribbon is used. When the ribbon is heated by a dot on the printhead, the “ink” melts and sticks to the receiving face material, where the ink immediately becomes solid again, producing a black spot. The transfer ribbon does not smear, neither before nor after printing. Nor do the printed labels smear, even if the printout may be smudged by extensive rubbing if an unfortunate combination of ribbon and face material is used. The thermal transfer method makes it possible to use a much wider range of face materials for printing, e.g. papers, boards, plastics, foils etc. However, an original transfer ribbon from UBI must always be used.
Information on how to switch between direct thermal and thermal transfer printing is provided in the Installation & Operation manual. The basis for all measures and positioning in the UBI Fingerprint programming language is the size of printhead dots. In an 12 dots/ mm printhead, each dot has a nominal size of 0.083 mm (3.28 mils). This means that a heated dot under standardized conditions will produce a black spot which has a diameter of 0.083 mm. Depending on dot temperature, exposure time, paper and ribbon characteristics etc., the spot may actually be somewhat smaller (weak print) or larger (black print), but that does not affect the calculation of distances, sizes and positions.
The printer auto-detects the printhead density as well as the head resistance at startup. The printhead can also be checked using the UBI Fingerprint function HEAD.
8.7 Printhead
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Chapter 8 Print Unit
Description, cont'd.
The 12 dots/mm (304.8 dpi) printhead contains 1984 dots, which give a maximum print width of 168 mm (6.61"). The same unit of measure (dots) can be used both across and along the paper feed direction.
Specifications:
Density 12 dots/mm (304.8 dpi) Print width 168.0 mm (6.61") Number of dots 1984 Dot size 0.083 mm (3.28 mils)
8.7 Printhead, cont'd.
PAPER FEED
DIRECTION
Dot 0
Dot-line on printhead
X-start Width
Origin
Length
Dot 1983
2.7 mm (0.11")1.0 mm (0.04")
PRINT
WINDOW
PRINT
WINDOW
max. 168 mm (6.61")
165.3 mm (6.49")
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Chapter 8 Print Unit
Description, cont'd.
The printhead is fitted to a bracket by means of two screws. The printhead and the bracket are always delivered as a complete assembly. Two hooked fingers at the rear of the bracket are fitted over the headlift shaft so as to hold the printhead in place. Two U­shaped tabs on either side of the bracket connect to bearings on the pressing roller shaft when the printhead is closed, making sure that the printhead becomes properly aligned with the pressing roller. There are no facilities for adjusting the position of the printhead relative the pressing roller, neither longitudinally nor laterally.
There are two cables from the printhead to the CPU board:
• The outermost cable (protected by a black plastic tube) is used for the power to the printhead and is connected to X2 on the Power Supply board.
• The innermost cable (20-p blue flat cable) is used for data to the printhead and is connected to P41 (marked “TPH”) on the CPU board.
8.7 Printhead, cont'd.
Printhead
Bracket
Blue Connector
(to CPU Board)
White Connector
(to Power Supply)
“Finger”
“Finger”
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Chapter 8 Print Unit
Replacing the Printhead
The printhead is a consumable part subject to wear from both the thermal paper or transfer ribbon, and from the rapid heating and cooling process during printing. Thus, it will require periodical replacement depending on print volume, type of print media, amount of energy to the printhead, and several other factors.
To replace a defective or worn printhead, proceed as follows:
• Turn off the power.
• Open the front and right-hand doors.
• Turn the printhead lift knob to “Open” position.
• Remove any paper and/or transfer ribbon from the print unit.
• Carefully pull the printhead bracket away from the magnet in the lift arm.
In early manufactured printers, the magnet could come loose if excessive force was used to separate the printhead lift arm from the printhead bracket. If so, use a drop of Loctite 638 glue to fasten the magnet again. Let the glue dry with printhead in closed position. The glue requires 1 minute to dry, but full strength is not obtained until after 20 hours.
• Disconnect the hooked fingers at the rear of the bracket from the headlift shaft and pull out the printhead as far as the cables allow.
• Disconnect the two cables from the printhead.
Note the snap-lock on the white connector and pull at the connectors rather that at the cables!
• Connect the cables to the replacement printhead assy, blue connector to the left – white connector to the right.
For illustrated step-by-step instructions, please refer to the Maintenance chapter in the Installation & Operation manual.
8.7 Printhead, cont'd.
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Chapter 8 Print Unit
Replacing the Printhead, cont'd.
• Insert the printhead assy into the print unit, fitting the bracket's fingers over the headlift shaft. Check that the printhead can move freely up and down.
• Check so the cables will not interfere with the transfer ribbon or have become jammed between parts in the print unit.
• Turn the printhead lift knob to “Closed” position, so the magnet engages the printhead bracket.
• Turn on the power. The printer's firmware automatically meas­ures the printhead resistance at power-up.
• Load paper and, if so desired, transfer ribbon again.
Precautions
Some simple measures can be taken by the user to prevent prema­ture wear-out:
• Clean the printhead regularly, as described in the Installation &
Operation manual. Not only will a dirty printhead produce an inferior printout, but any residue on the dots will prevent heat to dissipate through the transfer ribbon and paper.
• Use original UBI transfer ribbons only. These are optimized
specifically for your printer. Inferior back coating on a non­approved transfer ribbon may cause residue which can com­pletely destroy the printhead.
• Follow the recommendations regarding Paper Type setup in the
Installation & Operation manual. Too much energy to the printhead will wear it out rapidly.
• Do not use higher Print Speed setting than necessary.
• Do not use a higher Contrast setting than necessary, especially
not in combination with the highest Paper Type Constant settings.
• Do not use a higher printhead pressure than necessary.
• Never print outside the paper width. Dots not in contact with the
paper will not be cooled properly.
• Use transfer ribbons wider than the paper (if available).
• When using a paper with less than full width, be careful to adjust
the printhead lift arm so there is an even pressure across the paper web. Not only will an uneven pressure impair the printout quality, but it may also prevent the dots from being properly cooled. Moreover, a sharp outer paper edge in direct contact with the printhead may cause excessive mechanical wear on some dots, which may be visible when printing on wider paper later.
• When using preprinted labels or labels with some type of varnish
or non-standard top coating for direct thermal printing, use original UBI labels or inks recommended by leading manufac­turer's of direct thermal paper. The labels should not contain any aggressive substances such as chloride or grinding substances such as titanium dioxide.
8.7 Printhead, cont'd.
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Chapter 8 Print Unit
8.8 Headlift Sensor
Description
The purpose of the headlift sensor is to detect whether the printhead is lifted or lowered. To avoid the risk of overheating the printhead dots, printing can not be performed when the sensor detects that the printhead is lifted (the paper serves to cool the printhead). An ever so slightly lifted printhead would also impair the printout quality. Thus, it is important that the printhead is properly lowered and a sufficient pressure is applied before the sensor detects a “Closed” condition.
The photoelectric sensor is attached to the electronics compartment side of the inner print unit gable by means of two #T10 Torx screws. When the printhead is lifted, a beam of light is interrupted by an arm connected to the headlift shaft. This is detected by the firmware so an error message (1022 “Head Lifted”) will be returned if you try to print a label. The headlift sensor is connected to P50 (marked “HEADL”) on the CPU board.
The arm that blocks the light through the sensor is attached to the headlift shaft by means of a #T10 Torx screw. If the screw is not tightened sufficiently or if the arm is not fitted in the correct angle, a malfunction will occur.
Adjusting the Sensor Arm
• Perform an adjustment of the printhead pressure as described in chapter 8.9.
• Without turning off the power, remove the cover over the electronics compartment (see Caution notice).
• Place a 1 mm (0.04") thick plastic card between the printhead and the pressing roller. Close the printhead and the locking arm.
• Loosen the #T10 Torx screw that holds the sensor arm.
• Run the program listed on next page.
• Move the sensor arm from open position towards closed position until the Error LED goes out, which indicates the correct position.
• Tighten the screw and check that the arm runs freely inside the fork-shaped sensor.
• Put back the cover and power cord and turn on the printer.
Sensor Arm
Headlift Shaft
#T10 Torx Screw
Sensor
“Printhead Closed” position
“Printhead Open“ position
CAUTION!
The electronics compartment contains
wires and circuits with dangerous
voltage (380V).
Take precautions to avoid short circuits
and electrostatic discharges.
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Chapter 8 Print Unit
8.8 Headlift Sensor,
cont'd.
Adjusting the Sensor Arm, cont'd.
Run this program to assist you in adjusting the headlift sensor arm: Error LED on = Printhead open. Error LED off = Printhead closed. The correct position is exactly when the Error LED goes out. You can break the program execution either by pressing <Shift> + <Pause> on the printer's keyboard or by transmitting the character X (uppercase!) from the host.
NEW 10 BREAK 1, 88 20 BREAK 1 ON 30 ON BREAK 1 GOSUB 1000 40 LED 1 OFF 50 WHILE (PRSTAT AND 1) = 0: WEND 60 LED 1 ON 70 WHILE (PRSTAT AND 1) = 1: WEND 80 GOTO 40 1000 BREAK 1 OFF 1010 END RUN
Sensor Replacement
Before replacing the sensor, check that the sensor arm is properly adjusted and that the sensor is free from dust, paper shreds and other things that can block the light.
Replace the sensor as follows:
• Turn off the power, remove the power cord and remove the cover over the electronics compartment.
• Check that the printhead is closed.
• Remove the #T10 Torx screw that holds the front of the sensor.
• Open the printhead.
• Remove the #T10 Torx screw that holds the rear of the sensor.
• Pull out the sensor and disconnect its cable from the CPU board.
• Reassemble in reverse order. The senor's cable should be con­nected to P50 (marked “HEADL”) on the CPU board.
• Check that the sensor works properly using a PRSTAT AND 1 statement, see UBI Fingerprint ≥7.11 Reference Manual.
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Chapter 8 Print Unit
8.9 Headlift Mechanism
Description
The headlift mechanism is an integrated part of the print unit. The mechanism is activated by the green printhead lift knob at the outside of the upper part of the print unit. The knob is pressed on a shaft, which has a disk with an eccentrically fitted pin on the inside of the upper, outer gable of the print unit. This pin activates a fork­shaped pressure adjuster, that via a linkage is connected to the headlift shaft. The pressure adjuster is fitted with a spring and an adjusting screw. Thus, the operator can easily apply more or less pressure of the printhead against the pressing roller depending on media, print method, paper thickness and other circumstances.
The headlift shaft is connected to the headlift sensor arm on the inside of the print unit (see chapter 8.8). On the headlift shaft, the S­shaped headlift arm is also fitted. At the tip of the headlift arm is a magnet that engages the printhead bracket. The arm can be moved along the headlift shaft, so the pressure can be applied laterally at the centre of the paper web, even when narrow paper is used. The hooked fingers of the printhead bracket are hung on the headlift shaft. The concept allows the printhead to align itself vertically to the pressing roller, while maintaining a fixed alignment in the other two dimensions.
Headlift Sensor
Headlift Arm
Pressure Adjuster
Linkage
Headlift Shaft
Eccenter
Printhead Lift Knob
Return Spring
Sensor Arm
Printhead Pressure
Grub Screw
(factory-adjustment)
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Chapter 8 Print Unit
8.9 Headlift Mechanism,
cont'd.
Printhead Pressure Adjustment
The pressure of the thermal printhead against the ribbon or paper is factory adjusted. However, the use of thicker or thinner paper than normal could require the printhead pressure to be readjusted.
Turn the adjustment knob clockwise for increased pressure, or counter-clockwise for less pressure. Print a few labels, preferably test labels, and check the printout. Increased pressure generally gives a blacker printout and vice versa. Repeat until the desired result is obtained.
To find the basic setting, proceed as follows:
• Remove the transfer ribbon (if any).
• Load the printer with full width paper. Close the printhead and
the locking arm.
• Adjust the headlift arm to centre position.
• Turn the green adjustment knob counter-clockwise until it feels
loose (no pressure left).
• Take up the slack in the green knob until you notice an increased
resistance.
• Using a 2 mm hexagonal key, loosen the factory adjustment grub
screw (see illustration on previous page) until the printhead starts to come up.
• Carefully tighten the grub screw until you just start noticing a
small resistance when trying to pull out the paper (see note).
• Apply some locking fluid on the grub screw.
• Lift and lower the printhead.
• Turn the knob 4 to 5 full turns clockwise. Each turn increases the
pressure by approx. 1 kp to a total of 4 – 5 kp (39.2 – 49.0 N).
• Fine-adjust by means of test labels and the trial-and-error
method (possibly after having loaded the transfer ribbon again).
IMPORTANT! Do not use a higher printhead pressure than necessary, because it may increase the wear of the printhead and thus shorten its life.
WARNING!
It is possible to apply very high
printhead pressure by means of the
factory adjustment grub screw, which
may damage the printhead, the
pressing roller and the headlift arm.
Adjustment Knob
(green)
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Chapter 8 Print Unit
8.9 Headlift Mechanism,
cont'd.
Printhead Pressure Alignment Adjust
The printer is factory-adjusted for full size paper width. When using paper less than full width, it is recommended to adjust the printhead lift arm so it becomes centred on the paper. Thereby, an even pressure across the paper is obtained.
A poorly adjusted lift arm may be detected by a weaker printout on the inner part of a less than full width paper. Similarly, when reverting to a wider paper, the arm should be adjusted, or the printout on the outer part of the paper could be weak.
To adjust the printhead lift arm, proceed as follows:
• Lift the printhead by turning the printhead lift knob to “Open” position.
• Remove the ribbon, if any.
• Loosen the knob that holds the lift arm. Move the arm inwards or outwards until the arrow on the tip of the arm becomes centre­aligned with the paper web.
If the arm is hard to move, pull the printhead bracket free from the magnet in the lift arm. Pull down the arm to a position between open and closed. Push at the inner part of the arm, where the locking knob is situated.
• After having centred the arm, lock it by tightening the knob.
• Reload the ribbon, if any.
Centre of Paper Web
Tip of Headlift Arm
Knob
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Chapter 8 Print Unit
8.10 Ribbon Return Roller
Description
The purpose of the ribbon return roller is to help the ribbon rewind unit to keep the transfer ribbon tight, thereby avoiding ribbon wrinkling, which could ruin the printout. The angle of the ribbon return roller relative to the printhead is adjustable.
The ribbon return roller is subject to very little wear and is expected to last as long as the printer as a whole. Replacement involves removing the belt and pulley as well as the upper, outer gable of the print unit (see illustration in chapter 8.9).
Adjustment
If the ribbon becomes wrinkled, a few checks should be performed before the ribbon return roller is readjusted:
• Is the printhead pressure properly adjusted?
• Is the green paper guide ring correctly positioned?
• Is there anything that may interfere with the transfer ribbon, e.g. the printhead cables.
If the wrinkling problem remains, proceed as follows:
• Using a #T20 Torx screwdriver, loosen the locking screw that runs in the crescent-shaped hole in front of the headlift knob.
• Insert the #T20 Torx screwdriver through the hole at the top of the upper print unit gable. The key will engage cogs in the plate that holds the outer end of the return roller inside the gable.
#T20 Torx Screwdriver
Ribbon Return Roller
Locking Screw
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Chapter 8 Print Unit
8.10 Ribbon Return Roller,
cont'd.
Adjustment, cont'd.
• By turning the Torx screwdriver, you can move the outer end of the roller back and forth:
- Turn it clockwise to move the end of the roller forward.
- Turn it counter-clockwise to move the end of the roller rear-
ward.
• If the ribbon gets wrinkled at the inner edge, you should move the end of the roller slightly rearward, i.e. rotate the screwdriver c.c.w. and vice versa.
• Select an appropriate layout, e.g. a test label, and print it repeat­edly while carefully moving the end of the roller back or forth, depending on which side the wrinkling has occurred.
• When the wrinkling ceases, continue the movement ever so slightly to create a small safety margin. The movement is best detected by the relation between the roller bearing and the hole through the upper gable.
Another method is to determine the positions where wrinkling starts at either side and adjust the roller to the middle.
• You will need to print several labels before a new adjustment has any noticeable effect.
• When you are satisfied that the problem is cleared, tighten the locking screw and test again by printing several more labels. Readjust if necessary.
Wrinkling Turn Screwdriver
Inner side counter clockwise Outer side clockwise
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Chapter 8 Print Unit
The Start and Stop Adjust parameters in the printer’s Setup Mode control how the paper will be positioned in relation to the printhead when the printing starts and after the printing is completed respec­tively. By default, the Start and Stop Adjust parameters are both set to 0, which is suitable for tearing of the paper web against the tear­off edge, e.g. between labels. However, since the dot line on the printhead is situated 15.7 mm back from the tear off edge, the printing will not start at the top of the label but about 15 mm further down the web.
Note that due to several factors, paper feed measurements are not exact and may vary somewhat between applications and individual printers. There is inevitable a small amount of slippage between paper and pressing roller, which in its turn is affected by the printhead pressure, the type of paper or backing paper, the thickness of the media, the type of ribbon etc. The pressing roller may be worn, giving it a slightly smaller diameter. There is also a certain amount on inexactness in the paper feed mechanics and belts and so on. Therefore, you cannot expect to reach exact Start and Stop Adjust values simply by calculation. Use the measurements given in this chapter to calculate rough starting points and use the trial-and-error method to find values that give the desired result.
In many cases, it is desired to start the printing immediately at the top of the label, i.e. at the edge that is fed out first. Actually, what you want to do is to pull back the paper to the dot line. You can do this by means of a negative Start Adjust value (e.g. -175 dots ≈ 15 mm). Be careful not to enter too large a value (>200 dots), or the paper may come loose from pressing roller.
8.11 Paper Feed Principles
Label Stop Sensor
Dot Line on Printhead
Tear Off Edge
15.7 mm
Tear off (print at top of label):
Start Adjust: -175 Stop Adjust: 0
Label Stop Sensor
Dot Line on Printhead
Tear Off Edge
15.7 mm
Default (Tear off):
Start Adjust: 0 Stop Adjust: 0
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Chapter 8 Print Unit
When using peel-off operation, the labels would drop from the backing paper and get stuck on e.g. the table if you use a Start Adjust value as large as -175. You should rather use a slightly smaller value so the rear edge of the label remains stuck to the backing paper, but not more than the label easily can be pulled away, manually or by an automatic applicator. Use a Stop Adjust value of around -60 (≈5 mm) to obtain that; i.e. after the printing is completed 5 mm less of paper feed than normal will be performed. However, if you still want to print from the top of the label, you must compensate by a Start Adjust value of -115 (≈10 mm). Note that the sum of the Start and Stop Adjust values always is 175 dots (15 mm), which equals the distance between dot line and tear off edge.
Cut off operation is another case where you have to use Start and Stop Adjust. The cutting edge of the cutter is situated approximately 35 mm in front of the dot line and 20 mm in front of the tear off edge. If you do not want to cut the label in two, you must use a Stop Adjust of around +250 dots (≈21 mm) to feed out the required extra 20 mm of paper web after the printing is completed and before the cutter is activated. Now, this means that you will start the printing well down the label, unless you compensate with a Start Adjustment of approximately -425 dots (≈35 mm). Note that the sum of the Start and Stop Adjust values is still 175 dots (15 mm).
A special case is tickets with black marks. It is recommended to place the black mark adjacent to the perforation or the intended tear off line. If the black mark is placed further down the web, this must be compensated for by a negative Stop Adjust setting.
8.11 Paper Feed Principles,
cont'd.
Label Stop Sensor
Dot Line on Printhead
Tear Off Edge
15.7 mm
Peel off (print at top of label):
Start Adjust: -115 Stop Adjust: -60
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Chapter 9 Paper Rewind Kit
Chapter 9
The backing paper rewind kit is an optional factory-installed device that makes it possible to auto-dispense self-adhesive labels from the backing paper (peel-off operation). The backing paper rewind unit consists of three main parts:
• A stepper motor that drives the rewind roller in the print unit and
the rewind unit. The rewind roller is fitted as standard even when no rewind kit is installed.
• A rewind unit that takes up the spent backing paper to be
manually removed in connection with next paper load.
Peel-Off Operation
The rewind unit can accommodate the backing paper from a full roll of labels.
9. Backing Paper Rewind Kit
9.1 Description
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Page 71
UBI EasyCoder 601 XP – Service Manual Ed. 1
71
Chapter 9 Paper Rewind Kit
The stepper motor is fitted to the printer's centre-line wall by means of a motor support plate. It drives the rewind unit and the rewind roller in the print unit via two belts. The tension of these belts can be slightly adjusted by moving the stepper motor and/or support plate before the screws are tightened.
The paper rewind unit is fitted with a brace, that holds the paper. The unit is fitted to the printer's centre-line wall by means of two #T20 Torx screws that can be accessed through holes in the CPU board (turn off the power first!).
A break shaft in front of the rewind unit guides the paper to be rewound under the slack absorber.
The stepper motor is connected to P421 on the CPU board, see chapter 15.3.
9.2 Main Parts
Tension Roller
Belt to Rewind Unit
Belt to
Rewind Roller
Stepper Motor
Motor Support Plate
Brace
Break Shaft
Backing Paper
Rewind Unit
Page 72
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 9 Paper Rewind Kit
The paper rewind unit is fitted to the printer's centre-line wall by means of a flange with two ball bearing. On the inner side, there is a gear wheel, which only can rotate in one direction due to an internal clutch. The wheel is held by means of a circlip.
On the outer side, the bobbin and its attached gable are fitted. The rotation is braked by means of a friction felt pad and a pressure spring. Thereby, it is possible to rewind paper manually without running the motor. The friction brake also takes up sudden jerks. A bobbin plate helps to hold possible rewind cores. The assembly is held together by a #T20 Torx screw at the end of the shaft.
If the rewind unit does not have enough strength to rewind the paper or to peel off the labels, it may depend on the friction felt having got dried out. Dismantle the unit and soak the felt pad in fresh motor oil. Remove excessive oil with a piece of tissue and reassemble the unit. The unwind torque should be 270–300 Nmm and the brake torque 15–45 Nmm1.
1
/. Refer to Appendix 2 for a de­scription of how to check the brake torque.
9.3 Paper Rewind Unit
Gear Wheel
Ball Bearings
Flange
Spring
Shaft
Carrier
Friction Washer
#T20 Torx Screw
Washer
Compression Spring
Nylon Washer
Slide Bearing
Bobbin
Friction Felt
#T10 Torx Screws
Bobbin Plate
Bobbin Gable
Grub Screw
Slide Bearing
Circlips
Page 73
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 10 Label-Taken Sensor
The Label-Taken Sensor (LTS) is an optional device, which enables the printer's firmware to detect if the latest printed label, ticket, tag etc. has been removed before printing another copy.
The label-taken sensor is usually factory-fitted, but it is also available as a kit for upgrading of existing printers by an authorized service technician. It cannot be fitted in combination with a paper cutter.
The label-taken sensor consists of a photoelectric sensor with a bracket and a connection cable. The sensor is fitted inside the front hatch, see illustration below.
The photoelectric sensor emits a narrow beam of light, which will be reflected back to the sensor by any label, ticket, tag, piece of strip or backing paper, that has not been removed from the outfeed area. A prerequisite is that the web is fed out along the inner wall of the printer.
The LTS is connected to P51 on the CPU board. The sensitivity of the receiver can be adjusted by means of the potentiometer WR51 and the intensity of the emitter by a strap on P55 on the CPU board.
The point of detection of the LTS is situated 10 mm (0.39") outside the inner edge of the paper web and 22 mm (0.87") in front of the dot line on the printhead.
Vertical detection range is adjustable from 5 mm (0.2") above the edge of the tear-off/dispenser edge to max. 50 mm (2") below the edge (with strap fitted on P55).
Chapter 10
10. Label-Taken Sensor
10.1 Description
Ready
Error
Pow
er
EasyCoder 601 XP
Print
3
6
8
9
.
7
Pause
Setup
Feed
Enter
2
1
0
C
5
4
F3
F4
F5
F1
F2
Shift
Label-Taken Sensor
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Chapter 10 Label-Taken Sensor
The Label-Taken Sensor Kit consists of:
• One Reflecting Sensor assy. with cable and connector
• One Sensor Bracket
• One Screw
• One Installation Instructions booklet The only tools needed are the combi Torx screwdriver delivered
with the printer and a small non-conductive flat-tipped screwdriver. The LTS must either be enabled by means of an LTS& ON
statement, or the status of the LTS has to be polled in the UBI Fingerprint program by means of the PRSTAT function, as other­wise the printer will not react on the LTS signal.
• Make a simple program that checks the printer's status, e.g.:
10 BREAK 1,88 20 BREAK 1 ON 30 ON BREAK 1 GOSUB 1000 40 FORMFEED 50 IF (PRSTAT AND 2) THEN BEEP 60 GOTO 50 70 END 1000 BREAK 1 OFF 1010 GOTO 70 RUN
You can break this program by transmitting the character X (ASCII 88 decimal) on the standard serial interface "uart1:".
• CAUTION! Turn off the power. For double security, pull the power cord out of the mains receptacle at the rear plate of the printer.
• Open the right-hand door and the front hatch, and remove the left-hand cover.
• In not already done before delivery, press the reflecting sensor assy. into the bracket as illustrated below.
10.2 Installation
Bracket
Sensor assy.
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Chapter 10 Label-Taken Sensor
Ready
Error
Power
EasyCoder 601 XP
Print
3
6
8
9
.
7
Pause
Setup
Feed
Enter
2
1
0
C
5
4
F3
F4
F5
F1
F2
Shift
• Using the screw included in the kit, fit the sensor/bracket assembly to the inner wall of the print unit as shown by the two illustrations below. Fit the cable underneath the top part of the bracket, as illustrated in the lowermost picture.
• Slip the cable of the label-taken sensor through the hole in the centre-line wall of the printer into the electronics compartment.
• Connect the cable to P51 on the CPU board. Be careful so the cable does not interfere with any moving mechanical parts or the transfer ribbon.
• Insert the power cord and turn on the power.
CAUTION! The electronics compartment contains high voltage wires and components. Use a non-conductive screwdriver to avoid the risk of causing a short-circuit!
10.2 Installation, cont'd.
Page 76
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 10 Label-Taken Sensor
Adjust the sensitivity of the label-taken sensor by means of the potentiometer WR51 (marked “LTS”) on the CPU board:
• Start up UBI Fingerprint and run the program described in chapter 10.2. Leave the label in the outfeed slot to create a label­not-taken condition.
• The printer should start to beep continuously. If not, turn the potentiometer back and forth until the beeping starts.
• Adjust the potentiometer WR51 so the beeping does not stop when the screw is turned a quarter of a turn in either direction.
• If necessary, fit or remove a jumper on P55 to change the intensity of the LTS emitter:
Jumper fitted = Higher intensity Jumper removed = Lower intensity
• Remove the label. The beeping should cease immediately.
• If necessary, readjust the potentiometer and/or change the strap on P55.
• Break the program by typing X on the host.
When the label-taken sensor works properly, put back the left-hand cover and close the front hatch and right-hand door. Then the printer is ready for operation.
10.3 Adjustments
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UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 11 Paper Cutter
Chapter 11
11. Paper Cutter
11.1 Description
The EasyCoder 601 XP can easily be fitted with an optional Paper Cutter unless the printer is not already fitted with an label-taken sensor (see chapter 10). The cutter unit is fitted on the same hinges as the front door, which it replaces, and is connected by a single cable to the DIN-connector on the printer’s front.
The paper cutter is available both as a factory-installed option and as a field-installable upgrading kit.
The paper cutter is intended to cut through continuous non-adhesive paper strip or through the backing paper between labels. It must not be used to cut through any kind of adhesive or other soft material, that may stick to the cutting parts and render the cutter inoperable – thus also causing possible damage to the electric motor.
Maximum paper thickness is 175 µm (≈ 175 grammes/m2) for normal paper-based materials.
Minimum practical copy length is 38.1 mm (1.5") The Paper Cutter increases the printer’s total weight by approx. 1.65
kgs (= 3.6 lbs) and its length by 28 mm (1.1"). The Paper Cutter can be tilted forward in order to facilitate cleaning
and paper load.
R
e
a
d
y
E
r
ro
r
P
o
w
e
r
EasyCoder 601 XP
P
rin
t
3
6
8
9
.
7
P
a
u
s
e
S
e
tu
p
F
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d
E
n
te
r
2
1
0
C
5
4
F
3F
4
F
5
F
1
F
2
S
h
ift
CAUTION!
The cutting edge will rotate to home position when the power is turned on and when the printer is rebooted. Always keep the cutter unit in closed position during operation.
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UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 11 Paper Cutter
The cutter is activated by CUT or CUT ON statements in the UBI Fingerprint program, see the UBI Fingerprint ≥7.11 Reference manual.
The rotating edge will cut through the paper approx. 37 mm (1.5") in front of the printer’s dot line. The paper feed should be adjusted accordingly.
The following values are recommended for cutting between labels and for cutting paper strip. In both cases, the start adjustment is calculated to allow the paper web be pulled back after cutting, so printing can start directly at the forward edge.
Start adjust .....................................: - 4 2 5
Stop adjust .....................................: + 25 0
Should the cutter inadvertently have been used to cut through any adhesive, you will have to clean the “knife”, which is a rotating shaft with an edge. Tilt down the cutter and use a piece of tissue moistened with isopropyl alcohol, or a similar solvent, to wipe clean the shaft.
Do not force the spring-loaded anvil blade open, which may damage the spring.
CAUTION!
Turn off the power or disconnect the cutter before cleaning. Keep fingers away from cutting parts! Do not force the spring-loaded anvil blade open more than 5–10 mm (.2–.4"), or the spring may be damaged.
12.2 Controlling the Cutter
11.3 Cleaning
Page 79
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 11 Paper Cutter
11.4 Installation
• Turn off the main switch and remove the power cord.
• Open the printer's front hatch.
• Hold the printer firmly and press the front hatch sideways to the left as to disengage the hinges.
• Remove the hatch completely.
• If the printer is fitted with a label-taken sensor (LTS), it has to be removed before the cutter can be fitted, see chapter 10.
• Fit the cutter unit to the vacant hinges. Make sure that the locking plate snaps into the groove of the right-hand hinge and that the angled plate at the bottom of the cutter is inserted under the printer's bottom plate.
• Fit the cable from the cutter unit into the DIN connector on the printer's front.
DIN Connector
Press Sideways
R
e
a
d
y
E
r
r
o
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P
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w
e
r
EasyCoder 601 XP
Print
3
6
8
9
.
7
P
a
u
s
e
S
e
t
u
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F
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d
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2
1
0
C
5
4
F3
F4
F5
F1
F2
S
h
i
f
t
Press Sideways
R
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a
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E
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P
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EasyCoder 601 XP
P
rin
t
3
6
8
9
.
7
P
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S
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2
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5
4
F
3
F
4
F
5
F
1
F
2
S
h
i
f
t
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UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 11 Paper Cutter
• Tilt the cutter unit upwards until it locks into place. If the cutter does not lock properly, the hinges of the cutter unit may need to be adjusted using a #T10 Torx screwdriver.
• Put back the power cord and switch on power. The cutter will perform an idle cycle in order to occupy its home position.
• Turn off the power. Tilt down the cutter and thread the paper through the cutter unit between the guide plates (see illustration above). Then tilt up the cutter again and lock it in closed position. Check that the printhead is lowered and turn on the power. Now the printer is ready for operation.
The spring that presses the anvil blade against the rotating shear may eventually get slack, especially if the anvil blade is forced open, e.g. during cleaning. A slack spring must be replaced as follows:
• Remove the right-hand gable of the cutter (two #T20 Torx screws).
• Remove the right-hand gable of the cutter mechanism (two #T20 Torx screws + three Posidrive screws).
• Replace the spring and assemble in reverse order, making sure to put back all the washers.
11.4 Installation, cont'd.
Hinge
Guide Plates
(insert paper between the plates)
Hinge
11.5 Spring Replacement
Page 81
UBI EasyCoder 601 XP – Service Manual Ed. 1
81
Chapter 12 Ribbon Low Sensor
Chapter 12
12. Ribbon Low Sensor
12.1 Description
As an option, the EasyCoder 601 XP can be fitted with a sensor, that detect the rotation of the ribbon unwind spool and updates a counter. By means of custom-made application program, the counter can be read and used to detect ribbon-low conditions (as opposed to out­of-ribbon conditions, which are supported by the standard error handling).
On the ribbon unwind spool, there is a code disc with 41 gaps. When the spool rotates, the photoelectric sensor detects when the light is interrupted and decrements a counter. The counter is set at power­up to a random value of approximately 65,000 and can be read using SYSVAR(13), see the UBI Fingerprint ≥7.11 Reference Manual.
The sensor requires no regular cleaning. However, should any malfunction be detected, blow the sensor clear from dust or paper residue before deciding to replace it.
The sensitivity of this sensor cannot be adjusted.
Ribbon Low Sensor
Code Disc
Page 82
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 12 Ribbon Low Sensor
• Open the right-hand door.
• Turn off the power and remove the left-hand cover.
• From the paper compartment side, insert the connector and cable through the square hole in the centre-line wall.
• Insert the sensor under the code disk of the ribbon unwind unit so the disc will run in the U-shaped slot between the receiver and transmitter. There is no need to dismount the ribbon unwind unit.
• Attach the sensor to the centre-line wall by means of one #T10 Torx screw. Check that the code disc can rotate freely.
• Connect the cable to P57 on the CPU board, see chapter 15.3.
• Put back the left-hand cover.
• Turn on the power and check that the sensor works by reading its values using a PRINT SYSVAR(13) instruction in UBI Fingerprint while manually rotating the ribbon unwind spool.
12.2 Installation
Ribbon Low Sensor
#T10 Torx Screw
NOTE!
The Ribbon Unwind Unit
does not need to be dismounted!
Page 83
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 13 Electronics Compartment
Chapter 13
13. Electronics Compartment
13.1 Introduction
The Electronics Compartment is off limits to the normal user, but for the authorized service technician, it contains a number of parts of great interest:
• The stepper motor and drive belts of the print unit and ribbon rewind unit.
• The headlift sensor.
• The brake of the ribbon unwind unit.
• Stepper motor and drive belts of the paper rewind unit.
• The CPU board.
• The Centronics interface board.
• The power supply unit.
• Optionally one extra interface board.
The CPU board is fitted inside the left-hand cover plate, which is held by a total of 8 #T10 Torx screws: 4 along the lower edge and another 4 under the top of the right-hand cover.
CAUTION!
Before removing the cover plate, make sure that the printer is turned off and that the power cord is disconnected. The power supply unit, that is fitted behind the CPU board, contains high voltage wire and circuits.
When fitting back the cover plate, press it forcefully inwards against the conductive leaf springs before tightening the screws. Check that the cover is properly aligned with the front and does not interfere with the right-hand door.
13.2 Accessing the Electronics Compart­ment
#T10 Torx Screws (4x)
#T10 Torx Screws (4x)
R
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a
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EasyC
od
er 601 X
P
P
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9
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2
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C
5
4
F
3
F
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F
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F
1
F
2
S
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Page 84
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 13 Electronics Compartment
13.3 Main Parts
This illustration shows the complete electronics compartment, but with the Centronics interface board removed to improve the view of the CPU board.
Ribbon Unwind Unit
CPU Board
Power Supply
(hidden)
Paper Rewind Motor Print Unit Stepper Motor
Ribbon Rewind Unit
Page 85
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 14 Power Supply
Chapter 14
14. Power Supply
14.1 Description
The Power Supply Unit (PSU) is situated in the electronics com­partment inside the CPU board.
CAUTION! Make sure that the printer is turned off and that the power cord is disconnected. The power supply unit
contains high voltage wire and circuits.
To gain access to the PSU, first remove the CPU Board, which is held by one #T20 Torx screws to the rear plate (below the RS 232 connector) and one #T10 Torx screw at each of the upper corners.
The PSU is held to the rear plate by two #T20 Torx screws, and to the centre-line wall by the more #T20 Torx Screws accessible from the media compartment. The PSU is connected by two cables; one to the CPU board and another to the printhead.
The power supply unit is primary-switched with power correction factor controller so as to comply with the CE regulations, which require a sinus-shaped load curve. It is designed for input voltages in the range of >90 – <240 V AC, 45 – 65 Hz without any manual switch. The unit delivers 175 W continuously and about 400 W peak. It has a thermostat-controlled fan and overheating protection that switches the unit off at too high a temperature.
The PSU consists of the following main parts:
Mains: 90V - 264V AC 45 - 65 Hz
5.3V DC 24V DC P24V DC 42V DC
P24 Enable Power Fail
Power Supply Board
175W continuous
(≈ 400W peek)
Mains
Rectifier 42V
Rectifier 24V
Buck Converter
(24V ⇒ 5.3V)
Control Vout
(24V & 42V)
Forward
Converter
Booster
Converter
Pulse Width
Modulator
(w. Power Factor Contr.)
Pulse Width
Modulator
Forward
Temperature Control
&
Power Fail Interrupt
Page 86
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 14 Power Supply
Booster Converter
The booster converter transforms the AC mains voltage to 385 V DC by sensing the shape of the curve of the mains voltage and chopping it to short pulses, where the pulse amplitude follows the shape of the curve. The booster is protected by two 3.15 A fuses.
Forward Converter
The forward converter transforms 385 V DC to 24 V DC 0.3–5 A and 42 V 0.1–0.9A. The 24 V is used for the thermal printhead and the optional cutter unit and the 42 V is used for the stepper motor(s). The potentiometer R89 is used to trim the 24 V. Note that the 24 V must be loaded with at least 0.3 A before the voltage is stable enough to allow trimming.
Buck Converter
The buck converter transforms 24 V DC to 5.3 V DC 0.3 – 3 A which is used for the logics. On power supply unit 1-971601-27, the
5.3V can be adjusted by means of the potentiometer R146.
Fan
The cooling fan at the bottom of the power supply unit is controlled by a thermostat on the primary side cooler and will improve cooling and spread the heat in the entire machine to avoid local high temperatures.
Connections
X1 Mains supply >90 – <240 V AC, 45 – 65 Hz X2 Power to thermal printhead X3 Power to CPU board X4 Power to PSU fan
Miscellaneous
The power supply unit is also fitted with a switch that can shut off the 24 V to the printhead and cutter and a Power Fail Interrupt (PFI) signal that warns the logics that the power is about to be shut off. The high voltage and low voltage parts of the PSU is divided by a thick white line printed on the circuit board.
Troubleshooting
All voltages are available on test points on the CPU board, see chapter 15.5. If all voltages are present, but the 24 V is too high or low, load with at least 0.3 A and trim on R89.
Jarring sounds or repeated overheating interrupts at high-load printing (e.g. large black areas) in an otherwise faultless power supply indicates that the cooling fan may need to be replaced. It is fitted at the bottom of the PSU with four plastic screws and connected to X4.
If a fuse is blown, do not try to repair the PSU, but replace the entire unit!
14.1 Description, cont'd.
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UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 14 Power Supply
14.2 Components
1-971601-26 Power Supply Unit; Front Side 1-971601-27 Power Supply Unit; Front Side
Low Voltage High Voltage
Low VoltageHigh Voltage
FAN
Power to CPU Board
Power to Printhead
24 V Trim Potentiometer
Main SwitchMains Inlet
Chassis GND
1-971601-27 only
Page 88
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 14 Power Supply
14.2 Components,
cont'd.
1-971601-26 Power Supply Unit; Back Side 1-971601-27 Power Supply Unit; Back Side
1-971601-26 only
Page 89
UBI EasyCoder 601 XP – Service Manual Ed. 1
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Chapter 14 Power Supply
14.3 Schematics
1-971601-26 Power Supply Unit; Main Schematics 1-971601-27 Power Supply Unit; Main Schematics
V40
V24
12345678910111213141516171819202122232425
26
X3
R103
C23
14 3
L4A
V42
C22
R137
C21
V16
V19
R28
V13
V15
V3
V10
V11
C15
C8
Y
V2
34
76
L3
C10
C1
Y
R1
FH1
123
X1
MAINS
CONN
C2
X2
C3
Y
R2
R3
FH2
S1
C5
Y
C6
Y
R4
var
3
4
1
6
L1
C4
X2
R5
3
4
1
6
L2
C7
X2
C9
1NY
V1
R21
C19
R25
V12
C17
C16
C13 C14
13
42
T1
R26
R27
R29
V17
V18
V14
R35 R142
R143
C24
9
6
710
8
11
T2
V20
C26
R102
V41
12 2
L4B
R36
R38
C25
R140
R141
R134
R135
R138
Vin OK
P24EN
V5.3
R104
P24
+42V
+24V
1-971601-26 (2/4)
+24V
+5.3V
Comm.
V43
V22
R101
V40
R39
98
L4C
R34
V21
R127
C27 C28
R129
C54
Y
C55
Y
C20
C66
R133
R30
R31
R32
R33
C18
Y
C11
Y
C12
X2
R15
R16
R17
V4
R10
R11
R12
V37
C30
R6
R7
R8
V6V5V7
R9
C29
V52
C31
R18
R19
R20
V8 V9
R13
R14
R22
V38
V39
R70
R71
R72
V29
H1
R73
R74
R84
1
2
X4b
1
2
X4a
1
2
FAN1
R90 R91
R100
C63
12
TB1
C67
Common
P24
C56
123456789
10
X2
C49
R88
V32
R87
R124
C48
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REF
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R78
R85
R86
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R75
R76
R77
V31
C43
R99
V28
R55
R62
R63
R64
R65
R66
C39
R54
R49 R51
R52
V24
V25
V26
R53
R50
R40
R41
R42
R43
C34
R44
R46
V23
COMM1PKLMT2CAOUT3IS4XOUT5IAC6VAOUT7VRMS
8
REF9ENA
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VCC15OUT
16
N1
UC3854A
R47 R48
R56
C41
C42
R59 R60
R61
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R67
R68
R81
3
2
1
8
4
N3A
LM393D
R79
NTC
R106
C45
R69
V30
R83
C47
R94
R95
V35
C50
R89
R98R97
5
6
7
N5B
LM393D
3
2
1
8
4
N5A
LM393D
V48
V36
C52
H2
CNY17F-2
R96
V34
C51
R92
R93
V33
R105
5
6
7
N3B
LM393D
R109
R82
R80
R108
R107
R57
R58
V27 C38
C40
C35
C36 C37
C32
R45
C33
R145
C68
R144
R37
R126
CNY17F-2
++
+
++
+
+
-
+
-
+
+
+
-
+
-
+
-
-1
45°
+
+
Pulse Width Modulation Power Factor Controller
PWM PFC OTP Power Fail Interrupt
Control Vout
Buck Converter
PWM Forward
Power to
CPU Board
Power to
Printhead
C56 and C68 removed on 1-971601-27
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Chapter 14 Power Supply
14.3 Schematics, cont'd.
1-971601-26 Power Supply Unit; Buck Converter 1-971601-27 Power Supply Unit; Buck Converter
+24V
F3
R111 R112 R113 R119 R120 R121 R122 R123
C58
V53
V54
EAI1EAO2CS3VCC
4
OUT
5
GND
6
RAMP
7
REF
8
N6
UC3573D
C57
R110
V49
R128
V55
V44
R130
L5
V47
+5.3V
V46
R118
R115 R116
C60
V45
C65
C61C62
V50
V51
R131 R132
R114
R146
R117
C59
Comm.
1-971601-27 only
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Chapter 15 CPU Board
Chapter 15
The CPU board is a four-layer board with most of its circuits surface-mounted. On the front side is a combined circuit/GND layer , inside the laminate are a VCC layer and a circuit layer, and on the back side is a GND layer.
The hardware contains of the following main functions:
• A processor core.
• Stepper motor drivers.
• Thermal printhead driver.
• Sensor drivers.
• Peripheral units such as UART, Centronics, timers, etc.
• Flash memory SIMM for the firmware.
• DRAM SIMM
• Slave processor.
• Expansion bus.
15. CPU Board
15.1 Description
CPU
CORE
I2C-BUS
Clock
Support
Chip
Reset
&
Watchdog
I/O DATA
TPH
Logic
Timer
Stepper
Driver
Interrupt
Controller
Sensors
Memory
Card
Uart
Expansion
Bus
Flash
Memory
DRAM
Bar Code
Wand
Electronic
Key
Electronic
Key
Console
Optional
Board
Centronics
Slave Processor
A/D Converter
Electronic
Key/RTC
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Chapter 15 CPU Board
Components mentioned in this chapter are marked with grey in the drawing below.
Processor Core (IC10 & IC11)
The processor core consist of a 32 bit RISC processor (IC10) and a support chip (IC11). Do not try to remove the RISC processor.
Flash Memory (P20-P22)
There are three sockets for Flash SIMMs (ROM0 – ROM2). A SIMM (Standard In-Line Memory Module) must always be fitted in ROM-2, since this bank is the Boot-Bank. As standard, only one flash SIMM (2 Mbyte) is fitted. It contains the following sectors:
Device Size Sector Used for
c: 256 kbyte Intel VFM FOS Customer's programs, files, images etc.
256 kbyte Intel VFM FOS 256 kbyte TMP area (FOS)
rom: 256 kbyte Kernel UBI Fingerprint firmware, bar codes, standard
256 kbyte Kernel fonts, standard images, UBI Shell, auxiliary 256 kbyte Kernel programs1, setup values 256 kbyte Kernel 192 kbyte Kernel 16 kbyte TMP area Paper feed info, odometer value 16 kbyte Parameters 32 kbyte Boot Startup
1
/. The following standard auxiliary programs are included in the kernel: ERRHAND.PRG FILELIST.PRG MKAUTO.PRG
15.2 Circuits and Straps
IC11
IC304
IC305
P20P21P22 P23 P24
P32
P35
P83
P84
CONNECTORS FROM TOP
8=HEADL.
6=LSS-BOT
5=LSS-TOP
4=LTS
3=RI-END
2=RI-LOW
DEBUG
RI-END
LTS
DRAM0
DRAM1-2
ROM2
ROM1 ROM0
1-971600-01 P01
RTC & Program Key
Boot­Bank
IC10
IC11
P56 P55
P13
WR51 WR52
P34
IC 305
IC304
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Chapter 15 CPU Board
Flash Memory (P20-P22), cont'd.
The flash memory retains its content during power off without any battery backup. It consists of sectors that can be erased and written to over and over again. This is done automatically in the back­ground. At power-up, the flash memory is reorganized to avoid fragmentation. Before a sector is erased, its content will be copied to a TMP (temporary) area as a safety measure if something should go wrong, e.g. a power failure. Thus, there is a 256 kbyte TMP sector for the file operating system (device "c:") and a 16 kbyte TMP sector for the parameters sector.
The Boot sector is necessary for UBI Fingerprint to start. There is a boot sector in all flash SIMMs at delivery, but the firmware will only accept a boot sector of the SIMM fitted in P22 (marked “ROM2 Boot-Bank”). The boot sector is only protected when the flash SIMM is fitted in socket P22 (ROM2). If moving flash SIMMs from one CPU board to another, make sure that the SIMM contain­ing the boot sector is fitted in P22 (ROM2) on the other board, or the boot sector will be overwritten.
The UBI Fingerprint firmware, including all standard fonts, bar code generators and images, the UBI Shell startup program, the present setup values and some standard application programs1, are stored in four 256 kbyte and one 192 kbyte sectors. These sectors are called by a common name the “Kernel”.
As illustrated in the table above, 2 sectors with a total nominal capacity of 512 kbyte plus a 256 kbyte TMP sector are used for the Intel VFM (Virtual Small Block Manager) file operating system (FOS), where the user can store his programs, files, images, and fonts. Practically, around 500 kbyte are available to the user.
Exactly which fonts, images, files and programs are stored in FOS may vary between customers and applications.
The parameters sectors stores the current setup and odometer values and a few other “invisible” files with data, that are required for the printer to start up with the same settings as when it was shut off, e.g. information on the position of the label gaps vs the LSS.
The printer's permanent memory can be expanded by fitting one or two more flash memory SIMMs in sockets ROM1 and ROM0. Although identical to the flash SIMM in ROM2, all of the sectors can be used by the file operating system, except the 256 kbyte TMP sector. Thus, each additional flash SIMM will provide 1,792 kbyte extra storage memory. The Flash SIMMs are custom-made and can only be ordered from Intermec.
Flash Memory Available to the User (kbytes):
No of SIMMs ROM2 ROM1 ROM0 SUM
1 SIMM 512 – – 512 2 SIMMs 512 1,792 – 2,304 3 SIMMs 512 1,792 1,792 4,096
15.2 Circuits and Straps,
cont'd.
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Chapter 15 CPU Board
DRAM Memory (P23–P24)
The DRAM memory (Dynamic Random Access Memory) is the printer's temporary memory (device "tmp:"). It will lose its content when the power is turned off or at a power failure. Thus, it should only be used for data that can easily be recreated or that is only relevant for one power-on cycle. It is much faster than the flash memory. Therefore, at start up the kernel is copied from the Flash memory to the DRAM, where the various UBI Fingerprint instruc­tions are executed.
The DRAM is also used for the font cache and various buffers. The remainder is used for the two print image buffers where the bitmap patterns are stored prior to printing. One buffer is used for the label that is being printed, while the other receives the bitmap for next label as the UBI Fingerprint instructions are processed. By switch­ing between the buffers, batch printing without stopping between labels can be achieved.
There are two sockets for DRAM SIMMs on the CPU board. A DRAM SIMM must always be installed in socket P23 (DRAM0). As standard, one 4 Mbyte DRAM SIMM is fitted. The space available for the two image buffers gives a maximum label length of approximately 300 mm (11.8") regardless of print width.
The size of the buffers depends on two factors:
• Number of physical dots on the printhead (regardless of “Media; Width” and “Media; X-start” setup)
• Present “Media; Length” setup value in dots
Calculate the buffer size according to this formula:
(No of dots / 8 + 4) x (Media length in dots) = Buffer size in bytes (Buffer size in bytes) / 1024 = Buffer size in kbytes Buffer size in kbytes x 2 = Memory requirement in kbytes
Example: The number of dots on the printhead is 1984 The Media; Length is set to 1800 dots (150 mm) [[(1984 / 8) + 4) x (1800)] / 1024] x 2 = 886 kbyte total
If a larger print area is required, the DRAM memory can be expanded with a second DRAM SIMM in socket DRAM1-2. Technically, the CPU board allows up to 40 Mb of DRAM, but presently only 4 Mbyte SIMMs are kept in stock. Approved DRAM SIMMs can only be ordered from Intermec.
Electronic Key Circuit (P34)
The Dallas touch memory key in P34 contains the real-time clock (RTC) oscillator and a system key, that is required to run the stepper motors. If such a key is not fitted in P34, the printer cannot print, but will otherwise work as normal. The key has a built-in battery backup with a life of at least 10 years. When the printer is on, the circuit is power supplied via the CPU board and will not consume any power from the battery. The circuit also contains 4 kbit (500 bytes) of battery backed-up memory for the devices "lock:" and "storage:".
15.2 Circuits and Straps,
cont'd.
CAUTION!
The Electronic Key Circuit (P34) contains an
integrated lithium battery.
Replace only with original
Electronic Key Circuits from Intermec.
Dispose of used Electronic Key Circuits according to local regulations for lithium
batteries.
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Chapter 15 CPU Board
Electronic Key Circuit (P34), cont'd.
Since the communication between the RISC processor and the key circuit is comparatively slow, the content of the key circuit is copied to DRAM at startup and used from there. At power off, the content is read back to the key circuit, provided there is time enough. Thus, there is a small risk that new data may be lost, before it has been saved back to the key circuit. The original data in the key circuit will not be damaged, if the read-back process should fail.
Slave Processor (IC305)
The slave processor contains an A/D converter and controls the RTC interface, and the bar code wand interface (also see chapter
15.4).
RS 232 Driver (IC304)
The RS 232C driver circuit is socket-mounted to allow replacement if damaged. Part No. 1-956016-00.
LTS Emitter Strap (P55)
This strap decides the intensity level of the label-taken sensor (LTS) emitter (also see chapter 10): Jumper fitted: High intensity No Jumper: Low intensity
LTS Potentiometer (WR51)
This potentiometer decides the sensitivity of the receiver in the label-taken sensor (also see chapter 10).
Ribbon End Sensor Strap (P56)
This strap decides the intensity level of the ribbon end sensor emitter (also see chapter 7.4): Jumper fitted: High intensity No Jumper: Low intensity
Ribbon End Potentiometer (WR52)
This potentiometer decides the sensitivity of the receiver in the ribbon end sensor (also see chapter 7.4).
Debug Strap (P13)
This strap is used for debugging and program development and must always be fitted with a jumper during normal operation.
15.2 Circuits and Straps,
cont'd.
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Chapter 15 CPU Board
The following connectors on the CPU board are used in the printer for communication with various devices and sensors.
15. 3 Connectors
Top Edge:
P80 Power supply unit
Rear Edge (top to bottom):
P35 Bar code wand interface (see chapter 15.4) P33 Electronic keys (see chapter 15.4) P32 Serial RS 232C interface "uart1:", (see chap-
ter 16.2)
P25 Memory card adapter (see chapter 15.4)
Bottom Part:
P421 Stepper Motor 2 (paper rewind unit, option) P58 Cable to cutter interface on printer's front P31 Centronics interface board (see chapter 16.3)
Centre of Pcb:
P81 Optional interface board (see chapter 16.4 –
16.5)
P82 Presently not used
Front Edge (top to bottom):
P57 Ribbon low sensor (option) P52 Ribbon end sensor P51 Label-taken sensor (option) P53 Label stop sensor (upper part) P54 Label stop sensor (lower part) P50 Headlift sensor P37 Console pcb P41 Thermal printhead data P420 Stepper motor 1 (print unit)
IC11
IC304
IC305
P32
P35
P83
P84
CONNECTORS FROM TOP
8=HEADL.
6=LSS-BOT
5=LSS-TOP
4=LTS
3=RI-END
2=RI-LOW
RI-LOW
KEYB.
TPH
STM1
STM2
CUTTER
1-971600-01 P01
P420
P50
P37
P41
P54
P53
P51
P52
P57
P421
P58
P35
P82
P80
P31
P25
P33
P32
P81
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Chapter 15 CPU Board
15.4 Special Devices
Memory Card Adapter (P25)
The CPU board has a built-in memory card adapter which can use special flash memory cards from Intermec and SRAM cards complying with the Memory Card/JEIDA-4 standard. It is not suited for other types of memory cards!
Memory cards are only detected by the firmware at startup and must thus be inserted in the memory card adapter before the power is switched on or the printer is rebooted.
Important!
Memory cards must only be inserted or removed when the power is off.
Flash Memory Cards
There are three types of flash memory cards. All such cards are referred to as device "rom:" in UBI Fingerprint.
• Font Cards Must be present in the printer's memory card adapter before the font stored in the card can be used.
• Font Install Cards Install additional fonts in the printer's memory. These fonts can be used without the card being present.
• Firmware Cards Install a new firmware kernel in the printer incl. possible standard fonts.
JEIDA-4 PC Memory cards
There are two types:
• DOS-formatted memory cards Such cards can be both read from and written to. In UBI Fingerprint they are referred to as device "card1:".
• Non DOS-formatted memory cards Such cards are read-only and are referred to as device "rom:" in UBI Fingerprint.
Backside
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Chapter 15 CPU Board
Electronic Key Interface (P33)
The printer is prepared to use up to three different electronic keys. In addition to the electronic key fitted in P34 on the CPU board (see chapter 15.3), one or two keys can be inserted through a slot in the printer's rear plate and thus be connected to P33 on the CPU board.
The electronic keys are Dallas touch memory circuits with built-in battery backup that can be programmed to add or lock out function­ality in the printer or the installed software. The expected life of the backup battery is at least 10 years.
There are a number of different types of keys with different properties. Some have a non-volatile memory, which can be read from or written to, some have a run-time clock with expiration capabilities, while others have special password-protected memory areas.
A key may contain up to 16 different key items. There are two types of functions:
• Lock, which locks or unlocks specified features in the printer or in the software. For example, a key may be required to unlock a custom-made application program (copy-protection). If com­bined with a run-time clock, it could e.g. allow use of a demo program for a limited period of time.
• Storage, which is used to store short files of data.
Electronic keys for various purposes can be ordered from Intermec.
15.4 Special Devices,
cont'd.
Electronic Key
CAUTION!
Electronic Keys contain an integrated lithium
battery.
Replace only with original
Electronic Keys from Intermec.
Dispose of used Electronic Keys according
to local regulations for lithium batteries.
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Chapter 15 CPU Board
15.4 Special Devices,
cont'd.
Bar Code Wand Interface (P35)
The printer is prepared for connection of a bar code wand via a connector on the CPU board accessible through a slot in the printer's rear plate. The bar code wand is primarily intended for reading Code 128 bar codes with setup information, but other types of informa­tion could also be read.
If the Code 128 bar code contains FNC3, the data will be treated as a setup string and will change the printer's setup accordingly. A setup bar code may contain a combination of up to 3 or 4 setup parameters. Each parameter is specified by a setup id (e.g. 00 = "Ser­com,uart1,baudrate") and setup data. The setup data can be a number referring to an item in a list of options (e.g. 05 = baudrate
9600), an unsigned number, or a signed number. A checksum is
calculated automatically. Refer to the UBI Fingerprint ≥7.11 Reference Manual for more
information on how to produce setup bar codes. When a bar code has been successfully read, the printer will
acknowledge by emitting a short beep signal. If no FNC3 character is found in the bar code, the data will be stored
in a buffer which could be read by the "wand:" device. The buffer is small, so it is recommended to use short bar code data (max. 16 characters) and read the buffer regularly to avoid overflow. For more demanding applications or for reading bar codes other, choose a regular bar code scanner from Intermec's wide product range and connect it to the serial port.
EasySet Bar Code Wand
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Chapter 15 CPU Board
15.5 T est Points
The CPU board is provided with test points that allow all currents from the power supply to be tested.
Test Points:
GND Ground V 5.3 Feed voltage for V5.0, approx. 5.3V V 5.0 Logic power, 5V ± 5% RESET High level = active printer V24 Feed voltage for P24, 24V ±5% P24 Printhead and cutter voltage, approx. 24V when active V40 Feed voltage for stepper motors, 42V ±10%
IC11
IC304
IC305
P32
P35
P83
P84
V40
GND
POWER
KEYB.
5.3V
VCC
P24
V24
/RESET
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