Digital Equipment LB12, LB15 Field Support Manual
FBS Slip & Passbook Printer
LB12/LB15
Field Support Manual
Part Number: EK-A0685-SV002
FBS Slip & Passbook Printer
LB12/LB15
Field Support Manual
Acknowledgments
IBM, PC, AT and ProPrinter are registered trademarks of International Business Machines
Corporation.
Related manuals
LB12/LB15 Field Support Manual (including MSF) EK-LB125-SM
LB12/LB15 User’s Guide EK-LB125-UG
APP 6390 HSI (Hardware Software Interface) Manual AA-PYSXB-TE
APP 6390 Application Programmer's Guide AA-PTGWB-TE
APP 6390 Available Emulations Reference Manual AA-PYSWB-TE
This is a publication of DIGITAL EQUIPMENT BCFI AB
Printers and Peripherals
S-175 29 JÄRFÄLLA, Sweden
© Digital Equipment BCFI AB, 1997
All rights reserved. Reproduction in whole or in parts is prohibited without written consent of
the copyright owner. We have taken great care to ensure that the information in this manual
is correct and complete. However, if you discover any errors or omissions, or if you wish to
make suggestions for improvements, you are welcome to send your comments to us. Digital
Equipment BCFI AB disclaims any liability resulting from the use of this information and
reserves the right to make changes without notice.
Publication number: EK-A0685-SV002
First edition, issued October 1997 (all pages marked 9710)
CONTENTS LB12/LB15 FIELD SUPPORT MANUAL
Chapter 1 GENERAL DESCRIPTION
Chapter 2 FUNCTIONAL DESCRIPTION
Chapter 3 MAINTENANCE
Chapter 4 SITE PREPARATION
9710 LB12/LB15 Field Support Manual i
WARNINGS, CAUTIONS AND NOTES
WARNING!
This type of safety instruction is used where there is potential danger of injury to personnel
and/or damage to the equipment or the environment. The symbol inside the triangle
indicates the type of danger.
CAUTION!
This type of safety instruction is used where injury to personnel and/or damage to the
equipment or the environment can occur, if related instructions are not followed.
NOTE!
Notes are used to provide important or explanatory information.
9710 LB12/LB15 Field Support Manual ii
CHAPTER 1 GENERAL DESCRIPTION
Pages 1-1 through 1-20
Section 1.1 INTRODUCTION
1.1.1 Printing characteristics..............................................................................................................1-3
1.1.2 Information feedback.................................................................................................................1-4
1.1.3 Maintenance aspects................................................................................................................1-4
1.1.4 Power ON/OFF..........................................................................................................................1-4
1.2 REMOVING THE COVER
1.3 THE DESIGN CONCEPT
1.4 TECHNICAL DATA
1.4.1 General print characteristics ....................................................................................................1-7
1.4.2 Document station......................................................................................................................1-8
Print area on vouchers...................................................................................................1-9
Print area on passbooks..............................................................................................1-10
Book thickness.............................................................................................................1-15
1.4.3 Power supply ..........................................................................................................................1-15
1.4.4 Diagnostic tests.......................................................................................................................1-15
1.4.5 Environmental conditions........................................................................................................1-15
1.4.6 Miscellaneous .........................................................................................................................1-16
1.4.7 Position Detection Facility.......................................................................................................1-16
1.4.8 Communications interface.......................................................................................................1-16
1.5 MAGNETIC STRIPE FACILITY
1.5.1 Design ..........................................................................................................................1-17
1.5.2 Performance ..........................................................................................................................1-19
1.5.3 Encoding technique.................................................................................................................1-19
1.5.4 Specifications 1-19
MSF read/write.............................................................................................................1-19
Printer dimensions with MSF device installed..............................................................1-19
Vertically folded passbooks .........................................................................................1-20
Horizontally folded passbooks.....................................................................................1-20
.............................................................................................................Page 1-3
.........................................................................................................1-5
..........................................................................................................1-6
...................................................................................................................1-7
..............................................................................................1-17
Figure
Table
1-1 The LB12/LB15 printers, exterior ..............................................................................................1-3
1-2 Removing the cover ..................................................................................................................1-5
1-3 Printer modules.........................................................................................................................1-6
1-4 Print area on vouchers..............................................................................................................1-9
1-5 Print area on vertically folded
1-6 Print area on vertically folded
1-7 Print area on horizontally folded passbooks ...........................................................................1-14
1-8 Measuring passbook thickness...............................................................................................1-15
1-9 The main parts of the MSF device ..........................................................................................1-18
1-10 Dimensions of vertically folded passbooks .............................................................................1-20
1-10 Dimensions of horizontally folded passbooks.........................................................................1-20
1-1 Print measurements on vouchers .............................................................................................1-9
1-2 Print measurements on vertically folded type A passbooks....................................................1-11
1-3 Print measurements on vertically folded type B passbooks....................................................1-13
type A
passbooks....................................................................1-10
type B
passbooks....................................................................1-12
9710 LB12/LB15 Field Support Manual 1-1
1-2 LB12/LB15 Field Support Manual 9710
1.1 INTRODUCTION
The LB12 and LB15 Slip & Passbook Printers provide multi-functional document processing
in all-purpose workstations.
Figure 1-1 below shows the LB12/LB15. The printer is equipped with a
that can print on different types of documents such as single sheets, form sets, passbooks,
and passports, inserted horizontally through a slot at the front.
The document station can handle both vertically and horizontally folded passbooks or
passports. Printing is uni-directional or bi-directional and characters can be printed rotated
###
90
or upside down.
document station
1.1.1 Printing characteristics
On the LB12/LB15 printers, printing can take place at a speed of up to 300 characters per
second in both directions. The printer maintains the highest possible print speed by
automatically calculating the shortest possible route to the next print position. The position
of the 18-needle printhead can be controlled by the application program. The printer can
operate in its own Native mode or emulate an IBM ProPrinter III or IBM 4722.
When running in Native mode, the LB12/LB15 can use two character fonts and several
national character sets, including OCR-A and OCR-B fonts in PROMs. Other PROMs
providing logotypes and special character sets are optional. Additional character sets can
also be downloaded to the printer by the application program. When ProPrinter mode is
selected, the printer can use all the standard IBM ProPrinter III character generators.
A Position Detection Facility (PDF) can be used to find the left document edge.
Figure 1-1 The LB12/LB15 printers, exterior
9710 LB12/LB15 Field Support Manual 1-3
1.1.2 Information feedback
The LB12/LB15 printers return a large amount of essential information to the application
program, including:
• printer configuration
• number of characters printed
• true status of execution
• error codes.
1.1.3 Maintenance aspects
The mechanical design is such that field replaceable modules can be replaced within five
minutes with no need for mechanical adjustments. The printers also have extensive built-in
test programs, significantly reducing the time spent on repairs.
1.1.4 Power ON/OFF
To reduce the amount of heat generated by the printer, the operator can switch the printer
from ON to STANDBY mode (and vice versa) by using the ON switch at the front of the
printer. The LB12/LB15 can also be switched OFF from the application program. The ON
switch, however, overrides software-controlled switching. The ON LED illuminates when the
printer is switched ON.
WARNING!
There is high voltage inside the PSU even when the printer is switched
off. REMOVE the power cable before you dismantle the PSU.
1-4 LB12/LB15 Field Support Manual 9710
1.2 REMOVING THE COVER
1. Remove the front cover and the
document guide (see the
User's Guide
2. Press the lid release button (a).
3. Raise the lid (b) until the lid support
(c) snaps into the locked position.
4. Press the left side of the cover
backward whilst, at the same time,
lifting the cover latch (d) slightly,
using a screwdriver or similar tool.
With the latch lifted, pull the left side
of the cover forward a few
millimeters. Repeat on the right hand
side.
).
LB12/LB15
5. Pull the cover straight towards you as
far as possible (e).
6. Raise the cover as shown (f) and
remove it (g).
Figure 1-2 Removing the cover
9710 LB12/LB15 Field Support Manual 1-5
1.3 THE DESIGN CONCEPT
Each printer unit is built up between two side plates, joined by a base plate and various
bars and rods. The unit rests on a bottom plate (r) joined to the printer unit by means of two
screws. Rubber bushings and dampers reduce the transmission of vibrations to the bottom
plate and hence the printer cover.
The printhead (ac) is mounted on a carriage. The above parts and ink ribbon cassette (ae)
are all part of the rotary print unit (ad), which can rotate such that the printhead can be in
either a horizontal or a vertical position.
When a document is fed horizontally into the document station, the document stops against
a row of raised stop pins (y). Two optical sensors in the document station (t) detect that a
document is inserted and that it is in the correct position. The sensors are connected to the
document sensing board (t). A motor (not shown) lowers four pressure rolls (z) and removes
the stop pins. Four feed rolls, one under each pressure roll, feed the document into the print
position above a lower print bar (not shown).
Three optical sensors (s) are mounted on the outside of the right side plate. The upper
sensor senses when the rotary print unit is in the horizontal position. The middle sensor
detects when the printhead is in its extreme right position. The print unit cannot rotate
unless the printhead is in this position. The bottom sensor senses the position of the
pressure rolls and the stop pins. All sensors are connected to the document sensing board
(t) via optical fiber cables.
The ON lamp (v) and the ON-OFF switch (u) are mounted on the document sensing board
(t).
As a safety measure, printing cannot take place while the lid is open. An exception to this is
when the built-in tests are run.
Figure 1-3 Printer modules
The lid release mechanism (x) is mounted on the two shafts at the front. In addition to
raising the lid, this mechanism also handles the locking and release of the rotary print unit
in the LB12.
The main board (l) is mounted between the printer mechanism and the bottom plate (r). The
setup panel (i) can be replaced by an optional diagnostic panel.
1-6 LB12/LB15 Field Support Manual 9710
1.4 TECHNICAL DATA
1.4.1 General print characteristics
Print method
Emulation
Print modes
Matrix
Resolution
Print speed Matrix Maximum print speed
Character pitches
(single-pass printing) Vertical 144 dots/inch.
Native mode Matrix Pitches
9x12 10, 12, 15, 16.5cpi
Impact dot matrix, 18-needle printhead.
IBM ProPrinter III
IBM 4722.
Alphanumeric, semi-graphics, graphics.
9x12, 18x36 (NLQ single pass), 18x72 (NLQ single pass, OCR)
Right character inclination (italic style) is available under software
control.
Horizontal 720 dots/inch.
Flash 514cps
Draft 300cps (Draft)
NLQ Up to 130cps
OCR-A, OCR-B 80cps
Fastfont 360cps
18x36 10, 12, 15, 16.5cpi, and proportional
18x72 10, 12, 15, 16.5cpi, and proportional
OCR-A 10cpi
OCR-B 10cpi
Flash 17.1cpi
ProPrinter and 4722 modes Matrix Pitches
9x12 10, 12, 17.1, 20cpi, and proportional
18x36 10, 12cpi, and proportional
Fastfont 12
Number of characters Pitch (cpi) Characters
per line
Input buffer
Standard character sets in PROM
Other character sets
(line length = 203mm) 10 80
12 96
15 120
16.5 132
5.5KB = approximately 5500 characters.
Native mode
ProPrinter and 4722 modes
Courier and Gothid type faces (NLQ 18x36 and DATA 9x12
qualities), always included in the printer.
ASCII Italian
German Swedish
British Norwegian/Danish
French Portuguese
Spanish Swiss
Code pages 437 and 850.
Other typefaces, fonts, logos etc. can be added as PROMs or
downloaded from the system.
9710 LB12/LB15 Field Support Manual 1-7
1.4.2 Document station
Voucher dimensions
Passbook dimensions
Thickness
Paper weight
Width 90—235mm.
Height 67mm minumum (single sheet). The maximum
print height is 286mm, starting 4mm from the
upper edge.
Thickness 2mm maximum (original + 4 copies).
Width 100—235mm.
Height 75mm minimum. Maximum print height is
185mm from upper edge.
Quality 50—70 g/m², 0.08—0.16mm.
Other paper qualities must be tested.
OCR printing requires OCR specified paper
quality.
See description on Page 1-15.
Single voucher 45—110 g/m², 0.08—0.30mm
Voucher set 1 original: 45—90 g/m², 0.08—0.12mm.
4 copies: 40—60 g/m² each, 0.06—0.10mm.
4 carbons: 20-28 g/m² each.
Note If four copies are used, the lower
values must be followed. The binder
for the set can be placed on any side
or at the top.
Document feed
Single line (1/6”) 50ms.
Max. speed 0.4m/s = 95 lines/second.
1-8 LB12/LB15 Field Support Manual 9710
Print area on vouchers
H
W
PW
Document height 297 279 67 (See
Document width 210 216 90 235
Print width
(= leftmost print position)
RM
LM
PH
TM
Right margin 3 3 3 NA
Left margin 3 10 3 NA
Print height 287 269 61 291
Top margin (from top edge to top of
characters)
BM
Bottom margin (bottom edge to base of
characters)
NA = Not Applicable
Figure 1-4 Print area on vouchers
Measurement A4
(mm)
206 206 97 206
444NA
666NA
Letter
(mm)
Min.
(mm)
Max.
(mm)
Note)
Table 1-1 Print measurements on vouchers
The maximum document height is 318mm when using bottom synchronization, starting
4mm from the upper edge. The document height is infinite when using top synchronization
but PH is also maximized for top synchronization.
9710 LB12/LB15 Field Support Manual 1-9
The above measurements include the binder (20mm wide) on either the short or long edge
in a form set. If the binder is placed on the right side, this reduces the line length. The
maximum number or lines is reduced if the binder is placed at the top.
Print area on passbooks
Both vertically and horizontally folded books can be used. Two types of vertically folded
passbooks can be specified:
• Type A Height is 122mm or more. Upper edge to be inserted first.
• Type B Height is less than 122mm and the book has cut inner pages. Lower
edge to be inserted first.
* No restrictions if pages are flipped over.
Figure 1-5 Print area on vertically folded
type A
passbooks
See the measurement table on the next page.
1-10 LB12/LB15 Field Support Manual 9710
Measurement Printing (mm)
Min. Max.
H
HI
PH
PW
RM
LM
TM
BM
FL + FR
Book thickness NA 3.2
NA Not applicable
Height (no cut inner pages) 75 NA
Height, inner pages 75 NA
Print height 4 185
Print width NA 206
Right margin 3 NA
Left margin 3 NA
Top margin 4 NA
Bottom margin 8 NA
Fold margins 6 + 6 NA
Table 1-2 Print measurements on vertically folded type A passbooks
IMPORTANT !
The function of the document feed mechanism must be verified before books of different
widths are used in the same printer.
See Chapter 3, Maintenance, for information about adjusting the pressure rolls.
9710 LB12/LB15 Field Support Manual 1-11
The book is turned upside down to ease paper feeding. The text is rotated 180°.
* No restrictions if pages are flipped over.
Figure 1-6 Print area on vertically folded
type B
passbooks
See the measurement table on the next page.
1-12 LB12/LB15 Field Support Manual 9710
Measurement Min
(mm)
Max.
(mm)
H
HI
PH
PW
RM
LM
TM
BM
FL + FR
Height 75 NA
Height, inner pages 75 NA
Print height NA NA
Print width NA 206
Right margin 3 NA
Left margin 3 NA
Top margin 4 NA
Bottom margin 8 NA
Fold margins 6 + 6 NA
Book thickness NA 2.5
NA Not applicable
Table 1-3 Print measurements on vertically folded type B passbooks
IMPORTANT !
The function of the document feed mechanism must be verified before books of different
widths are used in the same printer.
See Chapter 3, Maintenance, for information about adjusting the pressure rolls.
9710 LB12/LB15 Field Support Manual 1-13
* No restriction if pages are flipped over.
Figure 1-7 Print area on horizontally folded passbooks
IMPORTANT !
The function of the document feed mechanism must be verified before passbooks of
differing widths are used in the same printer.
See Chapter 3, Maintenance, for information about adjusting the pressure rolls.
1-14 LB12/LB15 Field Support Manual 9710
Book thickness
The thickness should be measured with a force of 200 N/m2 distributed over the passbook
surface.
1.4.3 Power supply
Figure 1-8 Measuring passbook thickness
Input voltage
Power dissipation
Power consumption
ON/OFF mode control
Input circuit fuse
Output voltage
1.4.4 Diagnostic tests
Automatic test
Other tests
1.4.5 Environmental conditions
87—132 V or 180—264 V, 50 or 60Hz auto ranging.
ON mode, not printing: 20 W
ON mode, printing: 150 W (peak load)
115 V 1.5 A
220 V 0.7 A
Manually, using switch on front panel.
One fast-acting, glass tube fuse, 6.3x32mm, 4 A.
+5.2 V, +36.5 V, and –12.5 V.
A power-ON test is performed at transition from standby to
ON mode. This test includes RAM and PROM tests,
movement of mechanical modules, checking of sensors, etc.
See Chapter 3,
Maintenance
.
Temperature
Operating +10— +35°C.
Storage –40— +70°C.
Humidity
Operating 20—80% RH, non-condensing.
Storage 20—90% RH, non-condensing.
9710 LB12/LB15 Field Support Manual 1-15
1.4.6 Miscellaneous
Dimensions
Width 398mm.
Height, front LB12: 172mm; LB15: 192mm.
Height, back LB12: 195mm; LB15: 215mm.
Depth 300mm.
Weight
Acoustic noise
Operating Less than 60 dBA under any sound power level printing condition.
Standby Less than 40 dBA sound power level.
Ribbon
Type Cassette with endless loop. The ribbon is twisted 180° inside the
Length 2 x 28m (effective length).
Width 12.7mm.
Expected life More than 4x106 characters. With OCR printing, more than
1.4.7 Position Detection Facility
Detects the left document edge.
(See also Chapter 4,
LB12: 14kg.
LB15: 15kg.
cassette on each turn.
2.8 x 106 characters. The lower value is due to a higher degree of
inking.
Site Preparation
.)
1.4.8 Communications interface
See the
LB12/LB15 User's Guide
.
1-16 LB12/LB15 Field Support Manual 9710
1.5 MAGNETIC STRIPE FACILITY
The MSF (Magnetic Stripe Facility) is a device in the LB15 printer. This device enables the
printer to read and write a track of magnetically encoded characters positioned on the back
cover of a passbook.
1.5.1 Design
The main part of the MSF device is a read/write (R/W) head that can be moved sideways in
a wide slot at the bottom of the document path. A black plastic panel covers the slot when
the head is in its home position on the right side. The panel moves away, exposing the head
during the read/write operation.
Passbooks must be inserted manually into the document station, aligned with the right side
of the insertion slot. The book must be open with the printable pages facing upward and the
outside of the cover downward. The magnetic stripe is then positioned as far as possible to
the right.
The MSF mechanics are built into the bottom plate assembly (see Figure 1-9).
The main MSF parts are:
• MSF logic board "piggy-back" mounted on the main board.
• Document guide with increased height (standard MSF version or MSF version with
operator panel).
• Printer bottom plate assembly with increased height compared to the bottom plate used
in the LB12
• Interconnecting cables between the MSF mechanics and the MSF logic board.
9710 LB12/LB15 Field Support Manual 1-17
Figure 1-9 The main parts of the MSF device
1-18 LB12/LB15 Field Support Manual 9710
1.5.2 Performance
Data recording is performed in accordance with the DIN 32744/ISO 8484 standards.
Usually, data recording is carried out in accordance with the DIN 32744 standard, which
means that a string of maximum 48 characters is written twice (i.e. the basic string followed
by a duplicate) in a single track on the magnetic stripe.
Recording in accordance with the ISO 8484 standard means either that a string of up to 108
characters is written or that a string of up to 48 characters is written twice (i.e. as defined by
the DIN 32744 standard).
Non-standard start and stop sentinels can be selected from the application.
Read after write is always performed to check that the string has been recorded correctly.
After a duplicate recording, both strings (or records) are read and compared to ensure that
they are equal.
Reading and writing is performed while the R/W head moves at constant speed. Writing is
performed when the R/W head moves from right to left whereas reading can be performed
in any direction.
1.5.3 Encoding technique
The encoding technique used is the F/2F encoding system, which allows serial recording of
self-clocking data. This means that the data string comprises both data bits and clock
signals. A flux transition occurring between clocks signifies a ONE, whereas the absence of
such a flux transition signifies a ZERO.
The data is recorded as a continuous sequence of characters with no inter-character gap.
The data string is both preceded and followed by at least 20 synchronizing ZERO bits. In
the event of of duplicate recording, the inter-record gap consists of at least 60 ZERO bits.
1.5.4 Specifications
MSF read/write
Packing density
Read/write speed
Return speed
Number of tracks
Number of characters
Character I/O format
Parity
Transaction time
Printer dimensions with MSF device installed
210 bits per inch ±5%.
8 inches per second.
8 inches per second.
1.
108 maximum (excluding pre- and post-amble).
5 bits (4 data + 1 parity bit), LSB first.
Odd.
2.5 s approx. (2 forward + 2 backward movements).
Height, front
Height, back
Document guide depth
9710 LB12/LB15 Field Support Manual 1-19
197mm.
215mm.
96 mm.
Vertically folded passbooks
Inner pages can be shorter than the passbook cover.
Figure 1-10 Dimensions of vertically folded passbooks
Horizontally folded passbooks
Inner pages must not be smaller than the passbook cover.
Figure 1-11 Dimensions of horizontally folded passbooks
1-20 LB12/LB15 Field Support Manual 9710
CHAPTER 2 FUNCTIONAL DESCRIPTION
Pages 1-1 through 1-40
Section 2.1 MAIN FUNCTIONAL PARTS
2.1.1 Document grasp and feed mechanisms....................................................................................2-3
Pressure rolls mechanism .............................................................................................2-4
Stop pin mechanism ......................................................................................................2-4
Home position................................................................................................................2-5
Inserting a document against the outer stop pins..........................................................2-5
2.1.2 Rotary print unit.........................................................................................................................2-8
2.1.3 Lateral carriage movement .......................................................................................................2-9
2.1.4 Ribbon feed ..........................................................................................................................2-10
2.1.5 Rotary print unit release and locking.......................................................................................2-11
2.1.6 Printhead-to-paper distance control (PDC) mechanism..........................................................2-12
Mechanism design.......................................................................................................2-12
Head attach and release..............................................................................................2-13
Auto calibration............................................................................................................2-15
Document printing........................................................................................................2-15
Passbook printing ........................................................................................................2-16
PDC cam wheel...........................................................................................................2-16
Sensor element............................................................................................................2-18
2.1.7 PDF - Position Detection Facility.............................................................................................2-19
2.1.8 Main board ..........................................................................................................................2-19
General........................................................................................................................2-19
Carriage motor drive circuits........................................................................................2-20
Stepper motor control and drive circuits ......................................................................2-20
Power ON/OFF logic....................................................................................................2-20
2.1.9 Capacitor board.......................................................................................................................2-20
2.1.10 Printhead board.......................................................................................................................2-20
2.1.11 Opto sensors ..........................................................................................................................2-20
General........................................................................................................................2-20
PDF sensor..................................................................................................................2-22
Sensor calibration........................................................................................................2-23
2.1.12 Joint board ..........................................................................................................................2-23
2.1.13 PSU and voltage Indicator......................................................................................................2-23
2.1.14 Diagnostic panel (optional)......................................................................................................2-24
2.1.15 Set-up panel ..........................................................................................................................2-24
..........................................................................................Page 2-3
2.2 PRINCIPLES OF PRINTING
2.2.1 Printhead ..........................................................................................................................2-27
2.2.2 Character formation ....................................................................................................... .........2-27
2.2.3 Character repertoires and character sets................................................................................2-28
2.2.4 Character sets.........................................................................................................................2-29
2.2.5 Character generation ...................................................................................................... ........2-29
2.2.6 Graphic character representation............................................................................................2-32
2.2.7 Logotypes ..........................................................................................................................2-32
2.2.8 IBM ProPrinter III emulation....................................................................................................2-32
2.3 STEPPER MOTOR DRIVE PRINCIPLES
2.3.1 General ..........................................................................................................................2-33
2.3.2 General motor drive principles................................................................................................2-33
2.3.3 Stepper motor drive in the LB12/LB15 printers.......................................................................2-35
2.4 NEEDLE FIRING PRINCIPLES
2.5 FIRMWARE STRUCTURE
2.6 MEMORY USAGE
..................................................................................................................2-36
...................................................................................................2-27
...............................................................................2-33
..............................................................................................2-35
......................................................................................................2-35
9710 LB12/LB15 Field Support Manual 2-1
2.7 MAGNETIC STRIPE FACILITY ..............................................................................................2-37
2.7.1 Mechanics ..........................................................................................................................2-37
2.7.2 Electronics ..........................................................................................................................2-38
Reading........................................................................................................................2-38
Writing..........................................................................................................................2-39
Control register ............................................................................................................2-39
Configuration/status register........................................................................................2-39
Stepper motor control ..................................................................................................2-39
Figure 2-1 Document feed mechanism......................................................................................................2-3
2-2 Pressure rolls mechanism.........................................................................................................2-4
2-3 Stop pin mechanism..................................................................................................................2-4
2-4 Feed rolls and stop pins in home position.................................................................................2-5
2-5 The document being fed in........................................................................................................2-5
2-6 The feed motor starting to feed in the document ......................................................................2-6
2-7 Lowering the rear pressure rolls................................................................................................2-6
2-8 The front pressure rolls raised to let the document pass on its way out ...................................2-7
2-9 Front pressure rolls lowered to complete the document release ..............................................2-7
2-10 The document station ready for another document ..................................................................2-8
2-11 Print unit position sensor (V-H sensor) .....................................................................................2-9
2-12 Carriage drive mechanism ........................................................................................................2-9
2-13 Ribbon drive mechanism.........................................................................................................2-10
2-14 Carriage in its extreme right position releases the print unit ...................................................2-11
2-15 Printhead-to-paper distance mechanism in document position ..............................................2-12
2-16 Printhead-to-paper mechanism in book position.....................................................................2-13
2-17 Head attach position for passbook printing.............................................................................2-14
2-18 Head release short position ....................................................................................................2-14
2-19 Home position (= head release long)......................................................................................2-14
2-20 The PDC cam wheel ...............................................................................................................2-16
2-21 PDC sensor output voltage .....................................................................................................2-17
2-22 PDC sensor element...............................................................................................................2-18
2-23 Light-reflecting opto-sensor.....................................................................................................2-21
2-24a Light-breaking opto-sensors....................................................................................................2-21
2-24b Document edge opto-sensor...................................................................................................2-21
2-24c AIF opto-sensor........................................................................................................... ............2-21
2-25 Opto-sensor logic.................................................................................................................... 2-22
2-26 Diagnostic panel......................................................................................................................2-24
2-27 LB12/LB15 block diagram.......................................................................................................2-25
2-28 Printhead needle arrangement................................................................................................2-27
2-29 Character formation in high quality printing.............................................................................2-27
2-30 Character formation at 300cpi print speed..............................................................................2-28
2-31 Character repertoires and character sets................................................................................2-29
2-32 Character code table layout ....................................................................................................2-30
2-33 Code extension principles.......................................................................................................2-31
2-34 Selecting a character set......................................................................................................... 2-32
2-35 Simplified description of the stepper motor function ...............................................................2-34
2-36 MSF mechanics ......................................................................................................................2-37
2-37 Data read signal timing diagram .............................................................................................2-38
2-38 MSF block diagram .................................................................................................................2-40
Table 2-1 Printhead positions and related CPU commands ...................................................................2-13
2-2 Memory configuration..............................................................................................................2-19
2-3 Memory usage ........................................................................................................................2-36
2-2 LB12/LB15 Field Support Manual 9710
2.1 MAIN FUNCTIONAL PARTS
This chapter starts with a description of the main mechanical and electromechanical
functions. This will give you a good understanding of the interface between the electromechanics on the one hand, and the electronics and the hardware-software interactions on
the other hand. This is followed by an overall description of the circuit board assemblies and
the connected devices. The chapter concludes with descriptions of the mechanical and
electronic functions of the Magnetic Stripe Facility.
2.1.1 Document grasp and feed mechanisms
These mechanisms control the insertion, grasping, bi-directional transport, and release of
documents inserted into the document station.
The document feed motor drives the front and rear feed rolls. The front and rear pressure
rolls can be lowered to press the document against the feed rolls when the document is to
be grasped and fed in either direction. A line of stop pins helps the operator to align the
document. Both the pressure rolls and the stop pins are controlled by the grasp motor (not
shown). A sensor outside the printer's right side plate (not shown) senses the current
position of the stop pins.
The document station has the following document sensors (not shown) ensuring that the
document is in the correct position before document feeding starts:
• outer edge sensor positioned just outside the outer stop pins
• right-edge sensor
• Automatic Insertion Function (AIF) sensor.
Figure 2-1 Document feed mechanism
The thumbwheel near the setup/diagnostic panel can be used to retrieve a document that
has become trapped inside the printer.
9710 LB12/LB15 Field Support Manual 2-3
Pressure rolls mechanism
The mechanisms for the pressure rolls and the stop pins are shown in more detail in the
following two figures.
A cam wheel with two grooves controls both mechanisms. The grasp motor turns the cam
wheel, via a toothed belt, to six clearly-defined positions. One of the grooves moves the
outer pressure rolls (grasp rolls) up and down via an arm (A). The other groove controls the
inner pressure rolls via another arm (B). If you need to remove a jammed document, you
can lift the outer pressure rolls further by pressing the release lever down.
Stop pin mechanism
A third arm (C), which follows the same groove as arm (A), directly controls the movement
of the stop pins. This arm also controls the stop pins via a tension spring. When the stop
pins are lowered, the upper part of arm (C) interrupts the light in the opto-sensor (D) which
signals to the CPU that the document path is free.
Figure 2-2 Pressure rolls mechanism
Figure 2-3 Stop pin mechanism
2-4 LB12/LB15 Field Support Manual 9710
Home position
The figure below shows the basic position of the relevant mechanisms. The pressure rolls
(A) and (B) are lifted, and both the outer and inner stop pins (C) are raised.
The application knows which type of document is to be inserted and may have informed the
operator by means of an on-screen message. Alternatively, the operator may have informed
the application, via the keyboard, regarding the type of document he or she is going to
insert.
Figure 2-4 Feed rolls and stop pins in home position
Inserting a document against the outer stop pins
Thin documents, such as forms and vertically folded passbooks, should be inserted against
the outer stop pins, as shown below.
Figure 2-5 The document being fed in
9710 LB12/LB15 Field Support Manual 2-5
Loading...