Olivetti CMS 140 B euro User manual

CMS 140 B
SERVICE MANUAL
Cash Register

PUBLICATION ISSUED BY:
Olivetti Lexikon, S.p.A.
Documentazione
77, Via Jervis - 10015 Ivrea (Italy)
Copyright © 1998, by Olivetti
All rights reserved

686770R Service Manual iii
PREFACE
This manual is addressed to the field engineers who will install and service the CMS 140B cash register.
It provides all the information needed for a correct product maintenance.
SUMMARY
This manual is divided into seven chapters.
Thefirstthreechaptersdescribetheoperating,functionalchecks,andmaintenanceandrepairprocedures.
Chapter 4 describes the disassembly and adjustment procedures. Chapters 5, 6 and 7 describe the electronic
circuitry, schematics and diagram and assembly construction.
PREREQUISITES
The topics described in this manual require knowledge of similar products.
REFERENCEDOCUMENTATION
InstructionManual-(providedwith theproduct)
SparePartsCatalogue
DISTRIBUTION:General
FIRST EDITION: December 1998

686770R Service Manual v.
CONTENTS
1.OVERVIEW.................................. 1-1
1.1TECHNICALSPECIFICATIONS..... 1-2
2.SPECIFICATIONS AND
OPERATINGPRINCIPLES......... 2-1
2.1SPECIFICATIONS......................... 2-1
2.1.1 Features................................... 2-1
2.1.2 Specifications........................... 2-1
2.1.3 Mechanisms............................. 2-2
2.2OPERATING PRINCIPLES........... 2-3
2.2.1 Transmission/SelectMechanism 2-3
2.2.2 SensorMechanism................... 2-7
2.2.3 PrintingMechanism.................. 2-8
2.2.4 InkingMechanism..................... 2-9
2.2.5 PaperFeedingMechanism....... 2-10
2.2.6 PrintCycleInitialization............. 2-12
3.HANDLING,MAINTENANCE....... 3-1
3.1HANDLING THE PRINTER........... 3-1
3.1.1 PrecautionsonPrinterHandling 3-1
3.1.2 PaperInstallation...................... 3-2
3.1.3 InkRollerInstallation................ 3-3
3.2MAINTENANCE............................. 3-4
3.2.1 Cleaning.................................. 3-4
3.2.2 Inspection................................. 3-4
3.3LUBRICATION............................... 3-4
3.3.1 Lubricant Types....................... 3-4
3.3.2 Lubrication Points.................... 3-4
3.3.3 List of lubricants....................... 3-4
3.4PROBLEMRESOLUTION.............. 3-5
3.5PRINTERPINASSIGNMENTS...... 3-7
3.6TIMINGCHART.............................. 3-9
4.DISASSEMBLY PROCEDURE/HOW
TO LOCATE THE ASSEMBLIES 4-1
4.1HOWTO LOCATETHE POWER
ASSEMBLY.................................... 4-1
4.2THE REMOTE BATTERIES/
LOCATION OF ON/OFF SWITCH.4-2
4.3MACHINE DISASSEMBLY -
REASSEMBLY............................... 4-3
4.3.1 MachineCase........................... 4-3
4.3.2 Printer Unit............................... 4-3
4.3.3 Main Board and Display.......... 4-4
4.3.4 Paper Feed Motor.................... 4-4
4.3.5 Battery Compartment............... 4-5
4.3.6 Keypad..................................... 4-5
5.BLOCK STRUCTURE CHART... 5-1
5.1 CIRCUITRY.................................... 5-1
6.SCHEMATICS AND DIAGRAMS 6-1
6.1SYSTEM BLOCK DIAGRAM.......... 6-1
6.2POWERSUPPLYCIRCUIT............ 6-2
6.3RESETCIRCUIT............................ 6-3
6.4POWERFAILCIRCUIT.................. 6-3
6.5DISPLAYCIRCUIT......................... 6-4
6.6KEYBOARDCIRCUIT.................... 6-5
6.7BUZZERCIRCUIT.......................... 6-6
6.8BATTERYCIRCUIT....................... 6-6
6.9PRINTERCIRCUIT........................ 6-7
6-10 SCHEMATICDIAGRAM................. 6-9
7.ASSEMBLY CONSTRUCTION... 7-1

686770R ServiceManual 1-1
1. OVERVIEW
Fig. 1-1 Overall View of the Cash Register

1-2 ServiceManual 686770R
1.1 TECHNICALSPECIFICATIONS
Type: Electronic cash register with 8 departments
Display: Brightdouble displaywith16x6mmnumbers, errorsymbol,change,subtotal,minus,
total and quantity
Display capacity: 9 digits
Printer: ECR exclusive serial printer
Paper supply: 57 mm wide wood-free single ply tape
Memory protection: Approx. 3 months after power interruption with 4 1.5 V Mignon batteries
Technology: CMOS RAM
Power supply: AC Adapter
InternalBattery
Line voltage: 220 V
Powerconsumption: Stand-by 2.2 W; operating 4 W
Operatingtemperature: 0° to 40° C
Dimensions: Depth 425 mm, Width 325 mm, Height 210 mm
Weight: Approx. 6 Kg

686770R Service Manual 2-1
2. SPECIFICATIONSAND
OPERATING PRINCIPLES
2.1 SPECIFICATIONS
2.1.1 FEATURES
TheMicroPrinterisdesignedforusewithcalculators.
It offers the following features:
• Ultra-compactandlightweightdesign.
• Movable type for sharp printing quality.
• High printing speed using a mechanism that can
return the carriage from any column position.
• Silentprinting.
• Quickfeedingand paper free functions.
• Can run on size AAA manganese batteries (low-
powerdrive).
• Usesordinarypaper.
• Requiresnomotorspeedcontrol.
2.1.2 SPECIFICATIONS
The main printer specifications are listed below.
Print method
Serialprintingwithmovable type
Carriagewidth
Maximumof13printablecolumns(including2symbol
columns)
Characterposition
On symbol column side: 12 positions + 2 empty
positions
On numeric column side: 14 positions
Character size
1.6 (W) x 2.8 (H) mm
Intercharacterintervals
Betweennumerics: 2.1 mm
Between a numeric and a symbol: 2.6 mm
Linespacing
4.6 mm
Printspeed
Averageprintingspeedat6.0VDC,13-columnprinting:
Typically 0.7 I/s
6-columnprinting: Typically 1.4 I/s
Paper (supplied by the user)
Type: Regularpaperroll
Size: Width 57.5 mm ± 0.5 mm
Rolldiameter: 80 mm or less
Thickness: 0.06 ~ 0.085 mm
Average weight: 47 g/m2~ 64 g/m2(40 ~ 55 kg/
1000 sheets/1091 x 788 mm)
Paper feeding
Typically 4.3 Ips. Fast paper feeding is also possible,
andapaperreleasemechanismisprovided.
Inking
Ink roller method
Ink roller life: 700,000 characters
Standard: IR-30(IR-40is alsoapplicable)
Motor
Terminalvoltage: 6.0 VDC
Average current: Approximately 0.14 A
(during 13-column, 7-character
shift printing at 6.0 VDC,
25°C/77°F)
Sensor
Mechanical point of contact
Reset signal R, Timing signal T, and Sub-timing
signal t
Triggercoil(electromagnet)
Terminalvoltage: 6.0 VDC
D.C.resistance:16.7Ω(at25°C/77°F)
Connectionmethod
Jumperwire onprinterside
Guaranteedoperatingtemperature
0° - 40°C / 32° - 104°F
(guaranteed printing temperature:
5° - 40°C/41° - 104°F)
Reliability
MCBF: 300,000columns
Externaldimensions
86 (W) x 58.4 (D) x 19 (H) mm
(3.39 (W) x 2.30 (D) x 0.75 (H) inch)
Weight
Approximately80 g(0.21Ib)

2-2 Service Manual 686770R
2.1.3 MECHANISMS
Thisprinterconsistoftwoprintwheels,ahammer,and
acarriageequippedwithaninkroll.Itisaserialprinter
withmovabletype,anditprintsbysequentiallymoving
thecarriage acrossfromthe lowest-order column.
Whenthemotorisactivated,thegeartrainsrotateand
cause the print wheels and detection wheel to rotate.
Whenthetriggercoilchargedbyasignal(corresponding
a character) output from the sensor, a character is
selected,theprintwheelstops,theprintgearisrotated
by the action of the planet gear, and a character is
printed.
Fig. 2-1 Exterior View
The carriage then shifts to the next column (column-
shift operation). When charge to the trigger coil is
extendedduringcharacterselectionattheendofaline,
printingisperformedandthecarriageisreturnedtothe
initialcolumn.Thepaperisthenfedforwardtocomplete
the printing of one line.
Thisprinterconsistoffivemechanism:thetransmission
andselect,defection,print,inking,andpaperfeeding.
Fig. 2-1 shows an external view of the Micro serial
Printer. For details on the operating principles and
handling of each mechanism, see Subsection
2.2 Operating Principles , and Chapter 3 Handling
and Maintenance .