Olivetti ECR 7900 User manual

Cash Register
ECR 7900
SERVICE MANUAL
Code Y108540-8

PUBLICATION ISSUED BY:
Olivetti S.p.A.
10015 Ivrea (Italy)
Gruppo Telecom Italia
Via Jervis, 77- 10015 Ivrea (ITALY)
www.olivetti.com
Copyright© 2008, Olivetti
All rights reserved
ATTENZIONE
Pericolo di esplosione se la batteria non viene sostituita in modo corretto.
Sostituire solo con un tipo uguale o equivalente raccomandato dal costruttore.
Eliminare le batterie usate seguendo le istruzioni del costruttore.

Y108540-8 ECR 7900 Service Manual I
CONTENTS
MAJOR FEATURES...................................................................................................1
ECR 7900 CASH REGISTER COMPONENTS..........................................................2
CASH REGISTER SPECIFICATIONS .......................................................................3
SAFETY PRECAUTIONS........................................................................................................4
MAINTAINING THE CASH REGISTER...................................................................................4
UNPACKING AND SETTING UP THE CASH REGISTER.........................................5
STANDARD ACCESSORIES ..................................................................................................5
THE KEYPAD FOR ECR 7900...................................................................................6
KEYPAD FUNCTIONS.............................................................................................................6
OPERATOR AND CUSTOMER DISPLAYS...............................................................9
SWITCHING THE OPERATOR DISPLAY ON.........................................................................9
SWITCHING THE OPERATOR DISPLAY 0FF........................................................................9
SYMBOLS AND MESSAGES..................................................................................................9
PROGRAMMING MODE – Operator Display.........................................................11
PRINTER COMPARTMENT.....................................................................................12
1. PRODUCT OUTLINE...........................................................................................15
1-1. HARDWARE...................................................................................................................15
1-2. DISPLAY......................................................................................................................... 15
1-3. KEYBOARD ...................................................................................................................16
1-4. DRAWER........................................................................................................................ 17
1-5. PRINTER........................................................................................................................ 18
1-6. INTERFACE.................................................................................................................... 18
1-7 SYSTEM BLOCK DIAGRAM .......................................................................................... 19
2. TROUBLE SHOOTING GUIDANCE....................................................................19
2. TROUBLE SHOOTING GUIDANCE....................................................................20
3. CIRCUITRY..........................................................................................................21
3-1 POWER SUPPLY CIRCUIT.............................................................................................21
3-2. TRANSFORMER WIRING DIAGRAM............................................................................ 23
3-3. M30842MC MICROCOMPUTER..................................................................................24
3-4. RESET CIRCUIT ............................................................................................................ 27
3-5. POWER FAIL CIRCUIT .................................................................................................. 28
3-6. WINDING MOTOR CIRCUIT ..........................................................................................28
3-7. DISPLAY CIRCUIT ......................................................................................................... 30

II ECR 7900 Service Manual Y108540-8
3-8. DISPLAY INFORMATION............................................................................................... 32
3-9. KEYBOARD CIRCUIT.................................................................................................... 33
3-10. DRAWER CIRCUIT.......................................................................................................34
3-11. BUZZER CIRCUIT........................................................................................................ 35
3-12. BATTERY CIRCUIT......................................................................................................36
3-13. EXTERNAL MEMORY.................................................................................................. 38
3-13-1. SRAM (BS62LV4006SCP-70)........................................................................... 38
3-13-2. FROM (S29AL004D70TFI010) ......................................................................... 40
3-14. PRINTER CIRCUIT.......................................................................................................43
3-15. INTERFACE CIRCUIT..................................................................................................46
4. DIAGNOSTIC SOFTWARE..................................................................................48
4-1. DIAGNOSTIC CHECK & FINISHED GOODS CHECK................................................... 48
4-2. SOFTWARE VERSION CHECK.....................................................................................56
5. INSTALLING SOFTWARE...................................................................................58
5-1.USB driver install ........................................................................................................... 66
6. ASSEMBLY INSTRUCTION.................................................................................73
6-1. TOP CASE UNIT ............................................................................................................73
6-2. Display unit ASSY......................................................................................................... 80
6-3. Bottom case unit ASSY ................................................................................................ 83
8. CIRCUIT DIAGRAM.............................................................................................93
9. EXPLODED DIAGRAM......................................................................................101

Y108540-8 ECR 7900 Service Manual III
PREFACE
This Service Manual is addressed to the field engineers who will install and service the cash
register. it also provides product maintenance guidelines.
SUMMARY
This manual Is divided into five chapters.
The first two chapters describe the operating, functional checks and maintenance
procedures.
Chapter 3 describes the disassembly and reassembly procedures, Chapter 4 gives
troubleshooting/repair
information while Chapter 5 describes the electronic circuitry.
PREREQUISITES
The topics described in this manual require knowledge of similar products.
REFERENCE DOCUMENTATION
• Instruction Manual - (provided with the product)
• Spare Parts Catalogue
DISTRIBUTION:General
LAST EDITION: January 2008

Y108540-8 ECR 7900 Service Manual 1
MAJOR FEATURES
•99 departments that can be grouped into up to 10 merchandise categories;
•Up to 3,000 Price Look-Ups (PLU) with the possibility of associating a department and tax
status to each;
•15 clerk numbers to monitor the sales of individual employees with programmable Clerk
security system;
•Maximum 12,000-line internal Electronic Journal memory, substantially expandable via
SD card;
•Thermal printer with journal record or receipt printing capabilities;
•PLU creation for barcoded articles and barcode programming;
•Cash register programming via computer;
•Quantity entries using decimal point;
•Training mode facility with related password;
•Replaceable keycaps;
•Receipt on/off capabilities;
•Programmable names for departments, department (merchandise) groups, clerks, PLUs,
foreign currencies and payment media;
•Customer sales receipt header and footer personalization and logo creation via PC;
•Special rounding capabilities for Swiss, Danish and Swedish and Euro currencies;
•Detailed department programming;
•4 foreign currency exchange rates with reIated currency descriptors;
•Cash, check, charge card and 6 other credit card tender media keys, with change
tendered on all payments; 4 different VAT rates, with temporary override;
e Sales transaction hold and recall function;
•Battery back-up protection for sales transaction and programming data;
•Programmable clerk operating limitations for enhanced security;
•Payment transfer from one payment media to another after transaction completion;
•Single-line customer display with programmable scrolling messages;
•LCD operator display with Menu system f or accessing all cash register functions;
e Optional passwords for Manager mode, X report mode and Programming/Z report
modes;
e PLU rapid inquiry key;
e PLU fast programming key;
e Programmable VAT details printing on sales receipts;
e Multi-lingual interface f or customer receipts, management reports and display messages
in Danish, Dutch, English, French, German, Portuguese, Spanish and Swedish;
e User-defined captions in any language for printing on receipts and reports;
e Keypad personalization through reassignment of keys;
•Programmable key sequences executed by actioning single chain function keys;
•Sales function selection via pop-up Iists;
•Barcode reader connectivity.

2 ECR 7900 Service Manual Y108540-8
ECR 7900 CASH REGISTER COMPONENTS
With reference to figure:
1. Customer display.
2. Operator display.
3. Keypad.
4. Cash drawer and box.
5. Cash drawer lock and slot.
6. Item deposit drawer.
7. Power cord.
8. Storage Device (SD) - under printer compartment cover.
9. Printer compartment cover with receipt output window.
10.USB interface for connecting the computer for cash register programming. See
the note below.
11.RS232 serial interface for barcode reader.
NOTE: From the company website you can download the software
needed to program the cash register directly from your computer.

Y108540-8 ECR 7900 Service Manual 3
CASH REGISTER SPECIFICATIONS
Technical Characteristics
Listed below are the technical characteristics of this cash register model.
Type: Electronic cash register with clamshell thermal printer, 10 departrnent groups, 99
departrnents, 15 derks, up to 3,000 PLU settings. Max. 12,000-line Electronic
Journal internal memory, expandable via memory storage device. Removable cash
drawer.
Displays: 160x80 dot, tiltable, Operator LCD for displaying all transaction data with menu
system for cash register programming. 1 0-digit Client alphanumeric display.
Symbols for change, subtotal, minus, total, foreign currency value, department
number and item count shown.
Capacity: 8-digit input and readout
Printer: 24-column line thermal printer with drop-in paper loading.
Paper supply: 58.5 ± 0.5 mm thermal paper.
Batteries: 3 standard ‘ AA’ size batteries which safeguard
memory contents in the event of power failures.
Technology: CMOS RAM.
Powercons. Standby 12.1 W, Operating4l.8W.
Operating 32 — 104°F (0°C —40 °C)
Temperature:
Dimensions: 10 mm (W) x 430 mm (D) x 294 mm (H)
Weight: 9,9 Kg (21,82 lbs)

4 ECR 7900 Service Manual Y108540-8
SAFETY PRECAUTIONS
The power socket for this cash register must be Iocated near the machine and must be easily
accessible.
Do not use this cash register outdoors in the ram or near any Iiquid.
MAINTAINING THE CASH REGISTER
Provided below is information on how to maintain the cash register.
Note: Before cleaning the cash register, make sure it Is powered off and/or unplugged from
the wall outlet. Before unplugging the cash register from the wall outlet, make sure
that three charged AA standard backup batteries are installed in the battery
compartment. All data stored in memory will be cancelled if you unplug the cash
register from the electrical wall outlet without back-up battery supply.
1. Keep all liquids away from the cash register so as to avoid spills which could damage
the electronic components.
2. To clean the cash register firstly turn it off and/or unplug it from the wall outlet (be sure
the back-up batteries are installed), then use just a damp cloth. Do not use corrosive
substances such as solvents, alcohol, petrol, or abrasive components.
3. Il the cash register is stored in extreme hot or cold temperatures (0 °C – 40 °C), allow
the temperature inside the cash register to reach room temperature before turning it on.
4. DO NOT attempt to pull the paper tape when the cash register Is printing or when you
are loading paper. Always use the [Feed] key to feed paper. Pulling the paper tape
could damage the print mechanism.