Sam4s ER-420 Series Troubleshooting guide

ER-420 Series
Operation and
Program Manual
ER-420
ELECTRONICCASHREGISTER
All specificaitons are subject to change without notice

Precaution Statements
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as
electrical shock.
1-1 Safety Precautions
1. Be sure that all built-in protective devices are
replaced. Restore any missing protective shields.
2. When reinstalling the chassis and its assemblies,
be sure to restore all protective devices, including
nonmetallic control knobs and compartment
covers.
3. Make sure there are no cabinet openings through
which people - particularly children - might insert
fingers and contact dangerous voltages.
Such openings include excessively wide cabinet
ventilation slots and improperly fitted covers and
drawers.
4. Design Alteration Warning:
Never alter or add to the mechanical or electrical
design of the SECR. Unauthorized alterations
might create a safety hazard. Also, any design
changes or additions will void the manufacturer’s
warranty.
5. Components, parts and wiring that appear to have
overheated or that are otherwise damaged should
be replaced with parts that meet the original
specifications. Always determine the cause of
damage or over- heating, and correct any potential
hazards.
6. Observe the original lead dress, especially near the
following areas: sharp edges, and especially the
AC and high voltage supplies. Always inspect for
pinched, out-of-place, or frayed wiring. Do not
change the spacing between components and the
printed circuit board. Check the AC power cord
for damage. Make sure that leads and components
do not touch thermally hot parts.
7. Product Safety Notice:
Some electrical and mechanical parts have special
safety-related characteristics that might not be
obvious from visual inspection. These safety
features and the protection they give might be lost
if the replacement component differs from the
original - even if the replacement is rated for
higher voltage, wattage, etc.
Components that are critical for safety are
indicated in the circuit diagram by shading, ( )
or ( ). Use replacement components that have
the same ratings, especially for flame resistance
and dielectric strength specifications. A
replacement part that does not have the same
safety characteristics as the original might create
shock, fire or other hazards.
CAUTION
There is the danger of explosion if battery is incorrectly
replaced.
Replace only with the same or equivalent type
recommended by the manufacturer.
Dispose used batteries according to the manufacturer’s
instructions.
ATTENTION
ll y a danger d’explosion s’il y a remplacement incorrect
de la batterie.
Remplacer uniquement avec une batterie du même type
ou d’un type équivalent recommandé par le constructeur.
Mettre au rebut les batteries usagées conformément aux
instructions du fabricant.
SAFETY NOTICE: "For pluggable equipment, the socket-outlet shall be installed near
the equipment and shall be easily accessible."

1-2 Servicing Precautions
WARNING: First read the-Safety Precautions-section of this manual. If some unforeseen circumstance creates a
conflict between the servicing and safety precautions, always follow the safety precautions.
WARNING: An electrolytic capacitor installed with the wrong polarity might explode.
1. Servicing precautions are printed on the cabinet.
Follow them.
2. Always unplug the units AC power cord from the
AC power source before attempting to:
(a) Remove or reinstall any component or assembly
(b) Disconnect an electrical plug or connector
(c) Connect a test component in parallel with an
electrolytic capacitor
3. Some components are raised above the printed
circuit board for safety. An insulation tube or tape
is sometimes used. The internal wiring is
sometimes clamped to prevent contact with
thermally hot components. Reinstall all such
elements to their original position.
4. After servicing, always check that the screws,
components and wiring have been correctly
reinstalled. Make sure that the portion around the
serviced part has not been damaged.
5. Check the insulation between the blades of the AC
plug and accessible conductive parts (examples:
metal panels and input terminals).
6. Insulation Checking Procedure: Disconnect the
power cord from the AC source and turn the power
switch ON. Connect an insulation resistance meter
(500V) to the blades of AC plug.
The insulation resistance between each blade of the
AC plug and accessible conductive parts (see
above) should be greater than 1 megohm.
7. Never defeat any of the B+ voltage interlocks.
Do not apply AC power to the unit (or any of its
assemblies) unless all solid-state heat sinks are
correctly installed.
8. Always connect an instrument’s ground lead to the
instrument chassis ground before connecting the
positive lead; always remove the instrument’s
ground lead last.
1-3 Precautions for Electrostatic Sensitive Devices (ESDs)
1. Some semiconductor (solid state) devices are easily
damaged by static electricity. Such components are
called Electrostatic Sensitive Devices (ESDs);
examples include integrated circuits and some field-
effect transistors. The following techniques will
reduce the occurrence of component damage caused
by static electricity.
2. Immediately before handling any semiconductor
components or assemblies, drain the electrostatic
charge from your body by touching a known earth
ground. Alternatively, wear a discharging wrist-
strap device. (Be sure to remove it prior to applying
power - this is an electric shock precaution.)
3. After removing an ESD-equipped assembly, place
it on a conductive surface such as aluminum foil to
prevent accumulation of electrostatic charge.
4. Do not use Freon-propelled chemicals. These can
generate electrical charges that damage ESDs.
5. Use only a grounded-tip soldering iron when
soldering or unsoldering ESDs.
6. Use only an anti-static solder removal device.
Many solder removal devices are not rated as anti-
static; these can accumulate sufficient electrical
charge to damage ESDs.
7. Do not remove a replacement ESD from its
protective package until you are ready to install it.
Most replacement ESDs are packaged with leads
that are electrically shorted together by conductive
foam, aluminum foil or other conductive materials.
8. Immediately before removing the protective
material from the leads of a replacement ESD,
touch the protective material to the chassis or
circuit assembly into which the device will be
installed.
9. Minimize body motions when handling unpackaged
replacement ESDs. Motions such as brushing
clothes together, or lifting a foot from a carpeted
floor can generate enough static electricity to
damage an ESD.

ER420 Series Contents •i
Contents
Getting Started 1
About the ER-420 Series ...........................................................................................................1
Unpacking.................................................................................................................................. 2
Installing the Paper ....................................................................................................................2
Basic Features and Functions ....................................................................................................5
Standard Hardware......................................................................................................5
Optional Hardware ......................................................................................................5
Software Features........................................................................................................5
Front Display...............................................................................................................6
Rear Display................................................................................................................9
Control Lock .............................................................................................................12
Keyboards..................................................................................................................13
Memory Clear..........................................................................................................................14
Memory All Clear .....................................................................................................14
Initial Clear .............................................................................................................................. 15
Operating Instructions 17
Function Key Descriptions ......................................................................................................17
Clerk Sign-On/Sign-Off ..........................................................................................................21
Direct Sign-On ..........................................................................................................21
Coded Sign-On..........................................................................................................21
Receipt On and Off..................................................................................................................22
Item Registrations....................................................................................................................23
Open Keyboard PLU Entry .......................................................................................24
Preset Price Keyboard PLU.......................................................................................24
Keyboard PLU Repeat Entry.....................................................................................25
Keyboard PLU Multiplication...................................................................................26
Keyboard PLU Multiplication with Decimal Point...................................................27
Split Pricing (Keyboard PLU)...................................................................................28
Single Item Keyboard PLU .......................................................................................29
Open Code Entry PLU ..............................................................................................30
Preset Price Code Entry PLU ....................................................................................30
Code Entry PLU Multiplication ................................................................................31
Code Entry PLU Multiplication with Decimal Point ................................................ 32
Split Pricing Code Entry PLU...................................................................................32
Modifier Key ............................................................................................................. 33
Price Level Key.........................................................................................................34
PROMO.....................................................................................................................35
Waste.........................................................................................................................36
Percent Key Operations ...........................................................................................................37
Preset Percent Discount on an Item...........................................................................37
Enter a Percent Discount on an Item .........................................................................38
Percent on Sale Total.................................................................................................38
Coupon on Sale (Vendor Coupon) ............................................................................39
Coupon on Item (Store Coupon) ...............................................................................40
Return Merchandise Registrations...........................................................................................41
Voids and Corrections .............................................................................................................42
Error Correction (Void Last Item).............................................................................42

ii •Contents ER420 Series
Error Correction (Void Last Item).............................................................................42
Void Previous Item....................................................................................................42
Cancel........................................................................................................................43
Void Position Operations ..........................................................................................43
No Sale Operations ..................................................................................................................44
Open Drawer .............................................................................................................44
Non Add Number ......................................................................................................44
Received On Account Operations............................................................................................45
Paid Out Operations.................................................................................................................46
Subtotalling a Sale ...................................................................................................................47
Totalling and Tendering...........................................................................................................48
Totalling a Cash Sale.................................................................................................48
Totalling a CHECK Sale ...........................................................................................48
Tendering a Cash Sale ...............................................................................................49
Tendering a CHECK Sale..........................................................................................49
Totalling a Charge Sale .............................................................................................50
Tendering a Charge Sale............................................................................................51
CHECK Cashing .......................................................................................................52
Split Tender ...............................................................................................................53
Post Tender................................................................................................................54
Currency Conversion.................................................................................................55
Table Management and Clerk Interrupt Operations ................................................................56
Overview ...................................................................................................................56
Soft Check .................................................................................................................57
Hard Check................................................................................................................60
X Mode 62
Introduction..............................................................................................................................62
X Reports .................................................................................................................................63
Running a Report – General Instructions ..................................................................63
Report Table ..............................................................................................................64
Cash Declaration......................................................................................................................65
Service Mode Programming 66
Overview..................................................................................................................................66
Memory Allocation Scan .........................................................................................................67
PC Online Mode ......................................................................................................................67
Memory Allocation..................................................................................................................68
Clear Totals..............................................................................................................................69
Clear Grand Totals...................................................................................................................69
Clear PLU File .........................................................................................................................69
Eprom Information ..................................................................................................................69
Function Key Assignment Programming.................................................................................70
Function Key Codes ..................................................................................................71
RS232C Port 1/RS232C Port 2 Options ..................................................................................72
Program Mode Programming 74
Default Programming...............................................................................................................74
Descriptor Programming Methods...........................................................................................74
Program Overlay Method ..........................................................................................75
Descriptor Code.........................................................................................................76
Tax Programming ....................................................................................................................77
Straight Percentage Tax Rate Programming..............................................................77
PLU Programming...................................................................................................................79
Program 100 - PLU Status Programming..................................................................80
Program 110 - PLU Auto Tare Programming ...........................................................83
Program 150 - PLU Group Assignment ....................................................................84

ER420 Series Contents •iii
Program 200 - PLU Price/HALO Programming .......................................................85
Program 250 - PLU Stock Amount Programming ....................................................86
Program 300 - PLU Description Programming.........................................................87
Program 350 - PLU Link Programming....................................................................88
Program 400 – PLU Delete Programming ................................................................89
Program 450 - PLU MIX & MATCH Programming ................................................90
System Option Programming...................................................................................................91
System Option Table .................................................................................................92
Print Option Programming ......................................................................................................95
Print Option Table.....................................................................................................96
Function Key Programming ..................................................................................................100
Program 70 - Function Key Options .......................................................................101
Program 80 - Function Key Descriptor ...................................................................102
Program 90 - Function Key HALO.........................................................................103
ADD CHECK..........................................................................................................104
CANCEL.................................................................................................................105
CASH ......................................................................................................................106
CHARGE1-8 ...........................................................................................................107
CHECK ...................................................................................................................108
CHECK CASHING.................................................................................................109
CHECK ENDORSEMENT.....................................................................................110
CHECK # ................................................................................................................111
CURRENCY CONVERSION ................................................................................112
DRIVE THRU / EAT IN / TAKE OUT..................................................................113
ERROR CORRECT ................................................................................................114
F/S SUB...................................................................................................................114
F/S TEND................................................................................................................115
GUEST....................................................................................................................116
LEVEL1-2...............................................................................................................116
#/NS.........................................................................................................................117
RETURN.................................................................................................................118
MODIFIER 1-5 .......................................................................................................119
PAYMENT..............................................................................................................120
PBAL.......................................................................................................................120
PROMO...................................................................................................................121
PAID OUT1-3.........................................................................................................122
PRINT CHECK.......................................................................................................123
RECD ON ACCT1-3...............................................................................................124
SCALE ....................................................................................................................125
SERVICE ................................................................................................................126
SUBTOTAL ............................................................................................................ 127
TABLE....................................................................................................................127
TARE ......................................................................................................................128
TAX EXEMPT........................................................................................................129
TIP...........................................................................................................................130
VALIDATE.............................................................................................................131
VOID.......................................................................................................................132
WASTE ................................................................................................................... 133
%1- %5....................................................................................................................134
KBD SHIFT ............................................................................................................136
Clerk Programming ...............................................................................................................137
Program 800 - Secret Code Programming...............................................................138
Program 801 - Clerk Status Programming .............................................................139
Program 810 - Clerk Description Programming......................................................140
Mix & Match Programming ..................................................................................................141
Program 600 - Trip Level Programming.................................................................142
Program 601 - Price Programming..........................................................................142
Program 610 - Mix & Match Description Programming.........................................143
Group Programming ..............................................................................................................144

iv •Contents ER420 Series
Miscellaneous Programming .................................................................................................146
Macro Key Sequence Programming........................................................................146
Logo Description Programming ..............................................................................147
NLU Code Number Programming...........................................................................153
Cash-In-Drawer Limit Programming ......................................................................154
CHECK Change Limit Programming......................................................................155
Date and Time Programming...................................................................................156
Machine Number Programming ..............................................................................157
Program Scans .......................................................................................................................158

ER420 Series Getting Started •1
Getting Started
About the ER-420 Series
•The ER-420 Series features a 48-position keyboard with traditional raised keys.
This keyboard will accommodate up to 12 NLU keys and works best in retail
stores, or shops where it is not necessary to place a large number of preset item
keys on the keyboard.
ER-420 Series is an excellent low cost solution for a wide range of retail environments.
ER-420 Series, with its superb thermal printing system, always provides the fastest in
transaction speeds.

2 •Getting Started ER420 Series
Unpacking
1. Unpack and unwrap the cash register.
2. Located in the packing are the following items:
•1 Rolls of paper and paper spindle,
•2 sets of control keys,
•Operation and Program Manual,
3. Remove the cardboard protectors from the cash drawer.
4. Plug the register into a grounded outlet (three prong), insert a control key and turn
the key to the REG control lock position.
Installing the Paper
1. Remove the printer cover.
2. For proper feeding through the print head, cut or tear a straight even edge on the end
of the paper roll. (Be sure to remove any paper with glue residue.) Place the paper
roll in the paper holder so that the paper will feed from the bottom of the roll.

ER420 Series Getting Started •3
3. Insert the end of the paper into the paper slot.
4. Close the paper lever and press the PAPER FEED key until the paper comes out.

4 •Getting Started ER420 Series
5. Passing the leading edge of the paper through the cutter slot. Tear off the excess
paper. Replace the printer cover.
※If you wish to use the printer to print a sales journal, insert the paper into the
paper take-up spool. Wind the paper two or three turns around the spool shaft and
install the spool in the mount.
※ER-420 Series is possible to feed automatically when you rock the paper levers
and insert paper.

ER420 Series Getting Started •5
Basic Features and Functions
Standard Hardware
•Display
=> LCD model : Adjustable 2 line, 20 character liquid crystal display and
ten position rear displays with a rear pop up display standard.
=> VFD model : Ten position front and rear displays with a rear pop-up display
standard.
•Ten-position rear pop up display standard.
•48 position raised keyboard.
•2 station Thermal printer with drop-and-print mechanism.
•Sturdy Metal Cash Drawer with removable 4 Bill 8 Coin drawer insert.
•7-position control lock.
•Standard customer pole display.
•Communications ports: 2 RS232C.
Optional Hardware
•Kitchen printer. / Bill Printer / Journal Printer
•Bar code scanner.
•PC Link
Software Features
•Up to 2 price levels for each PLU.
•Up to 5 PLU modifier keys.
•9,000 (expandable) Price Look Ups (PLUs) for open or preset item registration.
For direct registrations, up to 12 PLUs are on the keyboard.
•18 character programmable descriptors for PLUs and functions.
•Up to 99 PLU Group totals.
•Up to 99 clerks with separate report totals.

6 •Getting Started ER420 Series
Front Display
VFD MODEL
The ER- 420 comes with a ten position front display. Annotations on the display window
include:
•RPT, where a counter appears when the same item is multiplied or repeated.
•The AMOUNT area shows the amount, i.e. price, subtotal or total.
•RCPT OFF indicates when the receipt is turned off.
•The VOID symbol illuminates during Void operations.
•The SHIFT symbol illuminates during Tax Shift operations
•The CLERK segment remains illuminated as long as a clerk is signed on.
AMOUNTRPT
RCPT
OFF
V
OID SHIFT CLERK
The front display offers supplemental descriptors which appear in the first two display
positions (as shown). These descriptors help the operator by supplying additional information
while operating the register, and may be accompanied by an error tone. Supplemental
descriptors include
Change Due
AMOUNTRPT
RCPT
OFF
CLERK
V
OID SHIFT

ER420 Series Getting Started •7
Negative Entry
RCPT
OFF
V
OID SHIFT CLERK
RPT AMOUNT
Subtotal
AMOUNTRPT
RCPT
OFF
CLERK
V
OID SHIFT
Numbered Error Conditions
AMOUNTRPT
RCPT
OFF
CLERK
V
OID SHIFT

8 •Getting Started ER420 Series
LCD MODEL
The ER-420M comes with a liquid crystal screen, allowing you to view up to 2 lines of
information with up to 20 characters per line. The display is backlit and adjustable to provide
excellent visibility, regardless of lighting conditions.
When the control lock is in the OFF position, the register cannot be operated. When the
control lock in the REG, VOID, X, Z, PGM or SM positions the appropriate message, there
are displayed with the message “CLOSED”. You must sign on a clerk to remove the
“CLOSED” message and begin operation.
REG
VOID
Operator Display Example
Press 10.00 – PLU117 to register of the PLU117
Press 50.00 – PLU117 to tender a sale
Displayed Error Conditions
** WARNING **
SEQUENCE ERR
REG MODE
CLOSED
VOID MODE
CLOSED
PLU117
1 10.00
CASH 50.00
CHANGE 40.00

ER420 Series Getting Started •9
Rear Display
The rear display is a 10 digit florescent display that allows your customer to monitor the
transaction and view the sale total. The rear display can be lifted and turned for easy customer
viewing.
Rear Display Information
Item Count The number of times an item has been repeated is displayed
Amount The amount of the item, subtotal or total, is displayed in the
rightmost portion of the display
Rear Display Message
C Change Due
- Negative entry
Sub Subtotal of the sale
= Total of the sale

10 •Getting Started ER420 Series
Error Code Table
E0 SEQUENCE ERROR
E1 PLU NO DATA
E2 CLERK ERROR
E3 AMOUNT COUNT OVER
E4 LAN TRAN
E5 COMMUNICATION ERROR
E6 TIME AND DATE
E7 LIMIT OVER
E8 INACTIVE
E9 XMODE ONLY
E10 NONADD
E11 ADDCHECK ERROR
E12 CONDIMENT ERROR
E13 REQ. EAT IN
E14 REQ. STOCK
E15 REQ.DRAWER
E16 REQ.GUEST
E17 SCALE
E18 CLERK NOT MATCH
E19 COMPULSORY TARE
E20 REQ.DECLARATION
E21 OFF LINE
E22 REQ.ENDORSEMENT
E23 CONSOL OVER
E24 REQ.SUBTOTAL
E25 PROMO ERROR
E26 CHECK OPEN
E27 REQ. PASSWORD
E28 NO VOID PLU
E29 232C SETUP ERROR
E30 REQ.PRESET VALUE
E31 REQ. OPEN VALUE
E32 REQ. AMOUNT
E33 REQ. PAYMENT

ER420 Series Getting Started •11
E34 INVALID FUNCTION
E35 REQ. TABLE
E36 REQ. PBAL
E37 REQ.CHECK #
E38 ONLY ONE TABLE
E39 REQ. VALID
PER RECEIPT PRINTER PAPER END
PFP SYSTEM ERROR (If this problem occurs, call the service
engineer.)
E42 MEMORY ALLOCATION ERROR
E43 PLU DELETE ERROR
PEJ JOURNAL PRINTER PAPER END
E45 RECEIPT AND JOURNAL PRINTER END

12 •Getting Started ER420 Series
Control Lock
The control lock has 7 positions, accessed with 5 keys. Each ECR is shipped with two full
sets of keys.
V
OID
P
Z
X
REG
OFF
VOID Use to void (correct) items outside of a sale.
OFF The register is inoperable.
REG Use for normal registrations.
XUse to read register reports.
ZUse to read register reports and reset totals to zero.
PUse to program the register.
S The S position is a hidden position reserved for
dealer access.
Before performing any operations in Register Mode a clerk must be signed on. See “Clerk
Sign-On/Sign-Off” for a description of clerk operations.
Control Keys
The ER-420 Series includes two sets of keys that may be used to access the following control
lock positions.
Key Positions Accessible
REG OFF, REG
VOID VOID, OFF, REG, X
Z VOID, OFF, REG, X, Z
P VOID, OFF, REG, X, Z, P
C ALL POSITIONS
Note: Keys may be removed from the control lock in the OFF or REG positions.