Sam4s ER-420M Troubleshooting guide

ER-420M
Operation and
Program Manual
ER-420
ELECTRONICCASHREGISTER
All specifications are subject to change without notice
Manual Version 1.2
Samsung ER-420M operating programming ManualSamsung ER-420M operating programming Manual

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:
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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.

ER420M Contents
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Contents
Getting Started 1
About the ER-420M...................................................................................................................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 ................................................................................................................ 7
Control Lock.............................................................................................................. 10
Keyboards..................................................................................................................11
Memory Clear ..........................................................................................................................12
Memory All Clear...................................................................................................... 12
Initial Clear ..............................................................................................................................13
Operating Instructions 15
Function Key Descriptions.......................................................................................................15
Clerk Sign-On/Sign-Off ...........................................................................................................19
Direct Sign-On........................................................................................................... 19
Coded Sign-On ..........................................................................................................19
Receipt On and Off..................................................................................................................20
Item Registrations ....................................................................................................................21
Open Keyboard PLU Entry .......................................................................................22
Preset Price Keyboard PLU....................................................................................... 22
Keyboard PLU Repeat Entry.....................................................................................23
Keyboard PLU Multiplication ................................................................................... 24
Keyboard PLU Multiplication with Decimal Point ................................................... 25
Split Pricing (Keyboard PLU) ...................................................................................26
Single Item Keyboard PLU .......................................................................................27
Open Code Entry PLU............................................................................................... 28
Preset Price Code Entry PLU ....................................................................................28
Code Entry PLU Multiplication.................................................................................29
Code Entry PLU Multiplication with Decimal Point................................................. 30
Split Pricing Code Entry PLU ...................................................................................30
Modifier Key ............................................................................................................. 31
Price Level Key .........................................................................................................32
PROMO..................................................................................................................... 33
Waste.........................................................................................................................34
Percent Key Operations ...........................................................................................................35
Preset Percent Discount on an Item ...........................................................................35
Enter a Percent Discount on an Item .........................................................................36
Percent on Sale Total................................................................................................. 36
Dollar Discount on Sale............................................................................................. 37
Discount on Item .......................................................................................................38
Return Merchandise Registrations ...........................................................................................39
Voids and Corrections .............................................................................................................40

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Contents ER420M
Error Correction (Void Last Item) .............................................................................40
Void Previous Item....................................................................................................40
Cancel ........................................................................................................................41
Void Position Operations...........................................................................................41
No Sale Operations ..................................................................................................................42
Open Drawer..............................................................................................................42
Non Add Number ......................................................................................................42
Received On Account Operations ............................................................................................43
Paid Out Operations.................................................................................................................44
Subtotalling a Sale ...................................................................................................................45
Totalling and Tendering...........................................................................................................46
Totalling a Cash Sale .................................................................................................46
Totalling a CHECK Sale............................................................................................46
Tendering a Cash Sale ...............................................................................................47
Tendering a CHECK Sale..........................................................................................47
Totalling a Charge Sale..............................................................................................48
Tendering a Charge Sale............................................................................................49
CHECK Cashing........................................................................................................50
Split Tender ...............................................................................................................51
Post Tender................................................................................................................52
Currency Conversion .................................................................................................53
Table Management and Clerk Interrupt Operations.................................................................54
Overview....................................................................................................................54
Soft Check .................................................................................................................55
Hard Check................................................................................................................58
X Mode 60
Introduction..............................................................................................................................60
X Reports .................................................................................................................................61
Running a Report – General Instructions...................................................................61
Report Table ..............................................................................................................62
Cash Declaration......................................................................................................................63
Service Mode Programming 64
Overview..................................................................................................................................64
Memory Allocation Scan .........................................................................................................65
PC Online Mode ......................................................................................................................65
Memory Allocation ..................................................................................................................66
Clear Totals..............................................................................................................................67
Clear Grand Totals...................................................................................................................67
Clear PLU File .........................................................................................................................67
Eprom Information...................................................................................................................67
Function Key Assignment Programming .................................................................................68
Function Key Codes...................................................................................................69
RS232C Port 1/RS232C Port 2 Options ..................................................................................70
Program Mode Programming 72
Default Programming...............................................................................................................72
Descriptor Programming Methods ...........................................................................................72
Program Overlay Method ..........................................................................................73
Descriptor Code.........................................................................................................74
Tax Programming ....................................................................................................................75
Straight Percentage Tax Rate Programming ..............................................................75
PLU Programming ...................................................................................................................77
Program 100 - PLU Status Programming ..................................................................78
Program 110 - PLU Auto Tare Programming............................................................81
Program 150 - PLU Group Assignment.....................................................................82

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Program 200 - PLU Price/HALO Programming........................................................83
Program 250 - PLU Stock Amount Programming..................................................... 84
Program 300 - PLU Description Programming ......................................................... 85
Program 350 - PLU Link Programming .................................................................... 86
Program 400 – PLU Delete Programming................................................................. 87
Program 450 - PLU MIX & MATCH Programming................................................. 88
System Option Programming...................................................................................................89
System Option Table .................................................................................................90
Print Option Programming.......................................................................................................93
Print Option Table ..................................................................................................... 94
Function Key Programming.....................................................................................................98
Program 70 - Function Key Options..........................................................................99
Program 80 - Function Key Descriptor.................................................................... 100
Program 90 - Function Key HALO .........................................................................101
ADD CHECK..........................................................................................................102
CANCEL ................................................................................................................. 103
CASH ......................................................................................................................104
CHARGE1-8 ...........................................................................................................105
CHECK ...................................................................................................................106
CHECK CASHING................................................................................................. 107
CHECK ENDORSEMENT..................................................................................... 108
CHECK # ................................................................................................................109
CURRENCY CONVERSION.................................................................................110
DRIVE THRU / EAT IN / TAKE OUT .................................................................. 111
ERROR CORRECT ................................................................................................112
F/S TEND................................................................................................................ 113
GUEST .................................................................................................................... 114
LEVEL1-2 ...............................................................................................................114
#/NS.........................................................................................................................115
RETURN................................................................................................................. 116
MODIFIER 1-5 ....................................................................................................... 117
PAYMENT..............................................................................................................118
PBAL.......................................................................................................................118
PROMO................................................................................................................... 119
PAID OUT 1-3 ........................................................................................................120
PRINT CHECK....................................................................................................... 121
RECD ON ACCT1-3............................................................................................... 122
SCALE ....................................................................................................................123
SERVICE ................................................................................................................124
SUBTOTAL ............................................................................................................ 125
TARE ......................................................................................................................126
TAX EXEMPT........................................................................................................127
TIP........................................................................................................................... 128
VALIDATE.............................................................................................................129
VOID.......................................................................................................................130
WASTE ...................................................................................................................131
%1- %5.................................................................................................................... 132
KBD SHIFT ............................................................................................................ 134
Clerk Programming................................................................................................................135
Program 800 - Secret Code Programming...............................................................136
Program 801 - Clerk Status Programming.............................................................. 137
Program 810 - Clerk Description Programming ......................................................138
Mix & Match Programming................................................................................................... 139
Program 600 - Trip Level Programming ................................................................. 140
Program 601 - Price Programming .......................................................................... 140
Program 610 - Mix & Match Description Programming .........................................141
Group Programming ..............................................................................................................142
Miscellaneous Programming..................................................................................................144
Macro Key Sequence Programming ........................................................................ 144

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Contents ER420M
Logo Description Programming...............................................................................145
NLU Code Number Programming...........................................................................151
Cash-In-Drawer Limit Programming .......................................................................152
CHECK Change Limit Programming ......................................................................153
Date and Time Programming...................................................................................154
Machine Number Programming...............................................................................155
Program Scans .......................................................................................................................156
Sample Reports 158
Financial.................................................................................................................................158
Time.......................................................................................................................................162
PLU........................................................................................................................................163
Clerk.......................................................................................................................................164
Individual Clerk .....................................................................................................................165
Groups....................................................................................................................................166
Stock ......................................................................................................................................167
Open Check............................................................................................................................168

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