Metrologic Cubit MS6520 Series User manual

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Service Manual
METROLOGIC INSTRUMENTS, INC.
MS6520 Cubit
® Series

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Table of Contents
Section Name: Page #
PRELIMINARY INFORMATION.............................................................................................................................................1-1
1.1 PRODUCT SAFETY..............................................................................................................................................................1-1
1.1.1 Notices........................................................................................................................................................................1-1
1.1.2 European Standard..................................................................................................................................................1-2
INTRODUCTION............................................................................................................................................................................2-1
2.1 INTRODUCTION............................................................................................................................................................2-1
2.2 MANUAL SCOPE.................................................................................................................................................................2-1
2.3 MANUAL SYMBOL KEY.....................................................................................................................................................2-1
2.4 GENERAL PRECAUTIONS...................................................................................................................................................2-2
2.4.1 PRODUCT ESD INFORMATION:.......................................................................................................................2-2
2.4.2 LASER SAFETY INFORMATION:.......................................................................................................................2-2
2.5 MS6520 CUBIT SCANNER HISTORY PROFILE................................................................................................................2-3
THEORY & OPERATION............................................................................................................................................................3-1
3.1 BASIC DATA DECODING SECTIONAL SUMMARYS.........................................................................................................3-1
3.1.1 Photodiode (Detector) Summary:.........................................................................................................................3-1
3.1.2 Pre-Amplifier Sectional Summary:.......................................................................................................................3-1
3.1.3 Signal Processor Section Summary:.....................................................................................................................3-1
3.1.4 Decoder Section Summary:....................................................................................................................................3-1
3.2 PROGRAMMABLE DEPTH OF FIELD OPERATION SPECIFICATIONS..............................................................................3-2
3.2.1 OPTIMAL LOW AND CLOSE DEPTH OF FIELD...........................................................................................3-2
3.2.2 OPTIMAL HIGH AND NORMAL DEPTH OF FIELD.....................................................................................3-3
3.2.3 FAR DEPTH OF FIELD.........................................................................................................................................3-4
BOARD REMOVAL & INSTALLATION ...............................................................................................................................4-1
4.1 OPTICS BENCH REMOVAL &INSTALLATION.................................................................................................................4-1
4.1.1 Optics Bench Removal.............................................................................................................................................4-1
4.1.2 Optics Bench Installation.........................................................................................................................................4-2
4.2DECODE BOARD REMOVAL &INSTALLATION...............................................................................................................4-3
4.2.1 Decode Board Replacement...................................................................................................................................4-3
4.2.2 Decode Board Installation......................................................................................................................................4-4
4.3 SIGNAL PROCESSOR BOARD REMOVAL &INSTALLATION..........................................................................................4-5
4.3.1 Signal Processor Board Removal..........................................................................................................................4-5
4.3.2 Signal Processor Board Installation.....................................................................................................................4-6
4.4 VLD REPLACEMENT PROCEDURE...................................................................................................................................4-7
4.4.1 VLD Removal Instructions:....................................................................................................................................4-7
4.4.2 VLD Installation Instructions:...............................................................................................................................4-7

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PCB SPECIFICATIONS................................................................................................................................................................5-1
5.1 SIGNAL PROCESSOR BOARD.............................................................................................................................................5-1
5.1.1 Signal Processor Board Functions.......................................................................................................................5-1
5.1.2 SIGNAL PROCESSOR BOARD (37823-A) LAYOUT.......................................................................................5-2
5.2 DECODE BOARD.................................................................................................................................................................5-3
5.2.1 DECODE Board Functions....................................................................................................................................5-3
5.3 DECODEBOARD (37576-D) LAYOUT.....................................................................................................................5-4
5.4 LED BOARD .......................................................................................................................................................................5-5
5.4.1 LED Board Functions.............................................................................................................................................5-5
5.4.2 LED/BEEPER BOARD (37587-D) LAYOUT......................................................................................................5-5
TROUBLESHOOTING..................................................................................................................................................................6-1
6.1 AUDIBLE INDICATORS...............................................................................................................................................6-1
6.2 FAILUREMODES...........................................................................................................................................................6-2
6.3 VISUALINDICATORS..................................................................................................................................................6-3
6.4 MS6520SERIES TROUBLESHOOTING GUIDE.................................................................................................................6-4
SERVICING DIAGRAMS, PARTS & PINS............................................................................................................................7-1
7.1 SCANNERPARTS...........................................................................................................................................................7-1
7.2 CUBIT MODEL EXPLODED VIEW.....................................................................................................................................7-2
7.3 SCANNER CONNECTOR/CABLE PINOUT CONNECTIONS...............................................................................................7-3
7.3.1 Cubit Modular Jack Pinout....................................................................................................................................7-3
7.3.2 Cable Connector Configurations..........................................................................................................................7-3
7.4 MS6520ORBITSCANNER SPECIFICATIONS.................................................................................................................7-5
7.4.1 OPERATIONAL DESIGN SPECIFICATIONS...................................................................................................7-5
7.4.2 OVERALL PHYSICAL DIMENSIONS .................................................................................................................7-5
7.4.3 ELECTRICAL CHARACTERISTICS....................................................................................................................7-6
7.4.4 ENVIRONMENTAL DETAILS...............................................................................................................................7-6
7.5 CAUTION AND SERIAL NUMBER LABELS.......................................................................................................................7-7
7.5.1 Labels.........................................................................................................................................................................7-7
8ORDERING REPLACEMENT PARTS, SERVICING INFORMATION .............................................................8-2
8.1 6500REPLACEMENT PARTS AVAILABLE.......................................................................................................................8-2
8.2 LIMITED WARRANTY.........................................................................................................................................................8-3
8.3 METROLOGIC SERVICE LOCATIONS................................................................................................................................8-5
8.4 PATENTS..............................................................................................................................................................................8-6

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Manual Tables
Table Name: Page #
Table 1 -Manual Symbology............................................................................................................................................................2-1
Table 2 -Troubleshooting Chart –Powering up problems.........................................................................................................6-4
Table 3 -Troubleshooting Guide –Scanning & reading problems...........................................................................................6-5
Table 4 -Troubleshooting Chart -rs-232 interface only.............................................................................................................6-6
Table 5 -Keyboard Wedge Pinout Chart.......................................................................................................................................7-3
Table 6 -RS-232/LTPN Pinout Chart.............................................................................................................................................7-3
Table 7 -"Standard" Powerlink Cable...........................................................................................................................................7-3
Table 8 -Powerlink Cable Pinout.................................................................................................................................................7-54
Table 9 -Adapter Cable Pinout....................................................................................................................................................7-54
Table 10 -Operation Specifications................................................................................................................................................7-5
Table 11 -MECHANICAL Demensions..........................................................................................................................................7-5
Table 12 -Electrical Characteristics..............................................................................................................................................7-6
Table 13 -Enviromental Details......................................................................................................................................................7-6

1-1
1PRELIMINARY INFORMATION
1.1 Product Safety
1.1.1 Notices
Notice
This equipment has been tested and found to comply with limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference, in which
case the user will be required to correct the interference at his own expense. Any unauthorized
changes or modifications to this equipment could void the users authority to operate this device.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received, including interference that may cause
undesired operation.
Notice
This Class A digital apparatus complies with Canadian ICES-003.
Remarque
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
Caution
Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous laser light exposure. Under no circumstances should the customer attempt to
service the laser scanner. Never attempt to look at the laser beam, even if the scanner appears to be
nonfunctional. Never open the scanner in an attempt to look into the device. Doing so could result
in hazardous laser light exposure. The use of optical instruments with the laser equipment will
increase eye hazard.
Atención
La modificación de los procedimientos, o la utilización de controles o ajustes distintos de los
especificados aquí, pueden provocar una luz de láser peligrosa. Bajo ninguna circunstancia el
usuario deberá realizar el mantenimiento del láser del escáner. Ni intentar mirar al haz del láser
incluso cuando este no esté operativo. Tampoco deberá abrir el escáner para examinar el aparato. El
hacerlo puede conllevar una exposición peligrosa a la luz de láser. El uso de instrumentos ópticos
con el equipo láser puede incrementar el riesgo para la vista.

1-2
Attention
L'emploi de commandes, réglages ou procédés autres que ceux décrits ici peut entraîner de graves
irradiations. Le client ne doit en aucun cas essayer d'entretenir lui-même le scanner ou le laser. Ne
regardez jamais directement le rayon laser, même si vous croyez que le scanner est inactif. N'ouvrez
jamais le scanner pour regarder dans l'appareil. Ce faisant, vous vous exposez à une rayonnement
laser qú êst hazardous. L'emploi d'appareils optiques avec cet équipement laser augmente le risque
d'endommagement de la vision.
Achtung
Die Verwendung anderer als der hier beschriebenen Steuerungen, Einstellungen oder Verfahren
kann eine gefährliche Laserstrahlung hervorrufen. Der Kunde sollte unter keinen Umständen
versuchen, den Laser-Scanner selbst zu warten. Sehen Sie niemals in den Laserstrahl, selbst wenn
Sie glauben, daß der Scanner nicht aktiv ist. Öffnen Sie niemals den Scanner, um in das Gerät
hineinzusehen. Wenn Sie dies tun, können Sie sich einer gefährlichen Laserstrahlung aussetzen. Der
Einsatz optischer Geräte mit dieser Laserausrüstung erhöht das Risiko einer Sehschädigung.
Attenzione
L’utilizzo di sistemi di controllo, di regolazioni o di procedimenti diversi da quelli descritti nel
presente Manuale può provocare delle esposizioni a raggi laser rischiose. Il cliente non deve
assolutamente tentare di riparare egli stesso lo scanner laser. Non guardate mai il raggio laser, anche
se credete che lo scanner non sia attivo. Non aprite mai lo scanner per guardare dentro
l’apparecchio. Facendolo potete esporVi ad una esposizione laser rischiosa. L’uso di apparecchi
ottici, equipaggiati con raggi laser, aumenta il rischio di danni alla vista.
1.1.2 European Standard
Warning
This is a class A product. In a domestic environment this product may cause radio interference in
which case the user may be required to take adequate measures.
Funkstöreigenschaften nach EN 55022:1998
Warnung!
Dies ist eine Einrichtung der Klasse A. Diese Einrichtung kann im Wohnbereich Funkstörungen
verursachen; in diesem fall kann vom Betrieber verlangt werden, angemessene Maßnahmen
durchführen.
Standard Europeo
Attenzione
Questo e’ un prodotto di classe A. Se usato in vicinanza di residenze private potrebbe causare
interferenze radio che potrebbero richiedere all’utilizzatore opportune misure.
Attention
Ce produit est de classe “A”. Dans un environnement domestique, ce produit peut être la cause
d’interférences radio. Dans ce cas l’utiliseteur peut être amené à predre les mesures adéquates.

2-1
2INTRODUCTION
2.1 INTRODUCTION
Metrologic's Cubit® is a compact, omnidirectional bar code scanner that can be used as a
presentation scanner or as the scanning component in Original Equipment Manufacturer (OEM)
applications. Incorporating the latest in scanning technology Cubit can scan and decode all standard
bar codes in any orientation.
As an OEM product, the IS6520 is both easy to use and install. The IS6520 is equipped with three
threaded mounting holes, serial programming and PowerLink quick-disconnect cables. The modular
design of Cubit allows the unit to be tailored to meet the needs of a specific application.
As a retail scanner, the MS6520’s user-friendly mounting bracket bolts securely to the countertop
or wall for fixed-mount scanning. Cubit’s small size and aggressive scan pattern make it ideal for
convenience, sporting goods, apparel and toy/hobby stores.
Furthermore, Cubit has the option of direct connection to a 5-Volt power source or plug-in the
Metrologic power supply provided with the scanner.
2.2 Manual Scope
This guide provides a way to perform service repairs. It contains an overview of the scanner with
detailed information about troubleshooting, functionality, and scanner performance.
2.3 Manual Symbol Key
TABLE 1-MANUAL SYMBOLOGY
Caution!
Important Additional Information.

2-2
2.4 General Precautions
** ESD PREVENTION STEPS MUST BE USED DURING ANY
MODIFICATIONS AND/OR REPAIRS TO THIS UNIT! **
2.4.1 PRODUCT ESD INFORMATION:
This product contains ESD sensitive components, or ‘Electrostatic Discharge’ sensitive electronic
parts. Electrostatic discharge is defined as the transfer of charge between bodies at different
electrical potentials.
Electrostatic discharge has the ability to modify the electrical characteristics of a semiconductor
device, possibly degrading or even destroying it. Electrostatic discharge also may upset the
normal operation of an electronic system, causing equipment malfunction or failure.
2.4.2 LASER SAFETY INFORMATION:
Use of controls or adjustments or performance of procedures other than those specified
herein may result in hazardous radiation exposure. Under no circumstances should the customer
attempt to service the scanner. Never attempt to look at the laser beam, even if the scanner appears
to be nonfunctional. Doing so could result in hazardous radiation exposure.
The MS6520 unit is rated as a CLASS IIA laser product, as defined by The U.S. Federal Laser
Product Performance Standard (FLPPS): Title 21 of the Code of Federal Regulations; Part 1000;
[Parts 1040.10 and 1040.11].
CLASS I, II, and IIA lasers are defined as:
CLASS I: cannot emit laser radiation at known hazard levels (typically continuous (CW):
0.4microwatts at visible wavelengths). Users of a Class I laser products are generally exempt from
radiation hazard controls during operation and maintenance (but not necessarily during service).
CLASS II: low power visible lasers, which emit above Class I levels but emitting a radiant power
not above 1mW. The concept is that the human aversion reaction to bright light will protect a
person.
CLASS IIA is a special designation that is based upon a 1000 second exposure and applies only to
lasers that are "not intended for viewing" such as a supermarket laser scanner. These laser are
emitting light in the visible wavelengths (0.4 to 0.7 mm) with power not above 1mW.

2-3
2.5 MS6520 Cubit Scanner History Profile
MS6520 Revision ‘A’ / January 2000
•Light pipe removed from signal processor board and made into separate board.
MS6520 Revision ‘B’ / March 2000
•Ultrasonically welded top case.
MS6520 Revision ‘C’ / August 2000
•VLD from Sony (670nm) to Samsung (650nm).
•Plastic polygon replaces the metal and glass polygon.
•Ground wire is changed from the bench to the board in June of 2002
•VLD goes to laser weld on the third week in August of 2002
•Light shield as part of the can in December of 2003
MS6520 Revision ‘D’ / March 2003
•VLD upgraded to a Samsung 60 degree VLD
•L bracket is die cast
MS6520 Revision ‘F’ / April 2003
•VLD upgraded to Sanyo 70 degree VLD.
MS6520 Revision ‘G’ / June 2003
•VLD cable is changed to a flex cable.
•Signal Processor board is changed to accept a flex cable for VLD
•Signal Processor board is changed to accept 2 L brackets instead of standoffs.

3-1
3THEORY & OPERATION
3.1 Basic Data Decoding Sectional Summarys
3.1.1 Photodiode (Detector) Summary:
3.1.1.1 Receives the optical signal reflected off the bar code
3.1.1.2 Converts into electrical signal (current) of about 100 nanoamps
3.1.2 Pre-Amplifier Sectional Summary:
3.1.2.1 Part of the Signal processor board, usually contained in a shielded area of the PCB with the Photodiode.
3.1.2.2 Converts the electrical currentto a voltage signal
3.1.2.3 Voltage signal is amplified by a factor of 1000
3.1.2.4 Ambient light noise is filtered out. Resultant signal is routed to the mother board to primary signal
processing circuitry
3.1.3 Signal Processor Section Summary:
3.1.3.1 Converts analog waveform into a digital signal that can be used by the microprocessor
3.1.4 Decoder Section Summary:
3.1.4.1 Decoding algorithm decodes digital signals into ASCII characters
FIGURE 2.5-1VLD LASER AND BARCODE DATA PATHS