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Gtech Accutherm Service Manual Download Page 43

Service Manual for the Accutherm Ultra Printer

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Downloads occur automatically via the terminal application to which the printer is 
connected. Should the RLT need to update the firmware manually, please contact 
your Field Services Engineering (FSE) Representative or send an email to 

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Summary of Contents for Accutherm

Page 1: ...Service Manual for the Accutherm Ultra Printer 2 ACU 003 01 January 2014...

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Page 3: ...ther countries This document is the property of GTECH S p A Providence RI and Spielo International Canada ULC It contains confidential and trade secret information This document including all informat...

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Page 5: ...isions the last two digits of the number above will increment by 1 for example when revision 01 is revised the last two digits in the number above will become 02 Revision details are tracked in the ta...

Page 6: ...Each chapter also has a revision level since chapters may be edited before new manuals are published If you believe your manual is out of date contact GTECH Learning Technology Services to obtain the...

Page 7: ...rd Printer Features 1 5 Mechanism 1 7 Print Head 1 7 Paper Motion 1 8 Cutter 1 8 Sensors 1 8 Power Supply 1 8 Control Electronics 1 9 Overview 1 9 Processor and Memory 1 9 Print Head Interface 1 10 Mo...

Page 8: ...Download AccuTherm Ultra Firmware Install Procedure 6 2 Chapter 7 Disassembly Warranty Information 7 1 Required Tools 7 2 Disconnect the Power Cable 7 2 Disconnect the USB Communications Cable 7 3 Rem...

Page 9: ...ly from the Printer Mechanism Assembly 7 18 Remove Platen from the Knife Stacker Assembly 7 20 Remove Fixed Blade from the Knife Stacker Assembly 7 21 Chapter 8 Troubleshooting Introduction to Trouble...

Page 10: ...Specification A vii PACKAGING A viii General Packaging Procedures A viii Appendix B Diagrams Appendix C Spare Parts and Tools In Warranty Service C iii Post Warranty Service C iv Ordering Spare Parts...

Page 11: ...ix D Product Safety Approvals Safety Instructions D i Radio Interference D ii FCC D ii Industry Canada D ii European Union D ii Telecom D iii FCC D iii Industry Canada D iv Replaceable Batteries D v W...

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Page 13: ...ervice Manual for the Accutherm Ultra Printer 1 1 1 Introduction The Accutherm Ultra Printer is a stand alone thermal printer designed for use with GTECH Lottery Terminals for printing lottery receipt...

Page 14: ...auto cutter Ticket Stacker with capability 75 tickets User Flash Memory 1M bytes User Graphics Memory 128K bytes User Data Memory Font System Flash Memory 2M bytes for Fonts and System files Manual co...

Page 15: ...tra Printer 1 3 Mechanical Specifications Weight Approximately 4 9 lbs 2 22 kg Interface Type USB Printer Type Fixed 80 mm linear thermal head 6 5 165 1 mm 13 26 336 8 mm 8 81 223 77 mm Height 8 81 22...

Page 16: ...condensing only Shipping Storage Humidity Range 10 90 non condensing only excluding paper Electrical Specification AC Power Requirements The Accutherm Ultra Printer is designed to be AC self powered T...

Page 17: ...Stacked Data Matrix RSS GS1 Print Line Width of 640 dots 8 dots mm centered on 3 25 in 82 5 mm Paper Up to a 7 5 in 190 mm Diameter Paper Roll Long life auto ticket cutter Standard variable length sta...

Page 18: ...1 6 GTECH Technical Training and Support Services Manual configuration mode Self test diagnostics Loadable Enhanced Diagnostics USB interface built into main controller PCB...

Page 19: ...thermistor which is used to monitor the temperature of the head substrate Dot energy is continually adjusted based on head temperature supply voltage dot history and paper sensitivity The print head...

Page 20: ...tion with a total cut cycle time of approximately 350 ms Sensors There are two types of sensors used on the Accutherm Ultra printer One type is mounted directly on the controller board and is activate...

Page 21: ...n the Accutherm Ultra is a Motorola ColdFire MCF5253 running at 140 Mhz with integrated USB controller The processor interfaces through a 16 bit external bus to a 64Mb Synchronous Dynamic Ram SDRAM 32...

Page 22: ...A3988 DMOS motor driver that provides two dual bridge bipolar PWM micro stepping motor drivers These drivers operate from the 24 volt supply and apply up to 1 5A phase of output current The drivers ar...

Page 23: ...LED current of the TOF Paper Low sensor is adjustable by the processor in 8 steps from 8ma to 21ma and is auto calibrated using diagnostics resident in the printer The output of this sensor is presen...

Page 24: ...nterface The communications interface is resident on the main controller PCB The Accutherm Ultra is available with one interface USB 1 8 VDC Derived from 3 3V using an internal regulator resident in t...

Page 25: ...erly install the Accutherm Ultra printer The Accutherm Ultra can be used with a number of GTECH terminals including the GT1100 and GT1200 GTECH hardware products and peripherals require properly groun...

Page 26: ...rvices Installation Instructions The following steps describe the procedure for installing the Accutherm Ultra printer 1 Remove the printer and cables from its packaging Figure 2 1 Remove Accutherm Ul...

Page 27: ...r the Accutherm Ultra Printer 2 3 2 Move the Strain Relief lever Figure 2 2 to the left and then plug the power cord into the power connector located at the rear of the printer Figure 2 2 Plug Power C...

Page 28: ...ter s USB data cable into the Main Controller PCB located on the bottom of the Accutherm Ultra Figure 2 3 Figure 2 3 Plug USB Cable into Printer Main Controller PCB USB connection Note how the USB cab...

Page 29: ...your terminal See Figure 2 4 and Figure 2 5 for GT1200 and GT1100 connections Figure 2 4 GT1200 USB Connection Figure 2 5 GT1100 USB Connections 5 Install a paper roll into the printer see page 2 6 f...

Page 30: ...ter Reference the photos that follow each step for the illustrated procedure 1 Press back on the gray cover latch button and raise the paper cover to the open position 2 Tear off the first layer of th...

Page 31: ...ice Manual for the Accutherm Ultra Printer 2 7 4 Close the paper cover firmly so that it latches securely Paper will feed automatically to align itself and then the printer will automatically cut off...

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Page 33: ...a Printer 3 1 3 Configuration This chapter does not apply to the Service Manual for the Accutherm Ultra Printer as all printers are configured at manufacturing and updates are maintained via the lotte...

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Page 35: ...PLEASE NOTE There are no operating instructions for the Accutherm Ultra Printer other than installation and configuration Please see Chapter 5 Diagnostics and Chapter 8 Troubleshooting for information...

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Page 37: ...1 5 Diagnostics The Accutherm Ultra Printer provides printer self test and diagnostics features This chapter provides information about these tests Printer Self Test on page 5 2 Normal Operation Erro...

Page 38: ...ipt is printed that contains a header and the printer firmware revision and serial number The second self test is available by pressing the Service button as shown in Figure 5 1 on the underside of th...

Page 39: ...lable printer test options include the following Print Test Ticket Prints a sample ticket Print GTECH Ticket Prints a GTECH sample ticket Configuration Enters Configuration mode User Stats Provides in...

Page 40: ...ed Paper Yellow Soft Errors Soft errors may be recovered by the host or by opening and closing the printer cover All of these errors are indicated by a 5 second repeating blink pattern Soft Error Stat...

Page 41: ...illuminate as ORANGE AMBER Hard Error State Indicators Power Green Error Red Paper Yellow EEPROM read fault 2 Blinks On Off EEPROM write fault 3 Blinks On Off Error Vector Taken 4 Blinks On Off Knife...

Page 42: ...Accutherm Ultra Extended Diagnostics are performed using the diagnostics on the terminal to which the printer is connected The printer may also be tested using the general Terminal Qualify Diagnostic...

Page 43: ...via the terminal application to which the printer is connected Should the RLT need to update the firmware manually please contact your Field Services Engineering FSE Representative or send an email to...

Page 44: ...e USB port from the drop down menu 8 Click Get Printer Information to verify that you can communicate with the printer 9 To select firmware version a click the Select file to download button b Open th...

Page 45: ...occurred so the old revisions will be displayed but that s OK You can now power cycle the printer Wait at least 10 seconds before re connecting printer power for printer power supply to completely dis...

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Page 47: ...ter may VOID warranty and is therefore PROHIBITED until advised by Management Caution The Power Supply is the only sub assembly approved to be replaced in the field FST after warranty All other subass...

Page 48: ...d then tighten normally Required Tools The following tools are required to disassemble the Accutherm Ultra printer 1 Phillips screwdriver 5 5mm nut driver or wrench Disconnect the Power Cable To disco...

Page 49: ...munications Cable To disconnect the USB data cable Unplug the USB cable from the Main Controller PCB located on the bottom of the printer Figure 7 2 Figure 7 2 Disconnect USB Cable Note that the USB c...

Page 50: ...Assembly To remove the cover assembly 1 Open the Paper Cover Assembly and remove the Paper Roll if present 2 Turn the printer over and remove the four 4 6 screws holding the Base to the Midframe Figu...

Page 51: ...g screws holding Mid frame to Paper Bucket Figure 7 4 Figure 7 4 Remove Screws Holding Midframe to Paper Bucket 4 Lift and rotate the Mid frame Cover Assembly sideways and then separate it from the Ba...

Page 52: ...g the Top of Form Harness Assembly Anti Jam Sensor Harness Assembly Stacker Motor Harness Assembly and Power Supply Connector from the Main Controller PCB Assembly 6 Unplug the Ground Wire from the Pr...

Page 53: ...the Power Supply from the Main Controller PCB Assembly To do so press on locking clip to release the plug from the PCB Assembly see inset 2 Lift the Power Supply out of the Base Assembly When you rei...

Page 54: ...bly 1 Remove four 4 6 Thread Forming Screws holding the Printer Mechanism Assembly to the Base Assembly 2 Rock the Printer Mechanism Assembly and then slide it forward and out from the Base Assembly S...

Page 55: ...he Power Supply cable is unplugged See Figure 7 7 on page 7 3 Unplug the Thermal Print head Ribbon Cable from the Main Controller PCB See callout 2 in Figure 7 9 on page 7 10 When reassembling the The...

Page 56: ...7 10 GTECH Technical Training and Support Services Figure 7 9 Removing Main Controller PCB Assembly from Printer Mechanism Assembly 1 3 2...

Page 57: ...bly faces you as shown in Figure 7 10 on page 12 3 Push on the Print Head Assembly until the upper set of alignment pins escape from the alignment slots in the Paper Path Assembly 4 Push down on the P...

Page 58: ...7 12 GTECH Technical Training and Support Services Figure 7 10 Remove Print Head Assembly from Printer Mechanism Assembly 1 3 4 Position the Print Head Assembly to face you...

Page 59: ...otate the Knife Arm forward until it clears the Gear Cover 2 Remove the outside E Clip allowing you to pull the arm off the shaft 3 Remove the left and right E Clips from the Rotative Blade 4 Remove t...

Page 60: ...cable from the PCB When reassembling the Thermal Print Head Cable ensure the cable is centered in the mating connector on the PCB 2 Remove the Print Head Assembly as shown in the section Remove the Pr...

Page 61: ...Print Head Ground Figure 7 13 Remove 2 Thread Forming screws and Print Head Ground 5 Unplug connectors 6 Remove two 2 M3 screws holding PCB Shield Knife Motor to frame Optional Replace one 1 M3 screw...

Page 62: ...Arm 9 Remove Rotative Blade Pin 10 Remove three 3 Gears Figure 7 15 Remove E Clip Knife Arm Rotative Blade Pin and Three 3 Gears 11 Remove Two 2 4 Thread Forming Screws 12 Remove Print Head Ground Fig...

Page 63: ...not to damage sensor flags Reassemble by reversing the previous steps taking care that the locating bosses are aligned with the mating holes in the frame Figure 7 17 Remove Paper Path Assembly from F...

Page 64: ...sembly from the Printer Mechanism Assembly REMEMBER TO USE ESD PRECAUTIONS 1 Unhook Left Right Validation Compensation Springs and remove springs Figure 7 18 Unhook Validation Springs and Remove 2 Sli...

Page 65: ...9 Slide Stacker Shaft to Right and Remove then Remove Two Transport Rollers 4 Remove Stacker Guide from Frame being careful not to bend the frame tabs Reassemble reversing the above steps Ensure the C...

Page 66: ...ides 3 Remove 4 thread forming screw typ left right sides 4 Remove Bearing Retainer typ left right sides 5 Slide Platen Stripper and L R bearings forward to remove from side plates Figure 7 20 Remove...

Page 67: ...remove the fixed blade from the Knife Stacker Assembly 1 Remove 6 6 thread forming screws retaining knife stacker assembly to the cover Figure 7 21 Remove 6 Screws 2 Remove knife stacker assembly from...

Page 68: ...4 Remove Stacking Gear Retaining Ring 5 Remove Platen Gear Figure 7 23 Remove Stacking Gear Retaining Ring and Platen Gear 6 Remove one 1 4 Thread Forming Screw 7 Remove the Right Platen Bearing Reta...

Page 69: ...8 Remove one 1 4 Thread Forming Screw 9 Remove the Left Platen Bearing Retainer Figure 7 25 Remove 4 Screw and Left Platen Retainer 10 Remove Stacker Bearing 11 Remove two 2 4 Thread Forming screws F...

Page 70: ...ces 12 Remove Right Side Plate Assembly 13 Remove Platen Stripper and L R Platen Bearings Figure 7 27 Remove Right Side Plate Assy Platen Stripper and L R Platen Bearings 14 Remove Fixed Blade Spring...

Page 71: ...Printer 7 25 15 Remove Latch Arm Hub 16 Remove Retaining Ring Figure 7 29 Remove Latch Arm Hub and Retaining Ring Position remaining assembly in a vertical orientation for remaining disassembly Figure...

Page 72: ...H Technical Training and Support Services 17 Remove Knife Pivot Shaft 18 Remove Latch Arm Pivot 19 Remove Fixed Blade Assembly Figure 7 31 Remove Knife Pivot Shaft Latch Arm Pivot and Fixed Blade Assy...

Page 73: ...sembly Figure 7 32 Check Location of Latch Arm Hub Reverse Steps 1 through 20 for reassembly When installing Platen Striper and Bearings ensure the Striper locating bosses are aligned with the mating...

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Page 75: ...RLT steps that follow ensure that the printer s warranty status has been determined If a printer is still In Warranty you may only perform cleaning procedures in an attempt to clear a fault disassembl...

Page 76: ...o Loading Paper on page 3 6 2 Ensure the use of the recommended thermal receipt paper 3 Swap the printer Vertical column of print is missing Swap the printer Receipt does not come all of the way out 1...

Page 77: ...mains on unless an error is indicated There are two classes of errors soft and hard Soft errors are recoverable without power cycling the printer Hard errors cannot be recovered from without removing...

Page 78: ...e printer off wait 60 seconds then turn it on again 2 Swap the printer Printer Head Over Temperature 1 Ensure that the printer is being operated in the proper room temperature not too hot or too cold...

Page 79: ...4 Check thermal print head cable connections 5 Replace the printer mechanism Refer to Remove the Printer Mechanism Assembly from the Base Assembly on page 7 8 Missing Print Replace the print head Refe...

Page 80: ...is blinking Error Indicators Power Green Error Red Paper Yellow Soft Hard Errors Soft Errors Soft errors may be recovered by the host or by opening and closing the printer cover All of these errors ar...

Page 81: ...Main Controller PCB Assembly Power Problem 1 Check that the terminal has power 2 Check that printer cables are properly connected on both ends 3 Ensure the latch and receipt cover is closed 4 Verify...

Page 82: ...ter Reference the photos that follow each step for the illustrated procedure 1 Press back on the gray cover latch button and raise the paper cover to the open position 2 Tear off the first layer of th...

Page 83: ...rvice Manual for the Accutherm Ultra Printer 8 9 4 Close the paper cover firmly so that it latches securely Paper will feed automatically to align itself and then the printer will automatically cut of...

Page 84: ...Grasp the jammed paper and gently pull to un jam it from the inside of the printer 4 Advance the paper roll so that the jammed portion and a few additional inches are outside of the printer 5 Close th...

Page 85: ...printer This is stressed particularly when performing any cleaning of the print head as ESD discharge directly onto the print head can cause failures Once the unit is opened the paper path is accessi...

Page 86: ...Be careful not to touch it and let it cool down before you clean it Do not damage the print head by touching it with your fingers or any hard object If streaking on the printed ticket is evident the t...

Page 87: ...3 Cleaning the Top of Form Paper Low Sensor Clean the Top of Form Paper Low sensor with a cotton swab moistened with 91 isopropyl alcohol Figure 9 2 Figure 9 2 Clean TOF Sensor and Check Paper Out Ind...

Page 88: ...ean the Jam Detection Sensor with a cotton swab moistened with 91 isopropyl alcohol Figure 9 3 Cleaning the Platen Use a cloth dampened with alcohol to wipe the platen of any debris as needed Figure 9...

Page 89: ...r explains the proper handling of Electrostatic Discharge ESD sensitive modules and devices the proper transport of terminals and other parts how terminals and devices should be packaged for returns t...

Page 90: ...rge as low as 150 volts Usually the damage is such that it goes undetected for some time but eventually creates either an intermittent or hard failure in the field Insulators or non conductors of elec...

Page 91: ...t thresholds shift output levels and drive ability degrade etc Increased failure rates are also typical Normal stresses such as temperature swings power surges or another zap could permanently disable...

Page 92: ...dividual components but such damage is not something that a technician can readily identify MYTH The GTECH terminal is not susceptible to static damage FACT Our terminals can be damaged or destroyed b...

Page 93: ...n at a bench to properly retrieve parts from a stock area is as follows You the technician are seated at a bench connected to electrical ground via a wrist strap The bench surface has a clean grounded...

Page 94: ...tic safe environment The workbenches must have anti static mats which are connected to earth ground and the RLT must observe proper ESD precautions utilizing static wrists straps and proper anti stati...

Page 95: ...GTECH assemblies comply with IEC 61000 4 2 recommendations for severity typically in excess of level three IEC stands for International Electrotechnical Commission The specification is for Electromag...

Page 96: ...sported in slotted conductive totes with dividers spaced for tight capture If boards are very short anti static bubble wrap or anti static foam is used to prevent movement from slotting during handlin...

Page 97: ...herm Ultra Printer A ix The same packing material is used for unpacking and packing the printer Figure A 1 Unpacking and Packing the Printer Description Packset M280 GTECH EPS Figure A 1 Cord Power IE...

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Page 99: ...ce Manual for the Accutherm Ultra Printer B i B Diagrams The following page includes the block diagram for the Accutherm Ultra Printer Please contact FSE Engineering should you need additional informa...

Page 100: ...2Mb x 16 BGA FPGA BGA Print Head Power Supply and Soft Start Address Data Bus Clock Oscillator Cover EEPROM RS232 Driver 24 VDC from internal power brick 3 3V 1 5V Paper Cut Home TOF JAM On board sens...

Page 101: ...d non warranty service Table C 1 Spare Parts and Tools Description Pack Top 73 0830 03 Part 1 in Figure C 1 Pack Bottom 73 0830 02 Part 4 in Figure 10 1 Power Cord IEC 60320 C5 TO C14 R A Part 2 in Fi...

Page 102: ...C ii GTECH Technical Training and Support Services Figure C 1 Unpack Pack the Printer Soft Brush Table C 1 Spare Parts and Tools Description Power Cord Accutherm Ultra Printer...

Page 103: ...t Technologies located in Ithaca New York The printer is under warranty for a period of time determined by the warranty agreement for your site Warranty agreements can be found in Documentum Webtop in...

Page 104: ...SOR ACCTHRM Ultra 12 0921 01 CLUTCH ASSY MOLDED ACCTHRM Ultra 12 0922 01 ASSY STACKER SHAFT STD ACCTHRM Ultra 12 0920 01 PIN DOWEL ACCTHRM Ultra 12 0919 01 SHAFT LATCH ACCTHRM Ultra 12 1035 01 LATCH A...

Page 105: ...SUP 16 1794 01 ASSY PAPER COVER ACCTHRM Ultra 17 0946 01 SPRING COMP PRINT HEAD ACCTHRM Ultra 17 0945 01 SPRING COMP STACKER TENSION ACCTHRM SUP 17 0944 01 SPRING LATCH ARM EXT ACCTHRM Ultra 17 0943 0...

Page 106: ...model You should substitute the XX for the 2 digit suffix on your printer model The parts list included in this section include all available mechanical parts for the Accutherm Ultra printer It is pos...

Page 107: ...ols Service Manual for Accutherm Ultra Printer C vii Printer Assembly Table C 3 Printer Assembly Number Description GTECH Part Number 1 ASSY BASE 16 2054 01E 2 ASSY MIDFRAME 16 2055 01E 3 ASSY PAPER B...

Page 108: ...3 8 THD CUT PHD PHPS 10 1366 01 9 TAB FASTON 187 X 019 MFG 98 03968 10 1369 01 10 SPRING SLACKER LEFT 17 1144 01E 11 SPRING SLACKER RIGHT 17 1145 01E 12 POWER SUPPLY 3 WIRE CEC COMPLIANT 50 0432 01E...

Page 109: ...Manual for Accutherm Ultra Printer C ix Assembly Base 16 2054 01E Table C 5 Assembly Base 16 2054 01E Number Description Mfg Part Number GTECH Part Number 1 ASSY BASE 28 09855 16 2054 01E 2 FOOT RUBB...

Page 110: ...Paper Bucket 16 2056 01E Table C 6 Assembly Paper Bucket 16 2056 01E Number Description Mfg Part Number GTECH Part Number 1 ASSY PAPER BUCKET 28 09872 16 2056 01E 2 ROLLER EPIC 950TRANSPORT 95 04907 1...

Page 111: ...able C 7 Assembly Mid Frame 16 2055 01E Number Description Mfg Part Number GTECH Part Number ASSY MIDFRAME 28 09950 16 2055 01E 1 LENS LED 28 09869 13 1040 01E 2 MIDFRAME PRI NTER 28 09840 Substitute...

Page 112: ...aper Cover Mfg 28 09955 Number Description Mfg Part Number GTECH Part Number 1 ASSY GROUND WIRE M280 ULTRA 28 09177L 30 0133 01E 2 ASSEMBLY KNIFE FRAME ASSY 28 09730 15 3737 01E 3 COVER PAPER 28 09845...

Page 113: ...Spare Parts and Tools Service Manual for Accutherm Ultra Printer C xiii Assembly Lower Mechanism...

Page 114: ...0 GEAR COMBO 48 28 IDLER Part 28 03705 16 1814 01 11 COVER GEAR Part 28 09674 16 2067 01E 12 FRAME ASSY MECHANISM Part 28 09689 15 3747 01E 13 GEAR 24 TOOTH Part 28 03703 16 1815 01 14 GEAR 36 18 TOOT...

Page 115: ...01E 30 SCREW M 3 X 6 MM SEMS PHD PHPS Part 98 02215 10 2153 01E 31 SHAFT TENSIONER Part 28 09691 12 1024 01E 32 SHAFT SLACKER Part 28 09692 12 1025 01E 33 SHIELD PCB Part 28 09833 11 4270 01E 34 SPRI...

Page 116: ...C xvi GTECH Technical Training and Support Services Assembly Knife Slacker 15 3737 01E...

Page 117: ...E 9 BRACKET KNIFE SPRING 28 09748 17 1137 01E 10 BRACKET LATCH ARM 28 09771 16 2085 01E 11 BUTTON PAPER COVER 28 09850 16 2059 01E 12 RING E 188 DIA 98 1390 10 1370 01 13 GEAR 30 TOOTH 28 09698 13 102...

Page 118: ...D PHPS 98 1182 10 2151 01E 31 SCREW M3 X 6MM PHPS PHD 98 0611 10 2165 01E 32 SHAFT LATCH 28 10718 12 1022 01E 33 LATCH ARM ASSY 28 09819 15 3741 01E 34 SPRING LATCH BAR 28 09740 17 1138 01E 35 SPRING...

Page 119: ...xix Assembly Paper Path 15 3746 01E Table C 11 Assembly Paper Path 15 3746 01E Number Description GTECH Part Number 1 FLAG PAPER OUT COVER OPEN Part 28 10197 16 2064 01E 2 GUIDE PAPER BOTTOM Part 28...

Page 120: ...xx GTECH Technical Training and Support Services Tools List 1 Phillips head screwdriver Multimeter Flat head screwdriver Needle nosed pliers Cotton Swabs 91 Isopropyl Alcohol 5 5mm Nut Driver or Wrenc...

Page 121: ...erminal to acclimate to the temperature for 3 to 4 hours before opening the package Verify that the terminal nominal voltage matches the voltage of the local line to which it is being installed This t...

Page 122: ...ersuant 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 ge...

Page 123: ...ot all areas the sum of the REN s should not exceed five 5 0 To be certain of the number of devices that may be connected to the line as determine by the total REN s contact the telephone company to d...

Page 124: ...s certified equipment This certification means that the equipment meets certain telecommunications network protective operational and safety requirements The Department does not guarantee the equipmen...

Page 125: ...to a telephone loop which is used by the device to prevent overloading The termination on a loop may consist of any combination of devices subject only to the requirement that the total of the Load N...

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Page 127: ...IOS Basic Input Output System bps Bits per Second C Celsius CCD Charge Coupled Device CCFT Cold Cathode Fluorescent Tube CCITT CE The International Telegraph and Telephone Consultive Committee Conform...

Page 128: ...skOnChip dots mm dots per millimeter DPB Digital Processing Board dpi Dots per Inch DPST Double Pole Single Throw DRAM Dynamic Random Access Memory DSR Data Set Ready DTE Data Terminal Equipment DTR D...

Page 129: ...py Disk Drive FFC Flat Flex Cable FIFO First in First out FPG Flash Page FST Field Service Technician GRUB Grand Unified Boot Loader GUTS GTECH Universal Tracking System HDD Hard Disk Drive Hz Hertz C...

Page 130: ...r PCB Printed Circuit Board PCI Peripheral Communications Interface PCMCIA PC Memory Card International Association PFD Power Fail Detect generated by power supply PIT Paper in Throat PSTN Public Swit...

Page 131: ...Universal Asynchronous Receiver Transmitter UL Underwriter s Laboratory us microsecond USB Universal Serial Bus V Volt VAC Voltage Alternating Current VCC 5V Supply Voltage VDC Voltage Direct Current...

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