Welch Allyn 5002 Service Manual
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Welch Allyn 5002 Service Manual

Scales with usb connection, mobile stand-on/mobile bariatric/wheelchair/mobile bariatric
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Welch Allyn Masted Scales with USB
Connection
Service Manual
Model 5002
Model 5122
Model 5702
Model 6002
Model 6702/SP/W Mobile Bariatric Scale
Mobile Stand-On Scale
Stand-On Scale
Mobile Bariatric Scale
Wheelchair Scales

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Summary of Contents for Welch Allyn 5002

  • Page 1 Welch Allyn Masted Scales with USB Connection Service Manual Model 5002 Mobile Stand-On Scale Model 5122 Stand-On Scale Model 5702 Mobile Bariatric Scale Model 6002 Wheelchair Scales Model 6702/SP/W Mobile Bariatric Scale...
  • Page 2 This is not a sale of the software or any copy of the software; all right, title, and ownership of the software remain with Welch Allyn or its vendors. For information about any Welch Allyn product, contact your local Welch Allyn representative: http://www.welchallyn.com/en/other/contact-us.html...

  • Page 3: Table Of Contents

    ONTENTS Introduction ..............................5 Intended use ............................. 5 Indications for use ............................. 5 Intended clinical care environments......................5 Symbols ..............................5 Safety ................................8 General warnings and cautions ........................ 8 Electrostatic discharge (ESD) ........................10 Overview ..............................10 Purpose and scope ..........................10 Technical support services ........................
  • Page 4 Mast Disassembly overview ........................29 Base Disassembly overview ........................51 5122 Disassembly............................ 85 Troubleshooting ............................105 Scale Troubleshooting ........................... 105 Symptoms and solutions ........................107 Appendix ..............................110 Shipping Packing Materials ........................110 Full Assembly Exploded Views ......................112 Fastener Reference (NOT TO SCALE) ....................133...

  • Page 5: Introduction

    The Welch Allyn Masted Scales are intended to be used by clinicians for weighing patients up to 660 pounds (300 kg) for model 5122, up to 880 pounds (400 kg) for models 5002 and 6002, and up to 1000 pounds (454 kg) for models 5702, 6702, 6702SP, and 6702W. Indications for use The Welch Allyn Masted Scales are used by clinicians to weigh patients.

  • Page 8: Safety

    Caution statements can appear on the Welch Allyn Masted Scales, the packaging, the shipping container, or in this service manual. The Welch Allyn Masted Scales are safe for patients and clinicians when used in accordance with the instructions and caution statements presented in this service manual.

  • Page 10: Electrostatic Discharge (Esd)

    Overview Purpose and scope This service manual is a reference for periodic preventive maintenance and corrective service procedures for the Welch Allyn Masted Scales. It is intended for use only by trained and qualified service personnel.

  • Page 11: Technical Support Services

    Welch Allyn service center. Technical support services If you have a problem with the device that you cannot resolve, call the Welch Allyn Technical Support Center nearest you for assistance. A representative will assist you in troubleshooting the problem and will make every effort to solve the problem over the phone, potentially avoiding an unnecessary return.

  • Page 12: Non-Warranty Service

    To ensure safe receipt of your device by the service center and to expedite processing and return of the device to you, thoroughly clean all residue from the device before you ship it to Welch Allyn. For cleaning requirements, see the Cleaning instruction in the Directions for Use.

  • Page 13: Recommended Service Intervals

    4. Write the Welch Allyn RMA number with the Welch Allyn address on the outside of the shipping carton. Recommended service intervals To confirm that the device is functioning within the design specifications, perform periodic service as indicated below. Customers can perform the basic functional verification and calibration procedures referenced below by following the instructions in this manual.

  • Page 14: Battery Replacement

    Battery replacement Change the printer paper Firmware Upgrade While rarely performed, Welch Allyn may release a new version of firmware to support your device. Updating your device firmware ensures you have access to the latest features, fixes, and security updates.

  • Page 15: Firmware Upgrade Process

    TYPE A TO B CABLE. Firmware Upgrade Process 1. Obtain the required firmware file (exe file) from Welch Allyn. 2. Record the serial number of the Scale. 3. With the Scale powered OFF, connect the scale to the laptop/PC with a USB Type A to B cable. Check that the Scale is being detected by the laptop/PC in Device Manager as “USB Serial Device”...
  • Page 16 7. Click “Next”. The following dialog box will appear. 8. Go to BOOT MODE by pressing “ZERO”, “LB/KG”, and “POWER” button simultaneously. Once the Scale powers up and displays “88.88.88”, click “OK” within 2 seconds. (IMPORTANT. If the 2 seconds lapsed, the scale needs to be powered off and the above steps need to be repeated.) 9.

  • Page 17: Firmware Verification

    11. Power off the scale and unplug the USB cable. 12. Power on the scale and "Err db" is displayed. This means the database needs resetting. To reset the database, follow the below steps. a.) Press Zero 5 times b.) “db rSt” will be displayed. c.) Press “LB/KG”...

  • Page 18: Scale Setup

    4. Press the “LB/KG” button until “SOFt” is displayed. Press “LB/KG” one more time; the firmware version will be shown (U X.X.X). (See below reference.) 5. Record the firmware version in section 4, Device Record. Scale setup You can customize the scale to best suit your needs using the Custom Modes. The custom modes on the scale are Setup, Service, Factory, Calibration.
  • Page 19 UI Display Light ON KILOGRAMS This option displays the weight in kilograms (0.0). Default is On This option displays the weight in pounds and kilograms. Default is On KILOGRAMS and POUNDS POUNDS This option displays the weight in pounds (0.0). Default is OFF...

  • Page 20: Service Mode

    Power off the scale to exit Set-up Mode Service Mode Device will enter service mode by entering PIN 4351. The scale will cycle through these parameters by pressing LB/KG key. n ¯ vv (Mvv) displays the current mV/V reading on the scale. A-d displays the current weight.

  • Page 21: Factory Mode

    rEcntS displays the number of times the reweigh key has been pressed. rECLLS displays the number of times the scale has recalled the prior weight. bn ¯ iS (BMIs) displays the number of times of the Height/BMI key has been pressed. OFFS displays the number of times the scale has manually been powered off.
  • Page 22 0.1 pounds / 0.1 kilograms 0.2 pounds / 0.1 kilograms 0.5 pounds / 0.2 kilograms 1 pound / 0.5 kilograms UnitS allows the user to configure the units the scale will be able to use in typical display mode. Locking this to a specific unit will also restrict what units can be printed. Note: If all units are set to Off, the scale defaults to KILOS.
  • Page 23 5002/5122/5702/6002/6702/6702SP/6702W -XX-* -XP-* -KX-* -KP-* SOFt U x.x.x dAtE xx.xx.xx FiltEr 5002 Scale Setting: 5002 5122 Scale Setting: 5122 5702 Scale Setting: 5702 6002 Scale Setting: 6002 SCALE 6702, 6702SP, 6702W Scale Setting: 6702 AdC.CFG AutOFF AC Con 0.1, 0.1 rES (lb kg) FCt.UNt...

  • Page 24: Calibration Of Scale

    Your scale has been carefully calibrated at the factory. Only use calibrated, certified scale test weights for this purpose. Calibration weights may be purchased from WELCH ALLYN or a local scale dealer. TEST CALIBRATION WEIGHTS ARE AVAILABLE FROM WELCH ALLYN. THREE (3) 25 KILOGRAM TEST WEIGHTS ARE RECOMMENDED. ORDER PART NO. 20021W. (25 KG TEST WEIGHTS) Large changes in calibration often indicate a damaged load cell or faulty readout component.

  • Page 25: Usb Details

    LB/KG key to exit back to the Calibration options. Retry the calibration. If an error occurs, press If the error continues see the disassembly and troubleshooting section to identify. USB Details For detailed help and information regarding the data output capabilities, contact Welch Allyn.

  • Page 26: Disassembly And Repair

    Disassembly and repair These procedures provide instructions for device disassembly and board removal, as well as component replacement and reassembly. Each part’s disassembly instructions might include one or both of the following: Reassembly notes: This subsection contains information specific to reassembly. At •...

  • Page 27: Required Tools

    1/8" Allen wrench 5/64" Allen wrench 5/32" Allen socket Torque socket wrench 7/16" Socket or open-end wrench 5/64" Allen wrench 5002, 5702, 6002 Base 3/8" Socket or open-end wrench 1/8" Allen socket 5/16" Socket 1/2" Socket and open-end wrench Torque socket wrench 5/32"...

  • Page 28: Connector Types

    Connector types Disassembly and repair procedures require that you disconnect and reconnect the following connector types inside the device: o Locking (squeeze-release): Locking connectors use a latching mechanism to prevent accidental disconnection during assembly and use. The latch is located on one end of a tab so it may flex and lock into place when coupled with its matching connector.

  • Page 29: Mast Disassembly Overview

    Mast Disassembly overview NOTE: The mast and base disassembly process is for the 5002, 5702, and 6002, and 6702 models. For the 5122 Model see page Handrail and Mast Removal 5002 5702 6002 6702/6702W/6702SP...
  • Page 30 1. Remove handrail screws (6) and handrail 2. Remove mast bolts and washers (2) and mast...
  • Page 31 Mast Disassembly 1. Remove Readout Panel mounting screws (2) and Readout Panel. Disconnect the wire harnesses and unlock the latching wire clips to completely remove. 2. Readout Panel Disassembly a. Remove display board mounting screws (5) and display board 3. Remove handle bolt (2), lock washer (2), wide washer (2), pin aligner (2), and handle...
  • Page 32 4. Remove USB output module mounting screws (2) 5. Remove USB output module assembly. Disconnect the wire harness to completely remove. a. USB Assembly disassembly i. Remove the USB PCBA board mounting screws and then carefully remove the PCBA board from the bracket by using the snap fit.
  • Page 33 6. Remove Printer Door mounting screws (2) and Printer door assembly. Disconnect wire harness and unlock the latching wire clips to completely remove. a. Printer door disassembly i. Gently pull the head of the mounting clips to slide them off the printer to release it from the door.
  • Page 34 iii. Remove printer from the door. 7. Remove battery door screws (2) and battery door. 8. Remove batteries.
  • Page 35 9. Remove Battery Holder mounting screws (4). 10. Unlock the latch wire clips and disconnect them; then, carefully remove the battery holder assembly lower end first. Some rotating will be required to fit the assembly out of the access window. DO NOT PULL ON WIRES. ASSEMBLY SHOULD ONLY BE REMOVED 3” TO ACCESS THE WIRE HARNESS TO REMOVE.
  • Page 36 11. Battery Holder disassembly a. Remove the grounding wire mounting screw. b. Remove the battery holder mounting screws (6) and battery holder. 12. Remove the power jack mounting screws (2).
  • Page 37 13. Remove power jack module and disconnect wire harness to completely remove. 14. Lay the mast down and unlock the wire clips to remove Wire Harness mounting screws (2) and Wire Harness from the bottom of the mast.
  • Page 38 Use this table to determine how much torque to apply to screws by type and location when reassembling the device. Mast Bolts Welch Allyn Part Number Welch Allyn Part Number Description Torque spec (in-lb) 130234 BOLT 3/8-16X3 3/4 HEX HEAD 235.2 ±...
  • Page 39 5002 Top Level 5002 Repair Parts Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number SEE 5002 BASE EXPLODED REPAIR PARTS Table SEE MAST EXPLODED REPAIR PARTS Table 2 132074 WASHER 3/8 IDXI ODSS 130234 BOLT 3/8-16X3 3/4HEX HEAD...
  • Page 40 5702 Top Level 5702 Repair Parts Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number SEE 5702 EXPLODED REPAIR PARTS Table 9 SEE MAST BODY ASSY EXPLODED VIEW Table 2 132074 WASHER 3/8 IDXI ODSS 130234 BOLT 3/8-16X3 3/4HEX HEAD...
  • Page 41 6002 Top Level 6002 Repair Parts Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number SEE 6002 EXPLODED REPAIR PARTS Table 9 SEE MAST BODY ASSY EXPLODED VIEW Table 2 132074 WASHER 3/8 IDXI ODSS 130234 BOLT 3/8-16X3 3/4HEX HEAD...
  • Page 42 6702 Top Level 6702 Repair Parts Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number SEE BASE DISASSEMBLY FOR VARIATIONS AND PARTS Table 15 630179 PLATFORM DECK ASSY 6702 30378 10-24 X 1/2 FH SOC SCR SEE MAST BODY ASSY EXPLODED VIEW Table 2 132074 WASHER, 3/8"...
  • Page 43 6702W Top Level 6702W Repair Parts Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number SEE BASE DISASSEMBLY FOR VARIATIONS AND PARTS Table 16 630202 PLATFORM DECK ASSY 6702 30378 10-24 X 1/2 FH SOC SCR SEE MAST BODY ASSY EXPLODED VIEW Table 2 132074 WASHER, 3/8"...
  • Page 44 6702SP Top Level 6702SP Repair Parts Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number SEE BASE DISASSEMBLY FOR VARIATIONS AND PARTS Table 17 630178 PLATFORM ASSEMBLY 30”X35” 30378 10-24 X 1/2 FH SOC SCR SEE MAST BODY ASSY EXPLODED VIEW Table 2 132074 WASHER, 3/8"...
  • Page 45 5002, 5702, 6002, 6702, 6702W, 6702SP MAST Exploded Repair Parts view diagram Mast Repair Parts Table 1 Mast Repair Parts Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number SEE MAST BODY ASSY EXPLODED VIEW Table 2 412432 HARNESS POWER JACK DC 2.5MM SCALE-T...
  • Page 46 726601 OVERLAY, GRAPHIC, MAST, WPRINT, SCALE-T 726602 OVERLAY GRAPHIC MAST WOPRINT SCALE-T Accessory Repair Parts Welch Allyn Qty Welch Allyn Part Number Description Part Number 749201 "D" CELL BATTERY 726551 POWER SUPPLY, EXT, 12VDC 726975 LABEL, SCALE-T, 6 D BATTERY DOOR...
  • Page 47 HARNESS INTERIOR MAST COMMON SCALE-T 106100-4 SCREW 4-40 .380 PAN PHILLIPS Readout Assembly Table 3 Readout Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726611 COVER, MAST, READOUT PANEL, SCALE-T 412270 PCBA DISPLAY W/TACT-SWITCH SCALE-T 48611 SCW, 6-32 X 1/4”...
  • Page 48 SCREW 3/24X1/4 PHILLIPS PHP PLASTITE 412430 HARNESS, USB INTERFACE, SCALE-T Printer Door Assembly Table 5 Printer Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726609 PLATE, PRINTER HOLDER, MAST, SCALE-T 726610 PRINTER MECH MARTEL SCALE-T_MPP5810-20K-414...
  • Page 49 Battery Bracket Assembly Table 6 Battery Bracket Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726616 BRACKET, MAST, BATT HLD, SCALE-T 412431 HARNESS BATT HOLDER W/GRD SCALE-T 24014 SCW 6-32 X 1/4 PHIL PAN STEEL NICKEL 48611 SCW, 6-32 x 1/4”...
  • Page 50 Table 7 Mast Wiring Diagram Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 412430 HARNESS, USB INTERFACE, SCALE-T 715822 CABLE TIE HOLDER WITH ADHESIVE 113P464 CABLE TIE, 6 INCH 726603 HARNESS INTERIOR MAST COMMON SCALE-T 727162...

  • Page 51: Base Disassembly Overview

    Base Disassembly overview 5002 Base 6702 Base 5702 Base 6702W Base 6002 Base 6702SP Base...
  • Page 52 5702/5002/6002 Base Disassembly 1. Remove GPR Plate cover or Platform Mounting screws (4) and Platform. 5702 Platform 5002 Cover 6002 Platform 2. Remove GPR top plate mounting screws (4) and GPR top plate.
  • Page 53 Remove blue spacers (4). 4. Carefully flip over the base to remove wire cover screws (2) and wire cover. 5. Carefully flip the base over to unplug the base A/D cable from the measurement board and release the cable clips securing it to the pan. a.
  • Page 54 6. Remove wiring harness and screws (2) by cutting the cable tie while feeding the wire through the back and pulling the wire out the top to avoid damaging the harness. 7. Unplug the loadcell cabling from the main board and release the cables from the tape or cable management clips.
  • Page 55 8. Remove GPR assembly mounting screws (4) and washers (4). 9. Remove GPR assembly. 10. Remove PCBA screws (4) and board. CAUTION: Ensure ESD protection.
  • Page 56 11. Remove load mounts (4). 12. Remove load cell nuts (8) and load cells (4). 13. Remove overload protection plates (6).
  • Page 57 14. Carefully flip over the base to remove wheel nuts (2), wheel bolts (2), wheels (2) and wheel bushings (2). 15. Remove feet screws (6) and nylon feet (6). 5702, 6002, 6702 Model Feet 5002 Model Feet...
  • Page 58 6702/6702W/6702SP Base Disassembly 1. Remove the platform mounting screws (10) and platform. 2. Remove grounding wire mounting screws (2). 3. Remove the top plate mounting screws (4) and top plate.
  • Page 59 4. Turn overload brackets to the side and remove Load Mounts (4) and Washers (4). 5. Disconnect the loadcells and wiring harness from the PCBA board. 6. Remove the PCBA mounting screws (4) and PCBA board.
  • Page 60 7. Remove wire clip mounting screws (6) and nuts (4) and wire clips (6). 8. Carefully remove the Load Cell Assembly mounting bolts (4) and washers (4) while holding the load cell assembly and spacer in place on one side; then, remove the Load Cell Assembly (1), and Spacer (1). Repeat for the other side.
  • Page 61 10. Remove Wire Harness mounting screws (2) and carefully put the wire harness up while feeding it through the lower hole. 11. Remove the Wheel mounting bolt (2) and nut (2), remove the Wheel (2) and the Wheel bushing (2) one side at a time.
  • Page 62 For 6702W only: 13. Remove extender feet lock nut (2) and loosen set screw (2) to remove the Extender feet (2) from the frame. For 6702SP only: 14. Remove the rear plastic feet mounting screws (2) and plastic feet (2).
  • Page 63 15. Loosen the support angle set screw (4). 16. Remove the outrigger outer feet mounting bolts (4) and nuts (4), plastic feet (4), thin washers (8), and thick washers (4) one foot at a time.
  • Page 64 17. Remove the support angle mounting bolt (1) and nut (1) and support angle (1) of each foot, one at a time. 18. Remove the outrigger inner feet lock nuts from the channel (4), mounting bolts (4), plastic feet (4), thin washers (4), thick washers (4) and J-bracket (4) one foot at a time.
  • Page 65 Torque Specification Values Use this table to determine how much torque to apply to screws by type and location when reassembling the device. 5002 Torque Values (in-lb) Welch Allyn Part Number Welch Allyn Part Number Description Torque spec (in-lb) 130060 SCREW 10-32 X 1/2"...
  • Page 66 Base Repair Parts 5002 Table 8 5002 Base Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 412662 BASE WELDMENT 5002 SCALE-T 139041 WASHER FLAT NYLON 1 1/4” X 1/4” 130060 SCREW 10-32X1/2 FHS FOR DELRON 50502 WHEEL 4”...
  • Page 67 CABLE TIE HOLDER WITH ADHESIVE 113P463 CABLE TIE MOUNT 5702 & 6002 Table 9 5702 & 6002 Base Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726497 BASE WELDMENT 6002/6502 SCALE-T 139040 FOOT PLASTIC 1 3/4” X 3/8”...
  • Page 68 039325W CABLE GUARD 130212 10-32 X 1/4 SCREW – BHMS SOC 50542 CLIP, METAL CABLE 3/16” SEE GPR ASSY EXPLODED VIEW Table 10 33004 WSH 1/4 STEEL SPLIT LOCK 130237 SCW, 10-32 X 3/8" PHIL RND MS, SS 50509 1/8 THICK EAR SPACER 3/4X3/4 030352W PLATE 6002 GPR TOP 40408...
  • Page 69 GPR Assembly Table 10 GPR Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726613 BOTTOM PAN 5002 726614 PLATE, OVERLOAD PROTECT, 500LB-DWB 726615 LOAD CELL 500 LB DWB-SCALE-T 106137-4 NUT, 10-32 EXTLOCK 133110 MOUNT METAL LOAD...
  • Page 70 GPR Wiring Harness Table 11 Wiring Harness Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 412469 HARNESS INTERIOR BASE LONG SCALE-T 726615 LOAD CELL 500 LB DWB SCALE-T 727162 ADHESIVE BACKED LATCHING WIRE CLIP 715822 CABLE TIE HOLDER WITH ADHESIVE...
  • Page 71 6702/6702W/6702SP Platform Assembly and Mounting 6702 Table 12 6702 Platform Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 039311W PLATFORM, 6702 28" X 31" 039312W PLATFORM RAMP 29" 6702 029073W PLATFORM HINGE 29" 6702 130212...
  • Page 72 6702W Table 8 6702W Platform Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 039343W PLATFORM, EXT LENGTH 6702 039344W RAMP, EXT LENGTH 6702 029073W PLATFORM HINGE 29" 6702 130212 10-32 X 1/4 SCREW - BHMS SOC 531012 SHUR-STEP MAT·12"...
  • Page 73 6702SP Table 94 6702W Platform Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 039319W DECK, OVERSIZE 30" X 35" 039312W PLATFORM RAMP 29" 6702 029073W PLATFORM HINGE 29" 6702 130212 10-32 X 1/4 SCREW - BHMS SOC 531012 SHUR-STEP MAT·12"...
  • Page 74 6702 Base Assembly Table 15 6702 Base Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726498 WELDMENT, BASE, 6702, SCALE-T CS-206 WASHER, FENDER .28" X 1.5" 726340 WSHR,0.281"ID,1.5" OD,0.11"- 0.14THK 139040 FOOT PLASTIC I 3/4" X 3/8"...
  • Page 75 412601 HARNESS INTERIOR BASE SHORT SCALE-T 106100-4 SCREW 4-40 .380 PAN PHILLIPS 039325W CABLE GUARD 130212 10-32 X 1/4 SCREW - BHMS SOC 727292 LOAD CELL SPACER 4HOLE SCALE-T SEE LOADCELL ASSEMBLY EXPLODED VIEW TABLE 18 727578 1/4 SPLIT RING LOCKWASHER, SS 727547 SCREW, 1/4-20 X 1.75 HHCS SS 50542...
  • Page 76 6702W Base Assembly Table 16 6702W Base Assembly Unique Welch Allyn Welch Allyn Part Number Description Identifier Part Number 726498 WELDMENT, BASE, 6702, SCALE – T CS-206 WASHER, FENDER 0.28” X 1.5” 726340 WSHR 0.281" ID, 1.5" OD, 0.11"- 0.14 THK 139040 FOOT PLASTIC I 3/4"...
  • Page 77 106100-4 SCREW, 4-40 x .380 PHP 039325W CABLE GUARD 130212 10-32 X 1/4 SCREW - BHMS SOC 727292 LOAD CELL SPACER 4HOLE SCALE-T SEE LOADCELL ASSEMBLY EXPLODED VIEW TABLE 18 727578 1/4 SPLIT RING LOCKWASHER, SS 727547 SCREW, 1/4-20 X 1.75 HHCS SS 50542 CLIP, METAL CABLE 3/16"...
  • Page 78 6702SP Base Assembly Table 17 6702SP Base Assembly Unique Welch Allyn Welch Allyn Part Number Description Identifier Part Number 726498 WELDMENT, BASE, 6702, SCALE-T CS-206 WASHER, FENDER .28" X 1.5" 726340 WSHR,0.281"ID,1.5" OD,0.11"- 0.14THK 139040 FOOT PLASTIC I 3/4" X 3/8"...
  • Page 79 726773 SCW 5/16 – 18 1/2ROUDED CAP, VIBRATITE 50502 WHEEL 4” 50314 BUSHING, WHEEL 5/16” X 1” 50614 SCW 5-16-24X1 3/4HEX CS GRD 8 NICK 52523 NUT 5/16-24 HEX NKL 412601 HARNESS INTERIOR BASE SHORT SCALE – T 106100-4 SCREW 4 – 40 X .380 PAN PHILLIPS 039325W CABLE GUARD 130212...
  • Page 80 6702/6702W/6702SP Loadcell Assembly Table 18 6702/6702W/6702SP Loadcell Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 727014 LOAD CELL DEBB-1000LB 3S SCALE-T 726348 WASHER,1/4"IDX1"ODX0.060"-0.090"TH 133086 LOADMOUNT 3/8" X 1" WITH 3/8" 900001W BRACKET, ISOLATION LIMITER 726341...
  • Page 81 6702 Wiring Harness Table 19 6702 Wiring Harness Unique Welch Allyn Welch Allyn Part Number Description Identifier Part Number 727014 LOAD CELL, DEBBW-1000LB, 3S, SCALE-T 412601 HARNESS, INTERIOR, BASE, SHORT, SCALE-T 727162 ADHESIVE BACKED, LATCHING, WIRE CLIP 715822 CABLE TIE HOLDER WITH ADHESIVE...
  • Page 82 6702W Wiring Harness Table 20 6702W Wiring Harness Unique Welch Allyn Welch Allyn Part Number Description Identifier Part Number 727014 LOAD CELL, DEBBW-1000LB, 3S, SCALE-T 412601 HARNESS, INTERIOR, BASE, SHORT, SCALE-T 727162 ADHESIVE BACKED, LATCHING, WIRE CLIP 715822 CABLE TIE HOLDER WITH ADHESIVE...
  • Page 83 6702SP Wiring Harness Table 21 6702W Wiring Harness Unique Welch Allyn Welch Allyn Part Number Description Identifier Part Number 727014 LOAD CELL, DEBBW-1000LB, 3S, SCALE-T 412601 HARNESS, INTERIOR, BASE, SHORT, SCALE-T 727162 ADHESIVE BACKED, LATCHING, WIRE CLIP 715822 CABLE TIE HOLDER WITH ADHESIVE...
  • Page 84 6702SP Outrigger Assembly Table 22 6702SP Outrigger Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726253 BRACKET, 6702-SP STABILIZER SCALE-T 700000W L-ANGLE SUPPORT ASSY, 6702SP 139040 FOOT PLASTIC I 3/4" X 3/8" 60624 SCREW 1/4-20 X 1" FHSS...

  • Page 85: 5122 Disassembly

    5122 Disassembly Mast Removal and Disassembly 1. Remove the slider-mast cover mounting screws (2) and cover.
  • Page 86 2. Remove readout assembly mounting screws (2) and readout assembly. Disconnect wiring and unlock wire clips to completely remove. Readout Panel Disassembly i. Remove display board mounting screws (5) and display board. 3. Remove mast back panel mounting screws (8) and mast back panel.
  • Page 87 4. Disconnect wiring harnesses and unlock wire clips. a. Note: the middle connection goes into the base and must be completely free to remove the mast. 5. Remove mast mounting screws (4) and mast assembly.
  • Page 88 6. Remove USB assembly mounting screws (2) and USB assembly. Disconnect wiring harness to completely remove. a. USB Assembly disassembly i. Remove the USB PCBA board mounting screws and then carefully remove the PCBA board from the bracket. 7. Remove battery door screws (2) and battery door.
  • Page 89 8. Remove batteries (6). 9. Remove battery holder assembly mounting screws (4) and battery holder assembly.
  • Page 90 a. Battery Holder assembly disassembly i. Remove the grounding wire mounting screw. ii. Remove the battery holder mounting screws (6) and battery holder.
  • Page 91 10. Remove power jack mounting screws (2) and power jack.
  • Page 92 Base and Load Cell Assembly Disassembly 1. Tip the base over to remove the top plate mounting nuts (4). 2. Remove base top plate.
  • Page 93 3. Remove base ground mounting nuts (2) from the base and the top plate and the ground leads. a. CAUTION: Remove the ground wire before separating the top plate.
  • Page 94 4. Remove the load mounts (4) and load mount washers (4) from the top plate. 5. Disconnect the wiring from the PCBA board.
  • Page 95 6. Remove PCBA mounting screws (4) and PCBA board. CAUTION: Ensure ESD protection. 7. Tip the base up to remove the load cell assembly mounting nuts (4), screws (4), and load cell assemblies (2). Be sure to hold the load cell assemblies in place while removing the screws to avoid damage. 8.
  • Page 96 Use this table to determine how much torque to apply to screws by type and location when reassembling the device. Scale Assembly Welch Allyn Part Number Welch Allyn Part Number Description Torque spec (in-lb) 10-32X1/4 SCREW - BHMS SOC 15.9 ± 3.9 130212 SCW, 1/4-20 X 1/2"...
  • Page 97 5122 Repair Parts Table 23 5122 Top Level Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number SEE SLIDER BASE EXPLODED VIEW Table 29 SEE 5122 MAST EXPLODED VIEW Table 25 48112 SCW, 1/4-20 X 1/2" BHCS, SS, PASSIVATED...
  • Page 98 Accessory Repair Parts Welch Allyn Part Qty Welch Allyn Part Number Description Number 749201 "D" CELL BATTERY 726583 LABEL POWER SCALE-T 726975 LABEL SCALE-T BATTERY DOOR 21209 LABEL, S-T 6" X 7/8" BLACK ON 726638 LBL ST CAPACITY LABEL 300KG...
  • Page 99 5122 Mast Assembly Table 25 5122 Mast Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726894 SLIDER, MAST, SCALE-T 412432 HARNESS POWER JACK DC 2.5MM SCALE-T 726494 SCREW 1/32X3/8 THREAD FORM SEE BATTERY BRACKET EXPLODED VIEW...
  • Page 100 USB Assembly Table 26 USB Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726555 BRACKET, USB PCBA, SCALE-T 412273 PCBA USB SCALE-T 727161 SCREW 3/24X1/4 PHILLIPS PHP PLASTITE 412430 HARNESS, USB INTERFACE, SCALE-T Battery Bracket Assembly...
  • Page 101 Mast Wiring Harnesses Table 28 5122 Mast Wiring Harnesses Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 412431 HARNESS BATT HOLDER W/GRD SCALE-T 727162 ADHESIVE BACKED LATCHING WIRE CLIP 412602 HARNESS LOW D-PCA TO M-PCA SCALE T...
  • Page 102 Slider Base Assembly Table 29 5122 Slider Base Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726896 SLIDER BASE BOTTOM PLATE SCALE-T 726897 SLIDER BASE OVERLOAD PROTECT PLATE 726899 LOAD CELL, GPBS-150KG, 3S, SCALE-T 726749 SCREW, 1/4-20X5/8"...
  • Page 103 Load Cell Assembly Table 30 5122 Load Cell Assembly Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726897 SLIDER, BASE, OVERLOAD PROTECT, PLATE 726899 LOAD CELL, GPBS-150KG, 3S, SCALE-T 726749 SCW, 1/4-20 X 5/8”, HEX, BUTTON HEAD, SS...
  • Page 104 Base Wiring Harnesses Table 32 5122 Base Wiring Harnesses Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726899 LOAD CELL, GPBS-150KG, 3S, SCALE-T 138019 TAPE, ALUMINUM 3/4" X 60YD 412602 HARNESS, LOW, D-PCA TO M-PCA, SCALE-T...

  • Page 105: Troubleshooting

    Troubleshooting Scale Troubleshooting The following beeps occur when using the scale. Sound Meaning One beep Acknowledgment of a button press Two beeps A zero weight is obtained and ready to take a measurement Three beeps Weight reading is obtained and displayed No print, four short A print was requested, but valid weight is not displayed on the scale (for e.g., beeps...
  • Page 106 Check that the weight platform is plugged into the readout. The platform cable, connector or load cell transducer may be defective. The load cell transducer’s resistance can be checked with an ohmmeter after unplugging from the readout. The proper resistance values are listed below: 5002, 5702, 6002 SCALES: WIRE COLORS (PIN NO.) RESISTANCE WHT(4)/RED(5) 1000 ±...

  • Page 107: Symptoms And Solutions

    Full Scale Output 1.7 mV/V ± 0.2% Consult Welch Allyn if readings differ from those shown. NOTE: Ohmmeters will not indicate a change in resistance of the load cell transducer when weights are applied to scale. This is due to the extremely small change in resistance of the strain gauges employed (<1 ohm) and the fact that the bridge configuration presents a constant value of resistance when measured from its terminals.
  • Page 108 Cracked Base, Metal Frame - Replace the Base. broken, loose around the weld edges Mast is loose Loose Bolts Tighten the bolts that hold the MAST onto the base. Inaccurate Mechanical Hang- Inspect the 4 nylon feet – if missing or damaged replace Delron feet. Weight Readings up on Platform with the 4 Corner...
  • Page 109 To reinstall button head screw’s, apply some removable Loctite 220 to each screw. Avoid over tightening the screws. Turn screw all the way down and then turn screw back 1/4 turn. Bad Load Cell Removing the top plate, the load cells will be visible. Enter into “Service Mode”...

  • Page 110: Appendix

    727394 5002 CORNER POST 727395 5002 WHEEL INSERT 727396 PACKING, INSERT HOLD-DOWN,5002, SCALE-T 727392 PACKING, CARTON BOX COVER, 5002, SCALE-T 5702 Welch Allyn Part Number Welch Allyn Part Number Description 727655 PACKING, CARTON BOX BODY, 5702/6002 727657 PACKING, INSERT CORNER, 5702/6002, SCALE...
  • Page 111 727652 PACKING, INSERT BOTTOM, 5702/6002, SCALE 727658 PACKING, INSERT PAD, 5702/6002, SCALE-T 727653 PACKING, INSERT TRAY, 5702/6002, SCALE-T 727395 PACKING, INSERT WHEEL,5002, SCALE-T 727654 PACKING, INSERT HOLD-DOWN, 5702/6002 727656 PACKING, CARTON BOX COVER, 5702/6002 6702 6702W/SP Platform Assy Welch Allyn Part Number...

  • Page 112: Full Assembly Exploded Views

    Full Assembly Exploded Views 5002...
  • Page 113 Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 412662 BASE WELDMENT 5002 SCALE-T 139041 WASHER FLAT NYLON 1 1/4" X 1/4" 130060 SCREW 10-32X1/2 FHS FOR DELRON 50502 WHEEL 4" 50314 BUSHING, WHEEL 5/16" X 1"...
  • Page 114 OVERLAY, GRAPHIC, MAST, WPRINT, SCALE-T 132074 WASHER, 3/8" ID X 1" ODSS 130234 BOLT 3/8-16 X 3 3/4" HEX HEAD 50241 HANDRAIL, 5002, SCALE-T 50529 1/4-20 X 3/4 BUTT HD SOCK SCR 726600 MAST CASE HIGH WO PRINTER SCALE-T 726499...
  • Page 115 5122...
  • Page 116 Unique Welch Allyn Part Qty Welch Allyn Part Number Description Identifier Number 726896 SLIDER BASE BOTTOM PLATE SCALE-T 726897 SLIDER BASE OVERLOAD PROTECT PLATE 726899 LOADCELL GPBS-150KG 3S SCALE-T 726749 SCW, 1/4-20 X 5/8”, HEX, BUTTON HEAD, SS 727768 SCW 10-32X3/4" FLAT HEAD SOC CAP SCRW...
  • Page 117 412602 HARNESS, LOW, D-PCA TO M-PCA, SCALE-T 727162 ADHESIVE BACKED, LATCHING, WIRE CLIP 715822 CABLE TIE HOLDER WITH ADHESIVE 113P464 CABLE TIE, 6 INCH 727306 HARNESS, CONT, GND, SCALE-T 412430 HARNESS, USB INTERFACE, SCALE-T 726495 SLIDER, MAST, WO/AC, SCALE-T...
  • Page 118 5702...
  • Page 119 Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726497 BASE WELDMENT 6002/6502 SCALE-T 139040 FOOT PLASTIC I 3/4" X 3/8" 726749 SCW, 1/4-20 X 5/8”, HEX, BUTTON HEAD, SS 50502 WHEEL 4" 50314 BUSHING, WHEEL 5/16" X 1"...
  • Page 120 SEE BATTERY ACCESS PANEL Table 1, identifier 6 726609 PLATE, PRINTER HOLDER, MAST, SCALE-T 726610 PRINTER, MECH, MARTELL, SCALE-T 726555 BRACKET, USB PCBA, SCALE-T 412273 PCBA USB SCALE-T 727161 SCREW 3/24X1/4 PHILLIPS PHP PLASTITE 726746 SCREW, 6-32X7/16”, HEX RHS, ZINC STEEL 726611 COVER, MAST, READOUT PANEL, SCALE-T 412270...
  • Page 121 6002...
  • Page 122 Unique Welch Allyn Qty Welch Allyn Part Number Description Identifier Part Number 726497 BASE WELDMENT 6002/6502 SCALE-T 139040 FOOT PLASTIC I 3/4" X 3/8" 726749 SCW, 1/4-20 X 5/8”, HEX, BUTTON HEAD, SS 50502 WHEEL 4" 50314 BUSHING, WHEEL 5/16" X 1"...
  • Page 123 24014 SCW, 6-32 X 1/4 " PHIL PAN STEEL NICKEL 130204 SCW, 6-32 X 1/4" FHMS UNDERCUT, ZINC 749201 "D" CELL BATTERY SEE BATTERY ACCESS PANEL Table 1, identifier 6 726609 PLATE, PRINTER HOLDER, MAST, SCALE-T 726610 PRINTER, MECH, MARTELL, SCALE-T 726555 BRACKET, USB PCBA, SCALE-T 412273...
  • Page 124 6702...
  • Page 125 Unique Welch Allyn Welch Allyn Part Number Description Identifier Part Number 726498 WELDMENT, BASE, 6702, SCALE-T CS-206 WASHER, FENDER .28" X 1.5" 726340 WSHR,0.281"ID,1.5"OD,0.11"- 0.14THK 139040 FOOT PLASTIC I 3/4" X 3/8" 60624 SCREW 1/4-20 X 1" FHSS 50502 WHEEL 4"...
  • Page 126 30374 WASHER, 0.318" ID X 0.738" OD X 0.062 TK 33004 WSH, 1/4 STEEL SPLIT LOCK 25066 BOLT. 1/4-20 X 1" HEX HEAD, SS 726603 HARNESS, INTERIOR, MAST, COMMON, SCALE-T 412432 HARNESS, POWER JACK, DC, 2-5MM, SCALE-T 726494 SCREW, 1-32 X 3/8", RH, TORX, THREADFORM 726616 BRACKET, MAST, BATT HLD, SCALE-T 412431...
  • Page 127 6702W...
  • Page 128 Unique Welch Allyn Welch Allyn Part Number Description Identifier Part Number 726498 WELDMENT, BASE, 6702, SCALE-T CS-206 WASHER, FENDER .28" X 1.5" 726340 WSHR,0.281"ID,1.5"OD,0.11"- 0.14THK 139040 FOOT PLASTIC I 3/4" X 3/8" 60624 SCREW 1/4-20 X 1" FHSS 50502 WHEEL 4"...
  • Page 129 039301W HANDLE MAST GRAY 039302W PIN ALIGNER MAST HANDLE 30374 WASHER, 0.318" ID X 0.738" OD X 0.062 TK 33004 WSH, 1/4 STEEL SPLIT LOCK 25066 BOLT. 1/4-20 X 1" HEX HEAD, SS 726603 HARNESS, INTERIOR, MAST, COMMON, SCALE-T 412432 HARNESS, POWER JACK, DC, 2-5MM, SCALE-T 726494 SCREW, 1-32 X 3/8", RH, TORX, THREADFORM...
  • Page 130 6702SP...
  • Page 131 Unique Welch Allyn Welch Allyn Part Number Description Identifier Part Number 726498 WELDMENT, BASE, 6702, SCALE-T CS-206 WASHER, FENDER .28" X 1.5" 726340 WSHR,0.281"ID,1.5"OD,0.11"- 0.14THK 139040 FOOT PLASTIC I 3/4" X 3/8" 60624 SCREW 1/4-20 X 1" FHSS 726253 BRACKET, 6702-SP STABILIZER SCALE-T...
  • Page 132 139041 WASHER FLAT NYLON 1 1/4" X 1/4" 727201 MAST CASE, HIGH, WITH PRINTER, SCALE-T 039301W HANDLE MAST GRAY 039302W PIN ALIGNER MAST HANDLE 30374 WASHER, 0.318" ID X 0.738" OD X 0.062 TK 33004 WSH, 1/4 STEEL SPLIT LOCK 25066 BOLT.

  • Page 133: Fastener Reference (Not To Scale)

    Fastener Reference (NOT TO SCALE) Welch Allyn Welch Allyn Part Description and Image Part Number 23335 SCW 1/4-20X3/8” BHCS SOCKET 24014 SCW 6-32 X 1/4 PHIL PAN STEEL NICKEL 25066 BOLT 1/4-20 X 1” HEX HEAD SS 30374 WASHER, 0.318" ID X 0.738" OD X 0.062 TK...
  • Page 134 50314 BUSHING, WHEEL 5/16" X 1" 50518 WASHER, 0.281" X 1.000" X 0.125" 50529 1/4-20X3/4 BUTT HD SOCK SCR 50542 CLIP, METAL CABLE 3/16" 50614 SCW, 5/16-24 X 1 3/4" HEX CS GRD 8, NICK 52523 NUT, 5/16-24 HEX NKL 60624 SCREW 1/4-20 X 1"...
  • Page 135 130234 BOLT 3/8-16 X 3 3/4" HEX HEAD 130237 SCW 10-32X3/8” PHIL RND MS SS 131052 NUT 1/4-20 JAM 132074 WASHER 3/8" IDX1” ODSS 133086 LOADMOUNT 3/8" X 1" WITH 3/8" 133110 MOUNT METAL LOAD 726340 WSHR,0.281"ID,1.5" OD,0.11"- 0.14THK 726341 SHOULDER SCREW 1/2" OD X 1/4" L 726348 WASHER,1/4"IDX1"ODX0.060"-0.090"TH 726461 NUT, 1/4-20 SER FLNG, GR5 ZINC SCALE-T 726494 SCREW, 1-32 X 3/8, THREAD FORM...
  • Page 136 726746 SCREW, 6-32X7/16”, HEX RHS, ZINC STEEL 726749 SCW, 1/4-20 X 5/8", HEX, BUTTON HEAD, SS 726773 SCW 5/16-18 1/2" ROUNDED CAP, VIBRATITE 727007 SCW, 10-32 X 1.75" BHCS 18-8, ASTM F879 CW 727161 SCREW 3-24X1/4 PHILLIPS PHP PLASTITE 727547 SCREW, 1/4-20 X 1.75 HHCS SS 727578 1/4 SPLIT RING LOCKWASHER, SS 727768 SCW 10-32 X 3/4"...

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