MSSC qm7500 Technical Manual
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MSSC qm7500 Technical Manual

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Summary of Contents for MSSC qm7500

  • Page 3: Table Of Contents

    Troubleshooting . . . 3 Servicing . . . 6 Preparing the QM7500 for Servicing . . . 6 Special Notes for Reassembling the QM7500 Printhead . . . 6 Standard QM7500 Assembly . . . 7 Printhead Assembly . . . 8 Controller Assembly .

  • Page 5: Introduction

    Introduction This QM7500 Technical Manual provides you with complete maintenance, troubleshooting and servicing information for the MSSC QM7500 Ink Jet Printer. It also contains a replacement parts list. CAUTION: This manual is designed for use by qualified technicians only. Any unauthorized repairs will void your warranty.

  • Page 6: Maintenance

    QM7500 Technical Manual Maintenance Startup At beginning of each shift: 1) With the spray cap on the solvent bottle, spray the nozzles with solvent. In harsh environments, you may need to spray the nozzles more often than once per shift.

  • Page 7: Troubleshooting

    QM7500 Technical Manual Troubleshooting Problem Possible Cause Solution Row of keys fail to work. Chips loose on the circuit board. Make sure the RAM chip (U8) and the software (U7) are properly installed, and that the Zilog chip is not loose.
  • Page 8 QM7500 Technical Manual Problem Possible Cause Solution One or more valves fail to work, Cable from the controller to the Secure the cable from the resulting in missing dots printhead touched the valve board controller to the printhead with a causing a short.
  • Page 9 Prints unrecognizable characters Power supply has recycled and 1. Type in the correct language when displayed correctly. the QM7500 has defaulted to the code for the language you are Hebrew language. using. (If English is the language being used type ENGL.)

  • Page 10: Servicing

    QM7500 Technical Manual Servicing Preparing the QM7500 for Servicing Before beginning work on the QM7500, follow these steps. Failure to follow these steps may result in serious injury or damage to the unit. To begin servicing the QM7500: 1) Remove the ink bottle.

  • Page 11: Standard Qm7500 Assembly

    QM7500 Technical Manual Standard QM7500 Assembly 1. Controller 4. Bracket Assembly 2. Frame 5. Printhead 3. Power Supply Servicing QM31930/03093 Rev AD...

  • Page 12: Printhead Assembly

    QM7500 Technical Manual Printhead Assembly 1. Valve Retaining Clip 7. Valve Board 2. Tubing (Nozzle) 8. Printhead Button 3. Nozzle Block 9. Regulator 4. Valve 10. Tubing (Valve) 5. Photocell Board 11. Cable from Controller 6. IDC Connector 12. Printhead Top...

  • Page 13: Controller Assembly

    QM7500 Technical Manual Controller Assembly 1. Gasket 5. Controller Bottom Enclosure 2. Lens 6. Printed Circuit Board 3. Display 7. Keypad 4. Tape 8. Controller Top Enclosure Servicing QM31930/03093 Rev AD...

  • Page 14: Backflushing A Nozzle

    QM7500 Technical Manual Backflushing a Nozzle 1) Prepare the QM7500 for servicing. (See page 6.) 2) Remove the printhead cover by removing the three screws from the bottom of the printhead. With the unit flat on the workbench, place your thumb on the regulator and press down lightly as you lift up the top half of the printhead.

  • Page 15: Backflushing A Valve

    11) Plug in the power supply and purge. (See the Owner's Manual for how to purge.) Note: If the QM7500 is not purging, you will not be able to run solvent through the valve. 12) Spray solvent through the valve for several seconds.

  • Page 16: Optional 7 Mm, 15 Mm, And 20 Mm Nozzle Blocks

    3) Replace the photocell board and printhead cover. Be careful not to pinch any of the wires in the printhead. 4) Install an ink bottle, plug the system in, and purge the QM7500 with ink to remove any air introduced into the system.

  • Page 17: Replacing The Regulator

    Replacing the Regulator Removing the Regulator 1) Prepare your QM7500 for servicing. (See page 6.) 2) Remove the printhead cover by removing the three screws from the bottom of the printhead. With the unit flat on the workbench, place your thumb on the regulator and press down lightly as you lift up the top half of the printhead.
  • Page 18 4) Secure the printhead halves with the three screws. 5) Install an ink bottle, plug the system in, and purge the QM7500 with ink to remove any air introduced into the system. Your unit is ready to return to normal operation.

  • Page 19: Replacing The Valve/Photocell Board

    Replacing the Valve/Photocell Board Removing the Valve/Photocell Board 1) Prepare your QM7500 for servicing. (See page 6.) 2) Remove the printhead cover by removing the three screws from the bottom of the printhead. With the unit flat on the workbench, place your thumb on the regulator and press down lightly as you lift up the top half of the printhead.
  • Page 20 QM7500 Technical Manual Installing the New Valve/Photocell Board 1) Plug the valves in on the new valve board. (See Figure C.) 2) Carefully slide in the new valve/photocell board assembly. 3) Slide the nozzle block into position. 4) Slide in the valve retaining clip and seat the valves.

  • Page 21: Replacing The Display

    QM7500 Technical Manual Replacing the Display Removing the Display 1) Prepare your QM7500 for servicing. (See page 6.) 2) Remove the controller from the controller mounting frame. 3) Remove the three screws from the controller bottom to remove the controller top.

  • Page 22: Replacing The Battery

    Typ. Entsorgung gebrauchter Batterien nach Angaben des Herstellers. Removing the Battery 1) Prepare your QM7500 for servicing. (See page 6.) 2) Remove the controller from the controller mounting frame. 3) Remove the three screws from the controller bottom to remove the controller bottom.

  • Page 23: Replacing The Circuit Board

    QM7500 Technical Manual Replacing the Circuit Board Removing the Circuit Board 1) Prepare your QM7500 for servicing. (See page 6.) 2) Remove the controller from the controller mounting frame. 3) Remove the three screws from the controller bottom to remove the controller top.

  • Page 24: Parts List

    Use the Parts List to obtain whatever you might need to expand, upgrade, repair, or maintain your system. The Parts List includes exploded illustrations of system components with a textual parts listing. To place an order, provide your local distributor or MSSC with part numbers and quantities. Parts List...

  • Page 25: Qm7500 100/240V With Us Power Cord

    QM7500 Technical Manual Quantity per Description Part Number Package QM7500 100/240V with US Power Cord QM7500 QM7500 100/240V with International Power Cord QM7500–INTL QM7500 100/240V Arabic QM7500–CHIN QM7500 100/240V Chinese QM7500–ARAB 1. Power Supply, with US Power Cord QMRP16061 Power Supply, with International Power Cord QMRP19706 2.
  • Page 26 QM7500 Technical Manual Quantity per Description Part Number Package QM7500 Standard Assembly Parts List QM31930/03093 Rev AD...

  • Page 27: Qm7500 Printhead Assembly

    QM7500 Technical Manual Quantity per Description Part Number Package QM7500 Printhead Assembly 1. Housing, Printhead Top QMRP15875 2. Housing, Printhead Bottom QMRP21849 3. Clip, Valve Retaining QMRP16053 4. Regulator Assembly QMRP15884 5. Nozzle Block, 10 mm QMRP15895 Nozzle Block, 7 mm (Optional)
  • Page 28 QM7500 Technical Manual Quantity per Description Part Number Package QM7500 Printhead Assembly Parts List QM31930/03093 Rev AD...

  • Page 29: Qm7500 Controller Assembly

    QM7500 Technical Manual Quantity per Description Part Number Package QM7500 Controller Assembly 1. Keypad, Rubber QMRP15788 2. Gasket, LCD QMRP15909 3. Display, LCD QMRP16166 4. Board, PC with Software QMRP15912 5. Cable, Controller to Printhead 1 ft. QMRP15914 Cable, Controller to Printhead 20 ft.

  • Page 30: Consumables - Porous

    8. Hanger, Power Supply QMRP16568 9. Overlay, Keypad Greek QM27392 10. Overlay, Keypad Arabic QM27393 11. Overlay, Keypad Hebrew QM27394 12. Manual, QM7500 Owners QM32004 13. Manual, QM7500 Technical QM31930 14. Card, QM7500 Quick Reference QM32050 Parts List QM31930/03093 Rev AD...

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