Fex21 Series Support

Repair Purchase

Genuine OEM parts

Handheld Systems repairs Husky, Itronix, and Itron handheld computers to factory specifications. As an Authorized Repair Center, our technicians receive specialized training at Itronix Headquarters and are able to provide outstanding repair services. To assure quality, we use only factory OEM parts purchased directly from the manufacturer.


Our flat rate fee to repair and refurbish a Fex21 is $425. Service Center Repairs include:

  • Diagnostic testing
  • Replacement of all defective parts (motherboard replacement subject to additional charges)
  • Replacement of worn and scratched parts
  • Saving and restoring data files and programs stored on removable media
  • Cleaning inside and outside of unit

Turnaround Time

While we try to complete service as quickly as possible, a typical turn-around time is 2 to 5 working days from the time HHS receives the equipment. Handheld Systems offers Service Center contracts and upgrade options if your business requires additional support. We also have new and refurbished Fex21’s in stock and a complete line of accessories.

Repair Request

The following information is needed prior to sending equipment in for repair.

  • Serial Number
  • Return address
  • Credit card information (we won't exceed $425 unless authorized)
  • Return shipping method (ex. 1 day, 2 day, 3 day, Ground)
  • Brief description of the problem

You can submit this information by calling our Support Center at 503-282-2857 or by using our online repair purchase form.


Repairs can be shipped to the following address:

  • Handheld Systems, Inc.
  • Service Department
  • 5319 SW Westgate Drive, Suite 164
  • Portland, OR 97221

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Fex21 PCB Repair

Latest Lab Equipment

Handheld Systems uses the latest through-hole and surface-mount equipment for performing repairs. We are often able to repair the main motherboard at the component level as opposed to replacing the entire assembly, which can exceed $1000.

Motherboard repairs include replacing faulty parts that populate the board and repairing broken traces caused by age or corrosion. Contaminates are then removed from the PCB, extending the motherboard life.

Each Fex21 is restored to original factory specifications, passes all diagnostic tests, and is warranted for 90 days. We replace all worn or defective parts using only Husky Certified parts.

The operating system image is updated when applicable and all files are restored after completing the repair. Each unit is then cleaned to remove accumulated grime from the case assembly.

Common Repairs

When restoring a unit to factory specifications, the following items are commonly replaced or repaired:

  • Display assemblies
  • Touch screens
  • EL panels
  • Backup Batteries
  • Case and Screw O-rings
  • Pressure leaks
  • Broken or cracked case assemblies
  • Modem PCB
  • Faulty power circuits
  • Communication ports
  • Keyboards
  • Keyboard membranes
  • Speakers
  • Barcode scanners
  • CompactFlash slots
  • PCMCIA slots
  • Dock interface PCB
  • IrDA PCB

Diagnostic Testing

The repair process begins and ends with thorough diagnostic testing. Initial diagnostic testing identifies hidden faults that may not be readily apparent. After repairs are completed, final diagnostic testing is performed to confirm that the unit is operating perfectly with no data loss.

Units that fail the final tests are re-examined and re-tested. Contact Handheld Systems for a detailed list of the diagnostics performed on each repair.

ESD Workplace

All worksurfaces are made from ESD rated laminates and meet commercial industry standards. All ESD-susceptible items are opened or removed from protective containers only within an ESD protective workstation or area.

Personnel are grounded when handling ESD-susceptible items. When seated, they wear a wrist strap fitting snugly on the skin and have it plugged into a common-point ground. Unnecessary, high-charging materials are removed from ESD-protected worksurfaces, particularly common plastics or any other electrostatic-generating items.

ESD mats and conductive/dissipative surfaces are cleaned regularly and only with cleaners that do not leave an insulative residue. All ESD-susceptible items are identified with ESD susceptibility symbols and are enclosed within ESD shielding bags or other sealed conductive or shielding container during storage or transportation outside an ESD protected area.

Personnel are tested and trained to verify that they understand the principles of ESD control and how to effectively use ESD protective equipment. A monitor is used to continuously test the wrist strap and static mat connections and sounds an alarm when the work area is no longer ESD safe. Routine auditing and inspection of ESD-protected work areas are conducted at regular intervals.


Handheld Systems warrants that the repair will be free from defects in material and/or workmanship, which occur during normal use, and that it shall perform in accordance with OEM specifications for 90 days from date of shipment. Handheld Systems will repair the equipment during the warranty period free of charge in the United States. A purchase receipt or other proof of purchase may be required prior to warranty service.

Technical Support

Handheld Systems provides free technical support to our customers throughout the world. Technical support can be obtained by calling our office between 7:30 A.M. and 6:00 P.M. Pacific time, Monday through Friday. You can also send us your questions via email.

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Repair Specs

Husky Models

  • Husky Fex21
  • Husky Fex21-HD
  • Husky Fex21-DOS
  • Husky Fex21-S

Itronix Models

  • Itronix Fex21
  • Itronix Fex21-HD
  • Itronix Fex21-DOS
  • Itronix Fex21-S

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Models Serviced

My Fex21 won't turn on, even when connected to a AC wall charger.

If the unit has been in storage, you may need to do a hard reset:

  • Caution: Performing a hard reset will destroy all data and programs stored in memory. If possible, save these items to an external storage device before proceeding. A hard reset does not affect operating system files, however the registry will be reset to the factory default.
  • Connect the Fex21 to an AC wall charger and press the power key. If the unit will not turn on, proceed to the next step.
  • Hold down both contrast keys, the power key, and the left backlight key for about 10 seconds. The Fex21 will perform a hard reset and switch off.
  • Press the power key to restart the unit.
  • If the unit still won't turn on, it will need servicing.

After the unit reboots it will need to be left on the charger for at least 24 hours so that the internal backup battery has time to recharge.

Husky Keyboard

Where is the serial number located?

The serial number is located on the back of the unit near the backstrap:

  • Lightly slide the backstrap to the side of the machine.
  • The serial number will begin with the numbers 70000 or 72000.

My Fex21 touch screen will not calibrate.

  • Press the CTL+ALT+= keys to display the calibration screen.
  • Using a stylus, press and hold each target until the target moves to a new location. Ensure that only the tip of the stylus touches the screen during the calibration process. Repeat this process several time if needed. When calibration is successful, the target will vanish and further instructions will appear. Proceed to the next step if this fails.
  • Perform a hard reset. See the section above titled 'My Fex21 won't turn on, even when connected to a AC wall charger'.
  • After the Fex21 reboots, attempt to recalibrate the screen again.
  • If the unit still won't calibrate, the unit will require a new touch panel. Contact service to schedule the repair.

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File Version Size Format Description Download
Microsoft ActiveSync 3.8 3.7MB Zip Microsoft® ActiveSync™ 3.8 compares and continuously updates the information stored on your PC and your handheld, so both contain the same data. This is the latest version of ActiveSync that is compatible with the Fex21.
Getting Started with your Husky Fex21 1.02 190K PDF An electronic copy of the User leaflet that comes with each new Husky Fex21. Includes useful operating instructions such as how to adjust the contrast, replace and charge the batteries, and clean your Fex21.
LiION Battery Reference Issue B 230K PDF Fex21 battery reference manual for 129Mhz Fex21 with Li-Ion battery
Desk Mount User Guide 1.01 348K PDF Fex21 desk mount user guide.
Vehicle Mount User Guide 1.01a 288K PDF Fex21 vehicle mount user guide.
Charging Failure TN552 18K PDF Fex21 charging failure technical note
9-Pin charger Adapter TN556 17K PDF Fex21 9-Pin charger adapter technical note
Charging Troubleshooting TN557 138K PDF Fex21 charging features/troubleshooting technical note
Charging and Battery Management TN558 92K PDF User guide to Fex21 charging and battery management technical note
Husky Fex21 API library NA 39KB Zip The API is important for those developers who wish to make use of the Husky Fex21’s unique features from a familiar programming environment such as Microsoft Visual Studio ® 6.0 for C/C++ ® 6.0.

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