Question about Symbol LS4278 Cordless Barcode Scanner - P/N LS4278-TRWM0100ZWR Barcode Scanner

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Model LS4278. We've had this model for at least a year. The base is on and working, but the red beam won't even light up. The scanner has been on the base all evening. This is the very first time this has ever happened. Do you think the battery pack is bad inside and needs to be replaced.

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Yes possibly as most of barcode scanner that has a "base station" where the scanner is placed has a battery on it.

Posted on Nov 18, 2009

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Why doesn't it scan?


usually you need to configure the reader to tell it what kind of barcodes you want it to read and how to interpret & output the codes to your computer (whether you need prefix or suffixes to your codes( for automation))

the user manual for the reader has some bar codes to configure the settings for the scanner.

Jan 27, 2016 | Zebra Symbol LS4278, Bluetooth, Blood Bank...

1 Answer

My canner ls4278 is making a sound and turnin red when i scan


It could be the scanner is not paired to the cradle. The scanner will be once for the barcode and then four times for the communication error. Make sure the cradle has power; it will pull power from a USB port. Scan the pairing barcode on top of the cradle. The scanner will give a high low high low beep and then shortly after give a short low short high beep indicating the radios have paired. If the scanner still beeps four times after doing this, the host type may not be set. If connecting USB scan HID Keyboard from the LS4278 Product Reference Guide.

Jun 10, 2014 | Symbol LS 4278 Barcode Scanner

1 Answer

My ls4278 is not lighting up when on the cradle, will not scan or charge...i have 3 scanners and cradles and somehow all the scanners stopped working completely..all the cradles have the light on but when...


The most unlikely scenario is that all the bases are defective. If you power your PC off every night, you should purchase a power supply so the scanners can continuously charge. Another issue may be that you need new batteries (also unlikely if they stopped working at the same time). Also try swapping scanners and bases (one scanner from one base and place it with another base) make sure you firmly place the bottom of the scanner in the base to verify there is a good connection with the charging pins. We are here to help if you have further questions.
Tech Support Barcoding Technical Support

May 18, 2011 | Symbol LS 4278 Barcode Scanner

1 Answer

Handset green light is flashing on and off and there is no red light. When I try to scan a bar code with the handset it does not scan. How do I replace the battery in the handset?


Hi, there are detailed instructions for replacing the battery in the LS4278 Product Reference Guide on page 27 of 414.

Use a philips screwdriver and turn the screw in the base of the scanner counter clockwise to remove the latch at the bottom of the scanner.
Turn the scanner upright to slide the battery out.
Disconnect the battery clip.
Reattach the battery clip.
Make sure the new battery is securely in well of scanner.
Attach and close latch.
Use philips screwdriver to press down gently and turn screw clockwise to lock latch in place.

Feb 08, 2011 | Symbol LS 4278 Barcode Scanner

1 Answer

I have a symbol LS4278 scan gun. When I place the gun in the cradle it blinks with an amber light. In the documentation that says that it has a "Critical battery temperature fault". I replaced the...


Hello Lynda,
this seems to be an error with the charging system of the scanner. As you stated the error occurs also with other battery. Just check if the scanner is in warranty and send it for repair.
It could work also with this error, but the charging will not work correctly. As the temperature error is safety measure which stops the charging until the status get changed.

Aug 02, 2010 | Zebra LS4278 Cordless Bar Code Reader...

1 Answer

LS4278 scanner can't read digits


Hi, try scanning French Windows barcode from the USB section of the LS4278 Product Reference Guide. The barcode is on Adobe page 147 of 414. You may also have to scan the Enable Keypad Emulation barcode from Adobe page 150 of 414, but I would do this only after testing with the French Windows setting first. I suggest saving a copy of the document before printing the barcodes just to make it easier to print. Hopefully this will resolve the issue.

Oct 16, 2009 | Symbol LS 4278 Barcode Scanner - P/N...

1 Answer

My scanner Model LS4278 is not working any more.


There is more setup needed and troubleshooting, please contact me so I can guide you how to get this scanner working You can always contact me by phone or email 630-622-2024 akowalski@legacyglobal.com Please visit our website www.legacyglobal.com

Sep 24, 2009 | Symbol Cobra LS1902 Handheld

1 Answer

How can you use a symbol model ls4278 with a usb converter for the ps/2 plug?


The scanner will probably give you error beeps because you are not using a PS/2 keyboard. All you should have to do is scan the IBM AT Notebook barcode from the LS4278 Product Reference Guide. The link below will take you to the manual and the barcode is on Adobe page 104 of 418. I would suggest saving a copy then printing just the page you need.

If the scanner does not start working immediately you should reboot your computer.

LS4278 PRG:
http://support.symbol.com/support/search.do?cmd=displayKC&docType=kc&externalId=6983403apdf&sliceId=&dialogID=116526806&stateId=0%200%2011869362

Jul 21, 2009 | Symbol LS4278 Handheld Barcode Scanner

1 Answer

Red Beam stuck on


You sound like a pretty experienced user. You've likely already tried pulling the battery for an hour replacing the battery, and then defaulting.

If you haven't try it. Symbol gear is excellent, but even BMW'a break occasionally. Our shop is one of many that can effect a hardware repair.

Nov 27, 2007 | Symbol LS 4278 Barcode Scanner

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