Question about Symbol Cobra LS1902 Handheld

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My scanner Model LS4278 is not working any more.

Scanner makes 4 beeps and does not scan. I have tried scanning the barcode on the base to reset but it still doesn't work. Do you have any suggestions?

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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

Posted on Oct 20, 2009

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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

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...

3 Answers

3 Beeps after trying to scan


If you are receiving three quick beeps (all the same tone) before a scan the battery is low. If the scanner is more than two years old the battery may need to be reconditioned. It is recommended the battery be reconditioned once a year. The latest revision of the LS4278 manual is here:
http://support.symbol.com/support/search.do?cmd=displayKC&docType=kc&externalId=6983404apdf&sliceId=&dialogID=134112767&stateId=0%200%2014115220

Print page 28 of 414 and scan the Battery Recondition barcode. The scanner will discharge the battery then charge it up again. It goes through this two times so you need to leave it on the charger a while for this process to complete. Hopefully this will resolve your issue. If not, you may need a new battery.

If the beeps are low, medium, high the procedure above still may work, but you might want to call Motorola for assistance. Sometimes hearing the beeps helps to diagnose the problem.

Oct 05, 2009 | Symbol LS 4278 Barcode Scanner

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

Are you able to please give me the reset instructions for a symbol scanner? model: LS4278


Hi, I would be happy to assist you in resetting your LS4278, but it would be helpful to know how you are connected. The Set Defaults barcode will reset all of the scanner settings, but it will also cause you to lose the "pair" (communications) between the scanner and cradle. If you try scanning a barcode at this point you will receive a single beep followed by four error beeps. This just means the scanner is not talking to the cradle. Scan the barcode on top of the cradle. The scanner should give a high low high low series of beeps followed by a short low short high. The short low short high indicates the scanner is talking to the cradle again and you are ready to scan.

If you are connected through the USB port and scan a barcode and get one beep, but do not see data on your host try unplugging the black power supply cable from the cradle. Try scanning your barcode again and it should show up on the host.

Jul 09, 2009 | Symbol Cobra LS1902 Handheld

1 Answer

LS4278 makes the same beep with a valid code vs an invalid code


Contact the Symbol Help-desk at 1-800-653-5350. What you are asking is not possible with the LS4278. What you are probably hearing at the grocery store is the cash register software generating an error beep. The LS4278 is really just a simple scanner( eben though it is cordless) but it has no memory, and therefore cannot be loaded with a database for error correction. That is being generated by the software at the store, not thye scanner itself. For clarification, uyou can call me at the office:

Bill Matisz,
qdata inc.
1-866-306-7226.

Jun 29, 2009 | Symbol LS2208 Handheld

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