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No communications with the XEVO TQD - WKB7610

Article number: 7610


  • Unable to control MS in MassLynx tune page
  • Loss of comms with MS


  • MassLynx 4.1
  • Xevo TQD
  • Xevo TQ-XS
  • Xevo TQ-S micro
  • SQD2


Embedded PC does not have communications with the host PC. 


  1. Close MassLynx and the MS console.
  2. Locate the EPC reboot switch on the front of the instrument (small hole just below the power and status LED). 
  3. Push a piece of peek tubing or a paper clip into the small hole mentioned in step 2. This is where the EPC reboot switch is located. 
  4. Wait three minutes for the EPC to run through its boot sequence.
  5. Open MassLynx.
  6. Open the tune page.
  7. Turn on API gas and place the instrument into Operate mode.


Alternatively if the above soft reboot does not work you can try this.

Recycle PC.
Shut all modules on the UPLC stack.
Login to PC.
Turned power back on to Xevo TQD (If the system is vented). Or press the EPC reboot switch as described above if system is under vacuum.
Wait 5 minutes for comms.
Verified comms with Mass Spec by checking Telnet EPC in Microsoft command window.
Enter Masslynx.

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