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HP3070 testhead critical alarm appear frequently

Question asked by davidlim on Jul 20, 2012
Latest reply on Jan 25, 2017 by dbailey

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Hi guys,

My ICT machine hp3070 testhead behavior is very erractic. Sometime it tripped off during testhead booting and sometime during the card testing.
The message displayed in red color is "Testhead critical alarm" "Testhead down due to lost heartbeat".
Can anybody suggest the root cause for this problem and solution ??

Appreciate your guys help!

Thanks

Regards,
David

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Jon_oc Jul 23, 2012 1:31 AM
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Hi David,

this could be a number of problems , mostly are hardware related

I assume nothing has changed on controller set up, nobody changed set up of network for testead LAN ? (PC or UNIX?)

Assuming nobody chamnged the set up of PC, no firewall changed, no recent update - then Testhead boot can be caused by

power supply issue for hub used on testhead on network

module power unit (MPU) is not working or overheating

- so sounds like a hardware issue
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bsui Jul 23, 2012 2:53 AM
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Hi David,

This might be caused by some hardware in the system loop.

From my experience, If system can boot up successfully some time,

the most possibility to cause this "lost heartbeat" might be "MPU" turn to be unstable.

This unstable mostly is due to overheat, you tester need to do PM to clean the dust.

If after PM, it still happen, you need to try replace the MPU for the module which failed booting up.

Thanks,
Bin
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- davidlim @ bsui on Jul 30, 2012 7:07 PM
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  Hi Bin,
  
  Assume MPU turn to be unstable, how we can determine which MPU having problem if all the module booting successfully?
  
  Thanks
  
  Regards,
  David Lim
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  - Jon_oc @ davidlim on Aug 6, 2012 8:52 AM
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    Hi David, it is very difficult to diagnose hardware problems remotely, or if you dont have a lot of experience on site.
    
    Do you have a problem to call Agilent direct ?? they have regional experts that can help,
    
    i also suggest that you run systems full diagnostics as this should expose any issues, you can execute in a loop if needed
    
    this forum can only help with so much, i wish you luck - but you need to also call local experts at some stage
    
    thanks, Jon
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dbailey Jan 25, 2017 7:31 AM
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Was having intermittent lost heartbeat failures for two reasons:

1) check the squirrel cage blower fans. Even if you diligently clean the filters, the cage itself can fill with crud and allow the testhead to overheat.

2) If you have an ASTEC MPU, check the resistor in the cable harness wired inline with the enable wiring. 39 ohm bad, 68 ohm good.
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HP3070 testhead critical alarm appear frequently

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