Troubleshooting: Difference between revisions
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==== Procedure for restarting the rack ==== |
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The Following Procedures Should Be Followed: |
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<span style="color: rgb(200, 0, 0);"><u>'''There are two important power buttons''' </u></span> |
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1. Head Localization Failure: |
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: The button on the electronics console with the ring of light controls the power to the rack. This light changes colors when the rack is powered up. |
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a. Check Collection Parameters. |
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: The HLU power box, on the top of the new rack, has a button with a light within it. Press this button to turn on and off the HLU unit |
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b. Check head movement. |
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c. Check head coil placement. |
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d. Repeat head localization. |
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'''There are times that the MEG rack needs to be rebooted.''' |
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2. Acq Aborts (crashes): |
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* If the Acq starts with some noisy channels, usually restarting the Acq will make the noise go away. |
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a. Check front panel for electronics failure. Record codes. |
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* If the HLU does not work, you must reboot the entire rack. |
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b. If no electronics failure then re-launch Acq. |
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c. Check collection parameters. |
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d. Re-enter Acq information. |
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e. Fill out a Variance Report. |
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To restart (reboot) the rack: |
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3. Boot Electronics Failure: |
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a. No LED’s – no power. If there is no fan noise or clicking of relays then it is likely that there is a problem with the power. Contact MEG Core staff for assistance. |
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# First you power off the rack. Press the button on the console. |
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b. No LED’s – no 12 kHz Sync signal is being received by the card. Exit Acq then turn the power off and on and try again. Without the 12 kHz sync pulse all the cards in the sub-banks will be held in reset. Check the DSQ 2041 (the source of the sync signal). Check the DSQ2047 bridge cards and fibers. Check the DSQ 2043 is configured correctly for DSQ back or processing bank operation. If the problem persists contact MEG Core staff for assistance. |
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# Next you must power off the HLU box which is located on top of the new rack. Press it to turn off the HLU. |
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# Return to the console and power the rack back on. |
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# Wait about 10 seconds. |
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# Next, turn the HLU box back on. |
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# Now you can launch Acq. |
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c. Flashing yellow – Exit Acq then turn the power off and on and try again. Indicates a failure in the self diagnosis. If the problem persists contact MEG Core staff for assistance. |
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d. Solid yellow DSQ2045 - Exit Acq then turn the power off and on and try again. Indicates a problem in the self diagnosis of DSQ2045. If the problem is persistent contact MEG Core staff for assistance. |
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e. Solid yellow DSQ2010 and/or DSQ2043 - Exit Acq then turn the power off and on and try again. Indicates that there is no clock signal supplied to a bank (via the DSQ2041 and DSQ2047 fiber link).If the problem is persistent contact MEG Core staff for assistance. |
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f. An entire bank or even several cards within a bank fail to boot - check the power supplied to the bank. Contact the MEG Core Facility staff for assistance. |
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g. Slow boot – if a DSQ2043 takes 60 sec to boot rather than the regular 12sec, this is because the data fiber optic link between banks is broken or somehow disconnected. |
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h. Flashing Green Lights – if green lights still flashing after launching Acq then exit Acq. Turn the power off for 5-10 minutes then turn on and try again. |
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i. Report all occurrences; Fill out a Variance Report. Follow-up with the MEG Core staff. |
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Revision as of 11:39, 14 March 2018
Procedure for restarting the rack
There are two important power buttons
- The button on the electronics console with the ring of light controls the power to the rack. This light changes colors when the rack is powered up.
- The HLU power box, on the top of the new rack, has a button with a light within it. Press this button to turn on and off the HLU unit
There are times that the MEG rack needs to be rebooted.
- If the Acq starts with some noisy channels, usually restarting the Acq will make the noise go away.
- If the HLU does not work, you must reboot the entire rack.
To restart (reboot) the rack:
- First you power off the rack. Press the button on the console.
- Next you must power off the HLU box which is located on top of the new rack. Press it to turn off the HLU.
- Return to the console and power the rack back on.
- Wait about 10 seconds.
- Next, turn the HLU box back on.
- Now you can launch Acq.
Contact MEG staff for assistance if you are unable to resolve problem(s).