>>> 'hummer' problem from hebert -- Thu Jun  8 17:33:08 1989 <<<

The high voltage doesn't turn on. I can't coat SEM samples with
gold.

>>> 'hummer' problem from evan -- Fri Jun  9 10:06:57 1989 <<<

problem: no RF
cause: broken circuit breaker
solution: replaced control box with spare. Broken one will be repaired 
when I can locate a 1 amp breaker.

hummer is up

>>> 'hummer' problem from evan -- Wed Aug  2 18:21:16 1989 <<<

Trap has been baked for 5 hrs. Base pressure is < 20 mTorr.

>>> 'hummer' problem from evan -- Tue Sep  5 11:59:15 1989 <<<

Trap baked for two hours. 

>>> 'hummer' problem from evan -- Wed Nov 22 14:09:31 1989 <<<

Trap baked for two hours.
hummer is up

>>> 'hummer' problem from evan -- Thu Dec 14 11:54:53 1989 <<<

Baked trap for 2 hrs.

>>> 'hummer' problem from evan -- Tue Jan  9 16:54:48 1990 <<<

trap baked for 3 hours.

>>> 'hummer' problem from voros -- Tue Feb  6 16:01:56 1990 <<<

symptom problem on hummer from voros (06-feb-1990 15:57)

User Comments:
Does not pump down. Test - ignore.

>>> 'hummer' problem from voros -- Tue Feb  6 16:05:58 1990 <<<

symptom problem on hummer from voros (06-feb-1990 15:57)

User Comments:
Does not pump down. Test - ignore.

Diagnosed as fault (Equipment fault) by voros (06-feb-1990 16:05:30)

Comments from voros at 06-feb-1990 16:05 :
fixwd, machine is up

>>> 'hummer' problem from tom -- Wed Feb 21 11:57:17 1990 <<<

Would not pump down below ~150 mTorr. 

>>> 'hummer' problem from parrish -- Wed Feb 21 14:19:49 1990 <<<

problem:     chamber pressure at 150 mtorr

cause:       roughing-pump pumping at high pressure, proberly bad seal

solution:    removed pump and replaced with a spare. foretrap is being
             bakeout.

>>> 'hummer' problem from bob -- Wed Apr  4 15:18:19 1990 <<<

The High Voltage fails to come on. Hummer down until fixed.

>>> 'hummer' fix from evan -- Fri Apr  6 15:55:20 1990 <<<

problem: no high voltage
solution: reseated all cables and plasma ignited with no problem

baked trap for 2 hours.
hummer is up

>>> 'hummer' problem from raicu -- Tue May  8 14:16:47 1990 <<<

The base pressure is about 80 millitorr and sometimes increases.
There may be a leak.
