>>> 'hitsem' problem from tom -- Mon Jan 30 09:01:15 1989 <<<


The pipe connecting the mech pump to the machine came off.  I replaced it
but  I think Mr. Parrish should take a look at it to see if it is alright.

>>> 'hitsem' problem from parrish -- Mon Jan 30 09:08:23 1989 <<<

system down for repair of the mech foreline.

>>> 'hitsem' problem from parrish -- Mon Jan 30 11:23:22 1989 <<<

problem:    hose slipped off the foreline

cause:      hose deterated from time

solution:   removed old hose and replaced with new hose.

>>> 'hitsem' problem from ee143 -- Fri Feb 24 01:34:56 1989 <<<

the gettering pump is not working.

>>> 'hitsem' problem from rnorman -- Fri May  5 11:01:01 1989 <<<

The hitsem will be down for a ion pump bake, it will be up by the end
of the day.

>>> 'hitsem' problem from bob -- Fri May  5 15:05:21 1989 <<<

The hitsem will be down until mid Monday, May 8th, for maintenance.

>>> 'hitsem' problem from rnorman -- Mon May  8 08:31:30 1989 <<<

Problem: Down due to IP2 was off and IP1 needed baked out.

Cause: unknow, no one used it. It just was found with the IP2 off.

Solution: Flashed the GP's and baked out IP1 before the weekend.
          The hitsem is up and under hi-vac.

>>> 'hitsem' problem from vallath -- Tue May  9 21:34:14 1989 <<<

The hitsem green ready light does not come on.  Also, the vacuum
in both IP1 and IP2 is a little high (~ 2 10-6 and 1 x 10e-8 ).
Usually they are both somewhat lower.
My specimen is in the chamber.
Vallath
p.s.  the vacuums were ok before I loaded my specimen.
I have not yet turned on the HV.

>>> 'hitsem' problem from rnorman -- Thu May 11 08:15:49 1989 <<<

Problem: The green light for IP2 doesn't come on. Also, the vacuum
       is lower then normal in IP1.

Cause: The green light in IP2 take a while to come on especially
     if the getter were not flashed before operation. The vacuum in
     the upper chamber, IP1, is a little lower then normal, but
     nothing bad.

Solution: This morning I check out the hitsem and the green light was on in
        IP2 and the vacuum in the upper chamber was about 5x10-9. This is
        good, not real good but about normal. The hitsem is up for use.

>>> 'hitsem' problem from raicu -- Mon Jun 12 16:32:34 1989 <<<

I flashed the getter pumps. One hour later the high vacuum
was still above 1E-8 and the ready light was still off.

Eugen

>>> 'hitsem' problem from raicu -- Mon Jun 12 16:36:20 1989 <<<

Vallath was going to qualify me on hitsem.
I flashed the getter pumps and one hour later the high vacuum was
still above 1E-8 and the ready light was not on.

>>> 'hitsem' problem from rnorman -- Fri Jun 16 15:03:58 1989 <<<

The hitsem IP was baked out, but I am having problems getting
the lower IP to come on.  It will be down until monday.

>>> 'hitsem' problem from rnorman -- Mon Jun 19 09:46:21 1989 <<<

Problem: The lower IP was not turning on after gun bake.

Cause: Sometimes this happens, I just takes a while.

Solution: I came in this morning a flashed the GP's and
          after that the IP turned on with no problem.
       (note: we are still having a problem with the monitor
        not turning on whe the electronic cabnet power is turned on.)

>>> 'hitsem' problem from rnorman -- Mon Jun 19 09:50:32 1989 <<<

The monitor is not turning on when the main cabnet power is turned
on. This has always been a problem but after turning the power off
and on a couple times the monitor used to come on; not any more though,
the monitor stays off.  The monitor has went out before.

>>> 'hitsem' problem from bob -- Fri Jun 23 09:23:28 1989 <<<

The monitor on the hitsem is not coming on when the power switch is turned
on. This problem will be looked into by Steve Hoagland.

>>> 'hitsem' problem from hoagland -- Fri Jun 23 16:12:17 1989 <<<

A check of the monitor assembly revealed no horizonal or vertical
drive signal was present.  Further diagnosis on the main control
chassis will continue Monday when the unit can be uncabled from the
microscope chassis and dragged out from under the table where it
normally resides.  This may impede use of the AS200- advance notice
will be posted if work on the hitsem will in any way disturb AS200
users.

>>> 'hitsem' problem from hoagland -- Mon Jun 26 17:23:48 1989 <<<

Failure of the hitsem monitor has been traced to a 5 volt power
supply.  This supply's regulator is shutting down with a load
somewhere between 0 and 50 MA rather than the 2.5A it is rated to
provide.  Efforts to locate a replacement for the EMR-RD30537
regulator(obsolete) were unsuccessful.  An effort will be made
to substitute a generic 3A 3 terminal regulator for the failed
component.  A small heatsink is being fabricated to house the part
on the bottom of the main chassis where it will be fastened by cable
to the back of the bad part.  With luck the hitsem should be back up
for use by noon tomorrow.

>>> 'hitsem' problem from hoagland -- Tue Jun 27 16:39:38 1989 <<<

problem:  No raster on hitsem monitor.  LED indicators on 
          display chassis all out.

cause:  5 volt digital power supply failed in main chassis.
        

solution:  Hitachi EMR-RD30537 regulator replaced with LM323
           stand alone unit.  New regulator/heatsink assembly
           is mounted on rear wall of main chassis.

           After powering hitsem on CRT displayed ragged image
           and produced high pitched sound.  Q1 on horizonal
           phase board inside CRT chassis was found bad-
           2SC403C Sony transistor was replaced with 2N3027.

           Raster on CRT is normal.  Efforts to display sample
           image failed due to lack of field emission.  Repair
           of the hitsem will continue tomorrow and results
           posted as available.

>>> 'hitsem' problem from rnorman -- Wed Jun 28 08:58:03 1989 <<<

I tested the monitor and there is not high voltage turning on. The
"FLASH" LED is blinking, but when pushed will not activate. Also,
no emission current from the "CONTROL".

>>> 'hitsem' problem from hoagland -- Thu Jul  6 16:35:08 1989 <<<

One of the position sensor light bulbs on valve V2 is burned
out.  This bulb will have to be replaced before any further
work on the hitsem is possible.  An effort to install a new
bulb will be made on friday(a rather difficult task due to
inaccessibility) and results posted when available.

>>> 'hitsem' problem from rnorman -- Fri Aug  4 11:26:03 1989 <<<

I was looking at the hitsem vacuum problem yesterday and found out
some things: V1-1 and V1-2 detector has an intermittent problem on
one of the lights on the bottom side of V1; also, with V1-2 closed
I did get vacuum in the specimen chamber, though it took a long while.
V2 was working with no problems; thought with V1 power disconnected
V2 will not open or close.  V1 also has a bad motor which will need
replacing, 24Vdc servo motor.  WE HAVE HAD ALOT OF PROBLEMS WITH THIS
SYSTEM LATTLY...!
:wq

>>> 'hitsem' problem from rnorman -- Mon Aug  7 09:36:00 1989 <<<

The push bottons for V1 and V2 do not operate the valve; looks like
a fuse has blown; there is no powewr to the valves.

>>> 'hitsem' problem from rnorman -- Thu Aug 10 07:36:32 1989 <<<

The hitsem is at atmosphere and V1-1, V1-2 and V2 do not operate.
It acts like no power is being applied to the valves; we had this
same problem when Steve was working on the unit.

>>> 'hitsem' problem from rnorman -- Fri Aug 18 14:47:26 1989 <<<

The hitsem is at atmosphere V1 and V2 do not operate.  It acts
like no power is being applied to the valves.  Repair will continue
next week.

>>> 'hitsem' problem from rnorman -- Mon Aug 28 14:28:36 1989 <<<

The hitsem is STILL at atmosphere, because the valves do not operate
to pump down the ion pumps and the chamber.  It acts like the power supply
to the valves is inoperative.

>>> 'hitsem' problem from rnorman -- Tue Sep 12 14:28:10 1989 <<<

The valves to the hitsem don't operate and I did not have the correct 
schematic to find the  problem; a technician had removed it from the manual 
and did not return it.  I contacted Hitachi and they will be sending me
the correct schematic.  When it arrives I will begin troubleshooting
the problem.

>>> 'hitsem' problem from rnorman -- Fri Sep 15 15:01:41 1989 <<<

I got the valves to operate but am having a hard time turning on the
Ion pumps.  will continue next week.

>>> 'hitsem' problem from rnorman -- Mon Sep 18 14:54:46 1989 <<<

I baked the getter pumps but still could not get the IP's to turn on.
RN

>>> 'hitsem' problem from rnorman -- Wed Sep 20 14:24:26 1989 <<<

The hitsem was looked at a little closer today and I found a couple
reasons why the ion pumps would not turn on; the GP1 heater was open
and the upper IP heater was open.  I am waiting for a call for
proper part numbers in which to order these and/or some specs on
the two heaters.

>>> 'hitsem' problem from rnorman -- Tue Oct  3 06:38:47 1989 <<<

The GP heater was ordered and will probably take a month to get here
do to our purchasing.  The Heater rope for the upper IP was also
order and should be here in a week or so.

>>> 'hitsem' problem from rnorman -- Tue Oct 10 14:55:14 1989 <<<

The GP heater was installed along with the IP heater.  I am trying to
start the IP's and will continue tomorrow.  The hitsem is still down.

>>> 'hitsem' problem from rnorman -- Thu Oct 12 14:48:23 1989 <<<

After days of trying, the lower IP started.  It is now pumping on the
upper IP and tomorrow I will try to start it.  The hitsem is still down.

>>> 'hitsem' problem from rnorman -- Tue Oct 24 14:10:15 1989 <<<

I have good vacuum and got an image, but the monitor is showing a 
distorted image, like the CRT coil is out of adjustment.

>>> 'hitsem' problem from rnorman -- Wed Oct 25 09:08:28 1989 <<<

The hitsem will be down to bake the IP's.  The pressure in the upper
IP chamber is high, the "Ultra High" vacuum LED is not illuminated.

>>> 'hitsem' problem from rnorman -- Thu Oct 26 08:05:52 1989 <<<

Problem: The upper IP "Ultra High" vacuum LED would not stay on.

Cause: IP's needed to be baked out.

Solution: The IP's had to baked out twice due to the chamber being at 
          atms during repair of the GP unit awhile ago.  The hitsem
          is up good vacuum and will operate.

>>> 'hitsem' problem from rnorman -- Thu Oct 26 08:15:23 1989 <<<

The monitor has a split image, possible the CRT coil is out of
adjustment.  The vacuum is good now and will operate, but the
monitor now needs repaired.

>>> 'hitsem' problem from rnorman -- Wed Nov  1 11:37:38 1989 <<<

There are 2 problems with the hitsem at this time; the "flash" button
does not engauge and the CRT has a split image.  The vacuum is very good.
The emission current or "HV" will not turn on until the "flash" has been
engauge and the red LED stops blinking.

>>> 'hitsem' problem from rnorman -- Wed Nov  8 14:58:27 1989 <<<

The IPs turned off, will restart tomorrow.

>>> 'hitsem' problem from rnorman -- Fri Nov 10 14:36:41 1989 <<<

Problem: IPs turned off

Solution: They were started up slowly.  The hitsem is pumping
          with the IPs on the specimen chamber.  Monday I
          may have to bake the upper IP.  We still have a problem
          with the monitor, but the monitor can't be fixed until
          the "flash" button is repaired; not engauging flash of tip.
          

>>> 'hitsem' problem from rnorman -- Mon Nov 13 08:55:53 1989 <<<

The IPs are baking out at this time.

>>> 'hitsem' problem from rnorman -- Mon Nov 13 15:04:54 1989 <<<

The IPs have been baked out and the hitsem is under hi-vac.  We still
have a problem with the flash button and the monitor has a split image.
From rnorman Thu Dec 14 07:05:44 1989
Received: by argon (5.57/1.16)
	id AA25826; Thu, 14 Dec 89 07:05:42 PST
Date: Thu, 14 Dec 89 07:05:42 PST
From: rnorman (Robert L. Norman Jr.)
Message-Id: <8912141505.AA25826@argon>
To: hoagland
Subject: Re: hitsem
Cc: bob, katalin
Status: R


Steve, that is the problem with the tip, it will not flash.  It was acting 
intermittently a couple times then it stoped working, as you know.  No tip
was resently installed, the old tip was working. The tip must be flashed
before an image can be produced, there is an inerlock.  Now that you
know the switch works you can check the electronics. The flash must be
repaired before you work on the video problem, because the tip is
non-functional durring the flash period.  The question at this time
is: Since the switch is working, why is the flash circuit not engauging
flash current to the tip?  Someone with your talent can find the
answer to this question.

Robert


>>> 'hitsem' problem from rnorman -- Fri Dec 15 12:33:16 1989 <<<

Steve looked at the hitsem and found the "flash" button good.  The tip will
not operate until we get the "flash" circuit working, because when the "flash"
red LED is flickering the tip will not operate, due to an interlock, until the
tip is flashed.  At this time the flash circuit prevents the
troubleshooting of the monitor split image problem.  DO NOT OPERATE!

>>> 'hitsem' problem from rnorman -- Tue Jan 16 07:44:01 1990 <<<

I'm not sure what Steve did, since he was working on the hitsem 
for a while before he left.  I know the "flash" button does not ingage
the fash circuit and the video monitor has a split image on the 
screen; this video problem occurred after the monitor was repaired the
first time.  Steve was repairing a test circuit for the "flash"
circuit, but he made no comment to me or in the computer log if he
fixed it. The hitsem is still down. ***DO NOT OPERATE***

>>> 'hitsem' problem from bob -- Tue Jan 23 09:45:39 1990 <<<

The hitsem is down due to image problems and a tip that won't flash.
Gary  Swanson on Hitachi (1-408-432-0520) has been called and he
estimates it will take up to 2 days of labor to make these repairs.
It is possible they will negotiate some reduced charges if the insturment
is delivered to them. In addition they will offer some training on it.
Repairs are pending subject to a review of the value of the hitsem in
the microlab.

>>> 'hitsem' problem from bob -- Mon Feb 12 14:12:58 1990 <<<

The hitsem will be removed from the Microlab as a piece of equipment.
It is being retired due to its age and limited capabilities. Bill Kumpf
of Excess and Salvadge will be consulted for sale of this insturment.
roberto@janus will be asked to do the paperwork.

>>> 'hitsem' problem from evan -- Fri Mar  9 09:40:40 1990 <<<

As part of nanospec/ analytic area move, I have removed the taurus box and
cables.  this frees up dport #33. I am removing the hitsem's equipcap entry.
bye-bye hitsem
