Hi All.
I'm in Japan and having a problem with a US monitor.
It won't turn on...no power light or power up noises
or anything.
So I measured voltage across neutral and ground and
there was 8VAC. So I got an electrician to wire up a
proper ground. There's still 1VAC across Neutral and
Ground.
So I have two theories:
1) The monitor is seeing the floating ground and not
liking it and refusing to turn on.
2) The monitor requires at least 110V (I'm getting
103V).
I'd hate to think this thing just died, so can anyone
confirm that a ground to neutral measurement should
yield 0V or some very negligible voltage?
Assuming the above two theories are bunk...any other
ideas?
Thanks for any help anyone can provide :(
Thanks!
Sellam
__________________________________
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Now, in the loft I have a pair of Archive 5945C 60MB drives
They're QIC-36 interface drives apparently.
--
Correct, the basic drive mech is QIC-36
--
Emulex MW0210402's
--
Should be MT02
--
in order to stand a
chance of reading these tapes, do I need to know what board was
originally used (and even which drive!) in order to write them?
--
It would certainly help. MT02's are SCSI common command set and
can read QIC-11 or QIC-24 formats.
If the carts are DC300,450, or 600 and they were written on a
80's - ish unix box, they will probably be readable with a 5945
and MT02.
Be ABSOLUTELY sure that the capstan hasn't deteriorated before
trying to do anything with a tape you care about, though. Most
drives that old have rubber that has turned to goo, or WILL turn
to goo once heat is applied though the motor shaft.
Docs for both the Archive drive and MT02 are up on bitsavers.
I guy told me that the :C optical reader was great for scanning books into
your computer, so I got one out of the warehouse and loaded the software
that came with it. Now the problem is I can not get to the company website
to get the code to use the software? Does anyone know if there is a generic
code that I can use to work the scanner? I want to start scanning in all the
books in the collection into my laptop (I have over 1200 books to enter).
Thanks for any help or leads in finding the company or the code.
I recieved a query about a computer from you, probably related to this
list,
since your email id was VCM(a)swtpc.com. All attempts to reply to your
email bounces due to your spam control. You may reach me at
jws(a)world.std.com
about the computer you had contacted me about on 4/29/2004.
sorry for the delay, but the bounces were buried in spams titled as
email
bounces with phishing in them.
Jim
Hi
A 12v filament transformer can be used to
boost the voltage. Also, Japan is 50Hz so
that may also be an issue.
One could even use an AC wall wart as long
as the output current was rated as high as that
used by the monitor. You just need to experiment
with the lead polarity to get the phase to boost.
You'd need to put this all in a closed box for safety
because the output wires of a wall wart are not
usually rated for 115V.
Dwight
>From: "Brent Hilpert" <hilpert(a)cs.ubc.ca>
>
>"Phab E. Oh" wrote:
>> I'm in Japan and having a problem with a US monitor.
>> It won't turn on...no power light or power up noises
>> or anything.
>>
>> So I measured voltage across neutral and ground and
>> there was 8VAC. So I got an electrician to wire up a
>> proper ground. There's still 1VAC across Neutral and
>> Ground.
>>
>> So I have two theories:
>>
>> 1) The monitor is seeing the floating ground and not
>> liking it and refusing to turn on.
>> 2) The monitor requires at least 110V (I'm getting
>> 103V).
>>
>> I'd hate to think this thing just died, so can anyone
>> confirm that a ground to neutral measurement should
>> yield 0V or some very negligible voltage?
>>
>
>If you are measuring between GND and neutral, a few volts measured is not
surprising (especially with a DMM with a high input impedance), resulting from
inductive/capacitive coupling between wires over the distance between your
measurement point and where GND and neutral are bonded in the building (assuming
that Japan does a straight GND/neutral bond as is done in North America).
>
>The 103V supply voltage is far more suspicious, as it is quite low relative to
115V (you don't say how old the monitor is, could it be that it predates power
supplies with 'universal' supply voltage range?). Try finding a power adapter
transformer to boost the voltage. (Normal Japanese line voltage is lower than
North America isn't it?). Or if you are around electronics people, try to find a
variac, as variacs typically have some boost on the upper end of their range
(for example, a variac fed with 120V will typically boost to at least 130V,
keeping in mind if the variac scale is presented in volts, the scale accuracy
will vary with the input voltage). (Or, being very careful not to go to the low
end, wire up the variac in reverse).
>
>Or (if the monitor is older) there's always looking inside the monitor for
jumpers, or alternative primary taps on a power transformer, to select input
voltages.
>
Thom Restivo is supposed to be coming to VCF-East and should be in the Boston area on Thursday. I am trying to contact him on his cell phone but I keep getting voice mail. If someone sees him on Thursday or early Friday, could you ask him to call me at 803-920-2064? He's supposed to be picking some equipment up for me on Friday, but I need to talk to him to work out the logistics.
Thanks,
Ashley Carder
Chuck,
In the future
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He gave me 15 QIC-Tapes with it, unfortunately no documents.
--
Moreover,serveral tapes are corroded.
--
There were many different recording formats used with DC300 style
tape cartridges before the QIC standards were established. Onyx
tapes predate those standards. Assuming the tape itself isn't
damaged, you can put the reels into new shells. You will need to
use a DEI drive to read them.
As I keep telling people, DON'T EXPERIMENT WITH TAPES YOU CARE
ABOUT WITH DRIVES IN UNKNOWN CONDITION!
It sounds like the capstan was bad in the unit, try some other
cart you don't care about before risking these tapes (which are
quite rare) in that drive.
It would be a good thing to take high resolution pics of the boards
and to dump any programmable parts.
A lot of people have been asking me how to transfer the contents of
HP Series 80 floppies to a modern machine (and vice versa, of course).
Up till now I have been using my Integral PC to upload binary images of the
Series 80 floppies. The reason I prefer the images to the files created
by LIFUTIL, is that the image can be copied back to a new floppy
without dealing with the filename conversions, restoring the diskette
volume name, etc.
The problem with this approach is that only people with Integral PCs
(or other HP-UX systems with HP-IB interfaces) may use this path [1],
plus that I need to unpack and fiddle with the Integral PC every time
I need to make a copy. Moreover, getting the stuff *off* the IPC is
a pain because I only have the HP-IB interface.
Anyway, while reading the old PCC Computer Journal issues, I came
across a very interesting article by Pete Goffinet on how to use the HP
binary utility "r" which is provided with the HP-86/87 Demo Disc.
"r" is a binary program that contains two commands, RSECTOR for reading
arbitrary sectors of an HP-IB mass storage device, and WSECTOR for
writing them!
I have written a pair of programs (one for the HP-87 and another for
my Unix box) that allow entire images to be uploaded using an HP-87
with a serial interface.
Writing a program to download images is also trivial. Do note that
the programs I have written are unbelievably slooooow. If anybody
can come up with some sort of speedup, pls let me know.
Also, "r" works only on the HP-86/87, so the procedure will *not*
work with an HP-85 (or HP-83). If anybody has an equivalent binary
program for the HP-85, pls send it along.
For more info read the article "Transferring diskette images from an
HP-86/7 to a PC via a serial connection" at
http://www.series80.org/Articles/xfer.html
The HP-86/87 Demo Disc is also available at:
http://www.series80.org/Programs/DEMO87/index.html
(I'll also post a utility for listings and unbundling LIF floppies
on a Unix box in the next couple of days).
**vp
[1] If you use Linux, note, that there is a comprehensive package
for reading LIF floppies, called lifutils, written by Tony Duell.
Unfortunately it does not run under OpenBSD which is the system
I am using.
