25 May
2002
25 May
'02
3:11 p.m.
Hi,
I have powered up my TU78 that I got from Isildur last fall. Given
just the right power plug with 220V it actually powers up and has
a nice sound. I tried to do some stand-alone testing like threading
a tape etc. I am fighting with the automatic threading system. There
is a switch to select Auto and Manual, but in reality a complete
manual threading is not possible at all, i.e. there is no way to
manually see to it the tape gets properly wound on the empty reel.
The automatic threading will suck the tape into all sorts of blind
canals, it's quite funny. Even though I have a TM78 user manual,
the magic of threading isn't described there (guess that's in the
operator's manual?)
The TU78 also has a nice key pad that seems to allow all sorts of
stand-alone testing and diagnosis, but that again is not described
in the TM78 manual. Does anyone of you run a TU78 and could initiate
me into the art of handling one :-)?
I am waiting for my PCM board for the VAX 11/780 before I can
report progress on that end. Will drive to Kansas soon to get
the backplane stuff for the 11/785 boards that I bought last
year.
regards
-Gunther
--
Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org
Medical Information Scientist Regenstrief Institute for Health Care
Adjunct Assistant Professor Indiana University School of Medicine
tel:1(317)630-7960 http://aurora.regenstrief.org
27 May
27 May
9:58 p.m.
--- Gunther Schadow <gunther(a)aurora.regenstrief.org> wrote:
Hi,
...I am fighting with the automatic threading system. There
is a switch to select Auto and Manual, but in reality a complete
manual threading is not possible at all, i.e. there is no way to
manually see to it the tape gets properly wound on the empty reel.
Right... the tape path is inaccessible. "Manual" means that you
manually start the tape into the load process.
The automatic threading will suck the tape into all
sorts of blind
canals, it's quite funny. Even though I have a TM78 user manual,
the magic of threading isn't described there (guess that's in the
operator's manual?)
We used to have one. It was nice when it worked. It sucked when it
didn't. IIRC, "AUTO" requires a certain type of tape reel, the ones
that are somewhat complex, not the simple white strips with the black
latch. There's a small metal pin in the tape path that flips around
during an auto-loading sequence. You place the still-sealed tape on
the hub, then press the load button. The pin flips over, opens the
latch and expands the tape seal into the edge of the tape area. The
air stream comes through perforations in the seal and helps push out
the tape. AFAIK, this sequence only works with the right kind of
tape case.
The TU78 also has a nice key pad that seems to allow
all sorts of
stand-alone testing and diagnosis, but that again is not described
in the TM78 manual. Does anyone of you run a TU78 and could initiate
me into the art of handling one :-)?
We had to get our DEC Field Circus guy to give us a few sequences for
some basic tests. It was > 10 years ago. I do not remember any of them.
-ethan
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