Hello Listers,
last week I acquired what seems to be a Tektronix 4002 terminal - at least that's
what a sticker on the rear of the base says. The front bezel with the type designation was
nowhere to be found - apart from that, the unit looks just like the one at
http://www.science.uva.nl/museum/tek4002a.html
The "screen" part was missing, but we located a display unit (obviously
self-contained - this matches the description above) nearby which has aluminum mounting
rails to fit the screw holes in the base of the terminal. It has a power inlet and a DB-25
connector carrying what I suppose to be "raw" deflection/control signals - this
would match the connectors available at the back of the terminal base, apart from the fact
that the power connector coming from the base is an IEC coupler and the inlet on the back
of the display isn't (has a round PE pin - the P and N blades fit the IEC coupler).
So far I have a few questions about this thing:
-Is the display we found really the one that goes with the base?
-What kind of cable do I need to connect the two?
(
http://www.science.uva.nl/museum/rampspoed.html shows how it looks, but what are the
actual connections - 1:1 or something different? Perhaps even some coax or twisted
pairs?)
-Some of the slots in the backplane of the base unit are unpopulated. Is this normal?
-and last but not least, are there any special pitfalls I should be on the lookout for
when I finally go about powering the thing on? Will it probably need capacitor reforming
beforehand?
Thanks in advance, yours sincerely
Great find! I've been looking for one for many years. I don't have any
docs on this terminal so can't help on the cable.
After you check out the power supply and reform/replace any bad caps,
and power it on, the screen should slowly
turn fully green. Leave it this way for 5 min. or so before you issue
any erase commands (keyboard or program).
This procedure reduces the ion content in the CRT and maximizes the CRT
life. I got this from a Tektronix service manual
for the 611 storage display. It says to do this anytime it's been off
for two weeks or more. I have been following this for 15
years now on my 611 (built in 1971) and it's still working great.
Bob