Michael wrote:
Is the 7603 supposed to light up the buttons on the plug-ins? Some of my
plug ins definitely have lights installed in the push switch assemblies,
but
no light emerges.
...I remember reading somewhere that the 7000 plugins were designed to be
lit, but the poor reliability of the bulbs and the difficulty in changing
them caused Tek a rethink and the idea was scrapped.
Dunno if this is correct. (mine don't light either).
:-(
Michael
I don't think that is quite correct. I can't argue with the reliability or
difficulty in changing them, but I think later mainframes like the 7904A had
lit plugin lights. The reason the 7603 does not is because the power supply
can't supply enough power to light them all and still regulate properly down to
low line voltage. The 040-0686-01 kit that we have been discussing provides
plugin lamp power in the 7603 and other 7600 series mainframes but warns about
low line voltage regulation and also mainfram ambient temperature derating.
So you CAN get the 7603 to provide plugin lamp power, with some limitations . .
.
Stan
w7ni@...
