6 May
2013
6 May
'13
3:09 p.m.
Why did you replace the CRT? I notice that your final
(?) photo has a
caption of the form 'enjoying the green screen', but I thought all M4s
had a green phosphor CRT. Well, M3s that have been upgraded don't I guess.
No, only the later M4s had green screens. Earlier ones did not. My B/W
one had some screen burn. There was a faint pattern etched into the
screen. In the past life the unit must have been on for a long time
showing just that one screen image.
I've worked on Macs in the past and usually have grounded the tube first.
Someone told me that if the machine (at least this TRS-80) had been off
for 24 hours then there is little risk of getting a shock, so I didn't
bother grounding first. As it was there was no problem.
Terry (Tez)