21 Aug
2012
21 Aug
'12
2:07 p.m.
Hi. I've reviewed one VT220, one DEC Letterwriter and my PDP8-E. Status:
- VT220 terminal - dead (in appeareance, the tube).
Very unlikely to be the CRT, unless th glass is obviously broekn. Much
more lilely to be a voltage supply problem, again most likely to be in
the horizontal output stage. I would start by chucking the CRT voltages
- Letterwriter: PS or/and some circuitry,
I think the LA100 printset is on bitsavers. The power supply is a
separate module, and you can check the voltages on the output connector
to see where the problem lies.
-tony