29 Aug
2006
29 Aug
'06
4:20 p.m.
Obviously, something is "not quite right".
I'll pull them
apart and see if there's anything "obvious". (maybe fresh batteries
"just in case"...)
There's some problem that the original cells in the computer were 1.35V
mercury cells. The replacements (alkaline cells) are closer to 1.5V. I
know some (all?) PC1211s do odd things if given 4 alkaline cells. A
silicon diode in series with one of the battery conenctions generally
fixes that.
IIRC, one of th TRS-80 sites (http://www.trs80.org/ ???) has a service
manual for the PC1 which is essentially the same machine as the Sharp
PC1211. I don't rememebr seeing a service manual for the printer, though.
-tony