13 Feb
2006
13 Feb
'06
1:39 p.m.
On Mon, 13 Feb 2006, a.carlini at ntlworld.com wrote:
John C. Ellingboe wrote:
That jumper pack is in place and I've only removed it once (with power
off).
--
David Griffith
dgriffi at cs.csubak.edu
Check the composite video out at the RCA jack on
the front panel.
The same signals drive two buffer ICs, the composite comes through
U22 and the internal CRT drive comes through u7. There needs to be a
jumper plug on the external CRT edge connector, beside the RCA jack,
in case yours is missing. That jumpers the CRT drive signals back
into the internal monitor.
I'm sure I've read that that jumper plug on the Osborne
(and hence possibly on the Osborne Executive) should only
be inserted or removed with the machine powered off.