1 Mar
2006
1 Mar
'06
3:12 p.m.
From: "John C. Ellingboe" <john at
guntersville.net>
Chuck Guzis wrote:
Hi John
The point is that it is unlikely that the 18 volts will
go to one of these connectors but the ground lead will
most likely be there and Ohm at zero Ohms between connectors.
The other 18 volt lead will most likely be the positive.
Dwight
On 3/1/2006 at 3:07 PM John C. Ellingboe wrote:
I haven't opened it up yet but there is a 9 pin jack on the
side, maybe a serial port. It also has a modular connector
which may be a modem connection. The other side has a large
connector behind a hinged cover that looks like it may be a bus
connection for expantion or connection to some special
equipment.
John Does anyone have information on the TI Travelmate
LT220/V. A
quick Google didn't turn up anything of value.
I have acquired one with a pile of other items and have no idea
how useful it might be. The power source, 18V DC did not come
with it and there is no indication as to whether the center pin
of the power connector is the positive connection or not.
Any external I/O connectors on it? Things like parallel port connections
will usually have their ground/return pins conected to the - side of the
power supply.
Last resort is popping the box open and checking the ground plane on the
PCB or any of the ICs (if the ground plane is buried) against the
connector.
Cheers,
Chuck