Testing a 1488 line driver...

[Randy Dawson]

Gene,
You could use one of the MAX232 chips by Maxim (others, such as analog devices make this too)

Pretty cool family of chips - takes a logic level and translates to _+ RS232 levels, using a single 5 or 3.3v supply and a internal charge pump.  Only required external parts are the .1 uf charge pump caps...

Randy

> Date: Wed, 2 Jan 2008 21:48:14 -0800
> From: geneb at deltasoft.com
> To: cctalk at classiccmp.org
> Subject: Re: Testing a 1488 line driver...
> 
> > I didn't check for -12V. I'll do that before I go to the effort of pulling 
> > the chip and replacing it.
> >
> Checked it.  -0.60v  There's a Elpac/TDC CB-3811 DC-DC converter on the 
> board that may have died.  I'll pull the board tomorrow and test right at 
> the legs of the device.  Thanks for questioning whether or not I'd checked 
> the -12v supply!
> 
> Finding a replacement is gonna be a stone b*tch I think. :(
> I may have to go to another DC-DC converter that is near the same size 
> that I can wire in.
> 
> 
> g.
> 
> -- 
> Proud owner of F-15C 80-0007
> http://www.f15sim.com - The only one of its kind.

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