Osborne 1 monitor questions

From: Feldman, Robert <Robert_Feldman_at_jdedwards.com>
Date: Fri Aug 29 08:26:13 2003


What looks like the Osborne 1 video adaptor is available from Alltronics (TTL-Composite video adaptor #92C024, $4.95)


It plugs on the edge connector on the front panel, in place of the shunt that is normally there.

I believe that the only voltage supply for the monitor comes from P9 by way of P5, the edge connector on the front panel.

I once had a 9" Panasonic open frame monitor that I used with my O1. I just wired it to a female edge connector socket that I used in place of the shunt. I also added a 100K pot for brightness control.


-----Original Message-----
From: ghldbrd_at_ccp.com [mailto:ghldbrd_at_ccp.com]
Sent: Thursday, August 28, 2003 2:15 PM
To: cctalk_at_classiccmp.org
Subject: Re: Osborne 1 monitor questions

-----Original Message-----
From: Dave [mailto:dfnr2_at_yahoo.com]
Sent: Thursday, August 28, 2003 2:03 PM
To: cctalk_at_classiccmp.org
Subject: Osborne 1 monitor questions

> Hello,
> Thanks to the help of several of you, I have, after
> reparing the power supply, been able to verify that
> the CPU is running, and using the .PDF service manual,
> am able to get a signal on the video pin (8) after
> replacing the contrast pot. However, the monitor
> still produces no output. I have a couple of
> questions:
> 2) What's the simplest way to use an external monitor
> for testing?

Wasn't there some sort of video adapter that plugged in where the jumper
was on the front panel.. ISTR it was a standard b/w NTSC monitor. One of
the surplus electronics places in CA was selling said item for about $4 or
> 3) Does the monitor use the +12V line on the connector
> from the CPU board for all its power, including the HV
> converter?

I'd have to check the schematic, but it sounds logical (sorry Spock!)
> Thanks,
> David.

Gary Hildebrand
St. Joseph, MO
Received on Fri Aug 29 2003 - 08:26:13 BST

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