Re: Magnavox Professional Monitor

[gospodin@clubi.ie (Vincent Quinn)]

In article <364F4692.45A2B9B1@cyberhighway.net>,
Frank Carney <frankc@cyberhighway.net> wrote:

>I have a Magnavox Professional Monitor that I have succesfully used on a
>Laser 128.  It has a TTL RGB and a standard RCA jack.  It also has an
>Analog RGB.  Does anybody have the pinout for this so I can hook it up
>to the Apple ][gs.
>

If this is the same as the Commodore Amiga and Philips CM 8833/II monitors,
the following cable pinouts work with the GS. Perhaps these should be
included in the FAQ?


a) If your monitor has a 9-pin D analogue input:

GS 15-pin male D plug-------monitor male 9-pin D plug

 2 (red video)--------------3
 3 (composite sync)---------7
 5 (green video)------------4			
 9 (blue video)-------------5
13 (blue ground)------------1

You should perhaps also connect GS pin 13 to monitor pin 2 - but it works
fine connected to pin 1 alone.

For the record, the full signal layout of the monitor 9-pin D is:
1 - gnd; 2 - gnd; 3 - red vid; 4 - green vid; 5 - blue vid; 6 - n/c;
7 - comp sync; 8 - horiz sync; 9 - vert sync; shield - n/c.

If the monitor has the built-in stereo speakers, the audio connection is by
a separate lead - a 3.5 mm stereo jack plug at the IIGS end to the
monitor's two RCA audio inputs.



b) If your monitor has a SCART analogue input:

GS 15-pin male D plug--------monitor SCART 20-pin plug

 2 (red video)---------------15
 3 (composite sync)----------20
 5 (green video)-------------11			
 9 (blue video)---------------7
13 (blue ground)--------------5

If the monitor has the built-in stereo speakers with input via the SCART
(ie, no RCA audio jacks), the connection is:

IIGS end (3.5 mm stereo jack plug)---SCART 20-pin plug

tip (audio L)------------------------2
body (audio R)-----------------------6
shield (audio common)----------------4

However, I've found that the audio signal from the GS sound output jack is
not adequate to drive the speakers (I don't know about a stereo board, I
don't have one).

Vincent Quinn