Re: CM8833-II / CM11342/05G Monitor

[Drew <GoggleDrew@gmail.com>]

On Nov 15, 2:05 am, "Michael J. Mahon" <mjma...@aol.com> wrote:
> Drew wrote:
> > On Nov 14, 7:45 am, Drew <GoggleD...@gmail.com> wrote:
> >> On 14 Nov, 06:12, Polymorph <polymorp...@hotmail.com> wrote:
>
> >>> On Nov 14, 11:38 am, Drew <GoggleD...@gmail.com> wrote:
> >>>> Hi,
> >>>> After a bit of help again :-). I managed to pick up a Philips CM8833-
> >>>> II monitor today and was wondering if i needed to do anything special
> >>>> to get it to work? I did do a search of the forums but didn't find
> >>>> anything specific. Looking at the pinouts it would seem I should be
> >>>> able to use the cable I have for my Commodore 1084s, but when i use it
> >>>> the picture just rolls i.e not in sync.
> >>>> The cable I made for the 1084s is cabled as per the faq and i get a
> >>>> stable picture on my 1084s monitor...though red isnt very good.
> >>>> The only information i have found on the pinouts for the philips
> >>>> monitor are:-
> >>>> 1,2 - Ground
> >>>> 3 - Red
> >>>> 4 - Greem
> >>>> 5 - Blue
> >>>> 7 - Status RGB
> >>>> Any suggestions?
> >>>> Many thanks
> >>>> Andrew
> >>> It may be like the 1084S monitor that I have hooked up to my daughters
> >>> IIgs in that it requires a small value resistor between composite
> >>> synch and ground.
> >>> I refer you to the relevent thread here:http://groups.google.com.au/group/comp.sys.apple2/browse_frm/thread/7...
> >>> Have a read through that and see if it sounds familiar. The solution
> >>> presented within that thread did fix the problem for me - the monitor
> >>> in question has now been in use for nearly a year.
> >>> If you get stuck or need pics of what I did, let me know and I'll see
> >>> what I can do.
> >>> Cheers,
> >>> Mike
> >> Hi Thanks for the comments guys. I don't have a resistor to hand, but
> >> will try some of the comments about connecting the composite sync to H
> >> and V sync and possibly try sync on green.
>
> >> Cheers
> >> Andrew
>
> > Hi,
>
> > Well i got the monitor to sync putting the composite sync onto pin 2.
> > Though was a bit disappointed with the picture as wasn't as clear/good
> > as the 1084s-d2 monitor I have (well ignoreing the weak red
> > colour ;-)). Had thought they were based on similar tubes....getting a
> > nice collection of monitors though ;-)
>
> It's almost certainly not the tube, but the adjustments or the
> internal "matrix" resistors used to set the color mixes.
>
> The issue of clarity or resolution is another matter.  That can be
> limited by the dot pitch of the tube, by the bandwidth of the video
> amplifiers, or by focus adjustments.
>
> -michael
>
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Thanks for the info. The monitor is a 14 inch screen where the 1084s-
d2 is a 13 inch so the dot pitch could make it look slightly worse
picture. Interestingly the CM8833-ii monitor will sync on Pin2
(Ground), and Pins 8 and 9 (V and H Sync) and also pin 7 using the
composite sync from the GS.

Thanks
Andrew