TimHD
Well-known member
I acquired these two Apple Workstation/Portrait cards over time and been trying to get one of them working on my Mac IIfx.
Large: gallery_5459_108_320932.jpg
The top one is a 820-5037-B "1987, 88" and the bottom one probably Revision A board "1987". Both have 13W3 connectors for Apple Portrait Displays.
(NB: Rev C, "1987, 88, 89" seems to have the DA15 connector - see http://www.ebay.com.au/itm/Apple-Macintosh-820-5037-C-Workstation-Portrait-Video-Card-/311507706762 for an example).
Apart from noticing the different capacitors in a few places (round silver ones vs square flatter ones here and there) I also noticed that the first one was missing a capacitor at C26 (on right, behind where the 13W3 plug meets the PCB). This seems to explain why this does not work (See a Revision B board, http://www.ebay.co.uk/itm/131618809533 by comparison)
Anyone have any idea what capacitor is needed here and who can fix it?
Secondly, while I have a working Apple Portrait Display, the 13W3 to 13w3 "Sun/Apple" monitor cable I could not make it work. This could be cable related. (While I do have a DA15 to 13W3 cable but I suspect i need a Rev C board for that one to work).
Any thoughts/suggestions welcome from those who have managed to get one of these cards working with a Portrait (or LCD) monitor.
Large: gallery_5459_108_320932.jpg
The top one is a 820-5037-B "1987, 88" and the bottom one probably Revision A board "1987". Both have 13W3 connectors for Apple Portrait Displays.
(NB: Rev C, "1987, 88, 89" seems to have the DA15 connector - see http://www.ebay.com.au/itm/Apple-Macintosh-820-5037-C-Workstation-Portrait-Video-Card-/311507706762 for an example).
Apart from noticing the different capacitors in a few places (round silver ones vs square flatter ones here and there) I also noticed that the first one was missing a capacitor at C26 (on right, behind where the 13W3 plug meets the PCB). This seems to explain why this does not work (See a Revision B board, http://www.ebay.co.uk/itm/131618809533 by comparison)
Anyone have any idea what capacitor is needed here and who can fix it?
Secondly, while I have a working Apple Portrait Display, the 13W3 to 13w3 "Sun/Apple" monitor cable I could not make it work. This could be cable related. (While I do have a DA15 to 13W3 cable but I suspect i need a Rev C board for that one to work).
Any thoughts/suggestions welcome from those who have managed to get one of these cards working with a Portrait (or LCD) monitor.