Build Your Own Arcade Controls Forum
Main => Main Forum => Topic started by: Ummon on March 25, 2008, 09:16:20 pm
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I picked up this NEC XM29 presentation monitor at the local university auction for ten bucks. Despite some screen burn in the upper right, the overall picture is pretty good. (The burn-in is weird. When off, it looks like a windows box or something was left on, but when on this spot is actually clear, and the rest of the screen is lightly red-tinged, which is obvious with a white image.)
Anyways, it won't remember screen geometry - even on the desktop. Change modes and it goes back to some default it has for that mode. I grabbed a remote that seemed like it would work, and it does - for about 2/3 of things. The rest it won't adjust and it won't access the service menu. Oh, did you think there were menu buttons on the case? Yeah, that would be great. Not this one. It has a serial port for computer control, but I haven't been able to figure out how to access it. There are two sets of dipswitches (the other multisyncs only have one, and do different things between them), but I have little idea what they might do. (I know number 8 'on' allows the remote to control it.)
There's hardly any info online for this model - it's different than the XM29 Plus and Xtra - but from what I can tell, this is actually a 2950. If anyone has any information on this - manual, dipswitch settings, anything - I'd appreciate it.
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I've got two! I've never seen a service mode on the xm-2950 There are some buttons but not for service mode or adjustments. the serial port actually just for setting video input mode AFAIK, just a logical hi/lo table. mine have it printed on the rear (bottom section) of the monitor. Mine don't remember screen geometry adjustments either. One thing that helps (at least from PC's) is to spoon feed it the signal the way it likes it. I can't remember which one it is, but mine always centered better with when I set either composite or separate sync. I can't remember if it was positive or negative. Once you've figured that one out you should be able to change resolutions, at least from that source. I made a special RGB+ composite sync connection for my XBOX and I always had to adjust it before I played, because I don't know how to correct the signal such a way in circuitry.
If all your dip-switch labels are missing I can post them. innaminnit.
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Yes, could you please?
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DIPSWITCH1
1 Power on mode select1*
2 Power on mode select2*
3 Power on mode select3*
4 3.58/4.43 MHz Trap
5 Audio Mute
6 Narrow Video Bandwidth
7 Ext. Control
8 Wireless Remote
*Power on mode select
1 2 3
Defeat: 0
VID1: 1 0 0
VID2: 1 1 0
RGB1: 1 0 1
RGB2: 1 1 1
DIPSWITCH2
1 Sync control1**
2 Sync control2**
3 Not used
4 Not used
5 Not used
6 Not used
7 Not used
8 Power Management
**Sync control
1 2
AUTO: 0 0
Manual1 (Composite): 0 1
Manual2 (Sync on Green) : 1 0
Ext Control
1 Power
2 Input Select1***
3 Input Select2***
4 Mute Audio
5 Mute Picture
6 Not Used
7 Degausss
8 Not Used
9 Ground
***Ext Control Input Select
1 2
VID1: open open
VID2: gnd open
RGB1: open gnd
RGB2: gnd gnd
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Thank you. How do you have them set?