...does such a manual exist at all? I have some N4000A monitors in need of adjustment or (hopefully) simple repair.
-- Michael
Hello Cuby:
https://www.arctic.de/us/products/cooling/case-fans/ Page 42 and 43 have he;ped me a lot!
Does any one know how to Adjust the monitor stand..... When you remove the magnesium stand you have to loosen the screws on the axle to get at the 4 screws that mount to the CRT Body from underneath . Upon Reassembly what is the trick or tip to reversing the process at tightening the center axle screws so the inner workings properly rengage the mecanisms so you can control the front back tilt of the monitor verse uncontrolled flip flopping like it has a broken neck . I'm positiive I'm not alone in having had this happen and I think it differs from the earlier 4000 model.
Thanks a lot Rob – I think you intended to link to this document instead:
http://www.nextcomputers.org/NeXTfiles/Docs/Hardware/NeXTServiceManualPages1-160_OCR.pdfMore than twelve years after that post of mine, the monitors are still in storage and not adjusted/repaired, but I might find some time to do this in the next months (and will probably have to do a lot of recapping on my NeXTs which have been in storage for three years now).
I haven't had to adjust the monitor stand so far, but I'll let you know which problems I encounter...
Hello Cuby: Better late than never , I actually did a search and I saw no one responded to you and I had uploaded the manuals awhile back . you are correct , that link for fans was another post and I had 2 responses going at crossed them up lol..... I made a video here of the 4000A monitor adjusting ..
https://youtu.be/jiH5jLjcqSY , I'll fix the link in my response. Keep me in the loop on your monitors!
Plain N4000 related question.
I have one of these nice displays, with the impossibly heavy steel stand.
When it arrived it was quite dim (my assumption was because of the aging phosphors), but after regular recapping and image adjustment according to the above mentioned procedure, it would run acceptably bright for casual use.
One thing that I observed is that the brightness level increases a lot after some time the display is on.
When I start the machine (cube 030), with the default brightness level the picture is dim, I need to boost it all the way up in order to make it usable.
Then what happens is that if I let it on without using it, the software dimmer kicks in (after 5 mins only) and the display goes black.
I assume in these conditions there's no electron beam activity on the phosphors, it should be the purpose of a CRT screen saver.
When I wake it up again it's visibly brighter.
And the longer it remains on (always dimmed), the brighter it gets.
I once forgot the cube on the whole night, the next day when I woke the display up, it was _alarmingly_ bright.
Now, I'm not sufficiently expert with this type of stuff, but I'd be very curious to know if the fact that apparently brightness drifts up with the time depends on the phosphors or on some piece of electronics which adjusts over time and (reasonably) temperature. In the former case there would be nothing one could do for making it brighter from the start, in the latter maybe there would be the possibility to replace some component with more modern ones...
Any comment and idea is more than welcome!
I've had the "gets brighter after warms up" issue with a bunch of N4000As, sometime to the point they're unusable...
Quote from: paolo.bertolo on April 23, 2022, 06:18:50 PMPlain N4000 related question.
I have one of these nice displays, with the impossibly heavy steel stand.
When it arrived it was quite dim In the former case there would be nothing one could do for making it brighter from the start, in the latter maybe there would be the possibility to replace some component with more modern ones...
Any comment and idea is more than welcome!
Did you happen to see the NeXT 4000 Factory manual I purchased and uploaded for the community :)
http://www.nextcomputers.org/NeXTfiles/Docs/Hardware/Schematics/NeXT4000MonitorFactoryManual/ , it is different from the above manual :) I also have brightened up monitors by using a mono Turbo with 128Mb of ram , it is weird but it really does give them an extra boost lol of brightness .