Some time ago I got Roland VS-1880. Great stuff, but had a problem with the faders in the mixer section. Some faders did not work at all, some other worked in a strange and misterious ways. Namely, fader 3 did not work at all, 5 worked sometimes, 7/8 at 127 rise level of channel 3 to 16, 9/10 rise level of channel 3 to 105, 15/16 at 127 rise level of Master channel to 20, 17/18 at 127 rise level of channel 3 to 100, and Master fader did not work at all. I had no time to look into it until lately. Here is the brief account on how I tackled the issue.
Best way to test faders on VS-1880 is to enter the diagnostic mode. To do so, press down Status + Track buttons on channel 5 while powering the unit. To select fader test use page down button (F2) to move down in menu to Faders. Then move faders, full range up and down, one by one. Every fader that passed will have number displayed in inverse.
Once confirmed that have indeed problem with sliders, and it is not because of messed up settings, I had to dissassemble the whole thing.
Word of caution here – disassembly of VS-1880 to replace faders is a major PITA, so unless you are totally desperate (as I was), or you really know what you are doing – better give it to Roland service to deal with it.
To get to faders you need to literally tear down everything. Here is little, sparsely illustrated step by step:
1. Remove all knobs and encoder dial, except transport buttons.
Peel off gently left top panel (I removed both because was not sure if there are any extra mounting screws under). When removed stick some soft plastic bag on the sticky side of the panel to aviod contamination, then store it safely aside. As Chris Sherwin pointed out peeling off the top panel is unnecessary. I stand corrected.
You can see left and right top panel removed, while it is only necessary to remove left top panel. Notice screws.
Unscrew eight flat-head screws as marked on the image above. Yes, Marco got that right, without point nr 2, number 3 does not make sense anymore.
4. Flip the unit up side down, and remove all screws from the bottom
5. Remove three marked screws from the back of the unit.
Do not remove any screws except those marked up.
6. Disconnect four blue ribbon connectors from Main PCB . Do not disconnect the wide one (to IDE drive).
Markings show quite exact location of screws that need to be removed
7. Remove all fourteen screws as indicated on the image above. Also remove Air Guide (metal profile between PSU and main PCB). Thanks to that you will be able to remove all necessary elements at once as shown on the image below.
Rear panel + main PCB + drive + PSU assembly together
8. Now, once we have exposed sub-chassis, we can remove all screws holding it.
Sub chassis of VS-1880
9. Next remove sub-chassis, to get access to the Panel Board.
VS-1880 Panel Board exposed.
10. Once the Panel Board is exposed – we can remove it. In my case there was only two screws holding the Panel Board.
VS-1880 Panel Board
11. Panel Board at last. Finally we can take a look at faders.
End of Part 1