Allen & Heath GL4000 meter pod issue
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From: Greg Cameron on 13 Sep 2008 23:54 I have a GL4000-848 with water damage in the meterpod. The rest of the desk is operating fine. I've opened it up to go through and check everything out, reseat cable, etc. But the innards of the meterpod are a loss with lots of oxidation on the PCB. I was wondering if anyone has had experience getting into the pod for repair/replacement. The service manual doesn't mention anything about the version with the integrated pod at all, only on how to add one to the GL4000 that doesn't come with one standard. The construction is a bit different between the two. As far as I can tell, It looks like I may have to pull out every single channel/master PCB and strip the console down to the frame before I can remove pod and replace the meter PCB. The top and backplane metal plates are screwed to the meter pod casing which is apparently a main portion of the horizontal frame. Does anyone know if that's the case or if there is another path? I'll try contacting A&H after the weekend, but I suspect one or two of you out there have had to at least replace bulbs in one of these things and have some idea how to get inside. Unfortunately the construction of this desk doesn't lend itself to easy removal of all the channel cards in chunks of 8 or in singles from the top like a more expensive model.. They must removed one at a time by removing all the pot nuts and such and pulling the cards out of the bottom. I'm hoping there's another way... Thanks, Greg
From: Phil Allison on 14 Sep 2008 00:26 "Greg Cameron" >I have a GL4000-848 with water damage in the meterpod. The rest of the > desk is operating fine. I've opened it up to go through and check > everything out, reseat cable, etc. But the innards of the meterpod are > a loss with lots of oxidation on the PCB. I was wondering if anyone > has had experience getting into the pod for repair/replacement. ** The GL4000 looks much like a GL3000 in a pic I found on the web. With a GL3000, you remove one of the metal end plates and then slide out the Perspex strip covering all the VUs mounted on their long PCB - which is held in by a number of screws. ...... Phil
From: Rupert on 14 Sep 2008 00:49 On Sep 13, 9:26 pm, "Phil Allison" <philalli...(a)tpg.com.au> wrote: > "Greg Cameron" > > >I have a GL4000-848 with water damage in the meterpod. The rest of the > > desk is operating fine. I've opened it up to go through and check > > everything out, reseat cable, etc. But the innards of the meterpod are > > a loss with lots of oxidation on the PCB. I was wondering if anyone > > has had experience getting into the pod for repair/replacement. > > ** The GL4000 looks much like a GL3000 in a pic I found on the web. > > With a GL3000, you remove one of the metal end plates and then slide out the > Perspex strip covering all the VUs mounted on their long PCB - which is > held in by a number of screws. > > ..... Phil I did try to give that a go, but that strip didn't want to move. Could be because it's a 48 channel desk. The strip is a bit over 6 feet long so there's a lot more friction in the groove to deal with. Did the GL3000 have a one piece side plate that covered/supported the pod and the main cavity, or is a two piece cover? The GL4000 has a single piece side plate for both. I suspect removing the side plate might have allowed the console to flex a bit the way I had it positioned and could have caused the groves to tweak and exert more force on the strip covering the meters. The desk is 170 lbs. and difficult to maneuver. I'll try with the desk laying on it's backplane to see if that does the trick. Thanks for the insight Greg
From: Phil Allison on 14 Sep 2008 01:17 "Rupert". "Phil Allison" "Greg Cameron" > > >I have a GL4000-848 with water damage in the meterpod. The rest of the > > desk is operating fine. I've opened it up to go through and check > > everything out, reseat cable, etc. But the innards of the meterpod are > > a loss with lots of oxidation on the PCB. I was wondering if anyone > > has had experience getting into the pod for repair/replacement. > > ** The GL4000 looks much like a GL3000 in a pic I found on the web. > > With a GL3000, you remove one of the metal end plates and then slide out > the > Perspex strip covering all the VUs mounted on their long PCB - which is > held in by a number of screws. > I did try to give that a go, but that strip didn't want to move. Could be because it's a 48 channel desk. The strip is a bit over 6 feet long so there's a lot more friction in the groove to deal with. ** Try a little spray lube on the groove. Did the GL3000 have a one piece side plate that covered/supported the pod and the main cavity, ** Yep. The GL4000 has a single piece side plate for both. I suspect removing the side plate might have allowed the console to flex a bit the way I had it positioned and could have caused the groves to tweak and exert more force on the strip covering the meters. The desk is 170 lbs. and difficult to maneuver. I'll try with the desk laying on it's backplane to see if that does the trick. ** Just stand the desk on one end. Maybe wiggle it a bit while you yank out the Perspex strip. .... Phil
From: Greg Cameron on 14 Sep 2008 01:36
On Sep 13, 10:17 pm, "Phil Allison" <philalli...(a)tpg.com.au> wrote: > "Rupert". > "Phil Allison" > "Greg Cameron" > > > > > >I have a GL4000-848 with water damage in the meterpod. The rest of the > > > desk is operating fine. I've opened it up to go through and check > > > everything out, reseat cable, etc. But the innards of the meterpod are > > > a loss with lots of oxidation on the PCB. I was wondering if anyone > > > has had experience getting into the pod for repair/replacement. > > > ** The GL4000 looks much like a GL3000 in a pic I found on the web. > > > With a GL3000, you remove one of the metal end plates and then slide out > > the > > Perspex strip covering all the VUs mounted on their long PCB - which is > > held in by a number of screws. > > I did try to give that a go, but that strip didn't want to move. Could > be because it's a 48 channel desk. The strip is a bit over 6 feet long > so there's a lot more friction in the groove to deal with. > > ** Try a little spray lube on the groove. > > Did the > GL3000 have a one piece side plate that covered/supported the pod and > the main cavity, > > ** Yep. > > The GL4000 has a single > piece side plate for both. I suspect removing the side plate might > have allowed the console to flex a bit the way I had it positioned and > could have caused the groves to tweak and exert more force on the > strip covering the meters. The desk is 170 lbs. and difficult to > maneuver. I'll try with the desk laying on it's backplane to see if > that does the trick. > > ** Just stand the desk on one end. > > Maybe wiggle it a bit while you yank out the Perspex strip. > > ... Phil Makes sense upending it to prevent frame torsion. I'll give a squirt of WD40 too. Thanks for the advice. Greg |