Allen & Heath GL4000 meter pod issue
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From: Eeyore on 14 Sep 2008 04:04 Greg Cameron wrote: > I have a GL4000-848 with water damage in the meterpod. OMG ! The Midas Venice I'm fixing turns out to have some water damage in the master and groups area. I simply ripped ALL the components out and will do a rebuild. Graham
From: Eeyore on 14 Sep 2008 04:06 Greg Cameron wrote: > 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... I know how you feel. My brain has been like cotton wool the last week or two with the venice experience I mentioned in another post. Bring back card per channel build. Graham
From: Eeyore on 14 Sep 2008 04:09 Rupert wrote: > 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 Where are you Rupert ? A&H can be very helpful. if you ask IME. Graham
From: Greg Cameron on 14 Sep 2008 10:14 On Sep 14, 1:09 am, Eeyore <rabbitsfriendsandrelati...(a)hotmail.com> wrote: > Rupert wrote: > > 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 > > Where are you Rupert ? A&H can be very helpful. if you ask IME. > > Graham Actually Rupert is someone I work with and I posted on his machine, hence his header in the post. I'm in Northern CA in the US. And yes, A&H is very helpful. I've had direct contact from time to time with Carey Davies the designer in the past even. Great guy. But is the weekend and I wanted to get a head start on dismantling this beast since A&H is closed. Carey is probably at IBC as well or he would have answered my post on the ProSoundWeb LAB. Greg
From: Greg Cameron on 14 Sep 2008 21:14
On Sep 13, 10:36 pm, Greg Cameron <cameronproau...(a)linkline.com> wrote: > 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 Well, I was finally able to remove the Perspex strip. Up-ending the console didn't quite to do the trick even with WD40. The key was to lay the board down on a level flat surface and carefully remove both side plates so that the Perspex strip could be coaxed out with a rubber mallet on one end whilst pulling on the other. Care must be taken in this state to not flex the frame too much. Here are some pics of what I found inside: http://www.cameronproaudio.com/gl4000meterpod/ Not pretty. Amazingly the meters still lit up, though the needles were completely frozen and the driver circuits were toast. All the caps had tons of oxides oozing from them, some falling off. The PCB's were a lovely rust color on the face instead of tan/yellow. I'd estimate that the meter pod must have been full of water for several months. It acts like fairly water tight trough when the mixer is stored in it's ATA case so the back end it down. Thankfully the rest of the console was relatively unscathed. Hopefully A&H still has inventory on the PCB assembly. Thanks for the help Phil. Greg |