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Author Topic: Loud static in booth monitor Jim Ziegler Jedi Master Film Handler Posts: 753 From: West Hollywood, CA Registered: Jul 99 posted 01-22-2005 12:38 AM                     One of our MS-100 monitors emits very loud static, regardless of the volume setting. When we turn it up, we can also hear the signal from the amps, but, the only way to make the static stop is to turn it off. Does anyone have any idea what may be causing this? The static is also present in a set of headphones when we plug them into the headphone jack.  |  IP: Logged Aaron Sisemore Flaming Ribs beat Reeses Peanut Butter Cups any day! Posts: 3061 From: Rockwall TX USA Registered: Sep 1999 posted 01-22-2005 12:56 AM                     Easy (but unorthodox) fix: Give the monitor a hard smack- the noise should change or disappear entirely. There is likely something loose or corroded internally causing the static, I have had the same thing happen to MS100 monitors and giving them a good smack seemed to cure it. -Aaron  |  IP: Logged Dominic Espinosa Phenomenal Film Handler Posts: 1172 From: Boulder Creek, CA. Registered: Jan 2004 posted 01-22-2005 03:48 AM                     quote: Aaron Sisemore giving them a good smack seemed to cure it. Man am I glad he doesn't take that approach with the projection staff... Just for curriosity sake...Would it be likely something loose on the input or in the monitors volume control or something else entirely?  |  IP: Logged Jim Ziegler Jedi Master Film Handler Posts: 753 From: West Hollywood, CA Registered: Jul 99 posted 01-22-2005 04:50 AM                     I took the top off and re-seated all the connections and still nothing.. I will check them all again tomorrow. All of them were not fully seated, which I found odd...  |  IP: Logged Christian Volpi Master Film Handler Posts: 349 From: Arlington, NE Registered: Apr 2004 posted 01-22-2005 08:28 AM                        quote: Aaron Sisemore Give the monitor a hard smack Glad to hear I'm not the only one that did this. I used to have an ultra stereo monitor that I must have smacked a thousand times. Heck, it worked.  |  IP: Logged John Walsh Film God Posts: 2490 From: Connecticut, USA, Earth, Milky Way Registered: Oct 1999 posted 01-22-2005 12:49 PM                     This is a problem with older Component Eng MS-100's. The 20 pin (or so) connector to the amplifier module gets tarnished, resulting in a poor connection. The company knows about it. When I mentioned it to them (about two years ago) the fellow I talked to sent me a new module at no charge, but you must return the old one.  |  IP: Logged Jim Ziegler Jedi Master Film Handler Posts: 753 From: West Hollywood, CA Registered: Jul 99 posted 01-22-2005 01:47 PM                     Can these contacts be cleaned?  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 01-22-2005 02:02 PM                     If you do clean them use Caig Laboratories De-Oxide or Pro Gold contact cleaners. A tiny bit of that stuff on them and they will probably never give trouble again. This is as good as contact cleaners get! Caig Labs Web Site Mark  |  IP: Logged Jim Ziegler Jedi Master Film Handler Posts: 753 From: West Hollywood, CA Registered: Jul 99 posted 01-22-2005 05:00 PM                     The best contact cleaner I could find here in Selma was Radio Shack. However, that did the trick! Thanks for all the help! I will check out that other brand and try to get some in here for the next time I have an issue.  |  IP: Logged Paul Vollmers Expert Film Handler Posts: 161 From: Sister Lakes, MI, USA Registered: Jul 2001 posted 01-22-2005 05:20 PM                     I used some Radio Shack spray contact cleaner on a volume knob rotated it several times and bingo ..........no more static. Give it a try.  |  IP: Logged Chris Boland Film Handler Posts: 6 From: Kingston, On Canada Registered: Jan 2006 posted 01-06-2006 12:44 AM                     quote: John Walsh This is a problem with older Component Eng MS-100's. The 20 pin (or so) connector to the amplifier module gets tarnished, resulting in a poor connection. The company knows about it. When I mentioned it to them (about two years ago) the fellow I talked to sent me a new module at no charge, but you must return the old one. As this is my first post, I should say I don't mean to bring back old threads, but I also didn't want to start a new one. At the theatre I work in we have several MS-100s with this problem. The last time we had a technician in from Toronto that knew how to fix it (I believe it was Rick Long) was almost 2 years ago. My question. The connector board to the amplifier, is this the panel located on the back of the unit where the various channels from the Processor/Power Amps are connected? Or is there a terminal block inside the unit that is cleaned?  |  IP: Logged Dominic Espinosa Phenomenal Film Handler Posts: 1172 From: Boulder Creek, CA. Registered: Jan 2004 posted 01-06-2006 04:09 AM                     quote: Chris Boland As this is my first post, I should say I don't mean to bring back old threads, but I also didn't want to start a new one. Fear not for bring an old thread up is encouraged as opposed to having extra threads about the same topic. Oh and welcome to Film-Tech! Sweet...I got to welcome somebody... Anyhow, back to the topic. I'm pretty sure it's the connector on the rear of the unit. I'm sure someone will be along shortly to correct me if I'm wrong though G'luck.  |  IP: Logged John Walsh Film God Posts: 2490 From: Connecticut, USA, Earth, Milky Way Registered: Oct 1999 posted 01-06-2006 12:00 PM                     The connector for the amplifier module is inside. You'll have to actualy remove the MS100 to get at it. That rear PC board where the audio connectors go can usually be removed and unplugged, (there are two plugs on the back) saving the time of disconnecting all audio leads. However, on some units, they used ty-raps to hold wires out of the way, and sometimes those ty-raps were pulled a little too tight to allow you to get the board out far enough to unplug it.  |  IP: Logged Chris Boland Film Handler Posts: 6 From: Kingston, On Canada Registered: Jan 2006 posted 01-06-2006 02:15 PM                     Thanks for the welcome Dominic! John, is it relatively easy to get at the connector? Just wondering if this is a 20 minute or a 2 hour job. Thanks!  |  IP: Logged Brian Long Film Handler Posts: 7 From: Seattle, WA., USA Registered: Jan 2005 posted 01-06-2006 03:36 PM                     There was an issue with a batch of MS-100's where the connector that the STK4024/6 power amp module plugged into was changed. The pins on the amp module didn't seat into the connector as far as they needed to. This connection is what causes the static. Unfortunately, the static problem didn't show up until the units had been in operation for a while. We have remedied the problem but, in the mean time, fixing the units that are in the field has been ongoing. The fix can either be done in the booth or you can send the main board with amp module in for us to fix. The fix entails removing the top cover and then the main board. The 15 pin surface mounted connector that the amp module plugs into needs to be de-soldered and replaced with a new one. Please call our office or e-mail me so we can either send out a new connector or make arrangements for you to send the board in for us to fix. Brian Long  |  IP: Logged

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