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"ODEP" crown macrotech |
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DjLeco 
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Joined: 21 April 2009 Location: Bucharest Status: Offline Points: 817 |
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 Posted: 15 June 2010 at 10:32am |
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Waiting for your reply when all faults have been fixed!
And photos too!
 Cheers!
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I'm A Stupid SMART Romanian...
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kallabungo
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Joined: 12 April 2008 Status: Offline Points: 296 |
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Posted: 08 July 2010 at 4:19pm |
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Well i dont have any photo's im afraid but i have just had confirmation from Lewis that the fault(s) have been fixed and the amp is fully operational once again!
We have 4 more 1850 horns as of this weekend (fingers crossed) Finally we'll have an amp to power them!
Thanks to Lewis for the repair and many thanks to DJ Leco for all your time and advice in helping me sort the faults out.
Stu (Inferior Sounds)
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DjLeco
Young Croc
Joined: 21 April 2009 Location: Bucharest Status: Offline Points: 817 |
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Posted: 08 July 2010 at 4:51pm |
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We wait for some youtube links, with movies from event!
Can you ask Lewis , what was exactly faulty?
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I'm A Stupid SMART Romanian...
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kallabungo
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Joined: 12 April 2008 Status: Offline Points: 296 |
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Posted: 09 July 2010 at 9:57am |
The mosfets on channel 2 as you pictured were found to be faulty and replaced. There was however, another issue that Lewis was unable to find. After channel 2 had been repaired channel 1 ODEP was completely off and IOC light constantly illuminated bright green. By chance Lewis managed to accidentally find the little burnt out resistor, or maybe a capacitor, on part of the ODEP circuitry. He replaced the component and the amp seems to be fully operational once again.
We have a very big gig 31st July and this will definitely test the amps abilities, i'll be sure to take a video for you. I think i should give it a good bench test before i take it out to a gig really, just to be safe.
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DjLeco
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Joined: 21 April 2009 Location: Bucharest Status: Offline Points: 817 |
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Posted: 12 July 2010 at 10:13pm |
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Ok, we wait "the videos"!
Make it on HD camera if you can!
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I'm A Stupid SMART Romanian...
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Ke5lly
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Joined: 27 March 2012 Location: Texas USA Status: Offline Points: 1 |
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Posted: 27 March 2012 at 1:50am |
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Hello
I have 2 crown microtech 5002vz on one the channel 2 is getting hot but working. On the outher one as soon as I power it up the STBY1 LED comes on on both channels and then a few seconds later channel 2 STBY2 LED goes out and channel 1 STBY1 stays on and the OUTPUT MOD FAULT LED comes on. Any help on this would be appreciated. KE5LLY |
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chickenfizz
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Joined: 17 March 2008 Location: United Kingdom Status: Offline Points: 982 |
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Posted: 27 March 2012 at 1:40pm |
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Presumably you are talking about the LEDs on the PCB?
The LEDs on the front panel probably look like this: channel 1 LEDs - ODEP on, IOC off channel 2 LEDs - ODEP off, IOC on It is likely to be at least a shorted output device on CH2 and possibly other damage as a result, get it sent off. Your other one that gets hot (under no load?) could be a bias fault or could be something completely different, again, get it sent off. |
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DjLeco
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Joined: 21 April 2009 Location: Bucharest Status: Offline Points: 817 |
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Posted: 28 March 2012 at 11:57am |
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Check power supply mosfets from VZ circuit, is shorted, suplying permanently the final stage with max tension (170-180Vdc). On the other, you have deja blown(shorted) output devices.
Also before fixing, check VZ stage mosfets, are shorted surely.
Replace NE555 circuit too, and LM339 comparator.
Entire manual service here:
Blown components on VZ stage:
 Edited by DjLeco - 28 March 2012 at 12:29pm |
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I'm A Stupid SMART Romanian...
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gerry_morales
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Joined: 01 February 2015 Location: philippines Status: Offline Points: 7 |
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Posted: 28 May 2015 at 12:58am |
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hi DJLeco,
about vz5002 ioc problem..........do i need to replace also MOC8021 |
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organeu
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Joined: 06 November 2010 Location: France Status: Offline Points: 8 |
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Posted: 15 February 2016 at 3:12pm |
CROWN MACROTECH MA3600VZ 2X1565W/4OHMHELLO, Is this power amp good enough for 2 JBL SRX 718 ? and so sometimes 4 JBL SRX 718 (2 on each side of the stage) linked ? Thanks a lot. The only problem is than this power amp is heavy but I believe very good.
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ychole audio
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Joined: 18 January 2007 Location: United States Status: Offline Points: 625 |
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Posted: 15 February 2016 at 5:06pm |
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Onother query here to our macro amp experts, I got an ioc light on solid green. Any inputs on this where to start troubleshooting?
Edited by ychole audio - 15 February 2016 at 5:06pm |
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I am ZERIEL'S dad!!!
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kedwardsleisure
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Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4949 |
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Posted: 15 February 2016 at 8:05pm |
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IOC light glowing brightly with no audio connected essentially means its in protect. There are further diagnostic lights on the power & main boards which should hint where the protect signal is coming from.
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Kevin
North Staffordshire |
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DjLeco wrote: