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Class D Switching Power Amplifiers and Power D/A conversion

Mackie SRM450v2 schematic?
Mackie SRM450v2 schematic?
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Old 21st August 2011, 02:18 PM   #21
paqurin is offline paqurin  United States
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Join Date: Oct 2010
Hello^^ I just picked up one of these at a garage sale, and I've been fairly lucky in repairing their other equipment in the past. but alas, a schematic is really needed to do the job. I'm hoping one of you gentlemen would be willing to pass me along the schematic as well. figured I would try here before I go harass mackie.
Thanks so much^^
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Old 21st September 2011, 06:13 PM   #22
TRevMFB is offline TRevMFB
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has anyone had any luck in find a schematic for this speaker? i'm in desperate need of one.
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Old 22nd September 2011, 09:21 PM   #23
xavier25 is offline xavier25
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send me a private message with ur email. I will send you the schematics. Now I need some help I know my problem is resistor number R288 wich in the scematic it say is 100k 1 watt resistor but the on I took out is not even close to what I order online. it looks mor like a 100k 5watts resistor and their hard to find. Please help!Thanks
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Old 31st January 2012, 10:46 AM   #24
Operator is offline Operator  Ukraine
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Location: Kharkiv
email: email address removed please pm to avoid spam - I want to get the scheme srm450v2 with pulsed power supply.
Thanks friend!
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Old 26th September 2012, 04:02 PM   #25
drabara is offline drabara  Belgium
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Location: Geel
Default Part U36

Does someone have the part number for IC U36. The one i have is blown and i cant read the ic type.


Parts list is also welcome, the service manual i got, but U36 has no ic name on it....
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Old 27th September 2012, 04:42 PM   #26
nikula is offline nikula
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Old 30th September 2012, 09:48 PM   #27
kevinkr is offline kevinkr  United States
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Mackie SRM450v2 schematic?
Posting links to copyrighted material that is hosted by sites unauthorized by the copyright holder is a violation of forum policy. Do not post links to electrotanya or other similar free hosting sites here.
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
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Old 11th October 2012, 06:41 PM   #28
drabara is offline drabara  Belgium
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Join Date: Sep 2012
Location: Geel
Default Having trouble fixing it

I replaced the UC3842, the LM339, the 18v zener diodes, R288 and a few other parts, i have a 60 watt lightbulb in serial on the powercord. The resistors in the neigbourhood of R288 heat up within 20 seconds. I think something after the MJE13003 draws to much current. But i can't find out what... Any suggestions ?
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Old 18th January 2014, 01:35 PM   #29
kevvywevvywoo is offline kevvywevvywoo  United Kingdom
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Mackie will send you the schematic for free, but you must email them in the USA.

You will need to fill in a form to promise not to disclose it to anyone else.
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Old 16th January 2015, 08:02 PM   #30
alont01 is offline alont01
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Join Date: Jan 2015
QUOTE=lumanauw;2541050]I got a burnt Mackie SRM450v2. It burnt in the SMPS section, around UC3842, LM339. Many tracks and PCB and SMD components are inrecognizeable.

The unit use switching power supply, a classD for woofer amp, andLM3886 for tweeter amp. Different from old SRM450

Anyone has schematic or service manual for this active speaker?[/QUO busca en este sitio electrotanya hay encuentras el diagrama y es gratis
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