Mordaunt Short Aviano 9 MS529 digital subwoofer Repair

[DeAsis_David]

Hi,
How are you guys doing? The sub emitting strange noise when on. I opened it and found one resistor and transistor is burned on the daughter board. I’ve search and could not find the schematic diagram online. Any ideas?

thank you.

 

[hayden222]

howdy, it may use the same board as a Mordaunt Short 909 which uses the same 12" driver. Apparently its the same board as an EV sx180. I have attached a link to the schematics at bottom but if you need any pics of mine, let me know. I just picked up one of these Mordaunt Short subs from a garbage tip shop for $10. Opened it up, masssive burn marks underneath apparently from transformer running non-stop... Im hoping to get mine up and running...

https://1drv.ms/f/s!AhEaoM8TIFO4niEpBhk_KlwxRhOZ

from thread;
https://www.diyaudio.com/community/...nts-for-mordaunt-short-ms909w-sub-amp.295727/

 

[hayden222]

image link from same public onedrive folder

https://bn02pap001files.storage.liv...160929_143231.jpg?psid=1&width=406&height=570

 

[sebastienBel]

Hi
electronic diagram for the community
For DeAsis_David Q203 its SC1815 and R202 it's 220ohm

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