Question about Audio Players & Recorders
Concerning the Boston Suwoofer not powering up, I just had the same problem and this is what I did to fix it.
1. Uplug the unit
2. Remove the outer screws and remove the board unit
3. Unplug the board (Power Board) that is connected to the switch and unplug the two connectors that connect to the amp.
4. Remove the 4 screws(on the front panel side not the nuts on the board)
5. Look at the switching diode (labeled #1) directly beside the transistor cooling plate, if the board around this transistor is burnt there is a good chance that the diode is fried. If you do not trust your eye you can measure across the positive and negitave of the diode with your multi-meter (on the diode check setting) and you should read ~.565 and you should read infinity if you swap the leads. If the diode reads ~.667 and you can read this taken across any polarity the switching diode is fried.
6. If the diode is fried go to radio shack
7. Purchase a 1N914-1N4148 Switching Diode. Cost about $1.36.
8. Go home de-solder the fried diode.
9. Solder in the new Diode. ***Pay ATTENTION to put the new diode in the exact way the old one came out!!*** If you do not get the polarity correct the diode will not work properly and your unit will not power up. Also, it is a good idea to leave ~ 1/8" between the diode and the board, this will help disipate heat the cause of the problem to begin with.
10. Place power Board back on the backside of the front panel
11. Install 4 screws(on the front panel side not the nuts on the board)
12. Plug the board (Power Board) that is connected to the switch and plug the two connectors that connect to the amp.
13. Place the panel back onto the subwoofer and secure it with the screws. You can use a screw gun for this just make sure to turn you tourqe level back to ~3 otherwise you could strip out the screw and or the particle board.
14. Plug it in and your rolling.
I hope I am not to late and this works out for you. I just fixed mine tonight.
Posted on Jan 08, 2012
You can remove the screw near the volume knob and the screw near the on/off switch - then slide out the amp remove the black and white wire - then check the fuse - if its blown look for we repair amps - ebay - if its good then it probably still needs work - it should turn red when plugged in and no signal and green when signal is present - which means amp is on.
Posted on Nov 03, 2011
Tips for a great answer:
Aug 06, 2014 | Boston Acoustics Audio Players & Recorders
Jul 13, 2013 | Audio Players & Recorders
Jun 18, 2013 | JVC SP-PW100 Subwoofer
Dec 03, 2012 | Audio Players & Recorders
Sep 01, 2012 | 1996 Lincoln Town Car
Jul 03, 2017 | Cars & Trucks
Dec 27, 2017 | 1995 Honda Civic
Feb 05, 2010 | Altec Lansing Multimedia Computer Speakers
11,619 people viewed this question
Usually answered in minutes!