Good chance a shorted diode on the other end of the pcb where the big wire harness connects. Four little 1N4001 diodes (D10 through D13 I think) and Two diode bridges (the black sqares standing off the board on four legs).
You need a meter to check them. Any one of those six could be the problem. If it's one on the 1N4001's then you should replace them all and upgrade to 1N4007's.
I just upgraded some some parts on my ADA880 sub pcb today. Love the sound of this system no longer use it with my computer - have it hooked up to a DVD player with digital out. So basic but so awesome.
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I have a suggestion that you can try. If the unit is no longer turning on and you're sure the electrical outlet is good (by plugging in another device) and the hand-held control panel is on, as well as the switch at the base of the subwoofer, then try replacing the fuse. The subwoofer on this model has a fuse near where the power cord enters the subwoofer. There is a slotted screwdriver slot on the fuse cover. Using a flat-head screwdriver (or your thumbnail), turn the cover about a 1/4 to a 1/2 a turn and the fuse should pop out. Keep the cover. Replace the fuse with a 4 amp, 125V (or higher) fuse that is a slow-blow fuse. There are fast blow (or fast acting) and slow blow (or slow acting) fuses. You can't replace one for the other. You should be able to find a fuse at Radio Shack. If a new fuse doesn't get your system working again, then something else is broken. Good luck.
If your subwoofer does not work on your altec lansing speakers, more than likely you blew the subwoofer amplifier board. I have an ADA-885 system and bought it brand new back in November 2000 and has been flawlessly operating great up until this past month when my subwoofer went out but my "satellite" speakers kept working. After disassembling the subwoofer box I first noticed that the subwoofer amplifier board is seperate from the rest of the grouped boards for the dolby and satellite speakers. The subwoofer box is designed to use the air from the subwoofer to actually cool the amplifier boards inside the unit, great feature until your subwoofer goes out, that is when your main amp will more than likely fail soon after the sub amp fails, as it uses the air from the subwoofer to keep the amps cool. I know this might be an older post but hopefully I can put it in the right category to hopefully be able to help someone out in the future.
You can test the ohms of the speaker with a multi tester. It's a dual voice coil speaker, 6 ohms each.
Well my system is broke and needs another subwoofer amplifier board so if anybody reads this and has this subwoofer, I need my sub amp fixed ! or if you have the subwoofer unit maybe and nothing else to go with it but the subwoofer lights up, give me a jingle, I'd buy it from you !!
Hi there bud, this could also mean that something in the Subwoofer has blown or shorted, the best thing to do is too take it back too the shop where you bought it and ask them too replace it .its not worth opening it up yourself and losing the warranty... Happy new year . Hope you come right :)
HI, maybe theres been a bit of confusion but your Altec Lansing ADA745 speakers shouldn't need any drivers. Its kind of similar to you plugging in a pair of headphones into your cumputer, they should work just fine. Are you not getting any sound? Post the details of your PC (is it a dell?) model number etc... and describe your problem You probably need audio drivers for your audio device(inside your pc on your motherboard),