My gong is silent.....It's on the todo list.
Just wanted to add some hints to this old thread, unfortunately it is not possible to add directly as the case is closed.
http://www.bimmer.info/forum/showthr...t=gong+speaker
http://www.bimmer.info/forum/showthr...t=gong+speaker
Speaker in the gong has 80 Ohm, and they are not that easy to get.
In case you replace it by an 8 Ohm speaker, you have to install a resistor of 75 Ohm in series. But this reduces the loudness of the speaker.
In case you just install an 8 Ohm speaker without reistor, then you send your chip into Nirwana = dead.
http://img72.imageshack.us/img72/8149/gong004ar4.jpg
http://img502.imageshack.us/img502/8827/gong003vp0.jpg
If someone has a good source for such a small speaker, let us know, because the gong is quite expensive.
Last edited by shogun; 10-31-2006 at 07:29 PM.
My gong is silent.....It's on the todo list.
[1994 530i/5-Speed]
I repaired mine a while ago. I can't remember for sure, but I thought the old speaker was an 8ohm. I replaced it with a slightly smaller 8ohm speaker and it works well. I know that the new and the old speakers are the same resistance rating.
It's a little quieter, but I think its better like that.
I used this one - http://www.jaycar.com.au/productView...=&SUBCATID=621
or this one ( I can't remember the size) -
http://www.jaycar.com.au/productView...=&SUBCATID=621
Last edited by myles; 10-31-2006 at 03:49 PM.
Although most speakers are either 4 or 8 ohms, you can also get 16 ohm speakers (although it might be tricky to get these in the right size). 16 ohms would be truer to the original loudness than 4 or 8 ohms.
As I said the speaker has unusual 80 Ohm, not 8.This info is from the electronic expert of the German 7-Forum.
Mine was definitely not an 80 Ohm. Maybe a different gong.
O.K., here is some more evidence
quote:
Repairing a silent gong...
Hi All,
Well, as I was having the radiator replaced today, I had my mechanic pull the gong out for me at the same time.
So far, I have successfully dismantled the gong, and a quick test with the continuity tester and ohmmeter reveals the speaker itself is dead - no circuit.
It is a 5cm, 0.5w 80ohm. Yes, I though 80ohm was strange too, but there really isn't a '.' between the 8 and the 0...!
A round circuit board carries a single IC (an ELMOS ICR33271E), along with some passive components and a few surface-mounted components on the underside.
Since I do not have a 12v source, I am unable to test the circuit with a replacement speaker right now.
I intend to replace the speaker in the first instance, although who knows what else may have blown?! I figure its worth 99c to try! If I can get a replacement IC, I may change that out too, although my money's on (and hoping) that the speaker itself is the culprit.
When I'm done, I may post the results on here.
Wish me luck!!
Ian
how about 10 8ohm speakers in series
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue
Oh yeah, that might be like a symphony orchester then ;-)