W140 Bose amplifier - capacitors - PeachParts Mercedes-Benz Forum

myarmar · #1 01-06-2003, 09:17 PM

This article I found on the Corvette site has detailed description of the repair of the individual channels of the Bose amplifier.
http://www.zr1netregistry.com/Bose2.pdf
The drawing on the last page almost exactly represents 4 channels out of 7. The other 3 channels are different but I had no problems with them either. I replaced all electrolytic capacitors, 78 total.
My noise problem was intermittent and I have to wait to check my repair. So far amplifier works fine.
Next step is tuner/amplifier BE1532. I have 49 caps on order for it.
Here is one of the old capacitors with leak around the negative lead:

#2 01-10-2003, 08:42 PM

1532 Unit (tuner) should have caps looked at as well! Curious what you found out on yours.

myarmar · #3 01-10-2003, 10:18 PM

I will do it this weekend. Caps were ordered from Digikey and arrived yesterday. The caps in the 1532 tuner are different, not POS Nichicon in the Bose. I can't identify manufacturer: RDE. Also I'm a little concern with 3 caps in the AM module - they are different color - 2 yellow and 1 orange. The rest of the caps are black. Maybe Scott and Cleeve know why?

#4 01-10-2003, 10:23 PM

Contact George at http://www.soundrepair.com/index.htm and ask him, he works on saturday so you can probably get your answer tomm.