How To Repair Bose Amplifier

Articles (electric current)
Forums (current)
- Latest
- Microcontrollers
- Power Electronics
- RF & Wireless
- Sensors & Actuators
- Customs

Bose Car Amplifier Repair?

Discussion in 'Troubleshooting and Repair' started past chopnhack, Mar 21, 2016.

Search Forums
Recent Posts

Roll to continue with content

I had an issue with my motorcar radio not playing whatever music whether CD or FM/AM was selected. I was able to narrow it down to the stock amplifier non working. (I disconnected amp and attached a tiny speaker to the pre-amp feeds and was able to hear music from each channel). I replaced the lacking amp with its equivalent from the junk chiliad, courtesy of E-Bay.
I decided to crack the housing open and encounter if I could figure out what went wrong - purely academic, right?! I hateful we all savour a expert sleuth around here, no?

I found oxidation on what I assume is the power amplifier board past a 14 pivot quad comparator LM2901N - the corrosion was found underneath and what seems to be a burnt out diode?

Should I attempt to replace the diode and IC?

This pict. is direct nether the IC - the 'burnt' diode is top right. It looks like information technology was a red glass barrel type smt diode, similar to the lower ane.

Hither is a complete shot of the 'power' lath

Here is the lath that is attached past those thin wire ribbons - I assume it is the audio processing board, as there are v IC's and there are 5 channels to this system.

A close upward of the above IC is marked Bose.
Hi John
I would have a little clean first with some PCB cleaner. Might not be anything wrong with the IC or diode. Then have a look and replace if you experience it needs it.
Cheers
Adam
Thanks Adam, I did examination the diode that I thought was faulty on the dorsum side, information technology measured the aforementioned as the other diodes nearby, about .five V in one direction. Skilful advice, it may just be the corrosion causing the effect!

Ask a Question

Want to respond to this thread or enquire your own question?
Y'all'll need to choose a username for the site, which merely take a couple of moments (here). After that, you tin post your question and our members will help you out.