looking for a service manual for the sonos 4500
Hello,
If there were any documents available, they could be found on the product page, here. Unfortunately, there are no manuals attached to this equipment at this time.
What exactly is your problem? Maybe someone can help if you explain the issue you are having.
Looks like I found one! It's uploaded under the resources tab of the product page, here.
Also, if you ever have any documents you would like to share to MedWrench, feel free to email me directly and I will upload the files for you.