To answer this one, we'll need a lot more information. The following
1. Verify your cable. There's no way to post a picture so we'll try this in text. Looking at the 5-pin DIN (called P1) with the pins to the top, number them 1 through 5 from left to right (regardless of how they may be numbered on a connector as it is unmarked on the cable). Looking at the 8-pin mini DIN (called P2) with the key at the top, number the top row 1 through 3 (left to right in all cases), the middle row 4 through 6 (pin 6 will be the one separated by a gap from the other two), number the bottom row 7 and 8.
Now, make sure that continuity exists. This is how my cable was wired as follows: P1-1 to P2-7, P1-2 to P2-8, P1-3 and P1-4 to P2-6, P1-5 to P2-1. If you do not show that each wire is good, then you either have a damaged cable or audio is not being output by the Bose control unit or your system uses a different cable wiring, which means that you will need to verify that your cable connects each 5 pin DIN to some on the 8 pin mini DIN
2. Make sure that a headphone is not inserted in the headphone jack on the side. If it is, then sound in not connected to the rear ports. It may sound silly, but someone may have connected headphones and nobody realized that they're still connected.
3. Do you have an oscilloscope? If so, then you'll need to insert wires into the 8-pin mini DIN connector for the zone you're using. Using the pinouts from step one for the cable connector will create a mirror at the Bose jack as follows, left to right, top to bottom 3, 2, 1 - 6, (gap) 5, 4 - 8, 7.
Audio comes out at pins 7 and 8. So connect your scope at those points and ground the probe by clipping it to one the RCA shields. Turn the unit on and make sure that you have a source producing signal, such as a disc or a radio station and see if you see signal. The output at these pins appears rather low, so you set your scope sensitive enough.
My Bose produced audio, but also clicking at an increasing frequency and amplitude as the unit heated up, that results in a lot of noise. I verified the wiring and output with this method.
Feb 18, 2011 |
Bose Lifestyle 20 System