Mazda Bose System "Noise"
IMPORTANT - This instruction is relevant for the complete set with BOSE!
Issue 1 "No sound"
The regular radio itself controls the amplifier, gives it a command when to turn on. The Teyes radio does not do this by default, the amplifier does not work and therefore there is no sound.
The solution is as follows:
The blue wire from the A port "amp-con"
And we join it with this wire or the Blue Amp wire
Issue 2 "high volume and interference"
The standard radio for Bose head unit does not have its own amplifier, so it delivers sound without amplification to the standard amplifier, and that already amplified sound is given to the speakers.
In the case of Teyes (and almost all radios have their own amplifier), we have an amplified sound from the radio, which is also amplified by an amplifier. The consequences are different, for example, from not serious:
- noise at minimum volume
- increased volume, at the minimum volume the sound is very loud (solved by the settings the output power lower on the radio (minimum pre-amplification and equalizer at minimum) but the noise remains
https://www.teyes.com.au/pages/how-to-set-the-output-power?_pos=1&_sid=d96a1a5b8&_ss=r
If you accidentally turn up the sound, you can burn the standard amplifier
The solution is also quite simple:
From the radio there is a special output for the amplifier, (the L port 5.1 Harness) from there the signal comes out without amplification as they are pre-out RCA. The kit comes with an adapter for this case
We need to connect it to the radio. Cut off the sound outputs from the main G plug of the unit, a total of 8 wires (4 channels, each + and -)
And connect them to RCA connectors
Here's the pinout of the main chip of the radio:
To connect
RR with G14 and G16
RL with G10 and G12
FR with G9 and G11
FL with G13 and G15
How to connect
There are two options:
1 - From then L port of the unit, solder the ends and connect them to the output under the amplifier
2 - Cut off the RCA and just connect the wires from the G port, cutting off the speaker outputs from there
For the connector from the radio Minus on the wires that have a black stripe, for rca minus just a black wire
After the work done, the noise goes away and the volume returns to normal!