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[tigers_gonads]

Sorry Tango, been working and the PM ended up in the spam box 
PM incoming 

[tango]

Replied to
Paid for and waiting delivery
👍

[tango]

Received item last week
Installed on the weekend and running fine
And then yesterday I had the sound cutting out intermittently

The unit just goes silent
No volume at all
Cd radio or Nav
Cd seems to run and play as it shows on the screen but no sound
Same with radio I can select channel etc but no sound
Is there a wire that tells the unit to mute apart from the telephone one
As that’s already been checked

[VXL V6]

No, not really, although CAN is able to mute the HU for Telematics input.

Was the new Head Unit Bose enabled?

[tango]

It’s not Bose enabled
And I’m not running a amp
The sound cuts off intermittently
If the black mute wire is grounded then it shows external audio on the display
It’s not that

I’ve tried the Balance and fader controls to run each speaker at a time And also disconnected all speakers to run one channel at time To eliminate a bad speaker
It’s not making any difference
It happens at different volume levels
When driving it’ll cut in and it can’t tell if it happens when going over a bump as this would suggest a bad connection somewhere

I’ve got so many issues at the same time lol
I’m having proper fun with this car

[VXL V6]

I'm confused, have you removed the Bose amp and Speakers from your Elite then?

[tango]

Bose amp was removed
And after market speakers were installed

[VXL V6]

Ah OK, I'm with you now.

Could be a failing amp stage in the head unit I guess.

Sometimes the ISO loom can chaff on the H/U cage intermittently when it doesn't sit correctly behind it.

Don't suppose the car has Trafficmaster or just a Trafficmaster loom installed?

[tango]

No traffic master installed
Not sure about the wiring
I’ve checked all the wiring
Wiggled and giggled to no effect
Sound will come and go randomly

[VXL V6]

Is the air pipe in the back of the head unit aperture still connected and blowing air at the back of the unit? I had an NCDC retrofitted in a previous Omega that would freeze the NAV function when it got hot, solved by opening up the air pipe that had been crushed.

[tango]

I will check that
But I’m having this issue whilst the unit is still cold, Surely it would take time to warm up after a while of play

[VXL V6]

Would have thought so, Nb. there is also a fan on the L/H upper chassis of the HU as well. Just trying to think of possibilities.....

Not sure which board the inbuilt amp is on, if its the rear one you can swap that between units but not sure if Bose/Non-Bose config is held on there.

[tigers_gonads]

Just a thought.........
Will the head unit amp cut out the sound if you short the positive and negative speaker wires out on one of the channels out ?
If you have removed various components, maybe you have a intermittent short on the speaker wires somewhere ?

[tango]

I’ve already check this by disconnecting all channels and connecting one at a time

[TheBoy]

There is a telemute line, but will cause "External Audio" to appear on display. As VXL V6 says, there is a CAN based mute for telematics, but that brings up "Phone" on the display from memory.


So sounds the output stage is shutting down.  Check the 2 screws that go through the top of the case into the small heatsink are in place - the case acts as part of the heatsink.


If the output stage is trash, but your old output stage from previous NCDC works, you can always swap the rear board (only) over. Don't swap front board or CDC, else you will bugger up the pairing.