Harman Kardon electrical diagram

matthew777 · 12-02-2020, 03:24 AM

Hi everyone.

Unfortunately, my amplifier stopped playing. My car is a 2016 BMW 328i - harman kardon + ASD. After connecting, everything works, the amplifier communicates, it can be coded to the car. Unfortunately, it doesn't make any sound. It was also updated to the latest software along with the car. Unsuccessfully. I am looking for a company that can repair it, unfortunately also without success. There are no burnouts on the board. Where to look for the cause? Is anyone able to plant a wiring diagram or a place on the board where to look for damage? Are these power amplifiers?
Thank you for your help.

Encanto · 12-02-2020, 03:55 AM

Can you see the 7-band EQ in the iDrive display?

Quote:

Originally Posted by mateusz

Hi everyone.

Unfortunately, my amplifier stopped playing. My car is a 2016 BMW 328i - harman kardon + ASD. After connecting, everything works, the amplifier communicates, it can be coded to the car. Unfortunately, it doesn't make any sound. It was also updated to the latest software along with the car. Unsuccessfully. I am looking for a company that can repair it, unfortunately also without success. There are no burnouts on the board. Where to look for the cause? Is anyone able to plant a wiring diagram or a place on the board where to look for damage? Are these power amplifiers?
Thank you for your help.

matthew777 · 12-02-2020, 04:13 AM

Quote:

Originally Posted by Encanto

Can you see the 7-band EQ in the iDrive display?

Yes, I can.

Ace320 · 12-02-2020, 01:34 PM

Here you can find wiring diagram for the H/K AMP

EDIT: When you open image, right click on image > Open image in new tab
(This way you will see full size diagram)

View post on imgur.com

matthew777 · 12-02-2020, 02:09 PM

Thank you, it's helpful.

Honestly, I am also looking for wiring diagram on the PCBA board. My guess is it will be hard to find. I have an electronics friend who, unfortunately, is looking in the dark ... Is anybody who repair ampt? What is frequent issue with lack of the sound?

Shonky · 12-03-2020, 01:23 AM

If none of the channels work but it generally communicates with the car and otherwise looks like it works I'd be looking at supply rails to amplifiers for each channel for a start.

Obviously the power supply at least partially works or it wouldn't communicate with the car. If it was a bad channel then the others would work.

Both input supplies work (at the two fuses)? It's possible the 5A fused supply is enough for the communications to work etc, but the 40A fused supply would be needed for the amplifier itself.

Have you read the codes? Maybe you'll get lucky and it will report something?

matthew777 · 12-03-2020, 03:12 AM

Hi,

Both fuses are ok.
Code of error: B7F4E1 with desc: Undervoltage detected.

I will check the rail voltage.

Popell996 · 03-05-2024, 04:01 AM

Thread resurrection!
Did this go anywhere?, I have same code and lack of any sound on daughters 430i convertible.

12-02-2020, 03:24 AM	#1
matthew777 New Member 2 Rep 14 Posts Drives: F36 428i Xdrive Join Date: Feb 2016 Location: Lodz iTrader: (0)	Harman Kardon electrical diagram Hi everyone. Unfortunately, my amplifier stopped playing. My car is a 2016 BMW 328i - harman kardon + ASD. After connecting, everything works, the amplifier communicates, it can be coded to the car. Unfortunately, it doesn't make any sound. It was also updated to the latest software along with the car. Unsuccessfully. I am looking for a company that can repair it, unfortunately also without success. There are no burnouts on the board. Where to look for the cause? Is anyone able to plant a wiring diagram or a place on the board where to look for damage? Are these power amplifiers? Thank you for your help.
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12-02-2020, 01:34 PM	#4
Ace320 Private First Class 128 Rep 163 Posts Drives: F31 M Sport, 6MT, Alpine White Join Date: Jan 2019 Location: Udine, Italy iTrader: (0) Garage List 2013 BMW F31 M Sport [0.00]	Here you can find wiring diagram for the H/K AMP EDIT: When you open image, right click on image > Open image in new tab (This way you will see full size diagram) View post on imgur.com __________________
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12-02-2020, 02:09 PM	#5
matthew777 New Member 2 Rep 14 Posts Drives: F36 428i Xdrive Join Date: Feb 2016 Location: Lodz iTrader: (0)	Thank you, it's helpful. Honestly, I am also looking for wiring diagram on the PCBA board. My guess is it will be hard to find. I have an electronics friend who, unfortunately, is looking in the dark ... Is anybody who repair ampt? What is frequent issue with lack of the sound?
	Appreciate 0 Quote

12-03-2020, 01:23 AM	#6
Shonky Private 17 Rep 84 Posts Drives: F31 320i, E46 M3 Join Date: Jan 2014 Location: Brisbane, Australia iTrader: (0)	If none of the channels work but it generally communicates with the car and otherwise looks like it works I'd be looking at supply rails to amplifiers for each channel for a start. Obviously the power supply at least partially works or it wouldn't communicate with the car. If it was a bad channel then the others would work. Both input supplies work (at the two fuses)? It's possible the 5A fused supply is enough for the communications to work etc, but the 40A fused supply would be needed for the amplifier itself. Have you read the codes? Maybe you'll get lucky and it will report something?
	Appreciate 0 Quote

12-03-2020, 03:12 AM	#7
matthew777 New Member 2 Rep 14 Posts Drives: F36 428i Xdrive Join Date: Feb 2016 Location: Lodz iTrader: (0)	Hi, Both fuses are ok. Code of error: B7F4E1 with desc: Undervoltage detected. I will check the rail voltage.
	Appreciate 0 Quote

03-05-2024, 04:01 AM	#8
Popell996 New Member 8 Rep 12 Posts Drives: 2020 G31 520D M Sport Join Date: Dec 2023 Location: Yorkshire iTrader: (0)	Thread resurrection! Did this go anywhere?, I have same code and lack of any sound on daughters 430i convertible.
	Appreciate 0 Quote