Navigation & Audio Harman Kardon HK Troubleshooting Help Request
#1
Harman Kardon HK Troubleshooting Help Request
2003 R53 w/ stock HK sound system.
When I bought the car, the amp was dying. And then it died. And then I bought a "known good" unit from random eBay seller. And now, I still don't have any sounds. Here's where I need your help.
The system with eBay amp does not produce sound when using the Schwaben scan tool, CD, or FM radio. The 15A and 5A mini-fuses are good. The system doesn't produce any "thump" or other sounds when connecting and disconnecting the eBay amp with the key on. I grabbed the multi-meter and made a few measurements:
Questions:
When I bought the car, the amp was dying. And then it died. And then I bought a "known good" unit from random eBay seller. And now, I still don't have any sounds. Here's where I need your help.
The system with eBay amp does not produce sound when using the Schwaben scan tool, CD, or FM radio. The 15A and 5A mini-fuses are good. The system doesn't produce any "thump" or other sounds when connecting and disconnecting the eBay amp with the key on. I grabbed the multi-meter and made a few measurements:
- Pin 5 +12VDC input = 12.14VDC
- Pin 10 +12VDC remote = 10.57VDC
- Pin 26 DC Ground =
- conductivity between grounding bar next to amp mount,
- conductivity to battery
- .6Ohms to grounding bar next to amp mount
- Pin 27 KBus = 11.35VDC
- Pin 9 HU Input FR+ to Pin 17 HU input FR- = .1-.3VAC
- Pin 30 HU Input FL- to Pin 38 HU input FL+ = .3-.7VAC
Questions:
- Is 10.57 sufficient for the remote/turn-on lead signal?
- Are the HU input measurements within spec?
- At this point, if Q1 and Q2 are yes then everything upstream of the amp is good and it's possible that I bought a bum amp fro eBay.
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