BMW E90, E92, E60, E63, E64, E61 LOGIC7 AMPLIFIER DIAGNOSTICS&REPAIR

This post is about another type Logic7 BMW amplifier. This top HI-FI DSP Logic 7 Part 65129181743 was found on the following vehicles:

This amplifier is different than E65 Logic7 amplifier, it runs different software and cannot be installed on either. This amplifier has 9 channels vs E65 with only 5 channels. This amplifier controls all the speakers on the car, so if it goes bad you will not hear any sound in any speaker. But not always amplifier is the problem, in some cases other modules go bad, interrupting MOST network and you will not hear any sound even with working amplifier.  So here i will explain how to diagnose if it is the amplifier or something else went wrong.

This amplifier has  a diagnostic LED, which will show lots of things you most likely don't know about. Here you can see where it is located. So look at that LED, turn on the radio and look at it:

basically: blinking yellow -check or bypass sat tuner or Bluetooth tel module no yellow- amp is bad steady yellow but no sound or bad sound- amp is bad e60L7led
    1. Steady yellow means its getting  input  fiber optic signal from the head unit (CCC or CIC) and output signal travels to the head unit correctly through other units , so you should hear the sound in most cases, but rarely it also could be some software glitch with CCC, when you don't get sound with working amp. Try CCC reset.
    2. Blinking yellow means AMPLIFIER IS WORKING and getting input signal from the head unit, but output signal is somewhere lost due to the next bad unit in the loop. So you just need to find a bad unit and either bypass it or replace it with a working one. Most common units to fail are: Sirius satellite unit, Bluetooth telephone unit
  1. No Yellow LED, but you can see blinknig red LED deep  inside most likely means 3 things: 
    1. amp is bad  
    2. no power getting to the amp check last 2 thick wires red and brown 12V should be present always, otherwise check fuses in the trunk.
    3. No fiber optic input getting into the amp from head unit, but in this case you should see a red LED on for 15-20secs, this means amp is waiting for a signal and if no signal present it will go to sleep mode. Easy to check, you should see a blinking red LED in the CAR CONNECTOR with the  amp fiber optic connector disconnected. If its blinking it means head unit is sending signal to the amp and amp CPU has to accept it and send the output signal back to other units and head unit eventually. Rarely, But if no red led present in the connector it means no signal is coming from the head unit due to either bad head unit or some fiber optic wire damage. If you remove head unit and you see a red light blinking, you should see the same blinking at the amp connector.
So basically you should get steady yellow LED at the amp, which will indicate the network is working, bypass not working modules and if amp is good you will get sound back to your car!

These amps are much better design compared to E65 design, but they still go bad due to following reasons:

  1. Water damage especially on convertibles 6 series, almost always we see this problem: E64LEAKIt happens when water drainage pipes get clogged up with dirt and thanks to smart design all water leaks onto the amp and other units. Please always clean those pipes with compressed air and some soap.  On 3 series we see rear taillight bolts getting  loose and therefore it leaks water inside.
  2.  Actual CPU failure or other things go bad inside the amp. We can help in this case, but can not guarantee 100% success, usually we see 60-70% success rate vs 90% e65. Good thing these amps are quite cheap on Ebay or junk yards, or new from the dealer 1200$.
HOW TO BYPASS NON WORKING MODULE??? EASY! GET THIS P/N FROM ANY BMW DEALER 61136917541, YOU CAN GET IT ONLINE FROM ECS TUNNING ECS TUNNING FIBRE OPTIC JUMPER.  YOU HAVE TO REMOVE INNER PART WITH SOME FLAT SCREWDRIVER OR A KNIFE, YOU CAN ALSO USE ZIP TIE IF YOU PLAN TO photo 2(1)photo 1photo 1photo 2photo 3

IF YOU DECIDED YOU NEED HELP WITH REPAIR, PLEASE SEND YOUR AMPLIFIER OR ASK UNIT OR BOTH HERE ALONG WITH 260$ PAYPAL PAYED TO LOGIC7REPAIR@GMAIL.COM.

We have also EBAY add, so you can see real feedback.CLICK THIS LINK BELOW, MAKE A 260$ PAYMENT, PRINT A RECEIPT AND INCLUDE IT IN THE BOX WITH YOUR AMPLIFIER OR ASK UNIT AND SEND IT TO OUR ADDRESS (SEE BELOW). USUALLY IT TAKES 1-2 DAYS TO REBUILD IT AND 2-3 DAYS SHIPPING. INEXPENSIVE AND FASTEST SHIPPING IS USPS PRIORITY MEDIUM BOX (12$).

THIS AMP IS QUITE COMPLEX INSIDE AND YOU CAN SEE NOT MANY OFFER THIS REPAIR, SOME OFFER IT AT 500$++ FOR A REASON,

415**323**3412

 LOGIC7 AMPS

8000 Research Forest Dr.

Ste 115-316

Spring, TX, 77382

10 thoughts on “BMW E90, E92, E60, E63, E64, E61 LOGIC7 AMPLIFIER DIAGNOSTICS&REPAIR

  1. Cornelius Ausborn

    Hello my ask logic 7 stereo is having issues.2006 bmw 750li At the beginning had the amp replaced. for awhile the system was working well. after that the speaker on the left side started popping and cutting out the rest of the speakers. I took it back to the local stereo guy and they told me the speaker was bad and the only way to fix it was to remove it or replace it.Unfortunatly now Im noticing that my navigation wont boot and when the system cuts out the volume is lowered drastically. any idea what the issue is.

    Reply
    1. logic7repair@gmail.com Post author

      yes, you need ask unit repaired and most likely the amplifier and navigation unt tested

      Reply
  2. Jed Ig-Izevbekhai

    Hey just diagnosed everything and thought it was the amp. so i replaced the amp and i am still getting no interior sounds. HELP. thanks

    Reply
    1. logic7repair@gmail.com Post author

      YOU NEED TO DIAGNOSE AND FIND FAULTY UNIT, AFTER 2006 AMPLIFIER DOES NOT GO BAD COMPLETELY TO INTERRUPT MOST NETWORK, SO IT COULD BE ANYTHING, BUT MOST LIKELY SAT RADIO MODULE, NAVIGATION, TCU…

      Reply
  3. joseph stukes

    2006 bmw 325i e90 n52 logical 7 system bmw profession radio no sound from all speakers, door chimes works any thing works on radio can set stations can see car input on radio screen, i check the amp there is 12 volt power on brown and red wire on amp i do have a steady yellow light and steady red light inside of amp, i bypass the amp with loopy pop still no sound from speakers but at the fiber optic conection steady red light there also check and by pass the bluetooth unit in trunk steady red light at fiber optic cable end so bcan you help or should i send the amp in for you to check and repair

    Reply
    1. logic7repair@gmail.com Post author

      steady yellow light means there is no other issues on the most bus and amp is working mostly, but not completely, so you need it fixed. send it over or contact us

      Reply
  4. Mohd Omari

    Hello my ask logic 7 stereo is having issues.2006 bmw 750li At the beginning had the amp replaced. for awhile the system was working well. after that the speaker on the left side started popping and cutting out the rest of the speakers and when the system cuts out the volume is lowered drastically. any idea what the issue is.
    Please note that when i replaced the amp i noticed that that i didn’t find for one free fiber plug a place in the amp…then i connected the fiber wire with other wire which both of them were fixed with same plug to get the system working…but the cutting sound problem still and i scaned the car with troubl scaner and i found that the audio syst is overheating….please advise.

    Reply
  5. Matt

    06 e90. Radio will sporadically cut off and I’ll get error code CC-ID 299 SOS malfunction. Have blinking red light at Amp, Sat, and Navigation (all three modules in the trunk). Once it stops, it will randomly cut back on and sound great then go out again. No crackling, no fuzzy speaker sounds just instant no sound. Ordered most loop jumper to test. Where to start?
    Thanks!

    Reply

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