Rolls Royce Phantom and BMW E65, E66 LOGIC7 AMPLIFIER AND ASK UNIT DIAGNOSTICS

The article below discusses common audio issues you may experience with your LOGIC7, standard ASK system, or both. The LOGIC7 amplifier and ASK module are used in the Rolls Royce Phantom and BMW E65, E66 models.

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THE AUDIO SYSTEM

The audio system is available in two variants, standard 6 speaker Hi-Fi, and BMW LOGIC7 also referred to as ‘Hi-Fi Professional DSP’, ‘Top Hi-Fi’ or ‘Premium DSP’.

The standard Hi-Fi system has the following configuration:

ASK Module:
– 2 Front Mid Range Speakers and Tweeters
– 2 Rear Deck Mid Range Speakers
– 2 Subwoofer Pre-outs (fed directly to Hi-Fi Amplifier)

Hi-Fi Amplifier:
– 2 Underseat Subwoofers

Summary:
Conventional analogue amplifier, analogue audio is received from the ASK module and amplified for the two subwoofer channels.

Common Failure Modes:
ASK:
– Failure of one or more front or rear deck speaker outputs, usually crackling, distorted or no audio output. This is an ASK related failure.
Hi-Fi Amplifier:
– The subwoofer amplifier is very reliable and rarely suffers any failure symptoms.

The LOGIC7 system has the following configuration:

ASK Module:
– 2 Front Mid Range Speakers and Tweeters
– 2 Rear Deck Mid Range Speakers

LOGIC7 Top Hi-Fi Amplifier:
– 1 Centre Mid Range Dashboard Speaker
– 2 Rear Door Mid Range Speakers
– 2 Underseat Subwoofers

Summary:
Digital amplifier with full DSP (Digital Signal Processing) and 7 channel graphic equaliser. The audio data is received from the ASK (Audio System Controller) via a fibre optic connection, it is decoded, processed to enhance the sound and staging effects before being converted back to analogue and fed to the internal 5 channel amplifier.

Common Failure Modes:
ASK:
– Failure of one or more front or rear deck speaker outputs, usually crackling, distorted or no audio output.
LOGIC7:
– Sub-woofer output failure, resulting in crackling, distorted or no bass output.
– One or more of the three mid range speaker output channels can suffer crackling, distorted or no audio output.




2002-2005 Pre Facelifted ASK UNIT (CD-Player)

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2006-2008 Face lifted ASK UNIT (CD-Player)

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Standard problems with ASK AUDIO CONTROLLER:

– crackling, static noise from front doors and rear deck speakers. No sound at all. Therefore it will affect all service sounds like:

-PDC (parking sensors) not beeping, no NAVI guide voice,  door chimes, warning sounds etc.

– in some cases ask unit controller is not responding to fibre optic signals causing MOST fibre optic bus failure. But it does not mean the problem is your ask unit or Logic 7 amp, it could be any device in the MOST BUS network, to troubleshoot and find out which module is causing failure I will cover in details in my next post, stay tuned.

THIS VIDEO SHOWS  HOW TO REMOVE LOGIC 7 AMPLIFIER

How to remove ASK CD PLAYER UNIT?? EASY!

LOGIC 7 TOP HIFI AMPLIFIER 2002-2008image

FIRST GENERATION BAD DESIGN L7 AMPLIFIER 2001-2006:\

NOT ALWAYS FIXABLE…. 50% SUCCESS RATE.

photo 1 photo 2 photo 3

GOOD AMPLIFIER DESIGN AFTER 2006. 4 CLIPS: 

VERY GOOD SUCCESS RATE ABOUT 90%

photo 1 photo 2 photo 3

BMW Logic7 amplifier is a fiber optic controlled amplifier with FIBRE OPTIC CONTROLLER AND HIGH SPEED 24 BIT DSP PROCESSOR, therefore you can not install regular aftermarket amp. It produces 5 channels:

-sub woofers under front seats 8″ shallow type

-rear doors

-front center speaker in the dash

  Any problems with those speakers are related to the AMP and have nothing to do with the speakers most of the times, but sometimes sub woofers get flooded and therefore can be bad, causing amplifier failure. Speakers can be easily tested: it should show about resistance=4 Ohms.

   Main problem is that modules inside the amplifier overheat and die, the only way to rebuild i is to replace it, unfortunately BMW or Becker made it impossible due to non standard mini modules. we redesigned the entire system and since 2009 we did not have any returns.

Please do not even think that capacitors went bad, it never happened, but you can always check them if they are ok, before replacing it (makes sense?). But since 2009 and ~280 amps fixed none of them had bad caps.

  Another problem with Logic7 amps is that when it does not sound right, those burnt modules overheat entire amplifier causing Logic board to fail, so if your amp isn’t doing well its better not to use it and fix it ASAP.

 In most of the cases, APPLIES TO CARS BEFORE 2004 (AFTER 2004 THEY CHANGED SOFTWARE AND SETTINGS ARE ADJUSTABLE EVEN WITHOUT ANY AMPLIFIER CONNECTED!) if Logic7 level AND EQ SETTINGS ARE adjustable in the menu (entertainment), image

it means that logic board is still okay and it is fixable, but if you don’t have any sound, or if its cutting in and out, it means that Logic7 amplifier is causing MOST bus failure, and lots of things are not working in your IDRIVE:

-navigation isn’t working at all.

-is not showing consumption and other things.

-cd changer making noise trying to find a CD.

HOW TO BYPASS NON WORKING MODULE??? EASY!
HOW TO DIAGNOSE MOST BUS FAILURE ON ANY CAR WITH MOST FIBRE OPTIC NETWORKGET 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 KEEP IT

photo 2(1)photo 1photo 1photo 2photo 3

In my next Post i will cover how to diagnose MOST bus failure and what device causing it, because it could be any device in the MOST bus network, and to find it out you either need bmw software and cable or i will explain the way on how to diagnose it without anything.

IF YOU DECIDED YOU NEED HELP WITH REPAIR, PLEASE SEND YOUR AMPLIFIER OR ASK UNIT OR BOTH (550$X2) HERE ALONG WITH 550$ PAYPAL PAYED TO LOGIC7REPAIR@GMAIL.COM.

We have also EBAY add, so you can see real feedback.CLICK THIS LINK BELOW, MAKE A 550$ 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 OR LARGE BOX (15$).


We are currently not accepting packages till late March due to surgery and recovery. Please do not send us anything to avoid unnecessary delays. Sorry for the inconvenience.

 

if your car facelifted  2006 and up, its 99% guaranteed its fixable.

before 2005 logic7 amplifiers are not always fixable, so if you have cutting in and out, or it plays only from front speakers and Logic7 level is not adjustable, most likely we cannot help, but you can still bypass it and install standard amp, though it will not sound like original one, though much cheaper.

IF YOU ARE STILL HAVING PROBLEMS DIAGNOSING YOUR AMP FAILURE PLEASE GIVE US A CALL OR TXT IF NO ANSWER, SO WE WILL CALL YOU BACK, BUT PLEASE READ THE ARTICLE FIRST, IT EXPLAINS A LOT IF NOT EVERYTHING.

NOTE: If you don’t have any sound and cannot see NAVI, FM stations, CD tracks changing or playing, it means you have at least one device failure in the MOST network and you have to find out which one (most common are: NAVI, SVS, CD changer, ASK, L7, FM tuner) is causing this problem, i will be describing it in my next post. 

212 thoughts on “Rolls Royce Phantom and BMW E65, E66 LOGIC7 AMPLIFIER AND ASK UNIT DIAGNOSTICS

  1. Farah

    Hi,

    My logic 7 isn’t getting any power (e90 2005), I tested the connector, do you know if theres a fuse dedicated to the logic 7 unit?

    My original unit was damaged in a accident, I have a replacement unit now but still nothing, off course that’s because it’s not getting any power.

    Reply
  2. Gary

    Hi I’m an auto electrician I’m going to look at a 745 with i drive fault tomorrow the customer has said the screen has a fault and is on but all white (blank) , but everything else is working
    Have u any thoughts on this?

    Reply
  3. Iqs

    Hi, I have a 2003 730d, i believe its the standard ASK unit with 6 speakers. My radio works fine, my Nav, Parking beepers voice commands etc work perfectly but i get no sound when i insert a CD player in. If i start the car and insert a CD i get severe crackling and then that dies out. Any ideas? Took it to auto tronics and he changed the laser but still the same.

    Reply
  4. dre

    My speakers were crackling and now no sounds come out. I tried the fiber optic loop on the components in the trunk, but still nothing. What do you think I should try now?

    Reply
  5. moe

    Hey bro, my I drive screen is black, nothing showig but the CD player still works. Well I can put and take a CD out but can’t listen to it. Do you know the problem by any chance

    Reply
  6. Mark Johnston

    I have a 2006 750li. I’ve only had it about 3 weeks. Everything works (NAVI, radio, key chime, Idrive) but immediately noticed a crackling from the rear passenger door mid. I called the seller who sent me to the audio shop they previously took it too. They had no clue, said the speakers were bad so Their fix was to unplug the passenger seat sub. I was shocked. So I plugged it back in but found it pops and cracks and growls. I felt it was the AMP based in what Ive read, so I bought a used AMP and everything worked perfectly for a day, no hissing popping or crackling anywhere, but it lost all adjustments in the equalizer. I took it back for a 2nd used one that didnt work any better than the original one did; same crackling and popping. I broke down and bought a new OEM never used AMP still im the dealer box off eBay but after putting it in the passenger seat sub works fine, but now the drivers seat sub and sometimes the drivers door mid crackles and pops instead, as did the other side originally which now works fine. I have an appt with the BMW dealer next week but am frustrated and mad because I’m wasting money and time; could the new one be bad too? Please Help?

    Reply
    1. logic7repair@gmail.com Post author

      please email me and ill explain. driver door is youur ask cd player unit.
      if your car bjrns amps like this, it means you have bad subs overheating amps…
      replace subs

      Reply
  7. Cliff

    Question? When i bought my 2004 bmw 745li the radio and navi didnt work. After i inspected everything i noticed my logic 7 amp was missing. I bought a bus jumper to plug into the amp fiber optic wire. I know you can bypass the amp if its bad with a jumper but can you do it if the physical amp isnt even there? Another question is do you have to have the most bus jumper in the glove box for everthing to work because that was also missing when i got the car.

    Reply
    1. logic7repair@gmail.com Post author

      Yes and yes.
      If you bypass the amp without physical map it will work.
      Glovebox should have a jumper always

      Reply
  8. logic7repair@gmail.com Post author

    sure we can help. give us a call. phone number is on the page or email
    ask unit repair will resolve it 100%

    Reply
  9. Adrian

    My screen on my 2004 745i comes on with AM FM but it’s not working. No sound at all. I bought the “lollipop” but dnt really know how to use it. Can u help me thanks

    Reply
    1. logic7repair@gmail.com Post author

      screen is blank??
      you need to diagnose most bus and find the faulty unit, check my article about it

      Reply
    2. logic7repair@gmail.com Post author

      install it instead of amp into black small connetor, but its not necessarily amp problem
      read my post about how to diagnose it

      Reply
  10. Denis

    Hi, I have a 2003 bmw 745li. I initially bought the car and speakers seemed to be working fine. one week later i noticed that my driver side door speakers were not working neither of the 2. Now my issue is All the speakers in the rear have a cracking sound going and the only speakers that work are the one in front on top of dash and the front passenger door speakers work. I have no bass either so subs are not working either. Navigation is working. Please help me and respond to my email. Do i need both my L7 amp repaired and my Ask unit?? davmedoski88@gmail.com
    please email me asap i wanna get this resolved.
    thanks, Dennis

    Reply

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