Category Archives: MOST AUDIO ELECTRONIC SYSTEMS

BMW F01/F02/F07/F25 AMPT70 AMPH07 LOGIC 7 AMPLIFIER REPAIR

In this article we are going to describe another next generation LOGIC 7 amplifier, which can be found on lots of BMW vehicles: F01/F02/F07/F04/E71/e70/e64/e64 and others, usually it says on it : AMPT70 (E70/E92/E63/E64) or AMPH07LR02 (F01/02 type) img_4020 Even though they have lots of different part numbers, but in reality this is the same amplifier, the only difference is coding, so based on the type of vehicle, this amplifier is coded to support different speaker setups and crossover settings.  THIS IS HOW IT LOOKS LIKE: fullsizerender_1 This amplifier works the same way as first generation logic 7 amps was: real_oem     Head unit or CIC sends digital sound data over fibre optic network called MOST, then amplifier receives it, converts to analogue signal and powers up 9 channels in your car and you can hear high end quality sound without any noise or very low noise compared to standard analogue amps. This amplifier compared to previous LOGIC 7 generation has lots of advantages:
  • CLASS D
  • MORE POWER OUTPUT 600W
  • BETTER QUALITY BUILT BY LEAR
  • NEWER MORE RELIABLE CHIPS USED
  • SOUND QUALITY IS MUCH HIGHER
  • LESS POWER CONSUMPTION
  • LESS HEAT PRODUCED
Main problems with this amplifier:
  • NO SOUND AT ALL, SUDDEN LOSS OF SOUND
  • CRACKLING SPEAKERS
  • NO COMMUNICATION WITH THE AMP
  • LOW VOLUME AND WEAK POWER
  • NO DOOR CHIMES, NO SOUNDS AT ALL

SO GOOD NEWS WE CAN REPAIR THESE AMPLIFIERS WITH A GREAT SUCCESS.  Basically if your amp looks like the one on the pictures, we can fix it. These amps you'll find in these BMW models:X5, x6, z4, m3, f01, f02, e92, e64, e63 and may be others. Part number is not very important, because we repair them all as long as they look similar to the pictures here. On older BMW it was called individual amplifier, so higher level than just logic 7 options, usually found on top vehicles, like M3, M5, X5M, M6 and others.

  Standard symptoms:

-no sound at all

-crackling speakers or sub woofers

-no communication

-other audio issues

After repair you don't need any coding, it will be plug and play.

Frequently Asked Questions:

1. HOW DOES IT WORK?

-SIMPLE. YOU REMOVE YOUR AMPLIFIER AND SEND (FITS REALLY WELL INTO USPS FLAT RATE PRIORITY BOX 12$) IT TO US, IT TAKES 1-2 DAYS PLUS SHIPPING 2-3 DAYS MAX, also write down transaction 350$ PayPal or ebay id on the amplifier, so we know all details and where to send it back. If you didn't make the payment and want to pay once fixed, please provide your contact info (email or phone number):

LOGIC 7 AMPS

8000 RESEARCH FOREST DRIVE

STE 115-316

SPRING, TX, 77382

415-323-3412

2. HOW DO I KNOW IF MY AMP IS BAD?

-BASED ON SYMPTOMS AND DIAGNOSTICS. USUALLY NO SOUND MEANS AMP FAILED OR IF SPEAKERS DON'T SOUND RIGHT. IF WE GET YOUR AMP AND IT APPEARS ITS IN GOOD SHAPE WE ONLY CHARGE 50$ DIAGNOSTICS FEE.

3. DO YOU TEST THEM?

-YES WE STRESS TEST ALL THE AMPS PRIOR TO SENDING BACK

4.WILL IT LAST?

-YES IT SHOULD LAST SIMILAR TO BRAND NEW AMP, BECAUSE WE INSTALL ORIGINAL OEM PARTS. CHECK OUR REVIEWS, WE REPAIRED 1800+ AMPS SINCE 2011.

Also we install more powerful power chips, so it can sustain higher current ratings.

5. I HAVE DIFFERENT SYMPTOMS, CAN I CALL?

-IF YOU DIDN'T FIND ANSWERS HERE, CALL OR EMAIL HERE

415-323-3412

6. How does the warranty work??

-simple. If something happens to the amp, but without physical damage or water damage, you can send it back, all we need to know is eBay or PayPal transaction id, this is how we know all the info: when warranty starts, model of the amp and serial number and what has been done to it.

7. Is it safe for my car?

-absolutely. We install oem parts, so there is no difference made to the amp internals.

8. Is it legitimate business?

-yes it is, we've been around since 2009 fixing amps. You are fully protected by PayPal and eBay policy. Which means you can always get your money back if something didn't work out. So far we repaired 1900+ amps, we work with dealers all over the world but mostly within USA.

9. Why is it so much to repair it?

-well, this amp is fully digital and has nothing to do with old school amps you can buy new for 100$. Parts are expensive and we use expensive equipment to work on them, plus we provide 1 year warranty, which costs us a lot as well.

10. Why would I pay 350$ if I can find used amp for 300-400$??

- well, for a few good reasons:

A) we install new oem parts which usually go bad on these amps with years, so it should last longer than used amp more likely it'll last like brand new one.

B) this amplifier has your car VIN number coded. so you will not need any coding, because you will get your amplifier back which was coded to your car from factory. Coding is not that simple, so buying used amp will not be plug and play. Bmw dealer will not program used amp or any other used part to your car, only new parts will be installed and coded at the dealer, which means it might cost you up to 2000$ to install a new amp correctly. In our case you DON'T NEED TO SEE ANYBODY, which means you will spend only 350$ period.

Part 65129248552 was found on the following vehicles:

Supersedes:

65129249610
(12/01/2010 — 06/13/2013), Exchangeable retrospectively
65129239045
(09/01/2010 — 05/18/2011), Exchangeable retrospectively
65129224236
(03/01/2010 — 10/02/2010), Exchangeable retrospectively
65129221624
(09/01/2009 — 03/04/2010), Exchangeable retrospect. in connect. w
65129204842
(03/01/2009 — 10/02/2009), Bilaterally exchangeable
65129205185
(09/26/2008 — 03/17/2009), Bilaterally exchangeable
65129199860
(09/01/2008 — 08/19/2008), Exchangeable retrospectively
65129196250
(09/01/2008 — 07/23/2008), Exchangeable retrospectively
65129180183
(03/01/2008 — 10/13/2008), Bilaterally exchangeable
65129177520
(12/01/2007 — 03/19/2008), Bilaterally exchangeable
65129166075
(09/01/2007 — 01/14/2008), Exchangeable retrospectively
65129165013
(04/01/2007 — 01/23/2008), Bilaterally exchangeable
65129144275
(03/01/2007 — 05/02/2007), Bilaterally exchangeable
65129143633
(10/01/2006 — 03/17/2014), Bilaterally exchangeable
65129141667
(10/01/2006 — 09/04/2006), Bilaterally exchangeable
65129130698
(10/01/2006 — 08/16/2006)
Part 65129268833 was found on the following vehicles:
e70_amp_l70
 

BMW E65, E66, E60, E63, E90, E92, E93, E64, E87, E53, E70 AUX PORT MOD MODIFICATION

Yes, it is very annoying, that BMW decided not to install aux port by default in our vehicles before 2007. In this post let's find out what you need to get for AUX port in your bimmer. E65 BMW 750I, 750LI, 760LI, 745I, 745LI, 730I, 730D ETC. If your car is pre 2007, and you don't have aux port in your idrive and neither you have aux port in your glove box- you are not in very good shape. To say the least its the hardest bmw body type if you decided you need aux port! Why?  Because ask unit cd player and pretty much all multimedia modules in this car are digital, and there is no analogue signals anymore, and aux port signal is analogue, so common sense tells you need to convert it to digital bmw e65 signal in order to get sound from your sound system, doesn't sound easy at all to say the least. So here are the options:
  1. BMW E65 FACTORY OEM AUX PORT INSTALLATION.  DO NOT EVEN THINK OF BUYING BMW OEM AUX CORD JUST BECAUSE SOMEONE SAID ITS SO SIMPLE: BUY THE CORD 5-75$ CONNECT OT THE BACK OF YOUR ASK UNIT AND DONE??? REALLY?  YES, CORD WILL FIT IN THERE AND THAT'S IT HERE- YOU WILL NOT GET ANYTHING WORKING APART FROM THAT GOOD SIDE YOU HAVE USELESS AUX PORT IN YOUR CAR. WELL, HERE IS WHAT YOU NEED:
    1. IF YOUR CAR IS PREFACE LIFTED 2002-2005  BMW 745I, 745LI, 760LI, 730I, 730D, THEN YOU NEED NEWER TYPE MMI SCREEN FROM 2006-2008 MODELS PLUS NEWER 2007-2008 ASK UNIT CD PLAYER. AND AFTER THAT YOU HAVE TO CODE BOTH TO YOUR CAR USING NCS EXPERT BMW PROGRAM TO ENABLE AUX INPUT IN MMI SCREEN (IF SCREEN CAME FROM 2006 CAR) AND CODE ASK UNIT TO WORK WITH YOUR TUNER AND OTHER MODULES. WHY? BECAUSE EVERY CAR  HAS DIFFERENT OPTIONS AND FOR EXAMPLE RADIO TUNER WILL NOT WORK WITH NEWER ASK UNIT IF NOT REPROGRAMMED OR RECODED, ALSO SOME CARS WERE EQUIPPED WITH L7 TOP HIFI SYSTEM VS STANDARD HIFI SYSTEM, THAT'S WHY THOSE MODULES HAVE TO BE CODED. AND ONLY AFTER ALL THESE PROCEDURES YOU CAN BUY AUX BMW CORD AND IT WILL WORK! ALSO YOU WILL NEED FACELIFTED WOODEN TRIM, BC YOUR ORIGINAL WILL NOT FIT ANYMORE.
    2. IF YOUR CAR IS FACELIFTED 2006 BMW 750I, 750LI, 760LI, 740D, YOU ARE IN BETTER POSITION. YOU WILL ONLY NEED NEWER ASK UNIT 2007+, BC EVEN THOUGH THEY LOOK THE SAME, HARDWARE INSIDE IS SLIGHTLY DIFFERENT AND ONLY LATER 2006 (WEEK 30 AND UP)+ MODELS WILL WORK WITH AUX UNIT AND CODING MMI SCREEN TO ACCEPT AUX INPUT, THEN YOU WILL GET AUX IN THE MENU AND EASY WAY TO CHECK IF ASK UNIT SUPPORTS AUX IS TO SEE IF IT RETURNS AUX LEVEL AFTER YOU CHOSE AUX IN THE MENU. OLDER ASK UNITS WILL NOT RETURN THAT LEVEL SUB MENU.
2. NON OEM AUX PORT CAN ONLY BE INSTALLED VIA RADIO TUNER MODULE, YOU WILL GET CLEAR SOUND, AND IT WILL OVERRIDE ANY RADIO STATION. VERY SIMPLE, YOU PLUG YOUR PHONE AND YOU WILL GET CD QUALITY SOUND. IT WILL ONLY WORK IF YOU DON'T HAVE HD RADIO MODULE. WILL WORK WITH ANY E65 2002-2008.  THIS IS TOTALLY DIFFERENT COMPARED TO LOW QUALITY RADIO TRANSMITTERS MODS. IT HAS NOTHING TO DO WITH FM/AM, IT WILL OVERRIDE SOUND SOURCE. WORKS VERY GOOD WITH APPLE DEVICES. IF YOU NEED HELP WITH AUXILIARY PORT INSTALLATION YOU CAN EMAIL FOR DETAILS. ALL OTHER SERIES ARE MUCH EASIER. E60, E90, E63, E64, E92, E93, E87, E53, E70 WILL ONLY NEED AUX PORT ENABLED VIA NCS CODING AND BUYING A CABLE.

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

How to Troubleshoot MOST bus or how to find the faulty MOST unit ON ANY BMW, AUDI, PORSCHE, VW, MERCEDES BENZ and other cars with OPTICAL FIBRE OPTIC MOST network

image In this post we will be describing how to diagnose MOST bus failure in any BMW, AUDI, PORSCHE, ROLLS ROYCE, RANGE ROVER HSE, BENTELY with MOST fiber optic bus. every car has different configuration, but principle is  still the same! So in 2000 they introduced newer multimedia bus, called MOST, IT IS VERY NICE AND FAST NETWORK, SO THERE IS ENOUGH SPEED TO CONTROL EVERY MULTIMEDIA DEVICE AND THEY ELIMINATED LOTS OF COPPER WIRES IN THE CAR. NOW SOUND IS FULLY DIGITAL AND CLEANEST (BC NO SIGNAL LOSS ON THE WIRES), SO IT IS A GOOD THING, BUT ITS MORE COMPLEX AND NOT VERY RELIABLE. So to start you need to understand that all MOST (multimedia) modules in the car work in the closed loop, which means if any device in the loop fails-none will be working. MOST bus primary signal (optical red light signal) is generated inside of the main computer, which is your main screen CID (control display or CID in E65 car only, other BMW have main computer incorporated into head unit or CCC/CIC), then it travels through all MOST network devices (ask unit, amp, navi, fm tuner, phone etc. depending on how many options you have). Your E65 E66 or Rolls Royce phantom ( yes don't be suprised it is the same exact car as your 760li btw) car has MOST bus failure if: -cannot hear any sounds or music -cannot see tracks playing on the display -fm stations not avalaible -navi isn't functioning For other BMW like e60/e90/e70/e89/f01 and others MOST BUS FAILURE symptoms are little different because primary head unit has 4-5 modules (SVS, ask unit, MOST GATEWAY, NAVI, Radio tuner) combined and therefore everything will work except for those secondary modules: -amplifier no sound and you see mute icon on the radio or screen -TCUM or telephone module -SAT NAV receiver Here is the MOST DEVICES order diagram , but this is only valid for  basic order and only for pre 2006 cars, you might have way more devices in the network, so you have to figure it out yourself by looping eac modules and draw a diagram of the modules. Here is a quick video showing how to find a bad unit in real time: image FOR 2006-2008 cars basic order will look like this: CID>>CDC>>AVT(if you have it)>>TEL>>SAT(hd RADIO)>>L7>>SVS>>NAVI>>ASK>>OOPS(GLOVE BOX MOST LOOP)>>CID   MOST BUS ORDER: FOR e60/e90/e70/e92/e91/e93 Head unit (MASK or CCC/CIC>>>SATtuner(if equipped)>>>L7DSPAMP>>TCUM(telephone module) On these cars in most cases i see sat  and amplifier unit failure  very often, telephone module goes bad too but not that often.CCC navi units have a high rate failure, but the good thing once you replace it, you replace 5 modules at once, so its more reliable and much easier to find a faulty unit because you only have 2 or 3 modules to diagnose and all of the located in the trunk So to find out the faulty unit you either need to see a dealer (but even dealer makes mistakes),  but here is an easy solution if you don't have anything, if you do it right it always works: You need basically to find out where the most signal gets lost, after what device you don't see the red light. In other words you will be checking the red light after every device in the network, and the one which is not sending the red light signal is your FAULTY MOST UNIT. OOPS is the last diagnostic connection located in the glove box and it has lollipop attached and it has to be looped there, some people think it is a spare jumper, but its not, without this jumper you will interrupt the network!   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 KEEP THE JUMPER BYPASSED, IRT WON'T STAY WITHOUT ZIP TIE. photo 2(1)photo 1 photo 1photo 2photo 3 most common MOST devices failure (descending from most common to less): -SAT SIRIUS unit always goes bad, we will offer repair of this unit soon -Logic7 amp AMP -ask cd unit ASK -navigation NAVI -fm tuner -CD itself main screen CID -cd changer CDC -SVS (gets flooded with hydraulic fluid from trunk opener cylinder, if you see sticky fluid on the NAVI, SVS- replace asap) other modules. depending what you have in your car Always check if you have red light in the glove box, disconnect that jumper and check for the light, if you found and bypassed bad unit correctly you should see the red light in the glovebox and then you can install the jumper and everything should start working. I know it sound complicated but once you understood how it works it is kind of very easy. BUT PLEASE DO NOT BLINDLY BYPASS EVERY MODULE, LIKE LOTS OF PEOPLE DO, YOU MIGHT FIND THE PROBLEM, BUT ITS NOT EFFICIENT AND SOMETIMES YOU CANNOT DIAGNOSE IT RIGHT. ALSO MAKE SURE EVERY MODULE HAS 12v POWER. BASICALLY EVERY MODULE NEEDS FIBER OPTIC SIGNAL AND 12V POWER ATTACHED TO FUNCTION.TO WAKE UP MOST NETWORK IT IS ENOUGH TO OPEN/CLOSE THE DOOR, YOU DON'T HAVE TO START THE CAR, THE THING IS MOST GATEWAY WILL GO TO SLEEP AFTER 10 MINUTES IF NETWORK IS BROKEN AND TO WAKE IT UP YOU NEED TO OPEN/CLOSE ANY DOOR OR TURN ON THE RADIO. LIKED THIS SITE AND THIS POST?
THAT IS IT, IF YOU FOUND THE BAD MODULE YOU JUST SAVED 300-400$ AND TIME. REMEMBER LOTS BMW SHOPS STILL CANNOT DIAGNOSE IT RIGHT AND ALWAYS POINT TO ASK UNIT OR AMPLIFIER, "BECAUSE THERE IS NO SOUND", WHICH IS NOT ALWAYS TRUE, I WOULD SAY IN 50% ITS NOT CORRECT EVEN FROM OFFICIAL DEALERS. WHY THEY MADE IT SO COMPLICATED AND NOT RELIABLE?? YOU KNOW THE ANSWER-PROFIT$$!  

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.

Please also click here to check our NEW product-Remote start for E65 E66 RR Phantom, nicest feature in your car!

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: - Subwoofer output failure, resulting in crackling, distored 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) image 2006-2008 Face lifted ASK UNIT (CD-Player) image 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 (260$X2) HERE ALONG WITH 260$ 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 OR LARGE BOX (15$).

415**323**3412

 LOGIC7 AMPS

8000 Research Forest Dr.

Ste 115-316

Spring, TX, 77382

 

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.