Question about JBL - MR4W Am/Fm with CD Player White

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JBL MR4 Marine Stereo - blank Screen

I have a 2005 Azure AZ211AZ boat with the JBL MR4 marine stereo system. The system worked fine until I removed the detachable face plate. When I put the face plate back on, I get nothing. With the face place off I see a constant red LED. Pressing the reset button does nothing. The fuse is good and power is being supplied to the unit. I checked all the connections under the dash and everything looks good. Is it possible that there is some sort of security code I need to punch in after puttingg the face plate back on?
Mark

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
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Posted on Jan 02, 2017

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Benimur

Louie Role

  • 6966 Answers

SOURCE: jbl marine mr-17 all funtions are frozen

Hi,

Initially, have you tried a full hard reset? The reset button is at the panel at the back of the faceplate, bottom left side. Of course doing so will also erase all presets and user settings & configurations.

Additionally, pls verify that the multiple contacts pins are clean, free of corrosion and makes a positive contact with its mate at the rear of the faceplate. If the unit is used in a salty environment, it may be necessary to manually scrape of whatever blue green build up develops between the connector pins and the plastic insulator. You can try using an old toothbrush and WD40.

Further to check are:
1. the red, yellow and black wire are tightly connected where they are supposed to be connected. If the unit is used onboard, it might be to your advantage to likewise check the grounding system;
2. one of the rear connector is for a remote, pls likewise check that none of the pins are shorting and no presence of any corrosion.

If problem persists, it may be necessary to seek the services of a qualified professional as this involves opening the unit up and tracing the circuitry of the logic/controller circuit.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on May 04, 2008

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jango2

Jango Fixit

  • 38 Answers

SOURCE: AM/FM radio on boat,

First thing i'd do here would be to investigate if the electromagnetic interference is coming in through the supply feed. I would bring another battery on board (Charged fully), one that isnt connected to the boats electrical system and see if the emi still afflicts reception. If it stops or reduces to a permissible level one can attack the problem with emi suppressors and filters. A good place to start would be the alternator, try suppressing the emi at source.
The second path the emi takes to pollute reception would be via air straight to the units antenna.
The solution sought here might not be a single remedy but a total of 3 or 4 tweaks, each leading to a percentage improvement. try shifting the antenna too, maybe shielding might contribute some.
Jango

Posted on May 27, 2008

Anonymous

  • 638 Answers

SOURCE: I have a JBL MR-17

check the antenna its connection and also try replace the antenna .its only because of antenna.

Posted on Jul 01, 2008

Anonymous

  • 131 Answers

SOURCE: won't read the CD's now

have you ever cleaned the lazer lens? goto any CD store and pick up a CD cleaner CD, it is a CD that you place a drop of cleaner on the brushes on the bottom of place it in the CD player and let it play, it will clean the lens that reads the cd, you might have to run it a few times if you have never done this before. that should fix the problem. the CD cleaners are not that expansive, can find them under $20...... hope this helps you..........

Posted on Jun 01, 2009

Anonymous

  • 207 Answers

SOURCE: I have a JBL MR-31 Marine AM/FM/CD/Sirius Ready

yes i am a repair shop and i have had nothing but problems out of those units you might want to look into a different unit boss marine is a good choice

Posted on Jun 27, 2009

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