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JBL MBB2020 Troubleshooting Manual

Other manuals for MBB2020: Operation Manual

Summary of MBB2020

  • Page 1

    Jbl mbb2020 troubleshooting guide prospec electronics note: please click on highlighted words for links to this page and our website. 1 wiring 2 compatible accessories 3 list of common issues 3.1. No power 3.2. Intermittent power 3.3. Buttons/controls not responding/erratic controls 3.4. Usb issues ...

  • Page 2

    1.0. Wiring follow the wiring diagram above. • the red acc wire is designed as the trigger to turn the radio on. It recommended that this wire is connected to an on/off switch for purposes of lowering the current draw on the battery while the radio is not in use. • both red acc and yellow battery wi...

  • Page 3

    3.3 buttons/controls not responding/erratic controls • check each button on the control pad for sticking. Under normal conditions, a faint click is heard upon pressing each button. If any button does not click, initiate a warranty claim if you are under warranty. • detach any additional equipment co...

  • Page 4

    3.5 poor or no reception 3.5.1 for an amplified antenna ensure the antenna is connected to power and ground according to manufacturer’s instructions the antenna wire should never be coiled or wound up. Check proximity of radio, speakers and antenna to gages, gps equipment, depth finders, led lightin...

  • Page 5

    3.9 audio shoots up when bluetooth is on • check the bluetooth volume by holding down the sel button until i-vol appears. Then, press the sel button until btvol appears. This btvol is usually higher than the stock radio i-volume. 3.10 moisture in display 3.10.1 water seen inside display after washin...

  • Page 6

    4 external amplifier issues/subwoofer operation 4.2 strong hiss – reduce the input gain on the amplifier until the hiss is reduced to an acceptable level while still maintaining performance. Note, if both amplifier and stereo output can produce distortion, the input gain is much higher than it needs...