Pumpkin CN27 -- How to upgrade the MCU for CN27 series car stereos

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Pumpkin CN27 -- How to upgrade the MCU for CN27 series car stereos

Postby Jammy » Tue Sep 24, 2019 1:35 am

CN27 series car stereo SKU: AA0485B, AA0484B, AA0405B, AA0452H, AA0451B, AA0436B

1. If your car stereo cannot start after using a few days, you can try to plug out their power cable and then plug in again, then the car stereo can start, please upgrade the MCU to the newest version to solve this problem.

New MCU version download link: https://mega.nz/#F!fKYHzSSQ!lldrq_lSFgUps1dqrXUpBw

Upgrade steps: Copy dmcu.img file to the root directory of the U disk, insert the USB port and then click the setting--system---MCU upgrade.



Finished the upgrade, you can check the MCU version, the steps are Setting - System - About Machine - MCU version. The upgraded MCU version is MTCE_HT_V3.30_1.
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2. Even if your car stereo without this problem, also please check the MCU version of your car stereo. If the MCU version of your car stereo is MTCE_HT_V3.18m_1, please upgrade to the newest version. The upgrade steps are similar to the above. Upgrade the MCU version can make your car stereo run more stable.
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Note: This MCU upgrade software only fits in this 6 car stereos now, the SKU is AA0485B, AA0484B, AA0405B, AA0452H, AA0451B, AA0436B. If installing a wrong MCU upgrade software, it will cause damage to your car stereo. Other car stereos need to update software, please contact us.



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