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Thread: MTP850 not entering programming mode

  1. #1
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    Default MTP850 not entering programming mode

    Hi all

    I have a MTP850 that is connected to a USB to Serial converter and a NKN6544B cable. When I press 1 9 and red power button for over a minute, the radio would not enter programming mode and it stays dark. When I press red power button, the radio powers on normally. Can it be the CPS disabled programming mode?

    Thanks!

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  3. #2
    Junior Member Reputation: 10
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    Default Re: MTP850 not entering programming mode

    Hi,

    Try to click the Search for rs232 radios under tools and try it again. With an serial cable it's a little tricky to get in in programming mode. You could also try to use an native serial port which is recommended.

    Best regards
    KingAnon

  4. #3
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    Default Re: MTP850 not entering programming mode

    Thank you, would it be that the radio is purposely programmed by previous user to disable entering programming mode or is that not possible?

  5. #4
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    Default Re: MTP850 not entering programming mode

    No. As long as it's starts it works. Try to first press 1 9 and on then click the button in the software.

  6. #5
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    Default Re: MTP850 not entering programming mode

    Thanks,
    I tried a different usb to serial converter and connected the radio to the computer, still no luck. According to the service manual, the flashing / programming mode is only possible when the radio is connected to CPS?

  7. #6
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    1 out of 1 members found this post helpful.

    Default Re: MTP850 not entering programming mode

    that's not entirely true. make sure you use a programming cable with the switch in the right position. (flashmode)
    Bootloader should be able to load from CPS then.

  8. #7
    Junior Member Reputation: 10
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    Default Re: MTP850 not entering programming mode

    Hi all,

    Just want to report that after receiving the USB programming cable, PMKN4026B, the radio programmed up like a charm. Thanks all !

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