MTP850 not entering programming mode

[redinception]

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!

[KingAnon]

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

[redinception]

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

[KingAnon]

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

[redinception]

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?

[DCA]

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.

[redinception]

Hi all,

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