Dead JR 388S

[rinkhals]

Hi there chaps, the long and the short of my problem is that "little fingers" turned my JR 388s and left it on. When I picked the radio up it was dead as a doornail and even after charging it up- Nothing! I have even replaced the lithium battery, all to no avail...... it does not even "peep" when I turn it on! Do any of my more learned friends please have any idea as to what and the f%$%#$ is wrong with the f@#$%ing thing? I thank you all very kindly in advance......

[rick.benjamin]

Do you have a voltmeter? A cheap one is better than no one.
Is the battery properly plugged into the transmitter?
The battery plug is tiny, and the xmtr pins are tinier.

[Bruce Abbott]

After changing the backup battery you need to 'reboot' the CPU. Then it should work, but the factory calibration settings are lost so stick center positions and battery voltage display may be a bit off.

The picture below shows where to short out two pads, which pulls the CPU Reset pin down to Ground (this is an X347 board but I believe the X388 is similar). Unfortunately I can't remember if the short must be maintained while turning on the power switch, or applied after powering up.

If you want to recalibrate the radio then you will need to know how to get into the hidden service menu (http://www.rcgroups.com/forums/showpost.php?p=2175517&postcount=3).

[rinkhals]

Gentlemen, thank you so much for your help- I think that i have it now- you're the best!!!

[dylan roberts]

there is a service menu for the 388, all u need is in there(also ccpm setup for helis)

[dylan roberts]

hope this helps

[rinkhals]

Hey there Dylan- shot for that mate..... Where are you from in the RSA ? Cape Town I hope, but then I am biased!!!

[dylan roberts]

ha ha ha ha ha ha...the flying weather is better up here in jhb ;-) iv actually never seen capetown... been to the airport, but that was it. let me know if you get 388 sorted

[Radiokai]

Thanks all, this just helped me out and revived my X388.

...Kai

[NX-687]

Im enjoying my 388 , mixing and all

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