DX7 Lipo Conversion Programming
Plugs right in, no problem. Diode drops the voltage, though most are not doing it. You will not regret the $20.
You can reprogram so your lipo does not go too low, easy:
Ensure the Aileron D/R switch is in the UP position.
Press and hold the DOWN and SELECT buttons and turn on radio. Now you're in the setup menu.
Scroll up/down until you get to the screen that says [Model Reset]
Press the Adjust Descrease button (r/h side of LCD)
Flip the Aileron D/R switch down
Press the Adjust Increase button
Flip the Aileron D/R switch up
Press the Adjust Descrease button
Keep alternating this Aileron D/R up/down and Adjust Increase/Decrease sequence (about 5 cycles)
The radio will 'beep' and the LCD will go dark. This is the LCD test.
Scroll Up/Down (left side of LCD screen) through the Service Menu
Go to alarm menu, set alarm to 9.5V,and voltage to 11.5, ( if you have a fully charged 12.6 3S in there).
Scroll to "all settings ok?" push clear.
Now updated.
mlucia wrote ...
Thanks for the info. Mark B. So, do the tx lipos simply plug into the DX7 or do you have to attach a special plug? I guess that is where I am unclear. Also, are you running a diode inline or no? I have read people are not and it has been 2 years without issues? Appears the slight over voltage does not cause issues?
Did you recalibrate the power meter as I have read?
Seems as if people want to place an order for some? I wont be able to order until after IRCHA (Saving my pennies) which is August 10-14th. Someone else may want to take on that.
In the Process of creating a more permanent page for this topic I have created a youTube Video of the process.
http://www.youtube.com/user/GreenMountainRC#p/a/u/0/mIqSn2QVKsk
Later I will make a formal page with Pictures and this video.
I might have asked this on the old site, but will this same set up procedure work on the 6i as well?
The DX6i runs off a much lower voltage, somewhere around 6 volts? i think? this would put you in the 2S battery range, there isn't a whole lot of info out there on converting a DX6i, it seems like a few people have done it, but it sounds like it is a lot more involved where you would have to put Diode's, new voltage regulators, etc. Definitely not a "plug-n-play" situation like the DX7.
Also in my search on this topic, I found that while the DX7's voltage regulator can handle the 3S the heatsink for it is supposedly undersized. Some people opt'd for installing new voltage regulators in the DX7's to fix this.
If you want to modify voltage alarm for Lipo 11.1v to 9.6v:
Accessing the X9303 and XP9303 Service Menu:
- Pull Throttle Hold switch into the forward position. (ON)
- Pull AILE D/R switch up. (
- Power the set on while keeping ENT button on front panel pressed.
- Rotate roller activator until Trim Step is highlighted.
- Press roller activator on Trim Step, rotate to AILE.
- Switch AILE D/R down (1), press roller activator, switch AILE D/R up (, press roller activator.
- Repeat Step 6 four more times and on the 5th (total) time access should be granted to the Service Menu.
- Here is a list of things you can do - should be in order as you scroll through each item.
This is not a complete list, and there are likely lots of other things that can be done.
- From here, SW test allows you to test each switch and microswitch.
- The next menu item is Hard. Con. By rotating the selector bar it becomes obvious what can be changed by soft selection.
Where the highlighter does not move it indicates that this is a hard connection on the PCB,
but in conjunction with the table this can be modified accordingly.
- Next item is Stick Neutral. Center all sticks and side trimmers, press CLR followed by STO.
This then stores all the centers for the sticks.
- Next is Stick Ga. Moving all sticks and side trimmers to max & min positions finalizes the stick calibration.
- Moving the selector across to the right allows for setting front panel voltage,
and at what voltage the alarm will activate for low battery.
- There are various ways to exit, and each one has a different effect.
- Total reset of system and loss of models stored, reset of the config data only.
- For straight calibration purposes, rotate back to EXIT and press the button next to : Reset start (No Initialized)
OR
Make sure that THOTTLE HOLD is the rear right switch on top of set. ( IT IS THE SMALL "SLIDER" ON THE RT SIDE OF THE RADIO)
1 Pull Throttle Hold switch into the forward position.
2 Power the set on whilst ENT (Front Panel is pressed)
3 Rotate until Trim Step is highlighted.
4 Activate on Trim Step, rotate to AILE
5 Switch AILE D/R down, press roller activator, switch AILE D/R up, press roller activator.
6 Repeat sequences 4 times and on the 5th, access is granted to the EM.
From here, SW test allows you to test each switch and micro switch.
The next menu item is Hard. Con, on rotating the selector bar it becomes obvious what can be changed by “soft” selection. Where the highlighter does not move to indicates that this is a hard connection on the PCB, but in conjunction with the table this can be modified accordingly.
Next item is Stick Nut. Centralize all sticks and side trimmers, press CLR followed by STO. This then stores all the offsets for the sticks.
Next is Stick Ga., moving all sticks and side trimmers to max & min positions finalizes the stick calibration.
Moving the selector across to the right allows for setting front panel voltage, (Lithium voltage will display as 0.0V) and at what voltage the alarm will activate for low battery.
To exit this Engineering, rotate to EXIT then select Restart
THIS MENU IS NOT INTENDED FOR END USER USE.
To enter the service menu:
- Begin with the transmitter off, and all switches towards the back of the radio.
- Hold the trainer switch on right hand side of transmitter (some reports say throttle hold switch) forward.
- Hold down the scroll wheel, and switch on the radio, entering the system menu. Release the scroll wheel.
- Use the scroll wheel to select TRIM STEP, then click the scroll wheel to enter the TRIM STEP menu.
- Use the scroll wheel to select aileron trim step.
- Click the scroll wheel, then move the aileron dual rate switch forwards or backwards.
- Repeat step 6 until the service menu appears.
- Release the trainer switch.
Great! Thanks Matt...
Can you add at the top of the post the links here for the actual lipo for the TX? Here is the original.
http://hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6955&Product_Name=ZIPPY_Flightmax_2500mAh_Transmitter_Pack_(Futaba/JR)
or this one:
http://hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=7346&Prod...
You can install a diode from radio shack to drop the voltage your TX sees, most folks don't do it.
Cautions, tape the plug on the side of your TX so you don't use it to charge, and now use 10.5V as the low voltage to charge your lipo.
Mine lasts a long, long, long time.......................
-Protos Carbon (Again
-Trex 700e 12s / Scorpion 4035-400 / Castle Creations 85HV / Turnigy 6s 5000 25c x 2 (In series)
-Trex 700n LE 3G Flybarless