Monday, October 18, 2010

Futaba T6EXA Assan Hack

Futaba T6EXA Assan Hack

I spent quite a bit of time looking at the Assan hacks and figured it wouldn't be that bad. It was really pretty easy. Here is how I installed the Assan hack module in my Futaba T6EXA. I assume it would be the same for the T6EXH as well. I will probably be doing this mod on my T6XA sometime this Winter if I like how this one works. I have not yet installed a receiver in an airplane to check it out, but it does work well with a power system I had removed from a crashed plane.



Items you will need include:
- Wires for extension. I used some servo extension wire which works out pretty well.
- DPDT locking switch. I know other people are not using a locking switch, but I definitely don't want to hit the switch while flying and lose an airplane.
- Soldering iron and solder
- Heat shrink tubing
- Drill and drill bits.
- Hot glue gun and glue sticks



Remove the battery cover and battery.

Remove the crystal.

Remove the four screws that attach the back transmitter case half to the front case half.

Remove the back case half.

Once you have the case open, you will see the RF board sitting on 4 pins. It's the board with the trainer connector.

Pull the RF board off it's mounting pins being careful not to tear out the wires.

Find where the purple wire labeled Vcc is attached to the RF board and remove it. I just take my hot soldering iron and touch it to the solder pad while gently pulling on the wire. It doesn't take much to pull it off.

Find the other end of the purple wire on the main board and remove it. Make sure you remember where you removed it.

Add a red wire to the pad where you removed the from and attach the other end of the red wire to one of the center contacts on the switch.

Find the white wire labeled MOD on the RF board and remove it from the RF board.

Attach the end of the removed white wire to the end of the orange wire and attach the other end of the orange wire to the other center contact on the switch.

Attach a red wire from the red wire on the Assan module to the switch.

Attach an orange wire from the the orange wire on the Assan module to the switch.

Attach an orange wire from the RF board MOD pad (where you removed the white wire) to the switch.

Attach a red wire from the Vcc pad on the RF board to the switch.

When you are attaching the wires to the switch, make sure that the red wires are in one row and the orange wires are in the other row. Also make sure that you put the wires from the Assan module on one end of the switch and the wires from the RF board on the the other end.

Attach a brown wire from the brown wire on the Assan module to the GND pad on the RF board (black wire). Note: the black wire stays attached to the RF board.

Remove the LED from the Assan module and attach extension wires to the LED and the Assan module board. Make sure you mark the LED leads so that you don't get it turned around.

Remove the 72MHz antenna.

Drill a 1/4" hole in the front case half for the 2.4GHz antenna.

Drill a 1/4" hole in the front case half for the switch.

Drill a 1/8" hole in the front case half for the LED.

Install the 2.4GHz antenna connector in the front case half in the hole drilled for it. Make sure the antenna connector nuts are good and tight.

Install the switch in the front case half in the hole drilled for it.

Attach the 2.4GHz antenna wire connector to the Assan module.

Reinstall the 72MHz antenna.

Install the 2.4GHz antenna on the installed connector.

Temporarily install the battery and 72MHz antenna and verify proper operation. I used an airplane that I fly with that transmitter and then did the bind procedure in the instructions with the Assan module.

Remove the 72MHz antenna and battery.

Route the new wires where they won't interfere with operation of the transmitter.

Place the Assan module in the front case half near the top of the case between the case and the 72MHz antenna.

Hot glue the Assan module in place.

Put a small amount of hot glue around the base of the LED and push it into the hole drilled for it.

Put the back case half back in place and reinstall the 4 screws.

Reinstall the battery and put the battery cover back in place.

Hope other this helps someone else.

Tim
Attached Thumbnails
  • Name: Assan Hack 01.jpg Views: 341 Size: 155.6 KB Description: 155.6 KB · Views: 341

  • Name: Assan Hack 02.jpg Views: 604 Size: 111.1 KB Description: 111.1 KB · Views: 604

  • Name: Assan Hack 03.jpg Views: 655 Size: 127.7 KB Description: 127.7 KB · Views: 655

  • Name: Assan Hack 04.jpg Views: 503 Size: 77.5 KB Description: 77.5 KB · Views: 503

  • Name: Assan Hack 05.jpg Views: 650 Size: 103.7 KB Description: 103.7 KB · Views: 650

  • Name: Assan Hack 06.jpg Views: 591 Size: 114.5 KB Description: 114.5 KB · Views: 591

  • Name: Assan Hack 07.jpg Views: 532 Size: 129.3 KB Description: 129.3 KB · Views: 532

  • Name: Assan Hack 08.jpg Views: 552 Size: 144.2 KB Description: Note how the wires are attached to the switch.Note how the wires are attached to the switch.144.2 KB · Views: 552

  • Name: Assan Hack 09.jpg Views: 412 Size: 139.8 KB Description: Drill the antenna, switch and LED holesDrill the antenna, switch and LED holes139.8 KB · Views: 412

  • Name: Assan Hack 10.jpg Views: 468 Size: 124.8 KB Description: LED wire extensionLED wire extension124.8 KB · Views: 468

  • Name: Assan Hack 11.jpg Views: 420 Size: 120.3 KB Description: Installing Assan module and LEDInstalling Assan module and LED120.3 KB · Views: 420

  • Name: Assan Hack 12.jpg Views: 480 Size: 106.2 KB Description: RF board wiring changesRF board wiring changes106.2 KB · Views: 480

  • Name: Assan Hack 13.jpg Views: 469 Size: 124.3 KB Description: 124.3 KB · Views: 469

  • Name: Assan Hack 15.jpg Views: 359 Size: 83.5 KB Description: Front of the transmitter after mod.Front of the transmitter after mod.83.5 KB · Views: 359

  • Name: Assan Hack 16.jpg Views: 365 Size: 64.1 KB Description: Top of the transmitter after mod.Top of the transmitter after mod.64.1 KB · Views: 365

  • Name: Assan Hack 17.jpg Views: 258 Size: 79.5 KB Description: Assan module on just starting up.Assan module on just starting up.79.5 KB · Views: 258

  • Name: Assan Hack 18.jpg Views: 261 Size: 82.1 KB Description: Assan module on and ready to run.Assan module on and ready to run.82.1 KB · Views: 261

Attached Files

Last edited by t_j_walker; Sep 18, 2009 at 10:26 PM. Reason: Add schematic
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Old Sep 18, 2009, 10:16 PM #2
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Join Date: Jul 2004
Location: Richland, Michigan
Posts: 166
alternate method

You can do a simpler modification by:
Adding the signal wire from the Assan module to the MOD pad on the RF board

Adding the + wire from the Assan module to the Vcc pad on the RF board

Adding the - wire from the Assan module to the GND pad on the RF board

Then, when you want to run 2.4GHz, just remove the crystal. When you want to fly 72MHz, put the crystal back in. Make sure your 2.4GHz planes are off though, since it will be transmitting as well.

I don't really like this one since both transmitters are running all the time. Plus there is the possibility of starting up a plane that had the battery left in it.

Tim

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