Hi all,

I am working on my Abrams tank and got a TK60G2 from clark.
After connecting everything i was not able to get the second motor running.
Then i tested as good as i could and was shure that the board has a failure.
I discussed that with Clark and he send me a new one while i sent mine back.

Now i got the new one and have the same problem!

I am already in contact with Clark again but i thought it would be good to ask here, maybe somebody can help.

First, i have a DKLM metal chassis with a differential gearbox.

Referring to the board guide http://www.clark-model.com/eng/prod_rx60g2/index.html

I connect:
Power to CN1
Jumper on SW
Motor 1 (Drive) to CN6
Motor 2 (Steer) to CN7
Loudspeaker to CN5
Volume adjust to CN4
Recoil and Elevation Servo to J2 and J4
Turret Motor and Coaxial LED to CN9
Tail Light to L4
Gun Flash to J3

The Channels 1 to 8 from the Receiver are connected to CH1 to CH8

The mixer mode is set to 2 (According to Clark this is correct when using a differential gearbox).

When i switch on the power everything is working, from firing the gun, recoil, turret rotation and gun elevation, i can switch the light on and the sound is running.

When giving signal to Channel 1 the tank is moving forward and backward so channel 1 and output for drive motor is working fine.
When giving signal to Channel 2 nothing happens. The steering motor on CN7 gets no output.

If i swap the motors the steering motor works on channel 1 so both motors including the cables are fine.
If i swap channels 1 and 2 from the receiver (1 to 2 and 2 to 1) its the same behaviour, only that channel 2 on transmitter works and channel 1 does nothing.
So the receiver outputs and cables are okay. If i connect servos directly to the receiver all channels are working.

So for me it looks like channel 2 input on the board is not responding.

If i try any of the other mixer modes the tank does nothing. Probably because throttle is always on channel 2 in other mixer modes and channel 2 does nothing.

I have no idea what causes this... i still would tend to a board failure, hardware or software, but then i wouldnt be the only one who has this failure !?

I got no reply from Clark yet... so, does anyone have an idea ?

Hopefully you get what i mean, because english is not my native language

Regards,
Olaf