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[roycv]

Hi all a friend has asked me to look at his 2 off Saturn X4 transmitters.
 One switches on and the red then green lights come up.  The other, only the red liight comes up. 

He said when he changed the batteries over that then ithe other works OK.  I have not found this to be true but he has severe limited vision. 

I have charged the batteries even put new dry batteries in but the same one refuses to light the green light.

Is this part of the binding / pairing process.  I found the pairing instructions on the Internet but they just say switch on and both lights should be on.
I do not have a rx to do any testing.

Is the transmitter faulty?

Any help appreciated.
regards Roy

[radiojoe]

Hi Roy I have the Saturn X6, the two lights do indeed form part of the paring procedure but should both light up when switching on, it could be the green led has failed if this is the case the TX should still work as normal, but would have an effect on the low battery warning,

[Netleyned]

You might like to check the voltage on the pcb
header from the battery pack in case you have
any corrosion on the battery holder.

Ned

[malcolmfrary]

With my Saturn, it should only try to go into pairing if you have the PDM button pressed before and during switch on.  Both LEDs should light in normal operation to indicate a good battery.  I have noticed that it doesn't like rechargeables - it complains of low battery by bleating at me, but is perfectly happy with alkalines.  If the one that only shows one LED doesn't bleat, but works OK otherwise, its probably just the LED not working, rather than anything deeper in the system.


Totally non-intuitive binding -
1.  Turn on the receiver power supply first, press the "pair" button for more than 2 seconds.  The receivers LED will blink quickly.
2.  Hold down the transmitters PDM button then switch on the transmitter power switch.  The transmitter Red and Green LEDs will flash alternately, then release the PDM button.
3.  Press the transmitter PDM button again.
     When pairing is complete, the receiver LED will stop blinking and stay on.
     The transmitter LEDs will also stop flashing.
4.  After a few seconds, the receiver should start to respond to the transmitter.
5.  Finally, turn off the transmitter and back on again to store the pairing.


Doing step 2 should indicate whether it is a dud LED or something driving it.

[roycv]

Hi all, thank you very much for responding.  I visited my friend this afternoon and was unable to do any testing as the rx's are located in narrow gauge locos with the rx's in the side tanks!  A certain amount of de-construction is necessary.  But as he is 96 and still active we sat and had a cup of tea and a chat and set the world to rights.

I will let you know what the resolution is as soon as I know.  I printed off Malcolm's helpful notes and passed them on.
Thank you all again,

kind regards
Roy