Color c-touch color can read but not send out c-bus messages

Thankyou MrMark for advising how to repair the unit,
Thanks to Kevinqpsd for sharing the solution,
Thanks to Sea Captain for recommending to replace C81 without disassembling the unit.

Happy Days,...until the next CBus problem!

Sk3ll3m

 

My CTC hasn’t been sending cbus commands for while. So i changed the capacitor a few weeks ago. The CTC has been working perfect.
Then I had a client with the same problem. So this evening I changed the capacitor very easily. But when I put it all back together the screen doesn’t come on. It beeps when you touch it. I have taken it apart a few times and checked all the connections and still no look.
Does anyone know what to look at and anywhere in the uk that will look at it. Or maybe if it come to it send it to Australia.

thanks

 

Hi Ben,
I used to work for Arbor, the original manufacturer of the color touch screen (And now JEA Technologies is currently the authorized Clipsal repairer of these units), the transmit issue is a known problem in the CTC1 and CTC2 units only, the cct was changed for the CTC3 unit it will never have the same problem. Your problem of not working when reassembled could be many things but first try the small 4 pin cable that provides power to the LCD back light inverter PCB.
Also another common one is on CTC2 units the small DC-DC converter box on the power line has inbuilt protection and wont restart if it detects a problem., to fix this turn off the AC supply and wait for 2 mins then restart the power, if it is ok a green led should light up on the side of the box. Also ensure that both PCB's are firmly pushed together during reassembly. Anything else and you can contact me via email. I have in the past sold and purchased touch screens from all over the world including the UK.

Trevor Callaghan
JEA Technologies
Unit 3, 36 Koornang Road
Scoresby Victoria 3179

[email protected]
0404 887 463

 

Hi Trevor,

Mine was a CTC1 the client one is ctc2. I will try what you have said over the weekend and see if it work. If not I will drop you an email.

thanks

 

Some other things to check for...
Blue led top right corner is on
Does unit beep at startup
Screen is blank but is there a text msg across the top
Is the cf card seated correctly
Regards Trevor

 

Hi,
Yes blue light on,
Screen beeps when I touch it
No txt on screen just blank
cf card is in

thanks

 

Thats sort of ok then, check the 3 pin cable plugged into the backlight inverter pcb. If you very careful you can check the voltage on the pcb connector, if it is 0v and 5v and something in between short out the 5v and thd something in between, this will drive the inverter pcb full on, BUT ONLY YOR A SECOND, incase you short out the 5v to ground. Should be enough timevto see if screen comes on.
Next foes the screen come on at all during boot up.
Last check
Can you guess were buttons on the screen are... if so give it tine to boot up the press were you think light switch buttons are if they turn on/off then you need a new lcd or inverter pcb. Very uncommon to have no voltage going from the pcb to the inverter but possible, this would need some small transistors to be replaced....
Regards Trevor

 

Hi Trevor,

I got it working today. I had got the 3 pin connector the wrong way. When I checked the voltage it didn’t make sense so swapped it around and the screen worked. thanks

 

Glad to hear it.

 

Now when you have a real fault you know were you can send it for repair.

 

Hi Trevor,

if it wasn’t for your help I may not had found it. But yes I know where you are now.
You can’t fix edlts can you? Or 12ch relays with power?

thanks

 

Pm me at...
[email protected]