need help on HMI allen bradley versaview 1700M

[timalg]

Hi my friends,
please I need help to repair the HMI allen bradley versaview 1700M .the problem is the HMI runs normally whemn switching on.and after few seconds the screen becomes black.please can you help even please documents,schemes of this HMI.

thanks

[timalg]

Re: need help on HMI allen bradley versaview 1700M

any help please?

[R_J]

Re: need help on HMI allen bradley versaview 1700M

Can you still see whats on the screen if you shine a light at it? does the backlight stay on? could be ccfl or inverter failure
I doubt you will find a service manual or schematic for AB

[timalg]

Re: need help on HMI allen bradley versaview 1700M

Can you still see whats on the screen if you shine a light at it? does the backlight stay on? could be ccfl or inverter failure
I doubt you will find a service manual or schematic for AB

thanks R_J,when I power on the backlight are On but after few seconds they become off

[R_J]

Re: need help on HMI allen bradley versaview 1700M

But Can you still see the video on the screen if you shine a light on it. If you can the fault might be a faulty inverter or ccfl, Open it up and provide some pictures of what is inside.

[timalg]

Re: need help on HMI allen bradley versaview 1700M

the inverter is EMAX PLCD0915411

[timalg]

Re: need help on HMI allen bradley versaview 1700M

But Can you still see the video on the screen if you shine a light on it. If you can the fault might be a faulty inverter or ccfl, Open it up and provide some pictures of what is inside.

thank you R_J tomorrow,I attached the pictures of the HMI

[timalg]

Re: need help on HMI allen bradley versaview 1700M

these are other pictures

[R_J]

Re: need help on HMI allen bradley versaview 1700M

Check the voltages on the inverter plug when unit is first turend on. There are 6 wires, I suspect the two yellow are supply, the two black are ground, the single red could be inverter ON, and the white could be DIM
If the voltages stay the same when the display goes dark, the fault could be on the inverter or a bad ccfl lamp
I would guess the supply voltage will be 12 volts, inverter on is likely 5 volts, dim would be variable between 0-5 volts and might be a negative voltage

In that first picture of the logic board, and near the label [13AZ53-02-012] seems to be a legend for one of the plugs, I see:
pin 1-3 ??
pin 4 Bright
Pin 5 Back-Light ON\OFF
pin 6-7 GND

[timalg]

Re: need help on HMI allen bradley versaview 1700M

yesterday I did the test when the screen was dark .the voltage in the yellow wire of the inverter is 5V,and on the red wire is 12V.i tested with new backlight i got the same result

[R_J]

Re: need help on HMI allen bradley versaview 1700M

So what changed from when the screen works and when it goes dark?
What do you mean by tested with NEW backlight?
New CCFL lamps?
NEW inverter board?

[timalg]

Re: need help on HMI allen bradley versaview 1700M

thanks R_J when I tested I did not measure voltage before it went dark,I tested with New CCFL lamps.

[carpy]

Re: need help on HMI allen bradley versaview 1700M

Hi Did you get it sorted as i am in the same boat? Where can i get a new inverter.Thanks