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Old 09-05-2018, 11:49 AM   #1
timalg
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Default need help on HMI allen bradley versaview 1700M

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
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Old 09-06-2018, 03:25 PM   #2
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Default Re: need help on HMI allen bradley versaview 1700M

any help please?
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Old 09-06-2018, 03:46 PM   #3
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Default 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

Last edited by R_J; 09-06-2018 at 03:49 PM..
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Old 09-07-2018, 10:08 AM   #4
timalg
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Default Re: need help on HMI allen bradley versaview 1700M

Quote:
Originally Posted by R_J View Post
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
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Old 09-07-2018, 11:09 AM   #5
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Default 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.
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Old 09-07-2018, 11:20 AM   #6
timalg
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Default Re: need help on HMI allen bradley versaview 1700M

the inverter is EMAX PLCD0915411
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Old 09-07-2018, 04:36 PM   #7
timalg
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Default Re: need help on HMI allen bradley versaview 1700M

Quote:
Originally Posted by R_J View Post
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
Attached Images
File Type: jpg IMG_20180906_165523.jpg (959.5 KB, 6 views)
File Type: jpg IMG_20180906_165611.jpg (726.8 KB, 6 views)
File Type: jpg IMG_20180906_165623.jpg (759.8 KB, 6 views)
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Old 09-07-2018, 05:00 PM   #8
timalg
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Default Re: need help on HMI allen bradley versaview 1700M

these are other pictures
Attached Images
File Type: jpg IMG_20180907_173720.jpg (948.3 KB, 6 views)
File Type: jpg IMG_20180907_171357.jpg (705.4 KB, 5 views)
File Type: jpg IMG_20180907_171355.jpg (705.6 KB, 5 views)
File Type: jpg IMG_20180907_095659.jpg (366.5 KB, 5 views)
File Type: jpg IMG_20180907_062308.jpg (531.0 KB, 5 views)
File Type: jpg IMG_20180906_165623.jpg (759.8 KB, 5 views)
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Old 09-07-2018, 05:52 PM   #9
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Default 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

Last edited by R_J; 09-07-2018 at 06:41 PM..
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Old 09-08-2018, 02:46 AM   #10
timalg
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Default 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
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Old 09-08-2018, 10:35 AM   #11
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Default 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?
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Old 09-08-2018, 03:42 PM   #12
timalg
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Default 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.
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