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Author Topic: Video display communication failure ?  (Read 1948 times)

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Offline Oldslot

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Re: Video display communication failure ?
« Reply #20 on: November 01, 2022, 10:46:10 AM »
Thank you so much for your help. I will get the parts and report back with the results.

Offline Oldslot

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Re: Video display communication failure ?
« Reply #21 on: November 01, 2022, 10:55:19 AM »
Thanks again for the video! Very helpful. My next question is .. I understand this will lite my screen. Will this resolve the neplex link issue? And allow this board to boot? Thanks

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Re: Video display communication failure ?
« Reply #22 on: November 01, 2022, 11:44:18 AM »
The board pics.
« Last Edit: November 02, 2022, 09:49:10 AM by shortrackskater »

Offline Tilt

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Re: Video display communication failure ?
« Reply #23 on: November 01, 2022, 12:01:38 PM »
Thanks again for the video! Very helpful. My next question is .. I understand this will lite my screen. Will this resolve the neplex link issue? And allow this board to boot? Thanks

No. The only thing it will do is light up the top screen so you can see what it's doing hopefully.  It's possible that your inverter board is good and the CCFLs are bad.  You'll know for sure when you swap the inverter board (what bunker calls a ballast).


Offline Stayouttadabunker

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Re: Video display communication failure ?
« Reply #24 on: November 01, 2022, 12:03:28 PM »
I couldn't really tell from your photos if any IC component is burned out.
Look carefully at each IC component.
You may see one that looks overheated....the circuit board itself around the chip will look a little browned.
Anyways, not too important as you're getting another working ballast anyway.
The IC components on these ballasts or invertor boards are really small and tough to repair without proper magnifying soldering equipment.
Micro-soldering is another level of board repair.
Swapping out the invertor board is cheaper than swapping out the CFFL's at the moment.
They are NOT easy to get at in the LCD....if we findout that your CFFL's won't light up after you change the invertor, then I can give you a link to a new LCD screen that should have good CFFL's inside.

"Netplex link" message on the blue VFD display can mean several things.
However, replacing a burned out LCD screen ballast will NOT make that message go away....in fact, your burned out LCD invertor/ballast has nothing to do with it.
I DO have a link to a short pdf file about diagnosing a "Netplex Link" error message.
It actually says "Netplex Link Down"...not sure if there's a difference.
Maybe someone can chirp in here.
Give me a few minutes to search for it.

Okay...I found it...I copy&pasted it.
You can try it while waiting for your topbox unit parts...here it is...>>>

How to diagnose a Netplex Link Down error.

First disconnect all Netplex devices except the blue VFD display. 
This includes the bill acceptor, printer, some progressive displays, some top box bonus devices.
Now that those are disconnected check the following.

Is your error solid or blinking.
Blinking
     Do you have a 50x or 1270 mpu?
     1270
          Remove the Varta and U16.
      50x
          MPU fault.
Solid
     Do you get no disp on your credit display
     No
          The MPU is not booting check the mpu for signs of faults or problems with the chips.
     Yes
          Check voltage at the blue VFD display on the 2-pin connector.
          Check the data cable for any signs of damage, especially where the door closes.
          MPU is faulty or damaged...check for bent pins.


Later on, if we find that your cheaper part (the LS520 invertor board) doesn't light up the LCD, there are replaceable LCD screens with the CFFL's inside available here and there online.
Here's a link to some replacement LCDs that I've found that work with the Vision topbox LCD units...>>>
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=Sharp+LQ10D421&_sacat=0

I've taken one of these small LCD's apart...believe me, it's easier and cheaper to buy the whole thing than to try and locate/replace the CFFL's that go inside of it.
The model number of the LCD screen is...>>> Sharp LQ10D421

Click on photo below to enlarge if needed...>>>

« Last Edit: November 02, 2022, 04:50:16 AM by Stayouttadabunker »
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Offline Oldslot

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Re: Video display communication failure ?
« Reply #25 on: November 01, 2022, 06:22:32 PM »
Thanks. I will post progress.

Offline Oldslot

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Re: Video display communication failure ?
« Reply #26 on: November 05, 2022, 03:09:10 PM »
I got the new board and put it in.  Does not work or light up.... I saw in another post the box that is behind the hopper - where the Grey wires from the small display plug in could be bad? It has a red led light that is not lit.  The link to buy one shows out of stock. Are these available somewhere else? Thanks

Offline Tilt

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Re: Video display communication failure ?
« Reply #27 on: November 05, 2022, 03:17:50 PM »
That could be the problem with your comm error message, but it won't fix topbox display.  The CCFLs in the panel must be bad in it. 

That red led is not normally lit.


 

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