Author Topic: 7" screen repair?  (Read 2713 times)

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Offline warmbloedTopic starter

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7" screen repair?
« on: May 16, 2015, 07:53:28 pm »
Hello everybody,

I have an old 7" lcd screen that I want to put to some use with a raspberry pi, unfortunately, I can't find any type of documentation so I opened it up in the hopes of being able to find the pinout. I think I have found the connections for power but I am unsure. There are a few bridge wires of which I don't know if the previous owner or the chinese kids put them in. What would be the best way of finding these power connections? I was hoping that once I found those I could take analog video and audio outputs to search for the AV connections.


It's a Zanon MTP-769 using a SHARP display and I cam almost certain it needs a 12V intput

I thank you all!

EDIT: Apparently the image link broke, I have now hosted my image elsewhere, Without Rasz's post I may never have spotted this, thank you, also I have found that the 05DZ11 was outputting 0.3V so I have since attatched the 5V rail directly to it's output pad(updated picture above), still won't turn on though.
« Last Edit: May 19, 2015, 10:44:46 am by warmbloed »
 

Offline Rasz

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Re: 7" screen repair?
« Reply #1 on: May 18, 2015, 07:39:52 am »
you can start by buying yourself a camera
Who logs in to gdm? Not I, said the duck.
My fireplace is on fire, but in all the wrong places.
 

Offline warmbloedTopic starter

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Re: 7" screen repair?
« Reply #2 on: May 19, 2015, 10:45:32 am »
Thank you for your reply, otherwise I may not have noticed that the link had broken.
 

Offline Rasz

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Re: 7" screen repair?
« Reply #3 on: May 19, 2015, 11:45:59 am »
http://circuits.datasheetdir.com/45/TL1451A-EP-circuits.jpg

you could start with pin 9 of that, maybe 12v, maybe less. its dual channel so my guess is you only powered half the stuff with that 5v

whats the chip with nsp7something sticker? and the sharp in left upper corner, one of them will have datasheet with RGB/AV pinout

ps: is there a connection between pad with red wire and pin 3 of the chip you took off?
Who logs in to gdm? Not I, said the duck.
My fireplace is on fire, but in all the wrong places.
 


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