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Sad to report another Oasys touch screen failure

 
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dave_r



Joined: 01 Dec 2007
Posts: 23
Location: Kent, United Kingdom
PostPosted: Thu Nov 06, 2014 10:22 pm    Post subject: Sad to report another Oasys touch screen failure Reply with quote
Hi Everyone,

Weird one this. I can't complain as I've had the board over 7 years now and it's been trouble - free up to this point.

It was working perfectly one night, then, next day, started up and no response from touch screen. I manually entered the calibration menu but of course there was no response from the top or bottom squares.

I then entered the diagnostic menu and ran the LCD test. Once I got to the screen with the three blue squares it was evident that there was no signal transmission for the Y axis. X axis does respond but not greatly.
(see attached image).

Again it was not possible to complete the calibration process.

At this point I began to dig a little deeper. Being a resistive touch screen it can be simply tested for continuity with a DVM.

Next I very carefully stripped down the screen surround to expose the small junction PCB which is taped to the right hand side of the LCD panel. I unplugged the loom for the digitizer and no surprise, good response on the DVM for the X axis (resistance changes nicely on the DVM when touching the screen), but the Y axis is completely open circuit !! - this appears to correlate with the results of the diagnostic test.

Just to be on the safe side I unplugged the white 4-way ribbon from the SCAN ADC board and checked continuity of that to the junction PCB and all is fine --- so --- I have to conclude that digitizer is 100% toast. Sad

I gather it's a Fujitsu N010-0554-T347 which can still be purchased from 3rd parties. I'm based in the UK I'm going to try Mouser Electronics
http://tinyurl.com/oqo8as2

Unless anyone can suggest a better contact in Europe?

Wish me luck!

Dave.
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dave_r



Joined: 01 Dec 2007
Posts: 23
Location: Kent, United Kingdom
PostPosted: Mon Nov 10, 2014 10:26 pm    Post subject: Reply with quote
Success! I have replaced the touchscreen with a new Fujitsu N010-0554-T347 and I'm glad to report the Oasys is now as good as new!

Dave.
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nitecrawler
Platinum Member


Joined: 22 Mar 2007
Posts: 975
Location: from a mile high to the the AZ desert
PostPosted: Tue Nov 11, 2014 2:53 am    Post subject: Reply with quote
That's good news!
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Montage M7, Pa5x76, Nautilus, PA3Xle, Oasys 76, Mini-Moog, EMU Audity 2000, Motion Sound KBR 3D amp, Presonus and Reaper DAW W/Tannoy Reveal 501A powered monitors
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