On August 11, 2008 at 13:15, fcouma said...
Hi,
Sorry but I'm french customer of a Marantz RC5400 and
I've got the touchscreen problem and calibration fail
when I try to update the firmware...
I try to fix the problem : clean the contacts
I removed the cover and i find this :
the touch screen is welded to the printed circuit in two
points !! (red circles)
The TSU3000 is also welded ??
I don't undertand the meaning of : "pry the green frame
off the touchscreen" ?
I can see the four contact points on the flexible plastic
but i'm not able to clean them neither the metal strips
at the top and bottom of the screen
So What can I do ? Someone can help me ?
thanks
You donīt need to unsolder the LCD from the main board to try this fix. The contacts people are talking about are indeed the points where the ribon cable of the touchscreen touchs the glass panel.
The problem in your remote is that the ribon showed in your first picture, loses their contact at the point that it touch the glass. The ribon is gluded there and after some time this contact get lost. The ribon is a 4 way flat and touch the glass in four points. You can try perfurate the ribon in each contact where it touch the glass and see if the contact is restored.
Sometimes just puting some pressure on it solved the problem. Some guys used the expression "to clean" the contacts but they are only making pressure on them, since the real contact is under the ribon, betwen the ribon and the glass. Perfurate the ribon on the 4 contact points make the conductor cupper bends and sometimes it makes the contact touch the glass again.
Last edited by ossocao
on August 12, 2008 17:13.
