2PAC Mafia
Member
Hi guys,
I´m trying to solve a problem with a marine display which uses touch screen. The unit was working switching on correctly but not reacting to touch screen so I replaced it and then it was working. After some days I received the phone call from my customer saying the touch screen was failing again.
Now I took some measurements on the touch screen chip which is UCB1300. I measured resistence changes when I press between pin 27, 29 and pin 28, 30. If I measure at 28 or 30 against ground I see voltage from H to L, but when I measure at pin 27 or 29 I always see 0V.
I don´t know if there is some way to measure output or if these values measured are OK, or the chip is failing. I read the datasheet but it´s a little bit confusing for me. Any help would be good. Thanks.
I´m trying to solve a problem with a marine display which uses touch screen. The unit was working switching on correctly but not reacting to touch screen so I replaced it and then it was working. After some days I received the phone call from my customer saying the touch screen was failing again.
Now I took some measurements on the touch screen chip which is UCB1300. I measured resistence changes when I press between pin 27, 29 and pin 28, 30. If I measure at 28 or 30 against ground I see voltage from H to L, but when I measure at pin 27 or 29 I always see 0V.
I don´t know if there is some way to measure output or if these values measured are OK, or the chip is failing. I read the datasheet but it´s a little bit confusing for me. Any help would be good. Thanks.