Chosen Solution
Hey Everyone, I need some help with an integrated circuit for my 2008 Beetle. This is for the radio head unit. A cluster of buttons on the radio console do not work (most frustratingly the disc eject). I believe I have traced the problem to the circuit with the buttons (you can see the non-functioning buttons surrounding the volume dial). The red circle represents the missing element and the blue circle represents what I believe to be the element that is missing.
As you can tell from that last sentence I am a little outside my league on this. Here are my questions: What is the black piece inside the blue circle?Is it what is missing from the red circle?Where /How do I buy a new one?Can you give me any information that would help me? Thanks Everyone! Update (12/06/2020) Thank you @oldturkey03 !! I measured the diode/transistor, the dimension of the ‘box’ are 2.88mm x 1.55mm (A&B from link).
I measured the G&L of the missing diode/transistors. It appears the G is 1.3 and the L is 0.65 so I believe it would be SOT323. What are my next steps? Do the dimensions indicate it is a transistor or diode? I am uncertain. Will purchasing one and soldering it on solve my problem? Where can I purchase a replacement unit? Thank you for your help!! It is much appreciated!
@adamschwarz those look like Diodes. Bad thing is that there are transistors that look identical so if possible post a close up of one of those and possibly measure length and width. That way we can hopefully identify the value and package size. If it is a SOT-23 3L package than the diode should be a MMBD 1405 This is based on the marking “34” which according to my database is only used for a few components.
Check the package size and measure the component. Then check the dimensions listed on here. Let us know what you find. Looking at where the component is located my prime suspect is a diode.
