I am working on a teardown on a 1994 camcorder when I came across a couple of devices that have me baffled. The first one is a a big 3 pin component labelled ADL-FN2033V. It stood out on the board due to its large size, at 24mm high, 34mm long and 5mm deep.
It had a plastic cover which I popped to off to reveal (front and back)
There appears to be a resistor between two pins and the three wires go to the edge of a thin piece of glass, with a paper cover between them. The resistor appears to be brown, black, brown, gold which if I am reading that correctly is 100Ω. However when I probe the resistor with my multimeter it’s an open circuit?
I have absolutely no idea what this component does (Or did in 1994). If you have any idea please leave a comment.
The 14.31 suggests to me that this is possible a crystal oscillator (14.31MHz) but why 14 pins? And then after desoldering the part, on the underside is an IC in a globtop.
I squeezed the horizontal seam of the package in a vice and got the two parts to separate revealing…
A metal canister, how very odd. So of course I took a diamond blade dremel and cut open the canister, to find it was pretty much empty?? but tipping it up and some shards (Of quartz?) fell out. Here is the big piece under the microscope.It does appear to be a piece of quartz (Or glass) with metal pattern on either side. So could it be a crystal oscillator?, perhaps packaged in a metal canister under vacuum or a specific gas pressure.
I am not sure, but speculate that the part could be a frequency synthesizer, something that is done with PLL (Phase locked loop) circuits buried inside many of todays ic’s. If you know better please leave a comment.