My cousin, who works at philips, found a PM 5107 function generator and gave it to me. As far as I know it is in working condition, but I didn't dare to plug it in without letting her warm up a little bit. So while I'm waiting for a variac which I can borrow I decided to tear her open and inspect her guts.
Front
This is a very basic function generator, so basic that it can only generate sine waves or square waves.
The other specs are:
10 hz - 100khz
0-2 volt amplitude + a -20 dB attenuation button
TTL out and of course your normal output
Oh and a lighted power button.
While stripping her down I noticed that philips didn't use philips screws on a philips device
Metalized enclosure
Hand drawn PCB...
Do you know how simple this function generator is? That 6 pin DIP IC, that is an OPAMP. No specialized chip or something, no just a simple lonely OPAMP.
http://g-pb.de/datasheets/TAA761.pdfPowersupply
The brains
TLL circuitry
Output buffer
Since I couldn't find a (free) service manual I decided to reverse engineer the schematic myself. The results are not yet presentable but if someone happens to have the PM 5107 service manual I would love to have the actual documents. I may do a video teardown with a friend of mine but it all depends of how much time we have on our hands.
Before someone asks: the little bag contains merely a 115 volt sticker.
Maybe upcoming: A philips scope (sorry forgot the name) and a huge 0-120-250 volt 0-10-5A DC philips powersupply (appears to be something custom because there is no information available)