You could look to see which other instruments Tektronix used part
number 150-1018-00 in to widen your selection of parts mules.
Also, you can reverse engineer the pinout from either the schematic
(they are common anode and the decimal point is pin 6) or by just
pulling one and using your multimeter diode test function to check
each pin versus each other pin. It does not take long to do.
There is some weirdness with the common anode connection since it
appears that the displays internally are made of three units with 3
separate anodes (pins 3, 9, and 14) but maybe the anodes are connected
together internally.
I guess even low profile collet socket pins would not be low profile
enough to use as sockets. That is too bad.
On Wed, 20 Feb 2013 22:48:28 -0800 (PST), HankC <hankc918@...>
wrote:
Tnx to the group for the suggestions on my DC504 display.
I swapped one display digit with another & the problem followed the swap.
So, the consensus of the group that it was a display problem was
correct.
The pn of the originals is DATA-LIT10A, which I believe was made by Siemens.
Tek pn is 150-1018-00 but it is not listed in Tek's 1982 Parts Catalog.
I cannot find a source for these so I can't be sure of its configuration (common cathode ?? Pinout, etc)
The chips are soldered into the display PCB. the leads come out the back of the package, along the 2 long edges. The leads are round wires, about 1/8 inch long. Package is about 1/8 inch thick.
Pin spacing is the same as a socket but there is no room to install sockets because the main PCB is right up against the back of the display PCB.
Sockets would make the whole assembly too thick to fit. I had to grease it to get it out :<)
Not all pin positions are populated; One edge has 4 pins, then a gap, then 2 more pins. The other edge is opposite; the pins are grouped 2 pins, gap, 4 pins.
The individual digits butt right up against each other; there is no space between them.
Someone suggested using FND357's as a replacement but there is a lot of variation among parts with this number so there is no telling what I would get.
(leads along the short edges, common anode, decimal point location, socketed, gap in pin spacing, etc).
The display board which holds these chips has a number on it which looks like a truncated Tek pn (3659-01)
If anyone has a parts donor DC504 & is willing to sell the display board, pls let me know.
HankC, Boston
David Hess