Quoted from Pinball_Gizzard:
Looking for a little guidance on a capacitor replacement project. I ordered the System 11A capacitor kit from Big Daddy. [quoted image]
The caps kit is a must for our over 30 year old machines. That said, while you have your soldering iron hot and the desoldering braid all fluxed up, you should consider the high voltage side as well. There are good instructions in other threads and some say the kits from Great Plains is no longer available. Just today I ordered these parts from Marco.
MJE1503 Transistor (it will different pinouts then the one you have.
2N5401Transistor, PNP (Replaces MPSD52)
MJE15031 Transistor, PNP (it will also have different pinouts then the one you have)
2N5551Transistor, NPN (Replaces MPSD02)
1N4730A Zener Diode, 3.9 Volt (Replaces 1N5990) ZR1, ZR3 so you'll need 2.
1N4763A Zener Diode, 91 Volt (Replaces 1N4764) ZR2, ZR4. 2 again
1N4004 Rectifier, 400V, 1A D3, D4. Get 2!
RMOS2-39K Resistor, 39K, 2 Watt (Replaces 39K, 1⁄2 or 1 Watt) R1, R4 (Get 2)
680, 1⁄2 Watt Resistor. They did not have the 1.2K 1 Watt Resistor, R2, R5 (anyway 2 of those) but if anyone has a source for the 1.2 K replacements, let me know.
RCF1/2-330K Resistor, 330K, 1⁄2 Watt R3, R6 You'll need 2.
This will lower the voltage to the displays a bit (assuming you still have the original gas displays) and replace parts that are simply old.
Here's where they go with perfect pictures from Pinsider TROXEL.