High-voltage supply rebuild parts, System 3 to 11C
Q1 MJE15030 (for SDS201), Q2 2N5401 (for MPSD52), Q3 MJE15031 (for SDS202), Q4 2N5551 (for MPSD02); ZR1/ZR3 1N4730A 3.9 V (for 1N5990); ZR2/ZR4 1N4763A 91 V (for 1N4764); D3/D4 1N4004; R1/R4 39k 2 W (for 39k 1/2 or 1 W); R2/R5 1.2k 1 W (for 680 ohm 1/2 W); R3/R6 330k 1/2 W.
The display supply runs at about 100 V DC (plus and minus) with large filter capacitors; work with the game off and unplugged, and measure live only with insulated probes.
Systems
- Williams System 3
- Williams System 4
- Williams System 6 / 6A
- Williams System 7
- Williams System 9
- Williams System 11
- Williams System 11A
- Williams System 11B
- Williams System 11C
Related tips
- Routine high-voltage changes on every System 11 power supply
- Parts of the 28 V solenoid supply
- What the System 11 power supply board feeds
- Fitting the high-voltage kit
- Display voltages at 3J5, power supply D-8345 (High Speed to Swords of Fury)
- Rebuilding the +100 V section of the power supply
- Rebuilding the -100 V section of the power supply
- No +5 V on a System 3-6 power supply
Source: Williams Systems 3 - 11c High Voltage Parts Kit