Just picked up a Close Encounter of the Third Kind that has been sitting in a basement for quite a while. Over all the cabinet, playfield and back glass are all in great shape. Tested the bridge rectifiers and replaced all fuses. Following the guide for testing the system 1 AC power at A2, here are my AC results.

A2-P1 pin 1 = 11.5 volts AC
A2-P1 pin 2 = 11.5 volts AC
A2-P1 pin 3 = common (ground, black)
A2-P1 pin 4 = 14 volts AC
A2-P1 pin 5 = 14 volts AC
A2-P1 pin 6 = 23 - 48 volts AC
A2-P1 pin 7 = 23 - 48 volts AC

The last two pins are not showing the 69 volts. Planning on replacing C1 at 2900 mfd with a new 6800 mfd to 10,000 mfd filter capacitor. Also doing the ground mods. Don't know if this will help with the 69 volts, but it's recommended. What should I be doing besides this to get the correct voltage.

Thanks
Kickout

Cheddar,

Tested the method you used and got the following
Pin 1 & 2 ~12.7 VAC
Pin4 & 5 ~14.3 VAC
Black to J1 Pin 6
Pin 7 ~76 VAC

does this seem correct?

Cheddar,

Thanks, now on to the second part of testing the power supply the other connectors.

Ok, step 2 of power supply test. Have correct voltages on A2-P1 and A2-P2.

On A2-P3 the voltages on
A2-P3 pin 7 = +4 volts DC reads 0.7
A2-P3 pin 8 = +8 volts DC reads 0.7

Connect A2-P2 to CPU A1-J1
At C-16 reads are 0.7
At C-17 reads are 11.7

Here's where I am, now what should I be doing? Hope you experts can give me some advice.

Thanks
Kickout

Pinballdaveh,

Do i have to take these off the board to test them?

Ok here are my readings when testing the power supply board. What should I be doing to correct the missing voltages?

A2-P1/J1
A2-P1 pin 1 = 12.5 volts AC
A2-P1 pin 2 = 12.5volts AC
A2-P1 pin 3 = common (ground, black)
A2-P1 pin 4 = 15.1 volts AC
A2-P1 pin 5 = 15.1 volts AC
A2-P1 pin 6 = 35.5 volts AC
A2-P1 pin 7 = 35.5 volts AC

A2-P2/J2
A2-P2 pins 1,2 = .0 volts DC, potentiometer adjusted to full power.
A2-P3 pin 3 = Key
A2-P2 pins 4,5 = Ground
A2-P2 pin 6 = -11.9 volts DC

A2-P3/J3
A2-P3 pin 1 = 62 volts DC
A2-P3 pin 2 = Key
A2-P3 pin 3 = 45volts DC
A2-P3 pin 4 = not used
A2-P3 pin 5 = Ground
A2-P3 pin 6 = not used
A2-P3 pin 7 = +0 volts DC
A2-P3 pin 8 = +0 volts DC

Correct, I will go back and check voltages from that schematics.

The 5volt pot is turned up all the way.

Rechecked the DC voltages. Missing the +5 volts at A2P2 P1 & P2. Also missing the +4 volts at A2P3 P7. Looking at the schematic it looks to me that these voltages are all supplied by related parts on the board. Any help determining which parts I should be looking at is helpful.

Thanks
Kickout