Indy is in pretty good shape.
Replaced the batteries.
I finally motivated and started cleaning out the mess in my basement, making room for some pinball machines to be set up. First three machines going up are: Theatre of Magic, Indiana Jones, and Creature From The Black Lagoon.
Disconnected switch matrix row (J209) and column (J207) connectors from cpu board. Now machine sez:
CHECK FUSES 114, 115
Checked fuses, both are good. Hmmm. LED 1 is off on power driver board. TP3 tests at .463 volts. It’s supposed to be 12V. This means the switch matrix is not getting power.
Checked some more test points:
| TP1 | → | 14V | OK |
| TP2 | → | 5V | OK |
| TP3 | → | 0.4V | BAD! |
| TP7 | → | 22V | OK |
| TP8 | → | 0.3V | BAD! |
Following advice in Clay’s guide I checked for proper AC voltage at J101 and J102 on PDB:
| J101-1 | → | 5.2VAC |
| J101-4 | → | 0.3VAC |
| J101-7 | → | 10.2VAC |
| J102-1 | → | 9VAC |
| J102-9 | → | 31VAC |
These numbers were a little weird, so I checked the AC voltage at the molex connector going from the line filter to the transformer: 125VAC. Perfect.
After playing around a bit I found that with J102 disconnected J101 pin 7 read 13.8VAC and pin 1 read 8.6VAC. Since these were close to the correct value I decided that this part of the circuit is probably okay and just doesn’t read correctly with everything hooked up.
This is my first time tackling an electronics problem on any of my machines.
Slam tilts easier than normal. Adjusted the coin-door slam tilt switch a bit.
Right flipper is phantom pressing again. Very sporadic.
The right-hand “Shooting Star” cage is misbehaving. Occasionally, when the ball enters the bazaar, or activates the tiger lock electro-magnet, or disappears under the genie, the cage fires momentarily. However, it never misbehaves while the ball is in play, and it still catches the ball when it’s supposed to. I can’t seem to reproduce the problem reliably either…