I am trying to work trough this list made by Pin_Guy
The game did not have the tieback mod and fried a coil and the board. new board and coil is in the game.
Here is the checklist:
In order to properly diagnose this problem you should perform testing on all parts listed above with power off:
1) You should read a short between the +50V TP (TP6) on the power board and J4-1 CHECK
2) You should NOT have a short between J4-1 (50V) and J4-7 (GND) CHECK
3) With the J4 cable removed, the coils should measure around 10 ohms each between the Pin 1 of the J4 cable and solenoids at pins 2, 4, and 5; and 5 ohms at pin 6.
4) The transistors should have high resistance between J4-7 (GND) and the solenoids connectors on J4 pins 2-6 with the cable removed CHECK
5) The blocking diodes should pass a diode test between J4-1 (+50V) and the solenoid connectors on J4 pins 2-6 with the cable removed CHECK
If the above tests do not ALL pass, powering on the machine could result in secondary failures as mentioned above.
Any suggestions on what to test next? i do not get the readings on
3) With the J4 cable removed, the coils should measure around 10 ohms each between the Pin 1 of the J4 cable and solenoids at pins 2, 4, and 5; and 5 ohms at pin 6.
my readings is way off. am i using the multimeter wrong?
please educate me