Troubleshooting guide

Cinematronics Vector Monitor Repair Guide v.1.0
Page 45 of 53
Symptom: Player Control Button(s) Inoperative.
 Refer to player control schematic in APPENDIX.
 Verify with ohmmeter proper closure of player control leaf blade switches.
 Remove J3 connector. Measure +5 volts on D4 - 1, 2, 3, 4, 12, 13, 14, and 15. If missing,
replace D4. Replace pull up resistor pack D2.
 Measure +5 volts on C4 - 1, 2, 3, 4, 12, 13, 14, and 15. If missing, replace C4. Replace pull
up resistor pack C2.
 Coin up a game and, with J3 disconnected, ground aforementioned pins on C4 & D4. If
display responds, problem is in continuity from J3 to player control switches [i.e., in the
wiring harness].