Greetings fellow Pinsiders!
After replacing the CPU board (thanks to arakissun for replacement), I got a Cyclone from no boot up to mostly working with these issues:
Adjust Switch 18 then C. DROP TARGET 18 message displayed on boot up. No other errors.
Outhole kicker not firing when working outhole switch triggered. No voltage change from zero observed across coil with DMM monitoring during outhole switch trigger. Measuring 4.8 ohms across coil. Confirmed continuity from each lead to its connectors on the Aux power driver board. Confirmed continuity from related points on connector to related diode(s) D45, etc. Continuity okay from related points between aux power and CPU. Measuring ~ .5v from metal tab of Q33 (for outhole coil) and other driver transistors and their respective outer leads. Replaced this coil with same results.
Found blown 2.5A coil fuse under playfield. Only had 2A replacement which blew immediately. Currently have 3A circuit breaker across it for testing while awaiting 2.5A replacement.
Shuttle kicker firing about every 5 seconds during boot up
System immediately tilts after boot up completes about 90% of power ups. Can start a game if outhole switch depressed a few times.
Spook house drop target stays down and coil does not work. Measuring 4 ohms across. Can manually lift up drop target and force down to trigger spook house mode/music. When mode ends the sound effect of spook house closing plays but no voltage change monitoring with DMM.
Ferris Wheel music cue sometimes randomly triggered, especially when ball on the shuttle kicker switch. Ferris wheel switch works but doesn't always start motor after playing a few minutes. Seems logic-related more than motor/mechanical issue.
Found blown 2.5A coil fuse under playfield. Only had 2A replacement which blew immediately (no surprise since its lower rating.) Temporarily have 3A circuit breaker across it for testing while awaiting 2.5A replacement. Above issues persist and hasn't tripped yet.
Game is otherwise playable with the playfield glass off to manually move ball from drain to plunger. Buzzed almost every driver transistor and diode to confirm proper .4-.6v on CPU & Aux Power boards as well as playfield diodes.
Any suggestions what direction to head next? Does it sound like I have an allusive short somewhere and if so what would be the best way to work toward isolating it? If all I fix is the outhole kicker I'll at least be able to play with the glass on Any advice appreciated!
Squareric
Proud owner of a whopping ONE pin working 90%