Is there anymore text before "Chk. switch/coil"?
I did a quick google search and came up with the following error messages that Shadow can display.
ER. LOCKUP IS BAD CHK. SWITCH/COIL
This is saying that the 3 ball lockup at the top of the playfield is not working correctly. Check to
see that the three lockup switches (lockup right #63, lockup middle #64, lockup left #65) are
working properly (check with balls sitting on switches) and that the lockup kickout coil (#02) is
working correctly. Also check for blown fuses.
ER. WALL TGT. BAD CHK. SWITCH/COIL
This is saying that the sanctum wall controlled target is not working correctly. Check to see that
the wall drop down switch (#51) is functioning correctly (it should trigger closed when the wall is
down) and coils #08 (wall target up) & #16 (wall target down) are functioning. Also check for
blown fuses.
ER. DROP BANK BAD CHK. SWITCH/COIL
This is saying the mini-playfield 4 bank drop targets are not functioning properly. Check the mini
drop bank coil (#24) and the four drop target switches (#85-#88), 12v power supply and the CPU
board. Also check for blown fuses.
ER. BAT. DROP BAD CHK. SWITCH/COIL
This is saying that the single drop target at the entrance to the popper (battlefield) is not
functioning correctly. Check to see that the battle drop down switch (#55) is functioning correctly
(it should trigger closed when the drop target is down) and coils #25 (single drop up) & #36
(single drop down) are functioning. Also check for blown fuses.