COPYRIGHT
1995 MERIT INDUSTRIES, INC.
18
SCORPION™ 9000 MANUAL
PM17170C
TROUBLESHOOTING
(MERIT CUSTOMER SERVICE 1-800-445-9353)
PROBLEM ACTION
No sound, overhead display or overhead
light.
Check AC outlet for power.
Check for blown fuse.
Sound and overhead display function, but
no overhead light.
Check for proper connection of overhead lamp wiring via the
STG03.
Check fluorescent tube.
Check lamp starter if applicable (some lamps do not need starters).
No power up sound or overhead display,
but overhead lamp turns on.
Check all connectors to power supply, AC input, +5V, and +12V
outputs. +5V output must be >5.2V
Check power connections to J1 on the STG01 board.
Power-up sound & overhead lamp
function, but no overhead display.
Check 40-wire ribbon cable from STG01 to the overhead PC board
for proper fit.
Replace the overhead unit as necessary.
No sound.
Adjust volume control R25 on STG01 board.
Check the connections to the speaker.
Check for the presence of +12V on the power supply.
Replace STG01 board or the speaker as necessary.
RAM reset on every power-up.
Check for correct DIP switch settings.
Check integrity of DIP switches using game test switch.
Replace the STG01 board as necessary.
No push-button lamps light.
Check proper connection of lamp connector J4 on STG01.
Check black common wire loop to each lamp.
Check for presence of +12V.
Replace the STG01 board as necessary.
Individual overhead LEDs do not light.
Check the LED. Use a multimeter.
Replace the driver IC as necessary.
Some or no buttons or coin inputs work
on the STG01 board.
Check proper connection of switch connector J3.
Check green common wire loop to each switch.
Check each switch for functionality.
Replace STG01 board as necessary.
Coin jam display.
Check the coin switch mechanism for a possible jammed coin.
Check the actual coin switch for jammed lever.
Ensure that the switch wiring connects the normally open contacts.
Stuck segment display.,
Check that the wing nuts holding the target back board are finger
tight.
Check for broken tips wedged between a segment and the spider.
Check for broken tips stuck behind a segment.
No missed darts detected, auto player
change not working.
Switch position 3 on DIP switch 1 must be ON; check for correct
DIP switch settings.
RDP28 has not been properly connected to STG01 for missed
darts; also check microphone connection.
Check ultrasonic cable connection to J9 of STG01.
Player change works but no missed darts
are detected.
Check the microphone connections to the RDP28 board.
Check for correct DIP switch settings.
Automatic player change does not work.
Check for correct DIP switch settings.
Is the cable from the ultrasonic transducer connected correctly to
J9 on STG01?
Replace the ultrasonic transducer.
Replace the STG01 board.
Only some missed darts are detected.
Replace the RDP28 board.
