13
There are 2 fuses located on the Main PC Board. These
fuses protect the low voltage sides of the game, the 5 volt
and 12 volt DC. Be sure game power is off when check-
ing or replacing these fuses. Replace the Main PC Board
fuses with the original type and value. USE SLO-BLO
MDQ TYPE fuses only.
Other types of slo-blo fuses may cause unexpected prob-
lems with the game.
TRANSFORMER
ALL AC POWER MUST BE REMOVED FROM THE
GAME WHEN SERVICING THIS COMPONENT. IT IS A
GOOD IDEA TO ACTUALLY REMOVE THE POWER
CORD FROM THE WALL OR FLOOR OUTLET WHEN
CHANGING THE TRANSFORMER.
CAREFULLY document where each color wire goes BE-
FORE removing any wires.
Remove the 4 screws that hold the transformer to the
game frame.
Replace and reconnect the transformer.
TAKE ANY FAST-ONS THAT WERE ON THE OLD
TRANSFORMER COVERING THE UNUSED AC TERMI-
NALS OFF AND TRANSFER THEM TO THE NEW
TRANSFORMER. THIS IS NECESSARY AS THE LEADS
ON THE TRANSFORMER HAVE POWER ON THEM.
CHANGING AC VOLTAGES
When you receive your game from the factory, it should
be set to the proper AC voltage. If for some reason how-
ever, it needs to be set to a different AC voltage, follow
these directions.
Unplug the game from the AC outlet.
The AC input taps for the transformer are located on the
front left hand side of the transformer, as viewed from the
opening of the access door.
The AC taps can be further identified by the fact that
there are 5 taps in a row. (The only place on the trans-
former where there are 5 taps in a row.)
The bottom tap is the 0 volt tap. One side of the AC line
should always be left attached to this terminal.
The 5 taps FROM THE BOTTOM OF THE TRANS-
FORMER UP are as follows:
240
VAC
210
VAC
115
VAC
90 VAC
0 VAC
These numbers are also indicated on the transformer it-
self.
The AC wire that is on one of the above taps is the only
wire you should move. Please use a blank fast-on, on any
open terminals, to protect against shock hazards.
MAIN PC BOARD
IMPORTANT: BEFORE REMOVING THE MAIN PC
BOARD OR CHANGING THE MEMORY BATTERY, GO
INTO THE OPTIONS MODE AND RECORD YOUR
COUNTER AND GAME SETTINGS, SO THEY CAN BE
RE-ENTERED AFTER SERVICING HAS BEEN COM-
PLETED.
The Main PC Board is located on the back of the Control
Panel. Remove the 3 bolts that hold the panel to the
game and flip the Control Panel out.
Remove all AC power before removing the Main PC
Board.
Disconnect all mate-lock connectors from the PC Board.
Remove the 6 retaining fasteners and remove the PC
Board.
Install in the reverse order.
If you are installing a new memory battery or new PC
Board, after installation, reset all custom game program-
ming into system memory.
BALL SENSORS
The ball sensors are a through beam infra-red pair. To
test, walk into the game, and pass a ball through the hoop
when a game is being plated.
NOTE: DO NOT USE YOUR HAND TO TEST THE SEN-
SOR, AS THE INFRA-RED BEAM CAN USUALLY SEE
THROUGH A HAND, AND WILL NOT GIVE YOU AN AC-
CURATE TEST.
When you pass the ball through the hoop, you should
hear the swish sound from the game. If you hear the
sound, the sensors are good.
If you do not hear the sound, check the transmitter sensor
with an I.R. Detector card. (Radio Shack part no. 276-
099) The transmitter is the unit with the lit LED in it. If you
do not see any reflected I.R. light, do a voltage check to
be sure the sensors are receiving power. If the sensors
are not receiving power, fix the power problem and pro-
ceed.
MAINTENANCE & TROUBLESHOOTING
