Jet SPACE BALLZ Service Manual page 58

PROBLEM
Crane claw will not release ball when either
the "Drop Button" is pushed (or) when the
game play clock has expired
1) There is a loose wire or pin in one of the
wire harnesses going from the Output board
to the solenoid.
2) There is a broken wire in the cable tray /
cable protector going to the solenoid
3) The solenoid PCB (MJ13007.PCB) is faulty
4) There is not 12 Volts going to the solenoid
5) The linkage that attaches the crane claw to
the solenoid plunger is disconnected or
missing.
6) Replace the IC that controls the Output for
# 32 or the Input/Output board is faulty
Jennison Entertainment Technologies
SPACE BALLZ TROUBLESHOOTING GUIDE
CAUSE
1) Check to make sure the pins in all the Molex connectors that power the
claw solenoid are properly seated. Start with the two pin Molex at the
solenoid. Then check the 12 pin Molex located just inside the rear access
door and above the CPU (Computer). Then continue on to the solenoid PCB
(MJ13007.PCB). This is located just under the games Input/Output board.
Check that the J2 connector (The one that has the two RED wires and one
WHITE wire in the three pin Molex) is properly seated and the pins are
secure. From there continue out the J1 Connector to Output # 32 on the
Input/Output board.
2) The most common place for a break is within in the cable tray wire
protector. Perform a continuity check both the RED and the WHITE wire
going from the two pin Molex at the solenoid to the 12 pin Molex connector
inside the main cabinet and above the CPU (Computer). During a continuity
check - you will most likely find one of these two wires to be the problem. If
you DO NOT get continuity on one of these two wires, replace that wire
segment between each Molex connector. If you DO get continuity on both of
these wires, continue to perform the same check on each segment described
in section 1.
3) If you do get continuity on all wire segments from the solenoid connector
to J2 on the MJ13007.PCB and you get continuity on the wire segments from
the J2 connector to Output # 32 on the Input/Output board - try replacing
the MJ13007.PCB board. If that doesn't solve the problem, continue on
below.
4) Check to make sure that there is 12 Volts going to the crane claw solenoid.
Check the solenoid itself. With the game turned OFF, apply a 12 Volt power
source directly to the solenoid to check its operation. If the solenoid is in fact
working properly, continue below.
5) If all wires are intact, the solenoid PCB good, and the solenoid itself
working when power is applied to it. There only other problem could be
loose linkage at the solenoid itself. The crane claw is attached to the plunger
mechanism with mechanical linkage. A bolt with a lock washer are used to
secure the linkage to the plunger. Check to make sure that all linkage is
secured and tight. Check to make sure both springs are firmly attached. The
purpose of the springs are to assist the claw to return to a closed position
after the solenoid is de-energized.
6) If all the linkage is properly attached and the crane claw physically open if
you apply had pressure to the solenoid plunger and all of the above steps
have been followed - then the most likely issue is a problem with the
Input/Output board.
Space Ballz Service Manual
SOLUTION
Page 58