Technical Tips - Toy Soldier Crane

Main Logic Board (W9803D)

Listed below are service tips to help you troubleshoot and resolve common problems.

PROBLEM: Not Taking Coins or Bills
SOLUTION: Check connector J-8; the IC is a 74HC244 in position U-22.
PROBLEM: Meters Not Working (Coin in/Prizes out)
SOLUTION: Check connector J-7; the IC is ULN2003 in position U-23.
PROBLEM: Gantry Switches Not Working
SOLUTION: Check connector J-4; the IC is a 74LS244 in position U20.
PROBLEM: Claw Not Closing
SOLUTION: Check connector J-4; the IC is a LM723 located in position U-43.
PROBLEM: Claw Constantly Closed
SOLUTION: Check connector J-4; the transistor is a 2SC5200 located on the large heat sink in position Q3.
PROBLEM: No VR Adjustment Controls
SOLUTION: Check connector J-5; check transistors at locations Q-36 and Q-37. Both transistors are B649. The receiving IC is located in position U-43. The IC is a LM723. Check the resistor between IC U-36 and U-33. It is a 1K 1/4 Watt resistor.
PROBLEM: Up/Down Motor Not Working
SOLUTION: Check connector J-4 pins 3 and 16; follow to relay RL5 and RL6 (Small black or blue relays located on the edge of board.) The relays are 24VDC. Relay # is OMI-SS-224L.
PROBLEM: Left/Right Motor Not Working
SOLUTION: Check connector J-4 pins 2 and 15; follow to relay RL7 and RL8. Relays are 24VDC. Relay # is SCLB-W-DPDT-C.
PROBLEM: Front/Back Motor Not Working
SOLUTION: Check connector J-4 pins 1 and 14; follow to relay RL9 and RL10. Relays are 24VDC. Relay # is SCLB-W-DPDT-C.
PROBLEM: Prize Not Detected
SOLUTION: Check connector J-10; the IC is a 74LS244 in position U21.
PROBLEM: No Display
SOLUTION: Check connector J-2; the IC output IC’s are located in positions U-25 and U-36. Both IC’s are ULN2003.
PROBLEM: Joystick Not Working
SOLUTION: Check connector J-1; the IC is a 74LS244 in position U-21.
PROBLEM: Prize Drop Button Not Working
SOLUTION: Check connector J-1; the IC is a 74LS244 in position U-21.