Fixing the Problem: Resolving Ball Trough Issues in WPC Pinball Machines
Introduction
WPC (Williams Pinball Controller) pinball machines are known for their robust design and entertaining gameplay. However, like any complex mechanical system, they can occasionally encounter issues. One common problem is when the ball does not kick out from the ball trough as expected. This article aims to provide a practical guide to identifying and repairing such issues, ensuring that your machine remains in top condition.
Understanding the Ball Trough Mechanism
The ball trough mechanism is crucial for the smooth operation of your WPC pinball machine. It consists of several components including the ball trough itself, a microswitch, a solenoid, and wiring connections. When the game starts, the ball should be kicked out from the trough by the solenoid acting on the microswitch signal. If this process fails, it’s essential to troubleshoot the issue systematically.
Step-by-Step Troubleshooting Guide
Step 1: Inspect the Microswitch
The first step is to check if the microswitch is functioning correctly. Open the backbox and locate the microswitch located near the ball trough. Ensure that the switch is properly seated and that the lever is aligned with the ball path. A faulty or misaligned microswitch can prevent the solenoid from receiving the correct signal.
Step 2: Check Wiring Connections
Inspect all wiring connections between the microswitch, the solenoid, and the control board. Look for loose, damaged, or disconnected wires. Loose connections can lead to intermittent signals, causing the ball to fail to kick out. Tighten any loose connectors and ensure all wires are securely fastened.
Step 3: Test the Solenoid
Once the microswitch and wiring have been checked, test the solenoid for proper function. Use a multimeter to measure the resistance across the solenoid terminals. A typical resistance value should fall within a range suitable for your specific model. If the resistance is outside this range, the solenoid may need replacement.
Step 4: Adjust Settings in the Control Board
If the hardware checks out, it might be necessary to adjust settings on the control board. Sometimes, incorrect settings can cause the solenoid to malfunction. Consult the user manual for your specific WPC model to understand how to adjust these settings.
Troubleshooting Tips
- Keep your machine clean and free of dust and debris.
- Regularly inspect and lubricate moving parts.
- Ensure that all components are properly seated and aligned.
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