G-13 Coin Acceptance Mechanism Cycling Troubleshooting -... | terminalfaults.org

Technical Background:

The coin acceptance mechanism relies on a combination of inductive sensors and optical encoders to identify and validate coin denominations. The 24V DC logic controls solenoid activation for coin routing. A failure in any sensor, encoder, or solenoid driver circuit can lead to continuous cycling as the system attempts to validate a non-existent coin or clear a perceived jam. Signal attenuation due to corrosion on connectors may affect sensor readings.

Symptoms:

The G-13 coin acceptance mechanism is continuously cycling without valid coin insertion. This indicates a fault in the coin recognition or validation sequence.

Possible Causes:

Obstructed coin path: Foreign objects (debris, dirt, or damaged coins) blocking the coin path prevent the mechanism from completing its cycle.
Faulty coin sensor: Defective inductive or optical sensors providing incorrect or no signal regarding coin presence or denomination.
Sticking solenoid: A solenoid responsible for coin routing may be stuck in an active state, preventing proper coin acceptance and causing continuous cycling.
Damaged wiring harness: Breaks or shorts in the wiring harness connecting the coin mechanism to the control board can disrupt sensor signals and solenoid operation.
Contaminated optical encoder: Accumulation of dust or debris on the optical encoder disc leading to incorrect position detection and continuous cycling.
Power supply voltage fluctuation: Unstable 24V DC power supply causing erratic solenoid or sensor behaviour.

Solution:

1

Visually inspect the coin entry and exit points for any visible obstructions (debris, damaged coins).
2

Use compressed air to gently blow out any loose debris from the coin path. Do not use excessive pressure.
3

Inspect the wiring harness connecting the coin mechanism to the main control board for any signs of damage (frayed wires, loose connections).
4

Check the 24V DC power supply voltage using a multimeter to ensure it is within the specified range (typically +/- 5%).
5

Cycle power to the G-13 system (unplug, wait 30 seconds, replug). This may reset the system and clear any temporary errors.
6

Consult the G-13 service manual for diagnostic routines or error codes related to coin acceptance.
7

If the problem persists, contact a qualified technician for further diagnostics and component-level repair.

Safety Warning:

The G-13 coin mechanism operates on 24V DC. While this voltage is generally considered low-voltage, exercise caution when working with electrical components. Always disconnect power to the system before performing any maintenance or troubleshooting. Be aware of sharp edges inside the mechanism when inspecting the coin path. Ensure the area around the kiosk is clear of obstructions to prevent tripping hazards during maintenance.

Prevention:

Regularly inspect and clean the coin acceptance mechanism (every 3-6 months) to prevent the accumulation of debris. Ensure the wiring harness is properly secured to prevent strain on the connectors. Implement a scheduled preventative maintenance program that checks voltage levels, sensor functionality and cleans the optical encoder.

Expert Tip:

Check the connector pins on the coin mechanism and main control board for corrosion. Use a contact cleaner specifically designed for electronic components to clean any corroded pins. A small amount of dielectric grease can be applied to the connectors after cleaning to prevent future corrosion.

Frequently Asked Questions

•What type of cleaner should I use for the coin mechanism?

Use a dry, non-abrasive cloth or compressed air. Avoid using liquid cleaners that could damage the sensors or electronics.

•Where can I find the G-13 service manual?

Contact the original manufacturer or distributor of the G-13 for service manual availability.

•How often should I clean the coin mechanism?

Cleaning frequency depends on usage and environmental factors, but typically every 3-6 months is recommended.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What type of cleaner should I use for the coin mechanism?

•Where can I find the G-13 service manual?

•How often should I clean the coin mechanism?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: