ICT L70 Bill Acceptor: Transaction Report Failure... | terminalfaults.org

Technical Background:

The L70 communicates transaction data via a serial interface (RS-232 or similar) at a specified baud rate (e.g., 9600 bps). The bill acceptor utilizes optical sensors and inductive sensors to validate bill denomination and authenticity. Voltage fluctuations (+/- 5%) on the 24V DC supply line can disrupt sensor readings or communication. Electrostatic discharge (ESD) can damage the communication IC. Signal attenuation or noise on the communication lines can prevent accurate data transmission.

Symptoms:

The ICT L70 bill acceptor is physically accepting bills. However, the transaction data is not being logged or transmitted to the host system, resulting in a failed transaction report.

Possible Causes:

Faulty serial communication cable or loose connection preventing data transmission to the host system.
Incorrect baud rate or communication protocol settings configured on the L70 or the host system.
A damaged or malfunctioning communication IC (e.g., UART) within the L70.
Contamination or damage to optical sensors inside the bill path affecting bill validation and transaction logging.
Software or firmware error within the L70 preventing proper transaction reporting.
Insufficient or unstable 24V DC power supply leading to intermittent sensor or communication failures.

Solution:

1

Verify the 24V DC power supply is within the specified range (typically 22.8V DC to 25.2V DC) using a multimeter. Check the power supply for any signs of physical damage or corrosion.
2

Inspect the serial communication cable (RS-232 or equivalent) for damage, kinks, or loose connections at both the L70 and the host system. Replace the cable if necessary.
3

Use a serial port analyzer or a terminal program (e.g., PuTTY) to monitor the communication between the L70 and the host system. Confirm that data is being transmitted and that the baud rate and protocol settings are correct.
4

Clean the optical sensors inside the bill path using compressed air and a lint-free cloth. Avoid using solvents that could damage the sensors.
5

Check the L70's configuration settings (via dip switches or software) to ensure that the correct baud rate, parity, and data bits are selected to match the host system's requirements.
6

Consult the ICT L70 service manual for instructions on performing a self-test or diagnostic routine to identify any internal hardware or software errors.
7

Contact ICT technical support for assistance with firmware updates or advanced troubleshooting if the problem persists.

Safety Warning:

The ICT L70 operates on 24V DC. Ensure the power supply is disconnected before performing any maintenance or troubleshooting. Follow proper Safe Handling procedures by unplugging the device and ensuring a dry work surface.

Prevention:

Regularly clean the bill path and optical sensors inside the L70 to prevent the accumulation of dust and debris. Ensure proper cable management to prevent strain or damage to the communication and power cables. Implement a surge protection system to protect the L70 from voltage spikes and ESD. Inspect and tighten all connectors periodically.

Expert Tip:

Some ICT L70 models have a hidden diagnostic menu accessible by holding down a specific button combination during power-up. Consult the service manual or contact ICT support for instructions. Monitor the voltage levels on the communication lines using an oscilloscope to detect any signal noise or attenuation.

Frequently Asked Questions

•What are the default communication settings for the ICT L70?

The default settings usually involve a standard baud rate like 9600 or 19200, 8 data bits, no parity, and 1 stop bit (8N1). Refer to the device manual for confirmation.

•How do I access the diagnostic menu on the ICT L70?

The diagnostic menu access varies by model. Consult the specific ICT L70 service manual or contact ICT technical support for detailed instructions.

•What type of serial cable is required for the ICT L70?

The ICT L70 typically uses a standard RS-232 serial cable with a DB9 connector. Confirm the specific pinout and wiring requirements in the device's manual.

ICT L70 Bill Acceptor: Transaction Report Failure Diagnosis

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What are the default communication settings for the ICT L70?

•How do I access the diagnostic menu on the ICT L70?

•What type of serial cable is required for the ICT L70?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: