Fujitsu F53 Bill Dispenser: Ink Contamination Diagnostic... | terminalfaults.org

Technical Background:

The Fujitsu F53 utilizes 24V DC logic for solenoid activation within the bill dispensing mechanism. Optical sensors detect bill presence and guide the dispensing process. Ink contamination can interfere with optical sensor readings, leading to misfeeds or jams. ESD events in dry, cold environments (-40C) can affect sensor accuracy and solenoid timing. Voltage fluctuations can influence solenoid force and timing, further impacting bill dispensing.

Symptoms:

The Fujitsu F53 bill dispenser is outputting bills with visible ink marks. The reported issue indicates a potential source of ink contamination within the bill handling mechanism.

Possible Causes:

Ink source contamination within the bill storage cassette or dispensing path.
Malfunctioning or misaligned optical sensors due to ink accumulation.
Degradation of bill transport rollers or belts, transferring ink.
Failed cleaning or preventative maintenance, leading to ink buildup.
Voltage spikes or drops affecting solenoid operation and bill separation.
Environmental contamination due to vandalism (intentional ink introduction).

Solution:

1

Initiate a diagnostic cycle using the F53's built-in self-test functions to identify error codes related to sensor malfunction or jams.
2

Using compressed air, carefully clean the bill dispensing pathway, focusing on optical sensors and roller surfaces. Ensure the air source is dry and oil-free.
3

Inspect the bill storage cassette for signs of ink leakage or damage. Replace the cassette if necessary.
4

Examine the bill transport rollers and belts for ink accumulation or wear. Clean or replace as needed.
5

Verify the 24V DC power supply voltage is within the specified range (typically +/- 10%). Use a multimeter to measure voltage under load.
6

If possible, cycle the power to the unit to reset the internal controller and clear any potential software glitches.
7

Document all findings and actions taken for future reference and troubleshooting.

Safety Warning:

The Fujitsu F53 operates on 24V DC power. Before performing any maintenance, ensure the unit is disconnected from the power source. Be aware of potential pinch points within the bill dispensing mechanism. Avoid using excessive force when cleaning or inspecting components. Environmental conditions may include -40C temperatures; use appropriate cold-weather gear.

Prevention:

Implement a routine cleaning schedule for the bill dispensing pathway, including optical sensors and rollers. Use a lint-free cloth and appropriate cleaning solution recommended by Fujitsu. Regularly inspect bill storage cassettes for damage or leakage. Ensure proper ventilation to minimize dust accumulation. Implement a surge protection device on the 24V DC power supply to mitigate voltage spikes. Address environmental vandalism by increasing surveillance or implementing physical barriers.

Expert Tip:

Check the event logs stored within the F53's controller. These logs often contain detailed information about error codes, sensor readings, and dispensing cycles leading up to the ink contamination issue. This data can help pinpoint the root cause and guide troubleshooting efforts.

Frequently Asked Questions

•What is the recommended cleaning solution for the F53's optical sensors?

Use isopropyl alcohol (90% or higher) applied with a lint-free swab. Avoid using abrasive cleaners.

•How can I access the F53's event logs?

Refer to the Fujitsu F53 service manual for instructions on accessing the event logs through the diagnostic interface.

•What are the torque specifications for mounting screws on the F53's bill storage cassette?

Refer to the Fujitsu F53 service manual for torque specifications. Overtightening can damage the cassette and cause malfunction.

Fujitsu F53 Bill Dispenser: Ink Contamination Diagnostic Report

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the recommended cleaning solution for the F53's optical sensors?

•How can I access the F53's event logs?

•What are the torque specifications for mounting screws on the F53's bill storage cassette?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: