22 IBM 4685-K03 Installation, Operation and Maintenance Guide
Symptom Causes and actions
The MSR is unable to read
cards.
Cause 1
Action 1
Cause 2
Action 2
Action 3
There MSR reading head needs to be cleaned.
Clean the MSR reading head by using the MSR cleaning card in the
hardware service kit (P/N: 48G9045).
The MSR or the control card has a problem.
Check if the MSR is functional using the diagnostic program or the
self-diagnostic test. See “Diagnostic test” on page 20 for more
information.
If the condition is still unchanged by Action 2, replace the MSR or the
control card.
The keyboard cannot be
switched to the online
mode.
Cause
Action
The keyboard has problems or the OS settings are incorrect.
a. Check that the keyboard is recognized by the diagnostic program.
See “Diagnostic test” on page 20 for more information.
b. Make sure the keyboard type settings for the OS are valid. See the
OS documentation for more information.
The mode key is lost. Contact your dealer or IBM service representative.
If your problems are not resolved by these procedures, please contact an IBM service engineer.
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Diagnostic tests There are two types of diagnostic tests for 4685-K03. The testing method is different depending on POS terminals
connected to the keyboard.
1. Self-diagnostic tests
2. 4800 Diagnostic program
For more about the 4800 Diagnostic program, please see the manual. The manual is available at:
z http://www.ibm.com/jp/store/
z http://www.pc.ibm.com/store/
Self-diagnostic tests are available for checking the functions of the keyboard. During the diagnostic tests, the
keyboard has power, but cannot communicate with the terminal. The self-diagnostic tests can be activated at any
time, unless the mode key position is “Inactive”.
How to enter the self-diagnostic tests
To enter the self-diagnostic tests:
1. Within 2 seconds after turning the power on, press the top left key twice.
2. The keyboard should respond with six beeps, with the frequency increasing from low to high.
3. After one more beep, the keyboard is ready for the self-diagnostic tests.