IBM 4685-K03 ユーザーズマニュアル

This section is provided for the maintainer of the IBM 4685-K03 POS keyboard. 

 

 

Be sure to read “Safety instructions” on page  ⅴ  and “Safety inspection guide” on page  ⅶ 
before working on this product. 

_________________________________________________________________________________________ 

This section explains how to handle problems encountered when using the IBM 4685-K03 keyboard. 

 

There is no response to 
any of the keyboard keys. 

Status of the mode key is “Inactive”. 
Select a mode other than “Inactive”. See “Mode switch” on page 13 for 
more information. 
The setup for the operating system (OS) had problems. 
Confirm the validity of the keyboard type as set up for the OS. Check 
the OS documentation for more information. 
The keyboard cable, the top cover assembly, or the control card for 
the keyboard has problems. 
Replace the keyboard cable, then the top cover assembly, and then 
the control card (until the faulty part is identified). 

There is no response to 
one or several keyboard 
keys. 

The key cap, the top cover assembly or the control card has troubles. 
a. Identify the disabled keys by using the diagnostic program or the 

self-diagnostic test. See “Diagnostic tests” on page 20 for more 
information. 

b. Replace the key, the unused key cover over the non-functioning 

keys, or the control card.  For more about replacing keys, see 
Chapter 4 “Replacing a single key” on page 13. For more about 
replacing unused key covers, see “Replacing an unused key cover” 
on page 18. 

The mode cannot be 
changed with a mode key. 

The mode key or the control card has problems. 
Check the status of the mode key switches using the diagnostic 
program or the self-diagnostic test. See “Diagnostic tests” on page 20 
for more information. 
If the status is still unchanged by Action 1, replace the mode key or the 
control card. 

 

Chapter 5 Maintenance of the keyboard      21