ICD-ST25 - Sony Audio Service Manual (repair manual). Page 11

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11
ICD-ST25
11. Key durable test
• Pressing the  x
B  key makes the count to "------" and sets test
standby status.
Once more pressing the  x
B  key makes the count to "000000"
and sets the key durable test.
In this mode any key input and slide switch operation are counted
and the number is displayed.
Turn off the power to exit this mode.
KEY
COUNT 
KEY
------
KEY
000000
KEY
000001
x
Key durable
test
any keys or slide 
switches operation
x B
x B
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