KX-FT21LA
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3-12. READ SECTION (Refer to page 124 for circuit operation : SCANNING BLOCK)
Are the glass surface of the contact
image sensor (CIS) and the white
panel on the back of the operation
block clean?
Conduct a scanner test in service
mode "555".
Is the LED array lit? Is pin 10 of CN8 on the
digital board at 23 to 24V?
Check the 24V line of the
power supply.
Check R82, J2.
Clean the location in question.
Is pin 3 of CN8 on the digital board
at 4 to 5V ?
NG
OK
NONO
NO
YES
YES
YES
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A
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