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Note 6) Check
read section
r
l
Is the glass surface of reading section
clean?
I YES
Perform the scanner test.
LED lamp of the read section light?
I
YES
[Continued to "3. I
NG
[
Is the voltage at pin 4 or IC401 4~5V?
YES
Is the voltage at
base of Q401
0.6~0.7 V?
YES
Is the voltage at
Icollector of Q401.
0V?
!l YES
Check the
pattern between
Q401 and CN406.
NO
NO
I
1
Replace IC401.
1
Check the solder of
R411,R412.
Replace Q401.
J
Clean the surface of the glass.
I
Copy a document.
1o_
END
J
NG
Check the connection between CN406
and LED lamp.
I
1°K
Is the voltage at pin 1 of CN406
+24 V?
Replace LED lamp.
l
I
i
I
Repair the connection.
I
I
-51 -
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