Sensor Section - Panasonic KX-F900 Service Manual

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3-11. SENSOR SECTION
(1) Check the read position sensor(PI301)
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Check the voltage at pin 15 of IC301
Document set OV -L--When
the pin
No document 4-5V !-_ 16 of IC301 is
low level.
OK
Replace IC301,
J
N__2%,.
Check the soldering at R333.
(2) Check the document sensor (PI302)
I
Check the voltage at pin 15 of IC301
Document set 4~5V -_---When the pin
No document OV --9 of IC301 is
low level.
OK
Replace IC301.
I
--_ Check the at R333. ]OK
soldering
I
q
Check the soldering /
at R331.
/
Replace PI301.
v
I
Check the soldering
at R332.
Replace PI302.
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m
'-r.
0
0
,-4
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Q
C
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(3) Check the cover open sensor(SW271)
Check the voltage at pin 31 of IC151 _ Check the soldering at R271.
Open cover: 4~5V
/
Close cover: 0V
OK
ReplaceIC151.
J
Check the soldering
at R272
OK
ReplaceSW271.
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