Panasonic KX-F900 Service Manual page 78

KX-Fg00 1
(4) Check the recording paper sensor (SW273)
Check the voltage at pin 6 of IC151
Present recording paper: 0V
Out of recording paper: 4-5V
OK
Replace IC151.
-_ Check the soldering at R275. _ Check the soldering at R276. I
OK
_r
Replace SW273.
(5) Check the jam sensor (SW272)
Check the voltage at pin 7 of IC151
jam: 0V
No jam: 4-5V
OK
Replace IC151.
-_ Check the soldering at R273.
_,_ Check the soldering at R274.
OK
Replace SW272.
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