Cf4(Ih Rr Top Sensor Error) Open / Short - LG LSE4617ST Service Manual

CHECKING FLOW CHART BY FAILURE
Symptom
CF4(IH RR Top Sensor Error)
Open / Short
1. OPEN
Is the CN93
disconnected or loose
Connection?
1. Sensor
Is the R919 disconnected?
Replace The PCB
1. Check the Top Sensor Connect
2. Check The Top Sensor Resistance
Reconnect
Yes
or adjust the
connection
No
No
Check Point
2. SHORT
Is the CN93 normal?
Measure the resistance
Normal : infinite
Abnormal : shorted
Is the resistance of
R919 normal?
Normal- approximately 1kΩ
Replace The PCB
9-25
No
Replace
The PCB
Yes
No