Cf5(Ih Left Igbt Sensor Error) Open / Short - LG LSE4617ST Service Manual

CHECKING FLOW CHART BY FAILURE
Symptom
CF5(IH Left IGBT Sensor
Error)
Open / Short
1. OPEN
Is the TH91 and TH92
disconnected?
1. Sensor
No
Is the R921
disconnected?
1. Check the Top Sensor Connect
2. Check The Top Sensor Resistance
Yes
Replace
The PCB
No
Replace
The PCB
9-26
Check Point
2. SHORT
Is the TH91 and TH92
normal?
Measure the resistance.
Normal : 18kΩ~28kΩ
Abnormal : Over 28kΩ
(Open)
Under 1Ω
(Short)
No
Replace The PCB
Is the R901 and R912
normal?
Measure the resistance
Normal : 14kΩ~50kΩ
Abnormal : Over 50kΩ
(Open)
Under 1Ω
(Short)
No
Replace The PCB