LG H990ds Service Manual page 88

3.16.3 Sensor - IRRC
When IRRC is not working check as below.
Checking Flow
START
Yes
Working well?
No
YES
Working well?
No
Check
TP1: 1.8V and
TP2: 2.4V
YES
Output work well?
No
Change main PCB
LGE Internal Use Only
END
TP2
END
END
88
3. TROUBLE SHOOTING
Image
TP1
U8200
Top
Circuit Diagram
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TP2
TP1