LG LG-K430DSF - Page 25

25
Copyright ⓒ 2016 LG Electronics. Inc. All right
reserved. Only training and service purposes
http://eduwebcell.blogspot.com/
3. TROUBLE SHOOTING
3.5 GSM RF PART
3.5.7 Checking GSM PAM DC Power Circuit
Circuit Diagram
Checking Flow
Image
START
Check TP1
+VPWR OK?
NO
The Problem may be
Other part
Check Logic part
YES
Check TP2
1.5V≤TP2≤ 2V?
NO
Check DC-DC Power
Block
Refer to 1.8V
YES
Check Next step
TP1
TP2
Main
Top
TP2
TP1