LG LG-D855 - Page 111

3. TROUBLE SHOOTING
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START
No
No
Check next step
Check TP1 +1V8_VREG OK?
Check TP2
0.5V≤TP2≤4.2V?
The Problem may be Other part
Check Logic part
Check DC-DC Power Block
Refer to 3.3
Yes
Yes
ACPM-9307-TR1
U1601
6
5
7
4
8
3
9 2
10
1
11
PGND
VCC1
VCC2
RFINRFOUT
VBAT
NC
VIO
GND
SDTA
SCLK
VREG_BOOST_BYPASS
+VPA0
C185110n
C1615 2.2u
+1V8_VREG_S3A
4.7uC1616
C1614 2.2u
RFFE1_CLK
RFFE1_DATA
TP2
TP1