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lg-d821
LG lg-d821 User Manual
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3.
TROUBLE
SHO
O
TING
- 162
-
Copy
right ©
2013 L
G Electro
nics.
Inc. A
ll righ
t rese
rved.
Only f
or tr
aining
and service
purposes
L
GE Int
ernal U
se Only
3.12
V
ibr
at
or
T
rou
bles
hoot
ing
Check
out th
e sett
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enu on
the p
hone
. If not
, che
ck
T
est p
oints
show
n on t
he pictu
res
.
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es
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es
ST
ART
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es
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No
Is
the
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rc
uit
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were
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Vi
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at
or
wo
rks
Che
ck
TP
1,
2
TP1
100
1
Cha
nge
The
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oar
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run
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F
ollo
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ow
er O
N
tro
uble
sh
ooti
ng
161
163
Table of Contents
Default Chapter
2
Table of Contents
2
1 Introduction
3
Purpose
3
Regulatory Information
3
2 Performance
5
Product Name
5
Supporting Standard
5
Main Parts & Solution
6
HW Features
6
SW Features
9
Hw Spec
12
LG-D821 Figures
29
3 Trouble Shooting
30
RF Component
30
Signal Path
33
Checking XO Block
37
Checking RF Front-End Separator
40
Checking RF Block
43
Checking Rf Tx Level
44
GPS Trouble Shooting
122
WIFI/BT Trouble Shooting
128
Audio Troubleshooting
133
Speaker Module
134
Receiver Troubleshooting
136
Camera
150
Main LCD Trouble
156
Touch Trouble Shooting
160
Vibrator Troubleshooting
162
Gyro/Accel Sensor Troubleshooting
165
Compass Sensor Troubleshooting
167
Barometer Sensor Troubleshooting (Pressure Sensor )
169
Proximity Sensor On/Off Troubleshooting
171
Light Sensor On/Off Trouble
173
Nfc
175
Power on Troubleshooting
178
Wireless Charging Troubleshooting
182
USB Trouble Shooting
185
HDMI Troubleshooting
188
4 Download
192
5 Block Diagram
209
6 Circuit Diagram
223
Fuel Gauge
230
Volume Key
233
Power Key
233
Wireless Charging
237
7 Bga Pin Map
238
8 Pcb Layout
246
9 Calibration
252
10 Disassemble Guide
271
11 Exploded View & Replacement Part List
281
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LG lg-d821 Specifications
General
Brand
LG
Model
lg-d821
Category
Cell Phone
Language
English
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