LG GX / SPN5-W User Manual

3-8
Copyright © 2020 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ONE POINT REPAIR GUIDE
2. NO SOUND
2-1. BLUETOOTH
2-1-1. Solution
Replace MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Please check status of Bluetooth cable connection. (at CN202 and BT module)
2) Please check 3.3 VA (at pin1, 2 of CN202).
If 3.3 VA is OK, please check USB_DP_P2, BT_RST, BT_WAKEUP, BT_STBY (pin6, 10, 11, 12).
If no signal, please replace MAIN board.
2-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
C269
100nF
R252 4.7
R244 100
C274
10pF
NC
R251 4.7
TP245
C272
100pF
C273
10pF
NC
TP246
3.3VA
BT_WAKEUP
TP247
FB201
TP248
CN202
1
3.3VA
2
3.3VA
3
NC
4
GND
5
GND
6
USB_DP
7
USB_DN
8
GND
9
GND
10
RESET
11
BT_WAKEUP
12
GPIO
TP249
BT_RST
TP244
DGND
TP250
R253
15K
NC
R243 100
R242 1K
C270
100nF
USB_DM_P2
C271
100pF
C268
100nF
USB_DP_P2
ZD202
1
2
3
FL205
90ohm,150mA, DCR1.4ohm
1
23
4
BT_STBY
C267
10uF
R254
15K
NC
ZD203
1
N
2
C
3
A
FFC 0.5mm Pitch
Angle,Lock,SMD
Bluetooth
CN202
CN202
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LG GX / SPN5-W Specifications

General

Brand	LG
Model	GX / SPN5-W
Category	Speaker System
Language	English