LG 55LV5400 (CHASSIS:LA12E) Service Manual ▷ View online
16. Trouble shooting - USB connection error
Check USB 2.0 Cable
N
Check USB jack
(JK1201 or JK1202)
Y
N
N
Check USB device
If device is 2.5 inch HDD,
Check power adaptor
Replace Jack
Check 5V voltage level at Bead or Jack
Y
Replace one of
IC1203 or IC1204 and then check
N
Maybe BCM35230(IC101)
has problems. Replace It.
• Exception
- USB power could be disabled by inrushing current
- In this case, remove the device and try to reboot the TV (AC power off/on)
17. Trouble shooting - Ethernet connection error
Replace one of L1401
& Recheck
N
Check LAN Port Power
L1401
Y
Check LAN Port LED
N
Replace one of LAN Port
& Recheck
Y
Maybe BCM35230 LAN PHY block
has problems. Replace It
N
Check LAN Cable
Recheck
LAN Cable
N
Y
Check MAC Address
Replace
Main B/D
N
18. Trouble shooting - Wireless media box - connection error
Check input Wireless media box & dongle
Check wireless Cable conductors
for damage or open conductor
Check JK1001
Soldering state
Check L1001 24V
ok
ok
ok
No
No
Replace Jack
ok
Check power board
Check Wireless _DET
Check R1007 3.3V
Replace Jack
3.3V
Replace BCM( IC101)
or Main Board.
High
19. Trouble shooting - Tool option
Push the ADJ ( with the Factory SVC Remocon)
Check the Tool Option 2
N
Y
Y
Check the Tool Option 1
Correct the Tool Option1 ( using reference file ( GP3_BCM_TOOL OPTION))
Check the Tool Option 3
Y
Check the Tool Option 4
Y
Check the Tool Option 5
N
Correct the Tool Option2 ( using reference file ( GP3_BCM_TOOL OPTION))
N
Correct the Tool Option3 ( using reference file ( GP3_BCM_TOOL OPTION))
N
Correct the Tool Option4 ( using reference file ( GP3_BCM_TOOL OPTION))
N
Correct the Tool Option5 ( using reference file ( GP3_BCM_TOOL OPTION))
Reference file :
Y
Check the Tool Option 6
N
Correct the Tool Option5 ( using reference file ( GP3_BCM_TOOL OPTION))
GP3_Tool option
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