LG 50PK950-SA (CHASSIS:PB01A) Service Manual ▷ View online
Customer Oriented R&D
Breakthrough
P
O
w
E
R
B
O
A
R
D
R
D
P_+5V
IC503
(DCDC)
D1.2V
IC401,402,403,404
(DDR3)
IC100
BCM3556
GP2 BRAZIL BCM 전원계통 (05.06)
+5V_ST
IC901
(RGB EEPROM)
D1.8V
L500
L510
A1.2V
IC506
(LDO)
(LDO)
L502
+3.3V_ST
+3.3V_NEC_ST
L503
IC701
NEC MICOM
IC14
NEC MICOM EEPROM
IC501
(DCDC)
+1.8V_HDMI
L800
IC800
HDMI S/W
IC504
(DCDC)
A3.3V
L514
D3.3V
IC601(LDO)
+3.3V_DE
+1.2V_DE
L703
L702
+3.3V_AU_AVDD
+3.3V_DVDD
IC700
AUDIO AMP
TU600
DEMOD
L801
+3.3V_HDMI
IC800(HDMI S/W)
IC500(NAND Flash)
IC102(NVRAM)
TU600(TUNER)
IR / SPDIF / Bluetooth
IC1000(NAND GATE)
IC1100(USB HUB)
IC502(LDO)
D2.5V
L504
Ethernet
D1.2V
D1.8V
D3.3V
+5V_TU
P_17V
L505
IC700
AUDIO AMP
IC505
(DCDC)
L511
TU600(TUNER)
L704
+17V_AMP
L1201
Q1201(FET)
P_17V_WIRELESS
Wireless
P_17V
P_17V
L1110
IC1101
(USB OCP IC)
IC1102
(USB OCP IC)
L501
Customer Oriented R&D
Breakthrough
1.
Power-Up Boot Fail Trouble Shooting
2.
No OSD Trouble Shooting
3.
Digital TV Video Trouble Shooting
4.
Analog TV Video Trouble Shooting
5.
Component Video Trouble Shooting
6.
RGB Video Trouble Shooting
7.
AV Video Trouble Shooting
8.
HDMI Video Trouble Shooting
9.
All Source Audio Trouble Shooting
10.
Digital TV Audio Trouble Shooting
11.
Analog TV Audio Trouble Shooting
12.
Component / RGB / AV Audio Trouble Shooting
13.
HDMI Audio Trouble Shooting
14.
USB Trouble Shooting
15.
Digital TV Recording Fail Trouble Shooting
16.
Analog TV Recording Fail Trouble Shooting
17.
AV Video Recording Fail Trouble Shooting
18.
Digital TV Video Trouble Shooting while recording (Watch & Record)
19.
Digital TV Audio Trouble Shooting while recording (Watch & Record)
20.
Analog TV Video Trouble Shooting while recording (Watch & Record)
21.
Analog TV Audio Trouble Shooting while recording (Watch & Record)
Trouble Shooting Guide for LG Service Man
Please check system, after power Off/On one time
Customer Oriented R&D
Breakthrough
1. Power-Up Boot Fail Trouble Shooting
Replace Power board
N
Y
Check Micom Redownload or
replace
Check P500 All Voltage Level
(17V, 5V, 3.3V, 5V_ST)
Check Power connector
Y
Check Voltage Level 3.3V at L514
N
Replace one of IC504IC500/ L502 /
L514 & Recheck
Y
N
Check Voltage Level 2.5V at L504
N
Replace one of IC502/L504
& Recheck
N
Y
Check Voltage Level 1.8V
at L503
N
Replace one of IC501/L503
& Recheck
N
Y
Check Voltage Level 1.2V at L510
N
Replace one of IC503/L510
& Recheck
N
Y
Check X200 Clock 54MHz
N
Replace X200
Y
Check signal transition
at IC500 #9 pin
N
Maybe BCM3556 has troubles
Replace IC500 Flash Memory
Y
Check All Voltage Level
at Bead
N
Replace one of Bead
& Recheck
Y
Customer Oriented R&D
Breakthrough
2. No OSD Trouble Shooting
DDR2
512MB(128*4)
DDR2
512MB(128*4)
BCM3556
(400M MIPS)
BCM3556
(400M MIPS)
1080P
LVDS
(Front-end)
(External Input)
EXT_IN
HDMI0_BCM
CVBS_LIVE
TP1
CVBS_LIVE
SIF1
SIF1
Cab
le
ISDB-T/
PAL/NTSC
(System + DVR + Scalar)
IF
I2S_BCM
TAS9709
TAS9709
AV1
AV1_LR
COMP1_LR
COMP2_LR
RGB_LR EXT_IN
HDMI0_BCM
AV2
AV2_LR
NANDFlash
512MB
NANDFlash
512MB
(Audio Out)
USB2.0
SPDIF
SIF_LIVE
I2S_BCM
TDA9996
TDA9996
(Comp1/2, RGB)
HDMI3
HDMI1
HDMI2
SIDE HDMI_PORT
UI_HW_PORT1
UI_HW_PORT2
LAN
HUB
(PK950)
PK550
BT Module
PK950
(USB)
Demodulator
MN884433
TP1
HDMI2
UI_HW_PORT3
LAN
(LAN)
HDMI
(Wireless)
Wireless
RX Box
PHY
PHY
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