LG 50PX950-SA (CHASSIS:PB01B) Service Manual ▷ View online
Customer Oriented R&D
MAIN B/D
3D Formatte
r FPGA(EP3C55
)
IC4006
(LDO)
IC4005
(LDO)
IC4008
(LDO)
+5V
2.5V_IO
BANK 1
BANK 2
BANK 5
BANK 6
BANK 7
BANK 8
BANK 2
BANK 5
BANK 6
BANK 7
BANK 8
1.2V_CORE
IC4004
(REG)
1.8V_DDR
DDR_VTT
DDR_VREF0
DDR_VREF0
BANK 3
BANK 4
BANK 4
POW
E
R B/
D
600mA Typ
200mA Typ
600mA Typ
3D Total : 1250mA + α(2D to 3D)
IR
emitter
50mA Typ
1000mA Max
P_+ 5V Spec : 3A Typ (5A Max)
P_+5V
Main Total : 1250mA
BCM3556
+5V_ST
P_+17V
Q501
(TR)
IC503
(LDO)
IC505
(LDO)
USB
+5V_MULTI
+5V_USB
+5V_MULTI
A2.5V
D3.3V
A3.3V
Tuner
+3.3V_MULTI
Flash
EEPROM
Ethernet
/ 500mA
/ 100mA
/ 180mA
/ 470mA
1250mA
1200mA
2500mA +
α
외부 입력을 통한 전류
* USB HDD : 400mA
( 초기 HDD initialize 시 800mA )
* LAN 40mA
* Wireless 50mA
◈ 결론
Max typ 전류
: 2990 mA
Max Inrush 전류 : 4340 mA
(HDMI 입력 모드에서 3D 구동 후
HDD,Lan,wireless 연결 시)
HDD,Lan,wireless 연결 시)
HDD , IR emitter 의 inrush
current 와 +
current 와 +
α
(2D to 3D) 전류 고
려 필요함.
◈
+5V_ST / P_+17 은 GP2 대비 동일
IC402
(DCDC)
1200mA Typ
1250mA Typ
3V3
3DF Power Tree
(PDP 3DTV)
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
AV2
AV2_LR
NANDFlash
512MB
NANDFlash
512MB
(Audio Out)
USB2.0
SPDIF
SIF_LIVE
I2S_BCM
(Comp1/2, RGB)
LAN
HUB
(PK950)
PK550
BT Module
PK950
(USB)
Demodulator
MN884433
TP1
LAN
(LAN)
HDMI
(Wireless)
Wireless
RX Box
PHY
PHY
HDMI0_BCM
TDA9996
TDA9996
HDMI_D
HDMI_A
HDMI_B
SIDE HDMI_PORT
UI_HW_PORT1
UI_HW_PORT2
HDMI_C
UI_HW_PORT3
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