LG 26LH2000 Service Manual

THE    SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE    SYMBOL MARK OF THE SCHEMETIC.
POWERPANEL_POWER
+5V_ST +3.3V_ST+12V/+15V
PANEL_CTL 1:AK10
+3.3V_AVDD_MPLL
+3.3V_ST Q805
2SC3052
E
B
C
Q804
2SC3052
E
B
C
L803
BLM18PG121SN1D
C803
0.1uF
16V C808
0.1uF
16V +5V_GENERAL
+5V_USB_SIDE
+12V/+15V...

THE    SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE    SYMBOL MARK OF THE SCHEMETIC.
SCARTGND
C1103
330pF
50V
SCART1_DET
C1124330pF 50V SC2_ID
SC1_G SC1_CVBS_IN
SC1_R_IN2:S14 C1123
330pF
50V
SC1_ID
2:E16 REC_8
SC1_B SC1_L_IN
C1108
220pF
50V
OPT
SC2_L_INSC2_R_IN
SC1_FB
C1107
100uF 16V...

THE    SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE    SYMBOL MARK OF THE SCHEMETIC.
TUNERFE_TS_DATA[5] FE_TS_DATA[6]
FE_TS_DATA[1]
FE_TS_DATA[0]
FE_TS_DATA[3] FE_TS_CLK
FE_TS_DATA[2] FE_TS_DATA[4] FE_TS_SYN
FE_TS_DATA[7]
FE_TS_VAL +5V_GENERAL
+3.3V_TUNER +5V_GENERAL
FE_BOOSTER_CTL
/FE_RESET...

THE    SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE    SYMBOL MARK OF THE SCHEMETIC.
LVB_3MLVB_0M
LVB_1P LVB_2M
LVB_CKP LVB_CKM
LVB_4P LVB_0P
LVB_2P
PANEL_POWER
LVB_1M
LVB_4M LVB_3P
+3.3VSDA_SUB/AMP
IR +5V_ST
SCL_SUB/AMP
KEY1
KEY2 +3.3V_ST
LED_ON/LED_R R1318
100
R1317
100
C1314
0.1uF16V
C1305...

 Block Diagram Block Diagram
RGB COMPONENT
F-SCART
AV3
BUF_TS_CLK/ERR/SYN/DATA[0]
AV_CVBS_IN
DDR2 SDRAM
(1Gb)
IC300NAND Flash
HYNIX
IC102
USB
Digital amp
(NTP3100L)
IC701 COMP_Y/Pb/Pr
      SC1_CVBS_IN
SC2_CVBS_IN
I2S DSUB_ R/G/B
Tuner 
(TDFW-G235D1)
TU1000
LCD Panel
- 19/22/26/32/37/42LH2000
- 32/37/42/47LH3000
- 32/37/42/47LH4000
74LVC541A
Buffer
IC502
CI Slot
 (P500)
74LCX244
Buffer
IC501
PCM_A[0:7]
FE_VMAIN
PCM_A[0:7]SDDR_D[0:15]
DDR2 SDRAM
(512Mb)
IC301
TDDR_D[0:15]SDDR_A[0:12]
Mstar S6LGE3368A...

37 GIP Block Diagram37 GIP Block Diagram
TCON with FRC
MST7327N
IC101
M+S T-Con Block
SPI_CZ/CK & DI/DODDR_A_D[0:15]
DDR2 SDRAM
(512MB / 533MHz)
HYNIX
IC201
DDR_B_D[16:31]DDR_A_A[0:12]
DDR_B_A[0:12]
Serial Flash
W25X32VSSIG
IC102DDR2 SDRAM
(512MB / 533MHz)
HYNIX
IC202
Multi Channel 
DC/DC Converter
TPS 65161
IC401
P-Gamma IC 
BUF16821
IC402
VCC
VDD
VGH
VGL
VCC VDD
Level Shifter
MAX17108
IC403
GVST
GVDD_EVEN
GVDD_ODD
GCLK1~6
VGH
VGL
VGH
VDD
SOE
POL
Left mini-LVDS (8Bit)Right mini-LVDS (8Bit) LVDS (10Bit)...

42/47 Normal Block Diagram42/47 Normal Block Diagram
TCON with FRC
MST7327N
IC101
SPI_CZ/CK & DI/DODDR_A_D[0:15]
DDR2 SDRAM
(512MB / 533MHz)
HYNIX
IC201
DDR_B_D[16:31]DDR_A_A[0:12]
DDR_B_A[0:12]
Serial Flash
W25X32VSSIG
IC102DDR2 SDRAM
(512MB / 533MHz)
HYNIX
IC202
Multi Channel 
DC/DC Converter
TPS 65162
IC401
P-Gamma IC 
BUF16821
IC402
VCC
VDD
VGL
VCC VDD
GSP
GSC
GOE
SOE
POL
VCOMGAMMA
DC/DC Converter
BD9130
IC301
LDO
SC4215
IC303
FRC_1.8V FRC_1.26V
FRC_3.3V
VCC
VGHM
Left mini-LVDS (8Bit)
Right...

Contents of LCD TV Standard Repair Process
No.
Error symptom (High category)
Error symptom (Mid category)
Page
Remarks
1
A. Video errorNo video/Normal audio 1
2 No video/No audio 2
3 Video error, video lag/stop 3
4 Color error 4
5Vertical/Horizontal bar, residual image,
light spot, external device color error5
6
B. Power errorNo power 6
7Off when on, off while viewing, power auto
on/off7
8
C. Audio errorNo audio/Normal video 8
9 Wrecked audio/discontinuation/noise 9
10
D. Function errorNo response in...

Normal 
audioY
N
Move to No
video/No audio
No video
Normal audio
Check Back Light
On with naked eye
OnY
N
Check Power
Board
12v,5v  etc.
Normal 
voltageY
N
Replace Main BoardReplace T-con
Board or module
And Adjust VCOM OR
Repair Power
Board or parts
Check Power Board 20V /12V or 24v output
Normal
voltageY
Replace Inverter
or module
N
Repair Power
Board or parts
End
Always check & record S/W Version and White
Balance value before replacing the Main Board
Replace Main Board 
 Re-enter White Balance value...