DOWNLOAD LG 19LD330 / 19LD340 / 19LD345 (CHASSIS:LP91H) Service Manual ↓ Size: 2.72 MB | Pages: 27 in PDF or view online for FREE

Model
19LD330 19LD340 19LD345 (CHASSIS:LP91H)
Pages
27
Size
2.72 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
19ld330-19ld340-19ld345-chassis-lp91h.pdf
Date
PREV: LG 19LD320 / 19LD320N (CHASSIS:LD91A) Service Manual

LG 19LD330 / 19LD340 / 19LD345 (CHASSIS:LP91H) Service Manual ▷ View online

- 13 -
TROUBLESHOOTING
No power
(LED indicator off)
Check 24V, 12V, 3.5V 
of Power B/D.
Check short of Main B/D 
or Change Power B/D.
Pass
Check Output of 
IC1001, IC1005, IC1007.
Check P307 Connector 
Change LED Assy. 
:  [A] PROCESS
Fail
Fail
Pass
Pass
Check LED Assy. 
Change IC1002, IC1008, Q1003
Pass
Check short of IC1001,
IC1005, IC1007.
Fail
Re-soldering or Change defect
part of IC1001, IC1005, IC1007
Fail
No Raster
[B]: Process
Check LED status
On Display Unit.
Repeat A PROCESS.
Pass
Fail
Check Output of IC802.
Change IC802.
Fail
Change Inverter Connector
or Inverter.
Fail
Pass
Fail
Pass
Change LVDS cable.
Fail
Check LVDS Cable.
Pass
Check Panel Link Cable 
or Module.
Change Panel Link Cable
or Module.
Check Inverter Connector
or Inverter.
Pass
- 14 -
No Raster on PC Signal
Check Input source Cable
and Jack.
Pass
Re-soldering or
Change the defect part. 
Pass
Check the Input/Output
Of IC201.
Fail
Re-soldering or
Change the defect part,
Check RGB EDID Data.
Repeat [A], & [B] Process
Pass
Check the Input/Output
Of JK202.
Fail
Pass
Check the Input/Output
of IC800
Fail
Re-soldering or
Change the defect part.
Pass
No Raster on COMMPONENT Signal
Check Input source 
Cable and Jack.
Pass
Re-soldering or 
Change the defect part.
Pass
Check the Input/Output
Of IC800.
Fail
Re-soldering or 
Change the defect part.
Repeat [A], & [B] Process.
Check the Input/Output
of JK101.
Fail
Pass
No Raster on HDMI Signal
Check Input source 
Cable And Jack.
Pass
Check
the Input/Output of JK301,
JK302, JK303.
Fail
Re-soldering or 
Change the defect part.
Pass
Pass
Check
the Input/OutputOf IC300,
IC301, JK302.
Fail
Re-soldering or 
Change the defect part.
Check HDMI EDID Data.
Re-download HDCP.
Pass
Pass
Check the Input/Output
Of IC800.
Fail
Re-soldering or 
Change the defect part.
Repeat [A], & [B] Process.
- 15 -
No Sound
Check The Input Source.
Check The Input/Output
Of IC600.
Re-soldering or 
Change the defect part.
Fail
Pass
Pass
Check The Speaker.
Change Speaker.
Fail
Check The Speaker Wire.
Pass
Change The Source Input.
Fail
No Raster On AV (Video, S-Video)Signal
No Signal On TV(RF) Signal
Check Input source 
Cable and Jack.
Pass
Check Input source 
Cable and Jack.
Pass
Check The Input/
Output of JK101.
Pass
Re-soldering or 
Change the defect part.
Pass
Fail
Pass
Repeat [A], & [B] Process.
Check the Input/Output
Of IC800.
Fail
Re-soldering or 
Change the defect part.
Pass
Check The Input/Output
Of TU500.
Pass
Re-soldering or 
Change the defect part.
Pass
Fail
Check the Input/Output
Of IC800.
Fail
Re-soldering or 
Change the defect part.
Repeat [A], & [B] Process.
- 16 -
BLOCK DIAGRAM
RGB-PC
(JK202)
TU
NE
R
(T
U5
00
)
COMPONE
NT / 
AV
1
(JK101)
AV
2
(JK20
1)
A
V
_L
IN/RIN :
500mVrms
SPK_L 
SPK_R
COMPON
ENT_L/R
 :
500mVrms 
AV
_VIN
:
1Vpp
NTP3100
L
COMP_Y/Pb/Pr
IR & L
E
D (P
2
0
1)
HD
M
I_DA
TA
0
TU_
M
A
IN
CO
MPON
ENT_Y
/Pb/
Pr
: 
1/0.7Vpp
AV
_VIN
COMP_L
IN/RIN 
L_CH
R_CH
A
V
_L
IN/RIN 
PC-SOU
ND
(JK203)
I2S_MCL
K
I2S_
S
D
O
I2S_W
S
I2S_
S
C
K
 
TMDS
LIPS
RL_ON/
IDISP_EN
PA
NEL_
STA
TUS
E-DIM
OPC_OUT
EE
PROM
(24
L
C256
)
Se
rial
 Flas
h
(MX2
5L
6
4
)
EE
PROM 
HDCP
(2
4WC0
8)
EEP_SCL/
S
D
A
EEP_SCL/
S
D
A
TXC
E2
±±
TXC
E3
±±
TXCL
KE
±±
TXC
E1
±±
TXC
E0
±±
TXCO1
±±
TXCO3
±±
TXCO2
±±
TXCO0
±±
TXCL
KO
±±
M_SCL/SD
A
MAIN SCLAER
Matrix
(HD:LGE
4
7
6
5A)
(FHD:LGE
4
7
6
7
A
)
(IC800
)
EEP
ROM
24C
02
IC30
2 
TU500 
IC802
IC803
IC801
IC600
P402
P403
M_S
C
L
/SDA
SI
DE
REAR
HD
M
I3
(JK30
3)
US
B
(JK20
4)
RS
-232C
(JK200)
US
B(SVC)
(JK205)
HDM
I1
(JK301)
HDM
I2
(JK302)
EEP
ROM
24C
02
IC30
1 
EEP
ROM
24C
02
IC30
0 
DDC
_S
CL
1/SD
A
1
DDC
_S
CL
2/SD
A
2
DDC
_S
CL
3/SD
A
3
Contr
o
ll
e
r
ST32
32
CDR
IC20
0 
RX
D/TXD
EEP
ROM
24C
02
IC20
1 
DS
UB
_SCL/S
D
A
P401
SPI_CZ/DO
SPI_
CLK/DI
HD
M
I_DA
TA
1
HD
M
I_DA
TA
2
U
S
B DN/DP
PC_R/
G
/B
PC_VS
/HS
TXD/
R
X
D
PC_A
UD_L/
R
TXCO4
±±
TXC
E4
±±
FHD LV
DS con
ne
ctor
HD LV
DS c
onne
ctor
DDR2 SDR
A
M
(512
M B
y
te
)
IC900
DD
R2_C
K
E
DD
R2_WEZ
DD
R2_DQS0 ±
±
DD
R2_M
CLK
DD
R2_BA
0/1
DD
R2_DQS1
±±
DD
R2_ODT
DD
R2_DQM
0/1
SID
E
_VIN
SID
E
_L
IN/RIN 
Page of 27
Display

Click on the first or last page to see other 19LD330 / 19LD340 / 19LD345 (CHASSIS:LP91H) service manuals if exist.

RANDOM: