DOWNLOAD LG 55LEX8-SA (CHASSIS:LJ03S) Service Manual ↓ Size: 7.58 MB | Pages: 88 in PDF or view online for FREE

Model
55LEX8-SA (CHASSIS:LJ03S)
Pages
88
Size
7.58 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
55lex8-sa-chassis-lj03s.pdf
Date
PREV: LG 47LEX8-ZA (CHASSIS:LD03S) Service Manual

LG 55LEX8-SA (CHASSIS:LJ03S) Service Manual ▷ View online

7. Trouble shooting - No video (HDMI)
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check HDMI Switch 
IC8300 video Signal and I2C line
Check JK8300 / 1 / 2
ok
ok
ok
No
No
Replace Coil or FET
ok
Replace Jack
Check HDMI Signal output
of  HDMI Switch (IC8300)
Check resister R8329 ~ R8334
If no problem, check signal line
No
Replace BCM( IC900) or Main Board
No
Check HDMI_DET(HPD)
No
ok
Replace R8300.R8302, R8301
Check L8300(+3.3V) , Q200 (+1.8V) 
Replace the defective IC.
No
OK
ok
No
Check BCM LVDS Output
Replace BCM( IC900) or Main Board.
8. Trouble shooting - No video (FRC - TM480Hz with 3D FPGA)
Check 4Ch DC-DC Converter IC Output
ok
Check LG1120 Input Signal(60Hz)
Check LG5111 Output Signal
Check LG1120 Output Signal(240Hz)
Check 240Hz T-con IC Output Signal
Check X-Tal Output(X100, 25MHz)
Check 12V Power
L902, L903
ok
ok
ok
ok
No
No
No
Check Input Voltage
-. 3.3V(L401, L501)
-. 1.8V(L400, L500)
T-con  B/D 12V Line
Short Check
No
Check 24V Line Check
C1316, C1317
ok
Check FFC Cable(80P, T-con to Module)
ok
Check P-Gamma Data
Change Module
ok
Replace T-Con B/D
ok
Check LG1120 I2C Line
ok
Check Input Voltage
-. 3.3V(L104)
-. 2.5V(L309)
-. 1.0V(L303)
ok
ok
Replace LG1120
(IC102)
Check T-con IC I2C Line
ok
ok
Replace T-con IC
(IC400 or IC500)
No
Check DC-DC Output Voltage
-. VGH / VGL / VCC
No
Replace T-con B/D
(Output voltage setting is different for each model)
No
Check P-Gamma IC
VCC Input (L800)
ok
Check P-Gamma IC
I2C Line
Check output Data
ok
Replace P-Gamma IC
(IC801)
No
Check FPGA(IC11400) Output Signal(240Hz)
Check X-Tal Output
(X11400, 54MHz)
ok
No
Check FPGA I2C Line
ok
ok
ok
Replace FPGA
(IC11400)
Check Input Voltage
-. 2.5V(IC303, 6pin)
-. 1.2V (L308)
Check STDP4020 Output Signal
No
9. Trouble shooting – 3D Mode view error (no Depth, like 2D mode)
Change the 3D Glasses
ok
Check 3D_SYNC Line
- T-Con B/D  P1302 3pin
- Main B/D P3302 16pin
No
Check 3D Emitter of Main – P1302 1pin : 5V
Check Q11402,4 of T-Con B/D
Maybe FPGA or FRC has problems.
Replace It or 3D T-Con B/D
No
Replace 3D Glasses
Replace 3D Emitter Assy
ok
No
Replace Q11402,4 of T-Con B/D
No
ok
10. Trouble shooting - No video or Abnormal image (M+S block)
Check mini-LVDS FFC cable
Check VDD_LCM (16V)
VCC_LCM (3.3V)
VGH(24V)
VGL(-5V)
Check P-Gamma Data
Check IC9100
AVDD (R9112)
Check P-Gamma IC
I2C Line
Check VLCD_POWER(12V)
(IC900)
No good
Replace IC900
No good
OK
OK
Check HVDD
Replace IC701
No good
Replace IC600
No good
OK
Check output
data
OK
Replace P-Gamma IC
(IC9100)
No good
OK
Check Module
OK
8 V
16 V
-5 V
28 V
55 ALEF
8.2 V
16 V
-5 V
26 V
47 ALEF
HVDD
VDD_LCM
VGL
VGH
Module
Q Remark
OK
Page of 88
Display

Click on the first or last page to see other 55LEX8-SA (CHASSIS:LJ03S) service manuals if exist.

RANDOM: