DOWNLOAD LG 37LD450 (CHASSIS:LT01B) Service Manual ↓ Size: 5.11 MB | Pages: 60 in PDF or view online for FREE

Model
37LD450 (CHASSIS:LT01B)
Pages
60
Size
5.11 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
37ld450-chassis-lt01b.pdf
Date
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LG 37LD450 (CHASSIS:LT01B) Service Manual ▷ View online

7. HDMI Video
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check EDID & EEPROM
IC801*, IC804**
I2C Signal
Check JK802, JK903
ok
ok
ok
No
No
Replace the defective IC or re-download EDID data
Check HDCP Key NVRAM(IC103)
Power & I2C Signal
Replace the defective IC.
ok
No
Replace Jack
Check HDMI Signal
Check other set
If no problem, check signal line
ok
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
No
Replace Main Board
No
Check HDMI_DET(HPD)
No
ok
Replace R802*,R804*,R830*,R896*,Q802*
Replace R835**,R837**,R862**,R897**,Q803**
* HDMI1
** HDMI2
* HDMI1
** HDMI2
8. All Source Audio
Check the TV Speaker Menu
(Menu -> Sound -> TV Speaker)
On
ok
ok
Check Output Signal P501
1, 2, 3, 4 pin.
Replace Audio AMP IC(IC501)
ok
No
Check Connector & P501
Replace connector
if found to be damaged.
ok
No
Check speaker resistance
and connector damage.
Replace speaker.
ok
No
Off
Toggle the Menu
Check AMP IC(IC501) Power
*20V, 3.3V, 1.8V.
No
Check Regulator IC404
*20V Voltage is dependent on Model
26LD350 => 24V
Check Mstar I2S Output
R503, R504, R505
No
Check signal line. Or replace Mstar(IC101)
Check Mstar AUDIO_MASTER_CLK
TP502
No
Replace Mstar(IC101) or Main Board.
ok
Check AMP I2C Line
R506, R507
No
Check signal line. Or replace Mstar(IC101)
9. Digital TV Audio
Check RF Cable & Signal
Follow procedure 
‘8. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L5003
Replace L5003
Check Tuner 1.2V Power 
IC5001 2 pin : 1.2V
Check IF_P/N Signal
TU5001 17/18 Pin
Replace IC5001.
Check Tuner 5V Power
L5002
Check IC401
ok
ok
ok
ok
No
No
No
No
Replace IC401
No
Bad Tuner. Replace Tuner.
Replace L5002
ok
10. Analog TV Audio
Check RF Cable & Signal
Follow procedure 
‘8. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L5003
Replace L5003
Check Tuner 1.2V Power 
IC5001 2 pin : 1.2V
Check CVBS Signal
TU5001 11 Pin
Replace IC5001.
Check Tuner 5V Power
L5002
Check IC401
ok
ok
ok
ok
No
No
No
No
Replace IC401
No
Bad Tuner. Replace Tuner.
Replace L5002
ok
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