DOWNLOAD LG 32LD550 (CHASSIS:LA02B) Service Manual ↓ Size: 4.9 MB | Pages: 58 in PDF or view online for FREE

Model
32LD550 (CHASSIS:LA02B)
Pages
58
Size
4.9 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
32ld550-chassis-la02b.pdf
Date
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LG 32LD550 (CHASSIS:LA02B) Service Manual ▷ View online

8. All Source Audio
Check the TV Speaker Menu
(Menu -> Sound -> TV Speaker)
On
ok
ok
Check Output Signal P8800
1, 2, 3, 4 pin.
Replace Audio AMP IC(IC8801)
ok
No
Check Connector & P8800
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(IC8801) Power
*20V, 3.3V, 1.8V.
No
Check Regulator IC8800
Check Mstar I2S Output
R8801, R8802, R8803
No
Check signal line. Or replace BCM( IC900)
Check  AUDIO_MASTER_CLK
R8828
No
Replace BCM( IC900) or Main Board.
ok
Check AMP I2C Line
R8804, R8805
No
Check signal line. Or replace BCM( IC900) 
*20V Voltage is dependent on Model
32/42/46LD550 , 47LD650 => 20V
52/60LD550 , 55LD650 => 24V
9. Digital TV Audio
Check RF Cable & Signal
Follow procedure 
‘8. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L701
Replace L701
Check Tuner 1.2V Power 
IC700  2 pin : 1.2V
Check IF_P/N Signal
TU700  17/18 Pin
Replace IC700
Check Tuner 5V Power
L700
ok
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner.
Check IC8003
No
Replace IC8003
No
Replace L8007
ok
10. Analog TV Audio
Check RF Cable & Signal
Follow procedure 
‘8. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L701
Replace L701
Check Tuner 1.2V Power 
IC700  2 pin : 1.2V
Check CVBS Signal
TU700  11 Pin
Replace IC700.
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner.
Check Tuner 5V Power
L700
ok
Check IC8003
No
Replace IC8003
No
Replace L8007
ok
12. Component Audio
Check Component Cable
for damage or open conductor.
Check JK100 & Signal Line
ok
ok
No
Replace Jack
11. AV Audio
Check AV Cable for damage
for damage or open conductor
Check JK100 , JK8500 
& Signal Line
ok
ok
No
Replace Jack
Follow procedure 
‘8. All source audio’
trouble shooting guide.
Follow procedure 
‘8. All source audio’
trouble shooting guide.
13. RGB Audio
Check Cable conductors
for damage or open conductor
Check JK8401  & Signal Line
ok
No
ok
Replace Jack
Follow procedure 
‘8. All source audio’
trouble shooting guide.
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