Read LG 42LN549D (CHASSIS:LB3AX) Service Manual online
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TROUBLE SHOOTING GUIDE
1. Check the booting Voltage
Make sure the Stand-by Voltage
P401 3, 5pin : +3.5V_ST
Make sure the Micom voltage
L403 : +3.5V _ST
Make sure the CLK of X201
Is 24MHZ
Make sure the PWR_ON of P401
1pin : 3.5V
Make sure the Multi Voltage
P401 9, 10pin : 24V , 13~15pin : 12V
Make sure the Output Voltage of IC 402/3/7
IC402: 2.5V, IC403: 1.1V, IC407: 1.5V , Q403: 3.3V
Make sure the Power
Connector
Make sure the disconnection of
Main board 3.5V circuit
Exchange the
Circuit board
Make sure the voltage of LVDS Power
Q406: 12V
Make sure the output of MSTAR LVDS
Make sure the Inverter control and error
P401 2pin: High
Exchange the LCD Module
Exchange the L403
Exchange the X201
Re- download of Firmware
Exchange the circuit board
Exchange the IC402/3/7,
Q403
Exchange the Q406
Exchange the Mstar(IC101)
Or Main board
Exchange the circuit or
check the LCD Module
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Exchange the Mstar(IC101)
Or Main board
ʹΙΖΔΜ͑ΥΙΖ͑΄ΥΒΟΕ͞ΓΪ͑·ΠΝΥΒΘΖ
ͥ͑ͤ͑ͦ͢͡͝ΡΚΟ͑ͫ͑ͤͦ͜͟· ΐ΄΅͑
ͥ͑ͤ͑ͦ͢͡͝ΡΚΟ͑ͫ͑ͤͦ͜͟· ΐ΄΅͑
ʹΙΖΔΜ͑ΥΙΖ͑΅ΦΟΖΣ͑ͤͤ͟· ͑
ͬ͑ͽͤ͢͡͡
ͬ͑ͽͤ͢͡͡
ʹΙΖΔΜ͑ΥΙΖ͑΅ΦΟΖΣ͑ͩ͢͟·
ͺʹ͑ͣ͢͢͡͡ΡΚΟ͑ͫ͑ͩ͢͟·
ͺʹ͑ͣ͢͢͡͡ΡΚΟ͑ͫ͑ͩ͢͟·
ʹΙΖΔΜ͑ΥΙΖ͑ͺͷΐ͠Ϳ͑Τ ΚΘΟΒΝ
΅Άͣ͑͢͢͢͢͡͡͡͠ΡΚΟ
΅Άͣ͑͢͢͢͢͡͡͡͠ΡΚΟ
ʹΙΖΔΜ͑ΥΙΖ͑ͽ· ͵΄͑ΠΦΥΡΦΥ͑ΤΚΘΟΒΝ͑ΠΗ͑;ΤΥΒΣ͑ͺʹ
ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑ͽͤ͢͡͡
ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑ͺʹ͢͢͡͡
ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑΅ΦΟΖΣ
ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑;ΤΥΒΣ͙ͺʹ͚͢͢͡
Σ͑;ΒΚΟ͑ΓΠΒΣΕ
Σ͑;ΒΚΟ͑ΓΠΒΣΕ
ͿΠ
ͿΠ
ͿΠ
ͿΠ
Ί ΖΤ
Ί ΖΤ
Ί ΖΤ
Ί ΖΤ
2. Digital TV Video
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