Read LG 32LG50FD (CHASSIS:LJ82A) Service Manual online
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Digital TV Video Trouble Shooting
Check RF Cable
Check TU800 TP Clock, Data, Sync
PIN#10 (38.1MHz), PIN#13, PIN#14
Maybe Tuner(TU800) has
proble ms
Check BCM 3553 Outp ut TP
Clock, Data, Sy nc
R153, R155, R152
Check BCM 7412 Clock, Hsync, Vsync
R108 8(Tpy. 74.25MHz), R1087, R1086
Y
Y
N
Check Tuner 5V Po wer
IC804 #3 Pin
Replace IC804
Y
N
Y
Maybe BCM3553(IC100) has
proble ms
N
Maybe BCM7412(IC1000) has
proble ms
N
Check PL D Clo ck, Hs ync, Vsy nc
R1102(Typ. 74.25MHz), R1100, R1101
Y
Redo wnload PLD file or re place
N
Maybe BCM3553(IC100) has
proble ms
Y
Check T UNER PIN#9
(ERROR FLAG)
Bad Tuner. Replace Tuner.
LOW
HIGH
Check BCM 7412 Input Clock
R107 (27MHz)
Replace it
N
Y
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