LG 32LG50FD (CHASSIS:LJ82A) Service Manual ▷ View online
- 25 -
RGB Video Trouble Shooting
Check sig nal fo rmat
Is it sup ported?
Check sig nal, Hsync, Vs ync
C729, C730, C731, R763, R764
Replace it.
Check sig nal
R703, R768, R772
Y
Y
N
Check P70 1
Replace connector
Y
N
Y
Replace it
N
Maybe BCM3553(IC100) has
proble ms
Check L 703 Voltag e Level 9V
Y
Replace L 703 / Q701 / Q703 /
Q704
N
Check Sig nal
C635, C636, C637
Y
Replace it
N
Check RGB C able
Y
- 26 -
AV Video Trouble Shooting
Check sig nal fo rmat
Is it sup ported?
Check sig nal
R755 (Composite),
R741 / R740 (S-Vide o) (Rear)
R797 (Composite)
Replace it.
Check sig nal
C651 (Composite),
C648 / C649 (S-Vide o) (Rear)
C652 (Composite)
Y
N
Check JK 701 (Rear)
Check JK 707 & Cab le (Sid e)
Replace connector
Y
N
Y
Replace it
N
Maybe BCM3553(IC100) has p roblems
Y
Check AV Cable / S-Vid eo Cable
Y
- 27 -
HDMI Video Trouble Shooting
Check sig nal fo rmat
Is it sup ported?
Y
Check JK 600 / JK601( REAR),
JK70 5(SIDE)
Replace connector
Y
N
Y
Check HDMI Cable
Check EDID N VRAM (IC603,
604,700)
Power & I2C Sig nal (#5, #6)
Replace it o r red ownlo ad
Y
N
Check HD CP Key NVRAM
(IC102)
Power & I2C Sig nal (#5, #6)
Replace it
Y
N
Check L 826
Voltag e Level 3.3V
Replace it
Y
N
Check L 602 Voltag e Level 5V
Replace it
Y
N
Check IC60 1 Clo ck Sig nal
#26, #27
Replace it
Y
N
Maybe BCM3553(IC100) has p roblems
- 28 -
All Source Audio Trouble Shooting
Make su re you can t h ear an y audio
Check Sig nal
L504, L506
Replace it.
Check Sig nal
L507, L508, L509, L510
Y
N
Check IC50 1 Power 16V, 3.3V, 1.8V
L500, L501, L502, L503
Replace L
Y
N
Y
Replace it
N
Check Connector
P500
Y
Check BCM 3553 I2S Outp ut
R627, R628, R629
Y
Replace it.
N
Replace connector
N
Check sp eaker
Y
Replace sp eaker
N
Maybe NTP3000 has p roblems.
Replace it
Y
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