LG 47CS560 / 47CS560Y (CHASSIS:LB21B) Service Manual ▷ View online
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Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor
Check JK1601
CVBS Signal Line
R246
ok
ok
ok
No
Replace Jack JK1601
ok
Check CVBS_DET Signal
Replace L1603
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
.
No
4. AV Video
5. Component Video
Check input signal format.
Is it supported?
Check Component Cable
for damage or open conductor.
Check JK1601
Y/PB/PR signal Line
ok
ok
ok
No
Replace Jack JK1601
Check COMP_DET Signal
Replace L1601, R1614
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
.
ok
No
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Check input signal format.
Is it supported?
Check RGB Cable conductors
for damage or open conductor
Check EDID
I2C Signal
JK1104 Pin12, 15 (SDA,SCL)
Check JK1104
H/V_Sync/R/G/B Signal Line
ok
ok
ok
No
No
re-download EDID data ,Replace Mstar(IC101) or Main Board
ok
Replace Jack
Check DSUB_DET
Replace R1146 or R1147
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
.
ok
No
6. RGB Video
- 19 -
7. HDMI Video
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check EDID
JK801, JK802, JK803
Pin 15, 16
I2C Signal
Check JK801, JK802, JK803
ok
ok
ok
No
No
Replace the defective IC or re-download EDID data
ok
Replace Jack
Check HDMI Signal
Check other set
If no problem, check signal line
If no problem, check signal line
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
.
ok
No
Replace Main Board
No
Check HDMI_DET(HPD)
No
ok
Replace R830,R828,R862
- 20 -
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
24V, 3.3V
No
Replace Amp IC(IC501)
Check Mstar I2S Output
IC501 9,10,11 Pin
No
Check signal line. Or replace Mstar(IC101)
Check Mstar AUDIO_MASTER_CLK
R148
No
Replace Mstar(IC101) or Main Board
.
ok
Check AMP I2C Line
R140, R141
No
Check signal line. Or replace Mstar(IC101)
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