DOWNLOAD LG 42CS460 / 42CS460Y / 42CS461 / 42CS470 (CHASSIS:LB21C) Service Manual ↓ Size: 4.76 MB | Pages: 42 in PDF or view online for FREE

Model
42CS460 42CS460Y 42CS461 42CS470 (CHASSIS:LB21C)
Pages
42
Size
4.76 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42cs460-42cs460y-42cs461-42cs470-chassis-lb21c.pdf
Date
PREV: LG 42CS460 / 42CS460S / 42CS460T (CHASSIS:LD21C) Service Manual

LG 42CS460 / 42CS460Y / 42CS461 / 42CS470 (CHASSIS:LB21C) Service Manual ▷ View online

- 17 -
4. AV Video
5. Component Video
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor
Check JK1602
CVBS Signal Line
R246 
ok
ok
ok
No
Replace Jack JK1602
ok
Check CVBS_DET Signal
Replace L1603
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
No
Check input signal format.
Is it supported?
Check Component Cable
for damage or open conductor.
Check JK1602
Y/PB/PR signal Line
ok
ok
ok
No
Replace Jack JK1602
Check COMP_DET Signal
Replace L1601,  R1614
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
No
- 18 -
6. HDMI Video
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check EDID
JK802 
Pin 15, 16
I2C Signal
Check JK802
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
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
- 19 -
7. 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)
- 20 -
8. Digital TV Audio
Check RF Cable & Signal
Follow procedure 
‘8. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.8V Power 
IC3703  2 pin : 1.8V
Check IF_P/N Signal
TU3700  10/11 Pin
Replace IC3703 
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner
.
Check RF Cable & Signal
Follow procedure 
‘8. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.8V Power 
IC3703 2 pin : 1.8V
Check SIF Signal
TU3700 6 Pin
Replace IC3703 .
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner
.
9. Analog TV Audio
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