DOWNLOAD LG 47LM4600 (CHASSIS:LA21B) Service Manual ↓ Size: 5.77 MB | Pages: 43 in PDF or view online for FREE

Model
47LM4600 (CHASSIS:LA21B)
Pages
43
Size
5.77 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
47lm4600-chassis-la21b.pdf
Date
PREV: LG 47LM4600 / 47LM4610 / 47LM4650 (CHASSIS:LB21B) Service Manual

LG 47LM4600 (CHASSIS:LA21B) Service Manual ▷ View online

- 16 -
2. Digital TV Video
Check RF Cable & Signal
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.8V Power 
IC3703  2 pin : 1.8V
Check IF_P/N Signal
TU3704 10/11 Pin
Replace IC3703 
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
.
ok
ok
ok
ok
No
No
No
No
Bad Tuner. Replace Tuner
.
3. Analog TV Video
Check RF Cable & Signal
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.8V Power 
IC3703 2 pin : 1.8V
Check CVBS Signal
TU3704 8 Pin
Replace IC3703 .
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
.
ok
ok
ok
ok
No
No
No
No
Bad Tuner. Replace Tuner
.
- 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 JK1601, CVBS Signal Line
L1603
ok
ok
ok
No
Replace Jack
ok
Check CVBS_DET Signal
Replace R1600
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 JK1603 or JK1602 or JK1601
Y/PB/PR signal Line
ok
ok
ok
No
Replace Jack
Check COMP_DET Signal
Replace R1612 or R1613
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
.
ok
No
- 18 -
6. RGB Video
Check input signal format.
Is it supported?
Check RGB Cable conductors
for damage or open conductor
Check EDID
I2C Signal
R1138, R1139(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
- 19 -
7. HDMI Video
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check EDID
R884,R8 I2C Signal
Check JK801, JK802, JK803
ok
ok
ok
No
No
Replace the defective IC or re-download EDID data
Check HDCP EEPROM(IC103)
Power & I2C Signal
Replace the defective IC.
ok
No
Replace Jack
Check HDMI Signal
Check other set
If no problem, check signal line
ok
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
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