LG 32LK336C (CHASSIS:LD0EC) Service Manual ▷ View online
- 17 -
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
TU3700 10/11 Pin
Replace IC3703.
Check Mstar LVDS Output.
Replace Mstar(IC101) o r Main Board.
ok
ok
ok
ok
No
No
No
No
Bad Tuner. Replace Tuner.
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.
TU3700 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.
2. Digital TV Video
3. Analog TV Video
- 18 -
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor.
Check JK1604
CVBS Signal Line
R246.
ok
ok
ok
No
Replace Jack.
ok
Check CVBS_DET Signal.
Replace R1666.
No
Check Mstar LVDS Output.
Replace Mstar(IC101) or Main Board.
No
4. AV Video
Check input signal format.
Is it supported?
Check Component Cable
for damage or open conductor.
Check JK1601 or 1603
Y/PB/PR signal Line.
ok
ok
ok
No
Replace Jack.
Check COMP_DET Signal.
Replace R1615.
No
Check Mstar LVDS Output.
Replace Mstar(IC101) o r Main Board.
ok
No
5. Component Video
- 19 -
Check input signal format.
Is it supported?
Check Component Cable
for damage or open conductor.
Check JK1602
R/G/B and sync signal Line.
ok
ok
ok
No
Replace Jack.
Check SC1_DET Signal.
Replace R1614.
No
Check Mstar LVDS Output.
Replace Mstar(IC101) or Main Board .
ok
No
Check input signal format.
Is it supported?
Check RGB Cable conductors
for damage or open conductor.
Check EDID
I2C Signal
R138, R139(SDA,SCL).
Check JK1104
H/V_Sync/R/G/B Signal Line.
ok
ok
ok
No
No
R
e-download EDID data ,Replace Mstar(IC101) or Main Board.
ok
Replace Jack.
Check DSUB_DET.
Replac e R1146 or R1147.
No
Check Mstar LVDS Output.
Replace Mstar(IC101) or Main board.
ok
No
6. SCART Video
7. RGB Video
- 20 -
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check EDID
R4033,R4034,R4035,R4036,
R4037,R4038 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) o r Main Board.
ok
No
Replace Main Board.
No
Check HDMI_DET(HPD).
No
ok
Replac e R830,R828,R862.
8. HDMI Video
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