SAMSUNG LCD TV - LN22C450E1M/LN26C450E1M/LN32C450E1M
LN32C530F1M/LN37C530F1M/LN40C530F1M/ LN46C530F1M/LN52C530F1M
LN32C550J1M/LN40C550J1M/LN46C550J1M _ TROUBLESHOOTING
SYMPTOM
- The LEDs on the front panel do not work when connecting the power cord.
- The SMPS relays does not work when connecting the Power Cord.
- The unit appears to be dead.
CHECK POINTS
The IP relay or the LEDs on the front panel does not work when
connecting the power cord, if the cables improperly connected or the
Main Board or SMPS is not functioning. In this case, check the
following.
- Check the internal cable connection status inside the unit.
- Check the fuses of each part.
- Check the output voltage of SMPS.
- Replace the Main Board.
FAULT DIAGNOSIS
|
Lamp off, power indicator LED red color?
|
No
|
Check a connection a power cable.
|
|
Yes
|
|
|
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Does proper DC 13V appear at Pin 1, 3, 13, 15, 17 of
CN210_N22?
|
No
|
Change a ass’y PCB power.
|
|
Yes
|
|
|
|
Does proper DC A3.3V appear at BD215?
|
No
|
Check a IC201.
Change a main PCB ass’y.
|
|
Yes
|
|
|
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Does proper DC 3.3V, 1.1 appear at BD216, BD201?
|
No
|
Check IC203, IC204 Change Main PCB ass’y.
|
|
Yes
|
|
|
|
A power is supplied to set?
|
No
|
Check a other function.
No picture part. Replace a LCD
panel.
|
NO VIDEO. ANALOG PC SIGNAL
- Audio is normal, but no picture is displayed on screen.
- Check the PC source.
- Check the SETD-10 (SX1)
- This may happen when the LVDS cable connecting the main board and the panel is disconnected.
DIAGNOSIS
|
Power indicator is off.
Lamp on, no video
|
|
|
|
Yes
|
|
|
|
Check a PC source and check the connection of DSUB cable?
|
No
|
Input an analog PC and connected cable [DPMS]
|
|
Yes
|
|
|
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Does the signal appear at BD909, BD910, BD911 (R,G,B)?
|
No
|
Pc cable. Change
the PC cable. Change Main PCB ass’y.
|
|
Yes
|
|
|
|
Does the digital data appear at the output of LVDS signal?
|
No
|
Check IC1102. Change Main PCB ass’y.
|
|
Yes
|
|
|
|
Check LVDS cable?
Replace LCD panel
|
No
|
Contact tech support.
|
