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4-2
4. Troubleshooting
4-1-2. No Power
Symptom
The LEDs on the front panel do not work when connecting the power cord.
-
The SMPS relay does not work when connecting the power cord.
-
The units appears to be dead.
-
Major
checkpoints
The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are
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.
-
Diagnostics
Power indicator LED on?
No
No
No
Change 18p power cable and SMPS.
Change the Main Assy.
Does proper Stand-By DC
A5V appear at BD207?
Does proper Main
DC B13 V, B5 V appear at
BD209 (B13 V), BD213 / 208(B5V)?
Does proper DC A3.3 V
appear at IC202 (#5)?
Yes
Yes
Yes
Yes
No
No
Does proper B3.3 V, B2.5 V, B1.06 V,
B1.5 V appear at L201 (B3.3 V)
BD1008 / 9 / 10 / 11 (B2.5 V)
BD1002 / 3 / 4 (B1.06 V)
BD1012 (B1.5 V)?
Yes
Does proper DC B13 V
appear at LVDS connector Pin #1 ~ 5
of T-Con Board?
No
Yes
Change the LVDS Cable.
Содержание LN26D450G1G
Страница 27: ...4 5 4 Troubleshooting Location Main TOP BD404 R805 R804 R806 BD405 ODD_TXCLK ODD_TXCLK EVEN_TXCLK EVEN_TXCLK ...
Страница 28: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Страница 30: ...4 8 4 Troubleshooting Location Main TOP ODD_TXCLK ODD_TXCLK EVEN_TXCLK EVEN_TXCLK Pin 7 Pin 12 ...
Страница 31: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 33: ...4 11 4 Troubleshooting Location Main TOP ODD_TXCLK ODD_TXCLK EVEN_TXCLK EVEN_TXCLK Location Main BOTTOM 3 5 ...
Страница 34: ...4 12 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 36: ...4 14 4 Troubleshooting Location Main TOP ODD_TXCLK ODD_TXCLK EVEN_TXCLK EVEN_TXCLK Location Main BOTTOM 3 5 ...
Страница 37: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 39: ...4 17 4 Troubleshooting Location Main TOP ODD_TXCLK ODD_TXCLK EVEN_TXCLK EVEN_TXCLK R821 R816 R814 R809 ...
Страница 40: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 43: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 45: ...4 23 4 Troubleshooting Location Main TOP BD209 R550 R549 R419 R420 R R L L R525 R524 WAVEFORMS 7 Speaker out ...