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4-2
4. Troubleshooting
4-1-1. 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.
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-
-
-
Diagnostics
Caution
Make sure to disconnect the power before working on the IP board.
Does proper Main DC B13V_S, B5V,
B13V appear at #7,8 of CN1001,
C1083, BD11BL?
Does proper DC A3.3V
appear at C1081?
Check IC1002
Change the Main Ass`y
26” : BN94-01638C
32” : BN94-01638D
37” : BN94-01638E
40” : BN94-01638F
No
Yes
Does proper DC B3.3V appear at
C1085?
No
Yes
Lamp(Backlight) Off, power indicator
LED on?
Yes
No
Change the power cable.
26”: BN39-00802A
32”: BN39-00802C
37”: BN39-00802S
40”: BN39-00802F
Does proper Stand-By DC
A5V appear at D1001?
No
Change the Main Power assembly.
The location is T0764.
Yes
Yes
Check IC1003
Change the Main Ass`y
26” : BN94-01638C
32” : BN94-01638D
37” : BN94-01638E
40” : BN94-01638F
Does proper 1.2V_CORE appear at
C2032?
No
Check IC3001
Change the Main Ass`y
26” : BN94-01638C
32” : BN94-01638D
37” : BN94-01638E
40” : BN94-01638F
Summary of Contents for LN26A330J1D
Page 7: ...1 4 1 Precautions Memo ...
Page 127: ...5 104 5 Exploded View Part List Memo ...
Page 131: ...4 4 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Page 139: ...4 12 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Page 159: ...4 32 4 Troubleshooting Memo ...
Page 160: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 26 Wiring Diagram ...
Page 161: ...6 2 6 Wiring Diagram 6 2 40 Wiring Diagram ...
Page 162: ...6 3 6 Wiring Diagram ...
Page 164: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 Internal Block Diagram of Scaler MSD2248AL ...
Page 165: ...7 2 7 Schematic Diagram 7 2 SCHEMATIC Block Diagram ...
Page 166: ...7 3 7 Schematic Diagram 7 3 SlimHalf Tuner Diagram ...
Page 167: ...7 4 7 Schematic Diagram 7 2 Schematic Diagrams 7 2 1 STANDBY ...
Page 168: ...7 5 7 Schematic Diagram 7 2 2 FUNCTION KEY 7 2 3 LCD OPTION ...
Page 169: ...7 6 7 Schematic Diagram 7 2 4 FBE ...
Page 170: ...7 7 7 Schematic Diagram 7 2 5 ATSC HALF NIM TUNER 7 2 6 DVI SOUND INPUT ...
Page 171: ...7 8 7 Schematic Diagram 7 2 7 HDMI INPUT ...
Page 172: ...7 9 7 Schematic Diagram 7 2 8 SIDE HDMI CONNECTOR 7 2 9 SOUND AMP ...
Page 173: ...7 10 7 Schematic Diagram Memo ...