4-7
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.
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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
Yes
Does proper Stand-By DC
A5V appear at BD229?
Does proper DC A3.3V
appear at R242?
Change the Main Assy
No
Does proper DC B3.3V, B9V,
CORE_1.2V, CLS_1.8V appear
at C240, R207, C263?
No
Lamp(Backlight) Off, power indicator
LED on?
Yes
No
Check a connetion power code.
Check the backlight on,
when 30p cable unconnected.
No
Change 30p cable
32” : BN39-01099H
40” 46” 55” : BN39-01099K or
Change Main Power Assy
32” : BN44-00261B
40” : BN44-00264C
46” : BN44-00265B
55” : BN44-00268A
Yes
Does proper Main DC B12VS, B13V,
B5V appear at BD227, BD221, BD224?
Yes
Does proper DC B12V
appear at F1,F2 of T-con b’d?
No
Change the LVDS cable
32” : BN96-10077A
40” : BN96-10076A
46” : BN96-10075A
55” : BN96-10074A
Change the T-con b’d
Does proper DC B1.05V, B3.3VD
appear at BD108, BD2711 of T-con b’d?
No
No
No
Yes
Yes
Yes
Yes
Does proper VCC18, VCC33 appear at
BT7, BT8 of T-con b’d?
No
Check a other function
(No picture part)
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LA32B650T1R
Страница 28: ...1 4 1 Precautions Memo ...
Страница 61: ...4 9 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Страница 63: ...4 11 4 Troubleshooting WAVEFORMS 3 PC input V sink H sink R G B 2 LVDS output ...
Страница 65: ...4 13 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 67: ...4 15 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 69: ...4 17 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 71: ...4 19 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...
Страница 85: ...4 33 4 Troubleshooting 5 Press 0 6 Save latest BSP images to update folder in usb memory ...
Страница 86: ...4 34 4 Troubleshooting 7 Enter bbm usb after connecting usb memory 8 Press 1 ...
Страница 87: ...4 35 4 Troubleshooting 9 Enter u boot bin 10 Press x to return prompt menu ...