TX-L42ET60B, TX-L42ET60Y, TX-LR42ET60 - Panasonic TV Service Manual (repair manual). Page 22

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1. Subject 

Information of LED Flashing timing chart. 

 
2. Contents 

When abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the 
defective block can be identified by number of blinking of the Power LED on the front panel of the unit. 

 
 

Blinking 

times 

Blinking timing 

Contents 

Check point 

1  

BL_SOS 

 

A BOARD 

PANEL 

7 

 

SUB3.3V/1.2V 

 

A BOARD 

 

8 

 

SOS 

 

A BOARD 

PANEL 

9 

 

SOUND_SOS 

 

A BOARD 

 

13 

 

EMERGENCY  

A BOARD 

 

To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed. 
 

While pressing [VOLUME ( - )] button of the main unit, press [YELLOW] button of the remote control three times. 
 

Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control. 
 

If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns. 
And then, judge by the following method. 
Still abnormal picture is displayed: The cause must be in LCD Panel. 
Normal picture is displayed: The cause must be in A board. 
 

The test pattern is created by the circuit in LCD Panel. 
In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal. 
If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board. 
 

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