Panasonic TX-49GXF937, Руководство по обслуживанию

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Power LED blinking timing chart
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
LCD PANEL
P BOARD
5
PMIC_SOS
(Power Management
IC SOS)
A BOARD
7
SUB3.3V_SOS
Over-voltage_SOS
A BOARD
P BOARD
9 SOUND_SOS
A BOARD
SPEAKERS
13
EMERGENCY SOS A BOARD
LCD Panel Test Mode
Purpose:
To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.
How to Enter:
While pressing [VOLUME ( - )] button of the main unit, press [YELLOW] button of the remote control three times.
How to Exit:
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
How to confirm:
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.
Remarks:
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.
No Light
Light
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