Panasonic LH44, TC-19LX50, TC-23LX50 Service Hints

ORDER NO. ITD0506036BE

B05 Canada:B07

LCD TV

TC-19LX50 TC-23LX50

Subject : Power LED Blinking

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Subject : Power LED Blinking

When an 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 the number of blinks of the Power
LED on the front panel of the unit.

Applicable Model

TC-19LX50 TC-23LX50

Blinking times Contents Detection

Inverter SOS

2

3

5

6

7

No voltage (+24V) from Power Unit or
failure of Inverter in LCD Panel.

Low or no voltage at
MAIN 9V generated by Q861

Low or no voltage at
SUB 5V generated by IC853

Low or no voltage at
SUB 9V generated by IC851

Over voltage at
Sound 10V, SUB 9V, SUB 5V or
Panel 5V.
Low or no voltage at
BT30V or Panel5V.

Pin 110 of IC1101 (MCU)
SOS : HIGH
Normal : LOW

Pin 19 of IC1101 (MCU)
SOS : LOW
Normal : HIGH

Pin 20 of IC1101 (MCU)
SOS : LOW
Normal : HIGH

Pin 18 of IC1101 (MCU)
SOS : LOW
Normal : HIGH

Pin 111 of IC1101 (MCU)
SOS : LOW
Normal : HIGH

9 No communication with IC4016 (GC4) Through IIC bus