Panasonic gp6d th-42px20u th-50px20u th-42pa20u th-37pa20u update information Manuales De Servicio

In some cases, the front panel LED will flash a pattern indicating the circuit that 
has failed. Be sure to record the pattern displayed at start-up. 

Number of 
LED Flashes 

Failed Circuit(s)  

Detection 
Point 

Note Suspected 

Board(s) 

1 

Main Micro power 
STB5V 

IC9709 
pin 34 

Voltage 
too low 

P Board 

2 Scan 

Driver 1 
Vf5 
Vad 

Vscan 
Vfo 

 

IC9709 
pin 64 

Voltage 
too low 

SC Board 

3 

3.3V S0S 

IC9709    
Pin 3 

 D 

Board 

4 

5V SOS                   
P5V 

IC9709 
pin 2 

Voltage 
down 

P Board 

5 

Power SOS  
Vsus (170V) 
15V  
20V 

IC9709 
pin 63 

Voltage 
down 

P Board 

6 Fan 

Stop 

IC9709 
pin 37 

 Fan 

7 

SCAN Driver 2 
½ Voltage 
(Energy Recover) 

IC9709 
pin 1 

Load 
over 
Detect at 
IC6581 

SC Board 

9 SUS 

Driver 

½ Voltage 
(Energy Recover) 

IC9709 
pin 61 

Load 
over 
Detect at 
IC6705 

SS Board 

12 Tuner 

Power 
UNR21V 
UNR14V 
+2.5V(M) 
+9V(M) 

+9V(S) 
+5V(S) 
+3.3V(M)

IC001 pin 
69 
 

Voltage 
down or 
over 
current 

Tuners or 
PA Board or  
P Board  

 
LED indicators on the SS and SC boards alert the technician when a problem 
exists. The LEDs should be lit during normal operation, a dark LED indicates that 
a problem exists on that board. 

 

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