Lg Electronics 47LE8500 Manuale Utente
July 2010 LCD TV
47LE8500
83
Main Board Connector P8800 to Speakers Voltage and Diode Check
Main Board Connector P8800 to Speakers Voltage and Diode Check
Diode Mode values taken with all Connectors Removed
P8800 CONNECTOR "Main" to "Speakers"
SPK-L(+)
SPK-L(-)
SPK-R(+)
SPK-R(-)
LABEL
Open
12.3V
0V
4
Open
12.3V
0V
3
Open
12.3V
0V
2
Open
12.3V
0V
1
Diode Check
Run
SBY
Pin
Use speaker out to test for defective Audio Amp IC8801
Note: (Normal, ½ Audio B+)
P8800
Q8800
Amp Mute
Audio B+
24V
Pins 49-52
Mute
Pin 25
Q8800 (Mute) Active Low.
Normal 3.3V Collector to Pin 25
Normal 3.3V Collector to Pin 25
IC8801
IC8800
Amp
1.8V
(1)
Leandro
Palmeira