Main Board Connector P600 To Speakers Voltage And Diode Check - LG 42LH90 Manual

Main Board Connector P600 to Speakers Voltage and Diode Check

Main Board Connector P600 to Speakers Voltage and Diode Check
P600
Diode Mode values taken with all Connectors Removed
Q400 (Mute) Active Low. Normal 3.3V Collector to Pin 25
Use speaker out to test for defective Audio Amp IC600
Note: (Normal, ½ Audio B+)
P400 CONNECTOR "Main" to "Speakers"
Pin LABEL
1 SPK-R(-)
2 SPK-R(+)
3 SPK-L(-)
4 SPK-L(+)
Audio B+
24V
Pins 49-52
SBY Run
0V 12V
0V 12V
0V 12V
0V 12V
81 February 2010
IC600
Mute
Pin 25
Diode Check
2.63V
2.63V
2.63V
2.63V
LCD DV
Mute
Driver
Q600
Back of
board
42LH90