LG 32LG40 Training Manual page 55

MAIN BOARD lD803 ChECk
Use LD803 as a visual aid. This lets you know if the +5V is being converted to 3.3V for
the BCM chip IC100. If LD803 is illuminated, +3.3V is ok. Only half of the dual LED is
used.
LD803
MAIN
PWB
MAIN BOARD TUNER ChECk
For easy access, pop the shield off the tuner. If you leave the shield on you can still access
the same pins, but be careful not to accidentally ground out your test lead on the shield.
Note: This is a picture from a different model, but the concept is the same.
Pin 14 Audio SIF
Pin 16 Composite Video
Pin 3 Tuner B+ (5V)
CIRCUIT DeSCRIPTIONS
Pin 14
Fall 2008 LCD Training Fall 2008 LCD Training
4
2
L
G
Pin 16
6
0
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