Audio Output When You Turn The Unit On - LG DP132 Service Manual

3. NO AUDIO OUTPUT WHEN YOU TURN THE UNIT ON
When you plug power cord and turn the unit on, LED light will turn red, the unit will read
disc nornally, but it won't have audio output.
3-1. Please check the solder joint status of main board connector P1.
If P1 has cold solder joint, P1 pins should be oxidated, and please replace P1.
3-2. Please check the working status of main board IC U927.
If output voltage 5 V from U927 pin7 is not normal, please check 5 V power circuit of main board.
If AL and AR signal from U927 pin1, pin2, pin9, pin10 is not normally output, please check if U927 is in failure.
3-3. Please check the working status of main board IC U1.
If AL and AR signal from U1 pin65, pin66 is not normally output, please check if U1 is in failure.
ONE POINT REPAIR GUIDE
P1 U927
< Main Board Top View >
U1
3-8