LG LX-U150X, Service Manual

Page: 12 / 51

- 2-5 -
• AUDIO PART
TROUBLESHOOTING
P-SENS PART
Does +5V appear at ZD902?
YES
NO
POWER CIRCUIT
Check the DC output
Of C914(+)
Check the DC 9V
Output of IC903
END
NO
YES
NO
NO
YES
YES
NO
YES
NO
YES
NO
YES
NO
YES NO
YES
IC300 PIN 26 Check
Check the Fuse
Check the DC 6.02V
Output of IC902
Check the 5V of Q9011 "C"
(CD FUNCTION)
Replace the fuse
Check the DC voltage of
CN901 Pin3,4
Replace the
Transformer
Replace the
Transformer
Replace the D908,909
910,911
Check the DC voltage of
CN901 Pin 8 , Pin 9
Replace the D908,909,
910,911
Replace the D902,903
Check the "High" of
Q902 "B"
Replace the Q901
Check the "High"
Of CN601 pin7
D920 , CN901 Check