LG LPA-735 Service Manual page 20

F. PICTURE ABNORMAL
PICTURE ABNORMAL
YES
Check the disc.
YES
Refer to Servo part
YES
If OK
Check MPEG_CLK
Signal of MPEG part
YES
YES(If OK)
Check MPEG (IC 2U1)
YES
YES(If OK)
Replace B/D
H. OPEN/CLOSE ABNORMAL
OPEN/CLOSE
ABNORMAL
YES(If OK)
Check 2SW1 switch
YES
Check IC(2U1) Pin 158
YES
Refer to SERVO part.
NO
Check the connectin of
MD.
Refer to SERVO part.
G. DISC ERROR
DISC ERROR
YES
Check Disc
YES
Refer to Servo part
YES
Replace B/D
YES
3-13
YES(If OK)
YES(If OK)