LG RCT689H Service Manual page 129

Recognition fail case 2 : DVD Disc
Check pick-up
read power was
1.1~1.3mW.
YES
Is there RF signal
at LIC101 pin78?
YES
Is there
RF signal at LIC101
pin88(RFP) and
pin87(RFN)?
YES
Check again
after the replace
LIC101 It is OK?
YES
OK
Recognition fail case 3 :
Blank DVD+R/RW
Is there WBL
(LIC101 pin63)
Signal?
YES
Replace LIC101.
NO
NO
NO
NO
Is there WBL
NO
(LIC201 pin63)
Signal?
YES
Check the connection
between LIC101 and LIC201.
5-10
Go to "LD CHECK".
Replace the Pickup.
Replace the LIC101.
Replace the LIC201.
NO
Replace LIC201.