LG RCT689H Service Manual page 126

Focus servo is unstable
Is FE signal
output normal in focusing
Up/Down? (LIC101
pin22*)
YES
Is FDRV signal
output normal in focusing
Up/Down? (LIC201
pin 69)
YES
Go to "Focus actuator
operating is abnormal"
Focus actuator
operating is abnormal.
Is there focus
search control signal input?
(LIC301 pin6)
YES
Is there
focus search drive
voltage output? (LIC301
pin7, 8)
YES
Check the connection
LPM101 pin5, 6.
Replace the pick-up.
Check Pickup
NO
Read Power is
1.3~1.7mW?
YES
Replace the LIC101.
NO
Replace the LIC201.
• Check the connection of LIC201 pin69.
NO
• Check the communication line between
LIC101 and LIC201.
• Replace the LIC201.
NO
Is CTL2 signal "H"?
(LIC301 pin17)
YES
Replace the LIC301.
5-7
NO
Replace the Pick up.
* LIC101 pin22 is MOUT2(FEP Monitor2).
After disc recognition action, Monitor port is
off. So, please check FE signal during disc
recognition.
Check the connection of
NO
LIC101 pin127.
Replace the LIC101.