Focus Servo is unstable
Is FE signal
output normal in Focusing
Up/Down?
(LIC121 pin25*)
Check Pickup Read Power
is 1.3~1.7mW?
YES
Replace LIC121.
Replace the Pick up.
Go to “Focus Actuator
operating is abnormal”
NO
NO
Is FDRV signal
output normal in Focusing
Up/Down?
(LIC201 pin 62)
Replace LIC201.
NO
YES
Focus Actuator operating is
abnormal
Is there Focus
Search control signal input?
(LIC301 pin5)
Is DRVMUTE2 signal “H”?
(LIC301 pin 35)
Replace LIC301.
Check the connection
LPM101 pin40, 41.
Check the connection of LIC121 pin 32.
Replace LIC121.
NO
YES
Replace the Pick-Up.
Is there Focus
Search drive voltage output?
(LIC301 pin 51,52)
NO
• Check the connection of LIC201 pin 62.
• Check the communication line between
LIC121 and LIC201.
• Replace LIC201.
YES
NO
YES
* LIC121 pin25 is MOUT2(FEP Monitor2).
After disc recognition action, Monitor port
is off. So, please check FE signal during
disc recognition.