LG RH7521W Service Manual page 75

Track Servo is unstable
Is TE signal
output normal in focusing
ON and tracking OFF?
(LIC201 pin 85)
YES
Is TE signal
input normal in focusing
ON and tracking OFF?
(LIC301 pin 133)
YES
Is there TDRV
signal output in tracking ON?
(LIC301 pin 125)
YES
Check the LIC502 and pick-up referring to
"Focus Actuator operating is abnormal".
NO
(E, F, G, H)output normal?
(LCN201 pin 5, 8, 9, 12)
Replace the LIC201.
•Check the pick-up FFC.
•Replace the pick-up.
•After replacing Perform 5. Optical Power Setting
from'How to use Test tool'.
NO
Check the connection between
LIC301(pin133)and LIC201 pin 85.
NO
Is pick-up
YES
Replace the LIC301.
NO