LG RH178H Service Manual page 65

Tray operating is abnormal.
Tray open doesn't work.
YES
Is there Tray
control signal input?
(LIC301 pin 46)
YES
Is there Tray
drive voltage output?
(LIC301 pin 1,2)
YES
Check the connctor (LPF303).
Check the connction of LIC201 pin 66.
NO
Replace the LIC201.
Check the communication line
between LIC201.
NO
WhenLPF303 is open, Is
there Tray drive signal
output?
YES
4-4
Replace the LIC301.