Samsung HT-DM150 - Disc Presence;Absence Judgment

9-12 Samsung Electronics
4. Disc Presence/Absense Judgment
4
Disc Presence Judgment
Turn On Laser
Does lens move
with UP/DOWN
full stroke in focus
direction?
Does lens move
with UP/DOWN
full stroke in focus
direction?
Disc is presence
No Disc OK
Is focus search
voltage developed
at pin 11 of DU3?
Check
peripheral
circuit of MU9
Check BUS
line between
DU3 and DU5
Check connection between RU1 and RCN1.
Check BUS line RU1 and DU3.
Check RU1
N
Y
Y
Y
N
No signal
N
Normal