Disc Presence/Absense Judgment - Samsung HT-DL200 Service Manual

4. Disc Presence/Absense Judgment

Disc Presence Judgment
Turn On Laser
Does lens move
w ith UP/DOWN
full s stroke in in f f ocus
Check PI(pin36 of RV1)
signal and FE(pin42 of RV1)
Disc is presence
Samsung Electronics
4
N
direction?
Y
No signal
signal
Normal
Is f focus se s search
voltag developed
at pin 11 of DU3?
N
No Disc
N
Check connection between RU1 and RCN1.
Check BUS line RU1 and DU3.
Check RU1
Check
Y
peripheral
circuit of MU9
Check BUS
line between
DU3 and DU5
Y
OK
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