Samsung DVD-R155 Service Manual page 30

Chassis: nexus (4th generation)
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Trouble Shooting
and pin4 deck power OK?
(between DVD loader & Main Assy)
of DIC3 pin26 normal?
5-8
Disc Ioading error
PZWZ1 pin1
(5v, 12v)
Yes
Is the 40pin FFC cable
inserted correctly?
Yes
Is the wavefrom
(MAIN PCB)
Yes
Change the deck
No
Replace Jack Assy
No
Reinsert FFC cable correctly
No
Change the Main board
DIC3-Pin26
Samsung Electronics

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