Toshiba SD-P1850SN Service Manual page 9

1.3 The DVD drive does not work.
When the DVD drive does not work after the power is turned on, check the following items
and repair or replace the defective parts.
(1) Press the DISC cover switch and turn on the power. Then check whether or not
the optical pick-up lens of the DVD drive lights.
CAUTION: Visible laser radiation when open and interlock defeated. Do not stare into
Laser beam.
The optical pick-up lens lights dim:
It is caused by deterioration of the optical pick-up lens. Replace the DVD drive.
The optical pick-up lens does not light:
Check the connectors of the FPC with DVD drive. Also check the connection to the main
board and to the DVD drive.
Loose connection is found.
Connect FPC with DVD drive to Main Board firmly, and then check
the operation of the DVD drive again.
The DVD-FFC is broken.
Replace the DVD drive.
Other than the above.
Replace the DVD drive or the main board.
(2) Insert a DVD disc and turn on the power
The DVD drive does not work:
The motor of the DVD drive or the main board is defective. Replace the DVD drive
or the main board.
The DVD drive works but the initializing operation of the optical pick-up lens
does not start or abnormal noise sound:
The DVD drive is defective. Replace the DVD drive.
1.4 The operation of the DVD player stops at initializing display.
If the DVD player does not work after the initializing screen is displayed, check the
indication on the screen. Then repair the defect according to it.
(1) Insert a DVD disc and close the DISC cover, and turn on the power. Then check
the LCD screen or TV connected by AV cable.
The message "loading" is not displayed or the operation stops at the
message "Loading".
Since the DVD drive or the main board is defective, check in the following order:
1) DVD drive
2) Main board
The message "CHECK DISC" is displayed.
Check the DVD disc for fingerprints, dirt, etc.
If the DVD disc is OK, then check the following items:
1) Check the FPC with DVD drive
If a loose connection, connect it firmly.
If it is damaged, replace the DVD drive.
2) Other than above
For other cases, replace the unit in the following order:
DVD drive (defective optical pick-up)
Main board