JRC JMR-92 Series Field Service Manual page 602

Step 4 Check operation.
After DVD drive replacement is completed, turn ON the circuit breaker for the power supply of
the display unit and check the operation as follows.
(1) Turn ON the display unit and start the Display Unit application. Insert DVD-ROM into the
DVD drive and check that there is no problem in reading the DVD-ROM.
This completes DVD drive replacement.
4-381 Chapter 4 Replacement procedure