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No
Yes
Message "NO DISC" appears even if a normal
disc is loaded.
*1: When the cover of disc insertion block is opened or closed
Set to service position (A).
Does the voltage
at R7003 (DOOR_SW)
vary?
(*1)
Replace the lock unit.
Replace the MAN
circuit board.
List of check points
Symptom
Circuit board
(side)
Location on
circuit board
Lead wire
soldered
or not
R7003
MAN (B)
4E
Need not
No
Yes
Recognition of disc does not start even if a
normal disc is loaded.
*1: When the cover of disc insertion block is opened or closed
Set to service position (A).
Does the voltage
at R7003 (DOOR_SW)
vary?
(*1)
Replace the lock unit.
Replace the MAN
circuit board.
List of check points
Symptom
Circuit board
(side)
Location on
circuit board
Lead wire
soldered
or not
R7003
MAN (B)
4E
Need not
Message "Disc is not formatted. Format the disc
now?" appears even if a formatted disc is loaded.
Replace the disc drive unit
Message "Write protected. Check disc" appears
even if a disc with no write-protect is loaded.
Replace the disc drive unit.
Message "DISC ACCESS" does not disappear
even if a normal disc is loaded.
Replace the disc drive unit.
Troubleshooting > Trouble Diagnosis