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Sony CDU31A Series Service Manual page 58

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3-6 TYPE OF ERROR
3-6-1 Sum Error
In order to check data within 'User Data, Check Sum is
recorded in the last 2 bytes ( 16 bits) of this area.
3-6-2 Address Error
The Addi" that the drive detects differs from Header Addr
and Data Addr.
3-6-3 Hardware Error
Some commands (6, 5, 4) bit are set I when Tray, Eject, or
Spindle motor error occurred.
a.
Tray
The drive detects that YHDS-50 doesn't insen a drive
during testing.
b.
Eject Button
The drive detects that Eject Button is pressed during.
testing.
c.
Spindle Motor
The drive detects that spindle motor doesn't rotate
during testing.
3-6-4 Disc Type Error
This type of error is classified as follows.
NO DISC
ILLEGAL DISC
AUDIO TRACK
CD-ROM TRACK
OTHER MODE
MODE 0
3-6-S Seek Error
This type of error is classified as follows.
BLOCK NOT FOUND
LEAD OUT AREA
DISC NOT READABLE
END OF TRACK
3-6-6 Data Error
The drive detects the error that occurred in data area.
a.
Not Cor Retry
I
Correct Retry
These items mean number of retry.
b.
Not Cor L-EC
I
Correct L-EC
These items are effective when parameter of L-EC is
set to" ON".
3-15

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