— 6 —
Reading the Retry Cause Display
Hexadecimal
Bit
Binary
Higher Bits Lower Bits
84218421
b7 b6 b5 b4 b3 b2 b1 b0
00000001
00000010
00000100
00001000
00010000
00100000
01000000
10000000
When more than 3.5 shocks are detected
When ADER was counted more than
five times continuously
When ADIP address is not continuous
(Not used)
When not in focus
When ABCD signal level exceeds the specified range
When spindle rotation is detected as slow
When access operation is not performed normally
Hexa-
decimal
shock *1
ader5
Discontinuous address
(Not used)
FCS incorrect
IVR rec error
Spindle is slow
Access fault
Cause of Retry Occurring conditions
01
02
04
08
10
20
40
80
*1 Some displays are not used depending on the microprocessor version.
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example
When 42 is displayed:
Higher bit : 4 = 0100 n b6
Lower bit : 2 = 0010 n b1
In this case, the retry cause is combined of “spindle is slow” and “ader5”.
When A2 is displayed:
Higher bit : A = 1010 n b7+b5
Lower bit : 2 = 0010 n b1
The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.
Hexadecimal
n
Binary Conversion Table
Hexadecimal Binary Hexadecimal Binary
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Reference:
In this test mode, when the · button is pressed, and the disc is played back, the “PLAYBACK MODE” is set.
The display becomes as shown in Fig. 2. The playback mode is not used in particular during servicing.
44 ¢¢¢¢¢¢ p
Fig. 2 Display during Playback Mode
44 : Parts No. (Name of area named on TOC)
¢¢¢¢¢¢ : Address (Physical address on disc)
p : Track mode (Copyright information of each part, information on copyright, etc.)
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