Sony MDS-JE700 - Mini Disc Player Service Manual page 7

Reading the Retry Cause Display
Higher Bits
Hexadecimal
8 4 2 1 8
Bit
b7 b6 b5 b4 b3 b2 b1 b0
Binary
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 1
0 0 0 1 0
0 0 1 0 0
0 1 0 0 0
1 0 0 0 0
*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 "CLV unlock" 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
0 0000
1 0001
2 0010
3 0011
4 0100
5 0101
6 0110
7 0111
Lower Bits
Hexa-
Cause of Retry
4 2 1
decimal
00 Spindle is slow
0 0 0
01 shock *1
0 0 1
02 ader5
0 1 0
Discontinuous address
1 0 0 04
(Not used)
0 0 0 08
FCS incorrect
0 0 0 10
IVR rec error
0 0 0 20
40 CLV unlock
0 0 0
80 Access fault
0 0 0
Hexadecimal Binary
8
1000
9
1001
A
1010
B
1011
C
1100
D 1101
E 1110
F 1111
When spindle rotation is detected as slow
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 CLV is unlocked
When access operation is not performed normally
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Occurring conditions