Sony MDS-JD320 service manual Reading the Display, Example, Hexadecimal nBinary Conversion Table

Reading the Retry Cause Display

	Higher Bits				Lower Bits				Hexa-
										Cause of Retry	Occurring conditions
Hexadecimal	8	4	2	1	8	4	2	1
									decimal
Bit	b7	b6	b5	b4	b3	b2	b1	b0
Binary	0	0	0	0	0	0	0	0	00	Spindle is slow	When spindle rotation is detected as slow
	0	0	0	0	0	0	0	1	01	(Not used)	(Not used)
	0	0	0	0	0	0	1	0	02	ader5	When ADER was counted more than
											five times continuously
	0	0	0	0	0	1	0	0	04	Discontinuous address	When ADIP address is not continuous
	0	0	0	0	1	0	0	0	08	(Not used)	(Not used)
	0	0	0	1	0	0	0	0	10	FCS incorrect	When not in focus
	0	0	1	0	0	0	0	0	20	IVR rec error	When ABCD signal level exceeds the specified range
	0	1	0	0	0	0	0	0	40	CLV unlock	When CLV is unlocked
	1	0	0	0	0	0	0	0	80	Access fault	When access operation is not performed normally

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 nb6

Lower bit : 2 = 0010 nb1

In this case, the retry cause is combined of “CLV unlock” and “ader5”.

When A2 is displayed:

Higher bit : A = 1010 nb7+b5

Lower bit : 2 = 0010 nb1

The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.

Hexadecimal nBinary Conversion Table

Hexadecimal	Binary	Hexadecimal	Binary
0	0000	8	1000
1	0001	9	1001
2	0010	A	1010
3	0011	B	1011
4	0100	C	1100
5	0101	D	1101
6	0110	E	1110
7	0111	F	1111

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