Sony HCD-MD373 service manual Hexadecimal nBinary Conversion Table

Reading the Track Mode Display

	Higher Bits				Lower Bits				Hexa-		Details
Hexadecimal	8	4	2	1	8	4	2	1
									decimal
Bit	b7	b6	b5	b4	b3	b2	b1	b0		When 0		When 1
Binary	0	0	0	0	0	0	0	1	01	Emphasis OFF		Emphasis ON
	0	0	0	0	0	0	1	0	02	Monaural		Stereo
	0	0	0	0	0	1	0	0	04	This is 2-bit display. Normally 01.
	0	0	0	0	1	0	0	0	08	01:Normal audio. Others:Invalid
	0	0	0	1	0	0	0	0	10	Audio (Normal)		Invalid
	0	0	1	0	0	0	0	0	20	Original		Digital copy
	0	1	0	0	0	0	0	0	40	Copyright		No copyright
	1	0	0	0	0	0	0	0	80	Write prohibited		Write allowed

Reading the Display:

Convert the hexadecimal display into binary display. If more than two causes, they will be added.

Example When 84 is displayed: Higher bit : 8 = 1000 nb7 Lower bit : 4 = 0100 nb2

In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis OFF”, “mo naural”, “original”, “copyright exists”, and “write allowed”.

Example When 07 is displayed: Higher bit : 0 = 1000 nAll 0 Lower bit : 7 = 0111 nb0+b1+b2

In this case, as b0, b1, and b2 are 1 and others are 0, it can be determined that the retry cause is combined of “emphasis ON”, “stereo”, “original”, “copyright exists”, and “write prohibited”.

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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