Sony MDS-SP55 Service Manual page 11

Reading the Track Mode 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 1
0 0 0 1 0
0 0 1 0 0
0 1 0 0 0
1 0 0 0 0
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 t b7
Lower bit : 4 = 0100 t b2
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", "Monaural",
"Original", "Copyright exists", and "Write allowed".
Example When 07 is displayed:
Higher bit : 0 = 1000 t All 0
Lower bit : 7 = 0111 t b0+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 t Binary Conversion Table
Hexadecimal Binary
0 0000
1 0001
2 0010
3 0011
4 0100
5 0101
6 0110
7 0111
Lower Bits
Hexa-
4 2 1
decimal
01
0 0 1 Emphasis OFF
0 1 0 02 Monaural
04
1 0 0 This is 2-bit display. Normally 01.
08
0 0 0 01:Normal audio. Others:Invalid
0 0 0 10 Audio (Normal)
0 0 0 20 Original
40
0 0 0 Copyright
0 0 0 80 Write prohibited
Hexadecimal Binary
8
1000
9 1001
A
1010
B
1011
C 1100
D
1101
E
1110
F 1111
Details
When 0
Emphasis ON
Stereo
Invalid
Digital copy
No copyright
Write allowed
When 1
11