Sony MDS-PC1 Service Manual page 8

Reading the Display:
Convert the hexadecimal display into the binary display. If more than two causes, they will be added.
Example
When 44 is displayed:
Upper bit : 4=0100 n b6
Lower bit : 4=0010 n b2
In this case, the retry cause is combined of "CVL unlock" and "ader5".
When A4 is displayed:
Upper bit : A=1010 n b7+b5
Lower bit : 4=0010 n b2
The retry cause in this case is combined of "access fault", "IVR rec error", and "ader5".
Reading the Track Mode Display
Higher Bits
Hexadecimal
8 4 2 1
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 1 0
0 1 0 0
1 0 0 0
Reading the Display:
Convert the hexadecimal display into the binary display. Several cause are added and displayed.
Example
When 84 is displayed:
Upper bit : 8=1000 n b7
Lower bit : 4=0100 n b2
In this case, as b2 and b7 are 1 and others are 0, the cause is combined of "Emphasis OFF", "Monaural", "Original", Copyrighted" and
"Write permitted".
When 07 is displayed:
Upper bit : 0=0000 n all 0
Lower bit : 7=0111 n b0+b1+b2
In this case, as b0, b1, and b2 are 1 and others are 0, the cause is combined of "Emphasis ON", "Stereo", "Original", Copyrighted" and
"Write prohibited".
Hexadecimal/Decimal Conversion Table
Hexadecimal Binary
0 0000
1 0001
2 0010
3 0011
4 0100
5 0101
6 0110
7 0111
Lower Bits
Hexa-
8 4 2 1
decimal
01 Emphasis OFF
0 0 0 1
02
0 0 1 0 Monaural
0 1 0 0 04 This is 2-bit display. Normally 01.
08
1 0 0 0 01:Normal audio. Others:Invalid
10
0 0 0 0 Audio (Normal)
0 0 0 0 20 Original
40
0 0 0 0 Copyright
0 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
– 8 –
When 1
Emphasis ON
Stereo
Invalid
Digital copy
No copyright
Write allowed