SONY MDSJA555ES
Service Manual

Reading the Display: Convert the hexadecimal display of each digit into binary display. If more than two causes, they will be added. Example When 42 is displayed: Higher bit: 4 = 0100 � b6 Lower bit: 2 = 0010 � b2 In this case, the retry cause is combined of �CLV unlock� and �ader5�. Example When A2 is displayed: Higher bit: A = 1010 � b7+b5 Lower bit: 2 = 0010 � b1 In this case, the retry cause is combined of �ACCESS default�, �IVRrec� and �ader5�. The reading of the track mode display is as follows.

Hexadecimal Bit Binary

Higher Bits 8421 b7 0 0 0 0 0 0 0 1 b6 0 0 0 0 0 0 1 0 b5 0 0 0 0 0 1 0 0 b4 0 0 0 0 1 0 0 0

Lower Bits 8421 b3 0 0 0 1 0 0 0 0 b2 0 0 1 0 0 0 0 0 b1 0 1 0 0 0 0 0 0 b0 1 0 0 0 0 0 0 0

Hexadecimal When 0 01 02 04 08 10 20 40 80 Emphasis OFF Monaural 2-bit display, normally 01 01: Normal audio, Other: Invalid Audio (normal) Original Copyright exists Writing is prohibited

Contents When 1 Emphasis OFF Stereo

Invalid Digital copy No copyright Writing is allowed

Reading the Display: Convert the hexadecimal display of each digit into binary display. The several causes are added and displayed. Example When 84 is displayed: Higher bit: 8 = 1000 � b7 Lower bit: 4 = 0100 � b2 This example shows that �Emphasis: OFF�, �Monaural�, �Original�, �Copyright exists� and �Writing is allowed� because b2 and b7 are 1 while all other bits are 0. Example When 07 is displayed: Higher bit: 0 = 0000 � all 0 Lower bit: 7 = 0111 � b0+b1+b2 This example shows that �Emphasis: ON�, �Stereo�, �Original�, �Copyright exists� and �Writing is prohibited� because b0, b1 and b2 are 1 while all other bits are 0.

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

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