Record Of Use Check; Self Diagnostics Log Check - Sony MVC-FD85 Service Manual

4. Record of Use check

Page D Address 6C to 6F
Address Function
6C Recording counter
6D (Hexadecimal)
6E
6F Recording counter (Hexadecimal) /
MC CAM emergency
Note: When replacing the floppy disk drive unit, initialize these data.
Using method:
1) The recording counter data is displayed at page: D, addresses:
6C to 6F. These data are named D
respectively.
2) Convert D , D , D and D
6C 6D 6E
D ', D ', D ' and D '.
6C 6D 6E 6F
(Refer to Table 5-2-1. "Hexadecimal-decimal conversion table")
3) Calculate the recording counter (N) using following equation.
(Decimal calculation)
' × 256 + D
N = D ' + D
6C 6D
Initializing method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 6C to 6F, and write data: 00 to each
address.
Note: Press the PAUSE button of the adjustment remote commander
each time to set the data.
3) Select page: 0, address: 01, and set data: 00.

5. Self Diagnostics Log check

Page 2 Address 90 to A2
Address
90 1st error occurrence code
91
92
93 2nd error occurrence code
94
95
96 3rd error occurrence code
97
98
99 4th error occurrence code
9A
9B
9C 5th error occurrence code
9D
9E
9F 6th error occurrence code
A0
A1
A2 Numbers of error occurrence (0 to 6)
Using method:
1) The self diagnostics log is displayed at page: 2, addresses: 90
to A2.
Note: This data will be erased when the battery or DC power supply
is removed.
Counter data 1
Counter data 2
Counter data 3
Counter data 4
Note: When this data is "80" to "FF", the MC CAM (FC-72 board IC501) is abnormal.
, D , D and D
6C 6D 6E
to decimal notation, and obtain
6F
' × 65536 + D ' × 16777216
6E 6F
Function
Remarks
6F
Example:
C : 32 : 01
Note: "C" → "01"
"E" → "03"
5-42
Address : 92, 95, 98, 9B, 9E, A1
Address : 91, 94, 97, 9A, 9D, A0
Address : 90, 93, 96, 99, 9C, 9F (Note)