Pioneer BDP-05FD Service Manual page 42

1
[How to acquire various data]
A
• Command for measuring the LD degradation rate
Use the Write Buffer command.
After entering btr[0] = 99 and btr[1] = 50 to the Write Buffer,
issue the "PKT:3b 02 e1 00 00 00 00 00 20 00 00 00" packet command.
• Command for acquiring the LD degradation rate
Use the Read Buffer command.
When the "PKT:3c 02 e1 00 00 00 00 00 20 00 00 00" is issued, the following data are stored in the Read Buffer.
<How to read the Read Buffer>
CD degradation rate (%) : data[15]/data[16] (Most Significant Byte: data[15], Least Significant Byte: data[16])
DVD degradation rate (%) : data[3]/data[4]
B BD degradation rate (%)
Current temperature
Temperature at the time of CD adjustment : data[17]/data[18] (Most Significant Byte: data[17], Least Significant Byte: data[18])
Temperature at the time of DVD adjustment : data[11]/data[12] (Most Significant Byte: data[11], Least Significant Byte: data[12])
Temperature at the time of BD adjustment : data[13]/data[14] (Most Significant Byte: data[13], Least Significant Byte: data[14])
Temperature (ºC) = Acquired temperature value x 0.25
Example: When the acquired temperature value is 64h: Temperature = 64h x 0.25 = 25 (ºC)
The value for the LD degradation rate is that before correction. Perform temperature correction.
• On temperature correction coefficien
CD 6%/10ºC, DVD 8%/10ºC, BD 10%/10ºC
C
<How to correct the temperature>
BD
1 2
D
DVD
3
4
E
CD
5 6
7
F
42
1
2
(Most Significant Byte: data[3], Least Significant Byte: data[4])
: data[5]/data[6] (Most Significant Byte: data[5], Least Significant Byte: data[6])
: data[7]/data[8] (Most Significant Byte: data[7], Least Significant Byte: data[8])
Coefficient A = 1 + Current temperature - Temperature at the time of BD adjustment
Current temperature: To be acquired with the Read Buffer command (data[7]/data[8] × 0.25)
Temperature at the time of BD adjustment: To be acquired with the Read Buffer command
0.1 : BD temperature correction coefficient
1 Degradation rate of the LD for BD = Degradation rate of BD/Coefficient A
Degradation rate of BD: To be acquired with the Read Buffer command (data[5]/data[6])
2 OK/NG indication
OK: When the degradation rate of the LD for BD is less than 120%.
NG: When the degradation rate of the LD for BD is 120% or higher.
Coefficient B = 1 + Current temperature - Temperature at the time of BD adjustment
Current temperature: To be acquired with the Read Buffer command (data[7]/data[8] × 0.25)
Temperature at the time of DVD adjustment: To be acquired with the Read Buffer command
0.08 : DVD temperature correction coefficient
3 Degradation rate of the LD for DVD = Degradation rate of DVD/Coefficient B
Degradation rate of DVD: To be acquired with the Read Buffer command (data[3]/data[4])
4 OK/NG indication
OK: When the degradation rate of the LD for DVD is less than 120%.
NG: When the degradation rate of the LD for DVD is 120% or higher.
Coefficient C = 1 + Current temperature - Temperature at the time of BD adjustment
Current temperature: To be acquired with the Read Buffer command (data[7]/data[8] × 0.25)
Temperature at the time of CD adjustment: To be acquired with the Read Buffer command
0.06 : CD temperature correction coefficient
5 Degradation rate of the LD for CD = Degradation rate of CD/Coefficient C
Degradation rate of CD: To be acquired with the Read Buffer command (data[15]/data[16])
6 OK/NG indication
OK: When the degradation rate of the LD for CD is less than 120%.
NG: When the degradation rate of the LD for CD is 120% or higher.
7 Current temperature: To be acquired with the Read Buffer command (data[7]/data[8])
BDP-05FD
2
3
10
(data[13]/data[14] × 0.25)
10
(data[11]/data[12] × 0.25)
10
(data[17]/data[18] × 0.25)
3
4
× 0.1
× 0.08
× 0.06
4