Pioneer DVR-104 Service Manual page 42

1
QQ
(2.2) Recording Power Adjustment
3 7 63 1515 0
Objective
A
Symptom when out
of adjustment
Measurement Instru-
ment connections
Adjustment standard
value
B [Procedure]
[Write Power Low Adjustment]
"0DT" (Selects CD-ROM mode)
"1AW"
Adjust with UP/DN command so that the indication of light power meter becomes 7.47 ± 0.1mW.
"EE" (Store the adjustment value in the nonvolatile memory)
[Write Power High Adjustment]
"0AW"
Adjust with UP/DN command so that the indication of light power meter becomes 14.22 ± 0.1mW.
"EE" (Store the adjustment value in the nonvolatile memory)
C
[Erase Power Low Adjustment]
"3AW"
Adjust with UP/DN command so that the indication of light power meter becomes 5.22 ± 0.1mW.
TE
L 13942296513
"EE" (Store the adjustment value in the nonvolatile memory)
[Erase Power High Adjustment]
"2AW"
Adjust with UP/DN command so that the indication of light power meter becomes 9.72 ± 0.1mW.
"EE" (Store the adjustment value in the nonvolatile memory)
D
[Peak Power Low Adjustment]
"5AW"
Adjust with UP/DN command so that the indication of light power meter becomes 8.82 ± 0.1mW.
"EE" (Store the adjustment value in the nonvolatile memory)
[Peak Power High Adjustment]
"4AW"
Adjust with UP/DN command so that the indication of light power meter becomes 10.17 ± 0.1mW.
"EE" (Store the adjustment value in the nonvolatile memory)
E
About the following adjustment items, a microcomputer performs automatic adjustment.
[Write Power Low PD Gain Adjustment]
[Write Power High PD Gain Adjustment]
[Erase Power Low PD Gain Adjustment]
[Erase Power High PD Gain Adjustment]
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42
1
http://www.xiaoyu163.com
2
To optimize the Recording power of laser diode (LD).
When a gap is terrible : Player does not Recording, track search is impossible
When a gap is light : RF waveform is dirty.
Shine the light emitted from the objective
lens on the light power meter sensor.
Wavelength 780nm Ave. mode
x ao
y
. i
2
http://www.xiaoyu163.com
3
8
Player state
Adjustment
location
Disc
Q Q
3 6 7 1 3
u163
.
DVR-104
3
4
2 9 9 4 2 8
STOP
Set the value with the command
None needed
1 5 0 5 8 2 9 9 4
m
co
4
9 9
2 8 9 9