Pioneer DVR-104 Service Manual page 41

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[Write Power High Adjustment]
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"0AW"
Adjust with UP/DN command so that the indication of light power meter becomes 10.19 ± 0.1mW.
"EE" (Store the adjustment value in the nonvolatile memory)
[Erase Power Low Adjustment]
"3AW"
Adjust with UP/DN command so that the indication of light power meter becomes 3.74 ± 0.1mW.
"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 6.97 ± 0.1mW.
"EE" (Store the adjustment value in the nonvolatile memory)
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]
(2) CD Power Adjustment
• Set the wavelength of the light power meter to 780 nm, and shine the sensor to the objective lens.
(2.1) Playback Power Adjustment
Objective
Symptom when out
TE of adjustment
L 13942296513
Measurement Instru-
ment connections
Adjustment standard
value
[Procedure]
"0DT" (Selects CD-ROM mode)
"LD" (LD ON)
Adjust VR2 so that the indication of light power meter becomes 1.44 ± 0.03mW.
"LD" (LD FF)
Note: When confirm the output power once again after the Playback Power Adjustment, if indication of the light power meter
is limit of 1.44 ± 0.06mW, there is not a problem.
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To optimize the playback power of laser diode (LD).
When a gap is terrible : Player does not playback, 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
Wavelength 780nm,
1.44 ± 0.03mW (Ave.)
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Player state
Adjustment
location
Disc
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DVR-104
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STOP
VR2
None needed
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A
B
C
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D
E
F
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