DVR-104
40
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6.2.3 Power Adjustment
Shine the light emitted from the objective
lens on the light power meter sensor.
Wavelength 660nm Ave. mode
Wavelength 660nm,
1.03
±
0.03mW (Ave.)
[Procedure]
"5DT" (Selects 4.7R mode)
"LD" (LD ON)
Adjust VR1 so that the indication of light power meter becomes 1.03
±
0.03mW.
"LD" (LD OFF)
Note
: When confirm the output power once again after the Playback Power Adjustment, if indication of the light power
meter is limit of 1.03
±
0.06mW, ther is not a problem.
"1AW"
Adjust with UP/DN command so that the indication of light power meter becomes 5.34
±
0.2mW. (When enters the
"5UP/5DN", it can send every 5 step.)
"EE" (Store the adjustment value in the nonvolatile memory)
Before adjustment, turn VR1 and VR2 (periphery of CN101) fully counterclockwise to set their laser power output to
minimum.
(1) DVD Power Adjustment
• Set the wavelength of the light power meter to 660 nm, and shine the sensor to the objective lens.
(1.1) Playback Power Adjustment
(1.2) Recording Power Adjustment
Objective
Symptom when out
of adjustment
Player state
STOP
Adjustment
VR1
location
Disc
None needed
Measurement Instru-
ment connections
Adjustment standard
value
Shine the light emitted from the objective
lens on the light power meter sensor.
Wavelength 660nm Ave. mode
Player state
STOP
Adjustment
Set the value with the command
location
Disc
None needed
Measurement Instru-
ment connections
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.
Objective
Symptom when out
of adjustment
To optimize the Recording 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.
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