65
PDR-W739
6.4 ADJUSTMENT 1 (LASER DIODE POWER ADJUSTMENT)
[Procedure]
(1) Check that "CD" is displayed on the FL display. If "CD-R" or "CD-RW" is displayed, press the STOP button repeatedly until "CD" is
displayed.
(2) pushes continuing REC/REC MUTE key twice.
The LD is emitting in this status.
Playback Power Adjustment
(3) Turn VR101 clockwise until the adjustment value to be reached is obtained.
(4) Press the STOP button to shut off the LD.
6.4.1 Playback Power Adjustment
Pickup objective lens
Test Point
Adjustment Point
Adjustment Value
VR101 (PB. PW)
0.90 mW
±
0.05 mW
Fig. 4 Adjustment points
Playback power
Playback
CD-R recording
CD-R overdrive
CD-R record
power
CD-RW record power
CD-RW bias
power
CD-RW recording
Fig.5 Output power of the laser diode
CD-RW erase
power
Note 1 : Attach the remote sensor of the laser power meter to a
point angled away about 10 degrees against the pickup
lens and where the maximum power is detected, so that
there will be no light reflected onto the pickup.
Note 2 : When adjusting with VRs, first turn them completely
counter-clockwise and then adjust clockwise, so that the
value to be reached is not exceeded.
Note 3 : Set the wavelength of laser power meter to 780 nm.
Note 4 : Picking up is moved to the position adjusted easily
pushing "
41
" or "
¡¢
" key.
CN102
VR101
PB. PW
VR164
RW ERASE
VR163
R REC
VR141
RW BIAS
VR162
R O.D.
VR161
RW REC
1
1 : RF
2 : VC
3 : MPP
4 : TE
5 : VC
6 : FE
6
CD-R CORE ASSY
DANGER – LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
Содержание PDR-W739
Страница 20: ...PDR W739 20 A B C D 1 2 3 4 1 2 3 4 A2 5 A1 5 A5 5 A2 5 2 3 5 CD R CORE ASSY 3 5 3 5 A ...
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