50
PDR-555RW
6.4 ADJUSTMENT 1 (LASER DIODE POWER ADJUSTMENT)
CN102
Fig. 4 Adjustment points
VR104
RW REC.PW0
VR101
PB. PW
VR103
R REC.PW2
VR102
R REC. PW1
VR105
RW REC.
PW1
VR106
RW REC.
PW2
CN354
1
1
6
6
SERVO DIGITAL ASSY
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
The following adjustments 1 through 3 must be done with the Input
Selector set to the Analog position (LD power adjustment mode).
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 VR101 to VR106, 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.
[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) Press the RECORD button. The LED for confirmation of LD emission will light in orange.
(3) Press the REC MUTE button. The LED for confirmation of LD emission will light in red. The LD is emitting in this status.
(4) Turn VR101 clockwise until the adjustment value to be reached is obtained.
(5) 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)
0.60 mW
±
0.05 mW
Summary of Contents for PDR-V500
Page 25: ...PDR 555RW 23 ...
Page 43: ...PDR 555RW 41 A B C D 1 2 3 4 1 2 3 4 I H H POWER ASSY I TRANS ASSY PNP1446 A PNP1456 A SIDE B ...
Page 45: ...PDR 555RW 43 A B C D 5 6 7 8 5 6 7 8 J H CN51 IC701 PNP1456 A ...
Page 69: ...67 PDR 555RW FL TUBE 7 1 2 DISPLAY PEL1097 FUNCTION ASSY V701 Anode Grid Assignment 1 35 ...
Page 70: ...68 PDR 555RW Pin Assignment ...
