Cd-R Record Power Adjustment; Cd-Rw Record Power Adjustment - Pioneer pdr-w739 Service Manual

PDR-W739

6.4.2 CD-R Record Power Adjustment

Test Point
Adjustment Point
Adjustment Value
[Procedure]
(1) Turn VR163 and VR162 completely counterclockwise to set their power output to minimum.
(2) Press the ERASE button once so that "CD-R" appears on the FL display.
If the indication is "CD" or "CD-RW," press the ERASE button repeatedly until "CD-R" is displayed on the FL display.
(3) Press continuing the REC/REC MUTE button twice.
The LD is emitting in this status.
Adjustment of CD-R record power
(4) Turn VR163 clockwise until the adjusted value is 4.80 mW ± 0.1 mW.
Adjustment of CD-R overdrive power
(5) Turn VR162 clockwise until the adjusted value becomes adjustment value at Step (4) above + (0.1 mW ± 0.01 mW).
(6) Press the STOP button to shut off the LD.

6.4.3 CD-RW Record Power Adjustment

Test Point
Adjustment Point
Adjustment Value
[Procedure]
(1) Turn VR141, VR161 and VR164 completely counterclockwise to set their power output to minimum.
(2) Press the ERASE button twice so that "CD-RW" appears on the FL display.
If the indication is "CD" or "CD-R," press the ERASE button repeatedly until "CD-RW" appears on the FL display.
(3) Press continuing the REC/REC MUTE button twice.
The LD is emitting in this status.
Adjustment of BIAS power
(4) Turn VR141 clockwise until the adjusted value is 0.60 mW ± 0.05 mW.
Adjustment of CD-RW record power
(5) Turn VR161 clockwise until the adjusted value is 1.30 mW ± 0.1 mW.
Adjustment of CD-RW erase power
(6) Turn VR164 clockwise until the adjusted value is 5.60 mW ± 0.1 mW.
(7) Press the STOP button to shut off the LD.
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Pickup objective lens
VR163 (R REC), VR162 (R O.D.)
VR163 : 4.80 mW ± 0.1 mW
VR162 : Addition of 0.1 mW ± 0.01 mW to the adjustment value of VR163
Pickup objective lens
VR141 (RW BIAS), VR161 (RW REC), VR164 (RW ERASE)
VR141 : 0.60 mW ± 0.05 mW
VR161 : 1.30 mW ± 0.1 mW
VR164 : 5.60 mW ± 0.1 mW
DANGER – LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
DANGER – LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.