Pioneer PDR-L77 Service Manual page 53

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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 the RECORD button.
(4) Press the REC MUTE button. The LED for confirmation of LD emission will light in red. The LD is emitting in this status.
Adjustment of CD-R record power
(5) Turn VR163 clockwise until the adjusted value is 4.60 mW ± 0.1 mW.
Adjustment of CD-R overdrive power
(6) Turn VR162 clockwise until the adjusted value becomes adjustment value at Step 5 above + (0.1 mW ± 0.01 mW).
(7) Press the STOP button to shut off the LD.
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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 the RECORD button.
(4) Press the REC MUTE button. The LED for confirmation of LD emission will light in red. The LD is emitting in this status.
Adjustment of BIAS power
(5) Turn VR141 clockwise until the adjusted value is 0.40 mW ± 0.05 mW.
Adjustment of CD-RW record power
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(6) Turn VR161 clockwise until the adjusted value is 2.00 mW ± 0.1 mW.
Adjustment of CD-RW erase power
(7) Turn VR164 clockwise until the adjusted value is 5.70 mW ± 0.1 mW.
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(8) Press the STOP button to shut off the LD.
http://www.xiaoyu163.com
Pickup objective lens
VR163 (R REC), VR162 (R O.D.)
VR163 : 4.60 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 : 0.40 mW ± 0.05 mW
VR161 : 2.00 mW ± 0.1 mW
VR164 : 5.70 mW ± 0.1 mW
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http://www.xiaoyu163.com
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DANGER – LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
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DANGER – LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
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PDR-L77
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