Read Sony DVP-NW50 (serv.man2) Service Manual online
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6-3. Electrical adjustment
(1) RF level and waveform check
Please check it with correct test CD/CD-RW/DVD-SL/DVD-DL discs.
(2) Iop check (CD/DVD)
Please check Iop to check the damage of OP.
If Iop is out of specification, OP was damaged.
If Iop is out of specification, OP was damaged.
(3) Playability check
CD Vertical deviation (140um)
CD Eccentricity (140um)
CD-RW Low reflection disc
CD-RW Finger print
DVD Eccentricity (100um)
CD Eccentricity (140um)
CD-RW Low reflection disc
CD-RW Finger print
DVD Eccentricity (100um)
For checking of the playability, please check RF level and waveform.
To prevent re-repair by the static electricity damage of Optical block, please
check Iop.
check Iop.
If Iop is out of specification, the Optical block was damaged by static electricity
and will be dead in near future.
and will be dead in near future.
For servo operation checking, please confirm the playability by each types of test
disc.
disc.
If servo operation is not good, there is a problem in playing the test discs.
If there is no problem in these checking, please check the customer’s disc.
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