HCD-C5
2.PRECAUTIONS FOR CHECKING LASER DIODE EMISSION
To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your
3.PRECAUTIONS FOR USE OF OPTICAL PICK-UP (KMS-260B/260E)
As the laser diode in the optical
Before disconnecting the connector, solder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.
flexible board | |
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laser tap
Optical
4. PRECAUTIONS FOR ADJUSTMENTS
1.When replacing the following parts, perform the adjustments and checks with in the order shown in the following table.
2.Set the MD test mode when performing adjustments. After completing the adjustments, exit the MD test mode. Perform the adjustments and checks in “Group Service” of the MD test mode.
3.Perform the adjustments to be needed in the order shown.
4.Use the following tools and measuring devices.
•Check Disc
•Test Disk
•Laser power meter
or MD Laser power meter 8010S (Part No. :
•Oscilloscope (Measure after performing CAL of prove.)
•Digital voltmeter
•Thermometer
•Jig for checking BD (MD) board waveform (Part No. :
5.When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope.
(VC and ground will become
6.Using the above jig enables the waveform to be checked without the need to solder.
(Refer to Servicing Notes on page 6.)
7.As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it.
*1 Laser power meter
When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (Part No.
It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of optical
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Adjustment |
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Optical | IC101 | IC102 | IC151 | IC190 | IC195 | D101 | |
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7. Initial setting of adjustment value
8.Recording of Iop information
9.Temperature compensation offset adjustment
10.Laser power adjustment
11.Iop NV Save
12.Traverse adjustment
13.Focus bias adjustment
16.Auto gain control output level adjustment
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