27
MDS-NT1
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 adjustment
6-4. AUTO CHECK
* The IC195 cannot be replaced with a new part.
For detail refer to “Notes on Replacing BD Board or MD Mechanism Deck” (See page 7).
5-5. 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 test mode when performing adjustments.
After completing the adjustments, exit the test mode.
Perform the adjustments and checks in “group Service” of the
test mode.
3. Perform the adjustments to be needed in the order shown.
4. Use the following tools and measuring devices.
• Check Disc (MD) TDYS-1 (Part No. : 4-963-646-01)
• Test Disk (MDW-74/GA-1) (Part No. : 4-229-747-01)
• Laser power meter LPM-8001 (Part No. : J-2501-046-A)
or
MD Laser power meter 8010S (Part No. : J-2501-145-A)*
1
• Oscilloscope (Measure after performing CAL of prove)
• Digital voltmeter
• Thermometer
• Jig for checking BD board waveform
(Part No. : J-2501-149-A)
• Attached software “OpenMG Jukebox”
(Part No. : 4-237-880-01)
• Software for test mode
(Distributed together with the Service Manual)
• Attached USB cable (Part No. : 1-757-471-11)
• Personal computer (Refer to Servicing Notes)
Optical
Pick-up
IC101
IC701
IC201
IC933
IC195
*
D101
5. When observing several signals on the oscilloscope, etc.,
make sure that VC and ground do not connect inside the oscil-
loscope.
(VC and ground will become short-circuited)
6. Using the above jig enables the waveform to be checked with-
out the need to solder.
(Refer to Servicing Note on page 8)
7. As the disc used will affect the adjustment results, make sure
that no dusts nor fingerprints are attached to it.
8. In normal operation check after the completion of adjustment,
be sure to perform the recording check (check in, check out)
using the software “OpenMG Jukebox” attached.
*
1
Laser power meter
When performing laser power checks and adjustment (electrical
adjustment), use of the new MD laser power meter 8010S (Part
No. : J-2501-145-A) instead of the conventional laser power me-
ter is convenient.
It sharply reduces the time and trouble to set the laser power
meter sensor onto the objective lens of optical pick-up.
Parts to be replaced
Adjustment
