Sony MXD-D400 Service Manual page 35

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) (Parts No. 4-963-646-01)
• Test Disk (MDW-74/GA-1) (Parts No. 4-229-747-01)
• Laser power meter LPM-8001 (Parts No. J-2501-046-A)
or
MD Laser power meter 8010S (Parts No. J-2501-145-A)*
• Oscilloscope (Measure after performing CAL of prove.)
• Digital voltmeter
• Thermometer
• Jig for checking BD (MD) board waveform
(Parts No. : J-2501-196-A)
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 7.)
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. 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.
Adjustment
5-8. Initial setting of adjustment value
5-9. Recording of Iop information
5-10. Temperature compensation
offset adjustment
5-11. Laser power adjustment
5-12. Iop NV Save
5-13. Traverse adjustment
5-14. Focus bias adjustment
5-17. Auto gain adjustment
5-7-4. AUTO CHECK
1
Optical
IC101 IC12
Pick-up
Parts to be replaced
IC201 IC933
MXD-D400
IC195 D101
35