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Hi-Fi Products CSA-13
Service Bulletin
Sony Service Company - Technical Services
A Division of Sony Electronics Inc.
Sony Drive, Park Ridge, New Jersey 07656


Model: GEN-MDS No. 423
Subject: Laser Power Measurement Correction Factors. Date: December 27, 1994


Symptom:
(**) Laser power measurements made with the LPM-8001 laser power meter (part
number J-2501-046-A) will actually be somewhat lower than the actual laser power,
and therefore must be corrected to reflect the true power level. The amount of
correction is dependant upon which which laser mode is being measured at the time.



Solution: CD Read Power and MO Read Power:
Multiply the power specification shown in the service manual by 0.94, and
then adjust the laser power so that the re-calculated power level is read on
the power meter.

MO Write Power:
Multiply the power specification shown in the service manual by 0.92, and
then adjust the laser power so that the re-calculated power level is read on
the power meter.



EXAMPLE: MO write power spec. shown in manual = 6.8 mW

6.8 mW x 0.92 = 6.26 mW

Adjust MO write power so that 6.26 mW is read in the laser power
meter.




Reference: Technical News GA-94037 PRINTED IN USA
Autoflagged - YES
PRINTED ON RECYCLED PAPER
Audio Products Service Bulletin No. xxx