Service Manuals, User Guides, Schematic Diagrams or docs for : Sony HiFi Service Bulletin HFP0423

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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

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