Service Manuals, User Guides, Schematic Diagrams or docs for : Sony sony tv bulletins sony tv bulletins TVP0277

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                                      TV Products                                                  CSV-1
                                      Service Bulletin
                                      Sony Service Company - Technical Services
                                      A Division of Sony Electronics Inc.
                                      Sony Drive, Park Ridge, New Jersey 07656


Model:      KV-27XBR37, KV-32XBR37                                                No.    277
Subject: Audio Buzz (noise) from speaker                                          Date: January 16, 1996


Symptom:
 (154)             Audio Buzz (noise) from speaker with low audio level



Solution:          Please perform the following circuit change on the M Board.

                   1.    Remove the "M" board from the Main board.
                   2.    Remove the listed reference components from the M board. (See chart below)
                   3.    Add 0 ohm resistor between Pin 1 of IC202 and Pin 3.
                   4.    Add 0 ohm resistor between Pin 5 of IC202 and Pin 7.
                   5.    Reinstall M board and redress wire to original condition.




                        REF                  FORMER
                                DESCRIPTION          PART NUMBER

                        R203      47K OHM,              1-216-089-00
                                    CHIP
                                  RESISTOR
                        R204      47K OHM,              1-216-089-00
                                    CHIP
                                  RESISTOR
                        R207      33K OHM,              1-216-085-00
                                    CHIP
                                  RESISTOR
                        R208      47K OHM,              1-216-089-00
                                    CHIP
                                  RESISTOR
                        R209      33K OHM,              1-216-085-00
                                    CHIP
                                  RESISTOR
                        R210      47K OHM,              1-216-089-00
                                    CHIP
                                  RESISTOR

                                                                                                  cont.


Reference: FPR-                                                                                  PRINTED IN USA
Autoflagged - NO
                                                  PRINTED ON RECYCLED PAPER
TV Products Service Bulletin No. 277



                     REF                 FORMER
                               DESCRIPTION   PART NUMBER
                     C202       220P, CHIP    1-163-001-00
                                CAPACITOR
                     C205       220P, CHIP    1-163-001-00
                                CAPACITOR
                    IC202        IC, LM358    8-759-276-27

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