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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