09TV034
KDL-40Z4500, KDL-46Z4500, KDL-52Z4500 BC
Subject IRIS
Humming Noise from Subwoofer Speaker 1541
SYMPTOM
A humming noise may be audible from the subwoofer speaker and hearable when changing from mute (volume 0)
to volume 1.
CAUSE
Malfunctioning power supply.
SOLUTION
In order to remedy the problem, improve both the BGE and AWF power board as indicated below.
• BGE: add capacitor C1221
Ref. Description Part number
C1221 Cap, Elect 47MF 6,3 V 1-114-399-21
