12TV006R2
REACTIVE 1542 2 BC
Models
KDL-22EX310, 32EX310, 42EX410
Subject: Audio Noise [REVISION 2]
SYMPTOM
At volume level 0~10, very slight noise can be heard from the speakers.
NOTE: The noise disappears when the volume level is high or when pressing the [Mute] button.
CAUSE
Switching noise of DCDC converter affects Audio Amp.
SOLUTION
On the Main Board, change “L57” from ferrite bead to a 22 ohm chip resistor.
Description Part number
Chip resistor, 22 Ohm 1608 1-211-977-11
IMPORTANT: Main boards that are already modified, have the following vendor label:
