Noise - Genius SW-2.1 355 Service Manual

Service Guide
1.2.6.

Noise

Problem
1. D1-D4
or defective
Analyze and
2. U1,
identify the
components
causes
dry-soldered or defective
3. PCB broken or dry-soldered
Solutions
Repair
，
C29 dry-soldered
Vibration from too
long lead wire of
U2, U3 or the
driver units
around
Check and replace
Version 1.0
Noise
Page 12 of 20
SW-2.1 355
Driver units
damaged
Repair or replace