Service Guide
SW-HF 5.1 5050
1.2.3
Front channel no sound (including either FR or FL no sound )
Problem
Analyze and
identify the
causes
Solutions
Version 1.1 Page 9 of 31
Front channel no sound (including either FR or FL no sound)
PCB damaged,
dry-soldered or
short-circuited;
Defective
connection of front
speaker cables
and jacks, or
defective speaker
cables, jacks or
front driver units
1.defective IC1, IC2 or
components relating to IC1 and
IC2 in SW-HF5.1 INPUT PCB
2.defective IC4
，
IC1 or
components relating to IC4
and IC1 in SW-HF5.1 AMP
PCB
Resolder or
replace
Re-connect or
replace
Check and replace
defective IC or
components
Defective
connection of
front audio
cables, or JACK
disconnected
from PCB or
defective
Re-connect or
replace
