Service Guide
SW-HF 5.1 5005
1.2.8 Remote control no use
Problem
Analyze and
identify the
causes
Solutions
Version 1.1 Page 14 of 30
Low power of
the battery
Defective
soldering of
battery spring
SW-HF 5.1
REM PCB
broken, or its
IC or other
components
Defective
conductive
rubber
of
some keys
Check and
replace
Check and
replace
Check and
resolder
defective
one(s)
Repair and
replace
Replace
Defective REM1
，
IC2
，
R18
，
EC3
，
CC4 on
SW-HF5.1 CON PCB
Remote control no use
