Service Guide
SW-HF 5.1 5050
1.2.8 Remote control no use
Problem
Analyze and
identify the
causes
Solutions
Version 1.1 Page 14 of 31
Remote control no use
1. Low power supply
of the battery
2.Defective
soldering of battery
spring
SW-HF 5.1 REM
PCB broken, or its IC
or other components
defective
Defective
conductive rubber
of some keys
Defective REM1
，
IC1,
IC2, R12, EC2, CC3 ,
R2, Q1 or LED1 in
SW-HF5.1 CON PCB
Replace or
repair
Check and
resolder
defective
one(s)
Check and
replace
Check and
replace
