Service Guide
SP-E120
Version : 1.0
Page 8 of 15
1.2.2
Power LED (indicator) no light
Problem
Solutions
1.2.3 Volume no function
Problem
Solutions
Power LED (indicator) no light
Power switch or LED
defective
Defective
D1~D4,R11,C16,C17
Ac cord of transformer
disconnected or defective
Re-solder or replace
defective component(s)
Analyzer and
Identify the Causes
Volume no function
Broken or short circuit
DefectiveU1,VR1
Check solder points on PCB
Analyzer and
Identify the Causes
Check and Replace defective
components
