Power Led (Indicator) No Light; Volume , 3D No Function - KYE Systems Corp. Genius SP-i220 Service Manual

Service Guide
1.2.2

Power LED (indicator) no light

Problem
Analyzer and
Identify the Causes
Solutions

1.2.3 Volume , 3D no function

Problem
Analyzer and
Identify the Causes
Solutions
Power LED (indicator) no light
Power switch or LED
defective
Broken or short circuit
Check solder joints on PCB
Version : 1.0
Defective
D1~D4, R14,
C14, C15, SW1
Re-solder or replace
defective component(s)
Volume , Tone no function
Defective U1, VR, SW2, R8
Check and Replace defective
components
Page 8 of 15
SP-i220
Ac adaptor disconnected
or defective
Check the
ac adaptor