Version 1.0 Page 10of 19
N1 in SP-HF500A AMP
1.2.5 Noise
Problem
Analyze and
identify the
causes
Solutions
Filter capacitor/ diode dry-soldered
or damaged, pls check c26 c21
C33
,
C8 C9
,
D1
,
D2
,
D3
,
D4 in
SW-S2.1 200
AMP
defective or not
The power supply of each IC
is
normal or not;
Or caused by vibration from
too long lead wire of driver
units
Driver units damaged
Woofer
cabinet
leaks,
closed not well.
Repair
Check and replace
Repair or replace
Noise
SW-S2.1 200