1.2.4 Hum and current noise
Version No.:1.0
Page:10 of 17
Service Manual
SP-U115
Hum and current
noise
Power supply is
poor; filter
capacitor C22 is
damaged to cause
abnormal
interference of
voltage ripple by
power supply IC; PCB
is affected with
damp, polluted or
broken.
Signal earth line
of CON2 is bad
contact.
Inspect/repair/replace
Inspect/repair/replace
Potentiometer is
in use for long
time; spring is
bad contact when
turning knob.
Replace/repair
Содержание Genius SP-U115
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