KYE Systems Corp. Genius SW-U2.1 200, Service Manual

Page: 11 / 18

Service Guide SW-U2.1 200
Version No. 1.0 Page
11 of 18
1.2.5 Noise and Current Noise
Noise and Current Noise
1. Power failure, filter capacitor
C33 and C27 damaged resulting
in large interference from voltage
ripple provided for IC by power
supply; PCB becoming damp,
dirty or broken.
2. Signal input line connected
improperly/ no signal
1. Long use of potentiometer
resulting in poor connection
of knob shrapnel
2. U1 and U2 defective,
damaged and short circuit
resulting in oversized load
current of power supply to
reduce voltage.
Inspect/ repair/ replace Inspect/ repair/ replace
Poor connection of the
earthing line of signal line,
CON3/ signal line
defective and damaged
Replace/ repair