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KYE Systems Corp. Genius SP-U115, Service Manual

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KYE Systems Corp. Genius SP-U115 Service Manual Download Page 10

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

Summary of Contents for Genius SP-U115

Page 1: ...Service Manual SP U115 Service Manual KEY SYSTEM CORP Version No 1 0 Page 1 of 17...

Page 2: ...2011 8 18 Version No 1 0 Page 2 of 17 Service Manual SP U115 Revision Change History Version Date 1 0...

Page 3: ...aker 16 Chapter VI Schematic circuit diagram 17 Version No 1 0 Page 3 of 17 1 2 4 Hum and current noise 10 1 2 5 Power light is off 11 1 2 Errors 6 1 2 1 No power and indicator is off 7 1 2 2 No sound...

Page 4: ...trike the speaker Prevent foreign objects going into the subwoofer via the inverted tube otherwise it may cause electric shock or fire Please strictly follow the rules below when working with the spea...

Page 5: ...d products 1 1 Overview Functional test with error Receive the rejected speaker from customer Replace some parts of the rejected if necessary Figure out practicable maintenance Analyze potential cause...

Page 6: ...2 2 1 2 3 1 2 4 1 2 5 Version No 1 0 Page 6 of 17 Service Manual SP U115 Description 1 2 Errors NO power and indicator is off NO sound Left or right channel error Hum and current noise LED indicator...

Page 7: ...lution 1 2 1 No power and LED indicator is off 1 Welding of power cord is bad 2 The power plug is out of contact 3 CON4 plug becomes loose and copper foil is broken 4 The lines of power are bad 5 Conn...

Page 8: ...PCB short circuit open circuit no electricity 2 The connecting wire is inferior or damaged short circuit open circuit CON1 CON2 CON3 1 J2 J3 D10 Q2 is bad or damaged 2 Potentiometer VR1 is damaged 3 P...

Page 9: ...ft right channel is bad or damaged 3 Signal output line of left right channel is bad or damaged 1 Speaker of left right channel is bad or damaged 2 Signal output line of left right channel is not set...

Page 10: ...ilter 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...

Page 11: ...1 2 5 LED indicator is off Version No 1 0 Page 11 of 17 Service Manual SP U115 LED indicator is off 1 LED1 is damaged or off 2 Copper foil of PCB pin is broken 3 R18 J3 is damaged Replace repair...

Page 12: ...Page 12 of 17 Version No 1 0 2 0 Main sub speaker Chapter II Product specifications Service Manual SP U115...

Page 13: ...Version No 1 0 Page 13 of 17 Service Manual SP U115 Chapter III Flowchart Signal input Volume control Power amplification TEA2025B Sound output Right channel output Left channel output...

Page 14: ...Version No 1 0 Page 14 of 17 Subwoofer Chapter IV Assembly drawing Service Manual SP U115...

Page 15: ...Service Manual SP U115 Version No 1 0 Page 15 of 17 Satellite...

Page 16: ...P024801 00G FRONT CABINET RED AMP024803 00G FRONT CABINET BLUE AMP024804 00G FRONT CABINET WHITE AMP024805 00G AMP024803 00G Ref NO Description Part NO FRONT CABINET BLACK AMP024801 00G 3 IC XPT4871 A...

Page 17: ...Version No 1 0 Page 17 of 17 Service Manual SP U115 Chapter VI Schematic circuit diagram...

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