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Paul O'Neill

S rvice Manual for LK2 Series of Pow m sService Manual for LK2 Series of Power Amps

Covering LK2(60), LK275 & LK280

For the purposes of this manual, we will refer to the three types as LK260,

LK275 & LK280. The term LK2 will be used as an “umbrella term”,

covering all three types, i.e. the LK2 series.

CONTENTS

INTRODUCTION .................................................................................................................................... 2

ABOUT THE LK2 SERIES ......................................................................................................................... 2

HOW TO DIFFERENTIATE BETWEEN TYPES OF LK2....................................................................................... 2

ABOUT THIS MANUAL.............................................................................................................................. 3

RETAILER & DISTRIBUTOR OBLIGATIONS ................................................................................................... 3

SPARE PARTS AVAILABILITY AND LK2 REPAIR ............................................................................................ 3

HOW TO USE THIS MANUAL...................................................................................................................... 3

IMPORTANT SAFETY INFORMATION & INSTALLATION ADVICE ......................................................... 4

MAINS CONNECTIONS ............................................................................................................................. 4

LETHAL VOLTAGES................................................................................................................................. 4

PLACEMENT.......................................................................................................................................... 4

PROCEDURE FOR DISMANTLING AND RE-ASSEMBLING THE LK2..................................................... 5

FAULT FINDING ON THE LK2 – HINTS & TIPS...................................................................................... 9

POWER-UP PROBLEMS – FAULT TABLE............................................................................................10

WON’T POWER UP.................................................................................................................................10

WON’T SWITCH OFF...............................................................................................................................10

FUSE BLOWING.....................................................................................................................................11

AMPLIFIER PROBLEMS – FAULT TABLE............................................................................................13

NO OUTPUT .........................................................................................................................................13

TRIP (PROTECTION) PROBLEMS ...............................................................................................................15

DISTORTION / CRACKLING ETC ................................................................................................................16

DC AT OUTPUT.....................................................................................................................................17

Linn LK280 Service Manual

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