Linn LK1 Service Manual
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Linn LK1 Service Manual

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Table of Contents

See also: Owner's Manual
th
20
August 1999
LK1 PreAmplifier Service Manual
LK1
CONTENTS
INTRODUCTION ....................................................................................................................................
A
..............................................................................................................................
BOUT THIS MANUAL
R
& D
ETAILER
ISTRIBUTOR
S
P
A
PARE
ARTS
VAILABILITY AND
H
OW TO USE THIS MANUAL
INSTALLATION .....................................................................................................................................
I
S
I
MPORTANT
AFETY
NFORMATION
I
I
NSTALLATION
NSTRUCTIONS
P
..........................................................................................................................................
LACEMENT
POWER-UP PROBLEMS........................................................................................................................
P
OWER UP PROBLEMS
F
......................................................................................................................................
USE BLOWING
DISPLAY & CONTROL PROBLEMS.......................................................................................................
G
D
& C
ENERAL
ISPLAY
R
C
P
EMOTE
ONTROL
ROBLEMS
C
F
P
ONTROL VIA
RONT
AMPLIFIER PROBLEMS
A
(L
)
UDIO
ISTEN
OUTPUT
T
(
) O
APE
RECORD
UTPUT
Page1
LK1 Service Manual
PreAmplifier Service Manual
O
...................................................................................................
BLIGATIONS
LK1
............................................................................................
REPAIR
......................................................................................................................
............................................................................................................
...................................................................................................................
............................................................................................................................
................................................................................................
ONTROL PROBLEMS
................................................................................................................
...................................................................................................................10
ANEL
.......................................................................................................................11
........................................................................................................................11
.......................................................................................................................13
Copyright © 1999 Linn Products Limited. All rights reserved.
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Summary of Contents for Linn LK1

  • Page 1 DISPLAY & CONTROL PROBLEMS....................... & C ....................ENERAL ISPLAY ONTROL PROBLEMS ........................ EMOTE ONTROL ROBLEMS ........................10 ONTROL VIA RONT ANEL AMPLIFIER PROBLEMS ........................11 ........................11 UDIO ISTEN OUTPUT ........................13 RECORD UTPUT Page1 Copyright © 1999 Linn Products Limited. All rights reserved.

  • Page 2: About This Manual

    About this manual This manual is designed to help you as a Linn Retailer or Distributor to repair as many LK1 faults at your repair centre as is practical and so provide the best possible service for your customer should a problem arise.

  • Page 3: Important Safety Information

    LK1 control functions. Although the LK1 can usually be stacked along with other products with no problem, it is better if possible to keep it apart from other products to prevent its operation being adversely affected by the heat and strong electrical field emitted by some products.
  • Page 4 Always handle the LK1 with great care. Always turn off the LK1 and any Power Amps connected to it before connecting or disconnecting any plugs to/from the sockets at the back of the unit. Wait at least 10 seconds after switching off the power amps before unplugging from the back of the LK1 to avoid damage to the speakers.

  • Page 5: Power-Up Problems

    +15V - U10 (regulator) output – middle leg. -15V - Q78 emitter (square pad) +Vref - U9 pin 7 -Vref - U9 pin 8 +8V - Q77 emitter (square pad) Page5 Copyright © 1999 Linn Products Limited. All rights reserved. Contents...

  • Page 6: Fuse Blowing

    Fault inside LK1, e.g. short See Introduction to Fault circuit or similar. Finding section (accessible via Linfo Website - Product Information) for tips on tracing the fault. Also see circuit diagrams. Page6 Copyright © 1999 Linn Products Limited. All rights reserved. Contents...
  • Page 7 ‘Christmas tree Sometimes lights’) intermittent – may LK1 will not start doing this function. occasionally and then become more & more frequent. Symptoms may vary. Page7 Copyright © 1999 Linn Products Limited. All rights reserved. Contents...
  • Page 8 One or more LK1 works okay Faulty display LED Replace LED – Linn part nos: display LEDs dim otherwise. MISS 004 (green LED) or dead MISS 005 (red LED) Page8 Copyright © 1999 Linn Products Limited. All rights reserved. Contents...

  • Page 9: Remote Control Problems

    Remote faults have U6 (main processor IC) on or U6 (Linn part no: IC 017) handset. been ruled out Control board faulty. Works okay via May be intermittent front panel controls Page9 Copyright © 1999 Linn Products Limited. All rights reserved. Contents...
  • Page 10 Some buttons May be intermittent Control board requires See Control Board Upgrade work and some upgrade procedure (accessible via Linfo buttons do not Website - Product Information) Page10 Copyright © 1999 Linn Products Limited. All rights reserved. Contents...

  • Page 11: Amplifier Problems

    Amplifier problems It is assumed at this point that the LK1 is definitely the cause of the fault – that you have traced the fault to the LK1 and ruled out all other aspects of the system (e.g. interconnect leads, power amp, speakers, sources etc.).
  • Page 12 Symptoms may phono socket and main or replace wire as necessary. dead or distorted. vary board inside the LK1 is Some crackling broken or not making good may occur contact Page12 Copyright © 1999 Linn Products Limited. All rights reserved. Contents...
  • Page 13 U5 – AUX from TUN while a U6 – TUN source is playing on AUX, one channel of the CD may be heard on the tape. Page13 Copyright © 1999 Linn Products Limited. All rights reserved. Contents...

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