Service 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 R ETAILER & D ISTRIBUTOR OBLIGATIONS.... 3 SPARE PARTS AVAILABILITY AND LK2 REPAIR.... 3 HOW TO USE THIS MANUAL..... 3 IMPORTANT SAFETY INFORMATION & INSTALLATION ADVICE.. 4 MAINS CONNECTIONS..... 4 L ETHAL 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 W ONT POWER UP....10 W ONT SWITCH OFF....10 FUSE BLOWING.....11 AMPLIFIER PROBLEMS FAULT TABLE....13 NO OUTPUT.....13 TRIP ( PROTECTION ) PROBLEMS....15 D ISTORTION / CRACKLING ETC....16 DC AT OUTPUT.....17
Copyright 2000 Linn Products Limited. All rights reserved. Paul O'Neill

LK2 Service Manual

Introduction

About the LK2 Series

There were three versions of the LK2: The first version was known at the time simply as the LK2. It gave an output of 60 watts per channel (into 8 ohm load) and used PCAS 003 type boards. For the purposes of this manual, we will refer to this version as the LK260. The second type was also usually known as the LK2 but was often called the LK275 to differentiate it from the 60-watt version, as it gave 75 watts per channel. Also used PCAS 003 type boards but with several improvements over the 60 watt version the most obvious being the increased power output, but also had improved protection circuitry and better sound. The third and last type was known universally as the LK280. 80 watts per channel used PCAS 020 boards. PCAS 020s, at first glance are similar to PCAS 003s, in that they are roughly the same size, shape and layout, but they are a completely different design of board (i.e. not just a modified version of PCAS 003) as a closer examination shows. The LK280 sounded considerably better than either of its predecessors.
How to differentiate between types of LK2
There are several methods of determining the specification of an LK2: Looking at the serial number of a unit and using the LK2 Product History (accessible via Linfo website Product Information) will tell you which revision it was sold as. Since, however upgrade kits were sold by Linn in large quantities to allow customers to convert their early version LK2 into the latest spec, many units are not what they seem. The following information will help you to determine the specification of a unit if its exact history is unknown. LK280s had LK280 printed on the facia earlier units (LK2 & LK275) had LK2 printed there, but beware an earlier version may have been upgraded to LK280 spec. LK260s and LK275s had a red power LED and LK280s had a green LED. This is handy as a quick and easy indicator but is not 100% reliable (LEDs are easily changed) The best way to determine a units spec is simply to remove the sleeve and look at the boards that are fitted (see below). Distinguishing Features of Different Board Types PCAS 003 used in LK260/LK275
These diodes and capacitors not fitted to 60 watt boards 60 watt type used same board but with some differences, as shown below Capacitor & resistor (bridged) not fitted to 60 watt board

PCAS 020 used in LK280

Small heatsink bar with transistors fitted to it found on PCAS 020 only Small Hybrid board fitted here at 90 degrees to main board found on PCAS 020 only

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About this manual
This manual deals effectively with three quite distinct amplifiers. The amps have enough in common to justify this approach and this avoids the confusion that might come with separate manuals. Any differences between the types will be dealt with in the Circumstances column e.g. Applies to LK280 only. This manual is designed to help you, as a Linn Retailer or Distributor, to repair as many LK2 faults at your repair centre as is practical and so provide the best possible service for your customer should a problem arise. If you have any suggestions or comments regarding this manual, please contact Paul ONeill at Linn Products Ltd: By E-mail PAULO@LINN.CO.UK By Phone ++44 (0) 5005 By Fax ++44 (0) 4262 Marked for attention of Paul ONeill

Retailer & Distributor Obligations
Linn Specialist Retailers or Distributors are obliged to carry out the repairs in this manual under the terms of the contract & warranty agreements. You should return a faulty product to Linn for repair, only if the fault is not covered in this Service Manual. If a product, which is under warranty, is returned to Linn for repair and the fault is covered in the service manual, Linn may levy a charge and this charge should not be passed to the customer.
Spare Parts Availability and LK2 repair
Please note that the LK2 has been discontinued for some considerable time now and as such, we cannot guarantee the supply of spare parts many are simply no longer available and some others are no longer in stock. Some part numbers are listed throughout this manual, but these are provided for information only and this does not imply that these parts will be available should you request them. Linn guarantee that we will support a product until 5 years after the final build. We take this obligation very seriously and also go much further. Beyond this date, we will repair any Linn product that we possibly can, where it is within our power to do so. However, due to the difficulty with the availability of spare parts, as explained above, it is occasionally not possible to repair a product or supply parts for repair, if the necessary parts are not available.

How to use this manual

The main body of this manual, the fault table, is designed to be as quick and simple as possible to use when you are confronted with a faulty product and so it is arranged by fault symptom as the symptom is usually all that you will know about the fault. Also read the LK2 fault finding Hints & Tips section below as the information contained there may save you a lot of time. If you are unsure about the meaning of any words or phrases, look in the Glossary. (accessible via Linfo Website - Product Information) Before embarking on any Service work, you should read the Service Procedures section (accessible via Linfo Website - Product Information), as there are certain procedures that must be followed in order to ensure the problem is resolved quickly and permanently Table of contents & fault symptoms Look firstly at the table of contents and find the category that covers the symptom you are seeing, then look down the list of faults in that section until you find the symptom or symptoms that best describe the problem. Circumstances Then simply follow the table along the table specifies circumstances surrounding the fault symptom e.g. whether the fault is likely to be intermittent or constant, if the fault only occurs within a range of serial numbers etc. Possible causes The next column details possible causes this is effectively the most important section, probably the main reason you are looking at this manual at all. There may be several possible causes for the symptom you have it is worth checking out all of these (and bear in mind that there may be more than one fault). For Page3 Contents

Page9 Contents

Power-up problems Fault Table

Wont power up

Symptom Wont power up. Power LED dead & no function both channels Circumstances Constant Possible Cause(s) Fuse blown in unit and/or in mains plug. Cure Replace fuse(s) with correct value & type. Fuse in mains lead should be 5A. Fuse in LK2 should be Slow Blow look for a T before the rating on the fuse. Correct types are: 100-115V - T3.15A antisurge 220-240V - T6.3A antisurge Replace faulty mains lead.
Wont power up. Power LED dead & no function both channels Wont power up. Power LED dead & no function both channels Unit dies intermittently & stops working for a while possible distortion or reduction in sound quality both channels Doesnt power up or Powers up (display LED lit) but no function. or Possible distortion / poor sound quality both channels

May be intermittent

Mains lead faulty

Power switch faulty

Replace power switch use Linn part no: SWRL 006

At any time

Mains voltage dropping too low for LK2 to function correctly (known as Brown outs as these voltage drops also sometimes cause the house lights to dim.)
Consult an electrician or your electricity supply company.
Wrong mains voltage for LK2 type mains voltage is too low. (e.g. 240V unit being used with 115V mains supply.)

One channel dead

One channel dead One channel dead
May be intermittent May be intermittent
Transformer cable not connected to board; may be broken or may have a bad connection Channel has tripped Board is faulty
Check voltage rating on underside of LK2. If wrong, transformer will require replacement. Correct part numbers are: MCAS 001/100 for 100V mains MCAS 001/115 for 115V mains MCAS 001/220 for 220V mains MCAS 001/240 for 240V mains Our stock of these transformers is very limited, so it may not be possible to supply the part you require. Reconnect cable or repair if broken.
See Trip Faults section below See Amplifier Faults section below

Wont switch off

Amp will not switch off using power switch Page10 Contents May be intermittent Faulty power switch Replace power switch use Linn part no: SWRL 006

Fuse blowing

Symptom Fuse blowing Circumstances May be intermittent Possible Cause(s) Wrong type of fuse fitted Cure Replace fuse(s) with correct value & type. Fuse in mains lead should be 5A. Fuse in LK2 should be Slow Blow look for a T before the rating on the fuse. Correct types are: 100-115V - T3.15A antisurge 220-240V - T6.3A antisurge Consult an electrician or your electricity supply company. Check voltage rating on underside of LK2. If wrong, transformer will require replacement. Correct part numbers are: MCAS 001/100 for 100V mains MCAS 001/115 for 115V mains MCAS 001/220 for 220V mains MCAS 001/240 for 240V mains Our stock of these transformers is very limited, so it may not be possible to supply the part you require. Replace transformer. Correct part numbers are: MCAS 002/100 for 100V mains MCAS 002/115 for 115V mains MCAS 002/220 for 220V mains MCAS 002/240 for 240V mains Our stock of these transformers is very limited, so it may not be possible to supply the part you require. Replace faulty bridge rectifier diode(s) Part details: MR752 6A 200V Rectifier diode (Linn Part no: MISS 010)

Power transistor (the large transistors clamped to the heatsink) faulty. It is sometimes possible to measure these transistors using an ohmmeter to check if faulty (usually internal short-circuit across one or more of the junctions), but also there is the possibility that the transistor measures okay but is indeed faulty. It will sometimes be necessary to change them to confirm or rule out this fault. Power transistor (the large transistors clamped to the heatsink) faulty. It is sometimes possible to measure these transistors using an ohmmeter to check if faulty (usually internal short-circuit across one or more of the junctions), but also there is the possibility that the transistor measures okay but is indeed faulty. It will sometimes be necessary to change them to confirm or rule out this fault.
Check / replace power transistor(s). Part details Q23 & Q30 2SA1386; PNP; 160V; 15A; MT100 (Linn part no: TRAN 017) Q24 & Q34 2SC3519; NPN; 160V; 15A; MT100 (Linn part no: TRAN 018)
Check / replace power transistor(s). Part details Q20 & Q27 2SA1386; PNP; 160V; 15A; TO218 (Linn part no: TRAN 017) Q24 & Q31 2SC3519; NPN; 160V; 15A; MT100 (Linn part no: TRAN 018)

Page13 Contents

Applies only to earlier versions of LK260 Probably constant
Power transistor (the large transistors clamped to the heatsink) faulty. It is sometimes possible to measure these transistors using an ohmmeter to check if faulty (usually internal short-circuit across one or more of the junctions), but also there is the possibility that the transistor measures okay but is indeed faulty. It will sometimes be necessary to change them to confirm or rule out this fault. Regulator U1 or U2 faulty
Check / replace power transistor(s). Parts may be as listed in the box above or they may be as listed below, depending on whether it is an earlier or later version of LK260. Part details Q20 & Q27 TIP36C; PNP; 100V; 25A; TO218 (Linn part no: TRAN 005) Q24 & Q31 TIP35C; NPN; 160V; 15A; TO218 (Linn part no: TRAN 004) Replace faulty regulator part details: U1 LM317T Voltage regulator (Linn part no: IC 005) U2 LM337T Voltage regulator (Linn part no: IC 006) Replace U3 Linn part number IC 030 (not available elsewhere). Take great care when removing U3 from the board as it is very easy to rip tracks. The pins in the middle are especially difficult to de-solder use heat & patience not force. It is also worth checking / replacing regulators U1 & U2 (part details above) and the big resistors at either side R37 & R46 part details: 0.1ohm; 10%; 2.5W; 100V. (Linn part no: RES 050). See Fault Finding on the LK2 hints & tips section at the beginning of this manual.

Tripping

Regulator U1 or U2 faulty

Page15 Contents

Power transistor (the large transistors clamped to the heatsink) faulty. It is sometimes possible to measure these transistors using an ohmmeter to check if faulty (usually internal short-circuit across one or more of the junctions), but also there is the possibility that the transistor measures okay but is indeed faulty. It will sometimes be necessary to change them to confirm or rule out this fault. Power transistor (the large transistors clamped to the heatsink) faulty. It is sometimes possible to measure these transistors using an ohmmeter to check if faulty (usually internal short-circuit across one or more of the junctions), but also there is the possibility that the transistor measures okay but is indeed faulty. It will sometimes be necessary to change them to confirm or rule out this fault. Power transistor (the large transistors clamped to the heatsink) faulty. It is sometimes possible to measure these transistors using an ohmmeter to check if faulty (usually internal short-circuit across one or more of the junctions), but also there is the possibility that the transistor measures okay but is indeed faulty. It will sometimes be necessary to change them to confirm or rule out this fault. Faulty component in circuit.
Check / replace power transistor(s). Parts may be as listed in the box above or they may be as listed below, depending on whether it is an earlier or later version of LK260. Part details Q20 & Q27 TIP36C; PNP; 100V; 25A; TO218 (Linn part no: TRAN 005) Q24 & Q31 TIP35C; NPN; 160V; 15A; TO218 (Linn part no: TRAN 004) See Fault Finding on the LK2 hints & tips section at the beginning of this manual.
Distortion / crackling etc
Symptom Output distorted may one or both channels Circumstances May be intermittent Possible Cause(s) Power-up problem if amp receives insufficient power it will struggle to amplify the signal and distortion will occur Cure See Power-up problems section above.

Page16 Contents

Output very badly distorted
Applies only to LK260 & LK275 Probably constant May be intermittent
One of the Reliability Modification components has failed Faulty component in circuit.

Distorted output

Crackling noise from output
Probably intermittent may be temperature dependent
Transistor in circuit faulty junction is breaking down
Carry out LK2 Reliability Modifications procedure can be accessed via Linfo Product Information. See Fault Finding on the LK2 hints & tips section at the beginning of this manual. See Introduction to Fault Finding (accessible via Linfo Product Information) Or See Fault Finding on the LK2 hints & tips section at the beginning of this manual.

Paul ONeill Copyright 2000 Linn Products Limited. All rights reserved.
LK2 Reliability Modifications

Fault Symptoms

There are several different symptoms, depending on what component has failed (symptoms usually affect one channel only): No output at all Bad distortion at output DC at output

Units affected

Potentially all LK260s or LK275s (those not upgraded to LK280)

Equipment Required

(Those items marked
may not definitely be required)
Workbench clear of debris and clutter No2 Posidriv (Supadriv) Screwdriver ~ No1 Posidriv (Supadriv) Screwdriver ~ 2.5mm Hex key or Allen Key ~ Medium sized flat-blade screwdriver 7mm spanner or nut-runner 5.5mm spanner or nut-runner Soldering Iron, temperature controlled 25 watt with fine tip Solder Sucker Fine solder Paper handkerchiefs or paper towels Heatsink compound (a white grease-like substance that improves heat conduction) Fine Pliers Soft cloth

Parts Required

20Kohm, 2.5Watt resistor 2.4Kohm, 2.5Watt resistor 220pF 160V Polystyrene capacitor 68pF 160V Polystyrene capacitor Qty Qty Qty Qty 2 (per unit) 2 (per unit) 2 (per unit) 2 (per unit)
Note if you cannot find the above parts available in your local area, some alternatives are available in the case of the resistor wattage values: It is possible to use a higher wattage resistor in each case, although it tends to be the case that the higher the wattage, the larger the resistor and it may not be able to physically fit in the space available or may touch against another device or component, especially in the case of R33 (not a good idea). It is possible to use a slightly lower wattage resistor in each case, however if too low. this will shorten the life of the resistor and the fault may re-occur. A minimum of 1 watt is recommended.

Paul ONeill

Copyright 2000 Linn Products Limited. All rights reserved.

Procedure

Step 1. Remove the boards from the LK2 Remember to keep all the screws and other parts that you remove from the LK2 in a safe place. 1. 2. Disconnect LK2 from everything and especially the mains (or Spark). Place a soft cloth on the workbench & lie the LK2 upside down on the cloth. Using a No2 posidriv screwdriver, remove the 4 screws that hold the sleeve on to the LK2. Stand the LK2 on its facia and slide the sleeve up and off and carefully set it aside in a safe place where it will not get scratched or damaged. Remove the 4 allen bolts or screws (older units used screws) holding the speaker sockets on to the back panel. Do this to both channels. Disconnect both transformer connectors (the cables going from transformer to board) from the board Lift the LK2 up so that it is standing on one of the heatsinks. Each channel is held into the tray by 2 countersunk screws that attach to the heatsink on the underside. Hold the channel that is now uppermost (to prevent it from falling once it has been freed) and remove the two screws from this channel only. Lie the LK2 down (correct way up) and remove the channel that you have just loosened this can sometimes be tricky so follow these instructions: Pull the board slightly toward the front of the unit until the 3-pin cannon input socket at the rear is clear of the back panel it may sometimes be necessary to push the back panel slightly in the opposite direction until the socket is completely clear. Lift the end of the board containing the 3-pin cannon socket upwards (see picture) until that end of the board is clear of the tray. Some delicate manoeuvring may be necessary, but dont force it.

3. 4. 5.

Step 2. Remove the heatsinks from the boards 1. Using the 5.5mm spanner or nut-runner, loosen the single nut/bolt found beside the 3-pin cannon socket (see picture below) do not remove the nut completely, but loosen it to the point where only a very small amount of the bolt is protruding from one side of the nut. The board is now held on to the heatsink by 4 allen screws or 4 nuts/bolts (see picture below). If nuts/bolts are fitted, loosen them but do not remove them (as with single bolt above), pull the board upwards until there is a gap between the board and the heatsink and then slide the board to one side. If the board will not move easily, check that you have loosened all 5 nuts/bolts. If all are loosened correctly and it is still not free, the board may be held on by the heatsink compound and will require some slight pressure to free it. If the board is held on by allen screws, completely remove all 4 screws, lift the board away from the heatsink and slide the single bolt beside the cannon socket sideways to free the board.
Step 3. Carry out the modification 1. Locate the components as listed in the table below and replace with the values shown (see pictures below for location of these components). Do this for both channels. Please note R49 depending on what size of part you have purchased, it may be too big for the space available. If so, the part can be inserted to stand up as shown below. R49 resistor leg bent into this shape R49 resistor body standing at 90 degrees to board

Circuit board

Please note R33 is located underneath one of the big capacitors C16 (see picture below). The capacitor holder must be removed from the board to access the resistor. Turn the board upside down and you will see that the capacitor holder is held by two nuts/bolts. Remove the two nuts and the capacitor will come away from the board but be careful, as it will still be held by a pair of wires. If the nuts/bolts keep spinning instead of coming loose, insert a medium sized flat-blade screwdriver under the capacitor and press it against the head of the bolt while turning the nut this usually provides enough grip to hold the bolt so that the nut comes free. Component R33 R49 C6 C19 Replace with: 20Kohm, 2.5Watt resistor 2.4Kohm, 2.5Watt resistor 68pF 160V Polystyrene capacitor 220pF 160V Polystyrene capacitor
R33 is found underneath this capacitor C6 Q10
In order to prevent the two polystyrene capacitors that you have just replaced from failing at a later date, make the following small adjustments to the position of some components: Bend Q10 away from C6 (towards the middle of the board). As shown in picture above Bend C6 away from Q10 (towards the 3-pin cannon socket). As shown in picture above Bend C19 away from Q10 towards R49 but do not bend it too close to R49 position it so that it is about half way between Q10 and R49. As shown in picture above These steps are advised because Q10 and R49 get quite hot and can sometimes melt the polystyrene capacitors (over a period of many years). Positioning the components as above minimises the effect of this heat and prolongs the life of the capacitors.

Step 4. Re-assemble the LK2
Re-attach the capacitor C16 that you removed to access R33. Use a medium sized flat-bladed screwdriver to hold the head of the bolt while you screw the nut back into place. Ensure nuts are tight as, if they come loose later, they may short out the circuitry while the unit is powered up and cause major damage. 2. Re-attach the heatsink: Apply heatsink compound in a single line along the centre of the coupling block as shown below Heatsink compound here

If heatsink

was attached with allen screws: Slide the single nut/bolt (still attached to board) into the middle of its slot do not tighten Rest the board on the heatsink in a central position. Line up the screw holes in the board with those in the heatsink and screw in all four screws but do not tighten fully. Line up the board and heatsink so that they are parallel and level with each other (as diagrams above) and then tighten the screws fully. Tighten the nut/bolt
Refit boards into tray just do the reverse of the dismantling process described at the start of this document. Refit sleeve Test amp fully
Linn Parts List (Bill of Materials) for PCAS 003 Amplifier Board for LK2 (60) & LK275 Power Amps
Please note that this list is provided for guidance only. Linn Products cannot guarantee the accuracy of the information contained in the list and will not be held responsible for any errors that occur as a result of its use. Please double check that the details listed match the component that you are replacing.
How to follow a Bill of Materials (BOM)
The BOM may, at first glance seem quite confusing. Once a few things are explained however, you should have no problems following it. The main part of this document, i.e. the table, is split into nine columns as shown in the example below:
Quantity -------1.00000 Units ----ONES T C.Des - ----R C001 Part Number ----------CAP 003 Description Type Kit Cost -------------- --- ---22UF,+50%,-20%,50V,ELTR,TH,PCO100, C Y Y ,,,,,,NCC,,RUBYCON,,MULLARD
Ignore all columns except for the middle three these contain all the information you require as explained below:

1.00000 1.00000

ONES ONES

R C004 R C005

CAP 003 CAP 099

N N N N

Y Y Y Y
** Warning - Part OBSOLETE on 27-APR-1989 1.00000 ONES R C006 CAP 039 1.00000 ONES R C007 NO INFO NO LINN PART NUMBER EXISTS FOR THIS PART 1.00000 ONES R C008 NO INFO NO LINN PART NUMBER EXISTS FOR THIS PART 1.00000 1.00000 ONES ONES R C009 R C010 CAP 068 CAP 020
** Warning - Part OBSOLETE on 29-OCT-1999 1.00000 ONES R C011 CAP 020 ** Warning - Part OBSOLETE on 29-OCT-1999 1.00000 ONES R C012 CAP 003 1.00000 1.00000 1.00000 ONES ONES ONES R C013 R C014 R C015 CAP 003 CAP 022 CAP 022
22UF,+50%,-20%,50V,ELTR,TH,PCO100, C ,,,,,,NCC,,RUBYCON,,MULLARD 22UF,+50%,-20%,50V,ELTR,TH,PCO100, C ,,,,,,NCC,,RUBYCON,,MULLARD 6U8F,+10%,-10%,63V,ELTR,TH,PCO100, C ,,,,,,,,,, 6U8F,+10%,-10%,63V,ELTR,TH,PCO100, C ,,,,,,,,,, 10000UF,+20%,-20%,64V,ELTR,TH, PCO400,,,,,,,BHC,,,, 10000UF,+20%,-20%,64V,ELTR,TH, PCO400,,,,,,,BHC,,,, C C

1.00000 1.00000 1.00000

ONES ONES ONES

R C016 R C017 R C018

CAP 085 CAP 085 CAP 037
470PF,+2%,-2%,160V,PST,TH,CO900,,, C ,,,,,,,, 220PF,+2%,-2%,160V,PST,TH,CO100,,, C ,,,,,,,,
** Warning - Part OBSOLETE on 28-MAR-1990 1.00000 ONES R C019 CAP 038

15-AUG-00 Page 2

Quantity -------1.00000 1.00000

Units ----ONES ONES

T C.Des - ----R C020 R C021
Part Number ----------CAP 033 CAP 250
Description Type Kit Cost -------------- --- ---22UF,+20%,-20%,10V,TANT,TH,PCO200, C N Y ,,,,,,STC TAG,,THOMSON,, 330NF,+5%,-5%,250V,PPR,TH,CO900,,, C ,,,,EVOX,,ARCOTRONIC,, 100UF,+20%,-20%,63V,ELTR,TH, PCO200,,,,,,,ECC,,RUBYCON,, 100UF,+20%,-20%,63V,ELTR,TH, PCO200,,,,,,,ECC,,RUBYCON,, 4.7V ZENER OBSOLETE PART TYPE 1N4148 TYPE 1N4148 TYPE 1N4148 FUNCTION DIODE FUNCTION DIODE FUNCTION DIODE CASE C C C C N Y

1.00000

R C022

CAP 020

** Warning - Part OBSOLETE on 29-OCT-1999 1.00000 ONES R C023 CAP 020 ** Warning - Part OBSOLETE on 29-OCT-1999 1.00000 ONES R D001 MISS 009 ** Warning - Part OBSOLETE on 29-MAR-1990 1.00000 ONES R D002 MISS 001

R D003 R D004 R D005

MISS 001 MISS 001 MISS 009

CASE CASE

4.7V ZENER OBSOLETE PART TYPE 1N4148 TYPE 1N4148 FUNCTION DIODE FUNCTION DIODE CASE
** Warning - Part OBSOLETE on 29-MAR-1990 1.00000 ONES R D006 MISS 001
1.00000 1.00000 1.00000 1.00000

ONES ONES ONES ONES

R D007 R D008 R D009 R D010
MISS 001 MISS 010 MISS 010 MISS 010
CASE GENERAL INFO RECTIFIER GENERAL INFO RECTIFIER GENERAL INFO RECTIFIER GENERAL INFO RECTIFIER GENERAL INFO RECTIFIER GENERAL INFO RECTIFIER

C C C C

TYPE FUNCTION MR752 6A 200V TYPE FUNCTION MR752 6A 200V TYPE FUNCTION MR752 6A 200V TYPE FUNCTION MR752 6A 200V TYPE FUNCTION MR752 6A 200V TYPE FUNCTION MR752 6A 200V

R D011 R D012 R D013

MISS 010 MISS 010 MISS 010

15-AUG-00 Page 3

POWER AMPLIFIER PCB ASSEMBLY *OBSOLETE PART* Units: ONES BOM Type: C Type Kit Cost ---- --- ---C N Y C N Y
T C.Des - ----R D014 R D015
Part Number ----------MISS 001 MISS 001
Description ----------TYPE FUNCTION 1N4148 DIODE TYPE 1N4148 FUNCTION DIODE

R D016

MISS 014
POWER AMP MAINS INDICATOR LED. ZTX653,NPN,100V,2A,ELINE,653, ZETEX, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, BD140,PNP,80V,1.5A,TO126,140, MOTOR, BD140,PNP,80V,1.5A,TO126,140, MOTOR, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, BD139,NPN,80V,1.5A,TO126,139, MOTOR,
** Warning - Part OBSOLETE on 07-SEP-1992 1.00000 ONES R Q001 TRAN 001 1.00000 1.00000 ONES ONES R Q002 R Q003 TRAN 001 TRAN 002
R Q004 R Q005 R Q006 R Q007
TRAN 002 TRAN 001 TRAN 001 TRAN 002

R Q008 R Q009 R Q010

TRAN 002 TRAN 002 TRAN 007
** Warning - Part OBSOLETE on 30-OCT-1996 1.00000 ONES R Q011 TRAN 007 ** Warning - Part OBSOLETE on 30-OCT-1996 1.00000 ONES R Q012 TRAN 001 1.00000 1.00000 ONES ONES R Q013 R Q014 TRAN 001 TRAN 006
** Warning - Part OBSOLETE on 30-OCT-1996

15-AUG-00 Page 4

T C.Des - ----R Q015 R Q016
Part Number ----------TRAN 002 TRAN 001
Description ----------ZTX753,PNP,100V,2A,ELINE,753, ZETEX, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, 2SA1386,PNP,160V,15A,MT100,1386, SANKEN, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, 2SC3519,NPN,160V,15A,MT100,3519, SANKEN, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, 2SA1386,PNP,160V,15A,MT100,1386, SANKEN, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, ZTX753,PNP,100V,2A,ELINE,753, ZETEX, TYPE MPS A93 POLARITY PNP OBSOLETE
R Q017 R Q018 R Q019 R Q020
TRAN 001 TRAN 002 TRAN 001 TRAN 017
R Q021 R Q022 R Q023 R Q024
TRAN 002 TRAN 002 TRAN 002 TRAN 018
R Q025 R Q026 R Q027 R Q028
TRAN 001 TRAN 001 TRAN 017 TRAN 002

R Q029 R Q030

TRAN 002 TRAN 010
** Warning - Part OBSOLETE on 13-MAR-1990 1.00000 ONES R Q031 TRAN 018
2SC3519,NPN,160V,15A,MT100,3519, SANKEN,

15-AUG-00 Page 5

T C.Des - ----R Q032 R Q033
Part Number ----------TRAN 001 TRAN 001
Description ----------ZTX653,NPN,100V,2A,ELINE,653, ZETEX, ZTX653,NPN,100V,2A,ELINE,653, ZETEX, TYPE MPS A43 POLARITY NPN OBSOLETE

R Q034

TRAN 009
** Warning - Part OBSOLETE on 13-MAR-1990 1.00000 ONES R R001 RES 029 1.00000 1.00000 ONES ONES R R002 R R003 RES 017 RES 021
1K,1%,MF,1/4W,0.25W,200V,50ppm,,,
4K7,1%,MF,1/4W,0.25W,200V,50ppm,,, C 100R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 4K3,1%,MF,1/4W,0.25W,200V,50ppm,,, C 4K7,1%,MF,1/4W,0.25W,200V,50ppm,,, C 120R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 120R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 120R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 220R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 220R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 4K3,1%,MF,1/4W,0.25W,200V,50ppm,,, C
R R004 R R005 R R006 R R007
RES 078 RES 017 RES 030 RES 030
R R008 R R009 R R010 R R011
RES 030 RES 001 RES 001 RES 078

R R012 R R013 R R014

RES 022 RES 022 RES 023
820R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 820R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 910R,1%,MF,1/4W,0.25W,200V,50ppm,, C ,

15-AUG-00 Page 6

T C.Des - ----R R015 R R016
Part Number ----------RES 041 RES 023
Description Type Kit Cost -------------- --- ---5K6,1%,MF,1/4W,0.25W,200V,50ppm,,, C N Y 910R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 5K6,1%,MF,1/4W,0.25W,200V,50ppm,,, C 620R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 620R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 180R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 1K1,1%,MF,1/4W,0.25W,200V,50ppm,,, C 1K1,1%,MF,1/4W,0.25W,200V,50ppm,,, C 180R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 4R7,1%,MF,1/4W,0.25W,200V,50ppm,,, C N Y
R R017 R R018 R R019 R R020
RES 041 RES 042 RES 042 RES 043
R R021 R R022 R R023 R R024
RES 035 RES 035 RES 043 RES 082
R R025 R R026 R R027 R R028
RES 133 RES 133 RES 048 RES 025
4R7,5%,WWC,XX,4W,999V,999ppm,,, 4R7,5%,WWC,XX,4W,999V,999ppm,,,
12R,1%,MF,1/4W,0.25W,200V,50ppm,,, C 22K,1%,MF,1/4W,0.25W,200V,50ppm,,, C

R R029 R R030 R R031

RES 047 RES 009 RES 002
0R47,10%,WWE,W21,2.5W,100V,75ppm,, C , 27R,1%,MF,1/4W,0.25W,200V,50ppm,,, C 150R,1%,MF,1/4W,0.25W,200V,50ppm,, C ,

15-AUG-00 Page 7

T C.Des - ----R R032
Part Number ----------RES 017
Description Type Kit Cost -------------- --- ---4K7,1%,MF,1/4W,0.25W,200V,50ppm,,, C N Y
1.00000 ONES R R033 NO INFO 20K,1%,MF,2.5W, 200V,50ppm,,, C N Y NOTE-ORIGINAL PART FOR R033 WAS RES 045 HAD INSUFFICIENT POWER RATING USE MINIMUM 1WATT PART 1.00000 1.00000 1.00000 1.00000 ONES ONES ONES ONES R R034 R R035 R R036 R R037 RES 033 RES 013 RES 050 RES 038 6K2,1%,MF,1/4W,0.25W,200V,50ppm,,, C 180K,1%,MF,1/4W,0.25W,200V,50ppm,, C , 0R1,10%,WWE,W21,2.5W,100V,75ppm,,, C 2K2,1%,MF,1/4W,0.25W,200V,50ppm,,, C N N N N Y Y Y Y
R R039 R R040 R R041 R R042
RES 058 RES 017 RES 002 RES 009

33K,1%,MF,1/4W,0.25W,200V,50ppm,,, C 4K7,1%,MF,1/4W,0.25W,200V,50ppm,,, C 150R,1%,MF,1/4W,0.25W,200V,50ppm,, C , 27R,1%,MF,1/4W,0.25W,200V,50ppm,,, C
R R043 R R044 R R045 R R046
RES 033 RES 013 RES 038 RES 050
6K2,1%,MF,1/4W,0.25W,200V,50ppm,,, C 180K,1%,MF,1/4W,0.25W,200V,50ppm,, C , 2K2,1%,MF,1/4W,0.25W,200V,50ppm,,, C 0R1,10%,WWE,W21,2.5W,100V,75ppm,,, C

R R048

RES 058
33K,1%,MF,1/4W,0.25W,200V,50ppm,,, C
1.00000 ONES R R049 NO INFO 2.4K,10%,WWE,W21,2.5W,100V,75ppm,, C N NOTE ORIGINAL PART WAS 0.25W HAD INSUFFICIENT POWER RATING. USE MINIMUM 2.5W PART 1.00000 1.00000 ONES ONES R R050 R R051 RES 078 RES 063 4K3,1%,MF,1/4W,0.25W,200V,50ppm,,, C 18R,1%,MF,1/4W,0.25W,200V,50ppm,,, C N N

15-AUG-00 Page 8

T C.Des - ----R R052 R R053
Part Number ----------RES 048 RES 009
Description Type Kit Cost -------------- --- ---12R,1%,MF,1/4W,0.25W,200V,50ppm,,, C N Y 27R,1%,MF,1/4W,0.25W,200V,50ppm,,, C N Y
R R055 R R056 R R057 R R059
RES 009 RES 048 RES 009 RES 018
27R,1%,MF,1/4W,0.25W,200V,50ppm,,, C 12R,1%,MF,1/4W,0.25W,200V,50ppm,,, C 27R,1%,MF,1/4W,0.25W,200V,50ppm,,, C 15K,1%,MF,1/4W,0.25W,200V,50ppm,,, C

R U001 R U002

IC 005 IC 006
LM317T,VOLTAGE REGULATOR,TO220, 317T,NATSEM, LM337T,VOLTAGE REGULATOR,TO220, 337T,NATSEM,THOM