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Mackie M 1400 Service Manual

Other manuals for M 1400: Owner's Manual
Manual is about: Fast Recovery Series

Summary of M 1400

  • Page 1

    M•1400 / m•1400i / m•1200 service manual 1998 mackie designs, inc. 820-179-00 version 1.2.

  • Page 2: Caution

    Caution avis risk of electric shock do not open risque de choc electrique ne pas ouvrir caution: to reduce the risk of electric shock do not remove the cover no user serviceable parts inside refer servicing to qualified personnel warning: to reduce the risk of fire or electric shock, do not expose t...

  • Page 3

    ® table of contents introduction............................................................. 2 system overview ....................................................... 3 summary of features .....................................................................4 specifications............................

  • Page 4

    M•1200/m•1400 service manual introduction 2 introduction this manual contains complete service information for the m•1200, m•1400 and m•1400i audio power amplifiers. Operating instructions will be touched on briefly. For complete operating instructions refer to the owner’s manual. The fr series m•12...

  • Page 5

    Version 1.1 system overview 3 system overview this section provides a quick summary of the m•1200/m•1400’s major features. It is not intended to take the place of the owner’s manual. It is included here to help servicing technicians familiarize themselves with the m•1200/m•1400. Differences between ...

  • Page 6

    M•1200/m•1400 service manual summary of features 4 summary of features front panel 1. Gain detented gain controls adjust the level sent to each output section. The gain structure is designed so that a +4dbu (1.23v rms) input signal drives the amplifier to full rated power into 4 Ω. 2. Meters the m•1...

  • Page 7

    Version 1.1 system overview 5 rear panel 1. Speaker outputs the m•1400 has speakon connectors where the m•1200 has ¼” speaker outputs. Both models have binding posts. For bridged mono operation, the + output comes from channel one’s positive terminal and - from channel two’s positive. 2. Input the m...

  • Page 8

    M•1200/m•1400 service manual specifications 6 specifications continuous average output power, both channels driven: m•1200 225 watts per channel into 8 ohms from 20hz to 20khz, with no more than 0.025% thd 400 watts per channel into 4 ohms from 20hz to 20khz, with no more than 0.050% thd 600 watts p...

  • Page 9

    Version 1.1 specifications 7 rise time: slew rate: voltage slew rate > 50v/µs > 100v/µs bridged current slew rate > 32a/µs at 2 Ω cmrr: > 40 db, 20hz to 20khz load angle: 8(±jx) time independent at 8 Ω 4(±jx) time dependent, t > 6 min. At 4 Ω 2(1±jx) time dependent, t > 2 min. At 2 Ω transient recov...

  • Page 10

    M•1200/m•1400 service manual circuit theory 8 circuit theory much of the circuitry in the m•1200/m•1400 is self explanatory from the schematic. This section will explain the unique circuits and architecture. Samples in this section will refer to channel 1 (left) for circuitry that is identical on bo...

  • Page 11

    Version 1.1 circuit theory 9 protection circuits refer to schematics on pages 27-29. The m•1200/m•1400 has two output protection circuits in addition to the rail fuses. The first mutes the amp if the output devices are loaded beyond their safe operating area (soa). The second is a crowbar circuit th...

  • Page 12

    M•1200/m•1400 service manual circuit theory 10 thermal management refer to schematic on page 29. The m•1200/m•1400 t-design heatsink/fan cools output devices evenly and does not collect dust on the circuitry. The fan operates at two speeds, controlled by the amplifier. An lm35dz mounted in the cente...

  • Page 13

    Version 1.1 service procedures 11 service procedures mechanical procedures the m•1200/m•1400 design allows easy removal of all components and assemblies. Disassembly and reassembly should be self evident. This manual has exploded diagrams in the parts section. Several important points concerning the...

  • Page 14

    M•1200/m•1400 service manual service procedures 12 troubleshooting tips - output failures after a catastrophic failure, it is likely that the four +/-80v supply fuses will be blown. Replace fuses and very slowly bring up the variac while monitoring line consumption. It is likely that substantial lin...

  • Page 15

    Version 1.1 service procedures 13 bias and test procedure after the unit has been repaired, the following should be done to assure long term reliable operation. If a distortion analyzer is present, distortion specifications should be verified. 1. Adjusts bias in both channels (r1 & r51) for 8mv +/- ...

  • Page 16

    M•1200/m•1400 service manual service procedures 14 (this page unintentionally left blank), those responsible have been put to the sword.

  • Page 17

    Version 1.1 parts 15 parts quick parts front panel ol - 3 - 6 - 2 0 -3 -6 -9 - 2 0 sig o l sig ch 1 30 28 26 20 22 18 2 4 1 6 1 4 8 1.23v (+4dbu) sensitivity gain /db ch 2 protect col d hot short temp status internalstatus ch 1 c h 2 ch 1& 2 o n off power 3v 2v 1v 3 0 2 8 2 6 2 0 2 2 1 8 24 16 14 8 ...

  • Page 18

    M•1200/m•1400 service manual parts 16 chassis assembly 4 5 8 1 2 3 6 1 7 1 11 9 10 12 13 15 16 17 18 14.

  • Page 19

    Version 1.1 parts 17 chassis assembly parts list item # part # description notes 1 700-028-02 sems 6-32x3/8 php blkzc all side panel screws 2 550-221-00 top cover - m1200 3 700-041-04 mch 6-32x3/8 fl 100dg blk top cover to chassis 4 551-029-00 extr scrn dsply bzl-m1200 4 551-029-10 extr scrn dsply b...

  • Page 20

    M•1200/m•1400 service manual parts 18 heatsink assembly.

  • Page 21

    Version 1.1 parts 19 heatsink assembly parts list item # part # description 1 551-032-00 extr fab heatsink - m1200 2 410-003-00 insl silpad k6 w/adhesive 3 055-081-00 pcb assy main - 1200 3 080-072-01 pcb assy main - m1400 3 080-072-02 pcb assy main - m1400i 4 550-255-00 piggyback clip 5 700-058-02 ...

  • Page 22

    M•1200/m•1400 service manual parts 20 complete parts list 040- cables 055- finished pcb assys 100- pots and resistors 200- capacitors 300- semiconductors 400- jacks/connectors 500- switches 510- fuses 550- chassis metal 600- transformers 601- inductors 610- wires and cables 640- ac line cords 700- h...

  • Page 23

    Version 1.1 parts 21 part # description 140-111-00 res tf sm .1w 5% 36k ohm 140-115-00 res tf sm .1w 5% 51k ohm 140-123-00 res tf sm .1w 5% 100k ohm 140-124-00 res tf sm .1w 5% 120k ohm 140-139-00 res tf sm .1w 5% 470k ohm 140-147-00 res tf sm .1w 5% 1m ohm 145-318-00 res mf sm .1w 1% 2k00 ohm 145-3...

  • Page 24

    M•1200/m•1400 service manual parts 22 part # description 400-172-00 term solder-in 18awg 400-173-00 term .25 qkds pcmt stable 400-210-00 term qdisc .250 f 18-22ga 400-214-00 jack 1/4 v pcmnt 1mm wash 410-003-00 insl silpad k6 w/adhesive 500-022-00 sw rckr illuminated 500-023-00 sw slide 4p3t mini 50...

  • Page 25

    Fr series fuse upgrade bc 6/20/97 the mixer fixer • mackie designs service the mixer fixer • mackie designs service news news fr series fuse upgrade model: fr series m1200/1400, 110v only serial #: m1200 prior to sn# af12626 effective 4/28/97 m1400 prior to sn# ah12657 problem: original fuse (15a) r...

  • Page 26

    Fr tywrap mod bc 4/28/97 the mixer fixer • mackie designs service the mixer fixer • mackie designs service news news fr tywrap mod model: fr series m1200/1400 serial #: afxxxxx to afxxxxx effective 5/8/97 problem: the primary and secondary wires get pinched between the top cover and the fan shroud. ...

  • Page 27

    Fr series amplifier ribbon replacement instructions (new! Improved! July 2000) * models affected: fr series m1200, m1400, m1400i m1200: all models. M1400i: before serial # da20889 and all models with “am” prefix. M1400 and 230v versions: before serial # db12700 and all models with “ah” prefix. Add t...

  • Page 28

    The mackie fixer • mackie designs service news ribbon modification sse july 2000 ribbon mod.Pdf, page 2 of 2 input board work: if the two ribbon cables are soldered to the input board, follow steps 7 to 11. If not, then go to step 12. 7. Remove the metal shield plate and insulator sheet from the bac...

  • Page 29

    M•1200/m•1400 input pcb 055-079-00 rev-d 23.

  • Page 30

    M•1200/m•1400 input pcb 055-079-00 rev-d 24.

  • Page 31

    M•1200/m•1400 display pcb 055-080-00 rev-a 25.

  • Page 32

    M•1200/m•1400 display pcb 055-080-00 rev-a 26.

  • Page 33

    M•1200/m•1400 main pcb 055-081-00 rev-d 27.

  • Page 34

    M•1200/m•1400 main pcb 055-081-00 rev-d 28.

  • Page 35

    M•1200/m•1400 main pcb 055-081-00 rev-d 29.

  • Page 36

    M•1200/m•1400 main pcb 055-081-00 rev-d 30

  • Page 37

    M•1200/m•1400 soft start pcb 055-162-00 rev-a 31.

  • Page 38

    M•1200/m•1400 soft start pcb 055-162-00 rev-a 32.