Shure SR109 Operation And Service Manual
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Shure SR109 Operation And Service Manual

Shure SR109 Operation And Service Manual

Professional mixer eight-channel microphone mixer-preamplifier
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SR109 Professional Mixer
OPERATION AND SERVICE MANUAL
Manufactured by
SHURE BROTHERS INC.
222 Hartrey Avenue
Evanston, Illinois 60204 U.S.A.
WARNING
To reduce the risk o f fire or electric shock, d o not
expose this appliance t o rain o r extreme moisture.
Copyright 1979, Shure Brothers Inc.
27A1413 (SG)
Printed in U.S.A.

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Summary of Contents for Shure SR109

  • Page 1 222 Hartrey Avenue Evanston, Illinois 60204 U.S.A. WARNING To reduce the risk o f fire or electric shock, d o not expose this appliance t o rain o r extreme moisture. Copyright 1979, Shure Brothers Inc. 27A1413 (SG) Printed in U.S.A.

  • Page 2: Specifications

    SR109 Professional Mixer SPECIFICATIONS ..Signal to Noise Equipment Type All silicon transistor mixer/pre- ..(20 Hz-20 kHz) .Typically 83 dB at maximum out- amplifier put with one channel Volume Number of Control and MASTER Volume .
  • Page 3 (earth). May be used to power accessories up to Limiter 50 mA. Threshold ..Operating Voltage .90-132 Vac, 50/60 Hz (SR109) ..(adjustable) .Typically -20 to +20 dBm (at 90-132, 180-250 Vac, 50/60 Hz LlNE LEVEL output) (SR109-2E) ....

  • Page 4: Table Of Contents

    ..Redundant Mixers SR109 Professional Mixer Front Panel ....... .

  • Page 5: Description

    (SR109 only). The SR109 contains a peak-responding, adjustable out- The following are designed for use with the SR109 Pro- put limiter with an in-out switch and an indicator lamp fessional Mixer: that flashes when the limiter is operating. The front panel...

  • Page 6: Sr109 Professional Mixer Front Panel

    FIGURE 1. SR109 PROFESSIONAL MIXER FRONT PANEL (SR109-2E Only) FIGURE 2. SR109 PROFESSIONAL MIXER REAR PANEL...

  • Page 7: Functional Identification

    AC (MAINS) POWER 3-Pin Connector Connects ac output. (Meets all current standards for VU Meters.) line cord to Mixer power supply (SR109-2E only). PHONES Rotary Control Controls volume level to 180-250V 0.1 AT/90-132V 0.2AT SLO-BLO Ac Fuse PHONES Jack (8).

  • Page 8: Mounting And Ventilation

    7, for detailed information.) If a Shure SR110 adjust limiter as follows: Operate Mixer with program Monitor Mixer is to be used with the SR109, connect material and adjust the channel and MASTER Volume multi-pin plug of SR110 to ACCESSORY OUTPUT Controls (1, 9) for desired sound level.

  • Page 9: Power Supply

    POWER SUPPLY SR109: The Mixer regulated power supply is designed to operate from 90 to 132 volts ac, 50/60 Hz without ad- justments, allowing the Mixer to meet all specifications over this wide range of ac input voltages. A three-con- ductor, grounded line cord (12) supplies ac power to the Mixer through the front-panel POWER Switch (9).

  • Page 10: Functional Circuit Description

    Mixer this section. through the front-panel POWER ON-OFF Switch (9). The SR109-2E line cord does not have a connector on the INPUT CHANNELS power source end of the cord. Obtain a suitable three-'pin...

  • Page 11: Program Mix Amplifier

    LlNK OUTPUT signal from the MASTER Vol- and the power supply connections. The SR110 is a self- ume Control (9). Note that the SR109 and the Shure SR101 contained, eight-channel, line level mixer designed for Audio Console may be interconnected in the same manner.

  • Page 12: Limiter

    30 dB. Set the limiter THRESHOLD ADJ Control (10) as fol- of external equipment, such as a Shure SE30 Gated Com- lows. Operate the Mixer with program material, and adjust pressor/Mixer which in turn feeds a broadcast line, dis-...

  • Page 13: Special Operating Instructions

    The previous section described normal interconnection nel 7 or 8 jack with MIC/LINE Switch in LlNE position). If and operation of the SR109 Professional Mixer; this section the source is unbalanced, connect the cable shield to pin provides information on special set-ups to more fully uti- 1 and the hot conductor to pin 3 of the input jack.

  • Page 14: Tape Recording

    A better method of performing this interconnection in- To play records through the Mixer using a turntable or volves the use of a phono preamplifier such as the Shure record changer with a stereo magnetic cartridge and no M64 Stereo Preamplifier (see Figure 96, Page 10). In...

  • Page 15: Tape Playback

    (phone jack) (Figure 11 C, Page 11). nect a cable from the tape recorder auxiliary or line level If a mixer is to be used with the SR109 but it is desirable output to the channel 7 or 8 LlNE LEVEL lnput Jack (19).

  • Page 17: Remote Volume Control

    An ideal method of recording the SR109 output in stereo is to use two SR110 Professional Monitor Mixers. This method allows the SR109 output to be used for the PA system. Connect the SRllOs as shown in Figure 14, Page 13, with the output of one SR110 feeding the left input of the tape recorder and the other SR110 feeding the right.

  • Page 18: Telephone Line Surge Protection

    3AG-3/16A Slo-Blo fuse (DI,D2) mounted on the front panel, remove the outer (SR109 only; SR109-2E contains a 0.1A Slo-Blo fuse for insulating tubing and mounting ring from the rear of the 180- to 250-volt operation, or a 0.2A Slo-Blo fuse for 90- LED.

  • Page 19: Board Removal

    "1 1 : ; 1 Unsolder both LED gray leads from the Power Supply as- Main Board (Cont'd.) sembly. Remove the Power Supply assembly and VU Meter Black White/Red (see VU Meter Removal, Page 16). Unsolder the LED White Green orange lead from the LIMITER OUT-IN Switch (S12) or Brown THRESHOLD ADJ Control (R10) (depending on which is to...

  • Page 20: Limiter Internal Adjustment

    FIGURE 16. PRINTED CIRCUIT BOARD AND PARTS LOCATION Program Mute (Board 0): Remove the board from the VU METER REMOVAL If the VU Meter (MI) requires replacement, remove it as four nylon fasteners securing the board to the vertical bracket and lift upward. follows.

  • Page 21: Parts Removal

    ohmmeter "plus" probe on the anode end of a diode, and to +4 and connect a 600-ohm load and an ac voltmeter the "minus" probe on the cathode end, the ohmmeter across the LINE LEVEL OUTPUT (J12-J14). Turn on the should read approximately 2000 ohms or less.

  • Page 22: Service Illustrations

    Immediately following the parts list on the pages that fol- The following optional companion unit and accessory low are parts location drawings (Figures 18 to 22, Pages are designed for use with the Shure SR109 Professional 24-27), and an overall Circuit Diagram (Figures 24 and Mixer: 25, Pages 30 and 32-33).

  • Page 23: Replacement Parts List

    NOTE: and mechanically similar, and may be used if direct factory replacements are not immediately available. To maintain highest possible performance and reliability, Shure Factory Replacement Parts should be used. insure low noise figure, order transistors from Shure Brothers Inc.
  • Page 24 REPLACEMENT PARTS LIST FOR SR109 PROFESSIONAL MIXER Commercial Reference " e g ~ m f n t Replacement Kit Consists Of: Alternate Designation Part No. Description Qty. Connector, Spin, AC (MAINS) 95A689 None POWER (SR109-2E only) Ferrite Bead Ring Stackpole 57-0181 ;...
  • Page 25 Kit No. Designation Part No. Description Qty. 51 D228 Transformer, Headphone None Output 51A262 Transformer, Ac Power (SR109) None 51A265 Transformer, Ac Power (SR109-2E) None Line Cord, Ac, Grounded, Belden 17408 95A632 2.7m (9 ft) (SR109) 90A1888 Line Cord, Ac, Grounded, %Foot,...
  • Page 26 REPLACEMENT PARTS LIST FOR SR109 PROFESSIONAL MIXER Commercial Reference Replacement Replacement Kit Consists Of: Designation Kit No. Alternate ~ t y . part NO. Description EQUALIZER (BOARD 2) 1 - 1 C200, C201, 86A630 Capacitor, Electrolytic, Sprague 30D-TE1303; C205. C208 4.7 or 5 , F , 35V...
  • Page 27 REPLACEMENT PARTS LIST FOR SR109 PROFESSIONAL MIXER Commercial Reference Replacemtent Replacement Kit Consists Of: Designation Kit No. Alternate Qty. Part No. Description 1 1 1 RKC65 86A334 Transistor, Silicon, NPN 1 - 1 86A348 Transistor, Silicon, Low Motorola or Fairchild 2N5087...

  • Page 29: Board 2: Channel Equalizer

    FIGURE 19. BOARD 2: CHANNEL EQUALIZER 2247-2/2246-3/587-4...

  • Page 31: Board 0: Program Mute

    FIGURE 21. BOARD POWER SUPPLY 2210-9/2251-3/591-4 FIGURE 22. BOARD 0: PROGRAM MUTE 2254415923...

  • Page 33: Notes To Circuit Diagram

    GENERAL fuses, and power supply output (30V between pins Shure part numbers are not shown in the Parts List ac- G, Board 9). If the indicator lamps are on but the output is companying the Circuit Diagram (Figures 24 and 25, Pages...

  • Page 34: Dc Voltage Measurements

    To test transistors and diodes, see Page 17. Line voltage: 120V, 50/60 Hz (SR109) 120V or 240V, 50/60 Hz (SR109-2E) 3. To check LEDs, see Page 17. No input signal applied. To check opto-isolator, see Page 17. 81227-11-1 FIGURE 24. SR109-2E POWER SUPPLY CIRCUIT DIAGRAM...
  • Page 35 FIGURE 25. SR109 PROFESSIONAL MIXER CIRCUIT DIAGRAM...
  • Page 36 MAIN BOARD FIGURE 25. SR109 PROFESSIONAL MIXER CIRCUIT DIAGRAM...

  • Page 37: Condensed Operating Instructions

    The Mixer shall be a Shure Model SR109. * All specifications apply to SR109-2E except: operating voltage is 90-132 or 180-250 volts; no switched receptacle is provided.

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