Shure VA302 SERIES Operating And Service Manual Download Page 21 | Manualshive

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Summary of Contents for VA302 SERIES

Page 1: ...A302 SERIES hfd M fih OPERATING AND SERVICE MANUAL Manufactured by SHURE BROTHERS INC 222 Hartrey Avenue Evanston Illinois 60204 U S A Copyright 1978 Shure Brothers Inc AL406 RE 27A818 Printed in U S...

Page 2: ...5 000ohms Output 19 db below speaker output to 8 ohm load nominal 2 V at 50 watts to speakers Clipping Level 4 V Mic Level Output Hi Z impedance 1 000ohms Output 30 db below auxiliary output nominal 6...

Page 3: ...list the Vocal Master Sound System provides the required porta bility flexibility and dependability demanded by profes sional entertainers The mixerlpower amplifier Control Console permits the user to...

Page 4: ...Figure 2 11 Line Cord Storage Spindles 12 A C Line Cord 13 D C Fuse 3AG 5A 14 A C Fuse 3AG 3A SB 15 Thermal Overload lndicator Lamp 16 Reverb Switch Remote Control Jack Phone Type 17 Speaker Output J...

Page 5: ...r lndividual Channel Volume Con trols 5 which are being used By use of the individual Channel Volume Controls 5 the microphones may be balanced for level so that the sound coming from the speakers is...

Page 6: ...aker loads of less than 5 3 ohms more than three VA300 S Speakers should not be used with this amplifier No dam age to the speakers or amplifier will occur but thermal shutoff of the amplifier overhea...

Page 7: ...e audience The easiest way to do this is put the speaker columns on the stage If the stage is only a foot or two high raise the speaker columns up by placing them on a solid platform or box Keeping in...

Page 8: ...e terminal of the connector the blue conductor to the neutral ter minal and the green yellow conductor to the earth terminal The VA302E6 C is designed to operate from 100 120 140 200 220 or 240 volts...

Page 9: ...setting of 5 for vocalists though higher settings may be required for instruments Separate Reverb Bass and Treble controls 3 are provided for the reverb signal only and are independent of the other to...

Page 10: ...ed to provide a high impe dance output connector Pin 3 is hot and Pin 1 is ground See figure 4 SHIELD _ _ _ L MIC OUTPUT MIC OUTPUT HIGH IMPEDANCE LOW IMPEDANCE BALANCED LINE MICROPHONE OUTPUT PLUG CO...

Page 11: ...ached to the Console micro phone input The Console Attenuator switch should be in the In position NOTE It may be necessary to add a Shure A15A Attenuator to provide an additional 15 dB of attenuation...

Page 12: ...horized COMMON MIX BUS MODIFI CATION is available Contact your Shure Dealer or the Shure Factory for further information on this Additional Power or Area Coverage In those applications which require m...

Page 13: ...low capacitance single conductor shielded type such as Belden 8401 8410 8411 to avoid high frequency signal loss and to reduce the possi bility of hum pickup in the cables Stereo Operation Stereo oper...

Page 14: ...plifier may be pulled forward at this point and assure long life CAUTION There are no user serviceable separated from the case parts inside Refer servicing to qualified service personnel AUX MIC LEVEL...

Page 15: ...rform the following modification if not already per formed solder a 3 3k Y2W resistor across the terminals to which the white and black leads of transformer T2 are connected Add a second ground wire f...

Page 16: ...paghetti should be placed over the diode and connecting leads the diode should be securely clamped to the heat sink with the clamp Defective transistors and diodes may be located by use of an ohmmeter...

Page 17: ...13 Page 16 may be removed and returned to the factory Service De partment for repair if a malfunction should occur The am plifier can be operated without this assembly To eliminate possible damage or...

Page 18: ...speak ers individually Any buzzes or rattles indicate pos sible failure The speakers should all sound gener ally alike with a slight difference between the 8 inch and 10 inch loudspeakers 7 Reconnect...

Page 19: ...tchcraft No C3F Switchcraft No 12 A Switchcraft No 14 8 Switchcraft No 11 Switchcraft No C3M NONE NONE NONE Gibbs No 4L Insulated Output NONE NONE NONE NONE NONE NONE NONE NONE NONE Littelfuse No 3420...

Page 20: ...10 All volume controls set to maximum 11 Master reverb switch set to OUT position except as noted 12 Individual channel reverb switches set to OUT posi tion except where noted 13 Transistor voltage m...

Page 21: ...I VA302 C CIRCUIT DIAGRAM I FIGURE 17...

Page 22: ...VERLOAD GRWBLK RED BLACK TI BLUE 2 0 0 2 4 0 VOLT 1 6 AT 100 140 VOL TI 2 4 0 V POSITION CHASSIS POWER S I 5 7 2 4 I 4 I 4 I 4 I 4 I 1 0 0 V POSITION 120 V POSITION 140 V POSITION 2 0 0 V POSITION 2 2...

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