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GenEXXA 32-8207 Service Manual

Stereo sound mixer
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STEREO SOUND MIXER
Specification
. . . . . . . .
Block
Diagam
. . . . . . .
Circuit Description
. . . . .
Troubleshooting
. . . . .
PCB
Views
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Electrical Parts List
. . .
Exploded
View
. . . . I
IC Lead Identification
. .
Voltage
Chart.
. . . . .
Schematic Diagram
. . .
Cat. No. 32-8207
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©1 994 InterTAN Inc.
All Rights Resewed.
Trademark of InterTAN Inc.
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Summary of Contents for GenEXXA 32-8207

  • Page 1 STEREO SOUND MIXER Cat. No. 32-8207 Specification ....Block Diagam ....

  • Page 2: Specifications

    SPECIFICATIONS Input Sensitivity/Impedance: ........... 3mV / 600 ohms PHONO 1,2 ..........3mV / 50k ohms CD 1,2 ..........150mV / 50k ohms VIDEO ..........150mV / 50k ohms LINE ....... . . 150mV / 50k ohms ..
  • Page 4 CIRCUIT DESCRIPTION THEORY OF OPERATION AS SHOWN IN THE BLOCK DIAGRAM, THIS MIXER HAS 5 INPUTS AND 3 OUTPUTS. THE DC 15V POWER SUPPLY ENABLES THE 18V/AC ADAPTOR TO BE CONVERTED TO ±15V /DC AND IS USED TO FEED THE IC OF EACH STAGE AND LAMP OF THE VU METER. THE MIC SIGNAL FROM INPUT JACK THROUGH MIC AMPLIFIER (IC2 IS A LINEAR AMP- LIFIER) MAGNIFICATION, THEN SEND TO THE MIC LEVEL CONTROL(VRl), AFTERWARD, THE MIC SIGNAL IS SEND TO THE MIXING BUS.

  • Page 5: Troubleshooting

    TROUBLESHOOTING THIS TROUBLESHOOTING GUIDE SUGGEST AREAS TO CHECK TO FIND PROBLEMS. IN GENERAL, EACH FAULT IS FOLLOWED BY A LIST OF POINTS TO CHECK. THESE POINTS RANGE FROM THE MOST POSSIBBLE TO THE LEAST LIKELY. FAULT POINTS TO CHECK DEAD UNIT * CHECH THE AC ADAPTOR.
  • Page 8 Ref.No. Description RS Part No. MFR'S PART NO. RESISTORS RESISTORS CARBON 1/4W±5% 12RCT1/4JlK 1K OHM RESISTORS CARBON 1/4W±5% 12RCT1/4JlK 1K OHM RESISTORS CARBON 1/4W±5% 12RCT1/4JlK 1OOK OHM RESISTORS CARBON 1/4W±5% 12RCT1/4JlK 100K OHM RESISTORS CARBON 1/4W±5% 12RCT1/4JlOO 100 OHM R 4 7 RESISTORS CARBON 1/4W±5% 100 OHM 12RCT1/4JlOO...
  • Page 9 Ref.No. Description RS Part No. MFR'S PART NO. DIODES DIODE lN4148 lODITlN4148 DIODE lN4148 lODITlN4148 DIODE lN4148 lODITlN4148 DIODE lN4148 lODITlN4148 DIODE lN4001 lODITlN4001 DIODE lN4001 lODITlN4001 DIODE lN4001 lODITlN4001 SLIDE POTENTIOMETERS & SWITCHS 16SV60F1572BlOOK SLIDE POTENTIOMETER 60mm 1OOK B*2 SLIDE POTENTIOMETER 60mm 16SV60F1572BlOOK 1OOK B * 2...