Genexxa 328207 Owners manual
STEREO SOUND MIXER
Cat. No. 32-8207
Specification
Block
Diagam
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Circuit Description
Troubleshooting
PCB Views
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Electrical Parts List
Exploded View
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IC Lead Identification
Voltage Chart.
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Schematic Diagram
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©1 994 InterTAN
All Rights Resewed.
Trademark of
Inc.
InterTAN
5
6
7
-12
14
15
Inc.
SPECIFICATIONS
Input Sensitivity/Impedance:
MIC
PHONO
CD
VIDEO
LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...................................................
1,2
..............................................
1,2
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......
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3mV / 600 ohms
3mV / 50k ohms
/
150mV
150mV
50k ohms
/
50k ohms
150mV / 50k ohms
Output Level:
MASTER
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
......
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RATED:
1.5V
MAX : 6V
RECORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RATED: 0.775V
MAX : 5V
PHONES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RATED: 28.28mV
S/N Ratio:
MIC
...............................................................
PHONO
CD,LINE,VIDEO
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60
70
75
dB
dB
dB
Distortion:
MIC
...............................................................
PHONO
CD,LINE,VIDEO
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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370mm(L)x212mmWx65mm(H)
-2-
0.5%
0.2%
0.02%
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
LIFIER) MAGNIFICATION, THEN SEND TO THE MIC LEVEL
THE MIC SIGNAL IS SEND TO THE MIXING BUS. AND THE
(IC4/VR3)
THE SIGNAL OF
TROL(VR4),
LIKEWISE.
(IC3/IC4
CDl/VIDEO
IS A MATCH TO RIAA CURVES UNLINEAR AMPLIFIER)
FROM INPUT JACK IS DIRECTLY SEND TO THE LEVEL
THEN SEND TO THE MIXING BUS. AND
MIC
AMPLIFIER
(IC2
CONTROL(VRl),
CD2/LINE
LIKEWISE.
IS A LINEAR AMP-
AFTERWARD,
PHONO l(IC3.VR2)/PHONO
2
CON-
THE SIGNAL OF MIXING BUS GOES TO THE WEIGHTED SUMMING AMPLIFIER(IC6) AND
THEN ON TO THE MASTER GAIN STAGE(IC1) MAGNIFYING IT WHICH RESULTS AS OUTPUT GOING TO THE REC OUTPUT JACKS AND THE MASTER OUTPUT STAGE
(IC5),
AND
THE MASTER OUTPUT STAGE(IC5 IS A LINEAR AMPLIFIER) SEND THE OUTPUT SIGNAL
TO THE OUTPUT JACKS.
THE SIGNAL COMING FROM THE MASTER OUTPUT STAGE(IC5) GOES THROUGH THE VU
METER
AMPLIFIER(IC7),
WHICH IS THEN SHOWN ON THE VU METER.
THE SIGNAL(PRE-FADE)
TCH (ROTARY SWITCH
ER(IC8)
&
MAGNIFIED,THEN GOES TO THE HEADPHONE JACK.
SW1)WHICH
OF EACH
CHANNELS GOES
THROUGH
THE MONITOR
IS THEN TRANSMITTED TO THE HEADPHONE
SELEC
T
AMPLIFI-
swI-
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