Genaxxa 32-8207 Mixer-Full Manual 电路图.pdf

STEREO SOUND MIXER Cat. No. 32-8207 Specification . . . . . . . . Block Diagam . . . . . . . Circuit Description . . . . . Troubleshooting . . . . . PCB Views . . . . . . . Electrical Parts List . . . Exploded View . . . . I IC Lead Identification . . Voltage Chart. . . . . . Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 .6 .7 .-12 .14 . . . . . . . . . . . . . . . . . . . . . . . . . . .15 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 994 InterTAN Inc. All Rights Resewed. Trademark of InterTAN Inc. RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS Input Sensitivity/Impedance: MIC . 3mV / 600 ohms PHONO 1,2 . 3mV / 50k ohms CD 1,2. 150mV / 50k ohms VIDEO. 150mV / 50k ohms LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Level: MASTER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mV / 50k ohms . . . . . . . . . . . . . . RATED: 1.5V MAX : 6V RECORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RATED: 0.775V MAX : 5V PHONES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RATED: 28.28mV S/N Ratio: MIC. 60 dB PHONO. 70 dB CD,LINE,VIDEO . 75 dB Distortion: MIC. 0.5% PHONO. 0.2% CD,LINE,VIDEO. 0.02% Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370mm(L)x212mmWx65mm(H) -2- RadioFans.CN 收音机爱 好者资料库 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. AND THE PHONO l(IC3.VR2)/PHONO 2 (IC4/VR3) LIKEWISE. (IC3/IC4 IS A MATCH TO RIAA CURVES UNLINEAR AMPLIFIER) THE SIGNAL OF CDl/VIDEO FROM INPUT JACK IS DIRECTLY SEND TO THE LEVEL CON- TROL(VR4), THEN SEND TO THE MIXING BUS. AND CD2/LINE LIKEWISE. 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 OUT- PUT 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) OF EACH CHANNELS GOES THROUGH THE MONITOR SELECT swI- TCH (ROTARY SWITCH SW1)WHICH IS THEN TRANSMITTED TO THE HEADPHONE AMPLIFI- ER(IC8) C6 c7 C8 c9 Cl0 Cl1 Cl2 Cl3 Cl4 Cl5 Cl6 Cl7 Cl8 Cl9 c20 c21 c22 C23 C24 C25 C26 C27 CERAMIC10%20PF/lOOV CERAMIC10%20PF/lOOV ELECTROLYTIC 10%470UF/16V ELECTROLYTIC 10%470UF/16V ELECTROLYTIC 10%47UF/16V CERAMIC10%47PF/lOOV ELECTROLYTIC 10%4.7UF/50V ELECTROLYTIC 10%4.7UF/50V ELECTROLYTIC 10%4.7UF/50V ELECTROLYTIC 10%47UF/16V ELECTROLYTIC 10%47UF/16V MYLAR10%O.O022UF/lOOV MYLAR10%O.O082UF/lOOV MYLAR5%O.O082UF/lOOV MYLAR5%O.O022UF/lOOV ELECTROLYTIC 20%4.7UF/50V ELECTROLYTIC 20%4.7UF/50V MYLAR5%O.lUF/lOOV MYLAR5%O.lUF/lOOV ELECTROLYTIC 20%47UF/16V ELECTROLYTIC 20%47UF/16V ELECTROLYTIC 20%4.7UF/50V ELECTROLYTIC 20%4.7UF/50V ELECTROLYTIC 20%47UF/16V ELECTROLYTIC 20%47UF/16V MYLARO.O022UF/lOOV MYLAR5%O.O082UF/lOOV 09CClOOK20PF 09CClOOK20PF 05CE16M470UF 05CE16M470UF 05CE16M47UF 09CClOOK47PF 05CE50M4.7UF 05CE50M4.7UF 05CE50M4.7UF 05CE16M47UF 05CE16M47UF 08CMlOOJ0.0022UF 08CMlOOJ0.0082UF 08CMlOOJ0.0082UF 08CMlOOJ0.0022UF 05CE50M4.7UF 05CE50M4.7UF 08CMlOOJO.lUF 08CMlOOJO.lUF 05CE16M47UF 05CE16M47UF 05CE50M4.7UF 05CE50M4.7UF 05CE16M47UF 05CE16M47UF 08CMlOOJ0.0022UF 08CMlOOJ0.0082UF -9-