Nakamichi BlackBox Series, Service Manual

Page 1: ...Service Manual Nakamicni BlackBox Series PS 100 SF 100 LA 100 BA 150 MB 150 EC 100 MX 100 Power Supply Sub sonic Filter Line Amplifier Bridging Adaptor MC Booster Amplifier Electronic Crossover Microp...

Page 2: ...rdsscascneceussetonadsbecasuerswwseetee 20 General Specifications System Diagram Seemae Dieacsn Mounting Diagram and Parts List Mechanism Ass y and Parts List 1 PS 100 POWER SUPPLY General As a result...

Page 3: ...mber of Units ie N Schematic Diagram MUTE Q402 280235 C404 470 25V 120V T1 BRN YEL M3 5P Terminal O i C402 100 25V C405 220u 25V Power Switch M2 Spark Killer Wl ozo AC INPUT 120V Q405 U S A CANADA BLK...

Page 4: ...Diode Carbon Resistor Carbon Resistor Carbon Resistor Carbon Resistor Carbon Resistor Carbon Resistor Carbon Resistor Carbon Resistor Carbon Resistor Carbon Resistor Carbon Resistor Carbon Resistor C...

Page 5: ...Power Switch Cord Bushing Cord Bushing Cord Bushing Power Cord Power Cord Power Cord Power Cord wed wh eke ed ed etd etd eA wd td Fig 1 3 Schematic ee HA03697C 0H03437A OBO8361A OB08363A OB08342A 0B08...

Page 6: ...load impedance is lowered with R and the improvement Out aSee eaeeee ind of characteristics can be realized by changing impedance OF ne outof of every device _ouut Mute Switch In addition a high pass...

Page 7: ...3 OUTPUT OUTPUT C nae Ri09 o OUT at 8 ByOK 330K On woxe IN ec Om ine ouTPuUT 6 Zo 5602 r PIN RI 10KQ MUTE R119 D103 Ig le 181555 47K sis No J ziss 8 mit al 9 8V Baas s CN I4 1c201 a 204 INPUT 8LY G K...

Page 8: ...t Chassis 1 2A JAO3061A Push Button Ass y 2 OE00507A Nut Hex M3 0J03440A Switch E Block Base 1 OE00037A Earth Lug B 5 0B08290B 6P Pin Jack 1 OEO00594A Screw M3x8 Philips Binding 0J03277A Metal Seat Nu...

Page 9: ...a a Vom 12 dB S close S open 1M 9 1 k 27 k Aya IM eS 8 18 dB 6 8 k 6 8k Schematic Diagram L A P C B an Can 101 102 C101 2SC1222 e CN 2 3 34 pals jy x2 rN R17 9 1K G Ci07 410P Specifications Maximum P...

Page 10: ...No R110 210 R111 211 R112 212 R113 213 R116 216 R117 217 R118 218 R119 219 R121 122 221 222 R123 223 R124 224 C101 201 C102 202 C103 203 C104 108 204 208 C105 106 205 206 C107 207 SWw1 CN1 CN2 0OB056...

Page 11: ...ase 6P Pin Jack Metal Seat Nut 4P DIN Socket Main Chassis LA Rubber Foot Screw M3x6 Philips Truss Head Screw M3x6 Philips Binding Head Fig 3 4 OE00157A OEOO606A 0E00612A OE00594A 0E00037A 0E00714A OE0...

Page 12: ...7 constitute a phase inverter and the output of Q107 is a phase inverted signal of the input that is this unit receives an input signal and outputs it as a non inverted output and a phase inverted out...

Page 13: ...102 105 O0B01389A Electrolytic Capacitor OBOGO13A Transistor 2SA733 202 205 4 7 16V C103 203 0B01404A Electrolytic Capacitor 47y 6 3V C104 204 OBO05599A Ceramic Capacitor 150P 50V OBO1909A Silicon Dio...

Page 14: ...A 150 BAO3863A BA 150 P C B Ass y 0B08290B 6P Pin Jack 0JO3277A Metal Seat Nut OBO8355A 4P DIN Socket HA03709A Main Chassis BA Ass y 0H03437A Rubber Foot 0E00713A Screw M3x6 Philips Truss Head OEQO606...

Page 15: ...mplification he _ s are equal therefore d c voltage across the input terminals vanishes at the identical values of and power supply voltage In actual circuits However a or voltage slightly remains due...

Page 16: ...3A 0J03440A Switch E Block Base 1 OE00612A Screw M3x6 Philips Pan Head JAO3061A Push Button Ass y 2 2A 0B03920B Ground Terminal 1 0E00732A Washer 3 mm O0JO3277A Metal Seat Nut 2 OE00037A Earth Lug B...

Page 17: ...85A OBO5511A 0B01793A OBO05649A OBO5558A OBO5545A OBO5661A 0B01879A OB05818A OBO05562A OBO05952A OB05746A OB05854A 0B01920A OBO5567A 0B01833A OB01914A OB01289A OB05884A 0B01288A 0B01290A 0B07167A 0B08...

Page 18: ...istance and capaci tance simultaneously to the system changing only the resistance Note Specifications Maximum Power Consumption Current Consumption Attenuation es ses e 8s 8 es 8s e 8 8 s 8 8 8 8 8 6...

Page 19: ...tor 470K ERD 25V J Carbon Resistor 82K ERD 25V J Carbon Resistor 220 ERD 25V J Carbon Resistor 150K ERD 25V J Carbon Resistor 22 ERD 25V J Carbon Resistor 390 ERD 25V J Carbon Resistor 10K ERD 25V J C...

Page 20: ...er MX 6P Pin Jack Metal Seat Nut 4P DIN Socket Main Chassis EC Ass y Rubber Foot Screw M3x6 Philips Truss Head Dm PB AQ A a a 2 GW w 19 OE00593A 0 00157A OEOO606A 0E00507A 0E00037A OE00594A 0E00714A O...

Page 21: ...Av L R Rx RY oa ere 1 and the gain of blend microphone amplifier RY2 9 Av B Ry Rxp RY Swaine eee teh Ok Beate The gains of the mixing amplifier il Av ML Av MB R R3 for L channel mic amp output R Ra fo...

Page 22: ...v oe MIC Ri02 x Leh 100 9 N ae ae o 2SA7T33 BLK Q104 1a 2sc1222 NUN oF YEL o OUTPUT wo on Q106 700 Vv 28C945 be R15 a 40K G BLU MIC Rech 0 2mvV BLK OUTPUT UO Rech 100mV DIN JACK BLEND MIC 6 0 2mV 8 Q3...

Page 23: ...A 107 108 201 204 207 208 301 304 C102 202 0B01288A 302 C103 203 0B01394A 303 C105 106 OBO5885A 205 206 305 306 C109 110 OBO5841A 209 210 CN1 OB08236A 22 n Carbon Resistor 470 Carbon Resistor 47K Carb...