Fostex-MN12-mix-sm维修电路原理图.pdf

MN-12/04 1 MN-12 MN-04 Service Manual Model Mini Mixer RadioFans.CN 收音机爱 好者资料库 2 MN-12/04 SAFETY INSTRUCTIONS Read instructions - All the safety and operating instruc- tions should be read before the appliance is operated. Retain instructions - The safety and operating instructions should be retained for future reference. Heed warnings - All warnings on the appliance and in the operating instructions should be adhered to. Follow instructions - All operating and use instructions should be followed. Water and Moisture - The appliance should not be used near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, and the like. Carts and Stands - The appliance should be used only with a cart or stand that is recommended by the manufac- turer. An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to over- turn. Wall or Ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer. Ventilation - The appliance should be situated so that its location or position does not interfere with its proper ven- tilation. For example, the appliance should not be situ- ated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installa- tion, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings. Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat. Power Sources - The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance. Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an appliance is not defeated. Power Cord Protection - Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience recep- tacles, and the point where they exit from the appliance. Cleaning - The appliance should be cleaned only as rec- ommended by the manufacturer. Nonuse Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time. Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the en- closure through openings. Damage requiring Service - The appliance should be ser- viced by qualified service personnel when: A. B. C. D. E. Servicing - The user should not attempt to service the ap- pliance beyond that described in the operating instruc- tions. All other servicing should be referred to qualified service personnel. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. POUR VITER LES CHOCS LECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRE- SPONDANTE DE LA PRISE ET POUSSER JUSQU AU FOND. CAUTION: ATTENTION: The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and mainte- nance (servicing) instructions in the literature accompanying the appliance. The lightening flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the products en- closure that may be of sufficient magnitude to constitute a risk of electric shock to persons. “WARNING” “TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOIS- TURE.” 1. 2. 3. 4. 5. 6. 7. 8. The power supply cord or the plug has been damaged; or Objects have fallen, or liquid has been spilled into the appliance; or The appliance has been exposed to rain; or The appliance does not appear to operate normally or exhibits a marked changed in performance; or The appliance has been dropped, or the enclosure damaged. 9. 10. 11. 12. 13. 14. 15. 16. 17. RadioFans.CN 收音机爱 好者资料库 MN-12/04 3 TABLE OF CONTENTS 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. CONTROLS, INDICATORS AND CONNECTORS . . . . . . . . . . . . 3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST . . . . . . 4. CIRCUIT & BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . NOTES *Parts List and circuit diagrams are given in this manual to assist the service technician in maintaining the Model MN-12/04. *The following accessories are supplied with MN-12/04 as the standard accessories. MN-12 Owners manual: 8288399000 (for export model) : 8288400000 (for JPN) AC adaptor AD-12A: 8270727003 (for USA/CND) : 8270727006 (for EUR) : 8270727007 (for UK) : 8270727010 (for JPN) MN-04 Owners manual: 8288397000 (for export model) : 8288398000 (for JPN) AC adaptor AD-9A: 8270728003 (for USA/CND) : 8270728006 (for EUR) : 8270728007 (for UK) : 8270728010 (for JPN) *Following is the packing material for the Model MN-12/04. MN-12 PACKING, TOP, MN12: 8228402000 PACKING, BOTTOM, MN12: 8228403000 INNER, CARTON, MN12: 8228725000 MN-04 PACKING, TOP, MN-04: 8288724000 PACKING, BOTTOM, MN-04: 8228404000 CARTON, BOX, MN-04: 8288724000 4 6 8 15 CAUTION Parts marked with this sign are safety critical components. They must always be replaced with identical components. Refer to the Fostex Parts List and ensure exact replacement. RadioFans.CN 收音机爱 好者资料库 4 MN-12/04 1. SPECIFICATIONS MN-12 DEFINITION ( Specification Unit : 0 dBV = 1 Vrms) Normal Fader Position Master faderAt 78 position ConditionAUX RTN : -20 dBV / 1 kHz, AUX RTN VR : Max Adjust Master fader for -10 dBV at STEREO OUT. Input faderAt 78 position ConditionINPUT: -10 dBV / 1 kHz, PAN : L(R), TRIM : LINE, EQ GAIN : 0 Adjust Input fader for -10 dBV at STEREO OUT. INPUT SECTION INPUT 14 Input level-60dBV (MIC) -10dBV (LINE) Impedance20 k or more EQ HI 13dB 3dB ( -10dBV / 10 kHz ) EQ LOW 13dB 3dB ( -10dBV / 100 Hz ) INPUT 5-6, 7-8, 9-10, 11-12 Input level-10dBV Impedance8 k or more AUX RTN Input level-10dBV Impedance8 k or more OUTPUT SECTION STEREO OUT Level-10dBV Load Impedance1k Frequency Response20 20kHz 1.5dB ( INPUT 14 : -60dBV) 20 20kHz 1dB ( INPUT 18 : -10dBV) S/N80 dB or more ( DIN AUDIO,INPUT 14 : -10dBV) 81 dB or more ( IHF-A, INPUT 14 : -10dBV) 63 dB or more ( DIN AUDIO, INPUT 18 : -60dBV) 64 dB or more ( IHF-A, INPUT 18 : -60dBV) Distortion0.01 % or less ( INPUT 18 : 1kHz / 0dBV , OUTPUT : 0dBV ) 0.05 % or less ( INPUT 14 : 1kHz/-50dBV , OUTPUT : 0dBV ) Crosstalk60dB or more at 1kHz Click Noise (Power on / off)-20 dBVp-p or less (OUTPUT VR : MIN) Peak LED Indication0 dBV 3dB AUX SEND Level-10dBV Load Impedance1k Frequency Response20 20kHz +1dB ( INPUT : -10dBV) S/N86 dB or more ( DIN AUDIO,INPUT : -10dBV) 88 dB or more ( IHF-A, INPUT : -10dBV) Distortion0.01 % or less ( INPUT : 1kHz / 0dBV , OUTPUT : 0dBV ) Crosstalk60dB or more at 1kHz Click Noise (Power on / off)-20 dBVp-p or less (OUTPUT VR : MIN) PHONES ConnectorStereo phone Level40mW or more (Normal fader position) Load Impedance32 Frequency Response20 20 kHz 1.5dB ( 32 load, INPUT : -10dBV, OUTPUT : 40mW ) 20 20 kHz 3dB ( 32 load, INPUT : -10dBV, OUTPUT : 40mW ) Distortion0.2 % or less ( 32 load, 1kHz, OUTPUT : 40mW ) GENERAL Dimensions356 (W) 198 (D) 45 (H) mm Weight1.3 kg Power supply USA/CND120VAC, 60Hz EUR/UK230VAC, 50/60Hz JPN100VAC, 50/60Hz RadioFans.CN 收音机爱 好者资料库 MN-12/04 5 MN-04 DEFINITION ( Specification Unit : 0 dBV = 1 Vrms ) Normal Fader Position Master faderAt 78 position ConditionINPUT 4 : -10 dBV / 1 kHz, PAN 4 : L(R) First, set MASTER fader at max. and adjust INPUT 4 fader for -4dBV at STEREO OUT L(R). Then, adjust MASTER fader for -10dBV at STEREO OUT L (R). Input faderAt 78 position ConditionINPUT: -10 dBV / 1 kHz, PAN : L(R), TRIM : LINE Adjust Input fader for -10 dBV at STEREO OUT. INPUT SECTION INPUT 1 Input level-60dBV(MIC) / -50-20dBV(ALC ON) / -10dBV(LINE) Impedance20 k or more INPUT 24 Input level-10dBV Impedance8 k or more OUTPUT SECTION STEREO OUT Level-10dBV Load Impedance1k Frequency Response20 20kHz 1.5dB (INPUT : -60dBV) 20 20kHz +1dB (INPUT : -10dBV) S/N82 dB or more (DIN AUDIO,INPUT : -10dBV) 84 dB or more ( IHF-A, ,INPUT : -10dBV) 56 dB or more (DIN AUDIO,INPUT : -60dBV) 58 dB or more ( IHF-A, ,INPUT : -60dBV) Distortion0.25 % or less ( INPUT : 1kHz/-50dBV/MIC , OUTPUT : 0dBV ) 3.0 % or less ( INPUT : 1kHz/-40dBV/ALC , OUTPUT : 0dBV ) 0.05 % or less ( INPUT : 1kHz/-10dBV/LINE , OUTPUT : 0dBV ) Crosstalk55dB or more at 1kHz Click Noise (Power on / off)-20 dBVp-p or less (OUTPUT VR : MIN) Peak LED Indication0 dBV 3dB PHONES Level1mW or more (Normal fader position) Load Impedance32 Frequency Response80 20 kHz +1-3dB ( 32 load, INPUT : -60dBV ) 80 20 kHz +1-3dB ( 32 load, INPUT : -10dBV ) Distortion0.2 % or less ( 32 load, 1kHz, 200 mW ) GENERAL Dimensions193 (W) 130 (D) 45 (H) mm Weight0.5 kg Power supply USA/CND120VAC, 60Hz EUR/UK230VAC, 50/60Hz JPN100VAC, 50/60Hz *Specifications and appearance are subject to change without notice for product improvement. RadioFans.CN 收音机爱 好者资料库 6 MN-12/04 2. CONTROLS, INDICATORS & CONNECTORS PHONES 10 5 0 AUX RL PAN/ BAL 10 5 0 AUX RL PAN/ BAL 10 5 0 AUX RL PAN/ BAL 0 +- EQ HI + 0 - EQ LO 10 R MIC 5 0 L LINE AUX PAN TRIM 0 +- EQ HI + 0 - EQ LO 10 R MIC 5 0 L LINE AUX PAN TRIM 0 +- EQ HI + 0 - EQ LO 10 R MIC 5 0 L LINE AUX PAN TRIM 0 +- EQ HI + 0 - EQ LO 10 R MIC 5 0 L LINE AUX PAN TRIM POWER PEAK 1234 PEAKPEAKPEAK 10 5 0 AUX RL PAN/ BAL 0 5 10 0 5 10 0000 5555 10101010 0 5 10 0 5 10 0 5 10101010 555 000 10 5 0 5/MONO6 MASTER 10 5 0 10 5 0 AUX RTN 7/MONO89/MONO1011/MONO12 MN12 LR + - 10 5 0 3 6 DC IN 12V - + STAND BYON L/MONO AUX RTN R AUX SEND LR STEREO OUT 3124 6 5 7 8 9 10 1213 14 15 1. DC IN jack DC IN 2. Power switch STANDBY 3. Aux return jacks AUX RTN 4. Aux send jack AUX SEND 5. Stereo out jacks STEREO OUT 6. High equalizer knobs 14 EQ HI 7. Low equalizer knobs 14 EQ LO 8. Aux level knob 18 AUX 9. Panpot Knobs 14 PAN 10. Input trim knobs 14 TRIM 11. Power LED POWER 12. Panpot / Balance knobs 58 PAN/BAL 13. LED level meter 14. Aux return knob AUX RTN 15. Phones knob PHONES 16. Input fader 112 112 17. Master fader MASTER 18. Input jacks 112 19. Headphone jack 16 17 11 1819 RadioFans.CN 收音机爱 好者资料库 MN-12/04 7 STEREO OUT RL ONSTANDBY DC IN 9V -+ PEAK 0 5 10 0 5 10 0 5 10 0 5 10 0 5 10 MN04 MASTER4321 PAN PAN PANPAN LINE MIC ALC ON MIC RL RL RLRL 123 4 56 7 8 9 10 11 12 1. Battery compartment 2. DC IN jack DC IN 3. Power switch STANDBY 4. Stereo out jacks STEREO OUT 5. Level selector switch 6. Power LED 7. Panpot knob 14 PAN 8. Peak LED PEAK 9. Input fader 14 14 10. Master fader MASTER 11. Input jacks 14 12. Headphone jack RadioFans.CN 收音机爱 好者资料库 8 MN-12/04 3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST MN-12 OVERALL EXPLODED VIEW & PARTS LIST No. PartsNo. Description 18212600000 PANEL, FRONT, MN-12 28216598000 SHIELD, PLATE, MN12 38274180000 PCB Assy, METER, MN-12 48270727003 ADAPTOR, AD-12A, USA/CND 8270727006 ADAPTOR, AD-12A, EUR 8270727007 ADAPTOR, AD-12A, UK 8270727010 ADAPTOR, AD-12A, JPN 58274179000 PCB Assy, MAIN, MN-12 68226198004 ROTARY, KNOB, (D), GRY 78226198003 ROTARY, KNOB(C), GRN 88226198002 ROTARY, KNOB(B), YEL 98226198001 ROTARY, KNOB(A), RED 10 8226159001 KNOB, FADER, WHT 11 8226159002 KNOB, FADER, RED 12 8221269000 PLATE, BOTTOM, MN12 13 8207010700 RUBBER, FOOT RadioFans.CN 收音机爱 好者资料库 MN-12/04 9 MN-04 OVERALL EXPLODED VIEW & PARTS LIST No. PartsNo. Description 18221262000 KNOB, SW, WHT 28212599000 PANEL, FRONT, MN-04 38274182000 PCB Assy, SELECTOR, MN-04 48216599000 SHIELD, PLATE, MN-04 58270728003 ADAPTOR, AD-9A, USA/CND 8270728006 ADAPTOR, AD-9A, EUR 8270728007 ADAPTOR, AD-9A, UK 8270728010 ADAPTOR, AD-9A, JPN 68226198002 ROTARY, KNOB(B), Y 78226159001 KNOB, FADER, WHT 88274181000 PCB Assy, MAIN, MN-04 98226159002 KNOB, FADER, RED 10 8216513000 SPONG, MN06 11 8212115001 BATTERY, COVER, MN06 12 8221268000 PLATE, BOTTOM, MN-04 13 8207010700 RUBBER, FOOT RadioFans.CN 收音机爱 好者资料库 10 MN-12/04 Ref. No.Part No.Description R114414 8230138203HT, CARBON, 1/4W, 20K, 5% R115415 8230138103HT, CARBON, 1/4W, 10K, 5% R116416 8230138242HT, CARBON, 1/4W, 2.4K, 5% R117417 8230138223HT, CARBON, 1/4W, 22K, 5% R118418 8230138223HT, CARBON, 1/4W, 22K, 5% R119419 8230138474HT, CARBON, 1/4W, 470K, 5% R120420 8230138102HT, CARBON, 1/4W, 1K, 5% R121421 8230138101HT, CARBON, 1/4W, 100, 5% R122422 8230138104HT, CARBON, 1/4W, 100K, 5% R123423 8230138273HT, CARBON, 1/4W, 27K, 5% R124424 8230138563HT, CARBON, 1/4W, 56K, 5% R151, 2518230138683HT, CARBON, 1/4W, 68K, 5% R152, 2528230138273HT, CARBON, 1/4W, 27K, 5% R153, 2538230138563HT, CARBON, 1/4W, 56K, 5% R154, 2548230138102HT, CARBON, 1/4W, 1K, 5% R155, 2558230138303HT, CARBON, 1/4W, 30K, 5% R156, 2568230138332HT, CARBON, 1/4W, 3.3K, 5% R3518230138203HT, CARBON, 1/4W, 20K, 5% R3528230138203HT, CARBON, 1/4W, 20K, 5% R3538230138203HT, CARBON, 1/4W, 20K, 5% R3548230138223HT, CARBON, 1/4W, 22K, 5% R3558230138102HT, CARBON, 1/4W, 1K, 5% R3568230138332HT, CARBON, 1/4W, 3.3K, 5% R451, 4528230138332HT, CARBON, 1/4W, 3.3K, 5% R453, 4548230138273HT, CARBON, 1/4W, 27K, 5% R455, 4568230138332HT, CARBON, 1/4W, 3.3K, 5% R457, 4588230138103HT, CARBON, 1/4W, 10K, 5% R459, 4608230138220HT, CARBON, 1/4W, 22, 5% R5018018230138103HT, CARBON, 1/4W, 10K, 5% R5028028230138203HT, CARBON, 1/4W, 20K, 5% R5038038230138103HT, CARBON, 1/4W, 10K, 5% R5048048230138203HT, CARBON, 1/4W, 20K, 5% R5058058230138473HT, CARBON, 1/4W, 47K, 5% R5068068230138473HT, CARBON, 1/4W, 47K, 5% R5078078230138473HT, CARBON, 1/4W, 47K, 5% R5088088230138473HT, CARBON, 1/4W, 47K, 5% R5098098230138203HT, CARBON, 1/4W, 20K, 5% R551, 5528230138153HT, CARBON, 1/4W, 15K, 5% R5538230138470HT, CARBON, 1/4W, 47, 5% R6518230138332HT, CARBON, 1/4W, 3.3K, 5% R652, 6538230138103HT, CARBON, 1/4W, 10K, 5% R654, 6558230138470HT, CARBON, 1/4W, 47, 5% R6568230138474HT, CARBON, 1/4W, 470K, 5% R6578230138473HT, CARBON, 1/4W, 47K, 5% R6588230138473HT, CARBON, 1/4W, 47K, 5% R901, 9028230138203HT, CARBON, 1/4W, 20K, 5% ICs Ref.No.PartNo.Description U101701 8236037200IC, ANALOG, PC4570H U102, 302 8236037200IC, ANALOG, PC4570H U151351 8236037200IC, ANALOG, PC4570H U4518236041300IC, ANALOG, NJM4556L U5518236038900IC, DIP, LEDDRIVER, IR2E27A U6028236032005IC, REGULATOR, NJM78M12FA TRANSISTORs Ref.No.PartNo.Description Q101401 8236408900TR, 2SD1858, QR, T Q102402 8234108800TR, 2SB1237, PQR, T Q151, 251 8236408900TR, 2SD1858, QR, T Q3518236408900TR, 2SD1858, QR, T Q6518234108800TR, 2SB1237, PQR, T DIODEs Ref.No.PartNo.Description D101401 8234104000OPT, V, LED, RED, RJ3-2034ADS D551, 561 8234109301OPT, LED, SEL1124R D552,