MN-12/04 Service Manual Model MN-12 MN-04 Mini Mixer 1 MN-12/04 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. ATTENTION: POUR ÉVITER LES CHOCS ÉLECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU' AU FOND. 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 product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. "WARNING" "TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE." SAFETY INSTRUCTIONS 1. 2. 3. 4. 5. Read instructions - All the safety and operating instructions 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 manufacturer. 9. 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 receptacles, and the point where they exit from the appliance. Cleaning - The appliance should be cleaned only as recommended 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 enclosure through openings. Damage requiring Service - The appliance should be serviced by qualified service personnel when: A. The power supply cord or the plug has been damaged; or B. Objects have fallen, or liquid has been spilled into the appliance; or C. The appliance has been exposed to rain; or D. The appliance does not appear to operate normally or exhibits a marked changed in performance; or E. The appliance has been dropped, or the enclosure damaged. Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel. 10. 11. 12. 6. 13. 14. 15. 7. 8. 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 overturn. 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 ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings. 16. 17. 2 MN-12/04 TABLE OF CONTENTS 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. CONTROLS, INDICATORS AND CONNECTORS . . . . . . . . . . . . 6 3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST . . . . . . 8 4. CIRCUIT & BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . 15 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 Owner's 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 Owner's 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 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. 3 MN-12/04 1. SPECIFICATIONS MN-12 DEFINITION ( Specification Unit : 0 dBV = 1 Vrms) Normal Fader Position Master fader Condition Input fader Condition At 7~8 position AUX RTN : -20 dBV / 1 kHz, AUX RTN VR : Max Adjust Master fader for -10 dBV at STEREO OUT. At 7~8 position INPUT: -10 dBV / 1 kHz, PAN : L(R), TRIM : LINE, EQ GAIN : 0 Adjust Input fader for -10 dBV at STEREO OUT. INPUT SECTION INPUT 1~4 Input level Impedance EQ HI EQ LOW INPUT 5-6, 7-8, 9-10, 11-12 Input level Impedance AUX RTN Input level Impedance -60dBV (MIC) ~ -10dBV (LINE) 20 k or more ± 13dB ± 3dB ( -10dBV / 10 kHz ) ± 13dB ± 3dB ( -10dBV / 100 Hz ) -10dBV 8 k or more -10dBV 8 k or more OUTPUT SECTION STEREO OUT Level Load Impedance Frequency Response -10dBV 1k 20 ~ 20kHz ± 1.5dB ( INPUT 1~4 : -60dBV) 20 ~ 20kHz ±1dB ( INPUT 1~8 : -10dBV) S/N 80 dB or more ( DIN AUDIO,INPUT 1~4 : -10dBV) 81 dB or more ( IHF-A, INPUT 1~4 : -10dBV) 63 dB or more ( DIN AUDIO, INPUT 1~8 : -60dBV) 64 dB or more ( IHF-A, INPUT 1~8 : -60dBV) Distortion 0.01 % or less ( INPUT 1~8 : 1kHz / 0dBV , OUTPUT : 0dBV ) 0.05 % or less ( INPUT 1~4 : 1kHz/-50dBV , OUTPUT : 0dBV ) Crosstalk 60dB or more at 1kHz Click Noise (Power on / off) -20 dBVp-p or less (OUTPUT VR : MIN) Peak LED Indication 0 dBV ± 3dB AUX SEND Level -10dBV Load Impedance 1k Frequency Response 20 ~ 20kHz +1dB ( INPUT : -10dBV) S/N 86 dB or more ( DIN AUDIO,INPUT : -10dBV) 88 dB or more ( IHF-A, INPUT : -10dBV) Distortion 0.01 % or less ( INPUT : 1kHz / 0dBV , OUTPUT : 0dBV ) Crosstalk 60dB or more at 1kHz Click Noise (Power on / off) -20 dBVp-p or less (OUTPUT VR : MIN) PHONES Connector Stereo phone Level 40mW or more (Normal fader position) Load Impedance 32 Frequency Response 20 ~ 20 kHz ± 1.5dB ( 32 load, INPUT : -10dBV, OUTPUT : 40mW ) 20 ~ 20 kHz ± 3dB ( 32 load, INPUT : -10dBV, OUTPUT : 40mW ) Distortion 0.2 % or less ( 32 load, 1kHz, OUTPUT : 40mW ) GENERAL Dimensions Weight Power supply USA/CND EUR/UK JPN 4 356 (W) × 198 (D) × 45 (H) mm 1.3 kg 120VAC, 60Hz 230VAC, 50/60Hz 100VAC, 50/60Hz MN-12/04 MN-04 DEFINITION ( Specification Unit : 0 dBV = 1 Vrms ) Normal Fader Position Master fader Condition At 7~8 position INPUT 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). At 7~8 position INPUT: -10 dBV / 1 kHz, PAN : L(R), TRIM : LINE Adjust Input fader for -10 dBV at STEREO OUT. Input fader Condition INPUT SECTION INPUT 1 Input level Impedance INPUT 2~4 Input level Impedance -60dBV(MIC) / -50~-20dBV(ALC ON) / -10dBV(LINE) 20 k or more -10dBV 8 k or more OUTPUT SECTION STEREO OUT Level Load Impedance Frequency Response -10dBV 1k 20 ~ 20kHz ± 1.5dB (INPUT : -60dBV) 20 ~ 20kHz +1dB (INPUT : -10dBV) S/N 82 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) Distortion 0.25 % 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 ) Crosstalk 55dB or more at 1kHz Click Noise (Power on / off) -20 dBVp-p or less (OUTPUT VR : MIN) Peak LED Indication 0 dBV ± 3dB PHONES Level 1mW or more (Normal fader position) Load Impedance 32 Frequency Response 80 ~ 20 kHz +1-3dB ( 32 load, INPUT : -60dBV ) 80 ~ 20 kHz +1-3dB ( 32 load, INPUT : -10dBV ) Distortion 0.2 % or less ( 32 load, 1kHz, 200 mW ) Dimensions Weight Power supply USA/CND EUR/UK JPN 193 (W) × 130 (D) × 45 (H) mm 0.5 kg 120VAC, 60Hz 230VAC, 50/60Hz 100VAC, 50/60Hz GENERAL * Specifications and appearance are subject to change without notice for product improvement. 5 MN-12/04 2. CONTROLS, INDICATORS & CONNECTORS < MN-12 > 1 2 3 4 5 11 + POWER DC IN 12V STAND BY ON 12 L/MONO R AUX RTN AUX SEND L R STEREO OUT 13 6 7 8 9 10 EQ HI 0 EQ HI 0 EQ HI 0 EQ HI 0 + 6 EQ LO 0 + EQ LO 3 0 + EQ LO 0 + EQ LO 0 L + 0 5 10 R AUX 5 + AUX 5 + AUX 5 + AUX 5 + AUX 5 AUX 5 AUX 5 AUX 5 AUX RTN 5 14 15 0 PAN 10 PAN 0 10 PAN 0 10 PAN 0 10 PAN/ BAL 0 10 PAN/ BAL 0 10 PAN/ BAL 0 10 PAN/ BAL 0 10 PHONES 0 5 10 L TRIM R TRIM L R TRIM L R TRIM L R L R L R L R L R 0 10 LINE MIC LINE MIC LINE MIC LINE MIC MN12 PEAK 10 PEAK 10 PEAK 10 PEAK 10 10 10 10 10 10 10 10 10 10 5 5 5 5 5 5 5 5 5 5 5 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 3 4 5/MONO 6 7/MONO 8 9/MONO 10 11/MONO 12 MASTER 16 17 18 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. DC IN jack [DC IN] Power switch [STANDBY] Aux return jacks [AUX RTN] Aux send jack [AUX SEND] Stereo out jacks [STEREO OUT] High equalizer knobs 1~4 [EQ HI] Low equalizer knobs 1~4 [EQ LO] Aux level knob 1~8 [AUX] Panpot Knobs 1~4 [PAN] Input trim knobs 1~4 [TRIM] 11. 12. 13. 14. 15. 16. 17. 18. 19. 19 Power LED [POWER] Panpot / Balance knobs 5~8 [PAN/BAL] LED level meter Aux return knob [AUX RTN] Phones knob [PHONES] Input fader 1~12 [1~12] Master fader [MASTER] Input jacks 1~12 Headphone jack 6 MN-12/04 < MN-04 > 1 2 3 4 5 + STANDBY ON DC IN 9V MIC LINE MIC ALC ON 6 L R STEREO OUT MN04 PAN PAN PAN PAN R L R L R L R L PEAK 7 10 10 10 10 10 8 5 5 5 5 5 0 0 0 0 0 1 2 3 4 MASTER 9 11 10 12 1. 2. 3. 4. 5. 6. Battery compartment DC IN jack [DC IN] Power switch [STANDBY] Stereo out jacks [STEREO OUT] Level selector switch Power LED 7. 8. 9. 10. 11. 12. Panpot knob 1~4 [PAN] Peak LED [PEAK] Input fader 1~4 [1~4] Master fader [MASTER] Input jacks 1~4 Headphone jack 7 MN-12/04 3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST MN-12 OVERALL EXPLODED VIEW & PARTS LIST No. PartsNo. Description 1 2 3 4 8212600000 PANEL, FRONT, MN-12 8216598000 SHIELD, PLATE, MN12 8274180000 PCB Assy, METER, MN-12 8270727003 ADAPTOR, AD-12A, USA/CND 8270727006 ADAPTOR, AD-12A, EUR 8270727007 ADAPTOR, AD-12A, UK 8270727010 ADAPTOR, AD-12A, JPN 5 6 7 8 9 8274179000 PCB Assy, MAIN, MN-12 8226198004 ROTARY, KNOB, (D), GRY 8226198003 ROTARY, KNOB(C), GRN 8226198002 ROTARY, KNOB(B), YEL 8226198001 ROTARY, KNOB(A), RED 10 8226159001 KNOB, FADER, WHT 11 8226159002 KNOB, FADER, RED 12 8221269000 PLATE, BOTTOM, MN12 13 8207010700 RUBBER, FOOT 8 MN-12/04 MN-04 OVERALL EXPLODED VIEW & PARTS LIST No. PartsNo. Description 1 2 3 4 5 8221262000 KNOB, SW, WHT 8212599000 PANEL, FRONT, MN-04 8274182000 PCB Assy, SELECTOR, MN-04 8216599000 SHIELD, PLATE, MN-04 8270728003 ADAPTOR, AD-9A, USA/CND 8270728006 ADAPTOR, AD-9A, EUR 8270728007 ADAPTOR, AD-9A, UK 8270728010 ADAPTOR, AD-9A, JPN 6 7 8 9 8226198002 ROTARY, KNOB(B), Y 8226159001 KNOB, FADER, WHT 8274181000 PCB Assy, MAIN, MN-04 8226159002 KNOB, FADER, RED 10 8216513000 SPONG, MN06 11 8212115001 BATTERY, COVER, MN06 12 8221268000 PLATE, BOTTOM, MN-04 13 8207010700 RUBBER, FOOT 9 MN-12/04 MN-12 PartsList · MAIN / SELECTOR PCBs ICs Ref.No. PartNo. Description U101~701 8236037200 IC, ANALOG, µPC4570H U102, 302 8236037200 IC, ANALOG, µPC4570H U151~351 8236037200 IC, ANALOG, µPC4570H U451 U551 U602 8236041300 IC, ANALOG, NJM4556L 8236038900 IC, DIP, LEDDRIVER, IR2E27A 8236032005 IC, REGULATOR, NJM78M12FA Ref. No. Part No. Description R114~414 8230138203 HT, CARBON, 1/4W, 20K, 5% ...