Fostex MN-12 Manuel utilisateur

MN-12/04

MN-12

MN-04

Service Manual

Model

MiniMixer

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:

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 ÉVITER LES CHOCS ÉLECTRIQUES,

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 product's 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.”

The power supply cord or the plug has been damaged;

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.

10.

11.

12.

13.

14.

15.

16.

17.

MN-12/04

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

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.

MN-12/04

1. SPECIFICATIONS

MN-12

DEFINITION ( Specification Unit : 0 dBV = 1 Vrms)

Normal Fader Position

Master fader At 7~8 position

Condition AUX RTN : -20 dBV / 1 kHz, AUX RTN VR : Max

Adjust Master fader for -10 dBV at STEREO OUT.

Input fader At 7~8 position

Condition 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 -60dBV (MIC) ~ -10dBV (LINE)

Impedance 20 kΩor 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

Impedance 8 kΩor more

AUX RTN

Input level -10dBV

Impedance 8 kΩor more

OUTPUT SECTION

STEREO OUT

Level -10dBV

Load Impedance 1kΩ

Frequency Response 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 1kΩ

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 32Ω

Frequency Response 20 ~ 20 kHz ± 1.5dB ( 32 Ωload, INPUT : -10dBV, OUTPUT : 40mW )

20 ~ 20 kHz ± 3dB ( 32 Ωload, INPUT : -10dBV, OUTPUT : 40mW )

Distortion 0.2 % or less ( 32 Ωload, 1kHz, OUTPUT : 40mW )

GENERAL

Dimensions 356 (W) × 198 (D) × 45 (H) mm

Weight 1.3 kg

Power supply

USA/CND 120VAC, 60Hz

EUR/UK 230VAC, 50/60Hz

JPN 100VAC, 50/60Hz

MN-12/04

MN-04

DEFINITION ( Specification Unit : 0 dBV = 1 Vrms )

Normal Fader Position

Master fader At 7~8 position

Condition 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).

Input fader At 7~8 position

Condition INPUT: -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)

Impedance 20 kΩor more

INPUT 2~4

Input level -10dBV

Impedance 8 kΩor more

OUTPUT SECTION

STEREO OUT

Level -10dBV

Load Impedance 1kΩ

Frequency Response 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 32Ω

Frequency Response 80 ~ 20 kHz +1-3dB ( 32 Ωload, INPUT : -60dBV )

80 ~ 20 kHz +1-3dB ( 32 Ωload, INPUT : -10dBV )

Distortion 0.2 % or less ( 32 Ωload, 1kHz, 200 mW )

GENERAL

Dimensions 193 (W) × 130 (D) × 45 (H) mm

Weight 0.5 kg

Power supply

USA/CND 120VAC, 60Hz

EUR/UK 230VAC, 50/60Hz

JPN 100VAC, 50/60Hz

* Specifications and appearance are subject to change without notice for product improvement.

MN-12/04

2. CONTROLS, INDICATORS & CONNECTORS

< MN-12 >

PHONES

AUX

PAN/

BAL

AUX

PAN/

BAL

AUX

PAN/

BAL

EQ HI

EQ LO

MIC

LINE

AUX

PAN

TRIM

EQ HI

EQ LO

MIC

LINE

AUX

PAN

TRIM

EQ HI

EQ LO

MIC

LINE

AUX

PAN

TRIM

EQ HI

EQ LO

MIC

LINE

AUX

PAN

TRIM

POWER

PEAK

1234

PEAK PEAK PEAK

AUX

PAN/

BAL

0000

5555

10101010

1010 10 10

555

000

5/MONO 6 MASTER

AUX RTN

7/MONO 8 9/MONO 10 11/MONO 12

MN12

DC IN

12V

STAND BY ON

L/MONO

AUX RTN RAUX SEND LR

STEREO OUT

312 4

12 13

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 1~4 [EQ HI]

7. Low equalizer knobs 1~4 [EQ LO]

8. Aux level knob 1~8 [AUX]

9. Panpot Knobs 1~4 [PAN]

10. Input trim knobs 1~4 [TRIM]

11. Power LED [POWER]

12. Panpot / Balance knobs 5~8 [PAN/BAL]

13. LED level meter

14. Aux return knob [AUX RTN]

15. Phones knob [PHONES]

16. Input fader 1~12 [1~12]

17. Master fader [MASTER]

18. Input jacks 1~12

19. Headphone jack

16 17

18 19

MN-12/04

< MN-04 >

STEREO OUT

ONSTANDBY

DC IN

PEAK

MN04

MASTER

4321

PAN

PANPAN

LINE MIC

ALC ON

MIC

RLRL

1234

5 6

910

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 1~4 [PAN]

8. Peak LED [PEAK]

9. Input fader 1~4 [1~4]

10. Master fader [MASTER]

11. Input jacks 1~4

12. Headphone jack

MN-12/04

3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST

MN-12 OVERALL EXPLODED VIEW & PARTS LIST

No. PartsNo.

Description

1 8212600000

PANEL, FRONT, MN-12

2 8216598000

SHIELD, PLATE, MN12

3 8274180000

PCB Assy, METER, MN-12

4 8270727003

ADAPTOR, AD-12A, USA/CND

8270727006

ADAPTOR, AD-12A, EUR

8270727007

ADAPTOR, AD-12A, UK

8270727010

ADAPTOR, AD-12A, JPN

5 8274179000

PCB Assy, MAIN, MN-12

6 8226198004

ROTARY, KNOB, (D), GRY

7 8226198003

ROTARY, KNOB(C), GRN

8 8226198002

ROTARY, KNOB(B),YEL

9 8226198001

ROTARY, KNOB(A), RED

10 8226159001

KNOB, FADER, WHT

11 8226159002

KNOB, FADER, RED

12 8221269000

PLATE, BOTTOM, MN12

13 8207010700

RUBBER, FOOT

MN-12/04

MN-04 OVERALL EXPLODED VIEW & PARTS LIST

No. PartsNo.

Description

1 8221262000

KNOB, SW, WHT

2 8212599000

PANEL, FRONT, MN-04

3 8274182000

PCB Assy, SELECTOR, MN-04

4 8216599000

SHIELD, PLATE, MN-04

5 8270728003

ADAPTOR, AD-9A, USA/CND

8270728006

ADAPTOR, AD-9A, EUR

8270728007

ADAPTOR, AD-9A, UK

8270728010

ADAPTOR, AD-9A, JPN

6 8226198002

ROTARY, KNOB(B),Y

7 8226159001

KNOB, FADER, WHT

8 8274181000

PCB Assy, MAIN, MN-04

9 8226159002

KNOB, FADER, RED

10 8216513000

SPONG, MN06

11 8212115001

BATTERY, COVER, MN06

12 8221268000

PLATE, BOTTOM, MN-04

13 8207010700

RUBBER, FOOT

MN-12/04

Ref. No. Part No. Description

R114~414 8230138203 HT, CARBON, 1/4W, 20K, 5%

R115~415 8230138103 HT, CARBON, 1/4W, 10K, 5%

R116~416 8230138242 HT, CARBON, 1/4W, 2.4K, 5%

R117~417 8230138223 HT, CARBON, 1/4W, 22K, 5%

R118~418 8230138223 HT, CARBON, 1/4W, 22K, 5%

R119~419 8230138474 HT, CARBON, 1/4W, 470K, 5%

R120~420 8230138102 HT, CARBON, 1/4W, 1K, 5%

R121~421 8230138101 HT, CARBON, 1/4W, 100, 5%

R122~422 8230138104 HT, CARBON, 1/4W, 100K, 5%

R123~423 8230138273 HT, CARBON, 1/4W, 27K, 5%

R124~424 8230138563 HT, CARBON, 1/4W, 56K, 5%

R151, 251 8230138683 HT, CARBON, 1/4W, 68K, 5%

R152, 252 8230138273 HT, CARBON, 1/4W, 27K, 5%

R153, 253 8230138563 HT, CARBON, 1/4W, 56K, 5%

R154, 254 8230138102 HT, CARBON, 1/4W, 1K, 5%

R155, 255 8230138303 HT, CARBON, 1/4W, 30K, 5%

R156, 256 8230138332 HT, CARBON, 1/4W, 3.3K, 5%

R351 8230138203 HT, CARBON, 1/4W, 20K, 5%

R352 8230138203 HT, CARBON, 1/4W, 20K, 5%

R353 8230138203 HT, CARBON, 1/4W, 20K, 5%

R354 8230138223 HT, CARBON, 1/4W, 22K, 5%

R355 8230138102 HT, CARBON, 1/4W, 1K, 5%

R356 8230138332 HT, CARBON, 1/4W, 3.3K, 5%

R451, 452 8230138332 HT, CARBON, 1/4W, 3.3K, 5%

R453, 454 8230138273 HT, CARBON, 1/4W, 27K, 5%

R455, 456 8230138332 HT, CARBON, 1/4W, 3.3K, 5%

R457, 458 8230138103 HT, CARBON, 1/4W, 10K, 5%

R459, 460 8230138220 HT, CARBON, 1/4W, 22, 5%

R501~801 8230138103 HT, CARBON, 1/4W, 10K, 5%

R502~802 8230138203 HT, CARBON, 1/4W, 20K, 5%

R503~803 8230138103 HT, CARBON, 1/4W, 10K, 5%

R504~804 8230138203 HT, CARBON, 1/4W, 20K, 5%

R505~805 8230138473 HT, CARBON, 1/4W, 47K, 5%

R506~806 8230138473 HT, CARBON, 1/4W, 47K, 5%

R507~807 8230138473 HT, CARBON, 1/4W, 47K, 5%

R508~808 8230138473 HT, CARBON, 1/4W, 47K, 5%

R509~809 8230138203 HT, CARBON, 1/4W, 20K, 5%

R551, 552 8230138153 HT, CARBON, 1/4W, 15K, 5%

R553 8230138470 HT, CARBON, 1/4W, 47, 5%

R651 8230138332 HT, CARBON, 1/4W, 3.3K, 5%

R652, 653 8230138103 HT, CARBON, 1/4W, 10K, 5%

R654, 655 8230138470 HT, CARBON, 1/4W, 47, 5%

R656 8230138474 HT, CARBON, 1/4W, 470K, 5%

R657 8230138473 HT, CARBON, 1/4W, 47K, 5%

R658 8230138473 HT, CARBON, 1/4W, 47K, 5%

R901, 902 8230138203 HT, CARBON, 1/4W, 20K, 5%

ICs

Ref.No. PartNo. Description

U101~701 8236037200 IC, ANALOG, µPC4570H

U102, 302 8236037200 IC, ANALOG, µPC4570H

U151~351 8236037200 IC, ANALOG, µPC4570H

U451 8236041300 IC, ANALOG, NJM4556L

U551 8236038900 IC, DIP, LEDDRIVER, IR2E27A

U602 8236032005 IC, REGULATOR, NJM78M12FA

TRANSISTORs

Ref.No. PartNo. Description

Q101~401 8236408900 TR, 2SD1858, QR, T

Q102~402 8234108800 TR, 2SB1237, PQR, T

Q151, 251 8236408900 TR, 2SD1858, QR, T

Q351 8236408900 TR, 2SD1858, QR, T

Q651 8234108800 TR, 2SB1237, PQR, T

DIODEs

Ref.No. PartNo. Description

D101~401 8234104000 OPT, V, LED, RED, RJ3-2034ADS

D551, 561 8234109301 OPT, LED, SEL1124R

D552, 562 8234109301 OPT, LED, SEL1124R

D553, 563 8234109302 OPT, LED, SEL1324G

D554, 564 8234109302 OPT, LED, SEL1324G

D555, 565 8234109302 OPT, LED, SEL1324G

D652 8234017601 DIODE, 1SS133

D653 8234103900 OPT, V, LED, GRN, RT3-5034YGS

D654 8234017601 DIODE, 1SS133

D655 8234000700 DIODE, 1N4002

RESISTORs

Ref. No. Part No. Description

R101~401 8230138101 HT, CARBON, 1/4W, 100, 5%

R102~402 8230138104 HT, CARBON, 1/4W, 100K, 5%

R103~403 8230138224 HT, CARBON, 1/4W, 220K, 5%

R104~404 8230138470 HT, CARBON, 1/4W, 47, 5%

R105~405 8230138512 HT, CARBON, 1/4W, 5.1K, 5%

R106~406 8230138512 HT, CARBON, 1/4W, 5.1K, 5%

R107~407 8230138153 HT, CARBON, 1/4W, 15K, 5%

R108~408 8230138153 HT, CARBON, 1/4W, 15K, 5%

R109~409 8230138103 HT, CARBON, 1/4W, 10K, 5%

R110~410 8230138243 HT, CARBON, 1/4W, 24K, 5%

R111~411 8230138303 HT, CARBON, 1/4W, 30K, 5%

R112~412 8230138243 HT, CARBON, 1/4W, 24K, 5%

R113~413 8230138303 HT, CARBON, 1/4W, 30K, 5%

MN-12 PartsList

• MAIN / SELECTOR PCBs

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