Service Manual
Model
MN-12/04
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.
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.
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 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
Read instructions - All the safety and operating instruc-
1.
tions should be read before the appliance is operated.
Retain instructions - The safety and operating instructions
2.
should be retained for future reference.
Heed warnings - All warnings on the appliance and in the
3.
operating instructions should be adhered to.
Follow instructions - All operating and use instructions
4.
should be followed.
Water and Moisture - The appliance should not be used
5.
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
6.
with a cart or stand that is recommended by the manufacturer.
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
7.
mounted to a wall or ceiling only as recommended by the
manufacturer.
Ventilation - The appliance should be situated so that its
8.
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.
2
Heat - The appliance should be situated away from heat
9.
sources such as radiators, heat registers, stoves, or other
appliances (including amplifiers) that produce heat.
Power Sources - The appliance should be connected to a
10.
power supply only of the type described in the operating
instructions or as marked on the appliance.
Grounding or Polarization - The precautions that should
11.
be taken so that the grounding or polarization means of
an appliance is not defeated.
Power Cord Protection - Power supply cords should be
12.
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 rec-
13.
ommended by the manufacturer.
Nonuse Periods - The power cord of the appliance should
14.
be unplugged from the outlet when left unused for a long
period of time.
Object and Liquid Entry - Care should be taken so that
15.
objects do not fall and liquids are not spilled into the enclosure through openings.
Damage requiring Service - The appliance should be ser-
16.
viced by qualified service personnel when:
The power supply cord or the plug has been damaged;
A.
or
Objects have fallen, or liquid has been spilled into the
B.
appliance; or
The appliance has been exposed to rain; or
C.
The appliance does not appear to operate normally or
D.
exhibits a marked changed in performance; or
The appliance has been dropped, or the enclosure
E.
damaged.
Servicing - The user should not attempt to service the ap-
17.
pliance beyond that described in the operating instructions. All other servicing should be referred to qualified
service personnel.
TABLE OF CONTENTS
MN-12/04
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)
4
6
8
15
* 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 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 kΩ 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
Impedance 8 kΩ or more
AUX RTN
Input level -10dBV
Impedance 8 kΩ or more
OUTPUT SECTION
STEREO OUT
Level -10dBV
Load Impedance 1kΩ
Frequency Response 20 ~ 20kHz ± 1.5dB ( INPUT 1~4 : -60dBV)
S/N 80 dB or more ( DIN AUDIO,INPUT 1~4 : -10dBV)
Distortion 0.01 % or less ( INPUT 1~8 : 1kHz / 0dBV , 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)
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 Ω load, INPUT : -10dBV, OUTPUT : 40mW )
Distortion 0.2 % or less ( 32 Ω load, 1kHz, OUTPUT : 40mW )
20 ~ 20kHz ±1dB ( INPUT 1~8 : -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)
0.05 % or less ( INPUT 1~4 : 1kHz/-50dBV , OUTPUT : 0dBV )
88 dB or more ( IHF-A, INPUT : -10dBV)
20 ~ 20 kHz ± 3dB ( 32 Ω load, INPUT : -10dBV, 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
4
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 kΩ or more
INPUT 2~4
Input level -10dBV
Impedance 8 kΩ or 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 Ω load, INPUT : -60dBV )
80 ~ 20 kHz +1-3dB ( 32 Ω load, INPUT : -10dBV )
Distortion 0.2 % or less ( 32 Ω load, 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
MN-12/04
* Specifications and appearance are subject to change without notice for product improvement.
5
MN-12/04
2. CONTROLS, INDICATORS & CONNECTORS
< MN-12 >
312 465
7
8
9
10
11
EQ HI
EQ LO
AUX
PAN
TRIM
+
DC IN
0
+-
+0-
5
10
0
R
L
MIC
LINE
10101010
5555
0000
POWER
0
EQ HI
+-
EQ LO
+0-
5
AUX
10
0
PAN
R
L
TRIM
MIC
LINE
PEAK
1234
0
EQ HI
+-
EQ LO
+0-
5
AUX
10
0
PAN
R
L
TRIM
MIC
LINE
PEAK PEAK PEAK
EQ HI
EQ LO
AUX
PAN
TRIM
0
+-
+0-
5
10
0
R
L
MIC
LINE
16
-
12V
STAND BY ON
AUX
PAN/
BAL
10
5
0
5/MONO 6
12
L/MONO
AUX RTNRAUX SEND
AUX
1050
PAN/
BAL
RL
10
555
5
000
0
7/MONO 8 9/MONO 10 11/MONO 12
AUX
1050
RL
10
5
0
1050
PAN/
BAL
RL
10
5
0
LR
STEREO OUT
AUX
1050
PAN/
BAL
RL
13
+
6
3
0
5
10
LR
-
AUX RTN
PHONES
1010 10 10
5
0
1050
1050
MN12
10
5
0
MASTER
14
15
17
18 19
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
]
]
6
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
]
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