Fostex MN-12 User manual

MN-12/04
1
MN-12
MN-04
Service Manual
Model
MiniMixer

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 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.”
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.

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
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
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.

4
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
5
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.

6
MN-12/04
2. CONTROLS, INDICATORS & CONNECTORS
< MN-12 >
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
PEAK PEAK PEAK
10
5
0
AUX
RL
PAN/
BAL
0
5
10
0
5
10
0000
5555
10101010
0
5
10
0
5
10
0
5
1010 10 10
555
000
10
5
0
5/MONO 6 MASTER
10
5
0
10
5
0
AUX RTN
7/MONO 8 9/MONO 10 11/MONO 12
MN12
LR
+
-
10
5
0
3
6
DC IN
12V
-
+
STAND BY ON
L/MONO
AUX RTN RAUX SEND LR STEREO OUT
312 4
6
5
7
8
9
10
12 13
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 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
11
18 19

MN-12/04
7
< MN-04 >
STEREO OUT
RL
ONSTANDBY
DC IN
9V
-
+
PEAK
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
MN04
MASTER
4321
PAN
PAN
PANPAN
LINE MIC ALC ON
MIC
RL
RL
RLRL
1234
5 6
78
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

8
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
9
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

10
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

MN-12/04
11
Ref. No. Part No. Description
C501~801 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C502~802 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C503~803 8232050101 CER, 50V, 100PF, 5%, SL
C551 8232143107 ALU, 16V, 100µF, 20%, SME-VB
C552, 553 8232144475 ALU, 25V, 4.7µF, 20%, SME-VB
C554, 555 8232144475 ALU, 25V, 4.7µF, 20%, SME-VB
C651 8232143477 ALU, 16V, 470µF, 20%, SME-VB
C652, 657 8232143477 ALU, 16V, 470µF, 20%, SME-VB
C653, 658 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C654, 659 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C655, 660 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C662 8232144475 ALU, 25V, 4.7µF, 20%, SME-VB
C663 8232143477 ALU, 16V, 470µF, 20%, SME-VB
C901, 902 8232144226 ALU, 25V, 22µF, 20%, SME-VB
MISCELLANEOUS
Ref.No. PartNo. Description
CN501 8745503006 CONN, XH, 6P
J101~401 8245330003 CONN, PHONE,YKB21-5011
J151~451 8245339013 CONN, PH0NES,YKB21-5009
J501~801 8245330003 CONN, PHONE,YKB21-5011
J502~802 8245330003 CONN, PHONE,YKB21-5011
J603 8245258000 CONN, PLJACK, DC-INLET
J901, 902 8245330003 CONN, PHONE,YKB21-5011
S651 8253467000 SW, SS010-P022MAM-PA9
Ref. No. Part No. Description
VR101~401 8240241000 POT, PI, RT09, 20KC, RK09K113
VR102~402 8240245000 POT, PI, SL030, 20KAA, RS30H11
VR103~403 8240243000 POT, PI, RT09, 50KB, RK09K113
VR104~404 8240243000 POT, PI, RT09, 50KB, RK09K113
VR105~405 8240243000 POT, PI, RT09, 50KB, RK09K113
VR106~406 8240244000 POT, PI, RT09, 50KA, RK09K113
VR151 8240274004 POT, PI, SL30, 20KAA, RS30H121
VR451 8240286010 VR, RK09K12C-L25, 20KAA
VR501~801 8240274004 POT, PI, SL30, 20KAA, RS30H121
VR502~802 8240243000 POT, PI, RT09, 50KB, RK09K113
VR503~803 8240244000 POT, PI, RT09, 50KA, RK09K113
VR901 8240286010 VR, RK09K12C-L25, 20KAA
CAPACITORs
ALU = Electrolytic
CER = Ceramic type
PES = Mylar type
Ref. No. Part No. Description
C101~401 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C102~402 8232050100 CER, 50V, 10PF, +-.5PF, SL
C104~403 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C105~405 8232050220 CER, 50V, 22PF, 5%, SL
C106~406 8232901332 PES, 50V, .0033µF, 5%, AMZV
C107~407 8232050100 CER, 50V, 10PF, +-.5PF, SL
C108~408 8232901103 PES, 50V, 0.01µF, 5%, AMZV
C109~409 8232901103 PES, 50V, 0.01µF, 5%, AMZV
C110~410 8232146105 ALU, 50V, 1µF, 20%, SME-VB
C111~411 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C112~412 8232050101 CER, 50V, 100PF, 5%, SL
C113~413 8232050101 CER, 50V, 100PF, 5%, SL
C114~414 8232143476 ALU, 16V, 47µF, 20%, SME-VB
C115~415 8232050100 CER, 50V, 10PF, +-.5PF, SL
C116~416 8232050101 CER, 50V, 100PF, 5%, SL
C151, 251 8232050100 CER, 50V, 10PF, +-.5PF, SL
C152, 252 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C153, 253 8232050101 CER, 50V, 100PF, 5%, SL
C154, 254 8232050101 CER, 50V, 100PF, 5%, SL
C351 8232050100 CER, 50V, 10PF, +-.5PF, SL
C352 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C353, 354 8232050101 CER, 50V, 100PF, 5%, SL
C451, 452 8232143477 ALU, 16V, 470µF, 20%, SME-VB
C453, 454 8232050101 CER, 50V, 100PF, 5%, SL
C455, 456 8232050220 CER, 50V, 22PF, 5%, SL

12
MN-12/04
Ref.No. PartNo. Description
R506, 606 8230138102 HT, CARBON, 1/4W, 1K, 5%
R507, 607 8230138220 HT, CARBON, 1/4W, 22, 5%
R508, 608 8230138203 HT, CARBON, 1/4W, 20K, 5%
R701 8230138153 HT, CARBON, 1/4W, 15K, 5%
R702 8230138473 HT, CARBON, 1/4W, 47K, 5%
R703, 704 8230138473 HT, CARBON, 1/4W, 47K, 5%
R705 8230138105 HT, CARBON, 1/4W, 1M, 5%
R706 8230138222 HT, CARBON, 1/4W, 2.2K, 5%
R801 8230138222 HT, CARBON, 1/4W, 2.2K, 5%
R802 8230138203 HT, CARBON, 1/4W, 20K, 5%
R803, 804 8230138222 HT, CARBON, 1/4W, 2.2K, 5%
R805, 806 8230138203 HT, CARBON, 1/4W, 20K, 5%
R807, 808 8230138680 HT, CARBON, 1/4W, 68, 5%
R809 8230138105 HT, CARBON, 1/4W, 1M, 5%
R810, 811 8230138473 HT, CARBON, 1/4W, 47K, 5%
R812 8230138271 HT, CARBON, 1/4W, 270, 5%
VR101~501 8240274003 POT, PI, SL30, 20KA, RS30H111
VR102~401 8240243000 POT, PI, RT09, 50KB, RK09K113
CAPACITORs
ALU = Electrolytic
CER = Ceramic type
Ref. No. Part No. Description
C101~401 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C102 8232143107 ALU, 16V, 100µF, 20%, SME-VB
C104 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C105 8232146474 ALU, 50V, 0.47µF, 20%, SME-VB
C106 8232050101 CER, 50V, 100PF, 5%, SL
C107 8232146474 ALU, 50V, 0.47µF, 20%, SME-VB
C501, 601 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C502, 602 8232050100 CER, 50V, 10PF, ±.5PF, SL
C503, 603 8232050100 CER, 50V, 10PF, ±.5PF, SL
C504, 604 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C505, 605 8232143107 ALU, 16V, 100µF, 20%, SME-VB
C506, 606 8232050101 CER, 50V, 100PF, 5%, SL
C507, 607 8232050101 CER, 50V, 100PF, 5%, SL
C701 8232146474 ALU, 50V, 0.47µF, 20%, SME-VB
C801 8232143477 ALU, 16V, 470µF, 20%, SME-VB
C802, 803 8232143477 ALU, 16V, 470µF, 20%, SME-VB
C804 8232144226 ALU, 25V, 22µF, 20%, SME-VB
C805 8232143477 ALU, 16V, 470µF, 20%, SME-VB
C806 8232143477 ALU, 16V, 470µF, 20%, SME-VB
MISCELLANEOUS
Ref.No. PartNo. Description
CN101 8745503006 CONN, XH, 6P
CN801 8245258000 CONN, PLJACK, DC-INLET
J101~401 8245339012 CONN, PHONE,YKB21-5011
J501, 601 8245339013 CONN, PH0NES,YKB21-5009
J602 8245339013 CONN, PH0NES,YKB21-5009
S101 8253464000 SW, SLIDE, SSSF3-2
S801 8253467000 SW, SS010-P022MAM-PA9
W101 8277475013 CORDASSY, SCN-XH, 6P, 130
W801 8277476020 CORD, M3-SIN*200, BLK
W802 8277476015 CORD, 1P*150, BLK
ICs
Ref.No. PartNo. Description
U101 8236046100 IC, µPC4570C
U501 8236046100 IC, µPC4570C
U502 8236046200 IC, NJM4556AD
U801 8236046100 IC, µPC4570C
TRANSISTORs
Ref.No. PartNo. Description
Q101, 102 8236408900 TR, 2SD1858, QR, T
Q103 8234108800 TR, 2SB1237, PQR, T
Q501, 601 8236408900 TR, 2SD1858, QR, T
Q701 8236408900 TR, 2SD1858, QR, T
Q702 8234108800 TR, 2SB1237, PQR, T
Q801 8236408900 TR, 2SD1858, QR, T
Q802 8234108800 TR, 2SB1237, PQR, T
Q803 8236408900 TR, 2SD1858, QR, T
DIODEs
Ref.No. PartNo. Description
D101, 102 8234500700 D, HT, 1SS136
D103 8234109200 LED, SML1216W
D104 8234500700 D, HT, 1SS136
D701, 702 8234500700 D, HT, 1SS136
D703 8234104000 OPT, V, LED, RED, RJ3-2034ADS
D802 8234103900 OPT, V, LED, GRN, RT3-5034YGS
D803, 804 8234500700 D, HT, 1SS136
RESISTORs
Ref. No. Part No. Description
R101 8230138222 HT, CARBON, 1/4W, 2.2K, 5%
R102 8230138473 HT, CARBON, 1/4W, 47K, 5%
R103 8230138102 HT, CARBON, 1/4W, 1K, 5%
R105 8230138334 HT, CARBON, 1/4W, 330K, 5%
R107~407 8230138103 HT, CARBON, 1/4W, 10K, 5%
R108~408 8230138203 HT, CARBON, 1/4W, 20K, 5%
R109~409 8230138103 HT, CARBON, 1/4W, 10K, 5%
R110~410 8230138203 HT, CARBON, 1/4W, 20K, 5%
R111 8230138222 HT, CARBON, 1/4W, 2.2K, 5%
R112 8230138103 HT, CARBON, 1/4W, 10K, 5%
R113 8230138102 HT, CARBON, 1/4W, 1K, 5%
R114 8230138222 HT, CARBON, 1/4W, 2.2K, 5%
R115 8230138103 HT, CARBON, 1/4W, 10K, 5%
R116 8230138222 HT, CARBON, 1/4W, 2.2K, 5%
R117 8230138473 HT, CARBON, 1/4W, 47K, 5%
R118 8230138104 HT, CARBON, 1/4W, 100K, 5%
R119 8230138222 HT, CARBON, 1/4W, 2.2K, 5%
R120 8230138473 HT, CARBON, 1/4W, 47K, 5%
R121 8230138153 HT, CARBON, 1/4W, 15K, 5%
R122 8230138222 HT, CARBON, 1/4W, 2.2K, 5%
R123 8230138104 HT, CARBON, 1/4W, 100K, 5%
R501, 601 8230138683 HT, CARBON, 1/4W, 68K, 5%
R502, 602 8230138273 HT, CARBON, 1/4W, 27K, 5%
R503, 603 8230138563 HT, CARBON, 1/4W, 56K, 5%
R504, 604 8230138203 HT, CARBON, 1/4W, 20K, 5%
R505, 605 8230138102 HT, CARBON, 1/4W, 1K, 5%
MN-04 Parts List
• MAIN / SELECTOR PCBs

MN-12/04
13
MN-12 MAIN/METER PCBs PATTERN DRAWING
E
R107
R106
C207 R651
R214
R305
R114
R109
D653
VR103
C108 C208 C209
D652
C105
R209
R108 R106
C106 C107
R208
R307
R207
C213 C205
C655
C660
U201
R206
VR104 VR204
VR203
VR304
R205
C206
C113
C109
PCB#5238-10A
R118
R120
R117
R119
Q102
Q201
C211
E
B
B
C202
R203
R221 C212
R201
EB E
E
B
Q101
C111
VR101
R115 R104
R122 R216
R215
C114 C210
R116
R113
R212
R213
R112
R111 R110
R210
R211
R312
R313
R218 R202
R222
R204
R319
R316
R315
Q301
Q302
R317
R220
R219
R217
Q202
EB
D201
VR201
VR205
VR105
C102
C112
C101 C201
C214 C310
R103
R121 R102
D101
J101
C110 U101
VR102
R101
R123
C115
C116
C104
R124
U102
VR202
R223
C215
C216
C204
R224
J201 J301 J401
B
R318
C314 EB
R322 R419
R418
Q402
R417
C410 C414
C302
C312
C301
R303
R321 R302 C402
C412
R403
R421
R402
R301
U301 U302
VR302
R323
C315
R401
C316
C304
R324
C416
C404
VR402
R423
C415
R424
R310
R311
VR305
VR301
VR306
R412
R413
R410
R411
VR405
VR301
VR406
C311
D301
R320
EB
R304 R416
R415
Q401
C411
D401
R420 R404
R422
J501 J502 J601 J602 J701 J702 J801 J802 J451
U151
U701
R251
R151 R452
R459
R457
R458
R455
R451
C456
C453
C455
C451
C452
R454 U451 C454
R153
C151
C253
C153
C154
C803
C703
R508
R505
R507
R152
R456
R453
R460
R808
R708
R705 R706 R707 R807
VR601
C659
C501
C502 C601 C602
C654
C701 C702 C801 C802C658
C653
C401
W802 R506
C503
VR701 VR801
VR151
R308
R306
C306
C307
R314
R502R501
R605
R608
R607
R606
R503 R504
R509
R602R601
R603 R604
R609
VR501
VR502 VR602
VR503 VR603
R414
C603
U501
R309
C407
R405
C308 C309
C313
C406
R406
R409
R408
C413
J603
U602
U601
U351
C651
C652
C663
C657
C662
R655
R654
R653
R656 R657 R354
R351
R353
C354
R355
C352
C353
C351
C152
C554
C551
C555
R154 R155 R255
J351 J151 J251
R352
R658
R356
R156
Q651
J901
Q351 Q151
J902
D655
D654
R652
S651
13
U401
C409 C408
R709
R407
C305 C405
VR303 VR403
VR494
E
EE
B
BB
C553
C552
C252
Q251
R254
C902
R256
R553
U551
D561
R551
D551
D552
D553
D554
D555
D562
D563
D564
D565
PCB#5238-10B
R552
CN501
W501 1
1
EB
U251
C901
R252
C254
R901
R809
C251 R253
R902
R702R701
R805 R806
R802R801
R803 R804
VR802
VR803 VR901
VR451
VR106 VR206
R703 R704
VR702
VR703
W801

14 MN-12/04
MN-04 MAIN/SELECTOR PCBs PATTERN DRAWING

MN-12/04
15
MN-12 CIRCUIT DIAGRAM
4. CIRCUIT & BLOCK DIAGRAMS
C151
10p
R151
68k
PAN
C107
10p
1
3
2
4
5
VR103
50kB
C106
.0033uF
C105
22p
1
32
45
VR105
50kB
R110
24k R111
30k
R113
30k
R112
24k
R114
20k
1
32
45 VR106
50kA
R106
5.1k
C113
100p
2
3
8
4
1
U201A
4570
+VCC
EQ.H
TRIM
C104
22uF
R104
47
C115
10p
C114
47uF
R121
100
R122
100k
3
1
2
45
VR101
20kC
R105
5.1k
C116
100p
2
3
8
4
1
U101A
4570
+VCC
-VCC
1
3
2
VR102
20kA
R123
15k
R124
56k
-60~-10dBV
CH1
INPUT 2
3
1
J101
C101
22uF
R101
100
C102
10p
R103
220k
R102
100k C112
100p
5
6 7
U101B
4570
R120
1k
R118
22k
R119
470k
D101
PEAK
C202
10p
R117
22k
+VCC
Q102
B1237
INPUT LEVEL
R107
15k
C110
1u
C111
10uF
C215
10p
R115
10k
R116
2.4k
-VCC
Q101
D1858 EQ.L
AUX
R109
10k
C108
.01uF C109
.01uF
R108
15k
3 1
2
4
5
VR104
50kB
C205
22p
-VCC
R251
68k
C253
100p
C153
100p
2
3
8
4
1
U151A
4570
6
5 7
U151B
4570
+VCC
-VCC
MASTER LEVEL
C152
22uF
R154
1k
C252
22uF
R254
1k
C251
10p
C154
100p
6
5 7
U251B
4570
2
3
8
4
1
U251A
4570
+VCC
-VCC
1
3
2
VR151A
20kAA
4
6
5
VR151B
20kAA
R152
15k
R153
56k
R253
56k
R252
15k
-10dBV
MASTER OUT
L
2
3
1
J151
2
3
1
J251
R156
3.3k
Q151
D1858
-10dBV
R
AUX
SEND
R355
1k 2
3
1
J351
R256
3.3k
R356
3.3k
Q351
D1858
Q251
D1858
R354
22k
C352
22uF
C351
10p
R353
20k
R352
20k
C254
100p
C354
100p 6
5 7
U351B
4570
R351
20k
C353
100p
2
3
8
4
1
U351A
4570
+VCC
-VCC
PAN
AUX
1
3
2
4
5
VR203
50kB
3 1
2
4
5
VR204
50kB
C207
10p
C208
.01uF C209
.01uF
R209
10k
R208
15k
C206
.0033uF 1
32
45
VR205
50kB
R211
30k
R213
30k
R212
24k
R210
24k
R214
20k
1
32
45
VR206
50kA
R206
5.1k
C213
100p
6
5 7
U201B
4570
INPUT LEVEL
EQ.H
TRIM
C204
22uF
R207
15k
C211
10uF
R204
47
C214
47uF
R221
100
R222
100k
3
1
2
45
VR201
20kC
R205
5.1k
R215
10k
C216
100p
2
3 8
4
1
U102A
4570
+VCC
-VCC
1
3
2
VR202
20kA
R224
56k
R223
15k
-60~-10dBV
CH2
R220
1k
R218
22k
2
3
1
J201
C201
22uF
R201
100
R202
100k
R203
220k
R217
22k
C212
100p
5
6 7
U102B
4570
+VCC
Q202
B1237
CH3
-60~-10dBV
R219
470k
D201
PEAK
2
3
1
J301
R301
100
C302
10p
R303
220k
R302
100k
C301
22uF
C312
100p
5
6 7
U301B
4570
EQ.H
TRIM
C210
1u
C304
22uF
C315
10p
R304
47
C314
47uF
R321
100
R322
100k
3
1
2
45
VR301
20kC
R305
5.1k
R216
2.4k
C316
100p
2
3
8
4
1
U301A
4570
+VCC
-VCC
Q201
D1858
1
3
2
VR302
20kA R323
15k
R324
56k
EQ.L
PAN
1
3
2
4
5
VR303
50kB
C307
10p
C306
.0033uF
C305
22p
R311
30k
R313
30k
R312
24k
R310
24k
1
32
45
VR305
50kB
R314
20k
1
32
45
VR306
50kA
R306
5.1k
C313
100p
2
3
8
4
1
U401A
4570
+VCC
-10dBV
-10dBV
(MONO)
CH5 L
CH6 R
STEREO
INPUT INPUT LEVEL
2
3
1
J501
2
3
1
J502
C501
22uF
1
3
2
VR501A
20kAA
C502
22uF
4
6
5
VR501B
20kAA
PAN
AUX
1
3
2
45
VR502
50kB
R503
10k
1
3
2
45
VR503
50kA
R501
10K R502 20k
R504
20k
R505
47k
R506
47k
R507
47k
R508 47k
R509
20k
C503
100p
2
3
8
4
1
U501A
4570
+VCC
-VCC
BAR GRAPH
5
A
1
4
A
2
3
A
3
2
A
4
1
A
5
1
B
6
2
B
7
G
N
D
8
3
B
9
4
B
1
0
5
B
1
1
I
N
B
1
2
O
U
T
B
1
3
I
N
A
1
4
O
U
T
A
1
5
V
C
C
1
6
U551
IR2E27
D551 D553
D554
D555
R553
47
PHONES
C555
4.7uF R255
33k
C554
4.7uF R155
33k
R451
3.3k
R455
3.3k
2
1
3
4
5
6
W501
1
2
3
4
5
6
CN501
C453
100p
-10dBV
HEAD
PHONE
32ohm
R459
22
R457
10k
2
3
1
J451
C451
470uF
C455
22p
2
3
8
4
1
U451A
4556
+VCC
-VCC
R453
27k
R460
22
R458
10k
C452
470uF
C456
22p
6
5 7
U451B
4556
AGND
R454
27k
R452
3.3k
C551
100uF
C553
4.7uF
R456
3.3k
2
1
4
35
67 VR451
20kAA
C552
4.7uF
C454
100p
-VCC
+
6
d
B
+
3
d
B0
d
B
-
5
d
B
-
1
0
d
B
D561
D562
D563
D564
D565
R551
15k R552
15k
PAN
AUX
1
3
2
45
VR602
50kB
R603
10k
1
3
2
45
VR603
50kA
R601
10K R602 20k
R604
20k
R605
47k
R606
47k
R607
47k
R608
47k
R609
20k
C603
100p
6
5 7
U501B
4570
-10dBV
-10dBV
CH7 L
CH8 R
(MONO)
INPUT LEVEL
2
3
1
J601
2
3
1
J602
C601
22uF
1
3
2
VR601A
20kAA
4
6
5
VR601B
20kAA
C602
22uF
EQ.L
AUX
3 1
2
4
5
VR304
50kB
R309
10k
C308
.01uF
R308
15k
C309
.01uF
C405
22p
-VCC
INPUT LEVEL
R307
15k
C310
1u
C311
10uF
R316
2.4k
R315
10k
-VCC
-VCC
Q301
D1858
R320
1k
D301
PEAK R319
470k
R318
22k
R317
22k
+VCC
Q302
B1237
CH4
-60~-10dBV
R418
22k
2
3
1
J401
R401
100 C401
22uF
R402
100k
C402
10p
R403
220k
R417
22k
C412
100p
5
6 7
U302B
4570
+VCC
Q402
B1237
INPUT LEVEL
EQ.H
TRIM
R407
15k
C404
22uF
R404
47
C411
10uF
C414
47uF
C415
10p
R421
100
R422
100k
3
1
2
45
VR401
20kC
R405
5.1k
R415
10k
C416
100p
2
3
8
4
1
U302A
4570
+VCC
-VCC
1
3
2
VR402
20kA R423
15k
R424
56k
PAN
AUX
1
3
2
4
5
VR403
50kB
3 1
2
4
5
VR404
50kB
C406
.0033uF
C407
10p
R409
10k
C409
.01uF
C408
.01uF
R408
15k
R410
24k R411
30k
R413
30k
R412
24k 1
32
45
VR405
50kB
R414
20k
1
32
45
VR406
50kA
R406
5.1k
C413
100p
6
5 7
U401B
4570
-10dBV
-10dBV
CH9 L
CH10 R
(MONO)
INPUT LEVEL
C701
22uF
1
3
2
VR701A
20kAA
C702
22uF
4
6
5
VR701B
20kAA
2
3
1
J701
2
3
1
J702
PAN
AUX
1
3
2
45
VR702
50kB
1
3
2
45
VR703
50kA
R701
10K
R703
10k
R702
20k
R704
20k
R705
47k
R706
47k
R707
47k
R708 47k
R709
20k
C703
100p
2
3
8
4
1
U701A
4570
+VCC
DC IN
(12V 600mA)
POWER SW
1
3
2
J603
2 1
3
S651A
5 4
6
S651B
1
W801
1
W802
D652
R651
3.3k
R652
10k C652
470uF
C653
22uF
C654
22uFC655
22uF
C658
22uF C660
22uF
C659
22uF
R653
10k
C651
470uF
6
5 7
U601B
4558
C657
470uF
D653
IN
3 OUT 1
G
2
U602
78M12
2
3 8
4
1
U601A
4570
R654
47
R655
47
+VCC
-VCC
AGND
D655
R657
47k
R658
47k C663
470uF
D654
R656
470k
C662
4.7uF
Q651
B1237
AGND
PAN
AUX
1
3
2
45
VR802
50kB
1
3
2
45
VR803
50kA
R803
10k
R801
10K R802
20k
R804
20k
R805
47k
R806
47k
R807
47k
R808
47k
R809
20k
C803
100p
6
5 7
U701B
4570
-VCC
-10dBV
-10dBV
CH11 L
CH12 R
(MONO)
INPUT LEVEL
C801
22uF
C802
22uF
1
3
2
VR801A
20kAA
4
6
5
VR801B
20kAA
2
3
1
J801
2
3
1
J802
EQ.L
R901
20k
R902
20k
C410
1u
2
1
4
35
67 VR901
20kAA
R416
2.4k
-VCC
Q401
D1858
-20dBV
-20dBV
AUX RTN
L
R
R420
1k
D401
PEAK R419
470k
C901
22uF
C902
22uF
2
3
1
J901
2
3
1
J902
AGND
AUX RTN
1SR139-400

16 MN-12/04
MN-04 CIRCUIT DIAGRAM
PCB.523720A
C502
10pF C503 10pF
CH1
INPUT
-60~-10dBv
2
3
1
J101 C101
22uF
C102
100uF
R104
0
R102
47k C106
100pF
R101
2.2k
R103
1k
INPUT LEVEL
C104
22uF
2
3
8
4
1
U101A
4570
C103
0
1
3
2
VR101
20kA
+B
-B
R105
330k
PAN
1
3
2
45
VR102
50kB
C501
22uF
C506
100pF
R107
10k R108
20k
R109
10k R110
20k
MASTER LEVEL
1
3
2
VR501A
20kAA
2
3
8
4
1
U501A
4570
C507
100pF
R501
68k
R503
56k
R502
27k 2
3
8
4
1
U502A
4556
+B +B
-B
-B
C504
22uF
R506
1k
R505
1k Q501
D1858
R504
20k
MASTER OUT
L
-10dBv
2
3
1
J501
R
-10dBv-10dBv
2
3
1
J601
C604
22uF
R606
1k
R605
1k Q601 D1858
R604
20k
4
6
5
VR501B
20kAA 6
5 7
U502B
4556
6
5 7
U501B
4570
C602
10pF C603
10pF
C607
100pF
R601
68k R602
27k
R603
56k
1
3 24
5
S101A C601
22uF
C606
100pF
D101
1SS136
R111
2.2k
2
1
3
4
5
6
W101
1
2
3
4
5
6
CN101
C105
0.47uF
+B
AGND
R114
2.2k
R113
1k
Q102
D1858 Q101
D1858
D104
1SS136
R112
10k
+B
AGND
D102
1SS136
R117
47k
R115
10k
6
5 7
U101B
4570
R123
100k
R116
2.2k
C107
0.47uF
+B
AGND
AGND
PCB.523720B
R119
2.2k R122
2.2k
R120
47k
Q103
B1237
R118
100k
R121
15k
1
W102
1
W202
-B
1
0
87 9
6
S101B
1
2
3
D103
SML1216W
R705
1M
R702
47k
C701
0.47uF
R703
47k
R704
47k
D703
PEAK
Q702
B1237
Q701
D1858
+B R507
22
R607
22
C505
100uF
C605
100uF
D702
1SS136
D701 1SS136
R508 20k
R608 20k
PHONES OUT
2
3
1
J602
D804
1SS136
Q802
B1237
AGND
R807
68 R810
47k
R809
1M
C802
470uF D803
1SS136
2
3
8
4
1
U801A
4570
R802
20k R805
20k
+B
R706
2.2k
D802
POWER
Q803
D1858
R801
2.2k
1 2
3
7S801A
4 5
6
8
S801B
-B
AGND
PAN
PAN
1
3
2
45
VR202
50kB
1
3
2
CN801
DCIN
R207
10k
R209
10k
R307
10k
R208
20k
R210
20k
R308
20k
INPUT LEVEL
1
3
2
VR201
20kA
C201
22uF
CH2
-10dBv
2
3
1 J201
CH3
-10dBv
2
3
1 J301
2
3
1 J401
C301
22uF
C401
22uF
INPUT LEVEL
INPUT LEVEL
1
3
2
VR301
20kA
PAN
1
3
2
45
VR302
50kB
1
3
2
45
VR402
50kB
1
CN802+
PIN A
1
CN802-
PIN A
R309
10k
R407
10k
R310
20k
R408
20k
C806
470uF
C801
470uF
Q801
D1858
R812
270
AGND R808
68 C804
22uF
R804
2.2k
C803
470uF
R803
2.2k
6
5
7
U801B
4570
R806
20k -B
AGND R811
47k
C805
470uF
1
W801
SIN-3M
1
W802
SIN-L150
AGND
R409
10k R410
20k
1
3
2
VR401
20kA
AGND
CH4
-10dBv
R701
15k

MN-12/04
17
MN-12 BLOCK DIAGRAM

18 MN-12/04
MN-04 BLOCK DIAGRAM
PEAK LED
MASTER
L
R
STEREO OUT
-10dBV
PHONES
STEREO BUSS
LR
PAN
PAN
PAN
PAN
INPUT LEVEL
INPUT LEVEL
INPUT LEVEL
INPUT LEVEL
ALC
CH1
CH2
CH3
CH4
-10dBV
-60dBV
-10dBV
-10dBV
-10dBV
COMP

MN-12/04
19

20
MN-12/04
FOSTEX CORPORATION 3-2-35 Musashino, Akishima, Tokyo, Japan 196-0021
FOSTEX CORPORATION OF AMERICA 15431 Blackburn Ave., Norwalk, CA 90650, U.S.A. © PRINTED IN JAPAN AUG 1998 8288773000