Page 1
VM04 VM04
23
SAFETY INSTRUCTIONS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN 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 MOISTURE.
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.
1. Read instructions - All the safety and operating instructions
should be read before the appliance is operated.
2. Retain instructions - The safety and operating instructions
should be retained for future reference.
3. Heed warnings - All warnings on the appliance and in the
operating instructions should be adhered to.
4. Follow instructions - All operating and use instructions
should be followed.
5. 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.
6. Carts and Stands - The appliance should be used only 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.
7. Wall or Ceiling Mounting - The appliance should be mounted
to a wall or ceiling only as recommended by the manufac-
turer.
8. Ventilation - The appliance should be situated so that its lo-
cation or position does not interfere with its proper ventila-
tion. For example, the appliance should not be situated on a
bed, sofa, rug, or similar surface that may block the ventila-
tion 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.9. Heat - The appliance should be situated away from heat
sources such as radiators, heat registers, stoves, or other ap-
pliances (including amplifiers) that produce heat.
10. Power Sources - The appliance should be connected to a
power supply only of the type described in the operating in-
structions or as marked on the appliance.
11. Grounding or Polarization - The precautions that should be
taken so that the grounding or polarization means of an appli-
ance is not defeated.
12. 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.
13. Cleaning - The appliance should be cleaned only as recom-
mended by the manufacturer.
14. Nonuse Periods - The power cord of the appliance should be
unplugged from the outlet when left unused for a long period
of time.
15. Object and Liquid Entry - Care should be taken so that objects
do not fall and liquids are not spilled into the enclosure
through openings.
16. 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 dam-
aged.
17 Servicing - The user should not attempt to service the appli-
ance beyond that described in the operating instructions. All
other servicing should be referred to qualified service personnel.
CH4
LO HI
PRE/POST FADERPA N
EFFECT
SEND
10kHz 100Hz
INPUT 4(-10dBV)METER CH3
LO HI
PRE/POST FADERPA N
EFFECT
SEND
10kHz 100Hz
INPUT 3(-10dBV)METER CH2
LOHI
PRE/POST FADERPA N
EFFECT
SEND
10kHz 100Hz
INPUT 2(-10dBV~-50dBV)METER CH1
LOHI
PRE/POST FADERPA N
EFFECT
SEND
10kHz 100Hz
INPUT 1(-10dBV~-50dBV)METER
EFFECTMASTER
METER MASTER FADER
PHONESPHONESOUTPUT
(-10dBV) S/P DIF OUT
L
R L
R
EFFECT
TRIM TRIM
A/D A/D A/D A/D
D/A D/A
EFFECT
8. BLOCK DIAGRAMS
Page 2
VM04 VM04
3 22
FADER PCB
TABLE OF CONTENTS
NOTES
* Parts List and circuit diagrams are given in this manual to assist the service technician in maintaining the
Model VM04
* The following accessories are supplied with VM04 as the standard accessories.
Owner's manual : 8288440000
AC adaptor AD-9B : 8270818003 (for USA/CND)
: 8270818006 (for EUR)
: 8270818007 (for UK)
: 8270818010 (for JPN)
* Following is the packing material for the Model VM04.
PACK, SIDE, L, VM04 : 8228446000
PACK, SIDE, R, VM04 : 8228447000
CARTON, INNER, VM04 : 8228722000
CARTON, OUTER, VM04 : 8228901000
1. SPECIFICATIONS ............................................................................ 4
2. CONTROLS, INDICATORS AND CONNECTORS .................... 5
3. SERVICE MODE ............................................................................. 6
REPLACING THE BATTERY ............................................................................. 7
4. EXPLODED VIEW .......................................................................... 8
5. PARTS LIST ..................................................................................... 9
6. PCB PATTERN DRAWING ......................................................... 11
7. CIRCUIT DIAGRAMS .................................................................. 16
8. BLOCK DIAGRAMS ..................................................................... 23
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.
1234567891011121314151617
J401
FPC- 1 7 PAD+ 5
AD+ 5
AD+ 5
AD+ 5
DGND DGND ADGND ADGND ADGND
ADGND VR0
VR1
VR2
VR3
VR4
JOG0
JOG1
DGND
ADGND AD+ 5
3
2
1
R401
10KB
AD+ 5 ADGND
3
2
1
R402
10KB
AD+ 5 ADGND
3
2
1
R403
10KB
AD+ 5 ADGND
3
2
1
R404
10KB
AD+ 5 ADGND
3
2
1
R405
10KB
AD+ 5 ADGND
A 1B 2C 3
U401
EC12E
DGND
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