Fostex VM88 Service Manual

Service Manual

Model

8CH Digital Mixer with DSP Effects

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 MAR. 2000 8288789000

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.

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.

“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.

CAUTION:

TO PREVENT ELECTRIC SHOCK, MATCH
WIDE BLADE OF PLUG TO WIDE SLOT,
FULLY INSERT.

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.

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.

R

CH ON

A/D

ST OUT

D/A

10kHz

1kHz

100Hz

PAN

GAIN

MIC

L

(+4dBu)

To MON

ST OUT

To METER

D/A

ST MASTER

CH ON

EFF 1

HI

MID

LO

From DIGI IN

TRIM

(-10dBu~-50dBu)

-48V

12

AUX

12

EFF

R

ST

L

INSERT

PHANTOM (SETUP)

L

To DIGI OUT

ST MASTER

10kHz

To METER

1kHz

100Hz

To DIGI OUT

(-10dBV)

R

VM88 BLOCK DIAGRAM

ST OUT

(-10dBV)

HI

MID

LO

EFF 2

LINE

AUX 1 OUT

(-10dBV)

To MON

D/A

AUX 1

MASTER

AUX MASTER

AUX 1

AUX 2

PRE/POST

(+10dBu~-30dBu)

CH 1

CH 2

CH 3

D/A

CH 4

AUX 2 OUT

(-10dBV)

To MON

AUX 2

MASTER

To METER

To DIGI OUT

A/D

PAN

CH ON

10kHz

1kHz

100Hz

A/D

CH5 INPUT

(+4dBu~-40dBu)

L (M)

From AUX 1

MON

GAIN

MONO/STEREO

(SETUP)

DIGI IN

(SETUP)

TRIM

R

EFF 1

HI

MID

LO

SUB IN

(-10dBV)

AUX 1

From AUX 2

EFF 2

CH6 INPUT

(+4dBu~-40dBu)

L (M)

AUX 2

From ST

From DIGI IN

TRIM

AUX 1

R

ST

MON OUT

MON SEL

AUX 2

PRE/POST

CH5/6

(-10dBV)

PHONES

DIGI OUT

S/P DIF

ENCODE

From ST

EFF 1-2

DIGI IN

CH7/8

(100mW)

From CH1-A/D

From CH2-A/D

ASP

To CH4

To CH3

To CH2

To CH1

S/P DIF

or

ADAT

DIGI OUT

S/P DIF

ADAT

(SETUP)

ADAT

ENCODE

From CH8-A/D

From CH4-A/D

From CH3-A/D

From CH5-A/D

From CH7-A/D

From CH6-A/D

EFF MUTE

DIGITAL EFFECT

EFF 1

MASTER

To CH8

To CH7

To CH5

To CH6

DECODE

(SETUP)

DIGI IN

VM88

43

VM88 VM88

D+5

5

D+5

D+5

4

C33

100P

10

6

4

D+5

R984

10K

1

2 3

U923A

Q5Q

S

D2CK

DGND

U923B

Q9Q

S

D12CK

U920B 74VHC00

8

9

10

U920C

3

1

U920A

QA

QB

QC

ABCDENP

U919A

3 14

4 13

5 12

U928

6

3

8

11

2

QD

6 11

D+5

DTA114EK

74VHC00

74VHC74

R

74VHC74

R

C31

100P

74VHC00

157

1

13

DGND

RCO

ENTCKLOAD

291

10

U917B

DGND

R979

6

5

CLR

R985

10K

3

1

U929

DTC114EK

U924A

4

D+5

U924B

Q9Q

S

10

D12CK

74VHC161

100

74VHC86

4

3

S

2

Q5Q
D2CK

8

11

D+5

DGNDD+5

6

74VHC74

R

1

3

D+5

11

U920D

74VHC00

12

13

D+5

74VHC74

R

13

DGND

R982

100

U922B

Q9Q

S

10

D12CK

U922A

4

R980

S

8

11

Q5Q
D2CK

100

R983

R981

2.2K

74VHC74

R

13

6

74VHC74

R

3

D908

C32

100P

1SS 355

SPDIF//ADAT

SPDIF//ADAT

DGND

R969 NON

R968 22K

FCONT2

FCONT1

FCONT1

L7

22uH

0.01

C13

L98

D+5

FCONT2

C14

0.01

P GND

C27

220/10

820uH

1K

R971

R970 1K

/PLL1_CONT

/PLL2_CONT

/PLL2_CONT

/PLL1_CONT

10k

LOCK2

LOCK2

1

D+5

[DIF]

MCK

MCK

L4

EMI

U921B

Q9Q

S

10

D12CK

16151413121110

S2

S1

M2

M1

VDD

LOCK

REFPDVDDA

AMPI

AMPO

100

R972

PD2

PD1

R976 4.7 K

R975

VSSAXIXO

750

100

R973

PD1

PD2

1234567

L3

R978

R974

8

11

9

CKO

8

C15

100

330

R

EMI

VSS

0.01

C35

FS512

FS512

L6

EMI

4

7

9

12

1Y2Y3Y

74HC74

D+5

U925 TC9246F

C34

15P

U926A

M

R986 1

U927B

X902

PGND

C36

0.1

L5

74VHCU04

22.5792MHz

DGND

1A1B2A2B3A3B4A4BA/B

235

3 4

U927A

1 2

13

0.47

C16

0.01

EMI

C29

C28

6

111014

22P

74VHCU04

DGND DGND

22P

VCC

U927G

14

VCC

U926B

16

VCC

U924C

14

VCC

U923C

14

4Y

7

0.01

C25

8

0.01

C24

7

0.01

C23

7

13115

EXT//INT

EXT//INT

GND

74VHCU04

GND

74VHC157

GND

74VHC74

GND

74VHC74

74VHC157

G

DGND

TABLE OF CONTENTS

1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. CONTROLS, INDICATORS AND CONNECTORS . . . . . . . . . . . .

3. SERVICE MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST . . . . . .

5. CIRCUIT AND BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . .

4
6

7
10
23

NOTES

0.01

U922C

14

U921C

14

VCC

C21

VCC

C22

GND

74VHC74

7

0.01

GND

74VHC74

7

Service mode, exploded view, PCB assembly, parts list and circuit diagrams are given in this manual

*

to assist the service technician in maintaining the Model VM88.

The following accessories are supplied with VM88 as the standard accessories.

*

Owner's manual : 8288458000 (for export & domestic model)

0.01

U920E

14

U919B

16

U917E

14

C20

VCC

C19

VCC

C18

VCC

C17

GND

7

0.01

GND

8

0.01

GND

7

0.01

74VHC00

74VHC161

74VHC86

DGND

Following is the packing material for the Model VM88.

*

Carton, inner, VM88 : 8228737000
Packing, side, L, VM88 : 8228465001
Packing, side, R, VM88 : 8228465002

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.

U917A

PLL, DIGITAL, MAIN, VM88

MCK

1

2

DATA_IN

DATA_IN

74VHC86

6

U921A

Q5Q

S

4

D+5

D2CK

3

4. MAIN_D, DSP1 2

5. MAIN_D, DSP3

6. MAIN_D, DSP SEL

U927F

74HC04

74VHC74

R

1

LRCK

D+5

LRCK

U927E

74HC04

D+5

74HC04

U927D

56 98 1110 1312

U927C

DGND

74HC04

2. MAIN_D, CPU

1. MAIN_D, ROOT

8. MAIN_D, PLL

3. MAIN_D, DSP_ROOT

7. MAIN_D, GA_DIF

D+5

42 3

VM88 VM88

1. SPECIFICATIONS

Specification Unit 0 dBV = 1 Vr.m.s., 0 dBu = 0.775 Vr.m.s.
Standard Input

INPUT 1 ~ 4

Connector XLR Cannon (MIC)

Ø 6 mm TRS phone jack (LINE)

Input level -50 dBu ~ -10 dBu (MIC)

-30 dBu ~ +10 dBu (LINE)

Input impedance 3 kΩ or more (MIC)

10 kΩ or more (LINE)

INPUT 5 - 8

Connector Ø 6 mm TRS phone jack
Input level -40 dBu ~ +4 dBu
Input impedance 10 kΩ or more

INSERT 1 - 4

Connector Ø 6 mm TRS phone jack
Input level -10 dBV
Input impedance 10 kΩ or more

MON IN L, R

Connector Ø 6 mm TRS phone jack
Input level -10 dBV
Input impedance 10 kΩ or more

DATA IN

Connector Square shape optical
Format

S/P DIF IN IEC consumer optical standard (IEC 958 Part 3)
ADAT IN Alesis Proprietary Multichannel Optical Digital Interface

Standard Output

STEREO OUT L, R

Connector XLR Cannon

Ø 6 mm TRS phone jack

Output level +4 dBu (XLR Cannon)

-10 dBV (Ø 6 mm TRS phone jack)

Load impedance 10 kΩ or more (XLR Cannon & Ø 6 mm TRS phone jack)

AUX SEND 1, 2

Connector Ø 6 mm TRS phone jack
Output level -10 dBV
Load impedance 10 kΩ or more

MON OUT L, R

Connector Ø 6 mm TRS phone jack
Output level -10 dBV
Load impedance 10 kΩ or more

PHONES OUT L, R

Connector Ø 6 mm TRS phone jack
Output level 50 mW or more
Load impedance 32 Ω

DATA OUT

Connector Square shape optical
Format

S/P DIF OUT IEC consumer optical standard (IEC 958 Part 3)
ADAT OUT Alesis Proprietary Multichannel Optical Digital Interface

EQ

HI 10 kHz ± 18 dB (shelving type)
MID 1 kHz ± 18 dB (peaking type)
LO 100 Hz ± 18 dB (shelving type)

Fader (VR) Position at Standard Input / Output

Input Fader 80 position

INPUT 1 ~ 4 (TRS) +10 dBu, 1 kHz

pll.sch

DATA_IN

/PLL2_CONT

LOCK2

FCONT2

LRCK

SPDIF//ADAT

PLL

LRCK

DATA_IN

SPDIF//ADAT

/PLL2_CONT

LOCK2

FCONT2

C9

0.01

U918

81
82
83
84
85
86

0.01

C6

87
88
89
90
91
92
93
94
95
96
97
98
99
100

FS256

FS256

R966

U903C

LRCK

100

5 6

/LRCK

D+5

74VHC14

/LRCK

DGND

C26

10/16

R41

100

8

U914C

74VHC00

9

10

C44

100P

47

R40

11

U913D

74VHC00

12

13

BCK

BCK

DIGITAL I/F, DIGITAL, MAIN, VM88

FS512

EXT//INT

DATA_OUT

FS512

EXT//INT

FS512

EXT//INT

PD1

FCONT1

MCK

/PLL1_CONT

PD2

//

PD1

FCONT1

MCK

/PLL1_CONT

PD2

8079787776757473727170696867666564636261605958575655545352

PD2

MCK2

FCONT2

LOCK2

PLL2_CONT
CK_SEL2
CK_SEL1
CK_SEL0
PCMBW1
PCMBW0

FS256I

VSS

VDD

BCKI

LRCKI

LRCKO

BCKO

FS256O
W_IN1
W_IN2

W_OUT

TDO_FS1O

TDO_FS0O

TDO_EMPO

123456789

DGND

PD1

VSS

PIPOTEST1

SPDIF//ADAT

MCK1

LOCK1

FCONT1

PLL1_CONT

TEST2

VDDA4A3A2A1A0WRRDVSSCSRESETD0D1D2D3D4D5D6D7

A4A3A2A1A0

A[0...4]

A[0...4]

CPU>

DATA_OUT

R964

100

C7

0.01

DO2

DO1

DO_SEL1

ADAT_MD

/WR_DIF

DO_EMPI

/RD_DIF

/RD_DIF

/WR_DIF

CPU>

CPU>

DO_SEL0

101112131415161718192021222324252627282930

R965

VSS

VDD

DO_FS0I

DO_FS1I

D0D1D2D3D4D5D6

/RST_DIF

/CS_DIF

/RST_DIF

/CS_DIF

CPU>

CPU>

SPDIFOUT

SPDIFOUT

100

SOUT_DI

SOUT2_78

SOUT2_56

DGND

C30

100P

SOUT2_34

SOUT_78

SOUT_56

SOUT_78

SOUT_56

246

R967

VSS

SOUT2_12

SOUT1_78

SOUT1_56

CTL_PIN

D7

SOUT_34

SOUT_12

SOUT_34

SOUT_12

87

100 X 4

531

DI_EMPO

SOUT1_34

SOUT1_12

VDD

VSS

EN_IF

C12

D[0...7]

CPU> D[0...7]

51

DI_FS0O

SINA_MD

0.01

C10

DI_FS1O
DI_SEL
DI2
DI1
SIN_DIF
SINB_78
SINB_56
SINB_34
SINB_12
VDD
VSS
SINA_78
SINA_56
SINA_34
SINA_12
TDI_EMPI
TDI_FS0I
TDI_FS1I
SOUT2_MD
SOUT1_MD

DATA_IN

4. MAIN_D, DSP1 2

5. MAIN_D, DSP3

6. MAIN_D, DSP SEL

8. MAIN_D, PLL

2. MAIN_D, CPU

3. MAIN_D, DSP_ROOT

7. MAIN_D, GA_DIF

DATA_IN

0.01

GA_DIF

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31

0.01

C11

C8

0.01

1. MAIN_D, ROOT

ADO4
ADO3
ADO2
ADOA

ADO4
ADO3
ADO2
ADO1

ADO[1...4]

ADO[1...4]

STOUT

STOUT

4 41

VM88 VM88

Fader (VR) Position at Standard Input / Output (continued)

INPUT 5 ~ 8 (TRS) +4 dBu, 1 kHz

D+5

PAN L (R)

Master Fader Adjust so that ST OUT level is at -10 dBV. ( ST OUT SW: ON)

91011

WRDY_DSP[1...3]

DRDY_DSP[1...3]

INPUT 1 ~ 4 (TRS) +10 dBu, 1 kHz
INPUT 5 ~ 8 (TRS) +4 dBu, 1 kHz

/RST_DSP[1...3]

/WRQ_DSP[1...3]

U916C

74VHC10

8

WRDY_DSP[1...3]

DRDY_DSP[1...3]

PAN L (R)

MON OUT VR Adjust so that MON OUT level is at -10 dBV. (ST OUT SW: ON,

MON SEL SW: ST)

INPUT 1 ~ 4 (TRS) +10 dBu, 1 kHz
INPUT 5 ~ 8 (TRS) +4 dBu, 1 kHz

/RST_DSP[1...3]

/WRQ_DSP[1...3]

PAN L (R)

MON IN VR Adjust so that MON OUT level is at -10 dBV. (ST OUT: ON,

MON SEL: ST)

/RST_DSP1

/RST_DSP2

SO_DSP[1...3]

SCK_DSP[1...3]

/WRQ_DSP1
11

U914D

/WRQ_DSP

12

13

/WRQ_DSP2

74VHC00

U914A

1

74VHC00

234

/WRQ_DSP3
6

U914B

5

74VHC00

U915C

9

/RST_DSP3

8

U915D

74VHC00

10

12

3

11

2

/RST_DSP

74VHC00

SEL3
SEL2
SEL1

13

74VHC00

U915A

1

D+5

WRDY_DSP1

345

WRDY

U916B

4

U915B

6

WRDY_DSP2

WRDY_DSP3

74VHC10

6

5

74VHC00

U917C

DRDY

DRDY_DSP1

DRDY_DSP2

9

10

74VHC86

8

12

U917D

DRDY_DSP3

13

11

74VHC86

INPUT 1 ~ 4 (TRS) +10 dBu, 1 kHz
INPUT 5 ~ 8 (TRS) +4 dBu, 1 kHz
PAN L (R)

Output Level

INPUT 1 ~ 8
INPUT 1 ~ 8

→→

→ STEREO OUT -10 dBV ± 2 dB

→→
→→

→ MONITOR OUT -10 dBV ± 2 dB

→→

Frequency Response

INPUT 1 ~ 8

→→

→ STEREO OUT / MONITOR OUT / AUX SEND

→→

INPUT 1 ~ 4 20 Hz ~ 20 kHz +1, -3 dB (LINE level)
INPUT 1 ~ 4 20 Hz ~ 20 kHz +1, -3 dB (MIC level)
INPUT 5 ~ 8 20 Hz ~ 20 kHz +1, -3 dB (LINE level)

→→

→ PHONES OUT

→→

SO_DSP[1...3]

SCK_DSP[1...3]

R962 100

R963 100

INPUT 1 ~ 8

INPUT 1 ~ 4 30 Hz ~ 20 kHz +1, -3 dB (LINE level)
INPUT 1 ~ 4 30 Hz ~ 20 kHz +1, -3 dB (MIC level)
INPUT 5 ~ 8 30 Hz ~ 20 kHz +1, -3 dB (LINE level)

T.H.D. (w/ distortion filter NF3346A, 3347 or equivalent)

WRDY_DSP

DRDY_DSP

INPUT 1 ~ 8

→→

→ STEREO OUT / MONITOR OUT / AUX SEND

→→

INPUT 1 ~ 4 (0 dBu, XLR) 0.03 % or less

SO_DSP1

SI_DSP

SI_DSP

SCK_DSP1
11

U912D

12

13

U912C

74VHC00

9

SCK_DSP2

8

74VHC00

10

U912B

4

SCK_DSP3
6

74VHC00

5

3

U912A

1

D+5

74VHC00

2

SCK_DSP

SCK_DSP

SO

1

U913A

SEL3
SEL2
SEL1

SELECTOR

CPU (SBIO P18)> SI_DSP

DSP SELECT, DIGITAL, MAIN, VM88

CPU (SBTO P20)>

SO_DSP2

2

4

U913B

74VHC00

3

1213

U916A

R961

SO_DSP3

5

9

U913C

74VHC00

6

74VHC10

12

100

SO_DSP

SO_DSP

CPU (SBIO P19)<

4. MAIN_D, DSP1 2

5. MAIN_D, DSP3

2. MAIN_D, CPU

3. MAIN_D, DSP_ROOT

1. MAIN_D, ROOT

DGND

DRDY_DSP

6. MAIN_D, DSP SEL

8. MAIN_D, PLL

7. MAIN_D, GA_DIF

D+5

WRDY_DSP

VCC

U916D

14

C2

VCC

U915E

14

C5

VCC

U914E

14

C1

VCC

U913E

14

C3

VCC

U912E

14

C4

0.01

7

7

7

7

7

GND

GND

GND

0.01

GND

0.01

GND

74VHC00

0.01

74VHC00

0.01

74VHC00

74VHC00

74VHC00

SEL1
SEL2

74VHC00

SEL3

WRQ_DSP

SEL[1...3]

SEL[1...3]

WRQ_DSP

RST_DSP

RST_DSP

10

8

INPUT 1 ~ 4 (-40 dBu, XLR) 0.05 % or less
INPUT 1 ~ 4 (+20 dBu, TRS) 0.03 % or less
INPUT 1 ~ 4 (-20 dBu, TRS) 0.05 % or less
INPUT 5 ~ 8 (+14 dBu, TRS) 0.03 % or less
INPUT 5 ~ 8 (-30 dBu, TRS) 0.05 % or less

S/N (w/ distortion filter NF3346A, 3347 or equivalent)

INPUT 1 ~ 8

→→

→ STEREO OUT / MONITOR OUT

→→

INPUT 1 ~ 8 (LINE level, XLR) 90 dB or more
INPUT 1 ~ 4 (MIC level, XLR) 78 dB or more
INPUT 5 ~ 8 (MIC level, TRS) 86 dB or more

INPUT 1 ~ 8

→→

→ AUX SEND

→→

INPUT 1 ~ 8 (LINE level, XLR) 90 dB or more
INPUT 1 ~ 4 (MIC level, XLR) 78 dB or more
INPUT 5 ~ 8 (MIC level, TRS) 86 dB or more

Mic Gain

INPUT 1 ~ 4 40 dB ± 3 dB

INPUT 5 ~ 8 44 dB ± 3 dB
Crosstalk 60 dB or more at 1 kHz (50 dB or more at PHONES OUT)
Click Noise

POWER ON / OFF -20 dB p-p or less

Other switching -30 dB p-p or less
Shock Noise -30 dBVp-p

Specifications and appearance are subject to change without notice for product improvement.
“Adat” and symbol are trademarks of Alesis Corporation.

OPTICAL

40 5

VM88 VM88

2. CONTROLS, INDICATORS AND CONNECTORS

< Top Panel Section >

1

3

2

45367

EFFD[0...7]

EFFD0

EFFD1

EFFD2

EFFD3

EFFD4

EFFD5

21222325262728

I/O0

I/O1

I/O2

I/O3

I/O4

I/O5

EFFD6

EFFD7

29

I/O6

I/O7

D+5

/WE

6

CE2

DGND

/CE1

32

5

/OE

1

32

31

30

29
28

27
26
25

24
23

22 21

1. Input connector [

2. AUX send jack [

3. Stereo out connector [

MIC (2: HOT) / LINE

AUX SEND 1, 2

ST OUT L (2: HOT),

R (2: HOT) BAL / +4dBu / L, R UNBAL / -10dBV]

4. Stereo out ON/OFF switch [

5. Monitor in jack [

6. Monitor out jack [

MON IN L (MONO), R

MON OUT L (MONO), R

7. Foot switch connecting jack [

8. Headphone jack [

PHONES

9. Monitor out adjusting knob [

10. Headphone volume [

11. Monitor input adjusting knob [

12. Monitor select switch [

13. Scene Recall key [

14. Scene Store key [

15. Effect 2 key [

16. Effect 1 key [

SCENE RECALL /

SCENE STORE
EFF EDIT EFF1 /
EFF EDIT EFF2 /

OFF / ON

FOOT SW

]

GAIN -

MIN / MAX

GAIN -

ST / AUX1 / AUX2

]

]

∞ / +6 [dB]]

]

∞ / +6 [dB]]

DIRECT RCL

]

]

MUTE

]

MUTE

]

]

EFFD7

EFFD6

EFFD5

EFFD4

EFFD3

EFFD2

EFFD1

EFFD0

IO4

IO3

SDIND2

SDOUTD2

100

STOUT

R958

ST_B

/OE

IO2

IO1

IO0

EFFECT

SDOUT1

SDOUT2

SDIN1

EFF_A

EFF_B

ST_B

EFF_A

EFFA16

/OE

A16

SDIN2

LRCK

/LRCK

EFF_B

/LRCK

EFFA14

EFFA15

A15

BITCLK

BCK

BCK

EFFA13

A14

A13

CLKO

EFFA12

A12

CTRL

DVDD

EFFA11

A11

DVSS

EFFA9

EFFA10

A9

A10

AK7716

OPCL

XTI

FS512

FS512

A0A1A2A3A4A5A6A7A8A9A10

U911

20191817161514

EFFA0

EFFA1

EFFA8

0.01

C976

A8

DVDD
DVSS
A7
A6
A5
A4
A3
A2
A1
A0
/WE
/RAS
/CAS
DVDD
DVSS
EEST
DRDY
RDY
SO
SI
SCLK
/RQ
JX
EESEL
SMODE

XTO

25

0.01

C982

EFFA2

EFFA3

C978

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26

EFFA4

EFFA5

0.01

C980

AD+5

3

2311124117

13

EFFA6

EFFA7

EFFA8

EFFA9

C979

0.01

100

0.01

C981

10/16

DGND

2. MAIN_D, CPU

1. MAIN_D, ROOT

A11

A12

A13

A14

A15

EFFA10

EFFA11

EFFA12

EFFA13

EFFA14

EFFA15

EFFA7
EFFA6
EFFA5
EFFA4
EFFA3
EFFA2
EFFA1
EFFA0

R960

4. MAIN_D, DSP1 2

5. MAIN_D, DSP3

6. MAIN_D, DSP SEL

8. MAIN_D, PLL

3. MAIN_D, DSP_ROOT

7. MAIN_D, GA_DIF

VCC

A16

8

10

C995

EFFA16

D+5

C999

EFFA[0...16]

DRDY_DSP3
WRDY_DSP3

SI_DSP3
SCK_DSP3
/WRQ_DSP3

/WRQ_DSP3

SCK_DSP3

VSS

TC551001CFT-70L

24 30

0.01

DGND

16
10/

SI_DSP3

SI_DSP3

SO_DSP3

WRDY_DSP3

DRDY_DSP3

/WE

8
9

10
11

12

13

STOUT_L+

STOUT_L-

STOUT_R+

STOUT_R-

14

AUXSEND_BL+

AUXSEND_BL-

AUXSEND_BR+

AUXSEND_BR-

U910

STOUT_L+

STOUT_L-

STOUT_R+

15
16

17
18

AUXSEND_BL+

AUXSEND_BL-

AUXSEND_BR+

AUXSEND_BR-

C993

1500P

330

330

330

R954

R955

R953

AIN6+

AIN5-

AIN6-

C994

10/16

1500P

330

R956

AIN5+

C991

0.1

C992

A+5

STOUT_R-

C989

C987

10/16

10/16

AGND

76
77
78
79
80
81
82
83
84
85
86
87
88

0.1

C990

89
90
91
92
93

0.1

C988

94
95
96
97
98
99
100

10

R959

20 19

17. Enter key [

18. Exit key [

ENTER

EXIT

19. Data encoder [

20. Phantom LED [

]

21. Master fader [

22. Input fader [

]

23. PAN/EQ select key [

24. EFF/AUX select key [

25. Fader adjust key [

26. Channel On/Channel select key [

27. Level adjust key [

28. Contrast adjusting knob [

]

29. Display/status/meter section

]

30. TRIM knob
[

LINE +10/-30 [dBu] / MIC -10 / -50 [dBu]

31. Input jack 5 ~ 8 [

32. Insert jack 1 ~ 4 [

]

]

]

DATA

PHANTOM

MASTER

]

]

1, 2, 3, 4, 5/6, 7/8

PAN/EQ

EFF/SEL

FADER ADJUST

LEVEL ADJUST

]

INPUT 5, 6, 7, 8

INSERT 1, 2, 3, 4

]

]

]

]

CH ON/CH SEL

]

]

]

AIN6+

AIN5-

AIN6-

[ANA]

AIN5+

[ANA]

[ANA]

[ANA]

DGND

]

]

DSP3, DIGITAL, MAIN, VM88

AGND

C975

0.1

75747372717069686766656463626160595857565554535251

IO7

IO6

AOUTR2-

EECS

AOUTR2+

NC

AOUTL2-

AOUTL2+

NC

AOUTR1-

AOUTR1+

NC

AOUTL1-

AOUTL1+

NC

VRDAL

AVSS

AVDD

ARDAH

VCOM

VRADL

AVSS

AVDD

VRADH

AINR-

AINR+

AINL-

AINL+

TESTI1

123456789

0.1

C983

AGND

C998 NON
C997 47P
C996 47P

DVB

EEDI

EESK

EEDO

/INIT_RESET

/CODEC_RESET

/DSP_RESET

SMUTE

/INIT_RST

/CODEC_RST

/TST_DSP3

/INIT_RESET

/CODEC_RST

/RST_DSP3

IO5

DVSS

DVDD

DSP3

DVB

SDINA

SDOUTA

SDOUTD1

SDIND1

101112131415161718192021222324

AUX_B

ST_OUT

AUX_B

R957 100

SPDIFOUT

ADO3

SPDIFOUT

ADO3

6 39

VM88 VM88

OL

1

6
12
24
48

14678LR532

MAX

R

MIN

L

MID HILOPAN

A1 A2E2E1

SCENE NO.

OL

-3

-6

-9

-12

-18

-24

-36

RL

OPTICAL

CH

MASTER

44.1kHz

1 243

< Rear Panel Section >

A

B
H

D

C

E

G

F

< Display/status/meter Section >

330

R939

AIN4-

C967

AIN4-

[ANA]

1500P

330

R940

AIN4+

AIN4+

[ANA]

AUXSEND_AL+

AUXSEND_AL-

AUXSEND_AL+

AUXSEND_AL-

C968

1500P

330

330

R941

R942

AIN3-

AIN3+

AIN3-

AIN3+

[ANA]

[ANA]

AUXSEND_AR+

AUXSEND_AR-

10/16

C965

C966 0.1

A+5

AUXSEND_AR­AUXSEND_AR+

0.1

C964

C963

10/16

0.1

C961

C962

10/16

AGND

DVB

DVSS

DVDD

EEDO

/DSP_RESET

SMUTE

DVB

SDINA

/RST_DSP2

SOUT_12

C951

0.01

IO7

IO6

IO5

IO4

IO3

IO2

IO1

IO0

/OE

A16

A15

A14

U909

DSP2

SDOUTA

SDOUTD1

SDIND1

SDIND2

SDOUTD2

SDOUT1

SDOUT2

SDIN1

SDIN2

LRCK

BITCLK

CLKO

101112131415161718192021222324

246

ADO2

AUX_B

AUX_A

87

531

STOUT

EFF_B

100X 4

R950

ST_A

ST_B

/LRCK

BCK

EMI

L2

FS256

A13

A12

A11

AK7716

CTRL

DVDD

DVSS

A9

A10

OPCL

XTI

FS512

25

A8

XTO

0.01

C952

DVDD
DVSS
A7
A6
A5
A4
A3
A2
A1
A0
/WE
/RAS
/CAS
DVDD
DVSS
EEST
DRDY
RDY
SO
SI
SCLK
/RQ
JX
EESEL
SMODE

0.01

C956

C953

0.01

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26

0.01

C954

C955

10/16

AD+5

100

DGND

R947

/WRQ_DSP2

SCK_DSP2

SO_DSP2

/WRQ_DSP2

SO_DSP2

SCK_DSP2

SELECTOR>

SELECTOR>

SELECTOR>

WRDY_DSP2

DRDY_DSP2

WRDY_DSP2

DRDY_DSP2

SELECTOR<

SELECTOR<

A. Character display section
B. CHANNEL fader display section [CH]
C. MASTER fader display section [

MASTER

D. Digital in status display section

[

DIGITAL 44.1kHz / 48kHz

E. Scene number display [

]

SCENE NO.

F. LED level meter display section

[

L/R, OL, -3, -6, -9, -12, -18, -24, -

]

]

G. Status indicator [

EQ: PAN/LO/MID/HIGH

H. LCD level meter [

EFF/AUX: E1/E2/A1/A2,

]

OL/1/ /6/ /12/ /24/ /48,

1/2/3/4/5/6/7/8/L/R, MAX/MIN, R/ L

∞]

]

AGND

C950

0.1

75747372717069686766656463626160595857565554535251

EEDI

EESK

EECS

AOUTR2-

76

AOUTR2+

77

NC

78

AOUTL2-

79

AOUTL2+

80

NC

81

AOUTR1-

82

AOUTR1+

83

NC

84

AOUTL1-

85

AOUTL1+

86

NC

87

VRDAL

88

AVSS

89

AVDD

90

ARDAH

91

VCOM

92

VRADL

93

AVSS

94

AVDD

95

VRADH

96

AINR-

97

AINR+

98

AINL-

99

AINL+

100

TESTI1

/INIT_RESET

/CODEC_RESET

123456789

10

R952

0.1

C957

DGND

AGND

/INIT_RST

/CODEC_RST

C974 NON
C973 47P
C972 47P

ADO2

AUX_B

STOUT

EFF_B

ST_B

IO1

IO0

/OE

U908

SDOUT2

SDIN1

SDIN2

SOUT_34

SOUT_56

EFF_A

SOUT_34

SOUT_56

A16

LRCK

100

100

R946

R945

/LRCK

BCK

/LRCK

FS256

A15

A14

AK7716

BITCLK

CLKO

BCK

A13

CTRL

A12

A11

DVDD

DVSS

A9

A10

OPCL

XTI

FS512

FS512

25

A8

XTO

0.01

C933

DVDD
DVSS
A7
A6
A5
A4
A3
A2
A1
A0
/WE
/RAS
/CAS
DVDD
DVSS
EEST
DRDY
RDY
SO
SI
SCLK
/RQ
JX
EESEL
SMODE

0.01

C934

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26

C935

0.01

100

R943

SI_DSP

/WRQ_DSP1

SCK_DSP1

SO_DSP1

WRDY_DSP1

DRDY_DSP1

1. Digital in/out jack [

2. RESET switch [

RESET

DIGITAL IN/OUT

]

]

3. POWER switch [

4. AC IN connector [

POWER

AC IN

]

]

3. SERVICE MODE

3-1. Software Version Check

While holding down both the PAN/EQ and EFF/AUX keys, press the EFF 1 key. The LCD display will show the
VM08 software version for about a second, then return to the normal display mode. The example below shows that
the software version is V1.02.

0.01

C937

C936

10/16

AD+5

DGND

WRDY_DSP1

DRDY_DSP1

/WRQ_DSP1

SI_DSP

SELECTOR>

SELECTOR>

SO_DSP1

SCK_DSP1

SELECTOR>

SELECTOR<

SELECTOR<

SOUT_12

/RST_DSP2

AGND

C931

0.1

4. MAIN_D, DSP1 2

5. MAIN_D, DSP3

6. MAIN_D, DSP SEL

8. MAIN_D, PLL

2. MAIN_D, CPU

3. MAIN_D, DSP_ROOT

7. MAIN_D, GA_DIF

C945

0.1

C944

C947 0.1

C942

10/16

C943

10/16

AGND

0.1

10

R951

10/16

1. MAIN_D, ROOT

C948

1500P

R935 330

R936 330

AIN2-

AIN2+

C946

C949

1500P

R937 330

A+5

R938 330

AIN1-

AIN1+

AIN1-

AIN2-

[ANA]

DSP1 & 2, DIGITAL, MAIN, VM88

AIN1+

AIN2+

[ANA]

[ANA]

[ANA]

76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

75747372717069686766656463626160595857565554535251

DVB

EEDI

AOUTR2-

EESK

EECS

DVDD

EEDO

AOUTR2+

NC

AOUTL2-

AOUTL2+

NC

AOUTR1-

AOUTR1+

NC

AOUTL1-

AOUTL1+

NC

VRDAL

AVSS

AVDD

ARDAH

VCOM

VRADL

AVSS

AVDD

VRADH

AINR-

AINR+

AINL-

AINL+

TESTI1

/INIT_RESET

/CODEC_RESET

/DSP_RESET

SMUTE

DGND

123456789

0.1

C938

AGND

C971 NON
C970 47P
C969 47P

/INIT_RESET

/CODEC_RST

/RST_DSP

/INIT_RESET

/CODEC_RST

/RST_DSP

DVB

38 7

0.01

C932

IO7

IO6

IO5

IO4

IO3

DVSS

IO2

DSP1

SDINA

SDOUTA

SDOUTD1

SDIND1

SDIND2

SDOUTD2

SDOUT1

101112131415161718192021222324

246

87

4
X

R944

100

531

ADO1

AUX_A

ST_A

SOUT_78

SOUT_78

EFF_A

ADO1