Yamaha M2500-56C, M2500-48C, M2500-40C, M2500-32, M2500-24 Service Manual

M2500

MIXING CONSOLE

SERVICE MANUAL

M2500-56C

CONTENTS

SPECIFICATIONS .............................................. 3/5

DIMENSIONS ............................................................ 8

PANEL LAYOUT ..................................... 9

CIRCUIT BOARD LAYOUT .............. 16

DISASSEMBLY PROCEDURE ............................ 18

LSI PIN DESCRIPTION .............................. 26

IC BLOCK DIAGRAM ................................... 30

CIRCUIT BOARDS ....................................... 33

INSPECTIONS ....................................................... 61/69

TEST PROGRAM ............................. 76/78

ERROR MESSAGES ....................... 80/81

MIDI IMPLEMENTATION CHART ......................................... 82

CIRCUIT DIAGRAMS
PARTS LIST

011484

PA

M2500-24 20000220-850000
M2500-32 20000220-1000000
M2500-40C 20000220-1150000

1/2

M2500-48C 20000220-1300000
M2500-56C 20000220-1450000
PW3000MA 20000220-100000

HAMAMATSU, JAPAN

1.50K-5972 Printed in Japan 2000.02

1

M2500

IMPOR TANT NOTICE

This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed
that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and under­stood by the users, and have therefore not been restated.

WARNING : Failure to follow appropriate service and safety procedures when servicing this product may result in per-

IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-

The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and
service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable
and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to
exist, please contact the distributor’s Service Division.

WARNING : Static discharges can destroy expensive components. Discharge any static electricity your body may have

IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power

sonal injury, destruction of expensive components and failure of the product to perform as specified. For
these reasons, we advise all Yamaha product owners that all service required should be performed by an
authorized Yamaha Retailer or the appointed service representative.

cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.

accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to
this bus.)

to the unit.

LITHIUM BA TTERY HANDLING

This product uses a lithium battery for memory back-up.

WARNING : Lithium batteries are dangerous because they can be exploded by improper handling. Observe the following pre-

Leave lithium battery replacement to qualified service personnel.
Always replace with batteries of the same type.
When installing on the PC board by soldering, solder using the connection terminals provided on the battery cells.
Never solder directly to the cells. Perform the soldering as quickly as possible.
Never reverse the battery polarities when installing.
Do not short the batteries.
Do not attempt to recharge these batteries.
Do not disasemble the batteries.
Never heat batteries or throw them into fire.

ADVARSEL!

Lithiumbatteri-Eksplosionsfare ved fejlagtig handtering. Udskiftning ma kun ske med batteri af samme fabrikat og type. lever det brugte
batteri tilbage til leverandren.

VARNING

Explosionsfara vid felaktigt batteribyte.
Anvand samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren.
Kassera anvant batteri enligt fabrikantens instruktion.

VAROITUS

Paristo voi rajahtaa, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiiin.
Havita kaytetty paristo valmistajan ohjeiden mukaisesti.
The following information complies with Dutch official Gazette 1995. 45; ESSENTIALS OF ORDER ON THE COLLECTION OF BATTERIES.

• Please refer to the diassembly procedure for the removal of Back-up Battery.

• Leest u voor het verwijderen van de backup batterij deze beschrijving.

cautions when handling or replacing lithium batteries.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (Where
applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly
other entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT
SO EVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose
eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling
food.

WARNING

Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.

2

SPECIFICATIONS

M2500

General specifications

0 dB is referenced to 0.775 Vrms.
Total Harmonic Distortion Less than 0.1% (THD+N)

(Master output) 20 Hz–20 kHz @ +14 dB 600 Ω

Frequency Response 0+1, –3 dB
(Master Output) 20 Hz–20 kHz @ +4 dB 600 Ω

Hum & Noise (20 Hz–20 kHz)*1
Rs= 150 Ω –99 dB Residual Output Noise.

Input Gain= Max.
Input Pad= OFF
||
Input sensitivity= –60 dB

–64 dB(68 dB S/N) STEREO OUT Master Level control and
–80 dB(84 dB S/N) STEREO OUT, MONO/C OUT Master f ader

–81 dB(85 dB S/N) GROUP1/AUX7–GROUP8/AUX14 OUT

–75 dB(79 dB S/N) AUX1–6, AUX7/GROUP1–AUX14/GROUP8

–90 dB(94 dB S/N) MATRIX OUT Master level control at nomi-

Crosstalk –70 dB @ 1 kHz adjacent inputs.

–70 dB @ 1 kH input to output. (CH INPUT)
–50 dB @ 1 kHz input to output. (ST CH INPUT)

Maximum Voltage Gain
GROUP/AUX FLIP SW= off

60 dB CH INPUT to CH INSERT OUT
84 dB CH INPUT to GROUP1/AUX7–GROUP8/

80 dB CH INPUT to AUX1, 2 OUT(Pre Fader)
90 dB CH INPUT to AUX3–6, AUX7/GROUP1–

84 dB CH INPUT to STEREO OUT(CH to ST)

70 dB CH INPUT to MONITOR OUT(PFL)
CH INPUT PAD SW 26 dB
CH INPUT GAIN control 44 dB variable
ST CH 1A, 2–4 INPUT GAIN control

ST CH 1B INPUT GAIN control

CH INPUT High Pass Filter 18 dB/octave

CH INPUT Equalization

+15, –15 dB maximum

HIGH 10 kHz (shelving)

HIGH-MID 400– 8 kHz (peaking)

LOW-MID 80–1.6 kHz (peaking)

LOW 100 Hz (shelving)

Gain control at minimum level

–128 dB Equivalent Input Noise.

(STEREO OUT, MONO/C OUT,

GROUP/AUX OUT, AUX OUT,
AUX/GROUP OUT)

one Ch fader at nominal level.
at nominal level and all Ch assign SW’s off

and all GROUP to ST SW’s off.
Master Level control at nominal lev el and all

Ch assign SW’s off.
GROUP/AUX FLIP SW off.

OUT Master Level control at nominal level
and all Ch send controls at minimum.
GROUP/AUX FLIP SW off.

nal level and all Matrix Mix controls at mini­mum level.

AUX14 OUT

AUX14/GROUP8 OUT(Post Fader)

40 dB variable

30 dB variable

roll-off below 80 Hz at –3 dB point.

ST CH INPUT Equalization

+15, –15 dB maximum

Phantom Power +48 VDC is applied to balanced inputs (via

CH LED Indicators

ST CH LED Indicators

Oscillator/Noise Switchable sine wave @ 100 Hz, 1 kHz or

Scene Memory Direct Scene Memory recall switches (1–8)

VU Meters 11 illuminated meters

VU Meter Peak Indicators LED(red) built into each VU meter turns on

Dimension Heigt 265 mm

Weight 102kg(56C), 93kg(48C), 84kg(40C),

*1 Hum & Noise are measured with a 6 dB/octave filter @ 12.7 kHz;

equivalent to a 20 kHz filter with infinite dB/octave attenuation.
For European Model

Purchaser/User information specified in EN55103-1 and EN55103-2.
Conformed Enviroment: E1, E2, E3 and E4.

PEAK LED(red) built into each CH INPUT turns on
NOM LED(yellow) b uilt into each CH INPUT turns
SIGNAL LED(green) built into each CH INPUT turns

PEAK LED(red) built into each ST CH INPUT turns

NOM LED(yellow) built into each ST CH INPUT

SIGNAL LED(green) built into each ST CH INPUT

#1 ; GROUP1/AUX7
#2 ; GROUP2/AUX8
#3 ; GROUP3/AUX9
#4 ; GROUP4/AUX10
#5 ; GROUP5/AUX11
#6 ; GROUP6/AUX12
#7 ; GROUP7/AUX13
#8 ; GROUP8/AUX14
#9 ; STEREO L
#10 ; MONO/C
#11 ; STEREO R

Depth 875 mm (except rear connectors)
Width 2385 mm(56C), 2142 mm(48C),

HIGH 10 kHz (shelving)
LOW 100 Hz (shelving)

6.8 kΩ current-limiting/isolation resistors) for
powering condenser microphones; may be
turned ON or OFF via rear-panel phantom
Master switch.
When Master is ON, individual channels
may be turned ON or OFF via +48V
switches (with red LED) on each input chan­nel.

when pre-Fader level reaches +17 dB.
on when pre-Fader level reaches 0 dB.
on when pre-Fader level reaches –13 dB.

on when pre-Fader [L+R] level reaches
+17 dB.

turns on when pre-Fader [L+R] level
reaches 0 dB.

turns on when pre-Fader [L+R] level
reaches –13 dB.

10 kHz, or pink noise.

Switchable Scene Memory recall (1–128)

(0VU= +4 dB output @ 600Ω load)

•

AUX1•AUX7/GROUP1•MATRIX1

•

AUX2•AUX8/GROUP2•MATRIX2

•

AUX3•AUX9/GROUP3•MATRIX3

•

AUX4•AUX10/GROUP4•MATRIX4

•

AUX5•AUX11/GROUP5•MATRIX5

•

AUX6•AUX12/GROUP6•MATRIX6

•

NONE•AUX13/GROUP7•MATRIX7

•

NONE•AUX14/GROUP8•MATRIX8

•

PFL/AFL L

•

PFL/AFL R

when output signal is above the level 3 dB
lower than clipping level.

1899 mm(40C), 1642 mm(32),
1400 mm(24)

71kg(32), 62kg(24)

3

M2500

Input/output characteristics

Input specifications

Connection PAD

CH INPUT

*8

(1–n)

ST CH 1A INPUT
[L, R]

ST CH 1B INPUT
[L, R]

ST CH INPUT
[L, R] (2–4)

*9

Input Level

Nominal Max before Clip

Gain

Actual Load

Trim

Impedance

0

–60

26 –54 dB(1.55 mV) –34 dB(15.5 mV) –14 dB(155 mV)

0

–16

26 –10 dB(245 mV) +10 dB(2.45 V) +30 dB(24.5 V)

–30
+10 –10 dB(245 mV) +10 dB(2.45 V) +30 dB(24.5 V)
–20
+10 –10 dB(245 mV) +10 dB(2.45 V) +30 dB(24.5 V)
–30
+10 –10 dB(245 mV) +10 dB(2.45 V) +30 dB(24.5 V)

3 kΩ

5 kΩ 600 Ω Lines

10 kΩ 600 Ω Lines

5 kΩ 600 Ω Lines

For Use With

Nominal

50–600 Ω Mics

&

600 Ω Lines

Sensitivity

–80 dB(0.078 mV) –60 dB(0.775 mV) –40 dB(7.75 mV)

–36 dB(12.3 mV) –16 dB(123 mV) +4 dB(1.23 V)

–50 dB(2.45 mV) –30 dB(24.5 mV) –10 dB(245 mV)

–40 dB(7.75 mV) –20 dB(77.5 mV) 0 dB(0.775 V)

–50 dB(2.45 mV) –30 dB(24.5 mV) –10 dB(245 mV)

*1

Connector In

Mixer

XLR-3-31 type

Phono Jack

Phone Jack(TRS)

TALKBACK IN 10 kΩ 50–600 Ω Mics –66 dB(0.388 mV) –50 dB(2.45 mV) –20 dB(77.5 mV) XLR-3-31 type
MATRIX SUB IN [L, R]
STEREO [L, R] MONO/C SUB IN –6 dB(388 mV)
CH INSERT IN (1–n)

*8

STEREO [L, R] MONO/C INSERT IN
GRP/AUX INSERT IN (1/7–8/14)

10 kΩ 600 Ω Lines

10 kΩ 600 Ω Lines

–2 dB(0.616 V)

–26 dB(38.8 mV)

–10 dB(245 mV)

+4 dB(1.23 V) +24 dB(12.3 V) Phone Jack(TRS)

0 dB(0.775 V) +20 dB(7.75 V) Phone Jack(TRS)

AUX INSERT IN (1–6)

*1 0 dB=0.775 Vrms.
*2 Balanced.
*3 Unbalanced.
*4 Balanced (T=HOT, R=COLD, S=GND).
*5 Unbalanced.
*6 Unbalanced (T=SIGNAL, R=GND, S=GND).
*7 Unbalanced (T=OUTPUT, R=INPUT, S=GND).
*8 n=56, 48, 40, 32 or 24
*9 Sensitivity is the lowest level that will produce an output of +4 dB(1.23 V), or the nominal output level when the unit is set to maximum level.

*2

*3

*4

*5

*6

*7

Output specifications

Connection

STEREO OUT [L, R]
MONO/C OUT
GRP/AUX OUT (1/7–8/14)
AUX/GRP OUT (7/1–14/8)
AUX OUT (1–6)
MONITOR OUT [L, R, MONO/C]
MATRIX OUT (1–8)

CH INSERT OUT (1–n)
STEREO INSERT OUT [L, R]
MONO/C INSERT OUT
GRP/AUX INSERT OUT (1/7–8/14)
AUX INSERT IN (1–6)

PHONES OUT [L, R] 100 Ω

*1 0 dB=0.775 Vrms.
*2 Balanced.
*3 Unbalanced (T=OUTPUT, R=INPUT, S=GND).
*4 Unbalanced.
*5 n=56, 48, 40, 32 or 24

4

*5

Actual Source

Impedance

For Use With

Nominal

Output Level

Nominal Max before Clip

*1

Connector In Mixer

150 Ω 600 Ω Lines +4 dB(1.23 V) +24 dB(12.3 V) XLR-3-32 type

600 Ω 10 kΩ Lines 0 dB(0.775 V) +20 dB(7.75 V) Phone Jack(TRS)

8 Ω Phones 10 mW 20 mW

40 Ω Phones 30 mW 75 mW

Stereo Phone Jack

*2

*3

*4

Other

Connector wiring

Pin No. Signal name

1 Power supply remote
2 +15 V
3 ±15 V GND
4 +48 V GND
5 –15 V
6 +12 V
7 +12 V GND / power supply remote
8 Power supply remote
9 +48 V

10 FRAME GND

M2500

3 2 1

7 6 5 4

10 9 8

Included items

Power supply connection cable (3 m, 10 pin)

7

M2500

DIMENSIONS

Front

1400: M2500-24
1642: M2500-32
1899: M2500-40C
2142: M2500-48C
2385: M2500-56C

Side

265

23242

137270270

875

Rear

792422 88

55 55

55 55

55 55

55 55

847 847

968 968

597 597

792422 331

718 718

792768154 88

792768399 88

M2500-24

M2500-32

M2500-40C

M2500-48C

792768399 331

M2500-56C

55 55

8

740 740700

Units :mm

PANEL LAYOUT

Control panel

Input channel section

Monaural input channels

M2500

EQ

PRE

PRE

PRE

1
2

–34

3
5

80

6

7

010

AUX14

PAN

LCR

ODD EVEN

1-2

MONO

3-4

5-6

7-8

CHECK
ON

10

ST

11

LCR

12

ON/EDIT

9

14

10

PEAK

5

SIGNAL

0

5

10

20

30

40
50
60

NOM

PFL

13

15

+48V

GAIN

+10

–16 –60

26dB

4

HI

–15 +15

HI-MID

400 8k

–15 +15

LO-MID

80 1.6k

–15 +15

LO

–15 +15

010

AUX1 PRE

010

AUX2

010

AUX3

010

AUX4

010

AUX5

010

AUX6

8

010

AUX7

010

AUX8

010

AUX9

010

AUX10

010

AUX11

010

AUX12

010

AUX13

010

AUX14

PAN

C

+48 V (phantom power) switch

1

GAIN control

2

26 dB pad switch

3

φ

(phase) switch

4

(high pass filter) switch

5

80

EQ controls

6

EQ switch

7

AUX 1–AUX 14 controls

8

PRE switches

9

PAN control

10

Channel assign switches

11

ON/EDIT switch / ON, CHECK indicators

12

PEAK/NOM/SIGNAL indicators

13

Channel fader

14

PFL (pre-fader listen) switch

15

9

M2500

Stereo input channels

GAIN

A

+10 –30

B

+10 –20

HI

–15 +15

LO

GAIN A control

1

GAIN B control

1
2

A
B

3

4

2

A/B switch

3

EQ controls

4

EQ switch

5

AUX 1–AUX 14 controls

6

PRE switches

7

BAL control

8

Channel assign switches

9

ON/EDIT switch / ON, CHECK indicators

10

PEAK/NOM/SIGNAL indicators

11

Channel fader

12

PFL (pre-fader listen) switch

13

–15 +15

5

EQ

010

AUX1 PRE

010

AUX2

010

AUX3

010

010

AUX4

PRE

010

AUX5

010

AUX6

6

010

AUX7

010

AUX8

010

AUX9

010

AUX10

010

AUX11

010

AUX12

010

AUX13

010

AUX14

BAL

LCR

ODD EVEN

PRE

PRE

7

12

AUX14

BAL

LR

ODD EVEN

1-2

3-4

5-6

7-8

ON/EDIT

10

5

SIGNAL

0

5

10

20

30

40
50
60

ST

MONO

CHECK
ON

PEAK

NOM

PFL

8

9

10

11

13

10

M2500

GROUP/AUX master section

AUX 1-6 section

1

10

5

0

5

10

20

30

40
50
60

AUX1

2

ON switches

1

AUX 1–6 master faders

2

AFL (after fader listen) switches

3

10

ON

5

0

5

10

20

30

40
50
60

AFL

AUX2

10

ON

5

0

5

10

20

30

40
50
60

AFL

AUX3

10

ON

5

0

5

10

20

30

40
50
60

AFL

AUX4

3

A7/G1-A14/G8 section

10

ON

5

0

5

10

20

30

40
50
60

AFL

AUX5

10

ON

AFL

ON

5

0

5

10

20

30

40
50
60

2

AFL

AUX6

1

010

LEVEL

ON

AFL

A7 / G1

010

LEVEL

ON

AFL

A8 / G2

3

LEVEL control

1

ON switch

2

AFL switch

3

010

LEVEL

ON

AFL

A9 / G3

010

LEVEL

ON

AFL

A10 / G4

010

LEVEL

ON

AFL

A11 / G5

010

LEVEL

ON

AFL

A12 / G6

010

LEVEL

ON

AFL

A13 / G7

010

LEVEL

ON

AFL

A14 / G8

G1/A7-G8/A14 section

PAN

4

MATRIX ST

5

6

7
8

G1 / A7

LCR

ON/EDIT

10

5

0

5

10

20

30

40
50
60

MONO

LCR

CHECK
ON

AFL

PAN

LCR

MATRIX ST

MONO

CHECK
ON

ON/EDIT

10

5

0

5

10

20

30

40
50
60

G2 / A8

LCR

AFL

PAN

LCR

MATRIX ST

MONO

CHECK
ON

ON/EDIT

10

5

0

5

10

20

30

40
50
60

G3 / A9

LCR

AFL

PAN

LCR

MATRIX ST

MONO

CHECK
ON

ON/EDIT

10

5

0

5

10

20

30

40
50
60

G4 / A10

LCR

AFL

PAN

LCR

MATRIX ST

MONO

CHECK
ON

ON/EDIT

10

5

0

5

10

20

30

40
50
60

G5 / A11

LCR

AFL

PAN

LCR

MATRIX ST

MONO

CHECK
ON

ON/EDIT

10

5

0

5

10

20

30

40
50
60

G6 / A12

LCR

AFL

PAN

LCR

MATRIX ST

MONO

CHECK
ON

ON/EDIT

10

5

0

5

10

20

30

40
50
60

G7 / A13

LCR

AFL

PAN

LCR

MATRIX ST

MONO

CHECK
ON

ON/EDIT

10

5

0

5

10

20

30

40
50
60

G8 / A14

LCR

AFL

PAN control

4

Channel assign switches

5

ON/EDIT switch / ON, CHECK indicators

6

Fader

7

AFL (after fader listen) switch

8

11

M2500

GROUP/AUX FLIP switch

GROUP
AUX

GROUP/AUX FLIP

Stereo/monaural master section

STEREO section MONO/C section

1

2

MATRIX MATRIX

CHECK
ON

CHECK
ON

ON/EDITON/EDIT

5

6

When GROUP ( ) is selected
When AUX ( ) is selected

MATRIX switch

1

ON/EDIT switch / ON, CHECK indicators

2

Fader

3

AFL switch

4

MATRIX switch

5

ON/EDIT switch / ON, CHECK indicators

6

Fader

7

AFL switch

8

10

5

0

5

10

20

30

40

50

3

60

4

Matrix section

AFL

SUB IN

ST

0

MONO/C

0

G1 / A7

0

G2 / A8

0

G3 / A9

0

G4 / A10

0

G5 / A11

0

G6 / A12

0

G7 / A13

0

G8 / A14

10

5

0

5

10

20

30

40
50
60

8

AFL

7

MONO/CSTEREO

SUB IN L/R control

1

ST L/R controls

2

0L0

0L0

1

R

2

R

3

MONO/C control

3

G1/A7–G8/A14 controls

4

LEVEL control

5

ON switch

6

AFL switch

7

4

12

010

LEVEL

6

ON

MATRIX 1

5
7

AFL

M2500

G1-8/A7-14

AUX1-6

A7-14/G1-8

MATRIX

METER

SELECT

1
2
3
4

Monitor section

1

INPUT
MASTER

MASTER

PFL

L+R

010

LEVEL

ON

MONITOR

010

PHONES

Meter select section

MATRIX switch

1

A7-14/G1-8 switch

2
3

4
5

INPUT indicator

1

MASTER indicator

2

MASTER PFL switch

3

L+R switch

4

LEVEL control

5

ON switch

6

PHONES (headphone) control

7

PHONES jack

8

2

AUX 1-6 switch

3

G1-8/A7-14 switch

4

Control section

6

UTILITY

RECALL

7

MEMORY

STORE

CHECK

1
2
3
4

5

UTILITY switch

1

RECALL switch

2

MEMORY display

3

STORE switch

4

CHECK switch

5

0–9/ENTER switches

6

/ switches

7

DIRECT RECALL 1–8 switches

8

8

Talkback/oscillator section

PINK

1

2

10kHz

1kHz

100Hz

ON

OSCILLATOR

AUX1-2

AUX3-6

AUX7-10

AUX11-14

3

ST

MONO/C

4
5

MIC

010

TB/OSC

ON

TALKBACK

6
7
8
9

10
11

OSCILLATOR select switches

1

OSCILLATOR ON switch

2

MIC jack

3

TB/OSC control

4

ON switch

5

AUX 1-2 switch

6

AUX 3-6 switch

7

AUX 7-10 switch

8

AUX 11-14 switch

9

ST switch

10

MONO/C switch

11

1 2

3 4

5 6

7 8

9

ENTER

SCENE

MEMORY

DIRECT
RECALL

CONTROL

6

0

7

1

2

3

4

8

5

6

7

8

13

M2500

+

3

0

1

3

PEAK

V

7

10

20

Meter bridge

PEAK

357

1

0

10

20

3

+

VU

1
2
3
4
5

Rear panel

PEAK

357

1

0

10

20

3

+

VU

1/7–8/14 level meters
+15V/–15V/+12V indicators
PHANTOM MASTER indicator
STEREO, PFL/AFL level meters
MONO/C level meter

1 2 4

Monaural input channel input/output jacks

24

INPUT

23

INPUT

22

INPUT

21

INPUT

INPUT

–

10

20

STEREO R

PFL/AFL R

PEAK

357

1

0

3

+

VU

PEAK

357

1

0

10

20

3

+

VU

PEAK

357

10

20

VU

8/147/132/81/7

+15V

1

0

3

–15V
+12V

+

PHANTOM MASTER

20

10

PFL/AFL L

PEAK

357

1

0

3

+

VU

3

INPUT jacks

1

INSERT I/O jacks

2

20

19

INPUT

18

INPUT

17

INPUT

PEAK

357

1

0

10

20

3

+

VU

MONO/CSTEREO L

5

1

INSERT

I/O

I/O

INSERT

0

dB

INSERT

0

dB

I/O

INSERT

0

dB

I/O

INSERT

0

dB

2

Stereo input channel input/output jacks

INPUT

R

ST CH 1

INPUT A

L

R

ST CH 4

ST CH 3

INPUT

L/MONO

5

L/MONO

R

ST CH 2

INPUT

L/MONO

R

I/O

I/O

INSERT

0

dB

INSERT

0

dB

3
4
5

INSERT

I/O

I/O

0

0

dB

dB

INPUT A jacks
INPUT B jacks
INPUT jacks

3

PHANTOM

MASTER

OFF ON

INPUT B

L

4

READ OWNER’S MANUAL

R

DC POWER INPUT

14

Master section input/output jacks

M2500

12

MIDI

IN

OUT

THRU

6 5 4 3

MONITOR

OUT

+4

dB

L

MONO

/C

R

ST OUT

+4

MONO

11 10

AUX OUT jacks

1

GRP/AUX OUT jacks

2

AUX/GRP OUT jacks

3

MATRIX OUT jacks

4

ST OUT, MONO/C OUT jacks

5

MONITOR OUT jacks

6

SUB IN MATRIX jacks

7

SUB IN ST L/R, MONO/C jack

8

INSERT I/O G1/A7–G8/A14 jacks

9

INSERT I/O AUX jacks

10

INSERT I/O ST L/R, MONO jacks

11

MIDI connectors

12

dB

L

/C

R

AUX

MATRIX OUT

123456

INSERT I/O

2 1

+4

dB

15

26

37

48

+4

dB

AUX/GRP OUT

A11/
G6

A12/
G6

A13/
G7

A14/
G8

+4

dB

A7/
G1

A8/
G2

A9/
G3

A10/
G4

GRP/AUX OUT

G5/
A11

G6/
A12

G7/
A13

G8/
A14

+4

dB

G1/
A7

G2/
A8

G3/
A9

G4/
A10

AUX OUT

ST LMONO/CST RST LMONO/CST R G1/A7G2/A8G3/A9G4/A10G5/A11G6/A12G7/A13G8/A14

SUB IN

+4

dB

13

24

5

6

MATRIX

LR

+4

dB

9 8 7

PHANTOM

MASTER

OFF ON

READ OWNER’S MANUAL

PHANTOM MASTER switch

13

DC POWER INPUT connector

14

DC POWER INPUT

13
14

15

M2500

INJK

CIRCUIT BOARD LAYOUT

IN1 IN3IN2 INPAN

IN4

CTRL 3/5

STJK

CTRL 4/5
CTRL 5/5

MASOUT3

MASOUT4

MASOUT1

MASOUT

ST1

ST2

MAS1

MAS2 1/2

CTRL 2/5
CTRL 1/5

MAS3 2/2

MAS2 2/2

MAS4
MAS3 1/2

MASPAN

ST4
ST3

INJK

16

IN1 IN2 INPAN IN3

IN4

56CH

M2500-56C

ISRT 3/6

ISRT 5/6

METER2 2/2

2/3

M2500

METER2 2/2

1/3

ISRT 1/6

ISRT 6/6

ISRT 2/6

ISRT 4/6

METER2 1/2

2/3

METER2 1/2

3/3

METER1

2/3

METER2 1/2

1/3

METER1

1/3

METER1

3/3

17

<P.2>M2500 BLOCK & LEVEL DIAGRAM

CH INPUT(IN

INPUT(ST

)

)

MASTER(MAS

)

METER

CONTROL

METER

CIRCUIT BOARDS

CONTENTS

MASOUT1 Circuit Board ......................................34

MASOUT2 Circuit Board.......................................35

MASOUT3 Circuit Board.......................................36

METER1 Circuit Board .........................................37

METER2 Circuit Board .........................................37

METER3 Circuit Board .........................................37

CTRL 1/5 Circuit Board ........................................38

CTRL 2/5 Circuit Board ........................................38

CTRL 3/5 Circuit Board ........................................38

CTRL 4/5 Circuit Board ........................................38

CTRL 5/5 Circuit Board ........................................38

IN1 Circuit Board ..................................................40

IN2 Circuit Board ..................................................42

IN3 Circuit Board ..................................................44

IN4 Circuit Board ..................................................46

IN JK Circuit Board ...............................................47

IN PAN Circuit Board ............................................47

ISRT 1/6 Circuit Board ..........................................48

ISRT 2/6 Circuit Board ..........................................49

ISRT 3/6 Circuit Board ..........................................49

ISRT 4/6 Circuit Board ..........................................48

ISRT 5/6 Circuit Board ..........................................48

ISRT 6/6 Circuit Board ..........................................48

MAS1 1/2 Circuit Board ........................................48

MAS1 2/2 Circuit Board ........................................48

MAS2 1/2 Circuit Board ........................................52

MAS2 2/2 Circuit Board ........................................52

MAS3 1/2 Circuit Board ........................................54

MAS3 2/2 Circuit Board ........................................54

MAS4 Circuit Board ..............................................56

MAS PAN Circuit Board ........................................56

ST1 Circuit Board .................................................57

ST2 Circuit Board .................................................58

ST3 Circuit Board .................................................59

ST4 Circuit Board .................................................60

STJK 1/2 Circuit Board .........................................60

STJK 2/2 Circuit Board .........................................60

M2500

Note : See parts list for details of circuit board component parts.

33

M2500

MASOUT1 Circuit Board

to METER1

-CN104

MATRIX OUT (5, 1)
AUX/GRP OUT (A11/G6, A7/G1)
GRP/AUX OUT (G5/A11, G1/A7)
AUX OUT (3)

CN321:

(AUX OUT 326)
MAS2-CN205
(AUX/GRP OUT A7/G1~A10/G4)
MAS2-CN206
(AUX/GRP OUT A11/G5~A14/G8)
MAS2-CN207
(GRP/AUX OUT G1/A7~G4/A10)
MAS3-CN308
(GRP/AUX OUT G5/A11~G8/A14)
MAS3-CN309
(MATRIX OUT 1~4)
MAS1-CN101
(MATRIX OUT 5~8)
MAS1-CN102

MATRIX OUT (6, 2)
AUX/GRP OUT (A12/G6, A8/G2)
GRP/AUX OUT (G6/A12, G2/A8)
AUX OUT (4)

MATRIX OUT (7, 3)
AUX/GRP OUT (A13/G7, A9/G3)
GRP/AUX OUT (G7/A13, G3/A9)
AUX OUT (5)

MATRIX OUT (8, 4)
AUX/GRP OUT (A14/G8, A10/G4)
GRP/AUX OUT (G8/A14, G4/A10)
AUX OUT (6)

Component side

34

Pattern side

MASOUT1 : 3NA-V230710 1

MASOUT2 Circuit Board

to MAS2

-CN204

M2500

AUX OUT

1

AUX OUT

2

Component side

MASOUT2 : 3NA-V230710 1

Pattern side

35

M2500

MASOUT3 Circuit Board

to MAS3-CN310 (ST OUT)
to MAS3-CN321 (MON1)

MONITOR OUT (L)
ST OUT (L)

to METER 2-1, 2-2-CN104

MONITOR OUT (MONO/C)
ST OUT (MONO/C)

MONITOR OUT (R)
ST OUT (R)

Component side

36

Pattern side

MASOUT3 : 3NA-V431500

METER1 Circuit Board

M2500

to METER

METER2-1 Circuit Board

to METER
NC

METER2-2 Circuit Board

MASOUT2-CN331

to MASOUT3

-CN331

to GOOSE NECKto MASOUT1

to ISRT
& METER

to GOOSE
NECK

to INSERT
to METER

Component side

Component side

Pattern side

Pattern side

to METER
NC

METER1: 3NA-V431480 2

METER2-1: 3NA-V431490 1
METER2-2: 3NA-V431490 1

to MASOUT3

-CN331

to ISRT
& METER

to GOOSE
& NECK

Component side

Pattern side

37

M2500

CTRL Circuit Board 1/5

CTRL Circuit Board 2/5

to CTRL5/5

-CN108

to MAS 2

-CN209

to MAS 2

-CN210

to ISRT

-CN409 to ISRT

to CTRL4/5

-CN106

-CN405

to CTRL4/5

-CN107

to ISRT

-CN406
N.C.

to ISRT

-CN404
N.C.

Component side

CTRL Circuit Board 3/5

Component side

CTRL Circuit Board 5/5

IN OUT THRU

MIDI

38

CTRL Circuit Board 4/5

Battery VN103500

VN103600(Battery holder for VN103500)

• Notice for back-up battery removal

Push the battery as shows in figure,

then the battery will pop up.

• Druk de batterij naar beneden zoals

aangeven in de tekening, de batterij
springt dan naar voren.

to CTRL1/5

-CN006

to CTRL1/5

-CN007

Component side

Component side

to CTRL1/5

-CN108

Component side

CTRL: 3NA-V431460 3

CTRL Circuit Board 2/5

CTRL Circuit Board 1/5

M2500

Pattern side

CTRL Circuit Board 5/5

Pattern side

CTRL Circuit Board 3/5

Pattern side

CTRL Circuit Board 4/5

Pattern side

Pattern side

39

M2500

to INJK-CN602

IN1 Circuit Board

to IN1-CN105
ISRT-CN212
NC

to IN2

-CN202

40

to INJK-CN601

to IN2

-CN201

to IN2-CN106
ISRT-CN314
NC

Component side

3NA-V431320 1

M2500

Pattern side

41

M2500

to IN1

-CN104

IN2 Circuit Board

to IN2-CN208
ISRT-CN203, 205
NC

to IN3

-CN302

42

to IN1

-CN103

to IN2-CN206
ISRT-CN301
NC

to IN2-CN207
ISRT-CN303, 305
NC

to IN3

-CN301

Component side

3NA-V431330 1

M2500

Pattern side

43

M2500

IN3 Circuit Board

to INPAN-CN501 to INPAN-CN502 to INPAN-CN503 to INPAN-CN504

to IN3-CN312
ISRT-CN306, 308
NC

CN303: to IN4-CN401
CN301: to IN2-CN203
CN304: to IN4-CN402

to IN3-CN314
ISRT-CN313
NC

to IN3-CN311
ISRT-CN206, 208
NC

CN305: to IN4-CN403
CN302: to IN2-CN204
CN306: to IN4-CN404

to IN3-CN313
ISRT-CN213
NC

to IN4-CN405

44

to IN4-CN408 to IN4-CN409

Component side

3NA-V431350 1

M2500

Pattern side

45

M2500

IN4 Circuit Board

to IN3-CN305 to IN3-CN305 to IN3-CN304 to IN3-CN303

to IN4-CN406
ISRT-CN401
NC

to IN4-CN410
ISRT-CN239
NC

to IN3-CN315

to IN3-CN317

to IN3-CN316

to IN4-CN407
ISRT-CN502
NC

to IN4-CN411
ISRT-CN315
NC

Component side

46

Pattern side

3NA-V431360 1