Alto DPA 2500 User manual

www.altoproaudio.com
Version2.0
MODEL: PS 4LA
MODEL:DPA 2500/4000

CONTENTS
1. Introduction…………………………………………………………….2
2. Specification…………………………………………………………....3
3. Schematic Diagram……………………………………………………4
4. Wiring Diagram………………………………………………………..17
5. PCB Layout…………………………………………………………….19
6. Test Procedure & Test Result………………………………………25
7. Exploded Views & Mechanical Part List………………………….30
8. BOM…………………..…………………………………………………33

2
1. Introduction
ALTO MISTRAL amplifiers are series of innovative design power amplifiers. This series work
under high stability with great power supply in just 2-rack spaces. Air flow is from back to front
panel to keep in a nice air circulation inside the Rack. The automatic fan, which affects machines’
temperature includes various kinds of speed, therefore, this low-noise fan makes a good result in
cooling the heat from machines.
MISTRAL amplifiers include 2 independent channels with separate protection system and
power supply. The independent protection system avoids opening circuit, short, wrong loading or
over-heating. The special-designed protective system applies automatically restarting functions
upon the default status and then goes back to normal.
All electronic inputs equip standard power connectors. And all inputs are electronic balanced,
with hi-quality transformer, MISTRAL amplifiers provide an outstanding performance in any
conditions.
zInnovative design and high stability power amplifiers.
zFan-cooled AB class high power amplifier in 19”rack, 2Usize
zRugged amplifiers in a strong, compact chassis.
z2 independent channels with separate protection system and power supply
zsmart-designed protection system for auto re-operation after fault.
zAuto-adjusting speed fan.
z4LEDs for operation/protection, limit, power on and clip
zHIGH-CURRENT TOROIDAL TRANSFORMER DESIGNED FOR HIGH POWER AT 2
Ohms with low noise.
zIndependent DC and thermal overload protection on each channel.
zIEC standard power connectors.
zBinding post and NEUTRIK® SPEAKON outputs power connectors.
zBalanced XLR inputs/ parallel outputs.

3
2. Specification
Output power DPA2500 DPA 4000
20Hz-20KHz @0.1% THD, SCD MODE
8Ohms per channel(EIAJ) 450W 625W
4Ohms per channel (EIAJ) 700W 1000W
Bridge MONO mode
8Ohms ,1KHz, 0.1% THD 1400W 2000W
Distortion (SMPTE-IM) <0.05%
Frequency response 20Hz-20KHz=/-0.1dB, -3dB points:10Hz-60Hz
Damping factor ,1 kHz and below >300 at 8 Ohms
Signal to noise ,20Hz`20KHz 102dB
Voltage Gain 40 Χ(32dB)
Input sensitivity @4Ohms 1Vrms
Input clipping 10Vrms(+22dB)
Input impedance 10kOhms unbalanced, 20k Ohms balanced 56(36dB)
Controls Front :AC switch ,CH1&CH2 Gain knobs
Rear :Limiter bridge selector
Indicators (1per channel)
Power-on : Blue LED
Operation/Protection: Dual Color(green/red LED)
Limit: Red LED
Clip: Red LED
Connectors, each channel
Input: Active balanced XLR
Parallel output: XLR
Output: NEUTRIK speaker and binding posts
Cooling Continuously variable-speed fan, rear-to front air flow
Load protection On/off muting, DC-fault load grounding relay, internal
fault fuses.
Power requirements 200-240(100-120)VAC 50-60Hz
Dimensions 19”(48.3cm) rack mounting, 3.5”(8.9cm) tall (2rackspaces)
15.9”(40cm)deep (rack mounting to rear support ears)
weight 18.1kg (Net) 20.5kg (Net)

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
C1_15
C1_16
1000uF/100V
C1_17
C1_18
C1_19
C1_20
C1_21
C1_22
C1_23
C1_24
C1_25
C1_26
12x1000uF/100V
R1_25
22R 1W
R1_28
0.22 5W
R1_29
0.22 5W
Q1_5 Q1_6
D1_9
1N4148
+83V_A
D1_15
1N5402
GND1
4xTR-93P(ALTO)
Q1_1
MJE15032
R1_23
1K 5W
R1_24
1K 5W
C1_40
22nF/100V poly
C1_13
3.3nF/50 cer
C1_14
3.3nF/50 cer
R1_62
5R6 1W
R1_22
5R6 1W
GND1
D1_13
1N4148
Q1_2
MJE15033
D1_14
1N4148
Q1_9 Q1_10 Q1_11 Q1_12
R1_32
22R 1W
R1_33
0.22 5W
R1_34
0.22 5W
R1_35
0.22 5W
R1_36
0.22 5W
GND1
-83V_A
D1_16
1N5402
D1_11
0R
D1_12
0R
D1_5
1N4936
D1_6
1N4936
C1_11
560pF/50 cer
C1_12
N/C
D1_7
ZD5V6 1/2W
R1_14
820R
R1_15
3K3 10W
R1_18
820R
R1_19
3K3 10W
D1_8
ZD5V6 1/2W
D1_10
1N4148
V1+
D1_1
ZD15V1.3W C1_8
220uF/25V
GND1
D1_2
W2 - 0 4
R1_9
100R
GND1
V1-
C1_7
56pF/50 cer
R1_8
10K
C1_10
27pF/50 cer
R1_11
15K SPEAKERS BUS
R1_10
330R
C1_9
0R
GND1
R1_6
4K7
R1_7 4K7
GND1
CH1 GAIN
C1_6
47uF/35V D1_4
ZD15V1.3W
C1_45
220uF/25V
GND1
RB1_1A
4x10K RB1_1B
4x10K
C1_3
100pF/50 cer
C1_5
47uF/35V
RB1_1C
4x10K
RB1_1D
4x10K
C1_4
100pF/50 cer
C1_2
22uF/50V
GND1
C1_1
22uF/50V
1
4
2
3
5
6
7
8
9
T1_1
FCT TAUD600
GND1
R1_17
NTC 50R
R1_16
TRIMMER 100R
R1_20
TRIMMER 1K
R1_21
TRIMMER 1K
3
21
U1_1A
NJM4560L
5
67
U1_1B
NJM4560L
84
U1_1C
NJM4580L
V1+
V1-
TP1_3
TP1_6
1
2
3
R1_5
3P-2.5
J1_4
3P2.5
J1_5
3P2.5
MIS25-CH1.Sch
Titel
Size
File:
Date:
Drawn By:
Sheet
RevisionModel No:
9-Apr-2004
KEVIN LIN.
ALTO MISTRAL2500-CH1 DRIVE
21of
MISTRAL2500 VER031212
A2
PCB# MIS4000.PCB
3
21
U1_2A
NJM4560L
5
67
U1_2B
NJM4560L
GND1
R1_53
8K2
R1_54
10K
C1_35
56pF/50 cer
84
U1_2C
NJM4580L
V1+
V1-
CH1 PI LOTLI M
R1_52
47R
D1_24
W2 - 0 4
2
1
3S1_1A
SW2C_2P
(CH1 LIMITER MODE)
GND1 R1_55
330R
C1_37
220uF/16V
41
2 3
U1_5
VTL5C2
GND1
R1_51
100K
GND1
C1_36
56pF/50 cer
GND1
(FTR VT90N1 VACTEC+)
1 2
3 4
5 6
7 8
910
JP1_16
HEADER 5X2
R1_57
100R
R1_56
82K 1/2W
R1_58
68K 1/2W
+83V_A
-83V_A
GND1
1 2
3 4
5 6
7 8
910
JP1_3
HEADER 5X2
GND1 GND1
CH1 INSERT CONNECTOR
2 1
D1_25
1N4004
V1+ 2 1
D1_26
1N4004
V1-
CH1 INSERT IN
CH1 INSERT OUT
2
1
3
J1_2
XLR MALE90
2
1
3
J1_1
XLR FEMALE90
CH1 INPUT
GND1
1 2
3 4
5 6
7 8
910
JP1_15
HEADER 5X2
GND1 GND1
5
4
6S1_1B
SWITCH 2C_2P
NORMAL
BRIDGED
TO USE ONLY CH2 PUT JUMPER ON PIN 6&8
CH1 CLIP+
OUTPUT STAGE_A 1 2
L1_1
2uH 10A
1 2
R1_39
5R6 2W
R1_40
12R 5W
R1_41
12R 5W
C1_31
68nF/250V poly
GND1
K1_1
RELAY VBS SERIES
D1_23
1N4004
GND1
CH1 OUTPUT
1
2
JP1_1
CN-PCB6. 3
1
2
JP1_2
CN-PCB6. 3
1+
1-
GND1
TO
SPEAKON PCB
CH1 OUTP UT
D1_19
W2 - 0 4
R1_44
6K8 1W
R1_43
100K
Q1_16
MPSA92
R1_42
330K
Q1_15
MPSA92
D1_17
5mm RED LED
R1_46
100K R1_47 47K
D1_18
ZD7V5 1/2W
Q1_17
MPSA42
R1_48
330K
D1_20
1N4004
TURN ON DELAY
C1_32
10uF/63
C1_33
47uF/63V
R1_45
1K5 C1_ 34
220uF/16V NP
D1_21 ZD36V 1W
R1_63
1K 3W
D1_22
1N4004
R1_50
PTC 65R
R1_49
10K 5W
+83V_A
100R/10K
GND1
CH1 BILED2
RELAY POWER1
CH1 BILED2
CH1 CLIP-
CH1 CLIP+
CH1 CLIP-
CH1 IN-
CH1 IN+
(PARALLEL OUTPUT)
-V_FAN_CH1
VAC FAN1-CH1
FAN OUT CH1
VAC FAN2-CH1
1
2
JP1_5
CN-PCB6. 3
1
2
JP1_6
CN-PCB6. 3
1
2
JP1_9
JEF-505
1
2
JP1_10
JEF-505
RECTIFIER BRIDGE1+
+83V_A
COM1
1
2
JP1_7
CN-PCB6. 3
1
2
JP1_8
CN-PCB6. 3
1
2
JP1_11
JEF-505
1
2
JP1_12
JEF-505
RECTIFIER BRIDGE1-
-83V_A
AC INPUT
1
2
3
JP1_13
HEADER 3
1
2
3
4
D1_27
W2 - 0 4
C1_42
470uF/35V
U1_4
LM317T
12 R1_1
1K8
R1_2
150R
C1_44
100nF/50 cer
C1_43
10uF/63
D1_28
1N4004
1
2
JP1_14
2P2.5
+12V
FAN
OUTPUT STAGE_A
RELAY POWER1
6.3x32 FUSE HOLDER
MISTRAL2500 Schematic Diagram 1 of 2
FUSE1-1
16AT
FUSE1-2
16AT
R1_3
NTC 100R
FAN OUT CH1
-V_FAN_CH1
VAC FAN1-CH1
VAC FAN2-CH1
ON/PROTECTION
(OPTION)
CH1 PHOTO COUPLER
-15V
+15V
CH1 BILED1
CH1 BILED1
GND1
R1_64
15K
CH1 BRIDGE SWITCH
CH2 AMPLIFIER
MIS25-CH2. SCH
(1.5A 200V)
(1.5A 200V)
(1.5A 200V)
(1.5A 200V)
4xTR-94N(ALTO)
R1_30
0.22 5W
R1_31
0.22 5W
Q1_7 Q1_8
R1_13
68R
C1_38
1.5nF/250 cer

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
C2_15
C2_16
1000uF/100V
C2_17
C2_18
C2_19
C2_20
C2_21
C2_22
C2_23
C2_24
C2_25
C2_26
12x1000uF/100V
R2_25
22R 1W
R2_28
0.22 5W
R2_29
0.22 5W
R2_30
0.22 5W
Q2_5
R2_31
0.22 5W
Q2_6
D2_9
1N4148
Q2_7
+83V_B
Q2_8
D2_15
1N5402
GND2
4xTR-93P(ALTO)
Q2_1
MJE15032
R2_23
1K 5W
R2_24
1K 5W
C2_40
22nF/100V poly
C2_13
3.3nF/50 cer
C2_14
3.3nF/50 cer
R2_62
5R6 1W
R2_22
5R6 1W
GND2
D2_13
1N4148
Q2_2
MJE15033
D2_14
1N4148
Q2_9 Q2_10 Q2_11 Q2_12
R2_32
22R 1W
R2_33
0.22 5W
R2_34
0.22 5W
R2_35
0.22 5W
R2_36
0.22 5W
GND2
-83V_B
D2_16
1N5402
D2_11
0R
D2_12
0R
D2_5
1N4936
D2_6
1N4936
C2_11
560pF/50 cer
C2_12
N/C
D2_7
ZD5V6 1/2W
R2_14
820R
R2_15
3K3 10W
R2_18
820R
R2_19
3K3 10W
D2_8
ZD5V6 1/2W
D2_10
1N4148
V2+
D2_1
ZD15V1.3W C2_8
220uF/25V
GND2
D2_2
W2 - 0 4
R2_9
100R
GND2
V2-
C2_7
56pF/50 cer
R2_8
10K
C2_10
27pF/50 cer
R2_11
15K SPEAKERS BUS
R2_10
330R
C2_9
0R
GND2
R2_6
4K7
R2_7 4K7
GND2
CH2 GAIN
C2_6
47uF/35V D2_4
ZD15V1.3W
C2_45
220uF/25V
GND2
RB2_1A
4x10K RB2_1B
4x10K
C2_3
100pF/50 cer
C2_5
47uF/35V
RB2_1C
4x10K
RB2_1D
4x10K
C2_4
100pF/50 cer
C2_2
22uF/50V
GND2
C2_1
22uF/50V
1
4
2
3
5
6
7
8
9
T2_1
FCT TAUD600
GND2
R2_17
NTC 50R
R2_16
TRIMMER 100R
R2_20
TRIMMER 1K
R2_21
TRIMMER 1K
3
21
U2_1A
NJM4560L
5
67
U2_1B
NJM4560L
84
U2_1C
NJM4580L
V2+
V2-
TP2_3
TP2_6
1
2
3
R2_5
3P-2.5
J2_4
3P2.5
J2_5
3P2.5
MIS25-CH2.Sch
Titel
Size
File:
Date:
Drawn By:
Sheet
RevisionModel No:
9-Apr-2004
KEVIN LIN.
ALTO MISTRAL2500-CH2 DRIVE
21of
MISTRAL2500 VER031212
A2
PCB# MIS4000.PCB
3
21
U2_2A
NJM4560L
5
67
U2_2B
NJM4560L
GND2
R2_53
8K2
R2_54
10K
C2_35
56pF/50 cer
84
U2_2C
NJM4580L
V2+
V2-
CH2 PI LOTLI M
R2_52
47R
D2_24
W2 - 0 4
2
1
3S2_1A
SW2C_2P
(CH1 LIMITER MODE)
GND2 R2_55
330R
C2_37
220uF/16V
41
2 3
U2_5
VTL5C2
GND2
R2_51
100K
GND2
C2_36
56pF/50 cer
GND2
(FTR VT90N1 VACTEC+)
1 2
3 4
5 6
7 8
910
JP2_16
HEADER 5X2
R2_57
100R
R2_56
82K 1/2W
R2_58
68K 1/2W
+83V_B
-83V_B
GND2
1 2
3 4
5 6
7 8
910
JP2_3
HEADER 5X2
GND2 GND2
CH2 INSERT CONNECTOR
2 1
D2_25
1N4004
V2+ 2 1
D2_26
1N4004
V2-
CH2 INSERT IN
CH2 INSERT OUT
2
1
3
J2_2
XLR MALE90
2
1
3
J2_1
XLR FEMALE90
CH2 INPUT
GND2
1 2
3 4
5 6
7 8
910
JP2_15
HEADER 5X2
GND2 GND2
5
4
6S2_1B
SWITCH 2C_2P
NORMAL
BRIDGED
TO USE ONLY CH2 PUT JUMPER ON PIN 6&8
CH2 CLIP+
OUTPUT STAGE_B 1 2
L2_1
2uH 10A
1 2
R2_39
5R6 2W
R2_40
12R 5W
R2_41
12R 5W
C2_31
68nF/250V poly
GND2
K2_1
RELAY VBS SERIES
D2_23
1N4004
GND2
CH2 OUTPUT
1
2
JP2_1
CN-PCB6. 3
1
2
JP2_2
CN-PCB6. 3
2+
2-
GND2
TO
SPEAKON PCB
CH2 OUTP UT
D2_19
W2 - 0 4
R2_44
6K8 1W
R2_43
100K
Q2_16
MPSA92
R2_42
330K
Q2_15
MPSA92
D2_17
5mm RED LED
R2_46
100K R2_47 47K
D2_18
ZD7V5 1/2W
Q2_17
MPSA42
R2_48
330K
D2_20
1N4004
TURN ON DELAY
C2_32
10uF/63
C2_33
47uF/63V
R2_45
1K5 C2_ 34
220uF/16V NP
D2_21 ZD36V 1W
R2_63
1K 3W
D2_22
1N4004
R2_50
PTC 65R
R2_49
10K 5W
+83V_B
100R/10K
GND2
CH2 BILED2
RELAY POWER2
CH2 BILED2
CH2 CLIP-
CH2 CLIP+
CH2 CLIP-
CH2 LIMITER MODE
CH2 IN-
CH2 IN+
(PARALLEL OUTPUT)
CH2 BRI DGE
-V_FAN_CH2
VAC FAN1
CH2 LIMITER MODE
FAN OUT CH2
VAC FAN2
1
2
JP2_5
CN-PCB6. 3
1
2
JP2_6
CN-PCB6. 3
1
2
JP2_9
JEF-505
1
2
JP2_10
JEF-505
RECTIFIER BRIDGE2+
+83V_B
COM2
1
2
JP2_7
CN-PCB6. 3
1
2
JP2_8
CN-PCB6. 3
1
2
JP2_11
JEF-505
1
2
JP2_12
JEF-505
RECTIFIER BRIDGE2-
-83V_B
AC INPUT
1
2
3
JP2_13
HEADER 3
1
2
3
4
D2_27
W2 - 0 4
C2_42
470uF/35V
U2_4
LM317T
12 R2_1
1K8
R2_2
150R
C2_44
100nF/50 cer
C2_43
10uF/63
D2_28
1N4004
1
2
JP2_14
2P2.5
+12V
FAN
OUTPUT STAGE_B
RELAY POWER2
6.3x32 FUSE HOLDER
MISTRAL2500 Schematic Diagram 2 of 2
FUSE2-1
16AT
FUSE2-2
16AT
R2_3
NTC 100R
FAN OUT CH2
-V_FAN_CH2
VAC FAN1
VAC FAN2
ON/PROTECTION
(OPTION)
CH2 PHOTO COUPLER
-15V
+15V
CH2 BILED1
CH2 BILED1
(1.5A 200V)
(1.5A 200V)
(1.5A 200V)
(1.5A 200V)
4xTR-94N(ALTO)
R2_13
68R
C2_38
1.5nF/250 cer

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
C1_15
C1_16
470uF/160V
C1_17
C1_18
C1_19
C1_20
C1_21
C1_22
C1_23
C1_24
C1_25
C1_26
16x470uF/160V
R1_25
22R 1W
R1_28
0.22 5W
R1_29
0.22 5W
R1_30
0.22 5W
R1_31
0.22 5W
Q1_5 Q1_6 Q1_7 Q1_8
D1_9
1N4148
+83V_A
D1_15
1N5402
GND1
5xTR-93P(ALTO)
Q1_1
MJE15032
R1_23
1K5 5W
R1_24
1K5 5W
C1_40
22nF/100V poly
C1_13
3.3nF/50 cer
C1_14
3.3nF/50 cer
R1_62
5R6 1W
R1_22
5R6 1W
GND1
D1_13
1N4148
Q1_2
MJE15033
D1_14
1N4148
Q1_9 Q1_10 Q1_11 Q1_12
R1_32
22R 1W
R1_33
0.22 5W
R1_34
0.22 5W
R1_35
0.22 5W
R1_36
0.22 5W
GND1
-83V_A
D1_16
1N5402
D1_11
0R
D1_12
0R
D1_5
1N4936
D1_6
1N4936
C1_11
560pF/50 cer
C1_12
N/C
D1_7
ZD5V6 1/2W
R1_14
820R
R1_15
4K8 10W
R1_18
820R
R1_19
4K8 10W
D1_8
ZD5V6 1/2W
D1_10
1N4148
V1+
D1_1
ZD15V1.3W C1_8
220uF/25V
GND1
D1_2
W2 - 0 4
R1_9
100R
GND1
V1-
C1_7
56pF/50 cer
R1_8
10K
C1_10
27pF/50 cer
R1_11
15K SPEAKERS BUS
R1_10
330R
C1_9
0R
GND1
R1_6
4K7
R1_7 4K7
GND1
CH1 GAIN
C1_6
47uF/35V D1_4
ZD15V1.3W
C1_45
220uF/25V
GND1
RB1_1A
4x10K RB1_1B
4x10K
C1_3
100pF/50 cer
C1_5
47uF/35V
RB1_1C
4x10K
RB1_1D
4x10K
C1_4
100pF/50 cer
C1_2
22uF/50V
GND1
C1_1
22uF/50V
1
4
2
3
5
6
7
8
9
T1_1
FCT TAUD600
GND1
R1_17
NTC 50R
R1_16
TRIMMER 100R
R1_20
TRIMMER 2K2
R1_21
TRIMMER 2K2
3
21
U1_1A
NJM4560L
5
67
U1_1B
NJM4560L
84
U1_1C
NJM4580L
V1+
V1-
TP1_3
TP1_6
1
2
3
R1_5
3P-2.5
J1_4
3P2.5
J1_5
3P2.5
MIS40-CH1.Sch
Titel
Size
File:
Date:
Drawn By:
Sheet
RevisionModel No:
9-Apr-2004
KEVIN LIN.
ALTO MISTRAL4000-CH1 DRIVE
21of
MISTRAL4000 VER031212
A2
PCB# MIS4000.PCB
3
21
U1_2A
NJM4560L
5
67
U1_2B
NJM4560L
GND1
R1_53
8K2
R1_54
10K
C1_35
56pF/50 cer
84
U1_2C
NJM4580L
V1+
V1-
CH1 PI LOTLI M
R1_52
47R
D1_24
W2 - 0 4
2
1
3S1_1A
SW2C_2P
(CH1 LIMITER MODE)
GND1 R1_55
330R
C1_37
220uF/16V
41
2 3
U1_5
VTL5C2
GND1
R1_51
100K
GND1
C1_36
56pF/50 cer
GND1
(FTR VT90N1 VACTEC+)
1 2
3 4
5 6
7 8
910
JP1_16
HEADER 5X2
R1_57
100R
R1_56
82K 1/2W
R1_58
68K 1/2W
+83V_A
-83V_A
GND1
1 2
3 4
5 6
7 8
910
JP1_3
HEADER 5X2
GND1 GND1
CH1 INSERT CONNECTOR
2 1
D1_25
1N4004
V1+ 2 1
D1_26
1N4004
V1-
CH1 INSERT IN
CH1 INSERT OUT
2
1
3
J1_2
XLR MALE90
2
1
3
J1_1
XLR FEMALE90
CH1 INPUT
GND1
1 2
3 4
5 6
7 8
910
JP1_15
HEADER 5X2
GND1 GND1
5
4
6S1_1B
SWITCH 2C_2P
NORMAL
BRIDGED
TO USE ONLY CH2 PUT JUMPER ON PIN 6&8
CH1 CLIP+
OUTPUT STAGE_A 1 2
L1_1
2uH 10A
1 2
R1_39
5R6 2W
R1_40
12R 5W
R1_41
12R 5W
C1_31
68nF/250V poly
GND1
K1_1
RELAY VBS SERIES
D1_23
1N4004
GND1
CH1 OUTPUT
1
2
JP1_1
CN-PCB6. 3
1
2
JP1_2
CN-PCB6. 3
1+
1-
GND1
TO
SPEAKON PCB
CH1 OUTP UT
D1_19
W2 - 0 4
R1_44
6K8 1W
R1_43
100K
Q1_16
MPSA92
R1_42
330K
Q1_15
MPSA92
D1_17
5mm RED LED
R1_46
100K R1_47 47K
D1_18
ZD7V5 1/2W
Q1_17
MPSA42
R1_48
330K
D1_20
1N4004
TURN ON DELAY
C1_32
10uF/63
C1_33
47uF/63V
R1_45
1K5 C1_ 34
220uF/16V NP
D1_21 ZD36V 1W
R1_63
1K 3W
D1_22
1N4004
R1_50
PTC 65R
R1_49
10K 5W
+83V_A
100R/10K
GND1
CH1 BILED2
RELAY POWER1
CH1 BILED2
CH1 CLIP-
CH1 CLIP+
CH1 CLIP-
CH1 IN-
CH1 IN+
(PARALLEL OUTPUT)
-V_FAN_CH1
VAC FAN1-CH1
FAN OUT CH1
VAC FAN2-CH1
1
2
JP1_5
CN-PCB6. 3
1
2
JP1_6
CN-PCB6. 3
1
2
JP1_9
JEF-505
1
2
JP1_10
JEF-505
RECTIFIER BRIDGE1+
+83V_A
COM1
1
2
JP1_7
CN-PCB6. 3
1
2
JP1_8
CN-PCB6. 3
1
2
JP1_11
JEF-505
1
2
JP1_12
JEF-505
RECTIFIER BRIDGE1-
-83V_A
AC INPUT
1
2
3
JP1_13
HEADER 3
1
2
3
4
D1_27
W2 - 0 4
C1_42
470uF/35V
U1_4
LM317T
12 R1_1
1K8
R1_2
150R
C1_44
100nF/50 cer
C1_43
10uF/63
D1_28
1N4004
1
2
JP1_14
2P2.5
+12V
FAN
OUTPUT STAGE_A
RELAY POWER1
6.3x32 FUSE HOLDER
MISTRAL4000 Schematic Diagram 1 of 2
FUSE1-1
10AT
FUSE1-2
10AT
R1_3
NTC 100R
FAN OUT CH1
-V_FAN_CH1
VAC FAN1-CH1
VAC FAN2-CH1
ON/PROTECTION
(OPTION)
CH1 PHOTO COUPLER
-15V
+15V
CH1 BILED1
CH1 BILED1
GND1
R1_64
15K
CH1 BRIDGE SWITCH
CH2 AMPLIFIER
MIS40-CH2. SCH
(1.5A 200V)
(1.5A 200V)
(1.5A 200V)
(1.5A 200V)
5xTR-94N(ALTO)
R1_27
0.22 5W
Q2_4
Q1_13
R2_37
0.22 5W
C1_28 C1_30
C1_27 C1_29
R1_13
68R
C1_38
1.5nF/250 cer
R1_26
0.22 5W
Q2_3
Q1_14
R2_38
0.22 5W

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
C2_15
C2_16
470uF/160V
C2_17
C2_18
C2_19
C2_20
C2_21
C2_22
C2_23
C2_24
C2_25
C2_26
12x470uF/160V
R2_25
22R 1W
R2_28
0.22 5W
R2_29
0.22 5W
R2_30
0.22 5W
R2_31
0.22 5W
Q2_5 Q2_6 Q2_7 Q2_8
D2_9
1N4148
+83V_B
D2_15
1N5402
GND2
5xTR-93P(ALTO)
Q2_1
MJE15032
R2_23
1K5 5W
R2_24
1K5 5W
C2_40
22nF/100V poly
C2_13
3.3nF/50 cer
C2_14
3.3nF/50 cer
R2_62
5R6 1W
R2_22
5R6 1W
GND2
D2_13
1N4148
Q2_2
MJE15033
D2_14
1N4148
Q2_9 Q2_10 Q2_11 Q2_12
R2_32
22R 1W
R2_33
0.22 5W
R2_34
0.22 5W
R2_35
0.22 5W
R2_36
0.22 5W
GND2
-83V_B
D2_16
1N5402
D2_11
0R
D2_12
0R
D2_5
1N4936
D2_6
1N4936
C2_11
560pF/50 cer
C2_12
N/C
D2_7
ZD5V6 1/2W
R2_14
820R
R2_15
4K8 10W
R2_18
820R
R2_19
4K8 10W
D2_8
ZD5V6 1/2W
D2_10
1N4148
V2+
D2_1
ZD15V1.3W C2_8
220uF/25V
GND2
D2_2
W2 - 0 4
R2_9
100R
GND2
V2-
C2_7
56pF/50 cer
R2_8
10K
C2_10
27pF/50 cer
R2_11
15K SPEAKERS BUS
R2_10
330R
C2_9
0R
GND2
R2_6
4K7
R2_7 4K7
GND2
CH2 GAIN
C2_6
47uF/35V D2_4
ZD15V1.3W
C2_45
220uF/25V
GND2
RB2_1A
4x10K RB2_1B
4x10K
C2_3
100pF/50 cer
C2_5
47uF/35V
RB2_1C
4x10K
RB2_1D
4x10K
C2_4
100pF/50 cer
C2_2
22uF/50V
GND2
C2_1
22uF/50V
1
4
2
3
5
6
7
8
9
T2_1
FCT TAUD600
GND2
R2_17
NTC 50R
R2_16
TRIMMER 100R
R2_20
TRIMMER 2K2
R2_21
TRIMMER 2K2
3
21
U2_1A
NJM4560L
5
67
U2_1B
NJM4560L
84
U2_1C
NJM4580L
V2+
V2-
TP2_3
TP2_6
1
2
3
R2_5
3P-2.5
J2_4
3P2.5
J2_5
3P2.5
MIS40-CH2.Sch
Titel
Size
File:
Date:
Drawn By:
Sheet
RevisionModel No:
9-Apr-2004
KEVIN LIN.
ALTO MISTRAL4000-CH2 DRIVE
21of
MISTRAL4000 VER031212
A2
PCB# MIS4000.PCB
3
21
U2_2A
NJM4560L
5
67
U2_2B
NJM4560L
GND2
R2_53
8K2
R2_54
10K
C2_35
56pF/50 cer
84
U2_2C
NJM4580L
V2+
V2-
CH2 PI LOTLI M
R2_52
47R
D2_24
W2 - 0 4
2
1
3S2_1A
SW2C_2P
(CH1 LIMITER MODE)
GND2 R2_55
330R
C2_37
220uF/16V
41
2 3
U2_5
VTL5C2
GND2
R2_51
100K
GND2
C2_36
56pF/50 cer
GND2
(FTR VT90N1 VACTEC+)
1 2
3 4
5 6
7 8
910
JP2_16
HEADER 5X2
R2_57
100R
R2_56
82K 1/2W
R2_58
68K 1/2W
+83V_B
-83V_B
GND2
1 2
3 4
5 6
7 8
910
JP2_3
HEADER 5X2
GND2 GND2
CH2 INSERT CONNECTOR
2 1
D2_25
1N4004
V2+ 2 1
D2_26
1N4004
V2-
CH2 INSERT IN
CH2 INSERT OUT
2
1
3
J2_2
XLR MALE90
2
1
3
J2_1
XLR FEMALE90
CH2 INPUT
GND2
1 2
3 4
5 6
7 8
910
JP2_15
HEADER 5X2
GND2 GND2
5
4
6S2_1B
SWITCH 2C_2P
NORMAL
BRIDGED
TO USE ONLY CH2 PUT JUMPER ON PIN 6&8
CH2 CLIP+
OUTPUT STAGE_B 1 2
L2_1
2uH 10A
1 2
R2_39
5R6 2W
R2_40
12R 5W
R2_41
12R 5W
C2_31
68nF/250V poly
GND2
K2_1
RELAY VBS SERIES
D2_23
1N4004
GND2
CH2 OUTPUT
1
2
JP2_1
CN-PCB6. 3
1
2
JP2_2
CN-PCB6. 3
2+
2-
GND2
TO
SPEAKON PCB
CH2 OUTP UT
D2_19
W2 - 0 4
R2_44
6K8 1W
R2_43
100K
Q2_16
MPSA92
R2_42
330K
Q2_15
MPSA92
D2_17
5mm RED LED
R2_46
100K R2_47 47K
D2_18
ZD7V5 1/2W
Q2_17
MPSA42
R2_48
330K
D2_20
1N4004
TURN ON DELAY
C2_32
10uF/63
C2_33
47uF/63V
R2_45
1K5 C2_ 34
220uF/16V NP
D2_21 ZD36V 1W
R2_63
1K 3W
D2_22
1N4004
R2_50
PTC 65R
R2_49
10K 5W
+83V_B
100R/10K
GND2
CH2 BILED2
RELAY POWER2
CH2 BILED2
CH2 CLIP-
CH2 CLIP+
CH2 CLIP-
CH2 LIMITER MODE
CH2 IN-
CH2 IN+
(PARALLEL OUTPUT)
CH2 BRI DGE
-V_FAN_CH2
VAC FAN1
CH2 LIMITER MODE
FAN OUT CH2
VAC FAN2
1
2
JP2_5
CN-PCB6. 3
1
2
JP2_6
CN-PCB6. 3
1
2
JP2_9
JEF-505
1
2
JP2_10
JEF-505
RECTIFIER BRIDGE2+
+83V_B
COM2
1
2
JP2_7
CN-PCB6. 3
1
2
JP2_8
CN-PCB6. 3
1
2
JP2_11
JEF-505
1
2
JP2_12
JEF-505
RECTIFIER BRIDGE2-
-83V_B
AC INPUT
1
2
3
JP2_13
HEADER 3
1
2
3
4
D2_27
W2 - 0 4
C2_42
470uF/35V
U2_4
LM317T
12 R2_1
1K8
R2_2
150R
C2_44
100nF/50 cer
C2_43
10uF/63
D2_28
1N4004
1
2
JP2_14
2P2.5
+12V
FAN
OUTPUT STAGE_B
RELAY POWER2
6.3x32 FUSE HOLDER
MISTRAL4000 Schematic Diagram 2 of 2
FUSE2-1
10AT
FUSE2-2
10AT
R2_3
NTC 100R
FAN OUT CH2
-V_FAN_CH2
VAC FAN1
VAC FAN2
ON/PROTECTION
(OPTION)
CH2 PHOTO COUPLER
-15V
+15V
CH2 BILED1
CH2 BILED1
(1.5A 200V)
(1.5A 200V)
(1.5A 200V)
(1.5A 200V)
5xTR-94N(ALTO)
R2_27
0.22 5W
Q2_4
Q2_13
R2_37
0.22 5W
C2_28 C2_30
C2_27 C2_29
R2_13
68R
C2_38
1.5nF/250 cer
Q2_14
R2_38
0.22 5W
R2_26
0.22 5W
Q2_3

1 2 34
A B C D
4
321
D
C B A
1 2
D2_30
3mm YELLOW LED
1 2
D2_3
3mm RED LED
1 2
D2_29
3mm BLUE LED
1 2 3 4 5 6 7 8 910
JP2_22
HEADER 5X2
LIMITER
CLIP
ON/PROTECTION
RED GREEN
1
122
D2_1 3mm R/G BLCOL LED
POWER ON
1 2
D1_30
3mm YELLOW LED
1 2
D1_3
3mm RED LED
1 2
D1_29
3mm BLUE LED
1 2 3 4 5 6 7 8 910
JP1_22
HEADER 5X2
LIMITER
CLIP
ON/PROTECTION
RED GREEN
1
122
D1_1
3mm R/G BLCOL LED
POWER ON
VR1_1 B50K VR2_1 B50K
1 2 3
CN1_1 3P2.5
1 2 3
CN2_1 3P2.5
MIS40FP.Sch
Titel Size File: Date:
Drawn By: Sheet
RevisionModel No:
9-Apr-2004
C.C.LIN
ALTO : MISTRAL4000 FP
11of
MISTRAL4000 VER030710
A4

1 2 34
A B C D
4
321
D
C B A
PJ1 PHONEJACK2
1 2 3
CN1 CON3
1 2 3
CN3 CON3 1
2 3 4 5
CN4 CON5
1 2 3
CN2 CON3
MIS40IN.Sch
Titel Size File: Date:
Drawn By: Sheet
RevisionModel No:
9-Apr-2004
C.C.LIN
ALTO : MISTRAL4000 INPUT
11of
MISTRAL4000 VER031206
A4

1 2 3 4
A B C D
4
321
D
C B A
R2_67 12R 5W R2_68 12R 5W
R2_69 12R 5W R2_70 12R 5W
R2_71 12R 5W R2_72 12R 5W
R2_73 2K7 5W
R2_74 2K7 5W
D2_31
1N4004
12
C2_46 470uF/35V
LINE
NEUT
GND
IEC AC INLET
CIRCUIT BREAKER USA:15A-125V EUROPE:8A-230V
POWER SWITCH
1. COMPONENTS WITH ARE SAFETY CRITICAL PARTS.
63V 63V 0V 63V 63V 0V
13.5V
0V
115V or 120V
115V or 120V
0V 0V
T130℃ T130℃
PT-MIS4000-E
1 2
P1
CN-PCB6.3
1 2
P2
CN-PCB6.3
1 2
P8 CN-PCB6.3
1 2
P3
CN-PCB6.3
1 2
P4
CN-PCB6.3
1 2
P7 CN-PCB6.3
1 2
P5
CN-PCB6.3
1 2
P6
CN-PCB6.3
1 2 3 4 5 6 7 8
K2_2 RELAY-2-24
TRANS-IN
TRANS-IN
NEUTRAL SWITCH
BD1 35A/200V BD2 35A/200V
COM1 COM2
BRIDGE1+ BRIDGE1- BRIDGE2+ BRIDGE2-
AC_1 (AC_2)
COM
MIS40PWR.Sch
Titel Size File: Date:
Drawn By: Sheet
RevisionModel No:
9-Apr-2004
KEVIN LIN
ALTO MISTRAL4000 POWER BOARD
11of
MISTRAL4000 VER030504
A4
PCB# MIS40PWR.PCB
NEUTRAL

1 2 34
A B C D
4
321
D
C B A
R1 4K7
R2 4K7
R3 10K
R4 10K
R5 10K
R6 10K
R7 10K
R8 10K
C1 100N
C2 10uF/16V
TR1 BC560
TR2 BC560
DL1
VOLUME
DL4
HUM CANCEL
DL5
NOISE GATE
DL6
MULTICOMP
DL7
PRESETS
DL8
EDIT
DL9
CH SEL
DL10
COMM
DL11 SIGNAL
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN1 CN-HD7X2
GND 1
2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
CN2 CN-HD10X2
GND
+5VD
SW1 UP
SW2 ENTER
SW3 DOWN
SW4 SELECT
+5VD
GND
RED GR
GND
+5VD
+5VD
1
2
3
4
5
CN3 CON5
1
2
3
4
5
CN4 CON5
DPA-DIS.Sch
Titel Size File: Date:
Drawn By: Sheet
RevisionModel No:
12-Apr-2004
C.C.LIN
ALTO : DPA4000 Display Board 1
11of
DPA4000 VER030728
A4

1 2 34
A B C D
4
321
D
C B A
g
10 f
9
A1 3
e
1d
2
dp
5
c
4
A2 8
b
6a
7
DL2 LED-7SEG-2
g
10 f
9
A1 3
e
1d
2
dp
5
c
4
A2 8
b
6a
7
DL3 LED-7SEG-2
1
2
3
4
5
CN1 CON5
1
2
3
4
5
CN2 CON5
DPA-DIS2.Sch
Titel Size File: Date:
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RevisionModel No:
12-Apr-2004
C.C.LIN
ALTO : DPA4000 Display Board 2
11of
DPA4000 VER030728
A4

12345678
A B C D
8
7654321
D
C B A
C2
22P
C4
22P
R2 750R R4 750R
C1 10/16 C3 10/16
R1 10K R3 10K
C5
22P
C6
22P
R6 10K R8 10K
R5 2K2 R7 2K2
AGND
AGND AGND
AGND AGND
C7 100N
R9 1K
Q2 BR15
R10 10K
R11 10K
GND
GND
R12 1K5
R13 1K5 R14
1K5
R15 1K5 R17 1K5
R16 1K5
R18 1K5 R19
1K5
R21 1K5
R20 1K5
GND
R22 1K5 R24 1K5 R26 1K5 R28 1K5
R23 1K5 R25 1K5 R27 1K5 R29 1K5
GND
RELE
1 2 3 4 5 6
CN3 CN-6P-90
C8 1000/25 C9 1000/25
Vin
GND
Vout
U3 7805
Vin
GND
Vout
U4 7905
C10 10/16 C11 10/16
C12 100N C13 100N
GND
1 6 2 7 3 8 4 5
J1 D8
1 3 5 7 9
11 13
2 14 4 10 6 12 8
15 17 19
18 20 16
J2
1 3 5 7 9 11 13
2
14
4
10
6
12
8
15 17 19
18 20 16
J3
1 6 2 3 4 5
J7
1 3 5 7
2
9
11 13
12 8 4 14 10 6
J4
1 3 5 7
2
9 11 13
12
8 4
14 10
6
J5
GND
1 6 2 7 3 8 4 5
J6
RELE
C14 100N C15 100N
AGND
TO Display Board
TO Display Board
TO DSP Board
TO DSP Board
TO DSP Board
TO DSP Board
TO DSP Board
TO AMP Board
TO RS-XXX Board
1 2 3 4 5 6 7 8 910
CN1 HEADER 5X2
3 2
1
U1A
MC33078
5 6
7
U1B
MC33078
4 8
U1C
MC33078
3 2
1
U2A MC33078
5 6
7
U2B MC33078
4 8
U2C
MC33078
+5VD
+5VD
+5VD
RL1 RELAY-2-24
AGND AGND
D1 1N4148
+5VD -5VD
-5VD
+5VD
GND
1 2 3
CN2 CON3
GND
GND
-5VD
+5VD
D5 SF1B D2 SF1B
D3 SF1B D4 SF1B
DPA-PWR.Sch
Titel Size File: Date:
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RevisionModel No:
12-Apr-2004
C.C.LIN
ALTO : DPA4000 -DSP_PWR
11of
DPA4000 VER030728
A4

1 2 34
A B C D
4
321
D
C B A
11 14
T
IC2A
MAX202E
10 7
T
IC2B MAX202E
1312 R
IC2C
MAX202E
98 R
IC2D MAX202E
13
16
6
45
2
15
IC2E MAX202E
C1 100N
C2 100N
C4 100N
C5 100N
C6 100N
C7 100N
C8 100N
C3 47u/16V
1 2 3 4 5 6 7 8
CN2 CN-HD4X2
DGND
+5VD
2 1 3 4
S2 RS485
2 1 3 4
S1 RS485-LINK
R1R2
R3 10R0 R4 10R0
L1 INDU1 L2 INDU1
L3 INDU1
L4 INDU1 L5 INDU1
6 74
3 1 2Re
Ro De
Di
TRANSCEIVER
IC1A MAX485E
85
IC1B MAX485E
D1 1N4740/6V8/1W
D2
1N4740/6V8/1W
D3 1N4740/6V8/1W
D4
1N4740/6V8/1W
DGND
DGND
+5VD+5VD
S3 TP-2
12 34 56 78 910
CN1 HEADER 5X2
DPA-RS.Sch
Titel Size File: Date:
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RevisionModel No:
12-Apr-2004
C.C.LIN
ALTO : DPA4000 RS_BOARD
11of
DPA4000 VER030728
A4

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
DPA2500/4000 Chassis Wiring Drawing (100V-130V)
JP2_1
JP2_2
JP2_13
JP2_14
JP2_7
R2_5
JP2_5
JP2_6
JP2_8
JP1_5
JP1_6
JP1_8
JP1_1
JP1_2
JP1_13
JP1_14
JP1_7
R1_5
OUT1GND1OUT2GND2
P2
P1
P3
P4
P5
P6
P7
AC
AC
AC
AC
(COM2)
P8
PT-DPA4000-E (BRIDGE+)
(AC_2)
(COM1)
(BRIDGE+)
(AC_1)
(GND1)
(CH1_OUT)
(GND2)
(CH2_OUT)
CN1_1 CN2_1
JP1_16 JP2_16
JP1_22 JP2_22
RED
BLACK
YELLOW
WHITE
WHITE
WHITE
RED
GREEN
PURPLE
PURPLE
BLACK
BLUE
GRAY
GRAY
HA01258
HA02471
HA01239
HA01237
HA02469
HA02470
HA02451
HA02450
HA01321
HA01243
HA01244
HA02488
HA01198
HA02449
HA01333
HA01247
CN2
J6
J2
J4
CN1CN2

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
DPA2500/4000 Chassis Wiring Drawing (210V-240V)
JP2_1
JP2_2
JP2_13
JP2_14
JP2_7
R2_5
JP2_5
JP2_6
JP2_8
JP1_5
JP1_6
JP1_8
JP1_1
JP1_2
JP1_13
JP1_14
JP1_7
R1_5
OUT1GND1OUT2GND2
P2
P1
P3
P4
P5
P6
P7
AC
AC
AC
AC
(COM2)
P8
PT-DPA4000-E (BRIDGE+)
(AC_2)
(COM1)
(BRIDGE+)
(AC_1)
(GND1)
(CH1_OUT)
(GND2)
(CH2_OUT)
CN1_1 CN2_1
JP1_16 JP2_16
JP1_22 JP2_22
RED
BLACK
YELLOW
WHITE
WHITE
WHITE
RED
GREEN
PURPLE
PURPLE
BLACK
BLUE
GRAY
GRAY
HA01258
HA02471
HA01239
HA01237
HA02469
HA02470
HA02451
HA02450
HA01321
HA01243
HA01244
HA02488
HA01198
HA02449
HA01333
HA01247
CN2
J6
J2
J4
CN1CN2

5.PCB Layout
MIS40 FP2