Alto DPA-900, DPA-1500 Service Manual
MODEL: DPA 900/1500
www.altoproaudio.com
Version 2.0
CONTENT
1. Introduction………………………………………………....................2
2. Specification……………………………………………………………3
3. Schematic Diagram……………………………………………………4
4. PCB Layout…………………………………………………………….13
5. Test Procedure & Test Result……………………………………....18
6. Exploded Views & Mechanical Parts List………………………...23
7. BOM………………………………………………………………...…...26
1
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.
z Innovative design and high stability power amplifiers.
z Fan-cooled AB class high power amplifier in 19”rack, 2Usize
z Rugged amplifiers in a strong, compact chassis.
z 2 independent channels with separate protection system and power supply
z smart-designed protection system for auto re-operation after fault.
z Auto-adjusting speed fan.
z 4LEDs for operation/protection, limit, power on and clip
z HIGH-CURRENT TOROIDAL TRANSFORMER DESIGNED FOR HIGH POWER AT 2
Ohms with low noise.
z Independent DC and thermal overload protection on each channel.
z IEC standard power connectors.
z Binding post and NEUTRIK® SPEAKON outputs power connectors.
z Balanced XLR inputs/ parallel outputs.
2
2. Specification
Output Power DPA 900 DPA 1500
20Hz-20KHz @0.1% THD, SCD MODE
8Ohms per channel(EIAJ) 190W 300W
4Ohms per channel (EIAJ) 300W 500W
Bridge MONO mode
8Ohms ,1KHz, 0.1% THD 600W 1000W
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
Power-on : Blue LED
Indicators (1per channel)
Operation/Protection: Dual Color(green/red LED)
Limit: Red LED
Clip: Red LED
Input: Active balanced XLR
Connectors, each channel
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 12.9kg (Net) 14.8kg (Net)
3
)
7654321
8
U2A
R1_32
100R
1
2
J1 6
2
2
1
1
CON2
1 2
3
2
1
GND1
2
12
1
(1.5A 200V)
4
CH1 I NSE RT OUT
CH1 INSERT IN
OPERATING LED
R1_25
CH1_LIM_SW2
47R
CH1 LIM SW1
D1_9
D1_21
3mm YELLOW LED
4
W2 -0 4
(1.5A 200V)
(FTR VT90N1 VACTEC+)
CH1 PHOTO COUPLER
3
D1_20
W2 -0 4
+1G
C1_27
47uF/25V
R1_29
3P-2.5
3
2
1
CH1 GAIN
Vic+
12
R1_33
3K3 1/2W
12
Vic-
U1_2
VTL5C2
3
4
3
1
R1_31
4K7
12
3
12
2
1
GND1
2
1
2
GND1
R1_3
10K
1 2
R1_30
4K7
12
2
D1_16
3mm GREEN LED
1 2
56pF/50 cer
6
5
U1_1B
NJM4580L
2 1
Vic-
R1_5
CH1 BRIDGE SWIT CH
AC1
V+
GND
V-
D1_6
1N4148
Vic+
ZD15V1.3W
C1_5
ZD15V1.3W
D1_7
1N4148
12
330R
12
GND1
J1 7
CN-P CB6. 3
J1_8
CN-P CB6. 3
J1 9
CN-P CB6. 3
J1_10
CN-P CB6. 3
+15V
1
21
1
K
+
D1_3
7
C1_10
22nF/50 cer
D1_8
-15V
1 2
R1_6
1 2
C1_6
47uF/16NP
3
3
2
2
1
1
3
3
2
2
1
1
3
3
2
2
1
1
3
3
2
2
1
1
G
2
2
C1_8
220uF/25V
GND1
C1_14
12
3.3nF/100 poly
C1_9
2.2nF/50 cer
1 2
12
1 2
R1_8
NTC 50R
GND1
C1_4
220uF/25V
1
1
K
+
G
2
2
C1_7
27pF/50 cer
12K SPEAKERS BUS
12
R1_37
12K
OUTPUT 1
12
R1_11
1K5 2W
12
R1_9
820R
1
D1_13
K
ZD5V6 1/2W
2
2
D1_11
K
1N4937
1
2
D1_12
K
A
1N4937
1
3
3
R1_16
2
2
1
1
1
D1_14
K
ZD5V6 1/2W
2
12
R1_10
820R
R1_12
1K5 2W
1 2
F1_1
1 2
5A
F1_2
1 2
5A
TRIMMER 100R
Vic+
84
Vic-
R1_15
1 2
150R
12
R1_7
330R
12
R1_4
330R
Q1_2
MJE15031
U1_1C
NJM4580L
+73V_A
-73V_A
Q1_1
MJE15030
B
R1_17
4R7 1W
R1_18
4R7 1W
B
D1_2
1N4004
2 1
12
R1_13
22R 1W
0 2A
CE
12
12
EC
0 2A
R1_14
22R 1W
1 2
12
EC
B
Q1_3
C1_11
3.3nF/50 cer
1 2
C1_12
3.3nF/50 cer
1 2
CE
B
Q1_4
1 2
R1_36
120K
1 2
5mm RED LED
GND1
R1_19
0.1R 3W
2xMJL21193
22nF/100V poly
GND1
2 1
R1_20
0.1R 3W
+15V
84
U2C
NJM4580L
-15V
12
C1_1
47uF/100V
GND1
D1_4
D1_19
1N4148
C1_13
1 2
D1_10
1N4148
R1_39
PTC 65R
100R
10K
GND1
21
12
1
A
K
2
1
K
2
6A
D1_15
1N4004
R1_21
1 2
470R 3W
GND1
D1_17
1N4004
6A
D1_5
ZD15V1.3W
12
2 1
R1_38
10K
12
R1_34
47K
+73V_A
1
C1_15
+
G
4700uF/80V
2
R1_26
5R6 2W
1 2
L1_1
1 2
R1_35
100K
EC
Q1_5
MPSA92
R1_40
6K8
1 2
11A
GND1
B
CE
2uH 10A
Vic+
Q1_6
MPSA42
Vic-
12
12
GND1
OUTPUT 1 OUTPUT1
1
C1_16
+
G
4700uF/80V
2
-73V_A
1 2
B
R1_22
10R 3W
C1_2
100nF/250V poly
GND1
Pout=418W RMS @ 4 Ohm
J1 5
1
1
1+
2
2
3
3
CN-P CB6. 3
CH1 OUTPUT
TO
SPEAKON PCB
J1_4
1
1
1-
2
2
3
3
CN-P CB6. 3
D
C
B
A
R1_41
1 2
D
3mm RED LED
C
C1_24
10uF/50V
R1_1
2
1
CH1 IN-
CH1 IN
B
A
1 2
G
10K
R1_2
1
2
1 2
+
10K
C1_23
10uF/50V
C1_3
100pF/50 cer
CH1 IN
CH1 IN-
CH1 BRIDGE SWITCH CH2 BRIDGE
CH1 LIM SW1
CH1 LIM SW2
GND1 GND1
for PBM8
R1_42
4K7 1/8W
1 2
D1_18
CLIP
2
3
12
12
R1_28
10K
GND1
GND1
J4
112
334
556
7 8
9910
111112
131314
HEADER 7X2
J1_11
2
1
CON2
J2_11
2
1
CON2
GND1
4K7 1/8W
2
3
GND1
12
GND1
C1_25
100pF/50 cer
1 2
R1_27
1 2
10K
U1_1A
NJM4580L
2
CH2_LIM_SW1
4
CH2_LIM_SW2
6
8
10
12
14
CH1 IN
CH2 IN
NJM4580L
C1_26
47uF/25V
1
+
CH2 IN
CH2 IN-
Titel
ALTO MISTRAL1500-CH1 DRIVE
Size
A2
Date:
File:
1 2 3 4 5 6 78
MISTRAL1500
16-Mar-2004
MIS9-CH1 Sch
Sheet
Drawn By:
RevisionModel No:
C C LI N
VER040302
32of
7654321
8
U2A
R1_32
100R
1
J1_6
2
2
1
1
CON2
1 2
3
2
1
GND1
2
12
1
(1.5A 200V)
4
CH1 I NSE RT OUT
CH1 INSERT IN
OPERATING LED
R1_25
CH1 LIM SW2
47R
CH1_LIM_SW1
D1_9
D1_21
3mm YELLOW LED
4
W2 -0 4
(1.5A 200V)
(FTR VT90N1 VACTEC+)
CH1 PHOTO COUPLER
3
D1_20
W2 -0 4
1 2
C1_27
47uF/25V
R1_29
3P-2.5
3
2
1
CH1 GAIN
Vic+
12
R1_33
3K3 1/2W
12
Vic-
U1_2
VTL5C2
3
41
3
R1_31
4K7
12
3
12
2
1
GND1
2
2
GND1
R1_3
10K
1 2
R1_30
4K7
12
D1_16
3mm GREEN LED
1 2
56pF/50 cer
6
5
U1_1B
NJM4580L
2 1
Vic-
R1_5
CH1 BRIDGE SWIT CH
AC1
V+
GND
V-
D1_6
1N4148
Vic+
ZD15V1.3W
C1_5
ZD15V1.3W
D1_7
1N4148
12
330R
12
GND1
J1_7
CN-P CB6 .3
J1 8
CN-P CB6 .3
J1 9
CN-P CB6 .3
J1 10
CN-P CB6 .3
+15V
21
12
D1_3
2 1
C1_8
220uF/25V
GND1
C1_14
12
3.3nF/100 poly
C1_9
2.2nF/50 cer
7
22nF/50 cer
D1_8
-15V
1 2
1 2
47uF/16NP
3
2
1
3
2
1
3
2
1
3
2
1
1 2
12
C1_10
R1_8
NTC 50R
GND1
C1_4
220uF/25V
1
12
K
2
C1_7
27pF/50 cer
R1_6
12K SPEAKERS BUS
12
C1_6
3
2
1
3
2
1
3
2
1
3
2
1
R1_37
12K
OUTPUT 1
12
R1_11
2K2 2W
12
R1_9
820R
ZD5V6 1/2W
2 1
2
D1_11
K
1N4937
1
2
K
A
1N4937
1
3
3
2
1
1 2
1
ZD5V6 1/2W
2 1
12
R1_10
820R
R1_12
2K2 2W
1 2
F1_1
1 2
5A
F1_2
1 2
5A
D1_13
D1_12
R1_16
2
D1_14
TRIMMER 100R
Vic+
84
Vic-
R1_15
1 2
150R
12
R1_7
330R
12
R1_4
330R
Q1_2
MJE15031
U1_1C
NJM4580L
+73V_A
-73V_A
Q1_1
MJE15030
B
R1_17
4R7 1W
R1_18
4R7 1W
B
D1_2
1N4004
2 1
12
R1_13
22R 1W
0 2A
CE
12
12
EC
0 2A
2
R1_14
22R 1W
12
EC
B
C1_11
3.3nF/50 cer
1 2
C1_12
3.3nF/50 cer
1 2
CE
B
2
R1_36
120K
1 2
5mm RED LED
GND1
R1_19
0.1R 3W
B
Q1_3
2xMJL21193
22nF/100V poly
GND1
B
Q1_4
R1_20
0.1R 3W
+15V
84
-15V
12
GND1
D1_4
12
R1_23
0.1R 3W
EC
Q1_7
D1_19
1N4148
C1_13
1 2
D1_10
2 1
1N4148
CE
Q1_8
2
R1_24
0.1R 3W
U2C
NJM4580L
C1_1
47uF/100V
R1 39
PTC 65R
100R
10K
GND1
21
12
1
A
K
2
1
A
K
2
6A
D1_15
1N4004
12
R1_21
1 2
470R 3W
12
GND1
D1_17
1N4004
6A
D1_5
ZD15V1.3W
12
2 1
R1_38
10K
12
R1_34
47K
+73V_A
C1_15
4700uF/80V
R1_26
5R6 2W
1 2
L1_1
1 2
R1_35
100K
EC
Q1_5
MPSA92
R1_40
6K8
1 2
11A
GND1
B
CE
2uH 10A
Vic+
Q1_6
MPSA42
Vic-
12
R1_22
10R 3W
12
C1_2
100nF/250V poly
GND1
OUTPUT 1 OUTPUT1
C1_16
4700uF/80V
-73V_A
1 2
B
J1 5
1
1
1+
2
2
3
3
CN-P CB6 .3
CH1 OUTPUT
TO
SPEAKON PCB
J1 4
1
1
1-
2
2
3
GND1
3
CN-P CB6 .3
Pout=418W RMS @ 4 Ohm
D
C
B
A
R1_41
1 2
D
3mm RED LED
C
C1_24
10uF/50V
R1_1
1 2
CH1 IN-
CH1 IN+
B
A
1 2
10K
R1_2
1 2
1 2
10K
C1_23
10uF/50V
C1_3
100pF/50 cer
CH1 IN+
CH1 IN-
CH1 BRIDGE SWITCH CH2 BRIDGE
CH1_LIM_SW1
CH1_LIM_SW2
GND1 GND1
R1_42
4K7 1/8W
1 2
D1_18
CLIP
2
3
12
12
GND1
GND1
J4
112
334
556
778
9910
11112
13314
HEADER 7X2
R1_28
10K
4K7 1/8W
2
3
GND1
12
GND1
C1_25
100pF/50 cer
1 2
R1_27
1 2
10K
U1_1A
NJM4580L
2
CH2_LIM_SW1
4
CH2_LIM_SW2
6
8
10
12
14
NJM4580L
C1_26
47uF/25V
1 2
CH2 IN+
CH2 IN-
Titel
ALTO MIST RAL1500-CH1 DRIVE
Size
A2
Date:
File:
1 2 3 4 5 6 78
MISTRAL1500
2-Mar-2004
MIS15-CH1.Sch
Sheet
Drawn By:
RevisionModel No:
32of
C.C.LI N
VER040302
7654321
8
U2A
R1_32
100R
1
J1_6
2
2
1
1
CON2
1 2
3
2
1
GND1
2
12
1
(1.5A 200V)
4
CH1 I NSE RT OUT
CH1 INSERT IN
OPERATING LED
R1_25
CH1 LIM SW2
47R
CH1_LIM_SW1
D1_9
D1_21
3mm YELLOW LED
4
W2 -0 4
(1.5A 200V)
(FTR VT90N1 VACTEC+)
CH1 PHOTO COUPLER
3
D1_20
W2 -0 4
1 2
C1_27
47uF/25V
R1_29
3P-2.5
3
2
1
CH1 GAIN
Vic+
12
R1_33
3K3 1/2W
12
Vic-
U1_2
VTL5C2
3
41
3
R1_31
4K7
12
3
12
2
1
GND1
2
2
GND1
R1_3
10K
1 2
R1_30
4K7
12
D1_16
3mm GREEN LED
1 2
56pF/50 cer
6
5
U1_1B
NJM4580L
2 1
Vic-
R1_5
CH1 BRIDGE SWIT CH
AC1
V+
GND
V-
D1_6
1N4148
Vic+
ZD15V1.3W
C1_5
ZD15V1.3W
D1_7
1N4148
12
330R
12
GND1
J1_7
CN-P CB6 .3
J1 8
CN-P CB6 .3
J1 9
CN-P CB6 .3
J1 10
CN-P CB6 .3
+15V
21
12
D1_3
2 1
C1_8
220uF/25V
GND1
C1_14
12
3.3nF/100 poly
C1_9
2.2nF/50 cer
7
22nF/50 cer
D1_8
-15V
1 2
1 2
47uF/16NP
3
2
1
3
2
1
3
2
1
3
2
1
1 2
12
C1_10
R1_8
NTC 50R
GND1
C1_4
220uF/25V
1
12
K
2
C1_7
27pF/50 cer
R1_6
12K SPEAKERS BUS
12
C1_6
3
2
1
3
2
1
3
2
1
3
2
1
R1_37
12K
OUTPUT 1
12
R1_11
2K2 2W
12
R1_9
820R
ZD5V6 1/2W
2 1
2
D1_11
K
1N4937
1
2
K
A
1N4937
1
3
3
2
1
1 2
1
ZD5V6 1/2W
2 1
12
R1_10
820R
R1_12
2K2 2W
1 2
F1_1
1 2
5A
F1_2
1 2
5A
D1_13
D1_12
R1_16
2
D1_14
TRIMMER 100R
Vic+
84
Vic-
R1_15
1 2
150R
12
R1_7
330R
12
R1_4
330R
Q1_2
MJE15031
U1_1C
NJM4580L
+73V_A
-73V_A
Q1_1
MJE15030
B
R1_17
4R7 1W
R1_18
4R7 1W
B
D1_2
1N4004
2 1
12
R1_13
22R 1W
0 2A
CE
12
12
EC
0 2A
2
R1_14
22R 1W
12
EC
B
C1_11
3.3nF/50 cer
1 2
C1_12
3.3nF/50 cer
1 2
CE
B
2
R1_36
120K
1 2
5mm RED LED
GND1
R1_19
0.1R 3W
B
Q1_3
2xMJL21193
22nF/100V poly
GND1
B
Q1_4
R1_20
0.1R 3W
+15V
84
-15V
12
GND1
D1_4
12
R1_23
0.1R 3W
EC
Q1_7
D1_19
1N4148
C1_13
1 2
D1_10
2 1
1N4148
CE
Q1_8
2
R1_24
0.1R 3W
U2C
NJM4580L
C1_1
47uF/100V
R1 39
PTC 65R
100R
10K
GND1
21
12
1
A
K
2
1
A
K
2
6A
D1_15
1N4004
12
R1_21
1 2
470R 3W
12
GND1
D1_17
1N4004
6A
D1_5
ZD15V1.3W
12
2 1
R1_38
10K
12
R1_34
47K
+73V_A
C1_15
4700uF/80V
R1_26
5R6 2W
1 2
L1_1
1 2
R1_35
100K
EC
Q1_5
MPSA92
R1_40
6K8
1 2
11A
GND1
B
CE
2uH 10A
Vic+
Q1_6
MPSA42
Vic-
12
R1_22
10R 3W
12
C1_2
100nF/250V poly
GND1
OUTPUT 1 OUTPUT1
C1_16
4700uF/80V
-73V_A
1 2
B
J1 5
1
1
1+
2
2
3
3
CN-P CB6 .3
CH1 OUTPUT
TO
SPEAKON PCB
J1 4
1
1
1-
2
2
3
GND1
3
CN-P CB6 .3
Pout=418W RMS @ 4 Ohm
D
C
B
A
R1_41
1 2
D
3mm RED LED
C
C1_24
10uF/50V
R1_1
1 2
CH1 IN-
CH1 IN+
B
A
1 2
10K
R1_2
1 2
1 2
10K
C1_23
10uF/50V
C1_3
100pF/50 cer
CH1 IN+
CH1 IN-
CH1 BRIDGE SWITCH CH2 BRIDGE
CH1_LIM_SW1
CH1_LIM_SW2
GND1 GND1
R1_42
4K7 1/8W
1 2
D1_18
CLIP
2
3
12
12
GND1
GND1
J4
112
334
556
778
9910
11112
13314
HEADER 7X2
R1_28
10K
4K7 1/8W
2
3
GND1
12
GND1
C1_25
100pF/50 cer
1 2
R1_27
1 2
10K
U1_1A
NJM4580L
2
CH2_LIM_SW1
4
CH2_LIM_SW2
6
8
10
12
14
NJM4580L
C1_26
47uF/25V
1 2
CH2 IN+
CH2 IN-
Titel
ALTO MIST RAL1500-CH1 DRIVE
Size
A2
Date:
File:
1 2 3 4 5 6 78
MISTRAL1500
2-Mar-2004
MIS15-CH1.Sch
Sheet
Drawn By:
RevisionModel No:
32of
C.C.LI N
VER040302
7654321
8
U2B
R2_32
100R
7
J2_6
2
2
1
1
CON2
1 2
3
2
1
GND1
2
1
12
(1.5A 200V)
4
CH2 I NSE RT OUT
CH2 INSERT IN
OPERATING LED
R2_25
CH2 LIM SW2
47R
CH2_LIM_SW1
D2_9
D2_21
3mm YELLOW LED
4
W2 -0 4
(1.5A 200V)
(FTR VT90N1 VACTEC+)
CH1 PHOTO COUPLER
3
D2_20
W2 -0 4
1 2
C2_27
47uF/25V
R2_29
3P-2.5
3
2
1
CH1 GAIN
Vic2+
12
R2_33
3K3 1/2W
12
Vic2-
U2_2
VTL5C2
3
41
3
R2_31
4K7
12
3
12
2
1
GND1
2
2
GND1
R2_3
10K
1 2
R2_30
4K7
CH2 BRIDGE
12
D2_16
3mm GREEN LED
Vic2+
C2_5
1 2
56pF/50 cer
6
5
U2_1B
NJM4580L
2 1
Vic2-
R2_5
330R
D2_6
1N4148
D2_3
ZD15V1.3W
7
D2_8
ZD15V1.3W
-15V
D2_7
1N4148
12
1 2
12
GND1
+15V
21
12
2 1
C2_8
220uF/25V
GND1
C2_14
12
3.3nF/100 poly
C2_9
2.2nF/50 cer
1 2
12
C2_10
22nF/50 cer
GND1
1 2
R2_6
12K SPEAKERS BUS
C2_6
47uF/16NP
R2_8
NTC 50R
C2_4
220uF/25V
1
12
K
2
C2_7
27pF/50 cer
1 2
12
R2_11
2K2 2W
12
R2_9
820R
D2_13
ZD5V6 1/2W
2 1
2
D2_11
K
1N4937
1
2
D2_12
K
A
1N4937
1
3
3
R2_16
2
2
1
1
D2_14
ZD5V6 1/2W
2 1
12
R2_10
820R
R2_12
2K2 2W
1 2
Vic2+
TRIMMER 100R
84
R2_15
1 2
150R
12
R2_7
330R
12
R2_4
330R
Q2_2
MJE15031
U2_1C
NJM4580L
Q2_1
MJE15030
B
R2_17
4R7 1W
R2_18
4R7 1W
B
12
R2_13
22R 1W
0 2A
CE
12
12
EC
0 2A
2
R2_14
22R 1W
B
C2_11
3.3nF/50 cer
1 2
3.3nF/50 cer
1 2
B
12
R2_19
0.1R 3W
EC
B
Q2_3
2xMJL21193
22nF/100V poly
GND1
C2_12
CE
B
Q2_4
2
R2_20
0.1R 3W
12
R2_23
0.1R 3W
EC
Q2_7
D2_19
1N4148
C2_13
1 2
D2_10
2 1
1N4148
CE
Q2_8
2
R2_24
0.1R 3W
GND1
21
1
A
K
2
1
A
K
2
6A
D2_15
1N4004
12
R2_21
1 2
470R 3W
12
GND1
D2_17
1N4004
6A
+73V_B
C2_15
4700uF/80V
R2_26
5R6 2W
1 2
L2_1
2uH 10A
12
12
R2_22
10R 3W
12
C2_2
100nF/250V poly
GND1
OUTPUT 2 OUTPUT2
C2_16
4700uF/80V
-73V_B
11A
J2 5
1
1
1+
2
2
3
3
CN-P CB6 .3
CH1 OUTPUT
TO
SPEAKON PCB
J2 4
1
1
1-
2
2
3
GND1
3
CN-P CB6 .3
Pout=418W RMS @ 4 Ohm
D
C
B
R2_41
1 2
4K7 1/8W
6
5
GND1
12
GND1
C2_25
100pF/50 cer
1 2
R2_27
1 2
10K
U2_1A
NJM4580L
NJM4580L
C2_26
47uF/25V
1 2
12
GND1
R2_42
4K7 1/8W
1 2
D2_18
CLIP
2
3
12
R2_28
10K
GND1
D
3mm RED LED
C
C2_24
10uF/50V
R2_1
1 2
CH2 IN-
CH2 IN+
B
1 2
1 2
1 2
C2_23
10uF/50V
100pF/50 cer
10K
R2_2
10K
C2_3
Vic2-
J2_7
3
3
2
2
1
AC1
V+
GND
A
1 2 3 4 5 6 78
V-
CN-P CB6 .3
J2 8
CN-P CB6 .3
J2 9
CN-P CB6 .3
J2 10
CN-P CB6 .3
1
3
3
2
2
1
1
3
3
2
2
1
1
3
3
2
2
1
1
OUTPUT 2
F2_1
1 2
5A
F2_2
1 2
5A
+73V_B
-73V_B
D2_2
1N4004
2 1
R2_36
120K
1 2
5mm RED LED
GND1
D2_4
12
12
GND1
C2_1
47uF/100V
R2 39
PTC 65R
100R
10K
12
D2_5
ZD15V1.3W
12
2 1
R2_38
10K
12
R2_34
47K
R2_35
1 2
100K
EC
B
Q2_5
MPSA92
R2_40
6K8
1 2
GND1
B
CE
Vic2+
Q2_6
MPSA42
Vic2-
Titel
ALTO MIST RAL1500-CH1 DRIVE
Size
Date:
File:
A2
MISTRAL1500
2-Mar-2004
MIS15-CH2.Sch
Sheet
Drawn By:
RevisionModel No:
33of
C.C.LI N
A
VER040302
D
C
B
A
VER040204
11of
C.C.LIN
RevisionModel No:
4
Drawn By:
Sheet
MISTRAL1500
8-Mar-2004
ALTO : MISTRAL1500
MIS15IN.Sch
1
2
3
CN8
2
1
3
2
1
3
321
4
CN4
4
CH2-LI NK-OUT
2
1
3
4
CN5
1
2
3
CN9
2
1
3
4
CH2-XLR-IN
CON3
2
1
3
4
CN7
PJ2
SW2A
1
CH2-JACK-IN
LIMITER
2
3
CN1
2
1
3
4
CON3
1
2
3
CON3
1
2
3
CN6
2
4
6
8
10
12
14
1
3
5
7
9
11
13
HEADER 7X2
CON3
A3
Titel
Size
File:
Date:
1
2
3
4
5
CN2
D
CH1-LI NK-OUT
CN3
PJ1
CH1-XLR-IN
C
CH1-JACK-IN
SW1A
BRIDGE
SW1B
6
B
4
5
6
P
BRIDGE
SW2B
P
LIMITER
1 2 34
A
D
C
B
A
VER040204
11of
C.C.LIN
RevisionModel No:
4
Drawn By:
Sheet
MISTRAL1500
8-Mar-2004
ALTO : MISTRAL1500
Titel
321
1
1
1
1
MIS15FP.Sch
A3
Size
File:
Date:
D1_30
D2_30
D1_3
D2_3
CLIP
3mm RE D LED
D1_29
3mm BL UE LED
D2_29
POWER ON
2
1
3mm BL UE LED
POWER ON
2
2
1
3mm RE D LED
CLIP
2
D1_1
D2_1
3mm GREEN LED
2
ON/PROTECTION
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CN3
CON14
1
3mm GREEN LED
2
ON/PROTECTION
3mm YELLOW LED
LIMITER
2
1
3mm YELLOW LED
LIMITER
2
VR1_1
B50K
1
2
3
CN1_1
D
3P2 5
C
VR2_1
3
CN2_1
B50K
1 2 34
1
2
3P2 5
B
A
D
4
MIS15
MIS15-CH1 SCH
MIS15
MIS15-CH2 SCH
C
11223
J3
12
+24V
C3
CON3
3
FAN
10uF/63
B
A
VER040302
31of
C.C.LIN
RevisionModel No:
Drawn By:
Sheet
MISTRAL1500
100nF/50 cer
NTC 100R
LM317T
12
OUT
G
OUT
IN
IN
12
C6
G
ALTO MISTRAL1500 FAN
R2
47R
1 2
12
1 2
Titel
2-Mar-2004
MIS15-FAN.Sch
A4
Size
File:
Date:
10uF/50
12
R4
3K3
R1
3K3
C2
R3
321
U1
POWER ON LED
D2
3mm GREEN LED
+15V
G
1 2
1
2
C1
470uF/35V
12
+15V-15V
R5
0R
CH1 INSERT OUTCH1 INSERT IN
C4
470uF/35V
12
D1
W2-04
(1.5A 200V)
1
3
C5
470uF/35V
G
1
4
2
11223
2
-15V
3
GNDF GNDF GND1
CH2 INSERT OUTCH2 INSERT IN
2
4
6
8
10
2
4
6
8
10
1
3
5
7
9
J1
1
3
5
7
HEADER 5X2
9
GND1 GND1
1 2 34
12V
12V
J2
HEADER 3
D
C
B
A
4.PCB Layout
MIS15FP
Top overlay
Bottom layer
MIS151N1
Top overlay
MIS151N2
Bottom layer
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