Alto_Altodrive_3.4_Crossover_Service_Manual.pdf

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Service Manual
Model: ALTODRIVE3.4
3-WAY STEREO DIGITAL X - OVER
www.altoproaudio.com
Version: 1.1
CONTENTS
1. Specification…………………………………………. 1
2. Block Diagram………………………….…………… 0
3. Schematic Diagram..…………………..……..…….
9
4. Printed Circuit Board………………………………. 19
5. Wiring Diagram…………………………………..…. 1
6. Test Procedure………………………………….…… 0
7. Electrical Parts List………………………………… 16
8. Exploded Views & Mechanical Parts List………… 1
9. Troubleshooting………………………………..……. 0
10. Notes…………………………………………….…… 0
Input Channel
Digital Input Gain
4 Parametric Filters
/+ 12 dB / step 0.5 dB
Ga in /+ 1 5 dB / s te p 0. 5 dB
Freq 20 Hz 20 KHz step 1/12 oct
BandWidth 0.05 oct 3 oct / step 0.05 oct
Up to 512 ms minimum step 21us
Delay line
Output Channel
Digital Out Volume
Delay line
5 Parametric Filters
/+ 12 dB / step 0.5 dB
Up to 512 ms minimum step 21us
Gain /+ 15 dB / step 0.5dB
Freq 20 Hz - 20 KHz / step 1/12 oct
BandWidth 0.05 oct - 3 oct step 0.05 oct
High Pass filter type Butterworth
Freq: 20 Hz - 20 KHz / step 1/12 oct
Slope: Bypass, 1
st
ord,2
nd
ord, 3
rd
ord, 4
th
ord
Low Pass filter type Butterworth
Freq:20 Hz - 20 KHz / step 1/12 oct
Slope: Bypass, 1
st
ord,2
nd
ord, 3
rd
ord, 4
th
ord
Polarity
Limiter
Phase 0 or 180
Threshold 29 dB up to 0 dB / step 1dB
Release Time 0.4 s, 0.5 s, 0.7 s, 1.4 s
Attack Time 0.05 s, 0.10 s, 0.20 s, 0.30 s
The Whole Unit
Memory
Analog
Inputs
Outputs
Input Impedance
Output Impedance
Input MAX Level
Output MAX Level
A/D Converter
D/A Converter
Performance
THD+N
Amplitude
S/N Ratio
Digital
Processor speed
DSP resolution
Control
MIDI section
Connections
Sockets
Mode
Input/output/thru
5 poles DIN(female)
Photocoupled
36 MIPs
24 32 bits
Microprocessor
0.02 (1KHz 3dBFS)
20Hz 20KHz
>97dBa
2 XLR - F (BAL)
6 XLR - M (BAL)
>40k
<200
12dBv
12dBv
20BITS Sigma-Delta
24BITS Sigma-Delta
1 Factory Preset
64 User Preset
Power Supply
Connector type
Type
fuse
AC Input
rated power consumption
User Interface
Graphic display
Keyboard
Vu meter
Physical
Size
Dimensions
weight
3 poles DIN (female)
Servo controlled, Switching
210 240V: T250mAL 250VAC
95 120V: 500mAL 250VAC
95 240V~60
15W
50Hz
128 64 dots
14 user keys/ 8LEDs
2 6 LEDs
Standard 19"rack Mounting
483(W) 232.5(D) 44(H)mm(19"
3.5Kg(7.72lb)
9.3"
1.7")
1
2
3
4
5
6
7
8
U10 74LVC125A
SEL_LCD
1
2
3
4
5
6
7
10E VCC
1A 40E
1Y
4A
20E 4Y
2A 30E
2Y
3A
GND 3Y
DGND
DGND
14
13
12
11
10
9
8
+3.3V
D
D
+3.3V
B7
B6
B5
B4
B3
B2
B1
B0
+3.3V
+5VD
U9 74LVX4245
/RD
U8
74LVC125A
/WR
/RD
SEL_DIS
+3.3V
C
RESET_DIS
1
2
3
4
5
6
7
10E VCC
1A 40E
1Y
4A
20E 4Y
2A 30E
2Y
3A
GND 3Y
14
13
12
11
10
9
8
B0
B1
B2
B3
B4
B5
B6
B7
A0
A1
A2
A3
A4
A5
A6
A7
C
+5VD
DGND
DGND
24
23
22
21
20
19
18
17
16
15
14
13
DGND
VCCBVCCA
VCCB T/R
/OE
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
GND
GND GND
1
2
3
4
5
6
7
8
9
10
11
12
C16
10uF
J1 CON12
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
DGND
TO GRAPHIC DISPLAY (PG12864LRS-NRA-H)
U1A
OC
CLK
1
11
R17
10K
ZD1
CN1
CN2
AR1
330R*4
SEL_574A
DGND
+5VD
7
6
5
4
3
2
1
LED_A0
LED_A1
LED_A2
LED_A3
LED_A4
LED_A5
7
6
5
4
3
2
1
LED_A0
LED_A1
LED_A2
LED_A3
LED_A4
LED_A5
CON7
DGND
CON7
LED_A0
LED_A1
LED_A2
LED_A3
LED_A4
LED_A5
LED_A6
LED_A7
1
3
5
7
1
3
5
7
2
4
6
8
2
4
6
8
12
13
14
15
16
17
18
19
Q8
Q7
Q6
Q5
Q4
Q3
Q2
Q1
D8
D7
D6
D5
D4
D3
D2
D1
9
8
7
6
5
4
3
2
A7
A6
A5
A4
A3
A2
A1
A0
AR2
330R*4
74HCT574
B
B
R4
10R
CON1
R6
10R
20
20
U1B
74HCT574
HEADER 8X2
CON2
SEL_LCD
C8
100nF
U3B
74HC574
C10
100nF
/RD
/WR
RESET_DIS
SEL_574B
SEL_DIS
SEL_574A
U3A
OC
CLK
1
11
10
DGND
10
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
A7
A6
A5
A4
A3
A2
A1
A0
12
13
14
15
16
17
18
19
SEL_574B
Q8
Q7
Q6
Q5
Q4
Q3
Q2
Q1
D8
D7
D6
D5
D4
D3
D2
D1
9
8
7
6
5
4
3
2
A7
A6
A5
A4
A3
A2
A1
A0
J3
+5VD
+5VD
U7
LM1117-3.3
+3.3V
1
2
LED_A0
LED_A1
LED_A2
LED_A3
LED_A4
LED_A5
LED_A6
LED_A7
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
Q1
H2N6718L-A
R3
R2
10K
Q3
H2N6718L-A
R21
R20
10K
Q2
H2N6718L-A
R19
R18
10K
74HC574
2P-2.5
HEADER 8X2
A
C19
100nF
C18
10uF
C21
10uF
C20
100nF
DGND
A
DGND
Titel
FRONT LEFT PANEL
Size
A3
Date:
File:
3
4
5
6
Model No:
GROUP3
6-Nov-2002
Revision
VER020724
G3FP_L2.Sch
7
Sheet
1 of 2
Drawn By:
C.C.LIN
8
1
2

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