Alto DIGAN2.7 Service Manual
MODEL:DIGAN2.7
www.altoproaudio.com
Version 1.0
CONTENT
1. Introduction…………………………………………………………………….1
2. Specification…………………………………………………………………...2
3. Block Diagram…………………………………………………………………3
4. Schematic Diagram…………………………………………………………...4
5. Wiring Diagram………………………………………………………………...9
6. PCB Layout……………………………………………………………………10
7. Test Procedure………………………………………………………………..17
8. Exploded View & Mechanical Parts List………………………………….20
9. BOM……………………………………………………………………………..22
1. Introduction
1. Digital control and DSP technology with graphic display 7 bands Graphic or
Parametric equalization.
2. Dynamic range processing with Ratio, Threshold, Attack and Release time
control.
3. Tone adjustment with Bass and Treble control.
4. 100 presets: 30 factory presets and 70 user-programmable presets.
5. 32x24 bit DSP processing with 48KHz sampling rate.
6. Stereo channels processing with or without link control.
7. +/- 12 dB boost/cut for every bands adjustment.
8. Master volume control.
9. EQ Bypass function support.
10. USB control interface for easy operating with PC editor.
11. 2 unbalanced 1/4” TRS jacks.
1
2. Technical Specification
System Parametric
Input section
Output section
USB serial port USB1.1
(AC/AC adapter)
Band 2×7 bands, 4/3octave
Bandwidth 20Hz-20kHz
THD+N%
Signal to noise ratio
Input gain +/-12dB
Output gain +/-6dB
Preset Factory preset: 30, User preset: 70
Inputs Two 1/4" TRS connectors
Input impedance
Input level Maximum Input Level: +16dBu
Outputs Two 1/4"TRS connectors
Output impedance
Output level Maximum Output Level: +16dBu
Input voltage 9 Volt AC Power Transformer Power supply
Power consumption 6W
＜0.015%, Analog In to Analog Out
＞90dB A-Weighted, Analog In to Analog Out
Balanced＞50Kohm, Unbalanced＞25Kohm
Balanced＞120ohm, Unbalanced＞60ohm
Dimension(W×D×H) 261×150×44mm Physical
Net weight 2.67Ibs(1.21kg)
2
3. Block Digram
Hardware:
(1)Front panel : LED , UP/DOWN , LINK/EXIT,BYPASS
(2)DSPboard : TAS3004+MCU(motorola)+EEPROM
Wiring Block Digram :
2/6
TAS3004
+
MCU
+
EEPROM
LED
+
KEY
DSP Front Panel
DIGAN 2.7 Surface Digram:
BYPASS
LINK/EXIT
POWER
STORE
(The LEDpanel can display the Gain value of each BAND and the setting)
3
4. Schematic Diagram
B
YEL
YEL
L180
RA10
L165
RA10
YEL
YEL
C
L181
RA11
L167
RA11
12
YEL
L182
RA12
YEL
L169
RA12
D
VDD
87654321
VDD
YEL
YEL
YEL
YEL
YEL
YEL
Q16
HR
L170
L171
L172
L173
RA3
YEL
RA3
L151
L174
RA4
YEL
YEL
L153
RA4
R29
4K7
RA0
RA1
RA2
YEL
YEL
YEL
Q15
HR
L145
L147
R28
4K7
RA0
L149
RA1
RA2
L175
RA5
L155
RA5
YEL
L176GRL177
RA6
YEL
L157GRL159
RA6
YEL
YEL
L178
L179
RA7
RA8
RA9
YEL
YEL
L161
L163
RA7
RA8
RA9
A
11 of
VER050605
Louis Chiang
RevisionModel No:
Drawn By:
Sheet
7-Jun-2005
DIGAN27-DISP_VER050117.sch
DIGAN27-DISP
VDD
VDD
CN2
5P2.5
CN3
12345
RA5
RA6
RA7
12345
RA8
RA9
RA10
RA11
RA12
5P2.5
YEL
L183
RA0
YEL
L184
R_SIGNAL
RA1
LINK
YEL
L185
RA2
YEL
L186
L_CLIP
RA0
YEL
L187
L_SIGNAL
RA1
YEL
L188
BYPASS
RA2
YEL
YEL
YEL
YEL
YEL
YEL
Q14
HR
L144
L146
L148
L150
R27
4K7
RA0
RA1
RA2
YEL
YEL
YEL
Q13
HR
L119
L121
R26
4K7
RA0
L123
RA1
RA2
RA3
YEL
RA3
L125
L152
RA4
YEL
YEL
L127
RA4
L154
RA5
L129
RA5
YEL
L156GRL158
RA6
YEL
L131GRL133
RA6
YEL
YEL
YEL
YEL
YEL
L160
L162
L164
L166
L168
RA7
RA8
RA9
RA10
RA11
RA12
YEL
YEL
YEL
YEL
YEL
L135
L137
L139
L141
L143
RA7
RA8
RA9
RA10
RA11
RA12
VDD
CA15
CA14
HR
EC
R23
120R
B Q10
Q11
R24
120R
HR
A2
Titel
Size
File:
Date:
VDD
VDD
VDD
VDD
RA0
RA1
RA2
RA3
RA4
RA5
RA6
RA7
RA8
RA9
RA10
RA11
RA12
YEL
YEL
YEL
YEL
YEL
YEL
Q12
HR
L118
L120
L122
L124
RA3
YEL
RA3
YEL
RA3
YEL
RA3
L108
L86
L85
L126
RA4
YEL
YEL
L109
RA4
YEL
YEL
L88
RA4
YEL
YEL
L87
RA4
R25
4K7
RA0
RA1
RA2
YEL
YEL
YEL
Q9
HR
L105
L106
R22
4K7
RA0
YEL
Q8
HR
L80
R8
4K7
RA0
YEL
Q7
HR
L79
R7
4K7
RA0
L107
RA1
RA2
YEL
YEL
L82
L84
RA1
RA2
YEL
YEL
L81
L83
RA1
RA2
L128
RA5
L110
RA5
L90
RA5
L89
RA5
YEL
L130GRL132
RA6
YEL
L111GRL112
RA6
YEL
L92GRL94
RA6
YEL
L91GRL93
RA6
YEL
YEL
YEL
YEL
YEL
L134
L136
L138
L140
L142
RA7
RA8
RA9
RA10
RA11
RA12
YEL
YEL
YEL
YEL
YEL
L113
L114
L115
L116
L117
RA7
RA8
RA9
RA10
RA11
RA12
YEL
YEL
YEL
YEL
YEL
L96
L98
L100
L102
L104
RA7
RA8
RA9
RA10
RA11
RA12
YEL
YEL
YEL
YEL
YEL
L95
L97
L99
L101
L103
RA7
RA8
RA9
RA10
RA11
RA12
R39
47R
R40
47R
R41
47R
R42
47R
R43
47R
R44
47R
R45
47R
R46
47R
R47
47R
R48
47R
R49
47R
R50
47R
R51
47R
BR
Q18
R9
STB_0
Q19BRQ20BRQ21BRQ22BRQ23BRQ24BRQ25BRQ26BRQ27BRQ28BRQ29BRQ30
4K7
R10
4K7
R11
4K7
R12
4K7
R13
4K7
R14
4K7
R15
4K7
R16
4K7
R17
4K7
R18
4K7
R19
STB_1
STB_2
STB_3
STB_4
STB_5
STB_6
STB_7
STB_8
STB_9
STB_10
4K7
R20
4K7
STB_11
R21
STB_12
BR
4K7
VDD
VDD
VDD
VDD
VDD
VDD
CA1
CA2
CA3
CA4
CA5
CA6
CA7
CA8
CA9
CA10
CA11
CA12
CA13
S1
SW-PB
S2
SW-PB
S3
SW-PB
S4
SW-PB
S5
SW-PB
S6
SW-PB
S7
SW-PB
S8
SW-PB
S9
SW-PB
S10
SW-PB
S11
SW-PB
S12
SW-PB
S13
SW-PB
S14
D11 IN4148
PB1
PB2
5 6
SW-PB
D12 IN4148
D13 IN4148
2412
U3B
74HC574
C3
100N
2010
U2B
74HC574
C2
100N
2010
U1B
74HC574
VDD
PB3
PB4
PB5
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
HEADER 14X2
D7
GND GND
GND
C1
100N
1 2 3 4 5 6 7 8
YEL
YEL
YEL
YEL
YEL
YEL
Q6
HR
L54
L56
L58
L60
R6
4K7
RA0
RA1
RA2
YEL
YEL
YEL
Q5
HR
L53
L55
R5
4K7
RA0
YEL
Q4
HR
L28
R4
4K7
RA0
YEL
Q3
HR
L27
R3
4K7
RA0
YEL
Q2
HR
L14
R2
4K7
RA0
YELL2YELL3YELL4YELL5YELL6YELL7GRL8YELL9YEL
Q1
HR
L1
R1
4K7
RA0
CA13 CA12 CA11 CA10 CA9 CA8 CA7 CA6 CA5 CA4 CA3 CA2 CA1 CA0
RA1
YEL
L30
RA1
YEL
L29
RA1
YEL
L15
RA1
RA1D0RA2
L57
RA2
YEL
L32
RA2
YEL
L31
RA2
YEL
L16
RA2
L62
RA3
RA4
YEL
YEL
YEL
L59
L61
RA3
RA4
YEL
YEL
YEL
L34
L36
RA3
RA4
YEL
YEL
YEL
L33
L35
RA3
RA4
YEL
YEL
YEL
L17
L18
RA3
RA4
RA3
RA4D0RA5
L64
RA5
L63
RA5
L38
RA5
L37
RA5
L19
RA5
YEL
L66GRL68
RA6
YEL
L65GRL67
RA6
YEL
L40GRL42
RA6
GR
YEL
L39
RA6
GR
YEL
L20
RA6
RA6D1RA7
YEL
YEL
YEL
YEL
YEL
L70
L72
L74
L76
L78
RA7
RA8
RA9
RA10
RA11
RA12
D19 IN4148
D1 IN4148
D2 IN4148
D3 IN4148
D4 IN4148
D5 IN4148
D6 IN4148
D7 IN4148
D8 IN4148
D9 IN4148
D10 IN4148
YEL
YEL
YEL
YEL
YEL
L69
L71
L73
L75
L77
RA9
RA7
RA8
YEL
L44
RA7
RA8
YEL
L41
L43
RA7
RA8
YEL
L21
L22
RA7
RA8
RA8D2RA9
YEL
L46
RA9
YEL
L45
RA9
YEL
L23
RA9
YEL
L10
RA10
YEL
YEL
L48
RA10
YEL
YEL
L47
RA10
YEL
YEL
L24
RA10
YEL
YEL
L11
RA10D3RA11
RA11
L50
RA11
L49
RA11
L25
RA11
L12
RA12
YEL
L52
RA12
YEL
L51
RA12
YEL
L26
RA12
YEL
L13
RA12
R31 10K
S15
STORE
GND
U1A
1
CA0
CA1
S16
SW-PB
SW-PB CA0
UP
D15 IN4148
D14 IN4148
CA0
CA1
CA2
U3A
STB_0
STB_1
Q812Q713Q614Q515Q416Q317Q218Q1
PB4
CA3
19
STB_2
CA4
STB_3
CA2
S17
SW-PB
DOWN
D16 IN4148
CA5
STB_4
D4
D5
CA6
10101111131214131514161517
GND
CA7
PB3
19
D6
D7
CA3
S18
SW-PB
LINK/EXIT
D17 IN4148
CA8
CA9
CA10
PB0
PB1
PB2
D12D23D34D45D56D67D78D89CLK11OC
74HC574
A23B22C21D20G118G2
S19
BYPASS
CA11
CA12
U2A
R32 10K
CA4
SW-PB
D18 IN4148
CA13
GND
1
CA14
PB5
S20
SW-PB CA5
POWER
D20 IN4148
CA15
0112233445566778899
74HC154
STB_5
STB_6
STB_7
STB_8
Q812Q713Q614Q515Q416Q317Q218Q1
D2
D1
STB_9
STB_10
STB_11
STB_12
19
D12D23D34D45D56D67D78D89CLK11OC
D7D6D5D4D3
74HC574
VDD
CN1
VDD
PB0
1 2
3 4
D0D1D2D3D4D5D6
D
C
B
A
4
D
87654321
C
1234567
CN5
HEADER 7
PD7
B
A
11 of
VER050117
Louis Chiang
RevisionModel No:
+3.3V
19
RESET
+3.3V
17
18
VDD_3V3
GND_3V3
+5VD
+3.3V
15DM16
DP
14
PL_SCL
PL_SDA
C48
R29
100N
1K5
GND
GND
R30 22R
R31 22R
C50
C49
33P
33P
GND
C42
R17
100N
+5VD
10K
PA0
PA1
GNDGND
PTA032PTA133PTA234PTA335PTA436PTA537PTA638PTA7
PA2
R25
R24
R23
R22
R21
R20
R19
R18
PA3
4K7
4K7
4K7
4K7
4K7
4K7
4K7
4K7
PA4
PA5
+5VL+5VL
PA0
PA1
PA2
12345678910
CN4
PB0
PB1
PB2
PA6
PA7
39
PTB0/A22PTB1/A23PTB2/A24PTB3/A25PTB4/A26PTB5/A27PTB6/A28PTB7/A
PA3
PB3
PA4
PB4
PA5
PA6
PA7
PD0PD1
PD2PD3
PD4PD5
PD6PD7
1112
1314
1516
1718
1920
2122
2324
2526
2728
HEADER 14X2
PB6
PB5
PB7
LGND LGND
DIGAN214-CPU
+3.3V
Titel
R35 4K7
R36 4K7
R37 4K7
RESET
SCL
SDA
PL_SCL
PL_SDA
29
PTC02PTC13PTC24PTC35PTC46PTC57PTC6
8
U4
HC908GP32
R27
0R*
R28
0R*
TX
RX
C46
R34 10K
R33 10K
R32 10K
+3.3V
100N GND
CLK
U5 PL2303
GND
C47
100N
20
21
22
23
24
25
26
27
28
VDD
VDD_PLL
GND_PLL
LD_MODE
TX
GND
TRI_MODE
OSC1
OSC2
PLL_TEST
TXD1DTR_N2RTS_N3VDD_2324RXD5RI_N6GND7VDD8DSR_N9DCD_N10CTS_N11SHTD_N12EE_CLK13EE_DATA
RX
Drawn By:
Sheet
5-Jun-2005
DIGAN214-CPU_VER050511(DIGAN2.7).SCH
Size
File:
Date:
+5VL
CN2
+5VD
123
4
AGND
GND
AVDD
LGND
+3.3V
AVDD
U6
+5VD +3.3V
AGND
R26
4R7
IN
LM1117-3.3
IN OUT
35NC36
GND
R5
C5
C45
33NC34
10uF
47uF
32
28
R16
27
100R
26
VSS
VSSA
C44
0.47uF
U2_SDOUT0
U1_SDOUT1
GND
25
16
41
C41
100N
C28
2u2F
SDA
U2_SCLK
U2_LRCLK
SCL
GNDGNDGND
RESET
CLK
C51
R38
56P
GND
56R
SCL
SDA
AGND
+3.3V
L1
BEAD*
GND
U1_SDOUT1
26
27
28
29
30
31
GND
25
8
VCC
NC1NC2A23GND
U3
C39
100N
U2_SDOUT0
U2_SCLK
6NC7
SCL
SCL
SDA
U2_LRCLK
CLK
5
SDA
AT24C64
4
GND
RESET
+5VD +5VD
C40
100N
C18
VDD
17
40
VDDA
PTD012PTD113PTD214PTD315PTD418PTD519PTD620PTD721PTE0/T9PTE1/R10IRQ11RST1OSC144OSC243CGMXFC42VREFH30VREFL
PD7
PD6
PD5
PD4
PD0
PD1
PD2
100N
AVDD
AGND
PD3
+3.3V
C19
TX
100N
AGND
10K
R15
+5VD
C43 100N
R6 4K7
33NC34
35NC36
RX
CLK
31
+5VD
GND
29
30
31
32
R11
R12
C3
AGND
C14
C8
C35
C34
AGND
C24 C16
U1
C25 C17
37
38
39
40
41
42
43
44
45
46
47
48
DIGAN2.7 No used in this area.
Totle 20 components
D
AOUTR
VCOM
AOUTL
RINA
RINB
AINRP
AINRM
VREFP
VREFM
AINLM
AINLP
LINB
AVDD
LINA1VRFILT2AVSS3AVSS4INPA5RESET6CS17PWR_DN8TEST9CAP_PLL10CLKSEL11MCLKO
AGND
SDOUT0
SDOUT1
ALLPASS
12
C1 C9
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
SDOUT2
SDIN2
SDIN1
IFM/S
SCLK/O
LRCLK/O
DVSS
DVDD
SDA
SCL
XTALO
XTALI
GND
R7
AGND
C
24
23
22
21
20
19
18
17
16
15
14
13
+3.3V
C6 C20
C22 C10
GND
GND
GND
R13 27K*
R14 27K*
C15
AGND
100N
C4
C11
100N
2u2F
C37
C36
AGND
C26
2u2F
1000P
1000P
CN1
10uF
C29
R1 100R
6
10uF
C30
R2 100R
B
C31
C27
10uF
2u2F
C32
12345
37
38
39
40
41
42
43
44
45
46
47
48
10uF
U2
TAS3004
CON11
GPIO3
GPIO4
GPIO5
AVDD
AOUTR
VCOM
AOUTL
RINA
RINB
AINRP
AINRM
VREFP
VREFM
AINLM
AINLP
LINB
LINA1VRFILT2AVSS3AVSS4INPA5RESET6CS17PWR_DN8TEST9CAP_PLL10CLKSEL11MCLKO
AGND
R10
10K
AGND
R9
10K
AGND
L2
YEL
AGND
1K
R3
R4
+3.3V
GPIO1
GPIO2
4K7
GPIO0
ALLPASS
SDOUT0
SDOUT1
12
C12
100N
C2
2u2F
SDOUT2
SDIN2
SDIN1
IFM/S
SCLK/O
LRCLK/O
DVSS
DVDD
SDA
SCL
XTALO
XTALI
GND
R8
AGND
24
23
22
21
20
19
18
17
16
15
14
13
33R
+3.3V
C21
C7
A
0.47uF
1500P
GND
C38
12.288MHz
C33
C13
100N
C23
2u2F
GND
22P
X1
GND GND
22P
GND
1 2 3 4 5 6 7 8
5
D
C
B
A
10
R22
IC7C
R17
4K53
MC33079
3K16
7
6
L18
D1
R23
5
X5
LJB0661-6
BLM21A102
1N4148
3K16
R24
IC7B
MC33079
AGND
2
OUTPUT CH2
213
221133
CGNDCGNDCGND
L9
+5V-L
R57
C20
R58
10K0
10P
BLM21A102
RL2
RY-5W-K
R68
47R(1206)
R59
60R4
8
5K76
9
AGND
R53
51K1
R52
OUT_R
C10
470P
C11
470P
TR3
3904
R9
R25
4K53
3K24
1
R27
6K04
C9
10P
IC7A
MC33079
3
AGND
4K7
AGND
14
13
R26
12
R18
10K0
RELAY-CTRL
60R4
IC7D
MC33079
R28
2K67
AGND
C22
10P
87654321
OUTPUT CH1
213
221133
L6
BLM21A102
RL1
RY-5W-K
R30
47R(1206)
+5V-L
R21
60R4
R20
5K76
8
C8
10P
9
R19
10K0
AGND
R15
51K1
C6
10P
R14
10K0
OUT_L
10
R60
R55
10K0
4K53
IC8C
3K16
6
D3
R61
MC33079
7
5
X7
LJB0661-6
L19
BLM21A102
1N4148
3K16
IC8B
AGND
R62
3K24
MC33079
2
C24
470P
CGNDCGND CGND
C25
470P
RELAY-CTRL
R10
4K7
TR4
3904
AGND
R63
4K53
R64
6K04
60R4
14
IC8D
MC33079
12
13
R66
2K67
R56
10K0
12345
CN1
CON6
R65
C23
10P
1
IC8A
MC33079
3
AGND
Titel
AGND
6
L15
21 of
SHUNG LIN.
RevisionModel No:
Drawn By:
Sheet
DIGAN2.70 VER050306
27-May-2005
DIGAN2.7-IO.SCH
DIGAN2.70 IN-OUT SECTION
A3
Size
File:
Date:
BLM21A102
AGND
C3
10P
INPUT CH1
D
R5
5K11
R3
R1
L4
BLM21A102P
2132211
IN_L
1
3
2
13K3R413K3
13K3R213K3
33
IC5A
4580M
L5
BLM21A102P
X2
R7
5K11
C4
10P
C1
47P
C2
47P
LJB0661-6
AGND
CGND AGND
CGND
CGND
C17
10P
INPUT CH2
C
R42
5K11
L7
BLM21A102P
IN_R
7
6
R40
13K3
R38
13K3
2132211
33
5
L8
IC5B
R41
R39
4580M
R44
C18
13K3
C15
C16
13K3
BLM21A102P
X4
5K11
10P
47P
47P
LJB0661-6
AGNDCGND
AGND
CGND CGND
+VCC
411
IC8E
MC33079
C41
IC7E
411
MC33079
C39
84
IC5C
4580M
B
100N
100N
-VCC
AGNDAGND
C42
100N
C40
100N
L12 0R0
L11 0R0
IN_L
DIGAN2.7-PWRDIGAN2.7-PWR.Sch
IN_R
L13 0R0
OUT_L
L14 0R0
OUT_R
1 2 3 4 5 6 7 8
A
6
A
Titel
GND1
22 of
VER050306
SHUNG LIN
RevisionModel No:
Drawn By:
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DIGAD2.70
27-May-2005
DIGAN2.7-PWR.Sch
DIGAN2.70 POWER SUPPLY
A3
Size
File:
Date:
1000uF/10V
100N
C
123
4
CN3
+5V-L+5V
-VCC
C28
330uF/16V
CON4
C29
330uF/16V
D
4321
L16
0R0
C26
+5V-L
2200uF/16V
C13
100N
C43
+5V
C14
+VCC
B
L17
0R0
TR1
7805
1N4002D41N4002
D2
C21
34
L3
PLT09H-2003R
2200uF/16V
C12
100N
C5 100N
6 1
C7 100N
C30
TR2
100N
7805
1N4002
D5
1N4002
D6
GND1
C27
D7
1N4002
C19
2200uF/16V
TP1
TO CHASSIS GND
R6
2200uF/16V
D8
TP2
10R
1N4002
L1
BLM21A102
C31
10P
J2
TO CHASSIS GND
CN-RCA2-1
0R0
JP2
1 2
CGND
0R0
RELAY-CTRL
L2
BLM21A102
C33
10P
1 2
AGND
TO DSP BOARD
L10
BLM21A102
R8
10R
CN4
7P-2.5
R11 100R
R16 0R0
C32
10P
JP1
1234567
R12
100R
USB+
USB-
R13 *0R0
12345
6
J1
1 2 3 4
CN2
CN-DJ005A
D
*AC 9V INPUT (500mA)
USB-4FR004-B
C
B
A
7
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