Alto PM-12 DRAGONFLY User manual


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

MODEL: PM-12/16
Version 2.0

CONTENTS
1. Introduction……………………………………………………………2
2. Specification…………………………………………………………..3
3. Block Diagram………………………………………………………...4
4. Schematic Diagram…………………………………………………..6
5. Wiring Diagram……………………………………………………….36
6. PCB Layout……………………………………………………………38
7. Test Procedure & Test Result……………………………………...64
8. Exploded Views & Mechanical Part List………………………….69
9. BOM……………………………………………………………………..75
1

1. Introduction
Thank you very much for expressing your confidence in ▲LTO products by purchasing ▲LTO
PM-12/16 Dragonfly multi-Channel Mixing Console with Digital Effects. The PM-12/16 are
professional compact mixer, which provides the state of the art switching power and advanced
digital amplifier technology specifically. You will get the smooth, accurate more natural and open
sound from this apparatus, it is really ideal for large gigs, recording and fixed PA installations.
The PM-12/16 Dragonfly multi-Channel Mixing Console with Digital Effects are packed with some
key features that can not be found in other consoles of its size: mono (these are provided with
ultra low is provided with warm, natural EQ (mono channels are equipped with 3-band MID
sweep EQ; stereo channels are equipped with 4-band fixed frequency EQ); 24 bits digital stereo
effect processor with 256 presets (16 presets ×16 variations); built-in digital power amplifier;
highly accurate 12-segment bar graph meters; subgroups output ets…
lDragonfly digital amplifier technology, offering high power and a very dynamic sound.
lExtremely high efficiency means the amplifier is so compact that the console is no larger
and barely and heavier than an equivalent passive console.
lBuilt-in the state of the art switching power.
lMIC input channels with gold plated XLRs and balanced LINE inputs.
lStereo input channels with balanced TRS jacks.
lUltra-low noise discrete MIC preamps with +48V phantom power.
lExtremely high headroom offering more dynamic range
l60mm high precision faders.
lEach input channel with Mute, SOLO function, overload & signal present LEDs and low cut
filters(except for stereo channel).
lSUB1-2, SUB3-4 and MAIN L-R signal assignment switch.
l4AUX sends per channel: 2 PRE/POST faders switch-able for monitoring application effects
& sound processor input; 2POST faders for internal digital DFX or as external send.
l4-band fixed EQ on stereo line channels.
l3-band EQ with swept mid on microphone channels.
lChannel inserts on each mono channel plus main mix insert for flexible connection of
outboard equipment.
l24-bit digital stereo effect processor with 256 effects(16 presets×16 variations)
lStereo 9-band graphic EQ.
lTNC socket for connecting lamp.
lControl room/phones matrix.
l2-track recording IN/OUT
lHighly accurate 12 segment output level meters.
l2×300W(4Ω)
l6.3ψjack + 4 way speaker
2

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12345678910 11 12
A
B
C
D
12
1110987654321
D
C
B
A
CH2-CH12 IDENTICAL TO CH1
2
1
3
CH1
+48V
3-BAND EQ
12K100Hz-8kHz80
HI PASS
SG/OL
LEFT-BUS RIGHT-BUS AUX1 AUX2
RIGHT-BUS
LEFT-BUS
AUX1
AUX2
STEREO INPUT CHANNELS (CH13-14)
LEFT-BUS
RIGHT-BUS
AUX1
AUX4
MAIN OUT
LEFT-BUS
RIGHT-BUS
TAPE IN
RIGHT
2TK
2TK
LEFT METER
RIGHT METER
75Hz
+/-15db
4-BAND EQ
12K50080
+/-15db
MAIN MIX
MAIN MIX LEFT
T
R
S
MAIN MIX RIGHT
T
R
S
PHONE B
T
R
S
LEVEL
PHONES
LEFT
TAPE OUT
2
1
3
2
1
3
LEVEL
STEREO AUX RTN1 3c
5e
1a
4d
2b
3c
5e
1a
4d
2b
LEVEL
-
+
T
R
S
RN
TN
T
R
S
RN
TN
PAN
PHANTOM
CH1
GAIN
-
+
POWER
-
+
LO (FREQ) HI
AUX2
AUX1
FADER
POST
PRE
BALANCE
FADER
3c
5e
1a
4d
2b
LEFT(MONO)
3c
5e
1a
4d
2b
RIGHT
T
R
S
RN
TN
T
R
S
RN
TN
-
+
-
+
MIC GAIN:0~45dB
LINE IN TRIM:+15dB~-30dB
AFL-L AFL-R SOLO(PFL)
SOLO
ON
()
AFL-L
AFL-R
SOLO(PFL)
SOLO
ON
()
AFL-L
AFL-R
SOLO(PFL)
EFX SEND
LEFT-BUS RIGHT-BUS AUX1 AUX2 AFL-L AFL-R SOLO(PFL) DFX SEND
AFL L
AFL R
SOLO(PFL) PFL LED
LOGIC
SOLO CTRL
SOLO ACTIVE
(LEVEL SET)
SOLO MODE
PFL
()
AFL
()
3c
5e
1a
4d
2b
INSERT T
R
S
RN
TN
SUB1 SUB2 SUB1
SUB2
SUB2
SUB1
AUX SEND1
LEVEL
AUX SEND 4
LEVEL
+4dB/MIC
+4dB/MIC
SUB1
LEVEL
SUB OUT
SUB1
T
R
S
SUB1 TO MIX
RIGHT-BUS
LEFT-BUS
SUB1/2
MAIN MIX
CONTROL ROOM SOURCE
ASSIGN
2TK
RIGHT
LEFT
MID
LO M-H HIL-M
3K
12K50080 3K
SUB3 SUB4
SUB3 SUB4 AUX3 AUX4
SUB4
SUB3
AUX3 AUX4
MUTE
AUX4
AUX3
AUX3
AUX4
-20dB=SG(FLICKER)
+15dB=OL(GLOW)
RIGHT-BUS
LEFT-BUS
SUB2
SUB1
ASSIGN
SUB4
SUB3
AUX2
AUX2
AUX1
POST
PRE
AUX4
AUX3
AUX3
AUX4
SOLO LED
SOLO LED
-20dB=SG(FLICKER)
+15dB=OL(GLOW)
MUTE
MONITOR
AUX1
AUX1
DFX TO
RIGHT-BUS
STEREO AUX RTN2 3c
5e
1a
4d
2b
3c
5e
1a
4d
2b
LEVEL
-
+
T
R
S
RN
TN
T
R
S
RN
TN -
+
MONITOR
DFX TO
AUX2
LEFT-BUS
STEREO AUX RTN3 3c
5e
1a
4d
2b
3c
5e
1a
4d
2b
LEVEL
-
+
T
R
S
RN
TN
T
R
S
RN
TN -
+
STEREO AUX RTN4 3c
5e
1a
4d
2b
3c
5e
1a
4d
2b
LEVEL
-
+
T
R
S
RN
TN
T
R
S
RN
TN -
+
ASSIGN TO
C-R/PHONES
CTRL/L CTRL/R
SOLO
ON
()
AFL-L
AFL-R
SOLO(PFL)
SOLO LED
RIGHT-BUS
LEFT-BUS
SUB2
SUB1
AUX RTN4
SUB4
SUB3
RIGHT-BUS
LEFT-BUS
CTRL-R-R
CTRL-R-L
(AUX SEND 2/3 IDENTICAL)
AFL-L
AFL-R
SOLO(PFL)
AFL-L
AFL-R
SOLO(PFL)
SOLO
ON
()
SOLO
ON
()
3c
5e
1a
4d
2b
MAIN INSERT
T
L
S
RN
TN
3c
5e
1a
4d
2b
MAIN INSERT
T
R
S
RN
TN
3c
5e
1a
4d
2b
MONO OUTPUT
T
R
S
RN
TN
MONO LEVEL
3c
5e
1a
4d
2b
AUX/DFX SEND
T
R
S
RN
TN
3c
5e
1a
4d
2b
AUX SEND
T
R
S
RN
TN AUX SEND 1/2/3
AUX SEND 4
2TK TO MAIN
2TK TO MAIN
SUB1
SUBMIX 2 3 4 IDENTICAL TOSUB1
(TRIM)
4-BAND EQ
+/-15db
MIC IN
LINE IN
CTRL ROOM OUTPUT
LEFT
T
R
S
RIGHT
T
R
S
PHONES OUTPUT
PHONE A
T
R
S
LEVEL
CTRL ROOM
SUB3/4
AFL-L
AFL-R
SOLO(PFL)
CTRL/L CTRL/R
FROM SUB2
FROM SUB3
FROM SUB4
DSP BOARD
PRESETS
VARIATIONS
MUTE
DSP FOOTSWITCH
FX OUT L
FX OUT R
CTRL-R-R
CTRL-R-L
DFX SEND
DFX SEND
SG/OL
LEFT(MONO)
RIGHT
LEFT(MONO)
RIGHT
LEFT(MONO)
RIGHT
LEFT(MONO)
RIGHT
AUX RETURN
SOLO
ASSIGN TO
RIGHT-BUS
LEFT-BUS
GEQ
GEQ
EQ ON
PM16MAP.Sch
Titel
Size
File:
Date: Drawn By: Sheet
RevisionModel No:
15-Jan-2005 TSB.
ALTO MIXING CONSOLE
11of
PM-16 BLOCK DIAGRAM VER050115 A3
LOGIC
AUX2
AUX1
DFX RETURN TO
ALTO PM-16
BLOCK DIAGRAM
3c
5e
1a
4d
2b SUB1 INSERT
T
S
RN
TN
IDENTICAL TO SUB1 INSERTSUBINSERT 2 3 4
DFX OUT T
R
S
R
LIMITER
R AMP
L AMP
L SPEAKER OUT
R SPEAKER OUT
CH15-16 IDENTICAL TO CH13-14
3. Black Diagram
4

12345678910 11 12
A
B
C
D
12
1110987654321
D
C
B
A
CH2-CH8 IDENTICAL TO CH1
2
1
3
CH1
+48V
3-BAND EQ
12K100Hz-8kHz80
HI PASS
SG/OL
LEFT-BUS RIGHT-BUS AUX1 AUX2
RIGHT-BUS
LEFT-BUS
AUX1
AUX2
STEREO INPUT CHANNELS (CH9-10)
LEFT-BUS
RIGHT-BUS
AUX1
AUX4
MAIN OUT
LEFT-BUS
RIGHT-BUS
TAPE IN
RIGHT
2TK
2TK
LEFT METER
RIGHT METER
75Hz
+/-15db
4-BAND EQ
12K50080
+/-15db
MAIN MIX
MAIN MIX LEFT
T
R
S
MAIN MIX RIGHT
T
R
S
PHONE B
T
R
S
LEVEL
PHONES
LEFT
TAPE OUT
2
1
3
2
1
3
LEVEL
STEREO AUX RTN1 3c
5e
1a
4d
2b
3c
5e
1a
4d
2b
LEVEL
-
+
T
R
S
RN
TN
T
R
S
RN
TN
PAN
PHANTOM
CH1
GAIN
-
+
POWER
-
+
LO (FREQ) HI
AUX2
AUX1
FADER
POST
PRE
BALANCE
FADER
3c
5e
1a
4d
2b
LEFT(MONO)
3c
5e
1a
4d
2b
RIGHT
T
R
S
RN
TN
T
R
S
RN
TN
-
+
-
+
MIC GAIN:0~60dB
LINE IN TRIM:+15dB~-45dB
AFL-L AFL-R SOLO(PFL)
SOLO
ON
()
AFL-L
AFL-R
SOLO(PFL)
SOLO
ON
()
AFL-L
AFL-R
SOLO(PFL)
EFX SEND
LEFT-BUS RIGHT-BUS AUX1 AUX2 AFL-L AFL-R SOLO(PFL) DFX SEND
AFL L
AFL R
SOLO(PFL) PFL LED
LOGIC
SOLO CTRL
SOLO ACTIVE
(LEVEL SET)
SOLO MODE
PFL
()
AFL
()
3c
5e
1a
4d
2b
INSERT T
R
S
RN
TN
SUB1 SUB2 SUB1
SUB2
SUB2
SUB1
AUX SEND1
LEVEL
AUX SEND 4
LEVEL
+4dB/MIC
+4dB/MIC
SUB1
LEVEL
SUB OUT
SUB1
T
R
S
SUB1 TO MIX
RIGHT-BUS
LEFT-BUS
SUB1/2
MAIN MIX
CONTROL ROOM SOURCE
ASSIGN
2TK
RIGHT
LEFT
MID
LO M-H HIL-M
3K
12K50080 3K
SUB3 SUB4
SUB3 SUB4 AUX3 AUX4
SUB4
SUB3
AUX3 AUX4
MUTE
AUX4
AUX3
AUX3
AUX4
-20dB=SG(FLICKER)
+15dB=OL(GLOW)
RIGHT-BUS
LEFT-BUS
SUB2
SUB1
ASSIGN
SUB4
SUB3
AUX2
AUX2
AUX1
POST
PRE
AUX4
AUX3
AUX3
AUX4
SOLO LED
SOLO LED
-20dB=SG(FLICKER)
+15dB=OL(GLOW)
MUTE
MONITOR
AUX1
AUX1
DFX TO
RIGHT-BUS
STEREO AUX RTN2 3c
5e
1a
4d
2b
3c
5e
1a
4d
2b
LEVEL
-
+
T
R
S
RN
TN
T
R
S
RN
TN -
+
MONITOR
DFX TO
AUX2
LEFT-BUS
STEREO AUX RTN3 3c
5e
1a
4d
2b
3c
5e
1a
4d
2b
LEVEL
-
+
T
R
S
RN
TN
T
R
S
RN
TN -
+
STEREO AUX RTN4 3c
5e
1a
4d
2b
3c
5e
1a
4d
2b
LEVEL
-
+
T
R
S
RN
TN
T
R
S
RN
TN -
+
ASSIGN TO
C-R/PHONES
CTRL/L CTRL/R
SOLO
ON
()
AFL-L
AFL-R
SOLO(PFL)
SOLO LED
RIGHT-BUS
LEFT-BUS
SUB2
SUB1
AUX RTN4
SUB4
SUB3
RIGHT-BUS
LEFT-BUS
CTRL-R-R
CTRL-R-L
(AUX SEND 2/3 IDENTICAL)
AFL-L
AFL-R
SOLO(PFL)
AFL-L
AFL-R
SOLO(PFL)
SOLO
ON
()
SOLO
ON
()
3c
5e
1a
4d
2b
MAIN INSERT
T
L
S
RN
TN
3c
5e
1a
4d
2b
MAIN INSERT
T
R
S
RN
TN
3c
5e
1a
4d
2b
MONO OUTPUT
T
R
S
RN
TN
MONO LEVEL
3c
5e
1a
4d
2b
AUX/DFX SEND
T
R
S
RN
TN
3c
5e
1a
4d
2b
AUX SEND
T
R
S
RN
TN AUX SEND 1/2/3
AUX SEND 4
2TK TO MAIN
2TK TO MAIN
SUB1
SUBMIX 2 3 4 IDENTICAL TO SUB1
(TRIM)
4-BAND EQ
+/-15db
MIC IN
LINE IN
CTRL ROOM OUTPUT
LEFT
T
R
S
RIGHT
T
R
S
PHONES OUTPUT
PHONE A
T
R
S
LEVEL
CTRL ROOM
SUB3/4
AFL-L
AFL-R
SOLO(PFL)
CTRL/L CTRL/R
FROM SUB2
FROM SUB3
FROM SUB4
DSP BOARD
PRESETS
VARIATIONS
MUTE
DSP FOOTSWITCH
FX OUT L
FX OUT R
CTRL-R-R
CTRL-R-L
DFX SEND
DFX SEND
SG/OL
LEFT(MONO)
RIGHT
LEFT(MONO)
RIGHT
LEFT(MONO)
RIGHT
LEFT(MONO)
RIGHT
AUX RETURN
SOLO
ASSIGN TO
RIGHT-BUS
LEFT-BUS
GEQ
GEQ
EQ ON
PM12MAP.Sch
Titel
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File:
Date: Drawn By: Sheet
RevisionModel No:
12-Jan-2004 BAO.
ALTO MIXING CONSOLE
11of
PM-12 BLOCK DIAGRAM VER031126 A3
LOGIC
AUX2
AUX1
DFX RETURN TO
ALTO PM-12
BLOCK DIAGRAM
3c
5e
1a
4d
2b SUB1 INSERT
T
S
RN
TN
IDENTICAL TO SUB1 INSERTSUB INSERT 2 3 4
DFX OUT T
R
S
R
LIMITER
R AMP
L AMP
L SPEAKER OUT
R SPEAKER OUT
CH11-12 IDENTICAL TO CH9-10
5

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
R46
4R7
R47
4R7
C38
1n
C34
1n
C44
1000u/10V
R54
4R7
VR1
O10K
R101
1K50
R11
2K49 3
21
U2A
4580M
R124
5K11
C50
22P
C99
47u/25V
5
67
U2B
4580M
R157
62K
R153
1K3
R66
20K
R65
20K
C100
47u/25V
C86
0.22u/50V
C85
0.22u/50V
C93
0.22u/50V
R199
6K8
LO CUT
2
1
3
4
X1
JY-5042-030G
3c
5e
1a
4d
2b
X2
JY-6351G-02-250
T
R
S
RN
TN
C21
330P
C1
10N
R83
470R
R12
2K49
C11
47u/63V
C12
47u/63V
R93
6K34
R94
6K34
C27
22u/35V
C26
22u/35V
R2
6K81
R1
6K81
3
21
U4A
4580M
R128
5K11
C54
22P
C101
47u/25V
5
67
U4B
4580M
R158
62K
R154
1K3
R68
20K
R67
20K
C102
47u/25V
C88
0.22u/50V
C87
0.22u/50V
C94
0.22u/50V
R200
6K8
2
1
3
4
X3
JY-5042-030G
3c
5e
1a
4d
2b
X4
JY-6351G-02-250
T
R
S
RN
TN
3
21
U6A
4580M
R132
5K11
C58
22P
C103
47u/25V
5
67
U6B
4580M
R159
62K
R155
1K3
R70
20K
R69
20K
C104
47u/25V
C90
0.22u/50V
C89
0.22u/50V
C95
0.22u/50V
R201
6K8
2
1
3
4
X5
JY-5042-030G
3c
5e
1a
4d
2b
X6
JY-6351G-02-250
T
R
S
RN
TN
3
21
U8A
4580M
R136
5K11
C62
22P
C105
47u/25V
5
67
U8B
4580M
R160
62K
R156
1K3
R72
20K
R71
20K
C106
47u/25V
C92
0.22u/50V
C91
0.22u/50V
C96
0.22u/50V
R202
6K8
2
1
3
4
X7
JY-5042-030G
3c
5e
1a
4d
2b
X8
JY-6351G-02-250
T
R
S
RN
TN
LINE IN1
LINE IN2
LINE IN3
LINE IN4
MIC 1
MIC 2
MIC 3
MIC 4
PH PWR
TR1
HR
TR16
A1316
R102
1K50
-VCC
+VCC
R20
2K49
R23
2K49
C5
10N
R87
470R
TR6
HR
TR20
A1316
-VCC
+VCC
3
21
U1A
4580M
5
67
U1B
4580M
C51
22P
C52
22P
R125
5K11
R126
5K11
R22
2K49
-VCC
R21
2K49
TR5
HR
+VCC
R19
2K49
D1
BAS316
+VCC
R61
20K
-VCC
R143
10K0
R144
10K0
R123
5K11
C49
22P
R48
4R7
R49
4R7
C39
1n
C35
1n
C45
1000u/10V
R55
4R7
VR2
O10K
R103
1K50
R13
2K49
C22
330P
C2
10N
R84
470R
R14
2K49
C13
47u/63V
C14
47u/63V
R95
6K34
R96
6K34
C29
22u/35V
C28
22u/35V
R4
6K81
R3
6K81
PH PWR
TR2
HR
TR17
A1316
R104
1K50
-VCC
+VCC
R25
2K49
R28
2K49
C6
10N
R88
470R
TR8
HR
TR21
A1316
-VCC
+VCC
3
21
U3A
4580M
5
67
U3B
4580M
C55
22P
C56
22P
R129
5K11
R130
5K11
R27
2K49
-VCC
R26
2K49
TR7
HR
+VCC
R24
2K49
D2
BAS316
+VCC
R62
20K
-VCC
R145
10K0
R146
10K0
R127
5K11
C53
22P
R50
4R7
R51
4R7
C40
1n
C36
1n
C46
1000u/10V
R56
4R7
VR3
O10K
R105
1K50
R15
2K49
C23
330P
C3
10N
R85
470R
R16
2K49
C15
47u/63V
C16
47u/63V
R97
6K34
R98
6K34
C31
22u/35V
C30
22u/35V
R6
6K81
R5
6K81
PH PWR
TR3
HR
TR18
A1316
R106
1K50
-VCC
+VCC
R30
2K49
R33
2K49
C7
10N
R89
470R
TR10
HR
TR22
A1316
-VCC
+VCC
3
21
U5A
4580M
5
67
U5B
4580M
C59
22P
C60
22P
R133
5K11
R134
5K11
R32
2K49
-VCC
R31
2K49
TR9
HR
+VCC
R29
2K49
D3
BAS316
+VCC
R63
20K
-VCC
R147
10K0
R148
10K0
R131
5K11
C57
22P
R52
4R7
R53
4R7
C41
1n
C37
1n
C47
1000u/10V
R57
4R7
VR4
O10K
R107
1K50
R17
2K49
C24
330P
C4
10N
R86
470R
R18
2K49
C17
47u/63V
C18
47u/63V
R99
6K34
R100
6K34
C33
22u/35V
C32
22u/35V
R8
6K81
R7
6K81
PH PWR
TR4
HR
TR19
A1316
R108
1K50
-VCC
+VCC
R35
2K49
R38
2K49
C8
10N
R90
470R
TR12
HR
TR23
A1316
-VCC
+VCC
3
21
U7A
4580M
5
67
U7B
4580M
C63
22P
C64
22P
R137
5K11
R138
5K11
R37
2K49
-VCC
R36
2K49
TR11
HR
+VCC
R34
2K49
D4
BAS316
+VCC
R64
20K
-VCC
R149
10K0
R150
10K0
R135
5K11
C61
22P
MIC GAIN=0~-60dB
LINE IN GAIN=-15~-40dB
PM16PU1.Sch
Titel
Size
File:
Date: Drawn By: Sheet
RevisionModel No:
15-Jan-2005 TSB.
INPUT STAGE ( CH1-CH4)
11of
ALTO PM16 VER050115
A3
PCB# PM16PU1.PCB
SW1A
PS-22E85L
SW1B
PS-22E85L
LO CUT
SW2A
PS-22E85L
SW2B
PS-22E85L
LO CUT
SW3A
PS-22E85L
SW3B
PS-22E85L
LO CUT
SW4A
PS-22E85L
SW4B
PS-22E85L
PRECH1
PRECH2
PRECH3
PRECH4
84
U3C
4580M
84
U6C
4580M
84
U2C
4580M
C121
100N
C120
100N
C123
100N
C122
100N
C124
100N
C132
100N
84
U5C
4580M
84
U8C
4580M
C125
100N
C133
100N
C126
100N
C134
100N
C127
100N
C135
100N
C128
100N
C136
100N
C129
100N
C137
100N
84
U1C
4580M
84
U4C
4580M
84
U7C
4580M
+VCC
-VCC
PM16PU1
3c
5e
1a
4d
2b
X9
JY-6351G-02-250
T
R
S
RN
TN
INSERT1
INS1
R82
120R
3c
5e
1a
4d
2b
X10
JY-6351G-02-250
T
R
S
RN
TN
INSERT2
INS2
R75
120R
3c
5e
1a
4d
2b
X11
JY-6351G-02-250
T
R
S
RN
TN
INSERT3
INS3
R78
120R
3c
5e
1a
4d
2b
X12
JY-6351G-02-250
T
R
S
RN
TN
INSERT4
INS4
R80
120R
PRECH1
PRECH2
PRECH3
PRECH4
3c
5e
1a
4d
2b
X17
JY-6351G-02-250
DIRECT1
R203
120R
R204
120R
T
R
S
RN
TN
DIR-OUT1
3c
5e
1a
4d
2b
X18
JY-6351G-02-250
DIRECT2
R205
120R
R206
120R
T
R
S
RN
TN
DIR-OUT2
3c
5e
1a
4d
2b
X19
JY-6351G-02-250
DIRECT3
R207
120R
R208
120R
T
R
S
RN
TN
DIR-OUT3
3c
5e
1a
4d
2b
X20
JY-6351G-02-250
DIRECT4
R209
120R
R210
120R
T
R
S
RN
TN
DIR-OUT4
1
2
3
4
5
6
7
8
9
10
11
12
CN1
2.0-12P
(TO PM16MN1)
DIR-OUT1 GND
GND
GND
GND
-VCC GND
+VCC
-VCC
DIR-OUT1
PRECH2
PRECH1
DIR-OUT2
+VCC
DIR-OUT2 GND
1
2
3
4
5
6
7
8
9
10
11
12
CN2
2.0-12P
(TO PM16MN1)
DIR-OUT3 GND
GND
GND
GND
-VCC GND
+VCC
-VCC
DIR-OUT3
PRECH4
PRECH3
DIR-OUT4
+VCC
DIR-OUT4 GND
1
2
3
4
CN3
3.9-4P
(TO PM12PU2)
+VCC
-VCC
PH PWR
1
2
3
4
CN4
3.9-4P
(TO PM12PU1)
4. Schematic Diagram
6

1 2 34
A
B
C
D
4
321
D
C
B
A
PM16MN1.Sch
Titel
Size
File:
Date: Drawn By: Sheet
RevisionModel No:
15-Jan-2005 KEVIN LIN.
MAIN INPUT STAGE
40of
ALTO PM16 VER030319
A4
PCB# PM16MN1.PCB
PM16MN1
CH1
CH1.SCH
CH2
CH2.SCH
CH3
CH3.SCH
CH4
CH4.SCH
84
U3_1C
4580M
C19_1
100n
C18_1
100n +RVCC
-RVCC
84
U3_3C
4580M
C19_3
100n
C18_3
100n R1
47R
C3
47uF
R2
47R
C4
47uF
C1
47uF
C2
47uF PGND
+PVCC
-PVCC
PGNDPGND
1
2
3
4
5
6
7
8
9
10
11
12
CN1
2.0-12P
(TO PM16PU1)
DIR-OUT1 GND
GND
GND
GND
-VCC GND
+VCC
-VCC
DIR-OUT1
PRECH2
PRECH1
DIR-OUT2
+VCC
DIR-OUT2 GND
1
2
3
4
5
6
7
8
9
10
11
12
CN2
2.0-12P
(TO PM16PU1)
DIR-OUT3 GND
GND
GND
GND
-VCC GND
+VCC
-VCC
DIR-OUT3
PRECH4
PRECH3
DIR-OUT4
+VCC
DIR-OUT4 GND
(TO PM12MN2)
AUX1
AUX3
AUX4
AUX2
LEFT-BUS
RIGHT-BUS
SUB1
SUB2
SOLO(PFL)
LOGIC
SUB3
SUB4
AFL-L
AFL-R
-RVCC
+RVCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CN4
CON14
1
2
3
4
CN3
CON4
(TO PM12MN1)
AUX1
AUX3
AUX4
AUX2
LEFT-BUS
RIGHT-BUS
SUB1
SUB2
SOLO(PFL)
LOGIC
SUB3
SUB4
AFL-L
AFL-R
-RVCC
+RVCC
PGND
PGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CN6
CON14
1
2
3
4
CN5
CON4
PGND
PGND
7

12345678
A
B
C
D
8
7654321
D
C
B
A
R18_1
5K1
VR7_1
W50K
AUX1
R8_1
5K1
5
67
U2_1B
4580M
R20_1
10K
C9_1
22P
VR5_1
W50K
C4_1
47uF
R16_1
5K1
AUX3
AUX-POST
R9_1
5K1
R10_1
5K1
LEFT-BUS
RIGHT-BUS
PAN
AUX-PRE
CH1.Sch
Titel
Size
File:
Date: Drawn By: Sheet
RevisionModel No:
15-Jan-2005 KEVIN LIN.
MAIN INPUT STAGE
41of
ALTO PM16 VER030319
A3
21
3
SW5_1A
PS-22E85L
54
6
SW5_1B
PS-22E85L
21
3
SW1_1A
PS-22E85L
54
6
SW1_1B
PS-22E85L
21
3
SW3_1A
PS-22E85L
54
6
SW3_1B
PS-22E85L
54
6
SW6_1B
PS-42E85L
21
3
SW6_1A
PS-42E85L
SUB1
SUB2
R12_1
5K1
R13_1
5K1
AUX1/2 PRE/POST
R4_1
10K
SOLO(PFL)
D1_1
BAS316
LOGIC
LD3_1
YEL
(SOLO)
R23_1
2K2
-RVCC
(LOGIC=2.0V or 0.5V)
84
U2_1C
4580M
84
U1_1C
4580M
C13_1
100n
C14_1
100n
C15_1
100n
C16_1
100n
+VCC
-VCC
LOGIC
PCB# PM16MN1.PCB
EQ HI (12K)
C7_1
6.8n(M) VR1_1
B50K
R25_1
5K6
VR4_1
B50K
R24_1
5K6 LO (80Hz)
R3_1
10K
3
21
U2_1A
4580M
R7_1
1M
C6_1
22P
R5_1
3K9
VR2_1
B50K MID (FREQ=100Hz-8K)
C11_1
33n(M) C12_1
33n(M)
C8_1
6.8n(M)
C3_1
47uF
C2_1
47uF
PRECH1 PRECH1
3
21
U1_1A
4580M
5
67
U1_1B
4580M
R1_1
10K R2_1 10K
C5_1 22P
C10_1
152(M)
R11_1
5K1
R6_1
3K
VR3_1B
500KC
VR3_1A
500KC
R22_1
6K5
C1_1
682(M)
R21_1
6K2
PM16MN1 (CH1)
21
3
SW4_1A
PS-22E85L
54
6
SW4_1B
PS-22E85L
SUB3
SUB4
R14_1
5K1
R15_1
5K1
87
9
SW6_1C
PS-42E85L
11 10
12
SW6_1D
PS-42E85L
AFL-L
AFL-R
R27_1
6K8
R28_1
6K8
VR8_1
W50K
R17_1
5K1
AUX4
AUX-POST
R19_1
5K1
AUX2
VR6_1
W50K
AUX-PRE
2
1
3
SW2_1A
PS-22E85L-2
LD2_1
RED
R26_1
3K3
+RVCC
DIR-OUT1
MUTE
C17_1
100n
84
U4_1C
LM393
R36_1
4K7
+RVCC
R34_1
10K
R33_1
10K
R38_1
10K
R29_1
100K
R31_1
100K C20_1
1uF R30_1
8K2
PGND PGND
PGND
PGND
LD4_1
LED-2P
TR1_1
HR
R32_1
82R
1
2
3
4
8
U4_1A
393
5
67
U4_1B
393 R39_1
27K
R51_1
1K
3
21
U3_1A
4580M
PGND
綠紅
D2_1
4148
D3_1
4148
C22_1
1uF
PGND
D4_1
4148
PGND
+RVCC
TR3_1
7002
R35_1
10K
C21_1
470P
VR10_1A
10KD
5
4
6
SW2_1B
PS-22E85L-2
R40_1
5K1 VR9_1
W50K
R41_1
4K7
R42_1
4K7
LEVEL
PGND PGND
+RVCC
PGND
PGND
8

12345678
A
B
C
D
8
7654321
D
C
B
A
R18_2
5K1
VR7_2
W50K
AUX1
R8_2
5K1
5
67
U2_2B
4580M
R20_2
10K
C9_2
22P
VR5_2
W50K
C4_2
47uF
R16_2
5K1
AUX3
LEVEL
AUX-POST
R9_2
5K1
R10_2
5K1
LEFT-BUS
RIGHT-BUS
PAN
AUX-PRE
CH2.Sch
Titel
Size
File:
Date: Drawn By: Sheet
RevisionModel No:
15-Jan-2005 KEVIN LIN.
MAIN INPUT STAGE
42of
ALTO PM16 VER030319
A3
21
3
SW5_2A
PS-22E85L
54
6
SW5_2B
PS-22E85L
21
3
SW1_2A
PS-22E85L
54
6
SW1_2B
PS-22E85L
21
3
SW3_2A
PS-22E85L
54
6
SW3_2B
PS-22E85L
54
6
SW6_2B
PS-42E85L
21
3
SW6_2A
PS-42E85L
SUB1
SUB2
R12_2
5K1
R13_2
5K1
AUX1/2 PRE/POST
R4_2
10K
SOLO(PFL)
D1_2
BAS316
LOGIC
LD3_2
YEL
(SOLO)
R23_2
2K2
-RVCC
(LOGIC=2.0V or 0.5V)
84
U2_2C
4580M
84
U1_2C
4580M
C13_2
100n
C14_2
100n
C15_2
100n
C16_2
100n
+VCC
-VCC
LOGIC
PCB# PM16MN1.PCB
EQ HI (12K)
C7_2
6.8n(M) VR1_2
B50K
R25_2
5K6
VR4_2
B50K
R24_2
5K6 LO (80Hz)
R3_2
10K
3
21
U2_2A
4580M
R7_2
1M
C6_2
22P
R5_2
3K9
VR2_2
B50K MID (FREQ=100Hz-8K)
C11_2
33n(M) C12_2
33n(M)
C8_2
6.8n(M)
C3_2
47uF
C2_2
47uF
PRECH2 PRECH2
3
21
U1_2A
4580M
5
67
U1_2B
4580M
R1_2
10K R2_2 10K
C5_2 22P
C10_2
152(M)
R11_2
5K1
R6_2
3K
VR3_2B
500KC
VR3_2A
500KC
R22_2
6K5
C1_2
682(M)
R21_2
6K2
PM16MN1 (CH2)
21
3
SW4_2A
PS-22E85L
54
6
SW4_2B
PS-22E85L
SUB3
SUB4
R14_2
5K1
R15_2
5K1
87
9
SW6_2C
PS-42E85L
11 10
12
SW6_2D
PS-42E85L
AFL-L
AFL-R
R27_2
6K8
R28_2
6K8
VR8_2
W50K
R17_2
5K1
AUX4
AUX-POST
R19_2
5K1
AUX2
VR6_2
W50K
AUX-PRE
2
1
3
SW2_2A
PS-22E85L-2
LD2_2
RED
R26_2
3K3
+RVCC
DIR-OUT2
MUTE
C17_2
100n
84
U4_2C
LM393
VR10_2A
10KD
5
4
6
SW2_2B
PS-22E85L-2
R40_2
5K1 VR9_2
W50K
R41_2
4K7
R42_2
4K7
R36_2
4K7
+RVCC
R34_2
10K
R33_2
10K
R38_2
10K
R29_2
100K
R31_2
100K C20_2
1uF R30_2 8K2
PGND PGND
PGND
PGND
LD4_2
LED-2P
TR1_2
HR
R32_2
82R
1
2
3
4
8
U4_2A
393
5
67
U4_2B
393 R39_2
27K
R51_2
1K
5
67
U3_1B
4580M
PGND
綠紅
D2_2
4148
D3_2
4148
C22_2
1uF
PGND
D4_2
4148
PGND
+RVCC
TR3_2
7002
R35_2
10K
C21_2
470P
PGND PGND
+RVCC
PGND
PGND
9