Alto PM-6 Service Manual
MODEL: PM-6
www.altoproaudio.com
Version 1.0
CONTENT
1. Introduction.............................................................................................1
2. Specification............................................................................................2
3. Block Diagram.........................................................................................3
4. Schematic Diagram.................................................................................4
5. Wiring Diagram......................................................................................12
6. Printed Circuit Board..........................................................................14
7. Exploded View & Mechanical Parts List.................................................19
8. Electrical Parts List.............................................................................23
1. Introduction
˙ 2 mono inputs with gold plated XLR and balanced TRS jack
˙ TRIM and +18V phantom Power for mono inputs
˙ 2 stereo inputs with balanced TRS jack
˙ Peak LED in each channel
˙ Very effective 3-band EQ
˙ 1 POSTFADER AUX send for effects send can be changed in PRE-FADER
send for monitoring
˙ 24-bit internal DSP with 16 effects, with FX Level and REVERB LEVEL
controls.
˙ Stereo AUX return DFX with level and routing to AUX1
˙ Discrete output level for Phones/Control Room
˙ Balanced TRS jack output
˙ Dynamic power: 2×80W @ 4Ω
- 1 -
2. Specification
Mono input channels
Stereo input channels
Impedances
Equalization
DSP SECTION
Microphone input
Frequency response
Distortion (THD & N)
Gain range 0dB to 44dB (MIC)
SNR (Signal to Noise Ratio)
Line input
Frequency response
Distortion (THD & N)
Sensitivity range
Line input
Frequency response
Distortion (THD & N)
Microphone input
All other inputs
Tape out
All other output
Hi shelving
Mid bell
Low shelving
A/D and D/A converters
DSP resolution
Type of effects
electronically balanced, discrete input configuration
10Hz to 55kHz, + 3dB
0.005% at 4dBu, 1kHz+
>100dB
electronically balanced
10Hz to 55kHz, 3dB
0.005% at 4dBu, 1kHz+
+
15dBu to +/ 30dBu
Balanced
10Hz to 55kHz, 3dB
0.005% at +4dBu, 1kHz
1.4kOhm
+
+
10kOhm or greater
1kOhm
120Ohm
+
15dB @12kHz
12dB @2.5kHz
+
+
15dB @80Hz
24 bit
24 bit
Vibraflange, Funky, Rockabilly, Bigstage, Vibrato 1-4
Flanger 1-4, Chorus 1-4
Main Mix Section
Power AMP section
Power supply (AC/DC)
Physical
Presets
Controls
Noise (Bus noise)
Max output
AUX Returns gain range
AUX Sends max out
Power AMP output
Main voltage
Max Power Consumption
Dimension (W D H)
Net weight(with power supply)
Gross weight 3.49kg (7.70 lb)
16
16-position PRESET Selector, FX level, REVERB
level, CLIP LED
Fader 0 dB, channels muted: 100dBr (ref.:+4dBu)
Fader 0dB, all input and set to UNITY gain: -90dBr
(ref.: +dBu) channels assigned
+22dBu unbalanced, 1/4" jacks
- to +15dB
+22dBu
RMS: 2 50W @4Ohm
EIAJ: 2 51W @4Ohm
USA/Canada 100 - 120V ~, 60Hz
Europe 210 - 230V ~, 50Hz
U.K./Australia 240V ~, 50Hz
130 watts
185mm 247mm 72mm
2.95kg (6.50 lb)
: 2 80W @4OhmDynamic Power
- 2 -
3. Block Diagram
D
8
C
B
A
AUX SEND
AUX SEND
TRS
7654321
AUX-1
EFX SEND
EFX SEND
AUX-1
RIGHT-BUS
LEFT-BUS
PAN LEFT-BUS
RIGHT-BUS
MAIN MIX
MAIN OUT
LEVEL
MAIN MIX LEFT
TRS
LEFT-BUS
TRS
RIGHT-BUS
MAIN MIX RIGHT
LEFT
TRS
SPEAKERS OUT
TRS
RIGHT
LEFT
RIGHT
PHONES
TRS
TRS
LEFT
RIGHT
TRS
PHONES OUTPUT
2-TRACK
TAPE IN TAPE OUT
1
2
2TK TO MIX
1
3
1
LEFT-BUS
1
2
3
2TK TO CTRL ROOM
RIGHT-BUS
3
3
2
2
CONTROL ROOM OUTPUT
CONTROL ROOM
LEFT METER
& PHONES
RIGHT METER
EFX SEND
AUX-1
RIGHT-BUS
LEFT-BUS
AUX-1
AUX1
2
2
PRE1
POST1
LEFT-BUS
BALANCE
RIGHT-BUS
AUX-1
AUX1
2
2
PRE1
POST1
LEFT-BUS
RIGHT-BUS
AUX-1
LEVEL
LEVEL
+/-15dB
3-BAND EQ
80 2.5K 12K
LO MID HI
GAIN
213
+18V
POWER
PHANTOM
MONO INPUT CHANNELS ( 1-2 )
MIC IN
D
SG/OL
LEFT(MONO)
80 2.5K 12K
RN
RTNTNTT
3c5e1a4d2b
EQ
RIGHT
+/-15dB
3-BAND EQ
80 2.5K 12K
LO MID HI
R
RN
3c5e1a4d2b
LINE IN
MIC GAIN:0~44dB
LINE IN TRIM:+15~-30dB
STEREO INPUT CHANNELS ( 3-6 )
C
SG/OL
AUX RETURN1
R
3c5e1a4d2b
STEREO AUX RETURN 1
B
RN
LEFT
RTNTNTT
3c5e1a4d2b
AUX1
DSP BOARD
RN
FX LEVEL
PRESETS
RIGHT
REVERB LEVEL
1 2 3 4 5 6 78
A
- 3 -
4. Schematic Diagram
C11
470P
R1
X1
MIC 1
JY-5042-030G
D
LINE IN1
MIC GAIN=0~-60dB
LINE IN GAIN=+15~-45dB
X3
JY-6351G-02-250
X2
MIC 2
JY-5042-030G
LINE IN2
X4
JY-6351G-02-250
C
LINE IN 3/4
LEFT(MONO)
X5
JY-6351G-02-250
RIGHT
X6
JY-6351G-02-250
B
LINE IN 5/6
LEFT(MONO)
X7
JY-6351G-02-250
A
RIGHT
X8
JY-6351G-02-250
1 2 3 4 5 6 7 8
4R7
4
2
3
1
R3
4R7
3c
R
4d
RN
2b
TN
1a
T
5e
S
C5
470P
C3
470P
R2
4R7
4
2
3
1
R5
4R7
3c
R
4d
RN
2b
TN
1a
T
5e
S
C4
470P
3c
R
4d
RN
2b
TN
1a
T
5e
S
3c
R
4d
RN
2b
TN
1a
T
5e
S
3c
4d
RN
2b
TN
1a
T
5e
S
3c
R
4d
RN
2b
TN
1a
T
5e
S
R15
51K1
R6
51K1
C169
100P
C170
100P
C171
100P
C172
100P
C173
100P
C174
100P
R11
51K1
R8
51K1
C175
100P
C176
100P
C2
22u/35V
C15
470P
PH PWR
2K7 1/4W
22u/35V
C9
22u/35V
C6
470P
PH PWR
2K7 1/4W
22u/35V
R7
C1
R10
C10
R113
10K0
R114
C26
22P
R122
10K0
R123
C31
22P
R121
10K0
R130
C34
22P
R131
R132
C35
22P
10K0
10K0
10K0
10K0
10K0
R35
7K15
C8
47u/50V
R9
2K7 1/4W
C7
47u/50V
R12
7K15
R14
7K15
C12
47u/50V
R13
2K7 1/4W
C13
47u/50V
R16
7K15
2
3
6
5
2
3
6
5
R115
10K0
R124
10K0
R133
10K0
R134
C27
22P
C32
22P
C36
22P
10K0
U8C
4580M
8
D
C
C201
100n
84
C202
100n
B
A
7654321
VR15
C121
R201
8K06
R202
8K06
1
47u/25V
R191
7
47u/25V
EQ HI
12KHZ
MID
2.5K
80HZ
EQ HI
12KHZ
MID
2.5K
80HZ
2
3
6
5
R88
6K8
TR15
BR
R190
1M
C76
10K0
1M
C84
LO
LO
R139
R140
10K0
C109
33n(M)
(SOLTON 1K2)用
C111
33n(M)
4580M
U9B
4580M
18n(M)
R94
910R
R77
6K8
C122
18n(M)
R98
910R
R81
6K8
C154
22P
U9A
C155
22P
TR16
BR
PGND
R106
R69
R108
1K1
R72
1K3
R211
36K
1
R210
36K
7
R197
LD3
RED
1K1
1K3
1K50
U1A
4580M
3
VR12
O10K
R4
27R
C19
VR13
O10K
R22
27R
C17
C61
C72
47u/25V
C81
C82
47u/25V
2
6
5
3
2
6
5
R23
20K
R26
20K
PRE-CH7
R27
20K
PRE-CH8
R28
20K
R49
3K6
C16
47P
1000u/10V
R19
3K6
R18
3K6
C14
47P
1000u/10V
R17
3K6
R116
10K0
47u/25V
1
U7A
4580M
C33
22P
R125
10K0
7
U7B
4580M
R136
10K0
47u/25V
1
U10A
4580M
R135
10K0
7
U10B
4580M
U1B
4580M
U4A
4580M
U4B
4580M
PRE-CH5
PRE-CH6
C21
22P
R55
5K11
C22
22P
R54
5K11
C18
22P
R39
5K11
C20
22P
R34
5K11
1
R62
10K0
7
10K0
1
R37
10K0
7
10K0
PRE-CH5
PRE-CH6
R63
R38
EQ HI
12KHZ
MID
2.5K
80HZ
EQ HI
12KHZ
MID
2.5K
80HZ
R56
C23
5K11
22P
R36
C24
5K11
22P
C123
VR5A
18n(M)
B50K
R107
1K1
R70
1K3
R96
910R
VR7A
R84
B50K
6K8
LO
C114
33n(M)
C124
VR5B
18n(M)
B50K
R109
1K1
R73
1K3
R100
910R
VR7B
R85
B50K
6K8
LO
C113
33n(M)
VR6A
B50K
C128
12n(M)
VR6B
B50K
C130
12n(M)
3
2
5
6
C135
18n(M)
C140
12n(M)
R97
910R
R86
6K8
C115
33n(M)
R126
10K0
C136
18n(M)
C142
12n(M)
R101
910R
R87
6K8
C116
33n(M)
R127
10K0
U2A
4580M
R58
5K11
C25
22P
U2B
4580M
5K11
1
7
C30
22P
R61
C62
47u/25V
C73
47u/25V
PRE-CH7
PRE-CH8
2
3
6
5
EQ HI
MID
2.5K
80HZ
EQ HI
MID
2.5K
80HZ
C52
47u/25V
R20
C53
47u/25V
4580M
4580M
LO
LO
20K
R24
20K
20K
R248
47K
R249
47K
C75
47u/25V
C83
47u/25V
LEVEL
LEVEL
R179
4K7
2
3
6
5
C65
47u/25V
C66
47u/25V
4580M
4580M
VR1A
W50K
VR1B
W50K
C147
2.2u/50V
C157
U11A
C160
U11B
22P
22P
U8A
U8B
C153
22P
C156
22P
R189
1M
C125
18n(M)
R102
910R
R89
6K8
C117
33n(M)
C126
18n(M)
R104
910R
R90
6K8
C118
33n(M)
R187
1M
1
C64
47u/25V
R117
10K0
R128
10K0
7
C74
47u/25V
R110
1K1
R74
1K3
R111
1K1
R75
1K3
VR8A
B50K
VR10A
B50K
VR8B
B50K
VR10B
B50K
VR9A
B50K
C131
12n(M)
VR9B
B50K
C132
12n(M)
C137
18n(M)
C143
12n(M)
R103
910R
R91
6K8
C120
33n(M)
R138
10K0
C144
12n(M)
R105
910R
R92
6K8
C119
33n(M)
R137
10K0
C138
18n(M)
R242
20K
R243
B50K
VR14
B50K
VR16
B50K
VR19
B50K
47u/25V
R118
10K0
C77
47u/25V
+VCC
PEAK
VR17
B50K
12n(M)
VR20
B50K
12n(M)
C68
R250
C127
C129
R244
20K
R245
20K
47K
R251
47K
R119
10K0
C134
18n(M)
C139
12n(M)
R95
910R
R78
6K8
C110
33n(M)
R112
10K0
C133
18n(M)
C141
12n(M)
R99
910R
R82
6K8
C112
33n(M)
R120
10K0
LEVEL
LEVEL
R182
4K7
R176
4K7
BAL
R180
4K7
J3
R227
5K11
C78
47u/25V
VR2A
W50K
C79
47u/25V
VR2B
W50K
2.2u/50V
C56
47u/25V
C69
47u/25V
POST
(PRE)
C148
VR21
B50K
R204
R203
8K06
R170
R171
R224
8K06
6
5
68K
6
5
68K
5K11
R228
5K11
TR17
BR
4580M
2.2u/50V
4580M
2.2u/50V
AUX-POST
VR28
W50K
2
3
6
5
4580M
R93
6K8
U3B
C145
R172
4K7
U6B
C146
R177
4K7
C149
22P
R186
1M
C150
22P
R188
1M
RIGHT-BUS
4580M
U12B
TR18
BR
47u/25V
7
47u/25V
7
LEFT-BUS
AUX-1
C158
22P
U12A
C159
22P
PGND
C57
R79
TR11
BR
C70
R83
TR13
BR
R213
36K
1
R214
36K
7
R198
1K50
6K8
6K8
LD4
RED
R141
10K0
C85
47u/25V
LEVEL
LEVEL
C80
47u/25V
+VCC
PEAK
TR12
BR
TR14
BR
C58
47u/25V
VR24
W50K
R193
27K
PGND
C59
47u/25V
VR26
W50K
R194
27K
PGND
R129
10K0
R195
1K50
LD1
RED
R196
1K50
LD2
RED
R199
8K06
PEAK
R200
PEAK
R181
4K7
BAL
R183
4K7
J4
C60
47u/25V
J1
C71
47u/25V
J2
POST
(PRE)
POST
(PRE)
U10C
4580M
U2C
4580M
R173
4K7
PAN
VR18
B50K
R174
4K7
R220
7K15
R175
4K7
R178
4K7
R225
7K15
84
84
C180
100n
C192
100n
C185
100n
C186
100n
PAN
R221
5K11
AUX-POST
VR25
W50K
5K11
VR22
B50K
R226
5K11
AUX-POST
VR27
W50K
84
U11C
4580M
84
U3C
4580M
C151
22P
R209
2
3
+VCC
8K06
2
3
+VCC
+VCC
-VCC
+VCC
-VCC
36K
1
U3A
4580M
C152
22P
R212
36K
1
U6A
4580M
C179
100n
84
U9C
4580M
C189
100n
C184
100n
84
U1C
4580M
C183
100n
PM6.S01 PM6.S02 PM6.S03
R229
5K11
LEFT-BUS
VR23
B50K
RIGHT-BUS
R231
5K11
POST
AUX-POST
VR29
W50K
AUX-1
(PRE)
R230
5K11
R223
5K11
R222
C181
100n
C195
100n
C187
100n
C188
100n
LEFT-BUS
RIGHT-BUS
AUX-1
LEFT-BUS
RIGHT-BUS
AUX-1
U12C
4580M
U4C
4580M
PM6(1/4)
U7C
4580M
U6C
4580M
C199
100n
84
C200
100n
C196
100n
84
C197
100n
C182
100n
84
C198
100n
C190
100n
84
C191
100n
- 4 -
7654321
8
PM6 (2/4)
PHONES
R262
120R
R263
120R
R268
120R
R267
120R
R269
120R
R270
120R
R272
120R
R271
120R
R277
1K
R278
1K
2TK-IN-L
2TK-IN-R
2TK-IN-L
2TK-IN-R
3c
4d
2b
1a
5e
X9
JY-6351G-02-250
CTRL ROOM L
3c
R
4d
RN
2b
TN
1a
T
5e
S
X11
JY-6351G-02-250
CTRL ROOM R
3c
R
4d
RN
2b
TN
1a
T
5e
S
X12
JY-6351G-02-250
MAIN L (UNBAL)
3c
R
4d
RN
2b
TN
1a
T
5e
S
JY-6351G-02-250
X13
MAIN R (UNBAL)
3c
R
4d
RN
2b
TN
1a
T
5e
S
JY-6351G-02-250
X17
SCP6873NS3232
6
X14
TAPE INTAPE OUT
14
25
D
C
B
L(WHITE)
R(RED)
3
A
L-METER
C89
R-METER
47u/25V
CN1
1
2
3
4
5
6
7
8
2.5-8P
CONTROL
ROOM
C90
VR4B
W50K
VR4A
W50K
DGND
R206
8K06
2
3
R205
8K06
6
5
C164
22P
6
5
U18B
4580M
C167
22P
2
3
U18A
4580M
+VCC -VCC PH PWR
+5VD
PGND
C39
22P
U15B
4580M
U15A
4580M
R238
6K04
7
C102
47u/25V
R239
6K04
1
C101
47u/25V
C40
22P
R215
47u/25V
1
R217
36K
7
C95
47u/25V
MAIN MIX
R274
27K
MAIN MIX
R275
27K
6
4
3
1
36K
C91
R142
10K0
LEFT
RIGHT
SW1B
PS-22E85L
SW1A
PS-22E85L
R145
10K0
47u/25V
47u/25V
5
2
C161
C94
VR11B
W50K
C103
VR11A
W50K
R44
5K11
22P
R143
10K0
C162
22P
R144
10K0
2
3
2
3
R207
8K06
R208
8K06
Q1
1815
C2E
B
1
U16A
BA15218N
U17A
BA15218N
2
3
6
5
3
C28
47u/25V
6
1
5
6
1
5
C165
22P
U19A
4580M
C168
22P
U19B
4580M
PGND
BA15218N
BA15218N
MOUT-L
R218
36K
1
MOUT-R
R219
36K
7
C29
47u/25V
U16B
U17B
R259
120R
7
R260
120R
R261
120R
7
R266
120R
C96
47u/25V
R146
10K0
C104
47u/25V
R149
10K0
CN3
1
2
3
3P-2.5
C217
100n
C218
100n
PHONES/
R257
27K
47u/25V
R258
27K
LEFT-BUS
RIGHT-BUS
C37
U13A
4580M
U13B
4580M
47u/25V
1
U21A
4580M
2TK TO MIX
VR32A
W50K
R148
10K0
VR32B
W50K
R237
5K11
84
U18C
4580M
22P
C38
22P
C92
R236
5K11
C209
100n
C210
100n
R255
270K
1
47u/25V
R256
270K
7
47u/25V
AUX-SEND1
R29
20K
C88
C93
U19C
4580M
R232
5K11
R233
5K11
AUX-SEND1
84
LEFT-BUS
RIGHT-BUS
R265
120R
R264
120R
3
2
1
SW4A
PS-22E85L
6
5
4
SW4B
PS-22E85L
C211
100n
C212
100n
3c
R
4d
RN
2b
TN
1a
T
5e
S
JY-6351G-02-250
2TK TO CR-L
LEFT-BUS
2TK TO CR-R
RIGHT-BUS
P
84
U21C
4580M
LEFT-BUS
RIGHT-BUS
X10
C215
100n
C216
100n
AUX SEND1
C42
MOUT-L
10u/63V
C46
MOUT-R
10u/63V
C51
100n
84
U5C
4580M
C54
100n
R40
36K
R41
36K
R42
10K
R43
10K
+VCC
-VCC
2
3
L1
R67
36K
6
R1
5
R71
36K
C48 680P
D9
5V1
D10
5V1
R66
10K
U5A
4580M
C49 680P
D11
5V1
R281
47R
R280
47R
D12
5V1
R68
10K
U5B
4580M
BA15218N
2TK TO
CTRL ROOM
2TK TO CR-L
2TK TO CR-R
C44
1
3
1
10u/63V
C47
7
6
4
10u/63V
84
U16C
U17C
BA15218N
SW3A
PS-22E85L
SW3B
PS-22E85L
SW2A
SW PS-22E85L-2
2
5
SW2B
SW PS-22E85L-2
C105
47u/25V
84
C106
47u/25V
AUX RETURN 1
C86
C204
100n
C203
100n
AUX-1
2TK-IN-L
2TK-IN-R
47u/25V
C230
100P
C87
47u/25V
C231
100P
C98
47u/25V
C177
100P
C97
47u/25V
C178
100P
84
U14C
4580M
D
C
B
+VCC
A
-VCC
2TK-IN-L
2TK-IN-R
84
U13C
4580M
AUX-RTN1-L
AUX-RTN1-R
R254
180K
R246
R253
180K
R30
20K
10K0
R31
20K
C206
100n
C205
100n
22K
R247
22K
R33
10K0
R32
2
3
VR3A
W50K
VR3B
W50K
AUX-1
6
5
U15C
4580M
R216
43K
U14A
4580M
84
2
3
U14B
4580M
C207
100n
C208
100n
2
3
6
5
C41
22P
C163
22P
C99
47u/25V
7
C166
22P
C100
47u/25V
1
R147
10K0
1 2 3 4 5 6 78
- 5 -
D
4
C
B
A
321
PM6 (3/4)
+VCC
R286
-VCC
LEFT METER
RED
LD14
YEL
LD13
GR
LD12
GR
LD11
GR
LD10
GR
(-30) (-10) (-4) (0) (+10) (+18)
LD9
14
1
U24C
14
U24B
1
14
1
2K
U25C
U25B
U23C
U23B
LM339
LM339
LM339
LM339
LM339
LM339
GR
LD19
PWR ON
8
9
6
7
8
9
6
7
8
9
6
7
PGND
+VCC
C107
+VCC
47R
PH PWR
4K7
R184
LD6
PGND
RED
R282
C219
100n
47u/25V
C108
PGND
47u/25V
-VCC
47R
R283
100n
C220
PHANTOM
312
U25E
LM339
312
U24E
312
U23E
84
U22C
C239
47P
D4
RLS4148
LM339
LM339
4580M
7
6
R304
10K0
PGNDPGND
PGND
4580M
R302
C237
47u/25V
100K
D5
RLS4148
U22B
5
R290
R292
R289
R291
R288
R285
R287
22K
5K6
3K9
820R
820R
560R
47R
-VCC
RIGHT METER
LD25
U25D
U25A
U24D
U24A
U23D
U23A
LM339
13
LM339
LM339
13
LM339
LM339
13
LM339
2
2
2
10
11
4
5
10
11
4
5
10
11
4
5
RED
LD24
YEL
LD23
GR
LD22
GR
LD21
GR
LD20
GR
TR21
+VCC
HR
R284
120R
D
R52
470R
PGND
R53
470R
HR
TR22
R151
10K0
PGND
D1B
R273
120R
DA204K
DA204K
D1A
C238
47P
D2
RLS4148
R299
C
B
2
100K
L-METER
D3
1
3
RLS4148
U22A
4580M
R301
R303
10K0
C236
100K
PGND
47u/25V
R300
A
100K
1 2 34
R-METER
- 6 -
D6
TR2
BR
7654321
L1
8
PM6 (4/4)
D
D7
STEREO AUX
100K
RLS4148
D14
RLS4148
D15
RLS4148
R21
5K11
R25
5K11
RETURN1
3c
4d
EFXRTN-L
2b
1a
LEFT 1
AUX-RTN1-L
5e
X15
JY-6351G-02-250
C
3c
4d
EFXRTN-R
2b
1a
RIGHT 1
AUX-RTN1-R
5e
X16
C240
4.7uF
47uF/50V
D13
RLS4148
C242
4.7uF
+VCC
C50
R80
R76
200K
-VCC
TR1
BR
R152
5K11
TR19
BR
TR20
BR
R157
5K11
R1
FX LEVEL
REVERB LEVEL
VR30
W50K
VR31
W50K
C250
4.7uF
C251
4.7uF
7
1
C243
1.5nF
R153
10K0
U29B
4580M
C245
1.5nF
R160
10K0
U29A
4580M
R154
10K0
6
5
R161
10K0
2
3
C246
33P
C247
33P
R155
10K0
R163
10K0
GND
CN2
HEADER 8X2
12
34
56
78
910
1112
1314
1516
+5VD
C229
100n
+5VD
AR1
680R*4
EN1
1 2
3 4
5 6
7 8
SDB161PVB15FS
1
1
2
2
3
4
4
8
VARIATION
COM
DGND
D
C
JY-6351G-02-250
RLS4148
84
U29C
4580M
C249
10uF
C224
100n
C225
100n
JP1
PGND
U31C
4580M
B
84
84
U32C
LM393
C43
22P
R309
C241
AUX-SEND1
B
AUX-SEND1
4.7uF
R156
10K0
+VCC
6
5
2K2
U31B
4580M
C244
1.5nF
7
UDASP IN/OUT SECTION
MUTE(GLOW)
PEAK(FLICKER)
LD8
RED
R185
4K7
1
U32A
LM393
C222
100n
3
2
R279
1K
R158
10K0
R159
10K0
R192
1M
7
2
3
R310
2M2
U32B
LM393
C45
22P
R162
10K0
U31A
4580M
R311
7K5
5
6
1
R312
220R
R315
820K
D8A
RB400D
DGND
+VCC
-VCC
A
1 2 3 4 5 6 78
A
- 7 -
change value of C9 to 1uF (030326)
change R5,7,8,9,10,11,12,13 to
1.5K (030326)
- 8 -
D
C
B
A
1234567
CN3
2.5-8P
4
+17V
+5VD
+5VD
TR4
+17V
TP3
7805
+17V
C10
1000uF/16V
C3
47uF/25V
D5
1N4002
PGND
PGND
PM6FILTER(1/1)
321
+18V
PGND
C6
100nF/50V
C5
47uF/25V
-17V
PGND
PGND
8
+18V
C4
47uF/25V
D10
1N4002
-17V
TP4
-17V
D4
1N4002
D8
D3
1N4002
TR3
MC78L18ACP
TR1
7815A
C1
220uF/35V
L2
3.5mH
D2
1N4002
TP1
+24VDC
1N4002
PGND
C2
220uF/35V
TP2
-24VDC
L1
D6
TR2
7915A
3.5mH
1N4002
D9
1N4002
1 2 34
123
CN1
D
C
3P-2.5
B
A
- 9 -
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