Symetrix 524E, 1D02 Schematic
INPUT 1
INPUT 2
R189
470K
R257
1K5
MONO
+15
1
2
3
4
R255
3K3
J1
J4
+15
1N4148
D37
ON
SW9
SW DIP4
+15
MALE IEC
POWERCORD
CONNECTOR
J11
CON IEC PCB
1
2
3
-15+15
8
7
6
5
R259
10K
100/35V
R258
4K7
STEREO
2 WAY
3 WAY
4 WAY
R254
47K
2 1
2
OPTIONAL
A.C.SWITCH
C83
-15
.1
MONO
P1
.5A FUSE (117V)
.25A FUSE (220V)
SW7A
SW PWR SEL
R27
1K00
Q1
2N4401
R188
1K0
BP48
3
1
1
2
R253
1K00
1K00
1K00
10K
SW8
R29
R80
R82
.001
Q23
C33
R256
2N4401
\STEREO
10K
.001
MUTE
MONO
+15
1
U42A
4
7
4071
5
6
P2
110V <--> 220V
A.C. RANGE
SELECT SW.
4
U13A
1
LF353N
8
SIGNAL PRESENT
OUTPUT 1
C97
2.2/25T
R191
22
R192
10K
Q10
2N4401
U13B
7
LF353N
SIGNAL PRESENT
OUTPUT 2
2.2/25T
R199
22
R194
10K
Q11
2N4401
-24
4
U43A
1
LF353N
8
SIGNAL PRESENT
OUTPUT 3
C96
2.2/25T
R201
22
R195
10K
Q12
2N4401
U43B
7
LF353N
SIGNAL PRESENT
OUTPUT 4
C95
2.2/25T
R204
22
10K
R197
Q13
2N4401
524_1D2.SCH
C22
1.0/35T
R47
1K8
J3
CONN XLR-M
C47
1.0/35T
R100
1K8
J10
CONN XLR-M
C85
C56
1.0/35T
R117
1K8
J6
CONN XLR-M
C63
1.0/35T
R127
1K8
J7
CONN XLR-M
D49
GRN
R193
+24
22
R190
2K0
Q2
2N4401
D50
RED
MUTE
+24
D51
GRN
R206
+24
22
R207
2K0
Q4
2N4401
D52
RED
MUTE
+24
D53
GRN
R202
+24
22
R200
2K0
Q6
2N4401
D54
RED
MUTE
+24
D55
GRN
R205
+24
22
R203
2K0
Q8
2N4401
D56
RED
MUTE
+24
REVDocument NumberSize
D.2D
1of 1Sheet August 25, 1993Date:
D9
1N4148
10K
-24
R216
15K
R215
10
RELAY DPDT
MUTE 1
SW5A
SW DPDT
R99
10K
R217
15K
R218
MUTE 2
SW10A
SW DPDT
10K
R219
15K
R220
10
MUTE 3
SW6A
SW DPDT
10K
R221
15K
R222
10
MUTE 4
SW11A
SW DPDT
R404
100K
K4
RZ-24
R227
1
10K
3
SHOWN
OUT
D18
1N4148
10
R405
100K
K1
RELAY DPDT
RZ-24
R225
10K
1
3
SHOWN
OUT
D20
1N4148
R406
100K
K2
RELAY DPDT
RZ-24
R196
1
10K
3
SHOWN
OUT
D22
1N4148
K3
RELAY DPDT
RZ-24
SHOWN
OUT
R198
1
10K
3
524E MOTHERBOARD SCHEMATIC
2
3
6
5
2
3
6
5
R407
100K
1K8
R166
1K8
HP-C OUT
.1
R292
12K
R291
10KB
ADJ.PHASE
BP8
U18B
SW06
6 7
11 10
SW06
U18C
R97
12K
R293
10KB
2/4 WAY
-15
R295
12K
R294
10KB
ADJ.PHASE
+15
U30B
7
RC4560
B
A
JP1
PHASE
SW4A
3
1
SW4B
4
6
6dB G.RED.
-15
THRESHOLD
BP33
A
.1
BP9
8
9
ADJ.PHASE
5
6
3
2
2
5
D46
D48
RED
C16
10pF
R41
110K
-15
4
RC4560
2
1
3
U3A
8
+15
1
R249
1
1
22K
U38A
5
LM13700
6
-15
Q22
2N4403
C3
.47/35T
-15
C42
10pF
R92
110K
U3B
6
7
5
RC4560
1
6
U38B
12
LM13700
2N4403
C31
.47/35T
-15
C70
10pF
R142
110K
-15
4
U23A
2
1
3
RC4560
8
+15
+15
1
1
1
U37A
5
LM13700
6
-15+15
2N4403
C66
.47/35T
-15
C98
47pF
R285
10K
U31B
7
RC4560
R180
2K0
R179
13K
+15
R165
.022 MY
D32
7
1N4148
Q21
Q20
50K TRIM
1M5
C75
.1BP3
+15
R17
3K3
R250
22K
R70
3K3
-15
100K TRIM
GAIN TRIM
R176
1K0
R177
R287
1K0
D.C. OFFSET
C18
R42
47/63V
12K
C17
47/63V
R46
220K
BP4
.1
R18
3K3
R16
10K
C24
47pF
-15
4
U9A
2
1
3
LF353N
8
+15
C44
R93
47/63V
12K
C43
47/63V
R98
220K
R71
3K3
R69
10K
C49
47pF
U9B
6
7
5
LF353N
C72
R143
47/63V
12K
C71
47/63V
R251
22K
2
3
R284
130K
R283
+15
3
1
D33
1N4148
R147
220K
R133
3K3
R132
10K
C73
47pF
4
U27A
1
LF353N
8
R173
110K
2
6
5
U37B
14
15
13
-15
1
6
LM13700
.47/35T
C79
U23B
RC4560
12
C76
10pF
-24
7
Q19
2N4403
PHASE
SW1A
3
2
1
SW1B
4
5
6
BP26
-15
.1
4
U10A
2
3
R24
820
6
5
LF353N
3
1
4
6
-15
-24
2
3
R77
820
6
5
R182
3
1
4
6
-24
2
3
R136
820
6
5
R154
R252
22K
R161
3K3
R25
15K
R55
100
PHASE
LF353N
100
PHASE
100
8
SW2A
SW2B
4
8
R78
15K
SW3A
SW3B
4
8
R137
15K
LF353N
6
5
U10B
LF353N
U22B
U28A
LF353N
U28B
LF353N
.1
2
5
U22A
2
5
C81
47/63V
C80
47/63V
R23
1
1K8
-15
R22
7
1K8
BP31
LIMIT 2
.1
R76
1
1K8
-15
R75
7
1K8
LIMIT 3
6dB G.RED.
1K8
1
R184
-15
BP42
BP41
7
R183
1K8
CH4 OUT
SELECT
R174
R185
220K
R162
3K3
R160
10K
C82
47pF
U27B
7
LF353N
R43
12K
U8B
RC4560
6
7
5
615141312111019 8 7 6 5 4 3 2 1
R305
220K
6dB G.RED.
D40
GRN
+15
BP25
.1
D41
RED
THRESHOLD
BP21
.1
R94
-15
12K
4
U14A
2
1
3
RC4560
8
+15
.1
R304
220K
BP22
6dB G.RED.
D42
GRN
BP32
.1
D43
RED
THRESHOLD
\3 WAY
R144
12K
U24B
6
7
5
RC4560
JP4
R306
220K
D44
GRN
.1
+15
D45
RED
THRESHOLD
B
A
JP2
12K
-24
2
3
R168
820
6
5
R45
470
JP3
3/4 WAY
\2 WAY
R96
470
JP5
615141312111019 8 7 6 5 4 3 2 1
BP29
.1
BP30
.1
P5.12
1
5
U19D
16
SW06
1
4
R146
470
615141312111019 8 7 6 5 4 3 2 1
5
6
CARD 3
LPF IN
SELECT
4
U36A
R167
1
LF353N
8
R169
15K
U36B
7
LF353N
R181
100
D30
+15
D3
1N4148
U21A
LF353N
R106
13K
D12
1N4148
U21B
LF353N
D25
1N4148
U35A
LF353N
C78
R40
4
8
1
7
R141
10K
4
8
1
10K
U2A
RC4560
1
R53
13K
R91
10K
U12B
7
RC4560
R107
U26A
1
RC4560
R153
2K0
R152
13K
C93
.1
R171
2K0
GAIN 4
R164
1M5
-15
C15
47pF
R54
2K0
50K TRIM
+15
R21
1M5
C2
.022 MY
D4
1N4148
C41
47pF
2K0
D.C. OFFSET
R74
1M5
.022 MY
D13
1N4148
C69
47pF
+15
D.C. OFFSET
R135
1M5
C65
.022 MY
D26
1N4148
R282
R172
10K
R286
10KB
R159
1K5
GAIN TRIM
1K0
D.C. OFFSET
GAIN TRIM
R102
50K TRIM
R103
C30
GAIN TRIM
R148
50K TRIM
R149
1K0
3K3
R277
150K
R276
100K TRIM
R49
1K0
R51
R50
130K
R279
R278
100K TRIM
1K0
R104
1K0
.47/35T
R281
130K
R280
100K TRIM
1K0
R150
6
5
3
2
1
3
2
4
R14
330K
R15
150K
D5
1N4148
3
2
1
14
15
13
D14
1N4148
C31
3
2
1
3
2
4
D27
1N4148
6
5
R178
1K5
C77
10pF
D31
1N4148
U35B
LF353N
C10
82 pF
R26
10K0
+15
8
R28
9K09
C8
R30
9K09
C5
.001
9K09
C36
.001
R83
9K09
2 1
3
U1A
2
1
3
RC4560
4
-15
C9
R31
82 pF
10K0
R-PACK
30K = 20Hz
C37
82 pF
R79
10K0
R81
U1B
6
7
5
RC4560
C84
82 pF
R84
10K0
7
3
1
4
+15
\3 WAY
2/4 WAY
U42B
5
3
6
8
9
U41B
4011
56124
4
+15
POWER TRANSFORMER
CONN-8M
4
4071
U42C
10
4071
R234
10K
8
9
MALE 8-PIN
TO/FROM TOROID
P3A
1
P3B
2
P3C
3
P3D
4
+15
1
-15
213
54
.22/50MP
C20
33K RES NET
.22/50MP
C45
16 1
15 2
14 3
13 4
12 5
11 6
10 7
9 8
U41A
2
1
+15
4011
+15
12
13
R235
10K
U41C
4011
P3H
P3G
P3F
P3E
U18E
SW06
.22/50MP
RN5
MONO
\STEREO
.22/50MP
RN6
33K RES NET
R229
10K
10
8
7
6
5
1
-15
C7
.1
4
U11A
2
1
3
C21
16 1
15 2
14 3
13 4
12 5
11 6
10 7
9 8
C46
RC4560
8
+15
U19A
2
1
3
SW06
U19C
1
1
9
1
SW06
0
U11B
6
7
5
RC4560
.22/50MP
C6
.1
.22/50MP
.22/50MP
C12
C11
.22/50MP
C39
C38
BP12
-15
C13
.1
47/63V
4
U4A
2
1
3
RC4560
8
BP11
.1
+15
R19
6K2
THRESHOLD
10KB
R10
-15
240
U4B
2
3
RC4560
R301
4
U8A
1
RC4560
8
+15
R402
100
7
BP23
.1
BP24
.1
6
5
R400
100
J2
R36
47K
INSERTION 1
47/63V
R37
47K
C14
-15
R39
10K
R38
2K0
2
3
R52
1K5
R290
10KB
GAIN 1
C103
1N4148
47/63V
R88
47K
4.7/50V NP
D2
R20
-15
1M5
-15
C40
R90
10K
R89
2K0
C4
10pF
R13
1K5
4
2
3
8
+15
6
5
R105
1K5
R289
10KB
R11
33K
J5
INSERTION 2
D1
1N4148
R12
33K
U2B
6
7
5
RC4560
R401
100
GAIN 2
R232
D34
\2 WAY
4
3
.1
DB104
C34
RED
MONO
+24
STEREO
RED
D35
R110
8K2
+24
4 WAY
D39
RED
R243
10K
+24
R241
1K0
R238
1K0
R237
10K
+24
1
C102
C101
.1
.1
BP14
.1
.1
1K8
Q15
U19E
SW06
2N4401
R231
R230
10K
D38
N/C
R233
10
1K8
Q14
2N4401
R245
1K0
R246
1K0
Q17
2N4401
3 WAY
R242
1K0
RED
Q18
2N4401
U41D
11
4011
R236
C86
.01
3/4 WAY
10K
D47
2
C100
-24
BP43
BP35
.1
.1
R248
100K
R240
10K
+15
213
54
-15
Q16
2N4401
-15+15
2 WAY
THM 6021
HEAT SINK
C91
1000/35V
1000/35V
C92
BP13
.1
R72
6K2
THRESHOLD
10KB
R65
240
R302
THRESHOLD
10KB
3
3
C35
.1
0 OHM
3.3/25T
3.3/25T
R109
-15
R66
33K
INSERTION 3
J8
-15
R129
33K
C88
C87
-15
-15
+15
2
3
U20B
6
7
5
RC4560
R244
10K
R239
1K0
D36
RED
R134
6K2
240
R128
R303
U26B
6
7
5
RC4560
PD =
3 WATTS
U39
78M15
1
OUT
IN
G
N
D
2
1
G
N
2
D
OUT
IN
U40
79M15
BP44
BP36
.1
.1
D10
1N4148
D11
R67
1N4148
33K
4
U20A
2
1
3
RC4560
8
+15
D23
1N4148
33KR130
4
U24A
2
3
RC4560
8
+15
+15
R108
0 OHM
C89
.01
C90
.01
R163
6K2
THRESHOLD
R156
240
.1
BP49
4
U34A
1
RC4560
8
BP50
.1
-15
C68
47/63V
R138
47K
4.7/50V NP
D24
1N4148
R187
1
1M5
-15
R300
10KB
R157
R73
1M5
-15
R139
2K0
GAIN 3
C104
-15
INSERTION 4
J9
33K
+15
C32
10pF
R68
1K5
6
5
C94
.1
R140
10K
R131
1K5
6
5
2
3
R151
1K5
R288
10KB
C67
10pF
4
2
3
8
+15
47/63V
R170
47K
D29
1N4148
1N4148
R158
33K
U34B
7
RC4560
GRN
2
3
BP34
3
2
-15
5
6
6
5
B
3
2
RC4560
HP-B OUT
2
3
C
R48
12K
-15
4
U12A
1
RC4560
8
+15
.1
-15
.1
8
U7A
RC4560
4
U7B
RC4560
U14B
RC4560
+15
+15
8
U17A
RC4560
4
U17B
7
SW06
6 7
U19B
8
4
U31A
8
+15
BP38
.1
8
U30A
1
RC4560
4
-15
6
5
R186
220K
+15
R44
12K
+15
3
2
+15
1
7
R101
12K
7
R95
12K
3
2
-15
5
1
6
-15
3 2
R155
12K
1
RC4560
R145
12K
3
2
5
6
BP40
R175
U32B
RC4560
.1
HP-A OUT
BP27
1
1
6
.1
12K
7
LIMIT 4
BP45
C19
47/63V
8
RC4560
4
BP10
.1
C50
47/63V
8
U16A
RC4560
4
.1
LP-B OUT
U18A
SW06
U18D
14 15
SW06
\2 WAY
C74
47/63V
8
U29A
RC4560
4
LP-C OUT
U6A
5
6
U16B
RC4560
3/4 WAY
U29B
RC4560
BP7
.1
1
U6B
7
RC4560
LP-A OUT
P4.16
.1
1
BP28
7
BP37
.1
1
-15
BP39
7
C23
33 pF
5
6
P4.1
-15
3
2
C48
33 pF
-15
C57
.1
33 pF
P5.21
5
6
-15
3
2
C64
33 pF
5
6
9 8
10 7
11 6
12 5
13 4
14 3
15 2
16 1
-15
4
3
2
8
+15
U15B
5532
4
U15A
8
5532
+15
5
6
5532
9 8
10 7
11 6
12 5
13 4
14 3
15 2
16 1
4
3
2
8
+15
U33B
5532
9 8
10 7
11 6
12 5
13 4
14 3
15 2
16 1
BP19
4
U33A
8
5532
+15
C1
33 pF
U5B
7
5532
RN1
4K7 RES NET
1
U5A
5532
BP5
.1
C25
33 pF
7
9 8
10 7
11 6
12 5
13 4
14 3
15 2
16 1
BP15
.1
1
BP16
.1
C51
33 pF
U25B
7
RN3
4K7 RES NET
BP17
.1
1
U25A
5532
BP18
.1
C58
33 pF
7
RN4
4K7 RES NET
.1
1
BP20
.1
BP6
.1
R60
100
RN2
4K7 RES NET
R6
100
R61
100
R123
100
R112
100
R113
100
R122
R5
100
MUTE
C302
.001
MUTE
C305
.001
MUTE
C307
.001
100
MUTE
+15
R214
C303
.001
C28
47/63V
+15
R213
C53
47/63V
C54
47/63V
+15
R211
47/63V
C61
47/63V
+15
R210
4211 24TH AVE W
SEATTLE WA
98199-1214
10K
C27
47/63V
10K
C304
.001
10K
C60
C306
.001
10K
R228
-15
C301
.001
C300
.001
R226
2
1K0
Q3
2N4401
-15
C26
47/63V
R264
10K
R265
10K
C29
47/63V
R224
2
1K0
Q5
2N4401
R208
-15
47/63V
C52
R268
10K
R269
10K
C55
47/63V
R212
2
1K0
Q7
2N4401
R223
-15
47/63V
C59
R272
10K
R273
10K
C62
47/63V
R209
2
1K0
Q9
2N4401
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