Carvin BX-1200, BX-600 Schematic
INPUT
J12
input
a gnd
H5B.A
H5B.B
H5B.C
H5B.D
AGND
H5A.A
H5A.B
H5A.C
H5A.D
1K
R296
1M
R295
R18
0.22µF/63v
n/u
Q13
N:256
100K
R288
R34
pot body grounding
R36
100
MUTE
R32
47K
R33
1M
10K
C12
.01
AGND A GND
R184
+
+
2
3
C83
C85
Ð
A5.A
+ 1
1µF
1µF
R62
1.8K
E1
10K
C37
.1µF
+
+
+
C35
.22µF
R64
1.8K
2
C36
.01µF
3
R65
360K
6
Ð
A5.B
+ 7
5
R63
360K
12340 World Trade Drive
San Diego, CA 92128
(858) 487-1600
FAX 487-6629
DATE:
30MAY05
DATE:
REV:
E
REV:
B
B
DATE:
11AUG06
BR1
++
D501
SMB
D502
SMB
D503
SMB
D504
SMB
D505
SMB
D506
SMB
C80
330pF
10K
R183
6
P16P15P14P13
Ð
A24.B
+ 7
5
R66
1.8K
6
C38
Ð
A6.A
+ 1
Ð
.0033µF
A6.B
+ 7
.0068µF
5
R67
360K
C41
.033µF
C42
.0022µF
Changes from Assembly Rev (B).
1. Fan high speed circuit correction.
2. correct shorted jumpers
Changes from Assembly Rev (C) not made.
1. Add resistors for P5 &P8 on BR600
2. correct bias circuit on amp 2
Changes from Assembly Rev (D).
1. Change C18 to through hle 0.47UF.
2. added diode on JFET rail to remove turn off pop.
3. added feedback cap to A10A.
4. added cap coupling to EQ switching circuit and
parameteric mids. Also resistor to bleed C52.
DI out
.001µF
C603
R605
C501
10KµF
80V
+
C502B
C502
10KµF
10KµF
63V
80V
VR1
++
7815
C503
2200
35V
C504
2200
35V
7915
+
C507
220
50V
SMT SCREEN HOLES
VR2
D8
SMB
C520
#689#690
C81
330pF
10K 10K 10K 10K
50 80 125 250 500 1.3k 2.6k 5k800
+
1µF
C31
+
C34
.01µF
R60
+
2.2K
C32
.022µF
R61
360K
4. ADDED AS SECONDARY OPERATION.
2. ALL CAPACITORS IN MICORFARADS, EXCEPT AS NOTED.
1. ALL RESISTORS IN OHMS
NOTES: UNLESS OTHERWISE SPECIFIED.
ARVIN
C
BX600, BX1200
System Master
DRAWN BY:
GEORGE DREYER
APPROVED:
PCB
30-42500
NO:
ASSY.
80-42800
NO:
80-42122
REVISED BY:
GEORGE DREYER
H7.C
RED
H7.A
YEL
H7.B
YEL
H7.D
GRN
H7.E
GRN
H7.F
GRN
H7.G
YEL
H7.H
YEL
H7.I
RED
+
+
C122
1
100½
C39
C40
360K
R162
4.7½
C138
R341
82pF
R340
100K
C134
.047µF
COMP SENS
C10
15K
Ð
A10.A
+ 1
R316
47K
MUTE
C136
R344 n/u
R346
15K
R342
10K
R343
10K
6
A13.B
5
550 Hz
100K
39pF
Ð
+ 7
R345
+
thru
25V FET
R275
2.2K*
Q16
+
C113
R260
15K*
1µF
R274
10K
R221
470K*
C115
R280
R265
R252
1M½
6.8K*
R236
R254
365K
n/u
1M
R218
10K*
thru
C111
+
C123
1µF
Q19
R292
10K
+
22µF
R293
C117
6.8K
22K*
39pF*
C109
R290 470K
C30
R185
330pF
10K
P17
P18
10K
10K
R68
.068µF
2.2K
2
Ð
A7.A
+ 1
3
R69
.022µF
.001µF
R70
2.2K
6
Ð
A7.B
+ 7
5
R71
360K
10K
C43
R72
2.2K
C44
R73
360K
P19
560pF
.01µF
C46
10K
C45
2
3
Ð
A8.A
+ 1
P21P20
10K
C47
R76
.0068µF
2.2K
C48
560pF
R74
2.2K
R75
360K
CLIP1
6
5
Ð
A8.B
+ 7
R309
R77
150K
47K
C49
330pF
R78
10K
6
A9.B
5
ACTIVE
Ð
+ 7
47K
R264
15K*
.022µF
C118
2
3
R267
4.7K*
Ð
A9.A
+ 1
Q9
5550
R2
S3.AS3.B
R100
2.2K
365K
C124
1µF
D103
R266
R258
150K
22µF
Red
+
blue
C9
Clip 1
R257
22K*
GRAPHIC
D203
LED CLIP 1
D18
Red
R262
R268
R259
P1
B100K
6.8K
3.3K
R79
6.8K
Clip 2
R256
22K*
+
C120
1µF
Q8
C125
1K
2
3
GRAPHIC +
R101
2.2K
+
cw0.22µF/63v
+15VDC
R82
10K
Ð
A24.A
+ 1
+15VDC
5550
R284
365K
1K
C114
1µF
R285
+
R282
n/u
R283
10K
150K
1µF
C112
DRIVE
1M
R294
+15VDC
R118
POWER
-15VDC
R83
Q4
6.8K
R84
4.7K
R85
47K
C51
.01
R159
1M
Q5
R80
4.7K
R81
47K
GRAPHIC -
R160
R308
Q10
47K
47K
R102
25V FET
R281
6.8K
C7
.22µF
470
R291
R26
contour
P2
B50K
cw
1K
+
22µF
C116
+
C76
22µF
Q18
4.7K
D4
C77
+
22µF
R31
15K
D32
R328
47K
82pF
R21
MUTE
C52
2
22µF
3
D33
C50
.01
1M
CLIP2
R138
CHANGES FOR BX1200 ASSEMBLY: 80-42122
1. Add Q110, Q210 (Type: MJL 21194).
2. Add Q114, Q214 ( Type: MJL 21193).
3. Add R168-R175, R268-R275 (0.22½).
4. Change C501, C502 to 10KmF @ 80V.
BX600 Assembly jumpers
B401, B402, B403, B404
B405, B406, B407, B408
B409
BX1200 Assembly jumpers
B801
H3A.F
H3A.E
R205
H3A.J
DI IN
DI OUT
GND LIFT
+15VAMP
GND
-15VAMP
H3A.D
H3A.C
H3A.G
C5
.1µF
H3A.H
H1B.1
H1B.2
H1B.3
H1B.4
H2B.1
H2B.2
H2B.3
H2B.4
H3A.A
H3A.B
R207
H3A.I
J9
100K
R602
R609
150½
R606
150½
C608
C607
22µF
22µF
H13B.A
H13B.B
H13B.C
H13B.D
input
a gnd
H13A.A
H13A.B
H13A.C
H13A.D
S8.A
2
3
R610
100K
AGND
+15Vdc
+25VDC
aGnd
-15VDC
S8.B
H1A.1
H1A.2
H1A.3
H1A.4
H2A.1
+
C1
.1µ
+
C2
.1µ
Q500
MMBT5550 NPN
1K
R501
1000µF 35V
9.1v5.1v
+
Z501 Z502
C69
1000µF/25V
Z500
5.1v
H2A.2
H2A.3
H2A.4
H4A.A
H4A.B
H4A.C
H4A.D
C521
C522
+
.1
1000µF/25V
10K
R130
10K
+
R230
10KK
10K
+15VAMP
-15VAMP
2
3
4.7K
-15VAMP
R206
ACROSS A4
V+
V-
FAN GND
-24V
2
3
4.7K
R208
R131
4.7K
C175
27pF
+15VAMP
8
Ð
A17.A
+
4
27pF
C93
R189
150k
R231
4.7K
C275
27pF
+15VAMP
8
Ð
A18.A
+
4
-15VAMP
27pF
C94
2043
R4
1K
2043
47K
C176
39pF
+15VAMP
4.7K
1
C18622+
R133
5
+
7
A17.B
2.2K
Ð
6
C177
R134
82pF
4.7K
+
C64
22µF
+
C70
22µF
R238
47K
C276
R137
1K
D106
1N914
D107
1N914
R141
4.7K
-15VAMP
R140
470½
+15VAMP
39pF
R239
4.7K
R240
470½
C82
R233
22
R289
150K
5
R237
+
7
A18.B
2.2K
Ð
1K
6
C277
D206
1N914
82pF
R234
4.7K
R97
1K
D207
1N914
R241
4.7K
-15VAMP
+
1
R144
1K
R244
R146
R222
R223
150
150
R148
560½
cw
R23
1K
R22
R147
680½
R149
150
R246
150
680
R25
R24
R247
680½
R248
R249
150
Q105
MJD340
R224
150
150
680
1K
560½
Q104
MJD350
TIP31
R216
Q204
MJD350
Q205
MJD340
R219
150
150
Q21
5550
Q106
R225
150
R217
150
Q22
TIP31
5550
R142
1K
Q102
340
R143
1K
P101
500½
Q103
350
R145
1K
R242
1K
Q202
340
R243
1K
P201
500½
1K
Q203
350
R245
1K
C65
R220
150
1
Q206
C135
.022µF
R1
560P
C180
.047
560P
560P
.047
0
R108
22K
10K
C182
Q107
R150
22½
1W
R151
22½
1W
c184
C280
R250
R251
560P
R39
1K
R40
47K
R38
47K
2
Ð
A13.A
+ 1
3
cw
B50K
P12
C66
120pF
6
Ð
A4.B
+ 7
5
C132
+
CLIP1
C133
+
CLIP2
MASTER VOLUME
B50K
cw
P10
C53
39pF
6
Ð
A10.B
+ 7
5
MJE15032
MONO NPN DRIVE
Q108
R1108
.22½
5W
R1112
.22½
5W
Q112
Q111
MJE15033
MONO PNP DRIVE
C282
Q207
B405
MJE15032
22½
1W
22½
1W
B406
Q211
C284
MJE15033
V-
OP1.B
C20
22µF
C19
39pF
R41
47K
COMP SENS
N:256
R111
33K
r195
10K
R306
100K
.1
R307
100K
.1
D.I.PRE
LED CLIP 1
B404
B400 CLIP
R8
3.3K
S1.B
B403
B400 MST
BI-AMP
MJL21194
Q109
Q110
R1109
R1110
.22½
.22½
5W
5W
R1113
R1114
.22½
.22½
5W
5W
Q113
Q114
MJL21193
H8.1
H8.2
MJL21194
MONO NPN DRIVE
Q208 Q209 Q210
R2208
R2209
.22½
.22½
5W
5W
R2212
R2213
.22½
.22½
5W
5W
Q212
Q213 Q214
MJL21193
MONO PNP DRIVE
TREBLE
10K
R35
10K
R95
150K
2
Ð
A4.A
+ 1
3
B400 DI PRE
S1.A
H9.1
H9.2
Q116
N/U
R1116
.22½
5W
R1115
.22½
5W
Q115
N/U
THERMAL DIODE
N/U
R2210
.22½
5W
R2214
.22½
5W
N/U
Q216
R2216
R2215
Q215
R42
.0033µF
S10.A
N/U
V+
.22½
5W
.22½
5W
cw
cw
C137
1µF
C22
C15
+15VDC
X-OVER
D1
N/U
D208B
N/U
N/U
BASS
cw
P6
B50K
C23
82pF
R43
10K
C21
.022µF
R44
100K
+
1µF
R3
100
S10.B
C54
.033µF
R9
150K
V+
D108B
Diode SMB SMT1A
R177
6.8K
R176
33K
D109B
SMT
V-
SMB
SMB
cw
P3
B50K
6
5
R30
47K
C6
6
39pF
Ð
A28.B
+ 7
5
D22 D23
CROSSOVER
.033µF
cw
P9.A
15C50Kx2
B401
Q117
5401
R178
100K
D7
R277
6.8K
R276
33K
D209B
OUTPUT1
R47
47K
2
Ð
A3.A
+ 1
3
Ð
A3.B
+ 7
OP1.A
R198
B400 DI
FREQ
R87
100K
B402
C55
P9.B
B801
R179
C181
.01
+15VAMP
D10
1N914
R278
100K
C8
22µF
D.I.PRE
+
22u
C131
1k
R304
COMPRESSOR
C57
R86
47K
2
Ð
A14.A
+ 1
3
cw
15C50Kx2
OUTPUT1
CURLIM
100K
R329
3.3K
1N914
47K smt 1/4w
OUTPUT2
Q217
5401
C281
.01
R232
150K smt 1/4w
22uF
C106
R305
100
C56
.001µF
R89
4.7K
R88
4.7K
C25
.1µF
100K
+15VDC
M LED
120pF
B407
R311
R312
1.8k
R210
100
R314
R315
1.8K
R211
100
R279
100K
+
R48
10K
LOW MID
P4
B50K
cw
R50
4.7k
R51
4.7k
D24D30
R313
B408
+15VAMP
47K
+15VAMP
220K
R228
1K
D11
3.3K
D31
120pF
OUTPUT2
8
2
Ð
A21.A
+
3
4
D25D26
1N914x4
C24
15C50Kx2
15C50Kx2
mute
R90
47K
R92
47K
C58
6
5
CURLIM
+15VAMP
-15VAMP
10K
R49
39pF
2
Ð
A28.A
+ 1
3
P23.B
cw
P23.A
cw
R117
R120
3.3K
D6
Q302
R325
1K
5550
Ð
A20.B
+ 7
1
D311
Diode 1N914 SMT
CURLIM
D27D28
150K smt 1/4w
+
Q15
5550
C110
.022µF
.047µF
EFF +
+15VDC
G LED
EQ
C59
6
5
R93
100K
R319
33K
R229
22uF
C105
C26
5401
Q17
R91
47K
Ð
A14.B
+ 7
R330
D310
R226
47
R331
100K
R287
10K
MID
120pF
68K
+
R317
22K
P7
B50K
R298
4.7k
r299
4.7k
-15VDC
10K
R310
EFF -
LOW
R11
4.7K
+15VAMP
D17
C318
22
D111
1N914
5550
OUTPUT2
220K
R227
R297
C127
6
Ð
A26.B
+ 7
5
cw
P26.B
15C50Kx2
P26.A
15C50Kx2
R7
10K
MUTE
GRAPHIC +
GRAPHIC -
DI IN
DI OUT
HI
3.3K
R327
22K
Q6
1K
R318
-24V
D29
1N914
10K
39pF
C128
.0047µF
cw
cw
C126
.01µF
R104
10K
Ð
A22.A
+2
Ð
A22.B
+1
Ð
A22.D
+14
Ð
A22.C
+13
amp2
R10
B50K
33K
R96
33K
R99
33K
amp1
R115
33K
R186
5½ 5W Vert.
.1µF
C121R139
.1µF
R209
8
2
+15VAMP
Ð
A20.A
1
+
-15VAMP
3
4
C313
22
R320
10K
C317
.0047µ
MJD340
Q301
1W
R332
22½
1W
-15VAMP
10K
R59
Q14
2N5400
THERMAL DIODE
HI MID
10K
R98
4
5
6
7
8
9
10
11
R6
47K
C67
2
3
C72
6
5
C62
FAN GND
+
R321
5.6K
7912 -12V
R335
22½
-24V
R300
10K
P27
B50K
cw
R302
4.7k
R303
4.7k
Ð
A25.A
+ 1
Ð
A25.B
+ 7
+
+
R324
10K
Q7
R333
P28.B
15C50Kx2
P28.A
15C50Kx2
+15VDC
47K
R121
P5
120pF
R13
P8
47K
B50K
120pF
-24V
D16
2N5400
FAN GND
+15VAMP
R323
27K
6
Ð
A21.B
+ 7
5
R322
470K
R334
22½
22½
1W
R286
5½ 5W Vert.
+
C63
.1µF
CLIP1
C310
1W
K200
R301
C130
2
3
CLIP2
D.I.PRE
Q303
n/u
FAN GND
+
10K
39pF
Ð
A26.A
+ 1
cw
cw
S7.A
K100
RELAY+
C129
.0033µF
S4.A
R336
R122
47K
H11A.E
H11A.C
H11A.D
H11A.F
H11A.B
H11A.A
H6A.A
H6A.B
RELAY+
D312
1N914
H12.1
H12.B
FAN GND
FAN GND
H6A.D
H6A.C
C221
.1µF
FAN GND
25V FET
+
+
+
C107
S7.B
47K
C27
22µF
C108
R14
22µF
+15VDC
C104
22µF
22µF
AGND
R54
100½
Q3 Q2
R157
1M
R28
100K
.01
+15VDC
Q11
GRAPHIC
C29C28
R52
10K
R53 R57
4.7K 4.7K
R55
47K
EFF +
S4.B
M LED
100K
Q12
S5.A
R116
2.2K
CLIP 1
CLIP 2
PRE AMP
DIRECT LINE
H11B.B
AMP2 TOP
H11B.A
H11B.F
H11B.D
R414
10K
R415
33K
AMP1 TOP
D.I. POST
QC1B
H11B.C
CLIP 2
H11B.E
CLIP 1
CLIP 2
CLIP 1
+15VDC
-15VDC
AMP1+
AMP2 +
N/C
agnd
AMP1-
AMP2 -
C79
H3B.I
H3B.J
H3B.C
H3B.D
+15REAR
H3B.G
-15REAR
H3B.H
H3B.E
R166
H3B.F
100½ smt 1/4w
R167
H3B.A
100½ smt 1/4w
H3B.B
QC1A
R136
H6B.A
H6B.B
H6B.D
H6B.C
H10.D
QC3
H10.A
F1
H10.B
AC Line in from switch
H10.C
AC Line to transformer
.01
S5.B
S2.A
S2.B
B50K
C74
R173
10K
n/u
-15REAR
22½ 1W1%
R419
22½ 1W1%
R182
22½ 1W1%
R420
22½ 1W1%
L200
1.5µH
E2
SPKR GND
4.7½
EFF
R15
P11
n/u
L100
1.5µH
D5
cw
R168
R158
10K
R164
1M
100K
R180
10K
C88
R425
+15REAR
3.3K
R119
10K
R174
R417
10K
C78
R1062.2K
R5 2.2K
6
5
R407
10K
C73
10K
2
Ð
A16.A
+
3
330pF
6
Ð
A16.B
+ 7
5
BRIDGE
27pF
R422
Ð
A23.B
+7
27pFC84
A23.A
1
PL1
N
E
L
C14
.047
250VAC
+15VDC
-15VDC
R58
10K
R56
47K
G LED
Q20
Ð
A15.B
+ 7
R170
8
4
10K
S9.A
6
5
10K
8
2
Ð
+
3
4
+15REAR
EFF -
2
3
330pF
+15REAR
1
-15REAR
R421
2+
H4B.A
H4B.B
H4B.C
H4B.D
H11A.H
H11A.G RETURN
H99.A
H99.D
H99.C
H99.B
C404
22µF
C405
39pF
R408
10K
8
+15REAR
Ð
A15.A
1
+
-15REAR
4
22µF
C410
C408
22µF
C407
22µF
10K
mono phone B400
R424
10K
J6
J7
2-1+1-
J8
R16
220K
470K smt 1/4w
R17
220µF 50V
+15VDC
R19
10k
GND
-15VDC
H11B.H
SEND
H11B.G
H99B.A
H99B.D
H99B.C
H99B.B
PRE AMP
J10
2
R406
150½
470½
2-1+1-
2-1+1-
+
R418
470½
R413
C11
3
R402
100K
C406
R409
150½
22µF
R410
100K
AMP1 INSERT
AMP2 INSERT
27pF
C3
10K
R124
R123
8
2
+15REAR
10K
Ð
A12.A
1
+
3
-15REAR
4
B409
27pF
C4
R125 R128
R126
10K 10K
6
Ð
A12.B
+ 7
5
B400 Spk
2+
SPKR GND
2+
Q1
+15REAR
-15REAR
500 ms delay
R20
R339
470
C401
22µF
GEQ/MUTE
1
J1
J2
22µF
SPKR GND
R12
R338
470
S12.A
R127
100½
100½
J11
C13
K1
TUNER
10k
EFF SEND
S12.B
C403
.001µF
R405
100½
S6.A
S6.B
C409
B400 Spk
.047
250VAC
J14
SPKR GND
J4
EFF RETURN
J5
S11.B
S11.A
FX/MUTE
SPKR GND
GND LIFT
-15REAR
R337
BRIDGE
S9.B
phones
J3
SPKR GND
J15
SPKR GND
1K
D34
EQ FSW
R29
EQ
D3
3.3K
+15REAR
3.3K
R27
FOOT SW
+15REAR
D2
EFF FSW
J13
SPKR GND
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