Carvin BX-500 Schematic
INPUT
H5A.A
H5A.B
J12
H5A.C
H5A.D
1K
R296
1M
R295
Q3
MUTE
R19
47K
C2
.01
P11
cw
B50K
C61
82pF
D.I.POS
D.I.POS
D.I.NEG
470
R115
mute
R313
D31
MUTE
2
-
A5.A
+1
3
H1a.A
H1a.B
H1a.D
AGND
+15VDC
R120
3.3K
3.3K
D6
GRAPHIC +
EQ
GRAPHIC -
+15VDC
POWER
-15VDC
NOTES: UNLESS OTHERWISE SPECIFIED.
4. ADDED AS SECONDARY OPERATION.
3. ALL OP AMPS ARE TYPE 4565, EXCEPT AS NOTED.
2. ALL CAPACITORS IN MICORFARADS, EXCEPT AS NOTED.
1. ALL RESISTORS IN OHMS
ARVIN
C
DRAWN BY:
APPROVED:
PCB
NO:
ASSY.
NO:
REVISED BY:
CHANGES TO REV(E):
1. ADD R823 = 68K smt.
2. ADD R889 = 560R smt (PREVENT SKIP MODE).
3. CONNECT R102, R96 TO "V BIAS" NET.
4. C826 FOOTPRINT CHANGED TO 1uF smt. (NOT 22u)
5. Z3 = 9v
6. ADD R177 = 470k (no sec).
+
R118
1.5K
R818
1.5K
C76
22µF
D4
+
22µF
blu
C77
BX500
System Master
ERIC PETERSEN
80-45500
MATT OTAVKA
3a.(CHANGE R104, R105 TO 220K)
H5B.A
H5B.B
input
H5B.C
a gnd
H5B.D
R20
22K
R4
4.7K
R15
1M
50Hz
P91
10K
1µF/100v
C81
C142
180pF
C6
0.022
R169
360K smt 1/4w
H1b.A
H1b.B
H1b.D
GND
R98
10K
2901
8
Ð
A22.D
+14
9
6
2901
Ð
A22.B
+1
7
4
2901
Ð
A22.A
+2
5
10
2901
Ð
A22.C
+13
11
22V FET
+
C107
C108
22µF
22µF
12340 World Trade Drive
San Diego, CA 92128
(858) 487-1600
FAX 487-6629
DATE:
08AUG2008
DATE:
REV:
F30-45500
REV:
E
DATE:
25FEB2010
AGND
-
A5.B
+7
R184
10K smt 1/4w
R6
2.2K
D.O.POS
D.O.NEG
R3
10K
R336
47K
GRAPHIC
S5.A
4.7½
+
4.7½
C1 thru
6
5
R218
P92
10K
+
S7.A
47K
R122
S5.B
R162
R164
REV D: ADDED R140, R235 in // for IRS2092 5V.
#689#690
#212 #268 #278 #91
Standoff holes
#991 #992
TUBE MTG
#993 #994
SMT SCREEN HOLES
#995 #996 #997 #998
DC PROTECTION
R92
OUT 1
OUT 1
100K
470µF 25V
DC SENS
n/u
R32
+
C15
R73
10K
C4
C122
0.033u
C148
0.47µF
C75
0.01
2N5400
Q14
0.1
thru
0.1u
+15VDC
470K
+15VDC
R150
1.5K
DC PROT
P93
10K
R171
S7.B
+24FRONT
PWRCOM
2N5400
Q11
R265
1M½
R236
365K
ACTIVE
125 Hz 250 Hz80Hz
C71
0.1uF
C7
0.01
R7
1.8K
360K
GEQ FSW
D19
red
C100
6
A14.B
5
OP2
R62
10K
R72
10K
R252
6.8K*
R254
10K*
R268
3.3K
BLU
1.8K
360K
-
A9.A
+
PROTECT
R110
10K
R195
10K
R183
10K
39pF
8
+15VAMP
+
4
-15VAMP
8
2
-
A14.A
+
3
4
-15VAMP
THERMAL DIODE
D18
C72
0.1
R172
7
+15VAMP
-15VAMP
R25
10K
-15VAMP
+
C123
1µF
Q19
R292
4.7K
+
22µF
C117
R293
3.3K
ACTIVE
S3.A S3.B
100K
P94
10K
-
A9.B
+
R9
C9
0.0068
MU FSW
MU FSW
GEQ FSW
+24FRONT
-15VDC
PROT F
+15VDC
RETURN
SEND
-15VDC
AMP1-
C128
0.01µF
D28
D33
1
R157
22K
R196
+15VAMP
THERMAL DIODE
D29
1N914
Q15
5550
R264
6.8K
R214
15K
R204
R230
10K
.047µF
C118
R290
C10
0.1
R10
1.8K
R175
360K
470K
R239
100K
6.8k
R197
+15VAMP
R191
47K
R193
1.8K
R188
0 jmp
TEMP SENS.
C138
cw
B50K
C137
1µF
R80
4.7K
TUBE
-15VAMP
R142
GND
C810
0.0033µF 400v
PWRCOM
68
D826
R867
R831
BASS
P6
.033µF
GND
Q102
H9B.A
H9B.B
H9B.C
H9B.D
H9B.E
H9B.F
H9B.G
H9B.H
33K
1.5K
C21
R44
100K
2.2K
R43
2.2K
1A 600V
cw
C23
560pF
C13
.01
PRI
BIAS
GEQ IN
15-86010
560pF
R47
10K
P3
B50K
2
-
A3.A
+ 1
3
6
Ð
A3.B
+ 7
5
sec
GRAPHIC +
MUTE
GRAPHIC -
4565
GND=on, neg=off
R136
47K
R132
1M
T GND
0.1µF / 100vC28
5
9
V1.C
4
FILAMENT
T1
+/-15VDC
PWRCOM
DSP
RECT AC
C97
0.047µF 400V
R35
15K
C84
330pF
2
3
F GND
22V FET
R266
R256
150K
22K*
+
C120
+
C124
1µF
68K
R267
4.7K*
R258
R257
22K*
R285
1µF
Q8
1K
+
C125
1µF
1M
R259
1K
P1
cw
DRIVE
B50K
R262
6.8K
500Hz
P96
10K
C82
0.068
R12
-
A8.BA11.B
+
R13
360K
H3A.A
MU FSW AMP
H3A.B
H3A.C
H3A.D
24VJFETS
H3A.E
H3A.F
H3A.G
H3A.H
H3A.I
C186
+
H3A.J
22
OUT 1
R223
H3B.A
H3B.B
H3B.C
H3B.D
H3B.E
H3B.F
H3B.I
H3B.J
R178
H3B.G
H3B.H
n/u
P95
10K
C12
0.0033
-
A8.A
+
R153
10K
n/u
-15VAMP
R177
470K
4565
3
R187
330pF
Q35
Q27
2N5400
10K
C73
C74
330pF
+
C109
-15VAMP
2 OHM SW-
R212
4.7K
Z11
Z22
9.1v
9.1v
7
C101
R158
+
1
A17.A
-
2
R192
150k
R217
220R
1.5K
2N5400
8
6
-
4565
A17.B
+
5
4
2.2K
FAN C
-15VAMP
+15VAMP
R68
R311
3.3K
47K
6
-
4565
A6.B
+ 7
5
C24
R312
0.1µF
D10
1.5K 100K
R67
220
R281
6.8K
R284
365K
C114
1µF
+
R283
150K
R294
C18
+
1u
Q18
R282
R291
10K
2.2K
+
22µF
C116
800Hz
P97
10K
C47
0.033
R23
2.2K2.2K
C46
-
A2.A
0.0022
+
R48
360K
LFL LFS
R127
GEQ FSW AMP
PROT APROT F
22K
-15VAMP
+15VAMP
RETURN AMP
SEND AMP
R189
R100
150k
470
D52
D53
BLU
BLU
LIMIT
D57
n/u
R194
D58
0 jmp
R185
10K
I-2
I+2
BA2
BD2
U2
3.3K
R216
R186
10K
R202
1µF
100K
+15VAMP
22
+
R208
4.7K
D310
C17
0.1µF
I-1
I+1
BA1
BD1
1
23456789
15K
R170
R200
100R
R199
GND
R168
6.8K
2 OHM SW-
-18V
R220
4.7K smt 1/4w
22
C96
Q33
5401
R228
n/u
R33
470
R26
B50K
cw
1.3kHz
C36
0.001
C16
180pF
6
-
4565
A7.B
+
5
GND
LIMIT
R206
D59
D55
D60
O1O2V-
100R
LFS
2 OHM SW
S1.A
+
Q13
350
R226
n/u
R76
1K
R340
33K
contour
P2
.047µF
C45
360K
R70
8
4
N/U
GND
V+
H1.B
H1.A
R5
+15VAMP
R75
68K
cw
C134
0.022
R11
R22
22K
+15VAMP
7
-15VAMP
C144
.047uF
+15VAMP
-15VAMP
2 OHM SW+
N/U
+15VAMP-15VAMP
10111213141516
BI2
BI1
LFL
S1.B
120R
1W
R224
n/u
Q9
5550
10K
.047uF
.047uF
+
- FAN
R341
C136
6
5
R346
15K
R342
550 Hz
-
A2.B
+
C80
C64
BO2BO1
+
33K
39pF
-
A13.B
+ 7
P98
10K
C140
.047uF
LM13700
D7
ON TIMER
C95
22
R343
2.5kHz
C57
560p
C31
330pF
2 OHM SW+
-FAN
R38
10K
10K
GND
10K
R129
R39
470
C135
.022µF
C58
0.01
R59
R60
360K
R71
10K
+3dB@30Hz
-3dB@30kHz
R86
150K
GND
R69
3.3K
4565
R77
22K
2
3
P99
10K
2
3
A13.A
R130
R103
R40
10K
C19
82pF
+ 1
5kHz
-
A1.A
+
1M
R222
47K
1µF / 63v
R210
12K
+15VAMP
8
-
A6.A
+
4
-15VAMP
LIM OP INV
560pF
-15VAMP
Q28
2.2K
0.22µF / 63v
C87
GND
PLATE V+
Z8
Z9
Q803
R837
1K
1
C20
22µF
R41
10K
R34
sec
47K
COMP SENS
R14
-
A11.A
+
C56
0.0068
R55
2.2K2.2K2.2K
C55
R56
150K
TUBE BP
TUBE
GND=on, neg=off
R114
10K
C106
.01
Q29
5401
BYP
R144
N/U
N/U
R128
47K
C86
330pF
8
6
+15VAMP
-
A16.B
7
+
5
4
-15VAMP
C67
R124
0 R
R123
150K
GND
GND
FILAMENT
RECT AC
30V
30V
600V 1A SMT
FSDH0265RN
5
Vstr
PWM
4
Ipk
Vfb
32
Z801
Z805
+
C830
0.047µF
R65
10K
10K
C83
180pF
R163
220K
R234
220K
Q808
1K
C88
SHUTDWN
R141
D814
Drain
GND
Vcc
PWRCOM
TREBLE
2.2K
-
A1.B
+
BYP
R116
10K
R182
47K
H9A.A
H9A.B
H9A.C
H9A.D
H9A.E
H9A.F
H9A.G
R233
220K
R165
220K
8
7
6
1
PWRCOM
9.1V
9.1V
.01µF
R79
10K
S2.A
R78
10K
H9A.H
R42
C22
R866
+
C94
22µF
R49
R50
10K
C48
2
-
LO MID HI MID
A26.A
+ 1
3
P16
B50K
cw
C54
0.1µF
R83
10K
R85
47k
R159
1M
P17.B
15C50Kx2
R51
4.7K
P17.A
15C50Kx2
R53
4.7K
Q4
D2
R84
4.7K
R328
47K
C51
.01
MUTE
Q5
D1
R316
47K
R81
47k
R160
1M
R121
10K
8
-
A7.A
+
4
R237
+15VAMP
1
-15VAMP
TUBE
R238
220K
R119
Z20
5.1v
Z21
5.1v
PROT A
220K
n/u
R74
4.7K
R29
100K
SHUTDWN
+
C147
22uF 35V
+
C150
22uF 35V
Q7
2N5400
R88
100
R260
1
0 jmp
V1.A
2
R240
3
n/u
R261
0 jmp
T GND
PL V+
+15VDC PRI
D823
++
C842
470
C843
470
-15VDC PRI
D824
R101
22½
1W
R45
4.7K
R93
6.8K
+15VDC PRI
A803.B
7
4565
-15VDC PRI
+15VDC PRI VREF
cw
R24
47K
PL V+
10K
180pF
cw
C25
+
22uF/50v
.047uF
CSD1
Q6
8
4
C50
.01
C85
R113
47K
R8
R854
33K
6
Ð
+
5
R105
100
R287
10K
P7
B50K
cw
C110
.022µF
R298
4.7K
R299
C49
4.7K
0.047µF
C26
C52
180pF
22µF
6.8K
R21
6
-
A10.B
+ 7
5
MASTER VOLUME
P10
B50K
cw
R1
C53
6.8K
82pF
2
-
A10.A
+ 1
3
C113
C111
0.001µF
0.001µF
R301kR31
2.2k
C34
0.001µF
+
C203
R201
Q10
100R
22uF 35V
5550
D8
1A
R140
1K
-15VAMP
V1.B
D818
4.7K
R46
10K
VOLTAGE DOUBLING BELOW 140VAC
Diode smt 600V 1A
PWRCOM
R815
220K
R816
220K
+15VDC PRI
C69
+
Q36
D820
PWRCOM
+
C93
1µF
L
E
N
PL2
GND
BR1
1µF 400V
R161
470K
R834
470K
R835
33K
PWRCOMPWRCOM
R107
R109
330
1K
10K
R297
C127
180pF
6
-
A26.B
+ 7
5
P26.B
15C50Kx2
cw
P26.A
15C50Kx2
cw
R415
33K R411
AMP1-
R131
100K
+15VAMP
R203
1K
R205
3.3K
R207
6.8K
QC7_SWswitch
QC6_SWswitch
F1
GND
QC5
TR1
T
D3
-15VDC PRI
Q16
+
C90
Z2
1µF
5.1V
+
C822
1µF
PWRCOM
R151
10K
C91
R54
180pF
2
-
A29.A
4.7K
+ 1
3
R52
10K
C126
.01µF
D43
12V BIAS +
C27
47µF 63V
V-
MU FSW AMP
GEQ FSW AMP
R133
2.2K
R90
2.2K
R215
C14
10R
180PF 500V
U5
1
16
CSH
VAA
2
15
VB
GND
3
14
HO
IN-
4
COMP
5
CSD
6
VSS
7
VREF
89
OCSET
C133
X2 .47
VCC
IRS2092
COM
DT
VS
LO
.1uF 100v
13
12
11
10
R209
L4
34
2
1
E4
E1
E11
RECT AC
+15VDC PRI
Q26
R134
10K
R819
B7
+
10K
A801.B
+
K1
C146
1000uF 200V
+
C151
1000uF 200V
R135
47K
R143
C89
1K
0.001uF
C79
C823
Q34
22µF
180pF
+15VDC PRI
R96
R97
3.3K
220K
6
Ð
+7
5
R102
47K
R99
10K
PWRCOM
SEND
R82
10K
C92
180pF
6
-
A29.B
+7
5
R167
N/U
R166
N/U
R152
22
+
R213
4.7R
D5
Diode smt 600V 1A
+
C207a
R211
8.2K
3.3K
.1uF 100v
X2 .47
C42
.0022 Y .0022 Y
GND
R112
47K 1W
PRI MID
R126
47K 1W
+15VDC PRI
R829 6.8K
R805 1.5K
1
2
3
4
PWRCOM
+
C68
Q801
1uF
PWRCOM
VCC
R219
47K
VC HI
C207
22uF 50V
VC LO
+
C209a
LINE FILTER
34
1
C44C60
RECT AC
Q800GATE
Q802GATE
PWRCOM
+
C802
.01
PWRCOM
D32
VCCVSVB
IRS2153
RT
CT
COM
U3
DC PROT
62-00014
+
N/U
R850
C35
C209
22uF 50V
L6
HO
LO
1K
RETURN
R58
10K
R57
4.7K
Q21
7812
R18010K
R18110K
R27
10K
R225
3.3K
2
D822
R817
10½
8
7
6
5
D54
PWRCOM
V OutV IN
R806
10½
D821
R810
10½
1uF 50V
PWRCOM
4
Ð
A12.A
+
5
COMP SENS
C40
Diode smt 600V 1A
R221
10K
HEAT SINK
E21
E22
E23
C103
X2 .047
R845
470K
10K
R807
10K
D15
R851
100
D42
100
RECT AC
R823
470K
R824
470K
R825
10K
10
Ð
A12.C
+
11
6
Ð
A12.B
+ 1
7
R16
100K
VCC
+
J9.A
GND
D205
VC HI
Q22
NPN 25000
zetex
R227
10R
Q23
PNP 25000
zetex
VC LO
Q24
R229
NPN 25000
zetex
10R
Q25
PNP 25000
zetex
E24
E25
E26
R844
470K
C818
250pF
Q800
R812A
R812B
R808
22½
22½
1W
1W
Q802
R828B
R828A
22½
22½
1W
1W
C820
250pF
Q811
R855
Q800GATE
N/U
Q812
Q809
R852R826
N/U
Q802GATE
Q810
PWRCOM
UNDER/OVER VOLTAGE SHUT DOWN
VREF
R822
18K
2
3
+
R809
C808
33K
0.1
2
PWRCOM
3
+
C806
R821
0.1
47K
PWRCOM
8
Ð
A12.D
+
9
D.O.POS
D.O.NEG
FOOT SW
65-70vdc
Ð
A803.A
+ 1
+15VDC PRI
8
Ð
A801.A
+
4
-15VDC PRI
10K
-15VDC
COMP SENS
R63
10K
R174
C78
2
-
A16.A
+
3
CH1 FET
L1
V+
1A
D105
1A
D104
V-
R17
R18
C520
22uF 50V
Z13
9.1v
Z12
5.1v
+20V
-20V
HI SEC
A802.B
+
C39
.001uF
+
C32
330pF
8
+15VAMP
-15VAMP
4
C33
R179
1000µF 25V
1000µF 25V
1A 600V
Q12
2N5400
Q131
2N5400
47K
0.1µF smt 250V
22uF
R843
100K
R802
10K
1µF
1
C11
1K
R125
C98
6
Ð
+7
.01uF
1K
R108
R91
100K
2
A15.A
3
+15VAMP
-15VAMP
1uF 160V
+
22uF 50v
2.2K
5
C804
0.1µF
C38
R231
10K
+
D20
D21
D48
D51
D50
D49
D34
D25
D40
D36
470
R89
+15VDC
R36
1K
C63
180pF
R64
10K
8
+15VAMP
1
-15VAMP
4
R2
1K
RETURN AMP
C30
0.1µF 275VAC
R138
R139
22ohm 1W
+
C3
R154
n/u
10K
R232
1000µF 25V
+
C119
+
C129
8A
+20V
-20V
D26
D27
D38
D39
PWRCOM
R847
47K
R839
27K
R840
10K
R830
+
D800
PWRCOM
100
1A
1K
-15VDC
R28
D11
1
BA1
R61
2
BD1
15K
3
I+1
I-1
4
O1
5
V-
6
100R
100R
R87
BI1
7
R66
89
-15VDC
LIM OP INV
C406
R406
+
150
22µF/50v
100K
C404
R409
+
150
22µF/50v
R410
100K
R455
Q1
100
5550
R456
100
Q2
5401
SEND AMP
C410
R339
+
470
22µF
C401
+
22µF
OUT 1
J2
2-1+1-
R106
22ohm 1W
R149
R501
1K
Z500
5.1v
R250
10ohm 1W
R255
10ohm 1W
Q32
TIP31C
R24168R
R24268R
R24368R
R24468R
R24568R
R24668R
+
C161
1000uF 100V
C162
+
1000uF 100V
C130
C132
.0022 Y
VREF
R842
1K
OVER TEMP/AUX PROTECTION
Q807
PWRCOM
2.2K smt 1/8w
2.2K smt 1/8w
Z501 Z502
9.1v
10ohm 1W
+
C102
+18V
-18V
V+
+
1000µF 25V
+
1000µF 25V
C62
C834
0.1µF
C37
+
120pF
9.1v
R251
R253
10ohm 1W
V-
D37
D44
GND
ISENSE+
2+
GND GND
+15V
Q20
7815
7915
Q17
-15V
C104
+
470µF 50V
20REG
-FAN
U4
LM13700
R451
100
R452
R453
100
R454
Q500
5550
.047
.047
C139
+40V
J10
2
GND
J5.B
J5.A
C521
22uF
FILAMENT
TO H9
C112
C115
+
1000uF 100V
16
BA2
15
BD2
14
I+2
I-2
13
O2
12
V+
+15VDC
11
BI2
10
BO2BO1
PRE AMP D.I. OUT
1
3
100½
.001µF
R405
S11.A
GND LIFT
TUNER/phones
J6.A
J4.A EFF SEND
EFF RTN
GND
J1
2-1+1-
2+
24VJFETS
+
C522
0.1
+15VAMP
+
C143
1µF
GND
+
C145
1µF
-15VAMP
PLATE V+
R247
3.3K
+
R248
C8
22µF 160V
3.3K
R249
3.3K
C403
GND
GND
R147
R95
R190
470K
47K
C41
R137
27pF
2
Ð
10K
A4.A
1
R198
10K
+
B50K
3
P12
6
-
A4.B
+ 7
5
R111
100K
C170
C59
0.1uF
27pF
COMPRESSOR
C405
180pF
R408
R407
10K
R176
SEND AMP
2
D
S
1
2
D
S
1
V-
10K
8
+15VAMP
6
-
A15.B
7
+
5
-15VAMP
4
C99
10K
82pF
R173
22K
65-70vdc
V+
C215
C217
0.1u / 400VDC
0.1u /400VDC
28µH / 9A
4.7K smt 1/4w
+40V
C5
+
22µF
4.7K
R146
R145
G
10R
3
R155
Q30
10K
IRFB4227D
R148
G
10R
R156
3
10K
Q31
IRFB4227D
4.7K smt 1/4w
20REG
Q CENTER
ISENSE+
#1157
PWRCOM
U1
PRI
N/U
LOW SEC
SHLD
CENTER
BIAS
+
+
C29
1uF 63V
C836
22µF
PWRCOM
Q CENTER
C805
+
.22uF 630V
12V BIAS +
V-
#1156
#1155
D825
+15VDC PRI
1
D827
4565
D828
4565
-15VDC PRI
1
A802.A
R853
10K
8
Ð
4
C70
2
+
3
+
.1u
D815
VREF
R820
R104
100K
10K
OVER CURRENT DETECTION
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