VOX Amplification AC30S1 User manual

GUITAR AMPLIFIER
AC30S1
SERVICE MANUAL
TABLE OF CONTENTS
Assembly (Exploded) view: 2
Block Diagram: 3
Schematic Diagram: 4
PCB ASSEMBLY: 9
Test Mode: 14
Parts List: 16
Issued: Nov. 12, 2018
Ver. 1.0
©2018 VOX AMPLIFICATION LTD.

1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
2
VOX Amplification ltd.
1 Harrison Close
Knowlhill
Milton Keynes
Bucks, MK5 8PA 4
X-16709 AC30S1 FX S/R
VD-A30032
ISS4-1
15-Aug-18
Title
Drawing Number: Date:
Revision: Sheet
of
Designed By: Checked By:
P Scarffe D Clarcke
Issue ChangeDate Signed
CHANGE HISTORY
C61
10nF 50V
C62 10nF 50V
R60
Ferrite
R58
Ferrite
R78 1K
R73
47R
R66
Link R79
68K
R70
100K
R80
link
R69
100K
FX SEND
FX RETURN
BPJ-BBB-MONO
J3
BPJ-BBB-MONO
J4
C65
NF
C64
470pF 50V
C77
470pF 50V
C76
22pF 50V
C53
10nF 50V GND_FX
+15Va
-15Va
2
31
A
U1A
TL072CDR
5
67
B
U1B TL072CDR
R76
1K8
D4
15V
D3
15V
C69
NF
R71
1K
R59
100K
C74
10nF 50V
C75
10nF 50V
R85
22K
R83
47K
+15Va
-15Va
R84
10K
R82
link
R67
link
P3
Header 3 - Wide
GND_FX
GND_FX
GND_FX
GND_FX
GND_FX
C59
10uF 35V
+5Va
P6
Header 3 - Wide
+15Va
-15Va +5Va
1
2
3
P5
Header 3 - Wide
To Digital Reverb
Use Pin 2 to screen 1 and 3
Use Pin 2 to screen 1 and 3
R64
470k
R65
220K
C56
10uF 35V
GND_FX
2
31
AU2A
TL072CDR
5
67
B
U2B
TL072CDR
C73
10uF 35V
R74
5K1
C66
NF
R81
NF
1
2
3
P11
Header 3 - Wide
GND_FX
Chassis_FX
SCREENED
WIRE
L1
FB
L4
FB
L2
FB
L3
FB
GND_FX
Use Pin 2 to screen 3 and 4
SCREENED
WIRE
To Main PCB P8
1
2
3
4
5
6
P4
!
!
3
4
4-1
29/05/18
11/07/18
23/07/18 Remove D8 and D11
Change R98 from 2.2Meg to 100K
Add C36
PS
PS
PS

1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
3
VOX Amplification ltd.
1 Harrison Close
Knowlhill
Milton Keynes
Bucks, MK5 8PA 4
X-16709 AC30S1 Reverb
VD-A30033
ISS4-1
15-Aug-18
Title
Drawing Number: Date:
Revision: Sheet
of
Designed By: Checked By:
P Scarffe D Clarke
Issue ChangeDate Signed
CHANGE HISTORY
VDVA
SW_CLK
SW_DIO
R1
1
DGND
DGND
AGND
MIDI_RXD
MIDI_TXD
RESET
SDTI
SDTO
MCLK
BCLK
LRCK
DGND
IN_AD_L
OUT_DA_L
VA
R6
0
AGND
R27 100R
16V
C1
100uF
X1
NM(12M)
C48
NM(22p)
DGND
VD
RESET
DGND
R2
100k R4 4.7k
for Debug
DGND
SW_DIO
SW_CLK
MIDI_RXD
MIDI_TXD
C47
NM(22p)
25V
C23 4.7uF
25V
C34
4.7uF
VCC
1
P50/AN22
2
P51/AN23
3
P52/AN24
4
P39
5
P3A
6
P3B
7
P3C
8
P3D
9
P3E
10
P3F
11
VSS
12 P10 25
P11/AN01 26
P12/AN02 27
AVSS 28
P14/AN04 29
P15/AN05 30
AVCC 31
AVRH 32
AVRL 33
P23/AN12 34
P22/AN13 35
P21/AN14 36
IC2
MB9BF124KPMC
C15
0.1uF
C16
0.1uF
C35
0.1uF
C6
0.1uF
C2
0.1uF R14
1
C5
0.1uF
R20 100R
R22 100R
R29 100R
C4
0.1uF
R7 100
R5 100
R3
100k
R39 1K
1
2
3
4
5
6
7
CN1
A2001WV-7P
Min3.3V Typ5V
DGND
C111
0.1uF
AGND
C7
0.1uF
C112
0.1uF
C3
0.1uF
X1 needed for TUNER
VD
R12
10K
DGND
SDTO
1
SCLK
2
LRCK
3
MCLK
4
FILT+
5AINL 6
VQ 7
AINR 8
GND 9
VA 10
IC3
CS5344-CZZ
SDTI
1
SCLK
2
LRCK
3
MCLK
4
VQ
5FILT+ 6
AOUTL 7
GND 8
VA 9
AOUTR 10
IC1
CS4344-CZZR
AGND
VA
C49
0.1uF
AGND
R52
10
FB2
BLM18BD102SN1D (S)
R35
10k
R49 100R
AGND
C33
1uF
AGND
VA
AGND AGND
SDTO
MCLK
BCLK
LRCK
SDTI
MCLK
BCLK
LRCK
VA
AGND
C40
100pF
AGND 25V
C46
4.7uF R28
NM
VA
AGND
C10
NM
AGND
VA
AGND
AGND
WD1
25V
C22
4.7uF
C31
0.1uF
C32
0.1uF
C13
0.1uF C12 0.1uF
C21
0.1uF
C30
1uF
C14
1uF C11 1uF
FB1
BLM18BD102SN1D (S)
R44
1k
C28
NM
C9
NM
C18
1000pF
C19
4700pF
R34
NM
R31
NM
R25
10
R10
NM
R9
NM
R19
10k
R18
10k
C29
NM
R32
NM R33
NM
VA
AGND
R48
22k
R45
15k
C41
0.1uF
R46
22k R47
22k
C25
NM
C27
1uF
Q1
NM
VD
IN_AD_L
IN_AD_R
OUT_DA_L
OUT_DA_R
C8
NM
C17
1uF
R8
NM
R17
4.7k
Q2
2SC1623RLT1G
R13
NM
1
2
3
P1
Header 3
ERP_SW
PWR_CONTROL
1
2
P2
Header 2
PWR_LED
R38
1K
VA
DGND
PWR_LED
ERP_SW
PWR_CONTROL
WD2
SG2 SG3
NT2
0R
SG1
AGNDAGND AGNDDGND DGND
1
2
3
4
5
6
CN2
IN_AD_R
OUT_DA_R
R119
47K
VD
NT3
0R
AGND DGND
3
4
4-1
29/05/18
11/07/18
23/07/18 Remove D8 and D11
Change R98 from 2.2Meg to 100K
Add C36
PS
PS
PS

1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
4
VOX Amplification ltd.
1 Harrison Close
Knowlhill
Milton Keynes
Bucks, MK5 8PA 4
X-16709 AC30S1 Power
VD-A30034
ISS4-1
15-Aug-18
Title
Drawing Number: Date:
Revision: Sheet
of
Designed By: Checked By:
P Scarffe D Clarke
Issue ChangeDate Signed
CHANGE HISTORY
D16
1N4007
D12
1N4007
D17
1N4007
D13
1N4007
GND
R87
22K 1W
B+1
F3
T500mAL 250V
C60
F2
T6.3AL/250V
C103 1nF 1kV
C102 1nF 1kV
C1061nF 1kV
C105 1nF 1kV
!
T1
!
R114
1K 10W
B+2B+3
D10
1N4007
D9
1N4007
R92 68R 1/2W
R94
180R 1/2W
+15V
-15V
!
D7
15V 1.3W
D6
15V 1.3W
H1
H2
+5V
~250V
~250V
0V
6.3V~
13.5V~
C83
100uF 16V
0R47 Fusible
F4
D5
NF
1
2
P23
Header 2
IN 1 OUT
3
GND
U3
NJM7805
1
3
2
Chassis Earth
F1
SURGE GUARD 2
SCK15105MSY
!
!
!
!
POWER SWITCH
L
N
E
SURGE GUARD 1
SCK15105MSY
R26
3K3 R61 3K3
R91
3K3 R95 3K3
R77
470R 1/2W
R103
470R 1/2W
R93
470R 1/2W
R51
470R 1/2W
J2
1/4" Spade
J6
1/4" Spade
J5
1/4" Spade
R75
47R 10W
C71
220uF 50V
GNDb
29
V6
Tube EL84
29
V5
Tube EL84
29
V4
Tube EL84 29 V3
Tube EL84
TRANS1
OP TX
TRANS1
OP TX
!
B+2b B+1
B+2bB+2
FROM MAIN PCBTO EL84 PCB
1
2
3
P19
Header 3 - Wide
3
2
1
P13
Header 3 - Wide
H1
H2
1
2
3
P10
Header 3 - Wide
GNDb
FROM PREAMP OUT P22
From CPU
NOT FITTED
NT1 GND1
C88
1
2
0.156"
3
3
P20
1
20.156"
P21
1
20.156"
P12
P17
1/4" Spade
P16
1/4" Spade
Chassis_OUT
R110
Ferrite
BPJ-BBB-MONO
J7
P15 P14
LS1
16ohm Speaker
!
!
!
P8 Header 3 - Wide
+15V
-15V +5V
TO FX S/R P6
C97
3300uF 16V
C98
3300uF 16V
C93
3300uF 16V
HDC+
HDC-
GND1
C101
NF
C104
NF D15
NF
R113
NF
R88 82R 2W
To ErP board
FITTED FOR ErP VERSION ONLY
ErPVersion: R94 = 22R 1/2W
non-ErP Version: R94 = 180R 1/2W
D14
KBU4A
TWIST OPTX WIRES
GND1
H1
H2 H1b H2b
H1b H2b
STANDBY SWITCH
310V
R115
220K
R116
220K
2
3
1
ARCOLECTRIC 3900BA
S1
2
3
1
ARCOLECTRIC 3900BA
S2
1
2
3
P7
-15V
3
4
4-1
29/05/18
11/07/18
23/07/18 Remove D8 and D11
Change R98 from 2.2Meg to 100K
Add C36
PS
PS
PS

1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
1
VOX Amplification ltd.
1 Harrison Close
Knowlhill
Milton Keynes
Bucks, MK5 8PA 4
X-16709 AC30S1 Preamp
VD-A30031
ISS4-1
15-Aug-18
Title
Drawing Number: Date:
Revision: Sheet
of
Designed By: Checked By:
P Scarffe Dave Clarke
Issue ChangeDate Signed
CHANGE HISTORY
BPJ-BBB-MONO
J1 VR1
A500K
R40
0R
R37
1M
C26 22pF 50V
R36
10K
R24
FB
GND
R54
1.5K
R50
C52
470pF 500V
C55
GAIN
CHASSIS_IN
C24
100nF 50V
R57
2.2K
R53
2.2M
C54
120pF 500V
R56
1K5
A1M
Treble
VR3
Bass
VR2
A1M
R86
100K
R72
10K
C80
56pF 500V
C108
47pF 500V
R62
R105
100K R109 100K
R104
1M
R106
47K
R107
1K2
R108
1M
2 7
V1
12AX7
C72
22nF 400V
C99
100nF 400V
C109
100nF 400V
C107
100nF 400V Master Volume
VR5
A500K
B+3
C38
100nF 50V
R100 C92
22nF 400V
R101
10K
R102
220K
R63
10K
R55
10K
GNDGND
C20
10uF 350V C67 10uF 350V
C45
C95
R99
10K
C94
10uF 350V
GND
2 7
V2
Tube 12AX7
D1
1N5931B
D2
1N5931B D8
NF
1
2
3
P22
Header 3 - Wide
GND
TO POWER AMP P10
HDC+ HDC-
HDC-
HDC+
P9
Header 3 - Wide
Send to Reverb PCB P3
SCREENED WIRE
SCREENED WIRE
R90
LINK
R89
NF
GND
Use Pin 2 to screen 1 and 3
Use Pin 2 to screen 1 and 3
GD
S
Q4
LND150N3-G
GD
S
Q3
LND150N3-G
Text
R117
22K R118
10K
GND
18V, 1W
18V, 1W
R11
10K
R30
10K
C36
22nF 400V
3
4
4-1
29/05/18
11/07/18
23/07/18
PS
PS
PS
Remove D8 and D11
Change R98 from 2.2Meg to 100K
Add C36

1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
1
VOX Amplification ltd.
1 Harrison Close
Knowlhill
Milton Keynes
Bucks, MK5 8PA1
AC30S1 ErP
VD-A30035
09-Mar-18 9:01:52 AM
V:\Altium\Projects\AC30C1\AC25C1 ErP\AC25 ErP.SchDoc
Title
Size: Number:
Date:
File:
Revision:
Sheet ofTime:
A3
Author:
Checked By:
P. Scarffe
Issue Reason for change Date Revised by
POWER TOGGLE (ON)-OFF-(ON)
P3
1/4" Spade
P6
1/4" Spade
Q3
2N3904
PWR_CONTROL
P5
1/4" Spade
P4
1/4" Spade
P2
1/4" Spade
P1
1/4" Spade
BRT3-SS-112DM
K1
GND
PWR_CONTROL
21
3
SW2
See-Plus Industrial SLIDE SWITCH, 1P2T, SS-12D11 (CG)
R10
1KErP
Disabled
Enabled
TO PRIMARY OF MAIN TX
R7
82R
R11
1K
+5V
TO REV PCB
R6
1K
R2
10K
P10 1/4" Spade
D15
Diode 1N4148
D1
D3
Diode 1N4007
PRIGND
1
42
3
S1
K817P
R21
47K 5W
SW1
CHILY 6016
SAFETY CRITICAL COMPONENT
REPLACE ONLY WITH THE SAME
TYPE & RATING
IF IN DOUBT CONTACT SUPPLIER !
!
!
!
!
ON
OFF
1
2
3
P7
Header 3 - Wide
R1
LINK
Q1
2N3904
D4
Diode 1N4148
R4
10K
GND
LINK
R14
1uF 6.3V
C13
+5V
GND
FROM MAIN PCB
ISS2
BLACK WIRE
WHITE WIRE
1
2
P11
Header 2
1
2
P9
Header 2
10K
R5
10K
R3
GND
1
2
3
P8
Header 3 - Wide
-15V
-15V
GND
Q2
2N3906
PRIGND
C3
TO SURGE GUARD 1
TO AC INLET NEUTRAL

V
OX AC30S1 Parts List : SAFETY CRITICAL COMPONENT.
EXP=EXPLODED VIEW Item No
Code Part Name Location EXP Reference QTY
530000003637 PCB ASSY POWER COM POWER for 220-230V onl
y (
R94 = 22R 1/2W
)
530000003638 PCB ASSY POWER JP AC30S1 POWER others
(
R94 = 180R 1/2W
)
530000003645 CC 500V 10P 10% RLT POWER C55 1
530000003640 CC 500V 47P 10% RLT POWER C108 1
530000003649 CC 500V 56PF 10% RLT 5X5 POWER C80 1
530000003644 CC 500V 120P 10% RLT 5X5 POWER C54 1
530000003643 CC 500V 470PF 10% RLT POWER C52 1
530000003647 CC 500V 1000P 10% RLT POWER C63 1
530000002605 CC 1000V 1000P 10% RLT POWER C102,C103,C105,C106 4
530000003639 CC 1KV 0.01u 20% RL POWER C68, C87, C100 3
530000002418 CC 500V 10NF 10% RLT 5X5 POWER C45 1
530000003648 CC 500V 22NF 10% RLT 5X5 POWER C70, C72, C92 3
530000003642 CM 400V 0.1U 5% RB POWER C95, C99, C107,C109 4
530000002417 CE 400V 10U 20% RL 10X16 POWER C20, C67, C94 3
530000003646 CE 500V 33U 20% RL 16X25 POWER C60 1
530000003651 CE 500V 47U 20% RL 16X30 POWER C96 1
530000003650 CE 500V 100U 20% RL 18X POWER C88 1
530000003374 DZ 1W 18V 5% 1N5931B AT POWER D1, D2, D8, D11 4
530000003181 DZ 1.3W 15V 10% AT POWER D6,D7 2
530000002089 DIODE IN4007-F AT POWER D9, D10, D12, D13, D16, D17 6
530000003641 RMF 1W 22K 5% AT POWER R87 1
530000003653 RWR 10W 1K 5% SQZ RL POWER R114 1
530000003654 RMF 1W 56K 5% AT POWER R68 1
530000003655 RMF 2W 82R 5% AT POWER R88 1
530000003377 VR ROTARY A500KX1 20% V POWER VR1, VR5 2
530000002631 VR ROTARY A1MX1 30% V POWER VR2, VR3 2
530000003656 VR ROTARY 10KBX1 20% H POWER VR4 1
530000002094 FUSE T6.3A 250V POWER F2 1
530000001929 FUSE T500MA 250V POWER F3 1
530000003652 RMF 1/4W 0.47R 5% AT POWER F4 1
530000002060 SOCKET 9PIN 500V D=22 POWER V1,V2 2
530000003657 PCB ASSY AMPLIFIER COM AMPLIFIER 31 1
530000003658 RWR 10W 47R 5% SQZ RL AMPLIFIER R75 1
530000002060 SOCKET 9PIN 500V D=22 AMPLIFIER V3,V4,V5,V6 4
530000003659 PCB ASSY FX COM AC30S1 FX 27 1
530000002637 DZ 1/2W 15V 5% TEMIC AT FX D3, D4 2
530000003660 IC TL072CDR OPAMP DUAL FX U1, U2 2
530000003661 PCB ASSY LED COM AC30S1 LED 50 1
530000003662 PCB ASSY OUTPUT COM OUTPUT 26 1
530000003663 PCB ASSY REVERB COM (DATA) REVERB 45 1
530000003664 PCB ASSY ERP EU UK ERP 36 for 220-230V Onl
y
1
530000002089 DIODE IN4007-F AT ERP D1, D3 2
530000003385 TR 2N3904TA RLT ERP Q1, Q3 2
530000003665 TR 2N3906 RLT TO92 ERP Q2 1
530000003178 RWR 5W 47K 5% SQZ RL ERP R21 1
530000003177 RELAY 12V 0.033A SPST RE ERP K1 1
530000003180 PHOTOCOUPLER EL817 ERP S1 1
530000003666 PCB ASSY SW EU UK AC30S1 SW for 220-230V Onl
y
1
530000003387 SW SLIDE SPDT 12V 0.1A SW SW2 1
530000003667 HANDLE-TOP 187X25.8X15.8 2 1
530000001874 Logo 45X11 3 1
530000001584 T5729 G12P-80 16OHM [OIC] VOX 9 Loud S
p
eake
r
1
530000002046 VENT-LARGE PP BLK 94V0 12 3
530000002923 KNOB-CHICKENHEAD AC4C1 16 5
530000002617 RUBBER RING(COMPACTRON) 18 2
147

Code Part Name Location EXP Reference QTY
530000002080 VALVE COMPACTRON 12AX7B 19 2
530000003671 XFORMER PWR 120V 109W/120V
530000003672 XFORMER PWR 240/250V 109W/AUS
530000003673 XFORMER PWR 230/250V 109W/EU/UK/ARG
530000003674 XFORMER PWR 100/250V 109W/JP
530000003675 XFORMER AUDIO 173.2/0-14.9-21.4V 22 1
530000002081 VALVE COMPACTRON EL84 28 4
530000002067 CLIP TUBE 34X27X68 METAL 29 4
530000002611 AC INLET M 3P 250V 10A(NT50H) 40 1
530000002101 THERMISTOR NTC 10R 20% 1
530000002641 SWITCH POWER SPST 250V 48, 49 1or2
530000003184 SWITCH POWER TOGGLE SPDT 48 for 220-230V Onl
y
1or0
530000001920 FUSE T1.25A 250V for 220-230V, 240V
530000002096 FUSE 2A 250V for 100V, 120V
530000003436 SWITCH CAPS TOP D8X18 PVC BLK 55 2
530000001887 CORD-AC POWER UK 3X0.75
A
ccessories CORD-AC
(
UK
)
530000001888 CORD-AC UL/CSA 125V 10A
A
ccessories CORD-AC
(
US
)
530000001889 POWER CORD 10A AUSTRALIA
A
ccessories CORD-AC
(
AUS
)
530000001890 CORD-AC CE 250V 10A
A
ccessories CORD-AC
(
EU
)
530000001891 CORD-AC JAP 100V 12A
A
ccessories CORD-AC
(
JP
)
1
1
121
53