Vox AC15C1 Service Manual page 3

SCHEMATIC DIAGRAM
C29
HTR1a
100nF
R12
3K3
C25
SG1
R11
3K3
C17
HTR2a
VOUT+
J10A
R89
220K
TREM_OUT
R86
220K
VOUT-
J10I
R85
1Meg
GND
+27V +27V +27V
U1C U2C U3C
10nF 100V
C18
NJM2147 NJM2147 NJM2147
GND
10nF 100V
-27V -27V
C200
-27V
C30
100nF HT
D1
KBU4A
C28
C27
100nF
100nF
J10B
V4
J9B
Tube EL84 9 R76
R65 2
470R 1/2W
J9A 3K3
Htr1 Htr2
J9C J10C
J9D J10D
J9E J10E
J9F J10F
R77 R79
J9G J10G
120R 5W
3K3
J9I
J9H J10H
C54
2
220uF 50V
9
GND
Tube EL84
R83
470R 1/2W
V5
+27V +27V
10nF 100V
C42
U4C U5C
NJM2147 NJM2147
GND
10nF 100V
C201
-27V
-27V
R80
1K 5W
C53
C52 C62
C59
10nF 500V
F1
T250mAL
GND
!
TCN1 CON5
LED1
1 1
RED LED
2 2
POWER ON
!
J7
J16
J13
T2 16 Ohm
1/4" Spade
1/4" Spade
J11
8 Ohm
BPJ-BBB-MONO
IMPEDANCE SELECTOR
1/4" Spade
J15
J12
OP TX
J14
1/4" Spade
BPJ-BBB-MONO
SW-SPDT
1/4" Spade
J24
Chassis Earth
1/4" Spade
J25
1/4" Spade
- 4 -
1nF 1KV
1nF 1KV
C61 C65
MAINS TRANSFORMER
D4 D7
R88
180R 5W
J19
1N4007 1N4007 1/4" Spade
C60 C64
R87
180R 5W
1nF 1KV 1nF 1KV
J18
1/4" Spade
D3 D6
J23
1N4007 1N4007
1/4" Spade
J22
J17
1/4" Spade
J20
STANDBY
1/4" Spade
1/4" Spade
J21
R92
1/4" Spade
5K6 1W
D10
Diode 1N4007
D9
+27V
R84
220R 1/2W
1N4007
C57 C63
D5
1000uF 35V 1000uF 50V
27V 1.3W
GND
C55 C56
D2
1000uF 35V 1000uF 50V
27V 1.3W
D8
R78
220R 1/2W
-27V 1N4007
EXTERNAL SPEAKER (MUTES INTERNAL SPEAKERS)
EXTENSION SPEAKER (INTERNAL SPEAKERS CONNECTED)
+
16 Ohm
Speaker
AC15C2
Speaker 8 ohm ×2
AC15C1 Power Stage
Author: D Clarke
Checked By: E Tomiyama Size: A3 Number: 2 Revision: ISS3
Date: 24/11/2009 Time: 17:37:31 Sheet 2 of
File: V:\Altium\AC15ccV2\Releases\Release ISS3\Source\AC15C1_Power.SchDoc
!
! !
F4
1
L
3
SCK15105MSY E
2
SURGE GUARD 1
N
!
Power Switch
!
Chassis Earth
!
F3
2R2 FUSIBLE
!
F2
T6.3AL
Htr2 Htr1
R90 R91
220R 1/2W 220R 1/2W
SAFETY CRITICAL COMPONENT
! REPLACE ONLY WITH THE SAME !
TYPE & RATING
IF IN DOUBT CONTACT SUPPLIER
VOX R&D ltd.
64 Alston Drive
Bradwell Abbey
Milton Keynes
2 Bucks, MK13 9HB