Text preview for : AT-112 Schematic Diagram.pdf part of B-52 AT-112 AT-112 Guitar Amplifier B-52
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1
2
3
4 +15V D5 IN4148
5
6
C49 0.1u AGND
JK?
R2 2K2/1W 100K/1W 100K/1W C5 100p C2 10uF/450V C8 0.1u GND RL1 +12V D1 1N4004 C4 1uF C10 3 250p/CEAMIC VR1 A250K 2 GND 3 C1 10uF/450V R1 4K7/1W C21 +12V 1uF D3 0.022uF/FILM
B+4 C38 0.1u R46 2M2 R101 470K R47 100K D4 IN4148 R55 1M C39 0.047u Q1 -15V R75 100K C50 0.1u AGND C58 10u IC1BA NE5532 D7 D6 IN4148 IN4148 R48 1K
3 2
IC1A NE5532
INPUT D R8 10K
R6
C3 470p
1
+
R49 100R
C52 10u +15V -15V
R50 1K VR11 B10K 2 R74 10R
R5
R4 100K/1W C7
R3 100K/1W
VOLUME
1
6
V1 12AX7EH
C11 0.022u 0.001u C13
C12 0.1uF/FILM R12 470K R23 220K
2
VR3 A250K
2 7 3 8 4 5 9
BASS
1 3 2
R11 10K
1
6
V2 12AX7B
2 7 3 8 4 5 9
R10 10K
1
D8 4148
6V3 R22 R21 1M 1K5 C18 10uF
6V3 R19 220K
C19 0.47uF/FILM
C16 0.001u
VR4 B10K R15 1K5
6V3
6V3
RUSSIA
R14 1K5
R13 220K
C46 22p
1
+
2
R20 4K7
R18 3M3
R17 10M
R16 3M3
R24 470K
MIDDLE
1
J103
R112 Q6 2N5551 Q7 6K8 2N5551 R115 4K8 C20 1uF +12V D2 GND RL2 1N4004 LED1 RED LED2 GRN R35 470K V3 12AX7B R36 220K 6V3 6V3 R33 1K5/1/2W 6V3 R41 560R R40 1M B+4 R26 4K7/1W C23 3 C22 VR5 B250K 2 330p Q5 A1015GR R108 6K8 R28 220k 3 R27 220k C55 0.1u C30 0.0033uF -15V R57 4K7 C47 0.1u C59 + 10u TANT C41 0.001u 470K R100 R58 470K R59 1K C48 0.1u C60 10u TANT + R56 4K7 C40 100p R107 33K +15V
R114
IC4B 4
AGND
47K C117 0.1u C116 DGND 0.1u
4070N
R104 10K R103 10K R99 10K
R25 10uF/450V 100K/1W C24 4K7/1W R30 C27 470p C26 1000p R29 100K/1W
C25 10uF/450V
C
IC4C 4070N 8 10 9 7
+12V
R105 10K DGND
C114 0.1u C115 0.1u
TREBLE
470p R31 33K
R106 470K DGND
GND R32 470K C29 0.001uF
C32 0.022uF/FILM
CHINA
R34 4K7/1W V4 12AX7B GND
C28 10uF/450V
1
RUSSIA
3
OVERDRIVE
CONTOUT
1 6 2 7 3 8 4 5 9
1 6 2 7 3 8 4 5 9
C33 0.022uF/FILM
C31 0.022uF/FILM
2
VR6 A1M
BASS
R110 6K8 R69 10K -15V R117 4R7 1/2W CN1 CN2 R67 1K IC2B NE5532N 3 C61 10u
+15V R61 4K7 Q3 TIP29 R63 2R2/1/2W
100K
GAIN
MIDDLE
R38 220K
2
0.47uF/200V
2
2
2 VR7 A1M
2 3
IC2A
C37 0.68uF
NE5532N
AGND R130 100 6.3V R129 100 B C78 + 1000uF/35V 1N4004 F1 C98 + 1000uF/35V D16 D15 1N4004 1N4004 1000uF/35V SW2-1 C75 0.01u F2 1.5FA AC1 D12 B+1 B+2 B+3 1N4007 SW1-1 B+4 6.3V AGND C67 R81 7805 1 7815 3 2 +12V 3 0.047uF VR15 A1M + C77 2200uF/35V 0.1u C91 + C81 22uF/25V C80 0.1u Error : AT112.jpg file not found. C45 22p R73 68K +15V R77 100K/1/2W C65 0.022uF B+3 2 1
-15V
C43 22p
C86 250P R94 82K
8 1 7 2 6 3
JK4 SPKR OUT
0.1u
4K7
C88 1000u/25V
220K
R45 33K
R62
R64 Q2 2R2/1/2W TIP30
R65 OUT IN R68
+
R66 100K
1K C56 0.68u
1N4148
R44 2K7
R43 1K5
R39 470K
0.022uF/FILM 1
1
D11 1N1004 D9 1N1004
R42 100K/1W
1
3
1
C44
1
6
7
D10
D14 C97 +
RUSSIA
3 R86 4K7 1 5 V6 5881 4 R88 470R/2W
5 4 SW1
R91 4K7
L FUSE G N
R76 82K/1/2W C64 100p C74 0.0022uF
TOL1 CHOKE
R118 1K2/1W
R121 10K/2W
C57 0.1u IC3A
2 3
SW2-2 BR2 C76 0.01u F3 1.5FA
1
CHINA
V5
C66 0.022uF
R84 220K
7 2 8
1
6
NE5532N C51 -15V 0.1u
2 7 3 8 4 5 9
BIAS
R90 1R/1W
B+2
B+1
L? L
16R 8R
4R
R96 200 3W D13 1N4007 Q9 SW1-2
12AX7
7 2 8
+ C73 120uF/500V
+ C85 100uF/500V
+ C87 47uF/500V
+ C82 47uF/500V
R85 220K R87 4K7 5 1 R79 1M
1K5 1/2W
V7 5881 4
AGND +15V + C70 22uF/25V R78 1M
R80 470R
R89 470R/2W
R92 2 VR14 A5K 1
R93 1K
BIAS SUPPLY
R97 A 100R/1W + C83 R98 4K7 VRX 25KA -45VDC- -55VDC
R95 200R3W +
R116 4K7 1/2W C68 2200uF/63V
TIP42 D17 1N4144 D18 1N4144 C92 0.1u TIP42 Q8 + C72 22uF/25V -15V C93 0.1u C71 10uF
3
3
+
R81 10K/1W
6V3
6V3
2 1
RS 22K C84 10uF/100V
100uF/100V
C69 + 2200uF/63V R102 4K7 1/2W
C62 0.1uF
R82 4K7
GND
AGND
1
2
3
4
5
+
VR10 A1M
R37 10K
C35
6V3
C34
VR9 B25K
VR8 A500K
R72 22K
R60
3
1
1
3
5
Q4 J103
REVERB
+
RUSSIA
R9 100K
TREBLE
1 3
VR2 A1M
0.022uF/FILM 2
R7 3M3
C9 22pF
C6
1N4004 RL3
9 8 7 3 2 4 5 6 1
D JK3 EFF SEND
7
R53 4k7
5 6
R52 1K R54 1K R51 220K 10u
C53
+
1
C54 10u
VR12 B250K AGND
9 8 7 3 2 4 5 6 1
JK2 EFF SEND
5 6
R113 10K +15V DGND
IC4A 1 3 4070N 2 12 13 IC4D 4070N
JK7 FOOT SITCH R111 6K8 R109 Q10 33K A1015GR
11
CH SELECT SW2
C
VR13 B10K 2 R71 47K
R70 1M
B
JK5 SPKR OUT
JK6 LINE OUT A
6