Accuphase A-45 - Schematic Diagram; page13_MasterCircuit

N
L
E
N(W)
AC INLET
301-3304-00
21
S001
354-1023-00
!
Attention mark indicating critical components for safety.
Replacement must be made with identical parts of specified part number.
L-
R+
L+
AC 33V
-43.5V
+43.5V
GND
L OUT+
L O- R O- R O+ L O+ L O+
R OUT+
R O+
BRN
-43.5V
+43.5V
GND
TS L
6
5
4
3
2
1
!
!
!
+6.6V
-3dB
-6dB
-12dB
AC7V
AC0V
AC6.9V
+43.5V
M_-20dB
M_MUTE
IC OUT
BAL
BRG
GND
+6.6V
-3dB
-6dB
-12dB
+6.6V
-3dB
-6dB
-12dB
PL3PL2PL1
!
!
T001
ORG 120V
BRN 100V
GRY 0V
YEL 120V
RED 100V
WHT 0V
PUP
RED
BLK
YEL
BRN
GRN
BLU
ORG
YEL
BRN
TF
47n
C001
47000u
63V
C002
47000u
63V
C003
1
2
K2
308-0207-00
1
2
3
4
K1
308-0416-00
1
2
K4
308-0212-00
1 2
TP.2
308-0221-00
1 2
TP.1
308-0221-00
POWER AMP Ass'y
+-
+-
-+
-
+
1
2
K2
308-0207-00
1
2
3
4
K1
308-0416-00
1
2
K4
308-0212-00
1 2
TP.2
308-0221-00
1 2
TP.1
308-0221-00
POWER AMP Ass'y
+-
+-
0.1R1
Lch OUTPUT Rch OUTPUT
360W(37.95V)4 ohm MONO
180W(18.97V)2 ohm/ch
L NFB R NFB
GND BRG
G
L+
G
L-
R+
G
G
R-
1
2
3
4
5
6
7
K3
308-0705-00
1
2
3
4
5
6
7
K3
308-0705-00
GND
+43.5V
-43.5V
L O+
L O+
L NFB
L.H.G
GND
+43.5V
-43.5V
R O+
R O+
R NFB
R.H.G
+43.5V
-20dB
MUTE
IC OUT
WHT
1 2
K1
308-0206-00
PL3PL2PL1
0.1R1
1 2
K1
308-0206-00
AC0V
AC6.9V
TS R
D,U(100,120V)
E,B(230,240V)
716-0764-01
716-0716-03
JUMPER
J2,3
FUSE
J1
T:10A
T:5A
Remarks:Circuit shows Dmodel(AC100V)setting
Ass'y No.Type
716-0764
INRUSH PROTECTOR Ass'y
LED Ass'y 723-0134
SWITCH Ass'y
METER LAMP Ass'yMETER LAMP Ass'y
723-0135 723-0135
L ch
717-0090
717-0090
GND
GND
L+
GND
L-
R+
GND
GND
R-
GND
GND
+43.5V
-43.5V
+6.6V
-3dB
-6dB
-12dB
BAL
L_BRG
GND
GND
BRG
1A
1G
2G
JK1
1A
1G
2G
JK2
1
2
3
4
5
K1
308-0518-00
INPUT Ass'y
716-0760
LEFT BALANCED INPUT
UNBALANCED INPUT
RIGHT BALANCED INPUT
UNBALANCED INPUT
IMPEDANCE 40k-OHM
R CHANNEL INPUTS
L CHANNEL INPUTS
IMPEDANCE 40k-OHM
INPEDANCE 20k-OHM
IMPEDANCE 20k-OHM
0.76V STEREO
0.76V STEREO
1.51V MONO
LEFT CHANNEL
RIGHT CHANNEL
45W(18.97V)8 ohm/ch
+43.5V
-43.5V
250250187
250250
309-5162
309-5163
309-5164 BLU
309-5165 WHT
309-3469
309-3472
309-3470
309-0885
309-0884 309-1128
309-3471
309-5160 309-5161
309-0883
309-1076
309-1233
1 2
K1
308-0214-00
178-2043-00
-+
1 2
K1
308-0214-00
R-
DIODE(A) Ass'y716-0765
BRNBLU
METER CONNECTOR
716-0766 716-0766
R ch
178-2043-00
-+
METER CONNECTOR
(BLK)(BLK)
(BLK)
BLK,GRN BLK,YEL
(BLK)
1
2
3
4
K1
308-0407-00
1 2 3 4
K3
308-0408-00
1 2 3 4 5
K4
308-0508-00
1
2
3
4
K5
308-0407-00
1 2 3 4 5 6 7 8
K6
308-0807-00
K7
K8
1
2
3
4
K2
308-0417-00
2
3
1
1G
JK1
302-8011-00
2
3
1
1G
JK2
302-8011-00
1
2
3
4
5
6
7
8
9
10
11
12
K3
308-1206-00
1
2
3
4
5
6
7
8
9
10
K1
308-1027-00
1
2
3
4
5
K2
309-2578
1
2
3
4
5
6
7
K5
308-0707-00
1
2
K1
308-0212-00
1
2
3
4
K6
308-0407-00
1
2
3
4
5
6
7
8
9
10
11
K3
308-1102-00
1
2
3
4
5
6
7
8
K4
308-0805-00
1
2
3
4
5
6
7
8
K2
308-0808-00
1
2
K7
308-0239-00
GRN
(BLK)
1
2
3
4
K1
308-0412-00
1
2
3
4
5
6
7
8
K1
308-0809-00
-20dB
METER
INPUTOFF
6A 5A 4A
3A 2A 1A
S1
6A 5A 4A
3A 2A 1A
S2
6A 5A 4A
3A 2A 1A
S3
1
2
3
4
5
6
7
8
9
10
11
K1
308-1103-00
716-0761
K1
K2
D1
S15VB20
2W
10
R1
309-5167
309-5166
!
!
!
K1
314-0530-00
K4
314-0536-00
K2
314-0536-00
K5
314-0536-00
K3
314-0536-00
!
!
100nC1
0.5W
15kR1
0.5W
15k
R2
1 2 3 4
K1
308-0408-00
10nC2
10nC3
K2
AC1 AC2
-
+
D1
S15VB20
DIODE(B) Ass'y
716-0767
BALANCE INPUT Ass'y
716-0759
PROTECTION Ass'y
720-0078
CONNECTOR Ass'y
716-0763
GAIN SWITCH Ass'y
716-0762
GRN BLK BLK YEL GRY GRY
RED BLK VIO ORG
GND
GND
L+
GND
BODY(GND)
GND
R+
L+
R+
G
G
G
-(INV)
+(NON-INV)
GND
BODY(GND)
GND
+(NON-INV)
BODY(GND)
-(INV)
GRY GRY
BLK
GND
GRY
BLK
BLK GRY
309-2285
314-1134
GRN
1
2
3
4
5
K2
(Class A)
BLK
VIO
GRN
BLU
GRN
RED
BLK
GRY
RED
YEL
BLU
YEL
VIO
GRY
GRN BLU GRN BLK GRY YEL BLU
YEL
YEL
GRN
ORG VIO BLK RED
G
RED
WHT
G
GRY
BLK
G
RED
WHT
G
BLK
G
RED
WHT
G
YEL
BRN
YEL
BRN
G
RED
WHT
G
510-2061
BLU
AC 0V
BLK
(WHT)
GND
HOT
(BLK)
AC 43V
AC 43V
AC 43V
AC 43V
T.S.
T.S.
YL
BK
BK
BK
GN
RED VIO RED BLK VIO
RED
VIO
BLK
Ass'y Ass'y
BAL UNB
309-4128
-
1
3
-
A - 4 5 M A S T E R C I R C U I T D I A G R A M
!
!