Accuphase E-550 - BALANCE INPUT AMP ASSY (712-0097-00); Balance Input Amplifier Schematic Diagram

1
8
2
3
4
IC2A NJM5532D-D
7
6
5
IC2B
NJM5532D-D
1
8
2
3
4
IC1A
NJM5532D-D
+15V
-15V
+15V
-15V
100p
C5
100p
C4
220p
C6
220p
C7
100
R18
100
R19
20k
R20
20k
R21
100
R8
20k
R7
1
8
2
3
4
IC4A
NJM5532D-D
7
6
5
IC4B
NJM5532D-D
7
6
5
IC1B
NJM5532D-D
+15V
-15V
220p
C10
220p
C11
100
R23
100
R24
20k
R22
20k
R25
20k
R26
1 2 3 4 5
10
9 8 7 6
RELAY4
362-1202-00
1 2 3 4 5
10
9 8 7 6
RELAY3
362-1202-00
1 2 3 4 5
10
9 8 7 6
RELAY1
362-1202-00
1 2 3 4 5
10
9 8 7 6
RELAY2
362-1202-00
2
3
1
1G
JK4
302-8011-00
2
3
1
1G
JK5
302-8011-00
2
3
1
1G
JK2
302-8011-00
2
3
1
1G
JK3
302-8011-00
1A
1G
1B
5G
2A
2G
2B
3G
4G
6G
JK1
302-0412-00
LCH
LCH
RCH
RCH
CDBAL
LINE BAL
LCH
RCH
PREOUT
LCH
RCH
MAININ
2.2k
R4
2.2kR3
to IO relay K4
BAL_L
BAL_R
LGND
RGND
1
2
3
4
K3
308-0407-00
LCH
RCH
GND
GND
to Power Amp K2
-15V
+15V
/Ext
CDB/LB
/PreOut
+12V
+15V
-15V
PreLout
PreRout
GND
GND
to Mother K4
/Ext
CDB/LB
/Preout
+12V
+12V
+12V
+12V
+12V
CDB/LB
CDB/LB
/Preout
/Ext
100p
C1
100
R14
1
8
2
3
4
IC3A
NJM5532D-D
+15V
-15V
100p
C16
100p
C14
100
R27
7
6
5
IC3B
NJM5532D-D
100p
C12
100
R33
1
2
K1
309-2269-04
GND
GND
to Protection K5
1
2
3
4
K4 309-3460-04
D4
MA165
D3
MA165
D2
MA165
D1
MA165
220
R17
510
R13
220
R36
510
R32
GND
GND
10
R5
10
R6
220
R10
510
R12
220
R30
510
R31
100p
C2
100p
C13
220
R15
510
R16
220
R34
510
R35
220
R9
510
R11
220
R28
510
R29
100k
R2
100k
R1
100u
16V
C18
100u
16V
C20
100u
16V
C19
100u
16V
C17
1
2
3
4
5
6
7
8
9
10
11
12
K2
309-1231-04
100u
25V
C3
100u
25V
C15
47u
25V
C9
47u
25V
C8
B A L A N C E I N P U T A M P A S S ' Y ( 7 1 2 - 0 0 9 7 - 0 0 )
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2
2
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