Accuphase E-550 - LOGIC ASSY (721-0081-00); Logic Assembly Schematic Diagram

METER COM
METER R+
METER L+
AC26V -38V +38V GND
LchA LchG RchG RchA
Lch LGND Rch RGND
G
1
O1
2
H1
3
I1
4
V-
5
I2
6
H2
7
O2
8
V+
9
IC1
TA7318P-2
OL
1
CV
2
LH
3
AC
4
G
5
RD
6
MT
7
VC
8
IC2
UPC1237HA
330nC8
330nC3
2W1.8kR9
2W1.8kR22
2W10
R1
2W10
R2
22n
C1
2W10
R6
2W10
R5
22n C2
D3 MA167
4.7u
35V
C5
D1
MA165
L2
506-0008-00
L1
506-0008-00
to Power amp Ass'y K3
GND
TH
1n
C9
1 2 3 4
K3
308-0408-00
D2
MA165
LchB RchB
2W
270
R4
2W
270
R3
SPB
SPA
METER_MUTE
X1
RN2203
X2
RN2203
1
2
3
4
5
6
K4
308-0606-00
220
R18
220
R14
4.7M
R16
4.7MR13
7.5k
R10
7.5k
R15
47k
R11
47k
R17
36kR8
36kR7
100k
R21
75k
R12
12k
R20
22kR23
3
2
1
100k
VR1
583-0154-00
3
2
1
100k
VR3
583-0154-00
100kR19
220u
10V
C7
22n
C6
to Motherboard Ass'y K1
to Rectifier K2 to Balance Ass'y K1
1 2
K1
308-0212-00
LGND RGND
to Rectifier K2
1
2
K2
308-0214-00
1 2
K5
308-0206-00
22u
16V
C4
-GR
Q1
2SC2458_
-GR
Q2
2SC2458_
X3
RN1202
27k
R24
(GRN) (YEL) (ORG) (BLU) (BLK) (GRY)
to Speaker terminals
to Thermistor
1 2
K6
308-0239-00
P1 P3 P6 P2 P4 P5
2
5
16
3
4
RELAY1
362-2230-00
2
5
1 6
3
4
RELAY2
362-2230-00
3
2
1
1k
VR2
583-0134-00
3
2
1
1k
VR4
583-0134-00
-
2
9
-
P R O T E C T I O N A S S ' Y
LED_EXTPRE LED_MONI LED_REC LED_TONE LED_MONO LED_COMP LED_ATN LED_MC
LED_EXTPRE LED_MONI LED_REC LED_TONE LED_MONO LED_COMP LED_ATN LED_MC
from Meter Lamp (K3)
1 2 3 4 5 6 7 8 9
K1
308-0905-00
D1 BR1111R-B/C/D/E D2 BR1111R-B/C/D/E D3 BR1111R-B/C/D/E D4 BR1111R-B/C/D/E D5 BR1111R-B/C/D/E D6 BR1111R-B/C/D/E D7 BR1111R-B/C/D/E D8 BR1111R-B/C/D/E
D I S P L A Y A S S ' Y
( 7 2 3 - 0 1 1 6 - 0 0 )
X1
RN1204
X2
RN1204
/LED_B
/LED_A
LED_4
LED_1
LED_3
LED_2
/LED_B
/LED_A
LED_B
LED_A
100n
C1
VCC
LED_4 LED_1 LED_3 LED_2 LED_B LED_A /CLRLED /STBLED SCLK SDATA
LED_EXTPRE LED_MONI LED_REC LED_TONE LED_MONO LED_COMP LED_ATN LED_LOGO
1kR1
220p
C2
1kR2
220p
C3
EN_LED /LATLED SCLK SDATA
VCC
/RCON
1 2 3 4 5 6 7 8 9
K2
280-9009-00
METER_LAMP
METER_LAMP
PL1
176-4501-10
PL2
176-4501-10
PL3
176-4501-10
PL4
176-4501-10
LED_MC
1kR7 1kR3 1kR8 1kR4 1kR9 1kR5 1kR10 1kR6
LED_LOGO /RCON
VCC
to Display (K1) to Receiver (K1)
to Selector LED (K1)
from Logic (K2)
AC6V_1 AC6V_2
Q1
2SK2541_
X3
RN2226
Q2
2SK2541_
X4
RN2226
METER_LAMP
1
2
3
4
5
6
K1
308-0609-00
1 2 3 4
K4
309-3462-04
1 2 3 4 5 6 7 8 9
K3
309-0962-04
47u 35V
C4
D2
1SR139-400
D1
1SR139-400
1.00F
R11
1.00F
R12
1
2
3
K1
308-0308-00
1
2
3
4
K3
308-0411-00
to Power AMP Ass'y(L) K3
to Power AMP Ass'y (R) K3
to Transformer
to Protection Ass'y K3,6
+B
GND
-B
+B
GND
-B
GND
GND
AC
AC
GND
GND
+B
-B
GND
1
2
3
4
5
6
K2
308-0608-00
AC
D1
S10VB20
250V
10n
C5
250V
10n
C7
250V
100nC6
1
2
3
K4
308-0321-00
10000u
50V
C2
10000u
50V
C4
10000u
50V
C9
10000u
50V
C11
10000u
50V
C1
10000u
50V
C3
10000u
50V
C8
10000u
50V
C10
34.5V
-34.5V
( 7 2 0 - 0 0 7 5 - 0 0 )
P O W E R S U P P L Y A S S ' Y ( 7 1 9 - 0 0 5 8 - 0 0 )
M E T E R L A M P A S S ' Y
( 7 2 3 - 0 1 1 7 - 0 0 )