Arcam CD73 Service Manual page 20

CD73
MAIN BOARD
U101: CXA2581N
4 3
AC AC
SUM VCA
-
+
RW/ROM
VC
A
6
-
B 7
+
C
8
D 9
RW/ROM
VOFST
+
VC
gm
F 10 -
gm -
E 11
+
VC
VOFST
B
-
C
+
A
D
APC-OFF (Hi-Z)
SW 12 RW/ROM
(H/L)
APC
PD 2
VC
LD 1
Vcc
22 5 27
COMPACT DISC PLAYER
23 24 26 25
EQ
15 RFAC
EQ_ON/OFF
RW/ROM
30 DC_OFST
29 RFDCI
DVcc
-
28 RFDCO
+
VC
17 FEI
DVcc
-
16 FE
+
DVC
VOFST
RW/ROM
VC
19 TE_BAL
RW/ROM
DVcc
-
18 TE
+
RW/ROM
21 CEI
DVC
DVcc
-
20 CE
+
DVC
VC
RW/ROM
-
DVC
VC +
VOFST
Vcc
VC
13 DVcc
DVC
+ +
14
MAIN BOARD
U102: LB1641
P1
3
5
IN1
1
GND
- 20 -
OUT1 VCC2 OUT2 P2
2 8 10 9
Input logic circuit
VCC1
7
4
VZ
6
IN2