Sharp MD-C2 Service Manual page 86

MD-C2
ICU00 VHiLC75397E-1: Audio Processor (LR75397E) (2/2)
Terminal Name
Pin No.
52 L4 Input signal terminal
53 L3 Input signal terminal
54 L2 Input signal terminal
55 L1 Input signal terminal
56 VSS Power terminal
57* NC NO CONNECTION terminals. leave open or connect to VSS.
58 R1 Input signal terminal
59 R2 Input signal terminal
60 R3 Input signal terminal
61 R4 Input signal terminal
62* R5 Input signal terminal
63* R6 Input signal terminal
64 RSEL0 Input selector, output terminal
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
LSELO
49
L6
50
L5
51
L4
52
L3
53
1µF X 6
L2
54
L1
55
56
V
SS
NC 57
R1
58
R2
59
R3
1µF X 6
60
R4
61
R5
62
R6
63
RSELO
64
[10 = 39Hz] [10 =
[10 = 1984Hz]
0.47µF 0.47µF
+
–
+
–
– –
+ +
–
+
LC75397E
CONTROL
CIRCUIT
+
–
+ +
– –
48 48 48 47 46 45 44 43
0.47µF 0.47µF
[10 = 39Hz] [10 =
[10 = 1984Hz]
64 63 62 61 60
RBB1 1
RBB2 2
RBBOUT 3
RTIN 4
RF1C1 5
RF1C2 6
RF2C1 7
RF2C2 8
RF3C1 9
RF3C2 10
RF3C3 11
RF4 12
RTOUT 13
RVR1IN 14
RVR2IN 15
NC 16
17 18 19 20 21
Figure 86 BLOCK DIAGRAM OF IC
Function
[10 = 2000Hz]
[10 = 69Hz]
+
–
–
+
+
–
+
Lvref
–
CCB
LOGIC CIRCUIT
INTERFACE
Rvref
–
+
+
–
40 39 38 37 35 34 33 33
[10 = 2000Hz]
[10 = 69Hz]
59 58 57 56 55 54 53 52 51 50 49
48 LBB1
47 LBB2
TOP VIEW
46 LBBOUT
45 LBBIN
44 LF1C1
43 LF1C2
42 LF2C1
41 LF2C2
LC75397E
40 LF3C1
39 LF3C2
38 LF3C3
37 LF4
36 LTOUT
35 LVR1IN
34 LVR2IN
33 LVR3IN
22 23 24 25 26 27 28 29 30 31 32
– 86 –
10µF
LV3ROUT
+
32
PL
–
10µF
LV2ROUT
+
31 PL
–
10µF
LV1ROUT
+
30
PL
–
29 NC
NC
28
27 NC
V
DD
26
CE
CE
25
DI
µCOM
24 DI
10µF
CL
23
CL
TEST
22
22µF
Vref
21
20
NC
10µF
RVR1OUT
–
19
PL
+
RVR2OUT
–
18
PL
+
10µF
NC
17