NAD T748 Service Manual page 16

IC 301 : R2A15218FP (INPUT SELECTOR TONE CONTROL)
BLOCK DIAGRAM AND PIN CONFIGURATION (TOP VIEW)
50
MUTE 51
AVEE 52
AVEE
N.C.
53
0/-6/-12/-18dB
ADCL 54
ATT
ADCR
55
AGND 56
MAIN
N.C.
57
INR1
58
INL1
59
INR2
60
INL2
61
INR3
62
INL3
63
INR4
64
INL4 65
INR5 66
INL5 67
INR6 68
INL6
69
INR7
70
INL7
71
INR8 72
INL8 73
N.C.
74
INRA/RECR1 75
INLA/RECL1
76
N.C. 77
INR9
78
79
INL9
N.C.
80
81
49 48 47 46 45 44
MCU
I/F
SUB
REC
82 83 84 85 86 87
43 42 41 40 39 38
Bass/ Treble
0~-95dB,
-14~+14dB
-∞
(2dB step)
(0.5dBstep)
Tone
Tone
Bass/ Treble
0~-95dB,
-∞ -14~+14dB
(0.5dBstep)
(2dB step)
88 89 90 91 92 93
2-4
37 36 35 34 33 32
AVCC
+42~0dB
(0.5dBstep)
Bypass
Tone
Tone+MIX
+42~0dB
(0.5dBstep)
Tone+MIX
Tone
Bypass
+42~-95dB,
-∞(0.5dBstep)
+42~-95dB,
-∞(0.5dBstep)
+42~-95dB,
-∞(0.5dBstep)
+42~-95dB,
-∞(0.5dBstep)
+42~-95dB,
-∞(0.5dBstep)
+42~-95dB,
-∞(0.5dBstep)
94 95 96 97 98 99
31
30 AVCC
N.C.
29
28 TREL
27 BASSL2
BASSL1
26
N.C.
25
FRC
24
FROUT
23
22 AGND
21 FLOUT
20 FLC
AGND
19
CC
18
COUT
17
AGND
16
SWOUT
15
SWC
14
13 N.C.
SRC
12
SROUT
11
AGND
10
SLOUT
9
SLC
8
AGND
7
SBRC
6
SBR OUT
5
AGND
4
SBL OUT
3
SBLC
2
N.C.
1
100