McIntosh C49 - Page 22

39 40
DISPLAY/LEFT PUSHBUTTON/RIGHT PUSHBUTTON/HEADPHONE 751756 SCH 1 of 2
876
5
VFD CS
VFD DA
VFD C L
DS1 DS3
2.74k
R28
12.1k
R17
12.1k
R22
12.1k
R41
.1µF
C13
I2C DA 1
I2C CL 1
.1µF
C12
10µH
L1
100µF
C11
J9:2
J9:1
J9:4
J9:6
J9:3
DS5
A = 0 1 1 (3)
+5VD +5VD
+3.3VBU
+5VD
+3.3VBU
INPUT
LOGO
VOLUME
3
1
2
Q1
+5VD
D I SPLAY
5
Q3
7
VSS
8
Q1
5
A1
2
A2
3
Q4
9
Q5
10
Q7
12
SDA
15
SCL
14
Q2
6
A0
1
Q0
4
Q6
11
VDD
16
NC
13
U1
HEADPHONES MUTE
12.1k
R26
DS2
+5VD
2.74k
R19
DS24
2.74k
R47
DS25
2.74k
R20
2.74k
R21
DS8
DS9
2.74k
R24
DS10
2.74k
R42
2.74k
R44
DS12 DS13
2.74k
R46
DS14
TONE1 OUTPUT 2 STANDBY/ON
+3.3VBU
2.74k
R49
DS15
2.74k
R18
DS7
DS19
2.74k
R31
DS20
2.74k
R34
DS21
2.74k
R37
DS22
2.74k
R39
DS23
2.74k
R30
DS16
2.74k
R33
DS17
2.74k
R36
DS18
6.81k
R48
DS4
FP RST
+5VD
6.81k
R16
.1 88
MP4
.1 88
MP1
.1 88
MP2
.1 88
MP3