McIntosh C50

11 12
DISPLAY 751113 SCH 1 of 4
2
GND (Pin 1)
5V (Pin 2)
SI/SO (Pin 3)
STB (Pin 4)
SCK (Pin 6)
.01uF
C207
.01uF
C206
INPUT_B
INPUT_A
22.1
R11
47uF
C1
IR SENSOR
2
1
3
Vcc
Vout
GND
MT1
.1UF
C2
1K
R45
3.3V
22.1K
R29
22.1K
R30
22.1K
R28
22.1K
R34
3.3V BU
J9:18
J9:15
J9:12
J9:16
J9:17
J9:13
J9:10
J9:11
J9:14
J9:9
J9:6
J9:3
J9:4
J9:5
J9:7
J9:1
J9:8
J9:2
INPUT_A
INPUT_B
LEFT PB AD
VFD 5V
VFD SCL
VFD SDA
VFD CE
VFD CE
FRONT_IR
I2C_SCL
I2C_SDA
VFD 5V
VFD SDA
VFD SCL
.1UF
C6
3.3V
.1UF
C7
3.3V
3.3V BU
BYPASS
PROC
DS23
DS24
DS18
STANDBY/ON
ADC-VREF-L
3.3V
VFD 5V
TRIM
DS17
133724
TI SN74LVC1G132DBVT
1
2
4
5
3
VCC
GND
U4
133724
1
2
4
5
3
VCC
GND
U5
SELECTOR
INPUT
5V
GND
6
B
1
C
4
A
5
GND
7
S1
146261
150
R17
ILLUMINATION
FRONT PANEL
DS6
DS3
DS4
3
1
2
Q1
150
R14
150
R19
DS2
2.21K
R16
DS5
150
R15
150
R20
PANEL_LAMP
22.1
R215
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
U30
22.1K
R202
22.1K
R201
22.1K
R210
22.1K
R209
3.3V BU
22.1
R211
22.1
R212
22.1K
R203
22.1K
R204
22.1
R217
22.1
R219
1 K
R220
1K
R213
1K
R214
1K
R216
1K
R218
Address=3
.1UF
C80
OFF
ON
OFF
ON
OFF
ON
OFF
ON
3.3V BU
I2C_SDA
I2C_SCL
5V
DS7
150
R2
DS8
150
R1
DS9
OUT1
DS10
OUT2
3.3V
3.3V
3.3V
3.3V 3.3V
PANEL_LAMP
3.3V BU
.1UFC66
4
2
1
3
5
Vcc
GND
U25
47uF
C18
.1UF
C19
100uH
L1
47uF
C23
VOL-B
VOL-A
OFF
ON
22.1
R69
22.1
R70
SDA (SI/SO)
CE (STB)
SCL (SCK)
J1:8
J1:3
J1:9 J1:5
J1:6
J1:4 J1:1 J1:7 J1:2
Daughter PCB
J12:12
J12:11
J12:10J12:9
J12:8
J12:7
J12:6J12:5
J12:4J12:3
J12:2J12:1
J11:12
J11:11
J11:10
J11:9
J11:8 J11:7
J11:6 J11:5
J11:4 J11:3
J11:2 J11:1
B
A
179
4 6
12
Ground
J13:4
J13:3
J13:2
J13:1
CONTROL
VOLUME
EQ BYPASS
To Meter Driver page
METER LEDs ON
METER MUTE
.1UF
C8
3.3V
133724
1
2
4
5
3
VCC
GND
U6
3.3V BU
.1UFC9
4
2
1
3 5
Vcc
GND
U7
22.1
R8
J7:1
J7:2
J7:3
J7:4
J7:5
J7:6
J7:7
J7:8
J7:9
J7:10
J7:11
J7:12
3.3V BU
VOL-B
ON/RESET
5V
5V
ADC-VREF-R
RIGHT PB AD
VOL-A
3.3V
FRONT_IR
SP1
-15V
15V
(MONO)
TO CONTROL PCB
D15
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3.3V
3.3V
0V
0V
0V
0V
0V
3.3V
0V
3.3V 3.3V 0V
0V
.2V
.77V 3.3V
3.3V
1
1
1
1
2
2
2
2
2
2
J2:1
J2:2
J2:3
J2:4
J2:5
J2:6
J2:7
J2:8
J2:9
J2:10
J2:11
J2:12
J2:13
J2:14
J2:15
J2:16
J2:17
J2:18
J5:1
J5:2
J5:3
J5:4
J5:5
J5:6
J5:7
J5:8
J5:9
J5:10
J5:11
J5:12
DS1