McIntosh C2500 Service Manual

47
48
6
DIGITAL AUDIO
751120 SCH 1 of 3
USB
47.5
R184
Connector
Type "B"
(Square)
CASE
6
GND
4
D-
2
D+
3
CASE
5
PWR
1
USB
J1
1.5K
R3
BRKT1
.1uF
C2
133754
INTERSIL ISL54222AIUZ-T
HSD2+
3
D+
4
D-
6
GND
5
SEL
1
HSD1-
8
HSD1+
2
HSD2-
7
OE
9
VDD
10
U3
133755
ATMEL AT32UCA3256
PX09
49
GNDPL L
144
PX38
51
PA07
133
PX06
53
PX07
54
VDDCO RE
141
VDDIN
142
PX59
56
PA08
137
PX05
58
PX01
59
PA11
136
PA04
126
PA03
125
PX02
62
PX03
63
PA00
122
PA01
123
GNDIO
65
PA26
120
PX11
67
PX14
68
GNDAN A
117
VDDAN A
118
GNDIO
47
PX35
38
PX16
32
PB00
30
PB01
27
PA28
28
PB02
25
PB04
22
PA29
23
PX42
69
PX41
71
PX22
72
PX20
73
PX57
76
PX56
78
PX55
79
VDDIO
81
PX17
83
PX18
84
PX24
86
PX27
89
PX43
88
PX25
92
PX28
91
PX29
94
PX31
97
PC00
98
PA14
100
GNDIO
102
VDDIO
103
PA21
109
TDO
105
RESET_N
106
PA10
138
PB06
134
GNDIO
131
PA16
128
PA17
116
PA23
111
PA22
110
PA20
113
PA19
114
PX47
39
PB11
31
PB03
24
PA27
26
PA31
29
PX45
70
PX46
74
PX50
75
PX51
77
PX21
80
GNDIO
82
PX23
85
PX52
87
PX26
90
PX32
93
PX33
95
PX30
96
PC01
99
PA15
101
TMS
104
TCK
107
PA09
139
PB07
135
VDDIO
130
PA06
127
TD1
108
PA24
112
PA18
115
VDDIO
48
PX08
50
PX39
52
PX00
55
GNDCO RE
140
PA12
132
ONREG
143
PX58
57
PX04
60
PX34
61
VDDIO
64
PB05
121
PA05
124
PA13
129
PX44
66
PA25
119
PX37
45
PX53
42
PX49
43
PX15
40
PX19
35
PX40
36
PX13
33
GNDIO
20
PB09
17
PC02
18
PA02
15
PC05
12
PC04
13
VDDIO
10
GNDIO
7
DMFS
8
DMHS
5
VDDIO
2
USB_VBIAS
3
PX48
41
PX36
44
PX54
46
PX12
34
PX10
37
VDDIO
21
PB08
11
PA30
14
PB10
16
PC03
19
USB_VBUS
1
GNDIO
4
DPHS
6
DPFS
9
U7
Audio_USB-
Audio_USB+
Control_USB-
Control_USB+
DGND
.1uFC68
3.3V BU
3.3V BU
Cont
USB
D2
D3
USB-SW-SEL
USB-SW-OE/
USB-I2S-LRCLK
USB-I2 S-SCLK
USB-I2S-SDATA
Audio_USB-
Audio_USB+
BRKT2
SP1
SSC_Rx_CLK
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
.01uFC73
VDDIN
.1uFC154
4.7uF
C58
VDDIO
.01uFC59
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
Pin 142
Pin 21
Pin 103
Pin 130
Pin 2
Pin 81
Pin 48
Pin 64
VDDIO
Pin 10
VDDANA
Pin 118
.01uFC55
.01uF
C83
.01uFC71
.01uF
C75
.01uF
C77
.01uF
C80
.01uF
C82
.01uF
C85
.1uF
C74
.1uF
C70
.1uF
C76
.1uF
C78
.1uF
C79
.1uF
C81
.1uF
C84
.1uF
C86
.1uF
C72
4.7uF
C87
VDDAN A
OPENR1
VDDCO RE
VDDIN
1.5K
R81
Attached
Detached
Use "USB-SW-OE/" for D+ Enumeration
3.3V BU
3.3V
L9
6.81K
R44
12pF
C91
.1uFC90
10K
R12
S1
VDDIO
Reset
33R45
33R56
VDDIN
J7:1 J7:2
J7:3 J7:4
J7:5 J7:6
J7:7
J7:8
J7:9
J7:10
TDI
TDK
TDI
TDK
TDO
TMS
TDO
TMS
RESET_N
RESET_N
RESET_N
3.3V
EVTO
UC3A3 JTAG Interface
.1uF
C92
USB-I2S-SCLK
USB-I2S-SDATA
USB-I2S-LRCLK
J8:1
J8:2
J8:3
J8:4
UC3A3 I2S Test Port
I/O and Control lines
DA AUDIO MUTE
SDA
SCL
SDA
SCL
J9:1
J9:2
J9:3
J9:4
VDDIO
10K
R84
10K
R85
VDDIO
UC3A3 I2C TWI Test Port
SPDIF_RESET
I2S_SEL
CONV BYPASS
CONV RESET/
180089
GND
2
E/D
1
OUT
3
VDD
4
Y1
OPEN
R93
12
L11
.1uF C96
3.3V
OSC1-12MHz
22.1
R96
100K
R99
LED0
LED1
LED2
LED3
10K
R102
10K
R103
10K
R104
10K
R105
PX16
PX50
PX54
PX51
3.3V
3.3V
3.3V
3.3V
J11:1
J11:2
J11:3
J11:4
J11:5
J11:6
J11:7
J11:8
3
3
3
3
3
3
3
3
TO CO NTR OL PC B
J11:9
J11:10
J11:12
J11:11
J11:6
J11:7
J11:9
J11:10
J11:11
J11:8
J11:5
J11:12
J11:1
-15V
15V
5VD
3.3V
J11:2
J11:3
J11:4
USART3_RXD
L7
.1uF
C61
22.1R72
22.1
R76
47.5K
R77
3.3V
VOUT
3
GND
2
VIN
1
TAB
4
U5
2.5V
80mA Max
USB Sample Rate Converter
3.3V
.1uF
C102
.1uF
C103
4.7uF
C101
2.5V
USART3_RXD
USART 3_TXD
Test LED's
PX16
PX50
PX54
PX51
RESET_N
<-- DAC_TXD
DAC_RXD -->
USART3_TXD
J12:1
J12:2
J12:3
J12:4
J12:5
J12:6
J12:7
J12:8
3
3
3
3
3
3
3
3
TO CO NTROL PC B
J12:9
J12:10
J12:12
J12:11
J12:6
J12:7
J12:9
J12:10
J12:11
J12:8
J12:5
J12:12
J12:1
5V
3.3V
J12:2
J12:3
J12:4
3.3V BU
Control_USB+
Control_USB-
DA RESET/
USB-SW-SEL
USB-SW-OE/
USBUS ERID
Not Use d
e B.jpg
SPIO_S CK
Not Use d
SPIO_M ISO
SPIO_M OSI
Not Use d
Not Use d
SPIO_SCK
Not Used
SPIO_MISO
SPIO_MOSI
Not Used
Not Used
USBUSERID
Not Used
SPIO_CS3
SPIO_CS3
Not Used
LED0
LED2
LED1
LED3
GPIO-M 1
GPIO-M 2
GPIO-M3
GPIO-M4
GPIO-M 5
GPIO-M 6
GPIO-M 7
GPIO-M 8
GPIO-M1
GPIO-M2
GPIO-M3
GPIO-M4
GPIO-M5
GPIO-M6
GPIO-M7
GPIO-M8
22.1R118
22.1
R119
22.1
R120
22.1
R122
22.1
R123
GPIO-S1
GPIO-S2
GPIO-S3
GPIO-S4
GPIO-S5
GPIO-S8
22.1R124
22.1
R128
SDA
SCL
GPIO-S 1 GPIO-S 2 GPIO-S 3 GPIO-S 4 GPIO-S 5
GPIO-S8
Not Used
SP4
SP5
SP6
CLK_OUT
3
AUX_OUT
4
XTO
6
TST_IN
5
VD
1
AD0/CS
8
GND
2
XTI/REF_CLK
7
SCL/CCLK
9
SDA/CDIN
10
U1
PC0
OSC1-12MHz
PC1
PC2
PC3
PC4
PC5
PC2
PC4
Variable CLK
12MHz CLK
SDA
SCL
DGND
OPEN
R177
Attached
Detached
Control PCB
USB PCB
Reset
USB Audio
Run
6
6
6
3
3
3
3
3
3
3
3
6
6
6
6
6
6
6
6
6
6
6
6
6
6
VDDCORE
.1uFC62
4.7uF
C63
Pin 141
.01uFC60
USB_VBUS
CONV UNLOCKED
USART2_RXD
USART2_TXD
USART2_RXD
USART2_TXD
SP7
SP8
SP9
Development Diag Port
Unmuted
Muted
Unlocked
Good Signal
DA Run
DA Reset
Conv Run
Conv Reset
SPDIF Run
SPDIF Reset
Bypass
Convert
USB I2S
SPDIF I2S
.1uF
C56
10KR18 0
S2
VDDIO
DFU
DFU
VDDIO
0
R183
47.5
R185
M6
Spare
3.3V

McIntosh C2500 Specifications

General

Total Harmonic Distortion	0.08%
Signal to Noise Ratio	100dB
Rated Output Voltage	2.5V unbalanced, 5V balanced
Maximum Output Voltage	8V unbalanced, 16V balanced
High Level Voltage Gain	15dB
Type	Vacuum Tube Preamplifier
Inputs	6 unbalanced, 2 balanced, 1 phono MC, 1 phono MM
Outputs	3 unbalanced, 2 balanced
Weight	29 lbs (13.2 kg)
Input Impedance	47k ohms
Phono Voltage Gain	40dB (MM), 60dB (MC)
Frequency Response	+0, -0.5dB from 20Hz to 20, 000Hz +0, -3dB from 10Hz to 100, 000Hz