McIntosh C2500 Service Manual page 27

6 DIGITAL AUDIO
751120 SCH 2 of 3
J5:2
DIGITAL 4
4
5
J5-2
6
J6:2
DIGITAL 3
4
J6-2 5
6
J5:1
DIGITAL 2
R43 47.5
1
5V
J5-1 3 R78 1K
2
J6:1
DIGITAL 1
47.5
1 R50
5V
J6-1 R29 1K
3
SPDIF Run
2
SPDIF Reset
SPDIF_RESET
Optical connector conforms to JEITA standard EIAJ RC-5720 . Data rates up to 15Mb/s
(192kHz*32 = 12.288Mb/s)
C2500
TUBE PREAMPLIFIER
L4
3.3uH
C24 .01uF
U15
C25 .01uF
DIG 4:COAXIAL 1 28
RXP3 OLRCK
DIG 3:COAXIAL 2 27
RXP2 OSCLK
C31 .01uF DIG 2:OPTICAL 3 26
RXP1 SDOUT
DIG 1:OPTICAL 4 25
RXP0 OMCK
5 24
RXN RMCK
C64 .01uF 6 23
VA VD
7 22
AGND DGND
C65 .01uF
8 21
FILT VL
9 20
RST GPO0
10 19
RXP4 GPO1
C42 1000pF
11 18
RXP5 AD2/GPO2
12 17
RXP6 SDA/CDOUT
.022uF
R49 13 16
RXP7 SCL/CCLK
R111
14 15
3.32K
AD0/CS AD1/CDIN
C32
22.1
.01uF
C43
192kHz Digital Audio Interface Reciever
.01uF
C44
C45 .01uF
C46 .01uF
49
3.3V
C93
R31 47.5 LRCLK .1uF
USB I2S
SPDIF I2S
R33 47.5 SCLK
R71 47.5 SDOUT
1
I2S_SEL A/B Vcc
2
1A G
R74 47.5
3
NC
USB-I2S-LRCLK 1B 4A
SP10
4
1Y 4B
5
2A 4Y
R75 47.5
6
USB-I2S-SCLK 2B 3A
7
2Y 3B
8
GND 3Y
47.5K
R112
U37
R113
22.1
I2S SPDIF/USB Switch
SDA
R114 22.1
SCL
R115 22.1
C99 .1uF
2.5V
IC CONVERTER SAMPLE RATE SMD
U100
3.3V R86 47.5K
1
XTO SRC_UNLOCK
R175 22.1
16 2
SYS-CLK XTI SAIF
15 3
VD SAOF
14 4
Conv Run
GND VL
Conv Reset
13 5
CONV RESET/ RST GND
12 6
CONV BYPASS
BYPASS MS_SEL
Bypass
11 7
Convert
ILRCK OLRCK
10 8
USB-I2S-SDATA ISCLK OSCLK
9 R82 47.5 9
SDIN SDOUT
10
MCLK_OUT TDM_IN
50
L10
3.3V
C153 .1uF
Unlocked
Good Signal
20
CONV UNLOCKED
R88 1K
19
R89 4.75K R106 3.32K
18
17
R107 3.92K
16
R108 3.92K
15
14
PLRCK
13
PBCK To D/A IC
12
PDATA
11
Pin 19 SAIF; Input: I2S up to 32-Bit
Pin 18 SAOF; Output: I2S 32-Bit Data
Pin 15 MS_SEL; Input Slave, Output Master