Cyrus 8 DAC - Page 50

Power supplies, connectors and headphone amp
C906
22n
DGND
L901
100uH
C922
100nF
+3V3_DIR
+3V3_DAC
C914
22n
C913
22n
DGND
I/P
3
O/P
2
G
1
VR901
LM1117MPX-3.3
DGND
C917
47uF/16V
RP903
100R * 4
RP904
100R * 4
Connection to front panel PCB
DGND
CON901
13Way LIF 1mm
+5V_MCU
C901
22n
DGND
CON903
SIL_12W
Connection to Main PCB
CON902
DGND
AGND
SDATA
LRCLK
BCLK
MCK02
/SUB_RESET
/MUTE
+15V_AN
-15V_AN
C902
22n
C903
22n
C904
22n
C905
22n
+15V_AN
-15V_AN
AGND
AGND
DGND
CON904
SIL_3W
AGND
DAC_LEFT DAC_RIGHT
DGND
To Qx DAC
+5V_OUT
PHONES_R
AGND
PHONES_L
PH-MUTE
4 8 3
REF
5 2 1
VDD
6
GND
7
IC901
TPA152
C920
47uF/16V
C921
47uF/16V
AGND
C926
47uF/16V
C927
47uF/16V
L
R
G
SK901A
1503 09
C928
470uF/16V
C929
470uF/16V
R911
1k5
R910
1k5
AGND
PHONES_IN
R907
10k
R905
33k
R906
33k
R909
8k2
R908
8k2
+15V_AN
-15V_AN
AGND
PHONES_R PHONES_L
+LV
+5V_OUT
DGND
PHONES_IN PH-MUTE
+5V_OUT
I/P
O/P
G
VR902
LM1117DTX-5.0
+15V_AN
+LV
+5V_OUT
-15V_AN
C909
22n
C910
22n
C911
22n
C912
22n
DGND
AGND
AGND
AGND
C919
47uF/16V
C915
22n
C916
22n
PSUGND
+5V_DAC
USB_CS
SPI_CLK
SPI_DATA_IN
VBUS_uProc
C907
22n
DAC_CS
/SUB_RESET
SPDIF_CS
SPI_DATA_OUT
RP901
10k * 4
RP902
10k * 4
+3V3_DAC
DGND
CON905
SIL_3W
SL
SR
SK901B
1503 09
R912
10k
+5VCC +5V_DAC
R903
47k
+5V_DAC
45mA
116mA
CON906
SIL_2W
To transformer LV winding
C930
4700uF/16V
+LV
PSUGND
PSUGND
+LV +LV
C908
22n
PSUGND
L902
100uH
C923
100nF
+5V_OUT
+5VCC
C931
22n
C932
22n
DGND
I/P
3
O/P
2
G
1
VR903
LM1117DTX-5.0
DGND
C933
47uF/16V
+LV
PSUGND
AC1 AC2
+ -
D901
DF04S
DAC_GND
8V0
30mA
0.15W= 13deg rise @95deg/W H/S
0.35W= 24.5deg rise @70deg/W H/S
85mA
116mA
1mA
100mA
10mA normal
85mA Qx fitted
10mA normal
85mA Qx fitted
Parking for audio conn
when Qx DAC used
FS901
396/TE5 1A
REPLACE WITH APPROVED PART
SAFETY CRITICAL COMPONENT
!
! !
!
R904
47k
PORT-AN2
DGND
Sub PCB schematic diagram
Cyrus 6 DAC, Cyrus 8 DAC amplifier service manual Issue 1© Cyrus Audio Ltd Jun 2014
48