How it Works
Classe Audio
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SSP-25
Owners manual
56 pgs3.1 Mb2
Schematic
23 pgs826.8 Kb0

Classe Audio SSP-25 Schematic

D:\CLASSE\HW\VER30\MOTHER~1\DESIGN~1\MOTHER.PRJ
SSP-25 Motherboard
Classe Audio Inc
Classe Audio Inc
SVHS switching
SVHS inputs SVHS
SVHS Switching
svhs.sch
Audio inputs
Listening selector
DSP and Bypass
Volume control
Bypass relay
Output buffersOutbuf.sch
Buffers
TAPE output
Balanced output
digin.sch
Digital inputs
Dig. conn.
Power supply
POWER IN
powers.sch
Analog input connector
inputbuf.sch
RF-demodulator module
Power supply
Digital input selection
+5D Standby +5D switched Digital ground
+15V analog
-15V analog +5V analog
-5V analog Analog ground
Microcontroller
micro.sch
DSP MODULE
Analog audio in
Digital audio in
DSP SPI
Microcontroller
5.1 ch.
audio out
dsp.sch
Interface
Remote in
interfac.sch
I/O interface
Bus interface
BUFFER
BUFFER
Remote out
Frontp.
Display
RS232
R L Rs Ls C SUB
D25
5.1ch output
Title:
Project:
MB block diagram
Sample Rate Systems Oy Finlaysoninkatu 2 33210 Tampere, Finland
tel. + 358 3 254 2000 fax + 358 3 254 2030
Sheet: 1 of 9 , revision 3.0
2-Dec-1998 Printed:
File:
Copyright © Sample Rate Systems Oy 1994 - 1997
, drawn by Tero
SPDIF RECEIVER & RF DEMODULATOR & SWITCHING
Classe Audio Inc
Classe Audio Inc
DIGITAL CONNECTOR
COX_DIGITAL1 COX_DIGITAL2 COX_DIGITAL3 COX_DIGITAL4 COX_DIGITAL5 COX_DIGITAL6 COX_DIGITAL7
1 2 3 4 5 6 7 8 9 10
11 12
15 16
OPTICAL_IN
X15 16Pin IDC PCB mounting header
+5D
SEL_VIDEO_0 SEL_VIDEO_1 SEL_VIDEO_2 SEL_VIDEO_3
OPTIONAL_RF
1413
COX_DIGITAL3
-5A
COX_DIGITAL6
+5D
R85 10k
COX_DIGITAL4
+5D
R86 10k
OPTIONAL_RF
AC3_OK
COX_DIGITAL1 COX_DIGITAL2
COX_DIGITAL5
COX_DIGITAL7
RF_RESET
2 1
3
6 7
+5D
+5D
5
R70
4
10k
12
R68
IC19
10k
26LS32DIP
2 1
3
6 7
5
4
R69
12
10k
IC18
R67
26LS32DIP
10k
+5A
+5D
16
Input A+ Input A-
Output A
Input C+ Input C-
Output C
3-State Control
3-State Control
+5D
16
Input A+ Input A-
Output A
Input C+ Input C-
Output C
3-State Control
3-State Control
11
12
8
Vcc
8
Vcc
MODULE2
1
+5 V +5 V
RF in
S/PDIF out
/AC-3 OK
LED+
/reset14S/PDIF-
S/PDIF+
14 15
13
10 9
11
14 15
13
10 9
11
-5 V
-5 V
GND GND GND GND GND
3
8
RF DEMODULATOR VER. 3.X
GND
Input B+
Input B-
Output B
Input D+ Input D-
Output D
GND
Input B+
Input B-
Output B
Input D+ Input D-
Output D
2 4
5 6 7 9 10 13 15 16
R83
RF_INSTALLED
1k
+5D
16
VCC
R75
5
Z
Z
GND
VCC
Z
Z
GND
100
6
8
SPDIF_IN
+5D
16
R74
5
100
6
8
C62 100nF
OPTICAL_IN
SPDIF_SEL_0 SPDIF_SEL_1 SPDIF_SEL_2
SPDIF_SEL_BANK_0
SPDIF_SEL_0 SPDIF_SEL_1 SPDIF_SEL_2
SPDIF_SEL_BANK_1
IC22
11
S0
10
S1
9
S2
7
E
4
I0
3
I1
2
I2
1
I3
15
I4
14
I5
13
I6
12
I7
74HCT251
IC21
11
S0
10
S1
9
S2
7
E
4
I0
3
I1
2
I2
1
I3
15
I4
14
I5
13
I6
12
I7
74HCT251
+5D
X14
1 2 3
Not installed
+5D
C106
100nF
C100
100nF
C101
100nF
C107
100nF
Title:
Project:
Digital inputs
Sample Rate Systems Oy Finlaysoninkatu 2 33210 Tampere, Finland
tel. + 358 3 254 2000 fax + 358 3 254 2030
Sheet: 3 of 9 , revision 3.0
2-Dec-1998 Printed:
File: D:\CLASSE\HW\VER30\MOTHER~1\DESIGN~1\DIGIN.SCH
, drawn by Tero
Copyright © Sample Rate Systems Oy 1994 - 1997
LISTENING_L
Classe Audio Inc
Classe Audio Inc
LISTENING_R
-5A +5A
-15A
D15 4V3
D13 4V3
C60
10uF
C81
10uF
CS3310_MUTE
AUDIO_SPI_SCK AUDIO_SPI_MOSI
SEL_BP_VOL
R63 100k
R57 100k
16 15
9
10
8
6
2
2
3
6
5
1
IC11A OPA2134
8 4
+15A
7
IC11B OPA2134
D6 4V3
D8 4V3
100nF
C68
C70 100nF C69
C79 10uF
13
IC10
VA-
AINL AGNDL
AINR AGNDR
MUTE
SCLK SDATAI3SDATAO CS
CS3310
12
C78 10uF
VA+
ZCEN
AOUTL
AOUTR
DGND
VD+
100nF
C80 10uF
R56
10
C65 100nF
4 1
14
11
7
5
R53
10k
R64
10k
2
3
6
5
C59 22p
-15A
R55
39K
1
IC9A OPA2134
8 4
C76 22p
+15A
R61
39K
7
IC9B OPA2134
LISTENING_L
LISTENING_R
R58
100k
R62
100k
MODULE1B
A2
AGND
A4
C61 10p
-15A
R54
100k
2
3
1
IC12A OPA2134
8 4
C77 10p
+15A
AGND
A5
AGND AGNDA6left Surr. Out AGNDA8Right Surr. Out
A10
AGND
A12
AGND
A14
AGND
A15
AGND
A16
AGND
A18
AGND
A20
AGND
THX THEATER
left Out
Right Out
Center Out
Subwoofer Out
Left In
Right In
A1
DSP_L
A3
DSP_R 13
A7 A9
A11 A13
A17 A19
DSP_SRND_LEFT
DSP_SRND_RIGHT
DSP_CENTER
DSP_SUBWOOFER
SEL_BYPASS
+5D
2 3
1
R60
1k
Q4 BC182LB
11
9 6
8
RE7 MCS2H-S
D11
1N4148
C75 100nF
RELAY_OUT_L
4
116
RELAY_OUT_R
R65
100k
6
5
IC12B OPA2134
7
D9 4V3
D10 4V3
D14 4V3
DSP_SPI_MISO DSP_SPI_SCK
D12
DSP_SPI_MOSI
4V3
SEL_DSP
SPDIF_IN
DSP_MUTE DSP_RESET
MODULE1A
D1 D2 D3 D5 D7
D19
D15 D11
THX THEATER
SPI-Dout SPI-SCK SPI-Din SPI-/Sel SPI-/HREQ
SPDIF In
/mute /reset
DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND
+5STDBY
MODULE1C
P1 P2
P3 P4
P11 P12 P17 P18 P19 P20
THX THEATER
+5 Dig. +5 Dig.
DGND DGND
AGND AGND AGND AGND AGND AGND
+15 An. +15 An.
-15 An.
-15 An.
+5 An. +5 An.
-5 An.
-5 An.
P15
+15A
P16
P13 P14
-15A
P9
+5A
P10
P7 P8
-5A
P6
n.c.
P5
n.c.
+15A
C72
C74 100nF
C66 100nF
C67 100nF
C73 100nF
100nF
C71 100nF
-15A
D4 D6 D8 D9 D10 D12 D13 D14 D16 D17 D18 D20
Title:
Project:
DSP & Bypass
Sample Rate Systems Oy Finlaysoninkatu 2 33210 Tampere, Finland
tel. + 358 3 254 2000 fax + 358 3 254 2030
Sheet: 3 of 9 , revision 3.0
2-Dec-1998 Printed:
File: D:\CLASSE\HW\VER30\MOTHER~1\DESIGN~1\DSP.SCH
, drawn by Tero
Copyright © Sample Rate Systems Oy 1994 - 1997
D:\CLASSE\HW\VER30\MOTHER~1\DESIGN~1\OUTBUF.SCH
RELAY_OUT_L
Classe Audio Inc
Classe Audio Inc
RELAY_OUT_R
DSP_SRND_LEFT
DSP_SRND_RIGHT
DSP_CENTER
DSP_SUBWOOFER
C50
100uF
C49
100uF
C36
100uF
C35
100uF
C22
100uF
C21
100uF
MUTE_MAIN_RELAY
MUTE_MAIN_RELAY
MUTE_MAIN_RELAY
C28 68p
-15A
R42
56R
11
9 6
8
LEFT_OUT
13
RE5 MCS2H-S
4
116
LISTENING_L
R40
10k
D5 1N4148
R41
56R
C43 100nF
RIGHT_OUT
LISTENING_R
R45
10k
R39
20k
2
3
8 4
+15A
IC6A OPA2134
R37
1
56R
C57 68p
R44
20k
6
5
IC6B OPA2134
R46
7
56R
C63
100uF
MUTE_TAPE_RELAY
C64
100uF
R50 100k
R51 100k
11
9 6
8
D7 1N4148
C58 100nF
TAPE_LEFT_OUT
13
RE6 MCS2H-S
4
116
TAPE_RIGHT_OUT
LEFT_OUT
RIGHT_OUT
X8 Red/White
1 2
3 4
C4
10nF
+15A
IC8
6
R33
56R
11
9 6
8
13
4
116
LSURROUND_OUT
RE4 MCS2H-S
LEFT_OUT
C40 100uF
4
R18 10k
3
D4 1N4148
R32
56R
R16
56R
R15
56R
C32 100nF
11
9 6
8
D1 1N4148
C19 100nF
13
4
116
RSURROUND_OUT
CENTER_OUT
RE1 MCS2H-S
SUBWOOFER_OUT
RIGHT_OUT
Bypass capacitors
+15A
C18 10uF
C17 10uF
-15A
C45 100nF
C44 100nF
C33 100uF
4
C54 not installed
C53 not installed
3
R17 10k
V+
SENSE+
Vin
gnd
SENSE-
V-
5
-15A
+15A
6
V+
SENSE+
Vin
gnd
SENSE-
V-
5
-15A
C39 not installed
C37 not installed
8 Pin socket installed
7
FORCE+
FORCE-
2
IC5 8 Pin socket installed
7
FORCE+
FORCE-
2
C52
8
100uF C55
1
100uF
R20 10k
C41
8
100uF C34
1
100uF
R23 10k
R19 10k
R22 10k
BAL_OUT_L_+
BAL_OUT_L_-
MUTE_BAL_RELAY
BAL_OUT_R_+
BAL_OUT_R_-
MUTE_BAL_RELAY
11
9 6
8
D3 1N4148
C24 100nF
11
9 6
8
D2 1N4148
C23 100nF
13
RE2 MCS2H-S
4
116
13
RE3 MCS2H-S
4
116
PREOUT
RSURROUND_OUT
LSURROUND_OUT SUBWOOFER_OUT RIGHT_OUT
CENTER_OUT LEFT_OUT
11421531641751861972082192210231124122513
X11 25 Pin 90deg PCB mount with boardlocks
+5D
R13
0R
R14 100
26
SHIELD
LSURROUND_OUT
RSURROUND_OUT
CENTER_OUT
SUBWOOFER_OUT
TAPE_LEFT_OUT
TAPE_RIGHT_OUT
BAL_OUT_L_+
BAL_OUT_L_-
SHIELD
BAL_OUT_R_+
BAL_OUT_R_-
SHIELD
5 6
7 8
X7 Red/White
1 2
3 4
5 6
7 8
1 2
3
4
1 2
3
4
C2
10nF
C1
10nF
C3
10nF
X9
Neutrik NC3MAH
X10
Neutrik NC3MAH
SHIELD
Title:
Project:
Output buffers
Sample Rate Systems Oy Finlaysoninkatu2 33210 Tampere, Finland
tel. + 358 3 254 2000 fax + 358 3 254 2030
Sheet: 4 of 9 , revision 3.0
2-Dec-1998 Printed:
File:
, drawn by Tero
Copyright © Sample Rate Systems Oy 1994 - 1997
Classe Audio Inc
Classe Audio Inc
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15
FLASH_SEL_STORE
M_BUS
SRAM_CE SRAM_OE
R/W A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14
FLASH_CE FLASH_OE FLASH_R/W
IC30 TC55257DPI
M_BUS
20 22 27
10
9 8 7 6 5 4
3 25 24 21 23
2 26
1
IC34 AM29F010 (Installed on socket)
22
CE
VCC
24
OE
31
WE
12
A0
DQ0
11
A1
DQ1
10
A2
DQ2
9
A3
DQ3
8
A4
DQ4
7
A5
DQ5
6
A6
DQ6
5
A7
DQ7
27
A8
26
A9
23
A10
25
A11
4
A12
28
A13
29
A14
3
A15
2
A16
30
A17
R66
1
GND
A18
10k
RESET_MYSELF
+5STDBY
CE OE WE
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14
28
VCC
AD0
11
DQ0
AD1
12
DQ1
AD2
13
DQ2
AD3
15
DQ3
AD4
16
DQ4
AD5
17
DQ5
AD6
18
DQ6
AD7
19
DQ7
14
GND
+5STDBY
32
13 14 15 17 18 19 20 21
16
AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7
+5STDBY
M_BUS
R81 10k
C122 100nF
M_BUS
Q5 BC182LB
1
C115 100nF
1
23
C114 100nF
J3
Not installed
2
+5STDBY
R82 330
+5STDBY
C121 10nF
J2
Not installed
J1
1
1
2
TP21
Scopehook (not installed)
IC29
1
VCC
RESET
3
DGND
DS1233
+POWER_GOOD
R78 3k
C113
R77
1uF
2k
C119
C129
100nF
100nF
+5STDBY
2pin 100mil pin strip
R87
2
10k
2
+5STDBY
84
IC26A LM393
3
2
C117
C110
100nF
100nF
SPI BUFFER
IC25 74HC244
DSP_SPI_MISO
IO_ENABLE
+5STDBY
C116
C118
100uF
100nF
R88
R89
10k
10k
52
Vrh
51
Vrl
50
PE7/AN7
48
PE6/AN6
46
PE5/AN5
44
PE4/AN4
49
PE3/AN3
47
E R/W A11 A12 A13 A14 A15
45 43
17 18 19
PE2/AN2 PE1/AN1 PE0/AN0
RESET XIRQ IRQ
IO_ENABLE
RF_INSTALLED
AC3_OK
+5STDBY
R79 10k
R76 10k
1
C109 10nF
+5STDBY
R80
R90
10k
10k
1
26
3
2
Vss
Vdd
MODA/LIR
MODB/Vstby
IC32 MC68HC11E0 (Installed on socket)
EXTAL7XTAL
8
R93
1M XTAL1
+5STDBY
8MHz C128
C127
22p
22p
IC24 PAL16L8BCN (Installed on socket)
1
CLK/I0
2
I1
3
I2
4
I3
5
I4
6
I5
7
I6
8
I7
9
I8
OE/I911GND
25
24
PD5/SS
R72 10k
23
PD4/SCK
PD3/MOSI
VCC
I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7
21
22
PD2/MISO
PA6/OC2/OC1
PA7/PAI/OC1
29
28
27
PD0/RxD20PD1/TxD
PA4/OC4/OC1
PA5/OC3/OC1
31
30
+5STDBY
20
12 13 14 15 16 17 18 19
10
6
4E5
STRA/AS
STRB/R/W
IO_SEL SRAM_OE SRAM_CE FLASH_OE FLASH_CE FLASH_R/W
TxD RxD
EASR/W
PC0/A0/D0 PC1/A1/D1 PC2/A2/D2 PC3/A3/D3 PC4/A4/D4 PC5/A5/D5 PC6/A6/D6 PC7/A7/D7
PB0/A8
PB1/A9 PB2/A10 PB3/A11 PB4/A12 PB5/A13 PB6/A14 PB7/A15
PA0/IC334PA1/IC233PA2/IC132PA3/OC5/OC1
REMOTE_CONTROL
VOL_ROT_0
VOL_ROT_1
KBD_SCAN
SEL_DATA_LATCH
SWITCHED_POWER_ON
RESET_MYSELF
EN_LATCHES
EN_DSP_SPI
EN_AUDIO_SPI
9
AD0
10
AD1
11
AD2
12
AD3
13
AD4
14
AD5
15
AD6
16
AD7
42
A8
41
A9
40
A10
39
A11
38
A12
37
A13
36
A14
35
A15
1
19
R84 10k
IC31 74HC573
1
11
AS
2
AD0
3
AD1
4
AD2
5
AD3
6
AD4
7
AD5
8
AD6
9
AD7
A0 A1 A2
R/W
IO_SEL
Address decoding
+5STDBY
20
VCC
1A121Y1 1A241Y2 1A361Y3 1A481Y4
2A1172Y1 2A2152Y2 2A3132Y3 2A4112Y4
1G 2G
OE CLK
1D 2D 3D 4D 5D 6D 7D 8D
18 16 14 12
3 5 7 9
10
GND
+5STDBY
20
VCC
19
1Q
18
2Q
17
3Q
16
4Q
15
5Q
14
6Q
13
7Q
12
8Q
10
GND
IC33 74AC138
1
A0
2
A1
3
A2
4
E1
5
E2
6
E3
Title:
Project:
Microcontroller
Sample Rate Systems Oy Finlaysoninkatu 2 33210 Tampere, Finland
tel. + 358 3 254 2000 fax + 358 3 254 2030
Vcc
GND
A0 A1 A2 A3 A4 A5 A6 A7
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
DSP_SPI_MOSI DSP_SPI_SCK
AUDIO_SPI_MOSI AUDIO_SPI_SCK
M_BUS
+5STDBY
16
15
KBD_LE_0
14
FREE_1
13
LED_LE_0
12
LED_LE_1
11
EN_CTLR0
10
EN_CTLR1
9
EN_CTLR2
7
8
IC35D
11
12
13
LCD_E
74HC02
Sheet: 5 of 9 , revision 3.0
2-Dec-1998 Printed:
File: D:\CLASSE\HW\VER30\MOTHER~1\DESIGN~1\MICRO.SCH
, drawn by Tero
Copyright © Sample Rate Systems Oy 1994 - 1997
D:\CLASSE\HW\VER30\MOTHER~1\DESIGN~1\INTERFAC.SCH
M_BUS
Classe Audio Inc
Classe Audio Inc
SEL_DATA_LATCH
Frontpanel connector
X18
34Pin IDC PCB mounting header
1 2
LD0 LD1
3 4
LD2 LD3
5 6
LD4 LD5
7 8
LD6 LD7
9 10
11 12
1413
15 16
1817 19 20 21
22 23
24 25
26 27 28 29 30 31 32 33 34
+5STDBY
16
C102 1uF
2
C98
6
1uF
14 7
13 8
15
RS232_TxD
RS232_RxD
C105 1uF
LED_LE_1 KBD_LE_0 LCD_E FREE_1
EN_LATCHES EN_CTLR0
LD0 LD1 LD2 LD3 LD4 LD5 LD6 LD7
+5DVcc
R48 10k
X12 10Pin IDC PCB mounting header
1 2 3 4 5 6 7 8 9 10
11
1
2 3 4 5 6 7 8 9
IC27 74HC574
OE CLK
1D 2D 3D 4D 5D 6D 7D 8D
VCC
GND
EN_LATCHES EN_CTLR2
LD0 LD1 LD2 LD3 LD4 LD5 LD6 LD7
1
11
2 3 4 5 6 7 8 9
IC23 74HC574
OE CLK
1D 2D 3D 4D 5D 6D 7D 8D
+5STDBY
20
VCC
19
1Q
18
2Q
17
3Q
16
4Q
15
5Q
14
6Q
13
7Q
12
8Q
10
GND
2345678
SEL_LISTENING CS3310_MUTE MUTE_MAIN MUTE_TAPE SEL_VIDEO_0 SEL_VIDEO_1 SEL_VIDEO_2 SEL_VIDEO_3
9
RP2 10k
1
+5STDBY
20
19
1Q
18
2Q
17
3Q
16
4Q
15
5Q
14
6Q
13
7Q
12
8Q
LD0 LD1 LD2 LD3 LD4 LD5 LD6 LD7
2345678
10
IC20 74HC574
1
OE
VCC
11
CLK
2
1D
1Q
3
2D
2Q
4
3D
3Q
5
4D
4Q
6
5D
5Q
7
6D
6Q
8
7D
7Q
9
8D
8Q
GND
+5STDBY
20
19 18 17 16 15 14 13 12
10
SPDIF_SEL_0 SPDIF_SEL_1 SPDIF_SEL_2 RF_RESET DSP_RESET DSP_MUTE SEL_BYPASS SEL_BP_VOL
9
RP3 10k
1
2345678
+5STDBY
1
9
RP1 10k
EN_LATCHES EN_CTLR1
LCD_R/W LCD_R/S EN_DSP_SPI
EN_AUDIO_SPI
SEL_DSP SPDIF_SEL_BANK_0 SPDIF_SEL_BANK_1
FLASH_SEL_STORE
Line filters
C125
IR_RECEIVER
VOL_ROT_0 VOL_ROT_1 KBD_SCAN
1nF
+5STDBY
C120
100nF
C112
100nF
C108
100nF
C103
100nF
C111
100nF
C123
C124
1nF
C126
1nF
1nF
AD0 AD1 AD2 AD3
AD4 AD5 AD6 AD7
1
19
IC28 74HC244
1A121Y1 1A241Y2 1A361Y3 1A481Y4
2A1172Y1 2A2152Y2 2A3132Y3 2A4112Y4
1G 2G
+5STDBY
20
VCC
LD0
18
LD1
16
LD2
14
LD3
12
LD4
3
LD5
5
LD6
7
LD7
9
10
GND
VOL_ROT_0 VOL_ROT_1 KBD_SCAN LED_LE_0 EN_LATCHES IR_RECEIVER
LCD_R/W LCD_R/S
+5STDBY
+5D
RS232 buffer
IC17
C104 1uF
1
C1+
3
C1-
4
C2+
5
C2-
C99 1uF
R71 100k
11 10
12
9
T1In T2In
R1Out R2Out
MAX232
TxD
RxD
T1Out T2Out
V+
V-
R1In R2In
GND
R91
C130
Not installed
10
1
2
IC36 SFH610-A2
+5STDBY
3
4
REMOTE_IN
Remote link
IC35A 74HC02
R92
C131
1k
330nF
IR_RECEIVER
8
9
IC35C
74HC02
10
+5STDBY
14
VCC
2
3
1
7
GND
REMOTE_OUT
REMOTE_CONTROL
IC35B
5
6
7HC402
R47 470
4
MUTE_MAIN
MUTE_MAIN
+5D
+5D
2 3
1
R52
470
2 3
1
R49
Not installed
MUTE_MAIN_RELAY
Q2 BC182LB
MUTE_BAL_RELAY
Q1 Jumper installed, see notes
MUTE_TAPE
+5D
2 3
1
R59
1k
MUTE_TAPE_RELAY
Q3 BC182LB
Title:
Project:
I/O Interface
Sample Rate Systems Oy Finlaysoninkatu 2 33210 Tampere, Finland
tel. + 358 3 254 2000 fax + 358 3 254 2030
Sheet: 6 of 9 , revision 3.0
2-Dec-1998 Printed:
File:
, drawn by Tero
Copyright © Sample Rate Systems Oy 1994 - 1997
Mute drivers
D:\CLASSE\HW\VER30\MOTHER~1\DESIGN~1\POWERS.SCH
Power connectors
Classe Audio Inc
Classe Audio Inc
X16
6
5
C83 100nF
C82 330uF
IC14 7815
1
Vin
HS1
Thermalloy 6398B
Vout
GND
2
Scope hooks
L6
C93 100nF
Murata DSS306-55F223Z16
C92 2200uF
3
+15A
TP10
Scopehook (not installed)
TP7
Scopehook (not installed)
TP6
Scopehook (not installed)
4
3
2
1
Molex 6Pin PCB header with friction lock
X17
6
5
4
3
2
1
+5STDBY
+5D
SWITCHED_POWER_ON
+POWER_GOOD
Molex 6Pin PCB header with friction lock
C96 100nF
C85 100nF
C94 100nF
C97 330uF
C84 330uF
C95 330uF
2
Vin
IC16 7915
1
Vin
2
Vin
1
GND
-Vout
Thermalloy 6398B
Vout
GND
IC13
2
7805C
IC15
1
79M05
GND
-Vout
HS2
Thermalloy 6398B
3
HS3
HS4 Thermalloy 6398B
3
3
TP19
TP12
TP5
SEL_BYPASS
CS3310_MUTE
AUDIO_SPI_SCK
AUDIO_SPI_MOSI
SEL_BP_VOL
MUTE_MAIN
MUTE_TAPE
SEL_LISTENING
SEL_VIDEO_0
SEL_VIDEO_1
SEL_VIDEO_2
SEL_VIDEO_3
C90 100nF
C86 100nF
C89 100nF
+POWER_GOOD
+5D
DGND
C91 2200uF
L5
Murata DSS306-55F223Z16
L3 Murata DSS306-55F223Z16
C87 2200uF
C88 2200uF
L4
Murata DSS306-55F223Z16
SWITCHED_POWER_ON
MH8
3mm
TP11
TP18
TP15
TP16
TP17
TP8
TP9
TP13
TP1
TP2
TP3
MH6
3mm MH5
3mm MH2
3mm MH7
3mm MH1
3mm MH4
3mm MH3
3mm
TP4
+5A
SHIELD
SHIELD
SHIELD
SHIELD
SHIELD
SHIELD
SHIELD
SHIELD
TP23
Scopehook (not installed)
TP14
Scopehook (not installed)
TP22
Scopehook (not installed)
-15A
Ground connects
L7
Ferrite bead (Not installed)
-5A
SHIELD
SHIELD
SHIELD
L2 Ferrite bead
R95
0R
R73
0R
R94
0R
TP20
L8
Ferrite bead (Not installed)
R21
SHIELD
0R
Title:
Project:
Power supplies
Sample Rate Systems Oy Finlaysoninkatu 2 33210 Tampere, Finland
tel. + 358 3 254 2000 fax + 358 3 254 2030
L1 Ferrite bead
VGNDAGND
R43
SHIELD
0R
AGND VGND
Sheet: 8 of 9 , revision 3.0
2-Dec-1998 Printed:
File:
Copyright © Sample Rate Systems Oy 1994 - 1997
, drawn by Tero
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