Service manual

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BCDEFGH I JK
L MN
YSP-1
SCHEMATIC DIAGRAM (DSP 2/2)
52
★ All voltages are measured with a 10MΩ/V DC electronic volt meter.
★ Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
Page 53
to INPUT (2)_W10
I7Page 53
to INPUT (2)_CB9
G7 Page 53
to INPUT (3)_W11
F7
POINT A-1 pin 28 of IC300 POINT C-1 pin 13 of IC304
A-1
C-1
0
0
0
3.3
3.3
3.3
3.2 3.3
3.3
3.3
3.3
1.5
3.3
0.4
0
0
0
4.3
3.3
4.1
3.3
3.3 3.3 3.3 0 0 0 1.7 1.7 1.7 1.6 1.6
0
3.3
3.2
3.4
0
0.1
3.2
3.3
3.4
1.6
0
0
0 0 0 0 0 0 0 0 0 0 0
3.2 3.2
0
0.1 3.2 0.1
0 0 0 0 0
3.3 0.1 3.3
0
3.2 0.1
3.2
3.2
3.3 3.3 3.2 3.3
0 0 1.6 0 0 3.3 3.3
3.3 3.2
3.2
3.2
1.4 0 1.6 3.2 3.2 3.2 0.1
0
3.2 0.1
0.9 0.1
3.2
3.2
3.2
3.3
0.1
3.4
3.2
0
3.3
3.3
3.3
3.3
2.3
3.4
3.3
3.3
3.3
3.3
0
0
3.2
0
0
3.2
0
0
0
1.3 1.3
1.3
0 0 0 0
0
1.3
1.3
~
0
1.6
0 0 0 0 0
1.7 1.7 1.7
0
3.3
1.3 1.3 3.3 1.6
1.3 1.3 1.3 0 0 1.3 1.3 0 0 1.3 1.3 0 0
1.3
1.3
0
1.3
1.3
0
0
1.3
1.3
0
0
3.3
3.3
0
~
0
0
~
1.2
1.6
3.0
0
0 0
3.3 3.3
2.5
3.2 3.2 3.2 3.3 0 0 0 0 0 0
0
3.2 3.2 3.2
3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2
0
3.3
3.2
0.5
3.2
3.3
3.2
~
0
0
0
0
~
~
1.2
2.5
1.6
1.6
~
~
0.6
0
0
2.5
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.3
1.6
1.7
3.2
3.2
3.2
14.2
7.0
13.7
13.7
4.3
0
4.3
0
~
1.6
1.6
1.7
3.2
5.0
5.0
0
5.0
2.5
2.5
0
0.1
0.1
5.0
5.0
2.5
2.5
0
0
5.0
0
2.5
0
2.5
2.5
0
2.6
2.6
5.0
1.6
1.7
1.6
1.6
3.2
3.2
3.2
3.2
3.4
3.2
0.1
3.2
1.1
0 0
3.2
0
1.6 1.7
~
3.2 3.2
0
3.2
0
3.2
0 0 0
1.6 1.7 1.6 3.2
3.2 3.2
3.2
1.1
0
3.2
0
1.6 1.7 0.6
3.2 3.2
0
3.2
0
3.2
0 0 0
1.6 1.7 1.6 3.2
3.2 3.2
3.2
1.1
0 0
3.2
0
1.6 1.7
~
3.2 3.2
0
3.2
0
3.2
0 0 0
1.6 1.7 1.6 3.2
3.2 3.2
0
0
0
1.3
1.3
3.3
3.3
1.3
1.3
0
0
0
3.3
3.2
3.3
1.3
0
0
0
3.3
3.3
0.5
1.3
3.3
3.3
3.3
0
0 0
2.5 3.3
3.2 3.2 3.2
2.5
1.6
0.1
3.2
3.2
3.2
3.3
3.2
3.1
3.2
0
0
0
0
0
3.3
1.6
1.6
3.3
0
0
0
0
0.1 0.1
0
3.3
3.3
3.3 3.3 3.2 3.3
3.2 3.2
2.5
0
2.6 0.1
0
3.4 3.2
14.2
2.9 3.3 3.1 2.3
0
0.4 4.3 4.1 0.1 3.2 3.4 3.4 0.1 3.2 0.1 0.1 0.1 3.4 2.7
3.2 3.2 3.2 0.9 0.9 0.9
3.2
DIGITAL IN
SUBWOOFER OUT
ANALOG IN
100/6.3
1
7
4
3
2
5
6
8
DIR
MAIN DECODER
POST
PROSESSER
CPU
DAC
A/D
Key Input (A-D) Pull-Up Resistance 10 k-ohms
Ohm
V
ADKEY 0
94pin A/D2
ADKEY 0
95pin A/D1
0 k
~ 0.30
VOLUME
+
VOLUME
-
+1.2 k
~ 0.70
INPUT
–
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
NC
TEST
GND
IC303: S-29630AFJA
CMOS SERIAL EEPROM
Memory array
Address
decoder
Data register
Output buffer
Mode decode logic
Clock generator
VCC
GND
DI
SK
CS
DO
IC310: AK4381VT
192kHz 24Bit 2ch DAC
Audio
Data
Interface
µP
Interface
CSN
De-emphasis
Control
Clock
Divider
MCLK
CCLK
8X
Interpolator
Modulator
Modulator
SCF
SCF
8X
Interpolator
CDTI
AOUTL+
VDD
VSS
AOUTL-
AOUTR+
AOUTR-
6
PDN
5
1
7
8
LRCK
BICK
SDTI
4
2
3
9
10
11
12
13
14
DZFL
DZFR
15
16
IC312: NJM2068MD
Dual OP-Amp.
–+
OUT1
–IN1
–VCC
+VCC
OUT2
1
2
3
4
5
+IN1 –IN2
+IN2
–+
6
7
8
IC311: AK5381VT-E2
96kHz 24Bit ∆Σ A/D Converter
Serial I/O
Interface
Clock
Divider
MCLK
AINL
Decimation
Filter
Modulator
SDTO
CKS1
3
CKS0
16
CKS2
15
PDN
13
DIF
14
11
VA
6
AGND
5
VD
7
DGND
8
2
AINR
Decimation
Filter
Modulator
1
VCOM
Voltage
Reference
4
9
LRCK
SCLK
12
10
PDN
IDIF2 IDIF1 IDIF0 ODIF1 ODIF0
PDN
ILRCK
IBICK
AVSS
FILT
DEM0 DEM1 SMUTE TVDD VDD DNSS
(MCLK)
SDTO
OLRCK
OBICK
CMODE2
CMODE1
CMODE0
De-em
filter
Sample
Rate
Converter
soft
mute
PLL
Serial
Audio
I/F
Serial
Audio
I/F
IC307-309: AK4121VF
Asynchronous Sample Rate Converter
FILT
AVS S
PDN
SMUTE
DEM0
MEM1
ILRCK
IBICK
SDTI
IDIF0
IDIF1
IDIF2
VDD
DVSS
TVDD
MCLK
OLRCK
OBICK
SDTO
ODIF1
ODIF0
CMODE2
CMODE1
CMODE0
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
IC305: YSS930-SZ
DSP
MICROPROCESSOR
INTERFACE
EXTERNAL RAM
INTERFACE
CONTROL REGISTER
SDBCKO
MPLOAD
/CS SO SI SCK IOPORT19~0
CASN
RASN
RAMWEN
RAMOEN
SDO0
SDI0
SDI1
SDI2
SDI3
SDI4
SDI5
SDI6
SDI7
SDBCK
SDWCK
XO
XI
CPO
SDI INTERFACE
SDO1
SDO2
SDO3
SDO4
SDO5
SDO6
SDO7
32 bit DSP Core
PLL
DSP INTERNAL
OPERATING CLOCK
CK (30.72~40.96MHz)
COEFFICIENT
RAM
16 bit ＊1024 word
PROGRAM
RAM
50 bit ＊1024 word
ADDRESS
RAM
17 bit ＊256 word
CONTROL
SIGNALS
RAMD15~0
RAMA17~0
BCKOP
SDWCKO
WCKOP
OVF
END
DATA RAM
32 bit ＊1024 word
SDO INTERFACE
ZEROF7R-0L
IC300: LC89057W-VF4-E
192kHz 24Bit 8ch DAC
Control
Register
10
MCLK
3-wire
or 12C
Audio
I/F
DAC
LOUT1+
DATT
SCF
PCM
17
LRCK
9
BICK
14
SDTI1
15
SDTI2
16
SDTI3
13
SDTI4
22
DCLK
25
DSDL1
26
DSDR1
27
DSDL2
28
DSDR2
29
DSDL3
30
DSDR3
23
DSDL4
24
DSDR4
DSD
2
LOUT1–
1
DAC
ROUT1+
DATTSCF
SCF
SCF
48
ROUT1–
47
DAC
LOUT2+
DATT
46
LOUT2–
45
DAC
ROUT2+
DATT
44
ROUT2–
43
DAC
LOUT3+
DATT
SCF
42
LOUT3–
41
DAC
ROUT3+
DATT
SCF
40
ROUT3–
39
DAC
LOUT4+
DATT
SCF
38
LOUT4–
37
DAC
ROUT4+
DATT
SCF
33
ROUT4–
32
DZF
XI
XO
nIC
TEST
SDI3-0
SDIMCK
SDIBCK
SDIWCK
nMUTE
ZEROFLG
nINT
STATUS7-0
SDO3-0
SDOMCK
SDOBCK
SDOWCK
MEMA18-0
MEMD7-0 nMEMWE
nMEMCE
nMEMOE
nMICS MISI MISCK MISO IOPORT7-0
ClkGen
SDI SDO
MicomIF
PLL
EMS
Firmware download circuit Regiser
Format conversion
ZERO detection
Delay control Delay control
Automatic muting
Detector
DSP
memory
User muting
Format conversion
Bypass
Output ch change
Decoder
Dividing/Switcing
to each control section
Internal operation clock
Result of Status change detection
IC302: YSS948-VZ
Post Processor
1
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
Vcc
OE
B1
B2
B3
B4
B5
B6
B7
B8
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
IC301: SN74LV245APWR
Octal Bus Transceiver with 3-state Outputs