Read Sony STR-DB900 Service Manual online
14
14
STR-DB900
STR-DB900
4-2. BLOCK DIAGRAM
— AUDIO DSP SECTION —
SEL
SDI2
DIR-DATA
ADC-DATA-L/R
ADC-DATA-SL/SR
ADC-DATA-C/SW
BCK
LRCK
6
Y 5
30
+3.3V
SDO1
SDO3
SDO2
SDO4
BCKO
23
25
24
26
20
LRCKO 19
SCKOUT 14
HACN 32
HDIN 33
HCLK 34
HDOUT 35
HCS 36
GP12 37
GP9 68
PM 113
XRST 2
KFSIO 22
GP8
MCK
DIR-AUDIO
69
EXLOCK 59
DSP-HACN
5
DSP-DI
174
DSP-CLK
173
1
4
9
7
3
3
DSP-RST
DSP-PM
DSP-GP9
DSP-GP12
DSP-CS
DSP-DO
2
DIR-ERR
14
TUN-TUNED
155
TUN-STEREO
156
TUN-MUTE
157
TUN-DATA
153
TUN-DO
152
RDS-SIGNAL
53
RDS-DATA
158
RDS-INT
AEP,UK MODEL
102
TUN-CLK
151
TUN-LAT
154
ASEL-A
ASEL-B
ASEL-B
DSEL-A
DSEL-B
DSEL-B
VSEL-A
VSEL-B
VSEL-B
ADC-RST
170
169
169
44
43
43
73
74
171
DIR-DI
11
DIR-CE
15
DIR-CLK
12
DIR-CKSEL1
22
XDIR-SEL
20
DIR-DO
TU-TUNED
DIR-ERR
TU-STEREO
TU-MUTE
TU-DATA
TU-DO
RDS-SIG
RDS-DATA
RDS-INT
RDS-DATA
RDS-INT
TU-CLK
TU-LATCH
ASEL-A
ASEL-B
ASEL-B
DSEL-A
DSEL-B
DSEL-B
VSEL-A
VSEL-B
VSEL-B
ADC-RST
DIR-DI
DIR-CE
DIR-CLK
DIR-CKSEL
DIR-XMODE
DIR-DO
21
DSP-BSTSEL
8
SDI2-SEL
19
DSP-BST
DATA-L/R
DATA-C/SW
DATA-SL/SR
DATA-SL/SR
DATA-SB
BCKO
BCKO
LRCKO
SCK
EN
I-LIMIT
AMP
CONT
CONT
6
XDAMP-RST 26
XDAMP-NSMUTE 27
XDAMP-EN 32
XDAMP-PROTECT 33
DAMP-DATA 24
DAMP-CLK 25
DAMP-CS1-L/R 28
DAMP-CS2-C/SW
DAMP-CS3-SL/SR
DAMP-CS4-SB
29
30
31
31
HP-SW 37
HP-RY-SO1 39
QS-RY/SW-RY-SO1
INIT
MUTE
SCDT
SHIFT
LATI-L/R
LATI-C/SW
LATI-SL/SR
LATI-SB
HP SW
PH-RY
RELAY
38
BST 56
Y
5
A 1
B 2
SEL
6
SDI1
18
SDI3
114
BCKI1
17
LRCKI1
15
108,105-102,99,
98,80-77,
75-72
7-10,13-16,
29-32,35-38
5-1,44-42,
27-24,21-28
112,110,109,
97-92,82,
85-83,66-62
WEO
45
CSO
44
MCLK1
9
MCLK2
12
A
1
CONT-2
CONT-1
B
2
WE
D0
I
D15
D0
I
D
•
D08/GP0
I
D15/GP7
A0
I
A15
A0
I
A15
17
CS 6
XEPROM-DATA 76
XEPROM-CLK 75
SDA
5
SCL
6
X-IN 141
1
+3.3V
(STBY)
CN202
FLASH ROM
WRITE
X201
12.5MHz
EEPROM
IC209
AUDIO DSP
IC206
DATA SELECT
IC210
SDRAM
IC203
SYSTEM
CONTROL
IC202 (1/2)
BST SELECT
IC204
RESET
IC201
2
3
3
4
5
5
6
GND
STOP
+5V
3.3V
RESET
RESET
MD2
FLASH-SO
FLASH-SO
FLASH-SI
X-OUT 143
XRESET
+3.3V
144
MD2 138
FLASH-SO 126
FLASH-SI 125
1
2
+3.3V
REG.
IC205
3
1
RESET
Q301,302
X202
13.5MHz
B
DAMP
SECTION
(Page 15)
DISPLAY
SECTION
SECTION
(Page 16)
C
A
INPUT/
TUNER
TUNER
SECTION
(Page 13)
: FM
• Signal path
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