Sony STR-K890 Service Manual page 38

STR-K890
• IC Block Diagrams
– DIGITAL Board –
IC1301 LC89056W-E
36 35
CE 37
CLK 38
MICROCOMPUTER
INTERFACE
XSEL 39
MODE0 40 MODE
SELECT
MODE1 41
DGND 42
DVDD 43
DOSEL0 44
DOSEL1 45
CKSEL0 46
CKSEL1 47
SYSTEM
XMODE 48
RESET
1 2 3
IC1401 PCM1803DBR
5 th Order
Single-End
Delta-Sigma
VINL 1
/Differential
Modulator
VINR 2 Converter
VERF1 3
VERF2 4
Reference
Single-End
5 th Order
/Differential
Delta-Sigma
Converter
Modulator
VCC 5
Power Supply
AGND 6
PDWN 7
BYPAS 8
FSYNC 9
LRCK 10
STR-K890
34 33 32 31 30 29 28 27 26 25
24 AUDIO
C BIT PA/PB
DETECT DETECT
23 EMPHA
SAMPLING
FREQUENCY
22 XIN
LOCK CLOCK 21 XOUT
DETECT
20 XMCK
19 DVDD
18 DGND
17 XSTATE
16 DATAO
15 LRCK
DATA
14 BCK
TIMING
DEMODULATOR
13 CKOUT
PLL
INPUT
CIRCUIT
4 5 6 7 8 9 10 11 12
Serial
Interface
× 1/64 (× 1/128)
Decimation
Filter
with
DC Cut Filter
Mode/
Format
Control
Clock and Timing Control
– DIGITAL Board –
IC1452 PCM1609APT
36 35 34 33
FUNCTION
RST 37
CONTROL
INTERFACE
SYSTEM
SCKI 38
SYSTEM
CLOCK
CLOCK
SCKO 39
MANAGER
BCK 40
LRCK 41
TEST 42
4X/8X
OVER SAMPLING
SERIAL
DIGITAL
VDD 43
INPUT
FILTER
INTERFACE
WITH
DGND 44
FUNCTION
CONTROLLER
DATA1 45
DATA2 46
DATA3 47
ZEROA 48
ZERO DETECT
1 2 3 4 5 6
– MAIN Board –
IC501, IC601, IC701 uPC2581V-S
BIAS CIRCUIT
PROTECTOR
20 MODE1
19 MODE0
18 FMT1
PRE PRE
REG DRIVE
17 FMT0 DRIVE DRIVE
2 3 4 5 6
1 7 8 9 10 11 12 13 14 15
16 OSR
15 SCKI
14 VDD
13 DGCD
12 DOUT
11 BCK
38 38
32 31 30 29 28 27 26 25
24
23
22
21
OUTPUT AMP
DAC 20
AND LPF
19
OUTPUT AMP
DAC
AND LPF 18
17
OUTPUT AMP
DAC
AND LPF
ENHANCED
16
MULTI- OUTPUT AMP
DAC
AND LPF
LEVEL
DELTA-
SIGMA 15
MOJULATOR
OUTPUT AMP
DAC
AND LPF
OUTPUT AMP 14
DAC
AND LPF
13
OUTPUT AMP
DAC
AND LPF
OUTPUT AMP
DAC
AND LPF
7 8 9 10 11 12
– DISPLAY Board –
IC101 TC74ACT08P
1A
1
1B
2
1Y 3
DRIVE
2A 4
2B 5
2Y 6
GND 7
IC1503 TC7WH157FU
1 8
1A Vcc
1B 2 7 1Y
VCC3
AGND3
VCC4
2Y 3 6 2B
AGND4
GND 2A
4 5
VOUT8
AGND6
VCC5
AGND5
VOUT7
VCOM
VOUT1
VOUT2
VCC
14
4B
13
4A
12
11
4Y
10 3B
9 3A
8 3Y