Main Board; Display Board - Sony STR-K900 - Fm Stereo/fm-am Receiver Service Manual

IC1452 PCM1609APT
RST 37
SCKI 38
SCKO 39
BCK 40
LRCK 41
TEST 42
VDD 43
DGND 44
DATA1 45
DATA2 46
DATA3 47
ZEROA 48
– MAIN Board –
IC501, IC601, IC701 uPC2581V-S
BIAS CIRCUIT
PROTECTOR
PRE
REG DRIVE
DRIVE
1 2 3 4 5 6 7
32 31 30
36 35 34 33
FUNCTION
CONTROL
INTERFACE
SYSTEM
SYSTEM
CLOCK
CLOCK
MANAGER
4X/8X
OVER SAMPLING
SERIAL
DIGITAL
INPUT
FILTER
INTERFACE
WITH
FUNCTION MOJULATOR
CONTROLLER
ZERO DETECT
1 2 3 4 5 6 7
PRE
DRIVE
DRIVE
8 9 10 11 12 13 14 15
29 28 27 26
OUTPUT AMP
DAC
AND LPF
OUTPUT AMP
DAC
AND LPF
OUTPUT AMP
DAC
AND LPF
ENHANCED
MULTI- OUTPUT AMP
DAC
AND LPF
LEVEL
DELTA-
SIGMA
OUTPUT AMP
DAC
AND LPF
OUTPUT AMP
DAC
AND LPF
OUTPUT AMP
DAC
AND LPF
OUTPUT AMP
DAC
AND LPF
8
– DISPLAY Board –
IC101 MC74ACT08N
1A
1B
1Y
2A
2B
2Y
GND
STR-K880/K900
25
24 VCC3
23 AGND3
22 VCC4
21 AGND4
20 VOUT8
19 AGND6
18 VCC5
17 AGND5
16 VOUT7
15 VCOM
14 VOUT1
13 VOUT2
9 10 11 12
VCC
1 14
13 4B
2
4A
12
3
11
4Y
4
10
3B
5
9 3A
6
3Y
7 8
43