Sony STR-K990 Service Manual page 39

• Waveforms
– DIGITAL Board –
1
IC1501 9 (MCLK1)
72 ns
1 V/DIV, 40 ns/DIV
2
IC1101 id (X1)
41.6 ns
1 V/DIV, 20 ns/DIV
• IC Block Diagrams
– DIGITAL Board –
IC1503 TC7WH157FU
1 8
1A Vcc
1B 2 7 1Y
2Y 2B
3 6
GND 2A
4 5
3
IC1301 ws (XIN)
3.2 Vp-p
81 ns
1 V/DIV, 40 ns/DIV
4 Vp-p
IC1301 LC89056W-E
48
SYSTEM
RESET
DISEL
1
SPDIF 2
DINO 3
INPUT
DINI 4
CIRCUIT
DIN2 5
D.GND
6
DVDD 7
R
8
PLL
VIN
9
LPF 10
AVDD 11
AGND 12
4.1 Vp-p
47 46 45 44 43 42 41 40 39
MODE
SELECT
DATA
DEMODULATOR
CLOCK
TIMING
13 14 15 16 17 18 19 20 21 22
STR-K990
38 37
MICROCOMPUTER
INTERFACE
36
35
34
33
32
31 DGND
LOCK
SAMPLING
DETECT FREQUENCY
30
29
C BIT
28
DETECT
27
26
PA/PB
DETECT
25
23 24
DI
DO
ERROR
BPSYNC
LOCK
DVDD
VF/P3/C3
F2/P2/C2
F1/P1/C1
F0/P0/C0
CSFLAG
39