Sony WRT-822B, Service Manual

Page: 34 / 46

5-4
WRT-822B
IC
SA575DK-T (PHILIPS)
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
+
_
G
G
V
CC
NE575
OP AMP
OP AMP
SUM
AMP
SUM
AMP
V
REF
10k
10k
GAIN CELL
GAIN CELL
10k
10k
RECTIFIER
3.9k
3.9k
RECTIFIER
GND
+ V
IN
1
_ V
IN
1
V
OUT
1
RECT.
IN
1
C
RECT
1
SUM
OUT
1
COMP.
IN
1
V
REF
GAIN CELL
IN
1
+ V
IN
2
_ V
IN
2
V
OUT
2
RECT.
IN
2
C
RECT
2
SUM
OUT
2
COMP.
IN
2
SUM NODE 2
GAIN CELL
IN
2
+
_
+
_
+
_
LOW VOLTAGE COMPANDOR
—TOP VIEW—
TC4069UBFT (EL,N) (TOSHIBA)
14
V
DD
13 12 11 10 9 8
1 2 3 4 5 6 7
GND
A Y Y = A
Y = A
A
0
1
0
1 ; LOW LEVEL
; HIGH LEVEL
Y
1
0
C-MOS INVERTER
—TOP VIEW—
TC4S11F (TE85R) (TOSHIBA)
1
2
GND 3
A
B
Y
A
B
Y =
Y = A • B = A + B
A
0
0
1
1
B
0
1
0
1
Y
1
1
1
0
0
1
: LOW LEVEL
: HIGH LEVEL
5 V
DD
4
2
1
4
C-MOS 2-INPUT NAND GATE
—TOP VIEW—
TC4W53FU (TE12R) (TOSHIBA)
1
INH
0
0
1
A
0
1
x
ch0
ch1
OPEN
2
3
OPEN
INH V
EE
ch1
ch0
2 3
C
A
6
7 1
5
GND 4
8 V
DD
6
7
5
ON
CHANNEL
CONT. INPUT
C-MOS 2-CHANNEL MULTIPLEXER/DEMULTIPLEXER
—TOP VIEW—
0
1
x
: LOW LEVEL
: HIGH LEVEL
: DON’T CARE
TC74HC4051AFT (EL) (TOSHIBA)
0
1
x
: LOW LEVEL
: HIGH LEVEL
: DON’T CARE
X0 - X7
XC
A, B, C
EN
: ANALOG INPUTS/OUTPUTS
: COMMON INPUT/OUTPUT
: CHANNEL SELECT INPUT
: ENABLE INPUT
1 16
15
14
13
2
3
4
V
DD
GND
V
EE
X1
X0
5 12
11
10
9
6
7
8
B
C
X3
A
X2
X5
EN
XC
X7
X4
X6
X0
X1
X3
12
13
14
15
1
XC
X5
X6
X2
X4
X7
3
5
2
4
6
OPEN
EN
10
B
9
C
11
A
0
0
0
0
0
0
0
0
1
EN
CONTROL INPUTS
C
0
0
0
0
1
1
1
1
x
SELECTED
CHANNEL
X0
X1
X2
X3
X4
X5
X6
X7
OPEN
SELECT
B
0
0
1
1
0
0
1
1
x
A
0
1
0
1
0
1
0
1
x
C-MOS 8-CHANNEL ANALOG MULTIPLEXER/DEMULTIPLEXER
—TOP VIEW—
TC74VHCU04FT (EL) (TOSHIBA)
A A Y = Y
Y = A
HEX INVERTERS
—TOP VIEW—
14 13 12 11 10 9 8
1 2 3 4 5 6 7
GND
V
CC
Y
1
0
A
0
1
0
1
: LOW LEVEL
: HIGH LEVEL
TC7W14FU (TE12R) (TOSHIBA)
Y = A
A Y
Y = A
1
3
6
7
5
2
0 : LOW LEVEL
1 : HIGH LEVEL
8
7
6
5
1
2
3
4
Y
1
0
A
0
1
C-MOS HEX INVERTERS
—TOP VIEW—