Sony BVW-55, Maintenance Manual

Page: 617 / 942

2-67
BVW-55
IC
C-MOS QUAD 12-BIT RAIL-TO-RAIL MICROPOWER DAC
—TOP VIEW—
X1/X2 C
V
OUT
C
CS
/LD
D
IN
REFHI C
REFLO C
REFLO D
REFHI D
D
OUT
CLK
V
OUT
D
X1/X2 D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
DD
GND
NC
V
DD
X1/X2 B
V
OUT
B
CLR
REFHI B
REFLO B
REFLO A
REFHI A
REFOUT
V
OUT
A
X1/X2 A
GND
NC
INPUT
CLK
CLR
CS
/LD
D
IN
REFHI
REFLO
X1/X2
OUTPUT
D
OUT
REFOUT
V
OUT
: SERIAL INTERFACE CLOCK
: CLEAR
: SERIAL INTERFACE ENABLE/
LOAD CONTROL
: SERIAL DATA
: TOP REFERENCE
: BOTTOM REFERENCE
: GAIN CONTROL
: SERIAL DATA VIA SHIFT REGISTER
: INTERNAL REFERENCE VOLTAGE
: D-to-A CONVERTED VOLTAGE
D
IN
4
D
OUT
10
V OUT B
26
48-BIT
POWER-ON
RESET
REF.
VOLTAGE
: 2.048 V
: 1.220 V LTC1458
LTC1458L
12-BIT
DAC B
REGISTER
24
LD
DAC B
DAC A
22
27
REFLO B
X1/X2 B
REFHI B
V
OUT
A
17
12-BIT
DAC A
REGISTER
20
LD
21
16
REFLO A
X1/X2 A
REFHI A
V
OUT
C
2
12-BIT
DAC C
REGISTER
5
LD
DAC C
7
1
REFLO C
X1/X2 C
REFHI C
V
OUT
D
13
REFOUT
19
12-BIT
DAC D
REGISTER
9
LD
12
12
48
12
12
DAC D
8
14
REFLO D
X1/X2 D
REFHI D
+
_
CS
/LD
CLK
3
11
CLR
25
LTC1458CG-E2 (LINEAR TECH)
1 8
16
17
24
32
33 40 48
49
56
64
V
DD
V
LCD
Vss
OPEN
INPUT
CE
CLK
DATA
INH
OSC
OUTPUT
COM1, 2
INPUT/OUTPUT
S1 - S53
: CHIP ENABLE
: CLOCK
: SERIAL DATA
: DISPLAY INHIBIT
: OSCILLATOR
: COMMON OUTPUT
: SEGMENT OUTPUT
LCD DRIVER
—TOP VIEW—
COMMON
DRIVER
CLOCK
GENERATOR
LATCH1 & DRIVER (1 to 56 BITS)
LATCH2 & DRIVER (57 to 112 BITS)
COM1 COM2
64 63
1
S1
23 25 26 54
S23 S24 S25 S53
58
55
OSC
INH
57
SHIFT REGISTER (56 BITS)
DATA
62 61
CLK
60
CE
56 59
V
SS
24
OPEN
2
S2
V
DD
V
LCD
LC75821W (SANYO)
LM2903PW-E05 (TI)
NJM2903V(TE2) (JRC)
GND
V
CC
1 2 3 4
5 6 7 8
+
_
_
+
DUAL VOLTAGE COMPARATORS
—TOP VIEW—
LT1121CST-5-TR (LINEAR TECH) + 5.0 V
1
2
3
4
8
7
6
5
V
CC
V
EE
NULL
_ IN
+ IN
SHUTDOWN
OUT
NULL
_
+
HIGH SPEED OPERATIONAL AMPLIFIER
—TOP VIEW—
LT1227CS8 (LINEAR TECH)
LT1227CS8-E2
NC NC
NC
V
EE
V
CC
8 7 6
5
2 1 3 4
3
2
6
OUT
OUT
IN ( + )
IN ( + )
IN ( _ )
IN ( _ )
+
_
VIDEO AMPLIFIER
—TOP VIEW—
LT1252CS8 (LINEAR TECH)
LT1252CS8-E2
1
IN
3
GND
2
OUT
GND
GND
IN OUT
POSITIVE VOLTAGE REGULATOR
—TOP VIEW—