Sony BVW-55 Maintenance Manual page 617

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