Sony BVW-55, Maintenance Manual

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2-68
BVW-55
IC
LTC1473CGN-E2 (LINEAR TECH)
IN1
IN2
DIODE
TIMER
V+
V
GG
SW
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GA1
SAB1
GB1
SENSE +
SENSE _
GA2
SAB2
GB2
DUAL POWER PATH SWITCH DRIVER
—TOP VIEW—
INPUTS
DIODE
IN1
IN2
SENSE+, SENSE
_
SW
TIMER
OUTPUTS
GA1, GA2,
GB1, GB2
SAB1, SAB2
: 2-DIODE MODE
: LOGIC INPUT OF GATE DRIVERS GA1 AND GB1
: LOGIC INPUT OF GATE DRIVERS GA2 AND GB2
: INRUSH CURRENT
: OPEN DRAIN OF N-CHANNEL MOSFET SWITCH
: FAULT TIMER
: SWITCH GATE DRIVER
: SOURCE RETURN
IN1
1
+
_
GB1
14
GA1
16
SAB1
15
SW A1/B1
GATE
DRIVERS
IN2
2
TIMER
4
GB2
9
GA2
11
SENSE +
13
SENSE _
12
SAB2
10
SW A2/B2
GATE
DRIVERS
INRUSH
CURRENT
SENSE
R
S
LATCH
V
GG
SWITCHING
REGULATOR
V
GG
6
DIODE
3
SW
TO
GATE
DRIVERS
7
5 u A
V +
1.20 V
1 28
2 27
3 26
4 25
5 24
6 23
7 22
8 21
9 20
10 19
11 18
12 17
13 16
14
V
DD
GND
W
INT
A12
A7
DQ0
E2
A9
A8
A11
G
A0 - A12
E1
A6
A5
A4
A3
A2
A1
A0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
A0 - A12
DQ0 - DQ7
INT
E1
E2
W
G
OSCILLATOR
AND
CLOCK CHAIN
8 x 8
BIPORT
SRAM ARRAY
8184 x 8
SRAM ARRAY
VOLTAGE SENSE
AND
SWITCHING
CIRCUITRY
POK
32,768 Hz
CRYSTAL
LITHIUM
CELL
TOP HAT
M4T28-BR12SH1 M48T18-100MH1TR
GND
V
DD
W
E2
G
DQ0 - DQ7
E1
2 - 10, 23 - 25
11 - 13, 15 - 19
20
26
27
22
14 1 28
15
A10
INT
: ADDRESS INPUTS
: DATA INPUTS/OUTPUTS
: POWER FAIL INTERRUPT
: CHIP ENABLE 1
: CHIP ENABLE 2
: WRITE ENABLE
: OUTPUT ENABLE
C-MOS 64 K (8,184 x 8)-BIT NON-VOLATILE SRAM AND REAL TIME CLOCK
—TOP VIEW—
M48T18-100MH1TR (SGS)
R1, 2
T1, 2
: RECEIVER 1, 2
: TRANSMITTER 1, 2
1
3
4
5
11
10
13
8
C1 +
C1 _
C2 +
C2 _
T1
T2
R1
R2
V +
V _
T1
T2
R1
R2
2
6
14
7
12
9
C1 +
V +
C1 _
C2 +
C2 _
V _
T2
OUT
R2
IN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
T1
OUT
R1
IN
R1
OUT
T1
IN
T2
IN
R2
OUT
GND
V
CC
T1
400 K
+ 5 V
+
0.1 µF
+
0.1 µF
6.3 V + 5 V
INPUT
16
2 + 10 V
1
+
0.1 µF
3
4
+
0.1 µF
5
+ 5V to + 10V
VOLTAGE DOUBLER
+ 10V to _ 10V
VOLTAGE INVERTER
+
0.1 µF
16 V
6
_ 10 V
T2
400 K
+ 5 V
11
10
14
7
TTL/CMOS
INPUTS
RS-232
OUTPUTS
R1
5 K
R2
12 13
8
TTL/CMOS
OUTPUTS
RS-232
INPUTS
9
15
5 K
RS-232 TRANSMITTER/RECEIVER
—TOP VIEW—
MAX202CSE (MAXIM)
MAX202CSE-T