Mitsubishi S290U Service Manual page 81

IC BLOCK DIAGRAMS
PCB-POWER
IC950 STR-M6833A
START
R2
7
SS.Tri
3.1V 9.9V
PCB-POWER SUB
IC9A1 SI-3120C
5
Vin
2
Vc (on/off)
EQUIVALENT
TO
LS TYPE TTL
FEEDBACK
14
Vin
5
REG
OVP
TSD LATCH
R4
C1 C4
3 6
GND F/B
Tr1
MIC
1
GND
IC9A2 LM2596S-ADJ
CURRENT
1.235V
SOURCE
REFERENCE
BIAS
4
GM
R2
AMP
R1 = 2.5k
ACTIVE
CAPACITOR
OP AMP
3.3V,R2 = 4.2k
5V,R2 = 7.6k
12V,R2 = 21.8k
ADJ,R2 = 0Ω
R1 = OPEN
R1
DRIVE
OCP
0.5V
OSC
INH
1.5V
R3
C3 C2
3
Vo
4
Vo sence SCL
SDA
V
DD
GND
ON/OFF
5
2.5V START
REGULATOR UP
COMP.
2.5V
CURRENT
LIMIT
COMP.
COMP. LATCH
RESET
FREQ. SHIFT
150kHz
OSC.
IC981,982 PQ3RD23
1
Vin
1
DEDICATED IC
D
2
S
4
OCP.INH
IC9A5 M62320FP
CS0 CS1 CS2
16 15
14
2
I C BUS 2
3
INTERFACE
Output Data
Input/Output
8 8
OUTPUT DATA DIRECTIONAL
REGISTER
LATCH
8 8
Reset
13
POWER ON
8
RESET
I/O PORT
12 11 10 9
D7 D6 D5 D4 D3
220mV 200mV
1
V
IN
3A
SWITCH
DRIVER
2
OUTPUT
TERMINAL
3
GND
LIMIT
2
Vo
4
Vc
3
GND
1
SHIFT REGISTER SO
8
INPUT DATA
LATCH
8
Input Data
7 6 5 4
D2 D1 D0