Ic Block Diagrams - Sony XVM-R75 Service Manual

2-5. IC BLOCK DIAGRAMS

U1 PT2257-S (MAIN Board) (1/2)
VIN2 VOUT2
8 7
VR 2
VOL AMP 2
VOL AMP 1
REF AMP
VR 1
1 2
VIN1 VOUT1
U13 HS-9913-ST (DISPLAY Board) (1/3)
20 19 18 17 16
5M
VDD
TR BUFFER
NMOS
GND
VCO
AMP
VSS
1 2 3 4 5
U17 KIA494AF (DISPLAY Board) (1/3)
16 15
OSCILLATOR
OFFSET
1 2 3 4 5
VCC CLOCK
6 5
VREF
LOGIC
CONTROL
3 4
GND DATA
15 14 13 12
5M
VDD
TR
NMOS
GND
VCO
AMP
6 7 8 9
14
Q
FLIP-
FLOP
Q
LOW SUPPLY
P.W.M
VOLTAGE
PROTECTIVE
6
U8 BA6247FP-Y (MAIN Board) (2/2)
OUT3
1
2
3
4
IN1 5
IN2 6
GND 7
IN3 8
VCC1 9
10
11
12
13
11
BUFFER
VSS
10
13 12 11 10 9
Q1
Q2
REFERENCE
VOLTAGE
7 8
XVM-R75
CONTROL INTERCEPT
CIRCUIT CIRCUIT
25
24
23
22 OUT2
21
20
GND
19 GND
18
OUT1
17
16
VCC2
15
VR
14
9