Sony XTL-750W Service Manual page 30

• IC Block Diagrams
IC102 BU2486-46
16 15
14
OSC2
OSC
OSC1
INSTRUCTION DECODER
8
ROM
64WORD x 16PAGE x 8BIT
64 16
DECODER DECODER
6 4
4
PA
PC
6 4
STACK STACK
2LEVEL 2LEVEL
WATCH DOG
RESET
TIMER
1
IC401 TL1451ACNS
16 15 14 13 12
VREF
+2.5V
VCC –
+
REFERENCE
VOLTAGE
ERROR
AMP2
+2.5V
VREF
SHORT
CIRCUIT
VREF VREF
PROTECTION
COMPARATOR
+
+
– S R R
LATCH U.V.L.O
VREF/2
+
TRIANGLE
–
OSCILLATOR
ERROR
AMP1
2 3 4 5
1
13 12 11 10 9
CARRIER
S-LATCH
4
GEN
4 7
16
RAM
8
DECODER
16WORD x 2PAGE x 4BIT
MUX
4 4 4
4
4 4
PB
ALU
Y-REG
4
ACC ST
2
2 3 4 5 6 7 8
IC103 TC74HC107AF
11 10 9
14 13 12 11
J CK K
CLK
PWM
Q
COMPA- Q
RATOR2
OUTPUT2
1 2 3
OUTPUT1
PWM
COMPA-
RATOR1
GND
6 7 8
– 45 –
IC201 IR3Y29B4
B DC DET 25
GAMMA 2 26
GAMMA 0 27
RGB AMPLITUDE
28
ADJUST
BRIGHT 29
SUB BRIGHT B 30
31
SUB BRIGHT R
COMMON
32
FRP
FRP 33
F/F
34
SYNC IN
10 9 8
35
SYNC OUT
CK J
K
CLK
36
Q SYNC SEP
Q
4 5 6 7
24 23 22 21 20 19 18 17 16 15 14 13
P
N
INT/EXT SW
Y
MATRIX
R-Y G-Y B-Y
BGP
37 38 39 40 41 42 43 44 45
– 46 –
SYNC
IN
12 CHROMA OUT
11 ACC FILTER
P
N
B-Y
10
9 R-Y
8 KILLER FILTER
P N P N
R-Y G-Y B-Y
7 BURST OUT
PAL
6 COLOR
ON
P N
5 C IN
COMP
Y/C
4
IDENT FILTER
3 VIDEO IN
2
CONTRAST
1 TRAP
COMP
Y/C
46 47 48