NAD T748 Service Manual page 58

SCHEMATIC DIAGRAM ( VIDEO PART )
CUP12373Z-4
C4511 0.01
FRONT_CVBS
GND C4512 1/50V
0.01
C4513
FRONT_SC
GND C4514 1/50V
0.01
C4515
FRONT_SY
C4516
1/50V
VGND
C4517 0.01
COMPOSITE IN1 1
C4518 1/50V
CJJ4N070Z 3
C4519 0.01
2
COMPOSITE IN2
JK451 C4520 1/50V
VGND 10/19 ADD
VGND VGND VGND VGND
C4523 0.01
S-Y C4524 1/50V
Y
S-VIDEO IN 0.01
C4521
C
S-C 1/50V
C4522
C4525
MONITOR OUT
R4518
470/10V
68
JK452
VGND
VGND VGND VGND VGND VGND
10/19 ADD
Y
0
C4526
Pb
0
VGND C4528
COMPONENT IN
Pr
0
VGND C4530
JK453
VGND
VGND
2-60
VIDEO B'D
38 37 36 35 34 33 32 31 30 29 28 27 26 25
24
Pb OUT2
39 GND
23
PORT0 V+9V
40 Pr IN4
PORT1 22
41
V+
Pr OUT2 21
42 Y IN3
V+ 20
43
GND IC451
VREG 19
NJW1321FP1
44 Pb IN3
18
DGND
45 V+
GND 17
46 Pr IN3
GND SDA 16
VGND VGND VGND
47
Y IN2 SCL 15
48
1 2 3 4 5 6 7 8 9 10 11 12 13 14
VGND
R4522
47K
R4523
0
C4536
100/16V
C4538
470/10V
VGND
* LC74763M OPTION TABLE
C4548 C4549 X4511 X4512
L4511
PAL 27P 27P 17.734 14.318
V+5V
22uH
NTSC 27P 27P 14.318 X
IC454
LC74763M
V+5V
VSS
VGND VGND
VDD1
VGND R4548
Xin1
X4511 SYNCDET
1K
17.734MHz
Xout1
VCOOUT
L4512
HSYNCOUT
VCOIN
5.6uH
VGND
VGND VGND
VGND VGND Xin2
8 7 6 5 FC
X4512
14.318MHz VGND
Xout2
AMPOUT
R4546
VSYNCOUT
AMPIN 1K
OSD_CE1
VGND VGND notCS
1 2 3 4
PDOUT
R4544 1.5K
OSD_DA
SIN
AMPIN
OSD_CLK 39K
VGND R4543
VGND VGND SCLK
PDOUT
C4558 0.1/50V
SECAM
SYNCIN
C4557 56P
not525/625
CVCR
VGND VGND VGND VGND VGND
notNTSC/PAL
CVIN
not3.58/4.43
VDD2
VGND
VGND notRST
CVOUT
VGND
VGND
C4554 470/10V
COMPOSITE OSD IN
COMPOSITE OUT C4555 R4538
10/50V
1.2K
Q4512
A1504S
VGND VGND
VGND VGND
OSD_CLK
OSD_CE1
8 9 10 11 12 13
7 6 5 4 3 2
VGND
OSD_CE1
C4535 S-VIDEO C OUT
V 5 + V V 9 + V
0.1
S-V-Y OSD OUT IC456
LM1117S-5.0 KIA7809A
VGND
L4513 L4514
6 5 4 2 3 3
Out In
10uH 10uH
V+5V
IC452
MM1511X
1
1 2 3
VGND VGND
VGND
VGND VGND
VGND R4547
1K
C4561 R4545
1/50V
6.8K
C4560 6800P
VGND
Q4513
C3875S
VGND VGND
V+9V
V+5V
14
VGND
IC455
1
SN74ACT04DR
CN452
OSD_H
R4549 1K OSD_SCL
OSD_DATA R4550 1K OSD_SDA
R4551 1K OSD_CE
33
R4552 1321_SDA
R4553 33 1321_SCL
R4554 68 C4569 470/10V COMPOSITE_OSD
R4555 75 C4570 470/10V COMPOSITE
R4556 75 C4571 470/10V S_C_OUT
75 470/10V
R4557 C4572 S_Y_OUT
Y_OUT
PB_OUT
PR_OUT
V+12V VGND
V+12V
IC457
D4511
1
OUT IN
1SR159
GND
2
VGND
2-61