
Y_OUT1
Pb_OUT1
Pr_OUT1
Y IN1
Pb IN1
Pr IN1
Y IN2
Pr IN2
Pb IN2
Y IN3
Pb IN3
Pr IN3
V+
V+
V+
V+
V+
V+
V+
V+
VREG
DGND
SDA
SCL
GND
ADR
PORT2
PORT3
PORT0
PORT1
Pr OUT2
Pb OUT2
AUX0
AUX1
Y OUT2
AUX2
AUX3
Y IN4
Pb4
Pr IN4
VSS
Xin1
Xout1
HSYNCOUT
Xout2
VSYNCOUT
notCS
SIN
SECAM
not525/625
notNTSC/PAL
SCLK
not3.58/4.43
notRST
VDD2
CVIN
CVCR
SYNCIN
PDOUT
AMPIN
PDOUT
AMPIN
AMPOUT
FC
VCOIN
VCOOUT
SYNCDET
VDD1
CVOUT
Xin2
COMPOSITE OSD IN
COMPOSITE OUT
OSD_DATA
OSD_CLK
OSD_CE1
NTSC
PAL
* LC74763M OPTION TABLE
17.734
14.318
C4548 C4549
X4511
27P
27P
27P
27P
OSD_CE1
OSD_CLK
OSD_DA
OSD_CE1
Vin1
Vin2
Vin3
V+
SW1
SW2
VOUT
GND
VIDEO B'D
X
14.318
X4512
FROM FRONT PCB
FRONT_CVBS
FRONT_SC
FRONT_SY
GND
GND
S-VIDEO IN
Vcc
NC
Yout
Yin
Cin
S-VIDEO C OUT
S-V-Y OSD OUT
COMPOSITE IN1
COMPOSITE IN2
COMPONENT IN
CJJ4N070Z
MONITOR OUT
GND
GND
GND
GND
GND
GND
GND
GND
GND
FROM HDMI
CUP12373Z-4
10/19 ADD
10/19 ADD
Y
C
Y
Pb
Pr
S-Y
S-C
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
48
IC451
NJW1321FP1
C4542
100/16V
C4541
0.1
C4540
10/50V
R4522
47K
C4557
56P
C4559
22P
R4531
OPEN
R4530
100K
Q4513
C3875S
R4539
8.2K
C4551
27P
C4550
27P
X4511
17.734MHz
R4538
1.2K
R4537
22K
C4564
0.022
C4568
0.022
14
13
12
11
10
9
8
7
6
5
4
3
2
1
IC455
SN74ACT04DR
C4554
470/10V
C4556
150P
R4540
10K
R4541
270
R4542
2.2K
C4558
0.1/50V
R4532
100K
C4567
100/16V
C4566
0.022
C4565
1uF
R4546
1K
C4561
1/50V
R4545
6.8K
R4547
1K
R4543
39K
C4563
33P
C4562
22P
L4512
5.6uH
R4544
1.5K
R4548
1K
L4511
22uH
C4552
180P
R4535
1K
R4534
1K
R4533
1K
C4553
0.47/50V
C4548
27P
C4549
27P
X4512
14.318MHz
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
IC454
LC74763M
R4551
1K
R4550
1K
R4549
1K
R4536
0
C4560
6800P
C4555
10/50V
8
7
6
5
4
3
2
1
IC453
NJM2244M
C4545
10/50V
R4527
1M
C4544
100/16V
C4543
0.1
R4528
1M
C4546
0.01
R4529
1M
C4547
0.01
C4577
0.1
C4578
10/50V
C4576
10/50V
C4575
0.1
2
1
3
GND
Out In
IC456
LM1117S-5.0
L4514
10uH
C4573
10/50V
C4574
0.1
L4513
10uH
R4514
75
R4516
75
R4517
75
R4515
75
C4520
1/50V
C4519
0.01
C4522
1/50V
C4521
0.01
C4524
1/50V
C4523
0.01
C4518
1/50V
C4517
0.01
C4514
1/50V
C4513
0.01
C4516
1/50V
C4515
0.01
C4512
1/50V
C4511
0.01
GND
IN
OUT
1
2
3
IC457
KIA7809A
Q4512
A1504S
D4511
1SR159
12
3
4
5
CN501
R4523
0
C4535
0.1
C4536
100/16V
1
2
3
4
5
6
IC452
MM1511X
R4526
OPEN
C4538
470/10V
C4539
100/16V
JK452
R4552
33
R4553
33
C769
68P
C4525
470/10V
R4518
68
C4532
2P
C4526
0
C4528
0
C4530
0
C4533
2P
C4534
2P
C4569
470/10V
R4554
68
C4570
470/10V
R4555
75
C4571
470/10V
R4556
75
C4572
470/10V
R4557
75
18
17
15
16
13
14
12
11
10
9
8
7
6
53
42
1
CN452
1
2
3
JK451
JK453
C4503
68P
C4504
68P
C4501
68P
C4502
68P
C4579
0.1
C4611
100/16V
C4610
0.1
V+9V
V+5V
V+5V
V+9V
V+5V
V
9
+
V
V
5
+
V
V+12V
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
VGND
V+5V
VGND
VGND
VGND
VGND
VGND
VGND
OSD_H
OSD_SCL
OSD_SDA
OSD_CE
1321_SDA
1321_SCL
VGND
COMPOSITE_OSD
COMPOSITE
S_C_OUT
S_Y_OUT
Y_OUT
PB_OUT
PR_OUT
VGND
VGND
VGND
VGND
V+12V
VGND
VGND
VGND
VGND
VGND
2-60
2-61
SCHEMATIC DIAGRAM ( VIDEO PART )
Summary of Contents for T 748
Page 1: ...L A U N A M E C I V R E S AV Surround Sound Receiver T748 AV Surround Sound Receiver T748 ...
Page 6: ...DISASSEMBLY REMOVAL OF FRONT PANEL 1 6 ...
Page 7: ...PRINCIPAL PART LOCATION 1 7 ...
Page 18: ...IC 211 MX29LV32DTTI 70G FLASH OF DSP 2 6 ...
Page 19: ...2 7 ...
Page 29: ...2 17 BLOCK DIAGRAM ...
Page 40: ...IC 913 IC 918 TC74VCX541FT OCTAL BUS BUFFER 2 28 ...
Page 44: ...BLOCK DIAGRAM MCU DSP PART 2 32 2 33 ...
Page 45: ...BLOCK DIAGRAM AUDIO PART 2 34 2 35 ...
Page 46: ...BLOCK DIAGRAM HDMI PART 2 36 2 37 ...
Page 62: ...2 68 2 69 PRINTED CIRCUIT BOARD FRONT TOP VIEW ...
Page 63: ...2 70 2 71 FRONT BOTTOM VIEW ...
Page 64: ...2 72 2 73 INPUT TOP VIEW ...
Page 65: ...2 74 2 75 INPUT BOTTOM VIEW ...
Page 66: ...2 76 2 77 MAIN TOP VIEW ...
Page 67: ...2 78 2 79 MAIN BOTTOM VIEW ...
Page 68: ...2 80 2 81 SUB TOP VIEW ...
Page 69: ...2 82 2 83 SUB BOTTOM VIEW ...