
TPS65251
GND
VIN
LX3
VIN
LX3
GND
BST3
VIN3
EN3
1
B
F
1
S
S
C
N
Y
S
1
P
M
C
C
S
O
R
1
MI
L
R
3
P
M
C
3
MI
L
R
3
B
F
3
S
S
LX2
BST2
LX1
VIN2
LX2
EN2
VIN1
EN1
LX1
BST1
2
P
M
C
D
N
G
2
B
F
P
_
W
O
L
2
S
S
V
7
V
D
N
G
A
D
O
O
G
P
V
3
V
V1
VIN1
VIN
V3
VIN3
VIN
VIN2
2
MI
L
R
V2
3
B
F
FB3
1
B
F
FB1
FB2
2
B
F
OSC
EN3
12V DC Supply
from enable logic
INTERNAL
VOLTAGE RAILS
V3V
V7V
Vout BUCK1
LX1
LX1
FB1
COMP1
BST1
BUCK1
Vout BUCK2
LX2
LX2
FB2
COMP2
BST2
BUCK2
Vout BUCK3
LX3
LX3
FB3
COMP3
BST3
BUCK3
EN2
from enable logic
EN1
from enable logic
SS2
SS1
SS3
VIN1
VIN2
VIN3
Rlim1
ROSC
AGND
PG
Generator
PGOOD
SYNC
Rlim2
Rlim3
PFM mode
LOW_P
VIN
GND
FUNCTIONAL BLOCK DIAGRAM
IC BLOCK DIAGRAMS
2-27
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 ...