Directv Block Diagram & Signal Flow - LG LSS-3200A Service Manual

2. DIRECTV BLOCK DIAGRAM & SIGNAL FLOW
:Front-end Signal : Video Signal
: Audio Signal
LNB
Multi-
ODU
switch
IC902
Silicon
DAA
PHONE JACK
(Si3015)
Off-Hook Signal
RF Switch &
CH Mod.
TASC-H001F
AIR
RF IN
RF
CABLE
(cabling)
RF IN
CH
Select
Loop
Through TU301
or CH3/4
Modulated
CH3/4 RF
Out
Modulator
Out CH 3/4
Select Control
SW201
X101
RGB/YPbPr
25MHz
I2C CH1
OSC
IC101
CPU CLK
DATA PORT
CPU
RS232 UART1
(PPC405CR)
Driver
(MAX232)
UART0
IC204
Sys Reset
(KIA7029 &
74HC14)
IC107 & 106 IC210
uCOM
(S3C80B5)
VCR CONTROL
RF
Remote
: Digital Video Signal
: Digital Audio Signal
IC801
SDRAM
(1Mx16bx1)
QPSK TUNER
TU360
SAT.IN TBMU24311IMB
IC800
Zero-IF FEC
Tuner (STV0299) DIRECTV-TP
(LGDT1303
TPN-II)
SC Clk
LNB Control
UART Clk
(LNBP20PD) I2C CH0
Smart Card I/F
4.9152 MHz
(TDA8004T)
X901
X-tal
Modem IC
(Si2400)
IC901
UART0
AT/NT NIM TUNER
TDVB-H920P
BPF & Mix &
ATSC
SAW 1
AMP OSC & PLL
VIF
Converter
TU300
I2C CH1
480i CVBS
VSB/QAM
Monaural Audio
SW Control
Switch Channel
(74HC4066) Decoder
(LGDT3302)
IC301
I2C CH1
IC203 IC201
Display TYPE
EEPROM EPLD
(32Kx8b) (EPM3064A)
I2C CH0
IC102~103 -HD-II DMA I/F
-Ready Gen.
SDRAM Flash ROM
-Reset Gen.
(16Mx16bx2) (1Mx16x2)
-Output Exp.
-Video Glue.
IC104~105
Memory I/F
CPU I/F
3 line Bus
Front Panel
IC206~207
VFD
VFD
Controller
IR Key Scan
Key Block
Receiver
Power
Switch
IC802
AV chip
(AV1AWA)
36.864MHz
OSC
X800
Card
Holder
SMART CARD
Host I/F
VIDEO PIXEL DECODER
NTSC Video
Vsync
Sync Sep. 4H Comb
(LM1881M)
Filter
IC608
ATSC
I2C CH1
SAW 2
IF
Down
IC400
2CH L/R Audio Out
Digital Audio Out
DIRECTV AC-3/MPEG Audio
IC401~403
DIRECTV
Video PES
MUX
Video Decoder /
ATSC TP (74LCX157)
Audio Decoder /
x 3
Format Converter /
Source
Video Display Processor
Control 1
(LGDT1102 : HD-II)
IC404~405
Outputs
SDRAM
Inputs (2Mx32bx2)
IC205
ADDR Buffer Host
I/F
(74FCT163244)
Data Buffer
1.8V-2
IC957
(74FCT163245)
SC1565IST-1.8
4V
IC950 3.3V-1 3.3V-2
KIA378R33PI KIA78R33F
3V
1.8V-1 2.5V-1
IC955
SC1565IST-1.8 SC1565IST-2.5
6.5V
IC952 5V-1 5V-2
KIA78R05F KIA78R05F
SMPS
12V
IC703 Audio 8V A9V/A9V-A
KIA78DL08F KIA78R09F x 2
-8V
-5V
KIA79L05F
24V
IC951
IC954
30V
IC953
IC956/959
IC905
3-53 3-54
SPDIF MUTE
Control
Digital Audio
MUX
(74LCX157)
IC702
IC704
Buffer
(MC33078)
IC701
MTS / SAP
2CH L/R Audio Out
Processor
(MSP4448G)
NTSC Audio
2CH Monitor Audio
18.432 MHz
X-tal
X701
I2C CH1
IC606
VPX3226E
YC
20.25 MHz
ADC X601
Clock Gen.
X-tal
RGB MUTE
IC607
Hs, Vs
Line Driver
Digital
(74HC540)
Decoder
IC610
RGB
AMP
YCbCr
(AD8013AR)
IC601~603 IC609
YPbPr MUTE
LPF
AMP
(TOKO 25M)
(AD8013AR)
X 3
480i CVBS ( to CH 3/4 Modulator )
TP Demux /
VCR out (Comp.)
AMP
(TK15420)
IC604
VCR out (Y/C)
AMP
(TK15420)
IC612
X600
Main PWM 27MHz Clk Gen. 27 MHz
R,C
W/ VCXO
X-tal
LPF
(CY24212-5)
TPN-II Clock
IC605
Main VDP Clock
NT2CLK
SYSCLK
Clock Gen.
(CY24206-4)
DENC Clock
IC600
AC120V
IC500
DVI Clock
TMDS CH0,1,2
Digital RGB, Hs, Vs DVI
TMDS CLK +-
Transmitter
I2C CH1
w/ HDCP
(Sil170)
I2C CH1
I2C Ext.
(82B715)
IC501
Digital Audio
Optical Out
Audio Out 1&2
Monaural Audio
(to CH 3/4 Modulator)
RGB Video Out
YPbPr Video Out
Video Out 1,2
S-Video Out
DVI Out