Sharp LC-40LE531E (serv.man2) Service Manual ▷ View online
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12.
USB Interface
USB ports are directly connected concept IC, BCM 3556.
USB ciecuit has 2 main parts:
Protection IC (U4)
Over Curent Protection IC (U108-U109)
I/O3
I/O2
I/O2
I/O6
R
RB
NC
I/O4
I/O7
AI07585B
NAND Flash
(x8)
12
1
13
24
25
36
37
48
E
I/O1
NC
NC
NC
NC
NC
NC
NC
WP
W
NC
NC
NC
VSS
VDD
AL
NC
NC
NC
CL
NC
I/O5
NC
NC
NC
I/O0
NC
NC
NC
NC
NC
NC
VDD
VDD
NC
NC
NC
NC
NC
VSS
NC
NC
NC
NC
I/O3
I/O9
I/O2
I/O6
R
RB
NC
I/O14
I/O12
I/O10
I/O4
I/O7
AI07559B
NAND Flash
(x16)
12
1
13
24
25
36
37
48
I/O8
E
I/O1
I/O11
NC
NC
NC
NC
NC
NC
NC
WP
W
NC
NC
NC
VSS
VDD
AL
NC
NC
NC
CL
NC
I/O13
I/O15
I/O5
VSS
NC
VSS
I/O0
NC
NC
NC
NC
NC
NC
VDD
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13.
CI Interface
17MB70 Digital CI ve Smart Card Interface Block diagram:
14.
DVB-C/T2 Demodulator
Sony CXD2820R
a) Key Features
DESCRIPTION
The Sony CXD2820R is a combined DVB-T2, DVB-T and DVB-C demodulator that
conforms to the ETSI EN 302-755 (second generation Terrestrial) ETSI EN 300-744
(Terrestrial) and ETSI EN 300-429 (Cable) standards.
The CXD2820R is a DVB-T2 demodulator offering class-leading performance, optimised
BOM requiring no external memory and low processor overhead. It includes a highly
integrated dual-core DVB-T and DVB-C demodulator which complies with all relevant
European performance standards.
FEATURES DVB-T2
• Supports all DVB-T2 modes, including
• Single and multiple-PLPs
• SISO and MISO transmission
• Simple API
• Fully-automatic acquisition
• Fully-automatic L1-signalling decoding
• Automatic guard-interval detection
• Automatically-calculated constant-rate TS output (using L1
signalling and ISSY)
• Acquisition range ±857kHz
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• Stream processor for automatic common- and data-PLP combination
• Null-packet insertion
• Access to channel echo profile and constellation via I2C
FEATURES DVB-C
• Wide symbol range, 0.7 to 7.2Msym/s
• Integrated matched filter 0.15 roll-off factor
• Auto Acquisition controller with fast re-acquisition mode, 15ms typ.
• Programmable acquisition range ±500kHz
• 2.8us echo cancellation at 7.2Msym/s
• Low impl. loss 0.4dB @ 64QAM and <1.0dB @ 256QAM typ.
• Enhanced channel scanning performance through improved rejection of non-digital signals
• Access to channel SNR, constellation data and dynamic equaliser tap values via I2C
APPLICATIONS
• Set Top Boxes
• IDTV with Digital only or Hybrid Tuner Support
• PC TV
• PVRs and recordable DVD players
• Test equipment
GENERAL FEATURES
• Single, 41MHz crystal (can be shared with CXD2813R analogue demod IC)
• High performance differential signal ADC
• RF power level monitor ADC
• Low IF and high IF (36MHz) mode input
• Fast 400kHz I2C compatible bus interface
• Quiet I2C interface for dedicated tuner control
• Automatic IF AGC and optional programmable
RF AGC/GPIO functions
• Configurable parallel and serial MPEG-2 TS outputs with smoothing buffer
• 3.3V, 2.5V, 1.2V supplies
• Temperature range -20°C to +85°C
• 64 pin exposed-pad LQFP 10mm x 10mm package
• Supplied with full reference design, including software driver, PCB schematic/layouts, GUI
and documentation
b) Block Diagram
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c) Pinning
O S C
P L L
T S C L K
1 0 -b it
A D C
1 2 -b it
A D C
A G C
T S IF
I2 C IF
S C L
S D A
4 1 M H z
A IN P /
A IN M
R F A IN
IF A G C /
R F A G C
T U N E R C L K
T U N E R D A T
D V B - T 2
C o r e
D V B -C
C o r e
T S V A L ID
T S S Y N C
T S E R R
T S D A T A
L D P C /
B C H
D e c o d e r
V it e r b i/
R S D e c o d e r
S tr e a m
P r o c e s s o r
T S
S m o o t h in g
D V B -T
C o r e
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