DOWNLOAD Sharp LC-32LD135K (serv.man2) Service Manual ↓ Size: 43.51 MB | Pages: 100 in PDF or view online for FREE

Model
LC-32LD135K (serv.man2)
Pages
100
Size
43.51 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
lc-32ld135k-sm2.pdf
Date

Sharp LC-32LD135K (serv.man2) Service Manual ▷ View online

17
LC-32LD135
INTRODUCTION
 
1. INTRODUCTION 
17MB95 main board is driven by MStar SOC. This IC is a single chip iDTV solution that 
supports  channel  decoding,  MPEG  decoding,  and  media-center  functionality  enabled  by  a 
high performance AV CODEC and CPU.  
Key features includes, 
  Combo Front-End Demodulator 
  A multi standart A/V format decoder 
  The MACEpro video processor 
  Home theatre sound processor 
  Internet and Variety of Connectivity Support 
  Dual-stream decoder for 3D contents 
  Mılti-purpose CPU for OS and multimedia 
  Peripheral and power management 
 
Supported peripherals are: 
  1 RF input VHF I, VHF III, UHF  
  1 Satellite input 
  1 Side AV (CVBS, R/L_Audio) 
  1 SCART socket(Common) 
  1 Side YPbPr 
  1 Side S-Video(Common) 
  1 PC input(Common) 
  3 HDMI input 
  1 Common interface(Common) 
  1 S/PDIF output 
  1 Headphone(Common) 
  2 USB  
  1 Ethernet-RJ45 
  1 External Touchpad(Common) 
 
NOTE: 
This technical information includes all chassis features supported, these features are enabled according 
model specification shown on page 5.
18
LC-32LD135
1.1 General Block Diagram
19
LC-32LD135
1.2  MB95 Placement of Blocks
20
LC-32LD135
CIRCUIT DESCRIPTIONS
 
2. TUNER 
A.  SI2156 Terrestrial and Cable TV Tuner: 
A.1. Description: 
The Si2156 integrates a complete hybrid TV tuner supporting all worldwide terrestrial and 
cable  TV  standards.  Leveraging  Silicon  Labs’  field  proven  digital  low-IF  architecture,  the 
Si2156  maintains  the  unmatched  performance  and  design  simplicity  of  the  Si2153  while 
further reducing footprint size and bill of materials cost. No external LNAs, tracking filters, 
wirewound inductors, or SAW filters are used.
  
Compared  with  competing  silicon  tuners  and  discrete  MOPLL-based  tuners,  the  Si2156 
delivers  superior  picture  quality  and  a  higher  number  of  received  stations  in  crowded  and 
near/far  real-world  reception  conditions.  The  high  linearity  and  low  noise  RF  front-end 
delivers  superior  blocking  performance  and  higher  sensitivity  in  the  presence  of  strong 
undesired channels and interference.
 
The Si2156 integrates the complete signal path from antenna input to IF outputs for both 
analog  and  digital  transmission  standards.  Compared  to  traditional  discrete  MOPLL-based 
tuners,  the  Si2156  eliminates  hundreds  of  external  components  including  external  LNAs,
 
tracking  filter  varactors  and  inductors  (unlike  competing  silicon  tuners),  and  SAW  filters, 
resulting in the simplest, lowest-cost BOM for a hybrid TV tuner. 
 
Interfacing  the  Si2156  seamlessly  with  the  Si2165  DVB-T/C  demodulator  creates  a 
complete terrestrial and cable DVB-T/C receiver plus PAL/SECAM tuner. 
 
A.2. Features: 
 
Worldwide hybrid TV tuner 
Analog TV: NTSC, PAL/SECAM 
-
 Digital TV: ATSC/QAM, DVB-T/T2/C, ISDB-T/C, DTMB 
-
 42-1002 MHz frequency range 
-
Compliance  to  A/74, NorDig, D-Book,  C-Book, ARIB,  EN55020, OpenCable™
 
   speci
fications 
Best-in-class real-world reception 
Exceeds discrete MOPLL-based tuners 
Highly integrated, lowest BOM 
No SAW filters or wirewound inductors required 
Integrated LNAs and complete tracking filters 
- No alignment, tuning or calibration required
 
-
 Digital low-IF architecture
 
Integrated channel select filters 
- Flexible output interface 
- ALIF to analog TV demodulator or SoC 
- DLIF to digital TV demodulator or SoC 
- 3.3 and 1.8 V power supplies 
- Standard CMOS process technology 
- 5 x 5 mm, 32-pin QFN package 
RoHS compliant 
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