Sharp LC-32LE361E Service Manual ▷ View online
25
LC-32/40LE361
LC-32/40LE360
LC-32/40LE362
LC-32/40LE363
6. USB PROBLEMS
Problem: USB is not working or no USB Detection.
Check USB Supply, It should be nearly 5V. Also USB Enable should be logic high.
Check USB Supply, It should be nearly 5V. Also USB Enable should be logic high.
7. NO SOUND PROBLEM
Problem: No audio at main TV speaker outputs. Check supply voltages of 24V VDD_AUDIO, 3.3V
AUDIO_AVDD and AUDIO_DVDD with a voltagemeter. There may be a problem in headphone
connector or headphone detect circuit (when headphone is connected, speakers are automatically muted).
Measure voltage at HP_DETECT pin, it should be 3.3v.
AUDIO_AVDD and AUDIO_DVDD with a voltagemeter. There may be a problem in headphone
connector or headphone detect circuit (when headphone is connected, speakers are automatically muted).
Measure voltage at HP_DETECT pin, it should be 3.3v.
26
LC-32/40LE361
LC-32/40LE360
LC-32/40LE362
LC-32/40LE363
8. STANDBY ON/OFF PROBLEM
Problem: Device can not boot, TV hangs in standby mode. There may be a problem about power supply.
Check main supplies with a voltage-meter. Also there may be a problem about SW. Try to update TV
with latest SW. Additionally it is good to check SW printouts via Teraterm. These printouts may give a
clue about the problem. You can use Scart-1 for terraterm connection.
Check main supplies with a voltage-meter. Also there may be a problem about SW. Try to update TV
with latest SW. Additionally it is good to check SW printouts via Teraterm. These printouts may give a
clue about the problem. You can use Scart-1 for terraterm connection.
9. NO SIGNAL PROBLEM
Problem: No signal in TV mode.
Check tuner supply voltage; 5V_VCC, 3V3_TUNER and 1V8_TUNER. Check tuner options are
correctly set in Service menu. Check AGC voltage at IF_AGC pin of tuner
correctly set in Service menu. Check AGC voltage at IF_AGC pin of tuner
.
27
LC-32/40LE361
LC-32/40LE360
LC-32/40LE362
LC-32/40LE363
CHAPTER 7. MAJOR IC INFORMATIONS
[1] INTRODUCTION
1. INTRODUCTION
17MB95M 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,
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 standard A/V format decoder
The MACEpro video processor
Home theatre sound processor
Internet and Variety of Connectivity Support
MultI-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 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)
28
LC-32/40LE361
LC-32/40LE360
LC-32/40LE362
LC-32/40LE363
[2] MAJOR IC INFORMATION
1. TUNER
A. SI2158 Terrestrial and Cable TV Tuner:
A.1. Description:
The Si2158 integrates a complete hybrid TV tuner supporting all worldwide terrestrial and cable
TV standards. Leveraging Silicon Labs’ field proven digital low-IF architecture, the Si2158
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.
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 Si2158 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.
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 Si2158 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
Si2158 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.
Si2158 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.
A.2. Features:
- Worldwide hybrid TV tuner
- Analog TV: NTSC, PAL/SECAM
- Digital TV: ATSC/QAM, DVB-T/T2/C/C2, ISDB-T/C, DTMB
- 42-1002 MHz frequency range
- Compliance to A/74, NorDig, DTG, ARIB, EN55020, OpenCable™ specifications
- 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
- 4 x 4 mm, 28-pin QFN package
- RoHS compliant
- Analog TV: NTSC, PAL/SECAM
- Digital TV: ATSC/QAM, DVB-T/T2/C/C2, ISDB-T/C, DTMB
- 42-1002 MHz frequency range
- Compliance to A/74, NorDig, DTG, ARIB, EN55020, OpenCable™ specifications
- 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
- 4 x 4 mm, 28-pin QFN package
- RoHS compliant
Click on the first or last page to see other LC-32LE361E service manuals if exist.