Vestel 17MB82S, 17MB82S IDTV Schematic

TABLE OF CONTENTS

1. INTRODUCTION ...................................................................................................................... 3

1.1. General Block Diagram .................................................................................................. 4

1.2. MB82S Placement of Blocks .......................................................................................... 5

1. TUNER(MXL601) ...................................................................................................................... 6

2. AUDIO AMPLIFIER STAGE ....................................................................................................7

TAS5721 (optional) ................................................................................................................... 7

2.1. General Description ........................................................................................................ 7

2.2. Features ........................................................................................................................... 7

2.3. Absolute Ratings ............................................................................................................. 8

2.3.1. Electrical Characteristics ............................................................................................ 8

2.3.2. Operating Specifications ........................................................................................... 10

2.4. Pinning .......................................................................................................................... 11

TS4962M (Optional 2,5W) ....................................................................................................... 14

3. POWER STAGE ....................................................................................................................... 15

3.1. Power Management ...................................................................................................... 17

4. MICROCONTROLLER – MediaTek ....................................................................................... 18

4.1. Description .................................................................................................................... 18

MT5820 (Main IC) (U1) ............................................................................................................... 18

4.2. MediaTek Block Diagram ............................................................................................. 24

4.3. Crystal Specification .....................................................................................................25 

5.USB INTERFACE .......................................................................................................................25

6.DDR3 SDRAM 1Gb G-Die ........................................................................................................ 26

Description: ................................................................................................................................... 26

Features: .................................................................................................................................... 26

7. SCALER AND LVDS SOCKETS ........................................................................................... 28

7.1. LVDS sockets Block Diagram ...................................................................................... 28

7.2. Panel Supply Switch Circuit ......................................................................................... 29

8. SPI FLASH MEMORY....................................................................................................................29

8.1 EN25Q64 64 Megabit ................................................................................................ 29

8.1.1 General Description ...................................................................................................... 29

8.1.2 Features ......................................................................................................................... 30

8.1.3 Block Diagram .............................................................................................................. 30

8.1.4 Pinning .......................................................................................................................... 31

8.2

 EN25QH16 16 Megabit ..............................................................................................

8.2.1 General Description ....................................................................................................... 

8.2.2 Features ..........................................................................................................................

8.2.3 Block Diagram ............................................................................................................... 

8.2.4 Pinning .......................................................................................................................... 

9. I-LM1117/LM 800mA Low-Dropout Linear Regulator ........................................................ 

10. CONNECTORS .................................................................................................................... 

10.1. HDMI (CN707,CN708) ................................................................................................

10.2. USB(CN37, CN38) ....................................................................................................... 

10.3. VGA (CN711) ...............................................................................................................

10.4. SCART (SC1) ............................................................................................................... 

11. SERVICE MENU SETTINGS ............................................................................................. 38

11.1. Video Settings ............................................................................................................... 39

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11.2. Audio Settings ............................................................................................................... 40

11.3. Options .......................................................................................................................... 41

11.4. Tuning Settings ............................................................................................................. 43

11.5. Source Settings.............................................................................................................. 44

11.6. Diagnostic ..................................................................................................................... 45

11.7. USB Operations ............................................................................................................ 45

12. SOFTWARE UPDATE ........................................................................................................ 46

13. TROUBLESHOOTING ...................................................................................................... 466

13.1. No Backlight Problem ................................................................................................... 46

13.2. CI Module Problem....................................................................................................... 48

13.3. Led Blinking Problem ................................................................................................... 50

13.4. IR Problem .................................................................................................................... 51

13.5. Keypad Touchpad Problems ......................................................................................... 

13.6. USB Problems ............................................................................................................... 52

13.7. No Sound Problem ......................................................................................................... 

13.8. No Sound Problem at Headphone ................................................................................. 54

13.9. Standby On/Off Problem ............................................................................................... 

13.10. No Signal Problem .................................................................................................... 55

1. INTRODUCTION

17MB82S mainboard is driven by MediaTek MT5820. This IC is capable of handling Video
and audio processing, Scaling-Display processing, 3D comb filter, OSD and text
processing, LVDS/mini-LVDS transmitting, channel and MPEG2/4 decoding, integrated
DVB-T/C demodulator and media center functionality.
TV supports PAL, SECAM, NTSC colour standards and multiple transmission standards as
B/G, D/K, I/I’, and L/L’ including German and NICAM stereo. Also DVB T, DVB-C are
supported internal demoulators of MediaTek IC and DVB-S/S2 is supported with externall
demodulator.
Sound system output is supplying max. 2x8W ( less 10%THD at max output) for stereo
8 speakers.
Supported peripherals are:

1 RF input VHF I, VHF III, UHF @ 75Ohm(Common)
1 Side AV (CVBS, R/L_Audio)
1 SCART socket(Common)
1 PC input(Common)
2 HDMI 1.3 input(1 HDMI input is common, 1 input is optional)
1 S/PDIF output(Optional)
1 Headphone(Optional)
1 Common interface(Common)
2 USB(1 USB input is common, 1 USB input is optional)
1 On-board Keypad(Optional)
1 External TouchPad(Optional)

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1.1. GeneralBlockDiagram

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1.2. MB82SPlacementofBlocks

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1. TUNER(MXL601)

MxL601 is a highly integrated low-power silicon tuner IC targeting all global analog and
digital cable standards as well as digital terrestrial reception standards. Broadband input
filtering and channel filtering have been completely integrated on-chip. This integration
enables a very compact design requiring a small footprint, low bill-of-materials cost, and low
power
consumption. A signal at the 753 RF input is filtered and converted to a programmable IF
output up to 44MHz. Automatic gain control, LO generation, and channel selectivity
functions are completely integrated on the chip, which simplifies boardlevel design. All
functions of the IC can be controlled via I2C interface. MxL601 is available in a 4 x 4 mm2
24-pin QFN package.

Features :

 Tuning range from 44MHz to 1002MHz
 Programmable channel bandwidths of 6, 7,and 8MHz
 Integrated channel filtering requiring noexternal SAW filter for digital applications
 Low power consumption with 3.3V and1.8V dual-supply operation351 mW (Digital

Terrestrial)

 On-chip voltage regulator enables singlesupply 3.3V operation
 Programmable IF frequency and IF spectrum inversion
 Reference clock output available for re-use by demodulators and additional tuners in

multi-channel applications

 Input power reporting
 General purpose open-drain output GPO available for controlling off-chip circuitry
 Integrated on-chip programmable loading capacitors for the reference crystal
 I2C-compatible digital control interface
 RoHS compliance

BLOCK DIAGRAM

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2. AUDIO AMPLIFIER STAGE

TAS5721 (optional)

2.1. General Description

The TAS5721 is a 15-W stereo or 2x10 W + 1x15 W2.1 device, efficient, digital audio-power
amplifier fordriving stereo bridge-tied speakers. One serial datainput allows processing of
up to two discrete audiochannels and seamless integration to most digitalaudio processors
and MPEG decoders. The deviceaccepts a wide range of input data and data rates. Afully
programmable data path routes these channelsto the internal speaker drivers.The TAS5721
is a slave-only device receiving allclocks from external sources. The TAS5721 operateswith
a PWM carrier between a 384-kHz switching rateand a 352-KHz switching rate, depending
on the inputsample rate. Oversampling combined with a fourth- order noise shaper provides
a flat noise floorand excellent dynamic range from 20 Hz to 20 kHz.

2.2. Features

• Audio Input/Output

– 15Wx2 into 8
– Supports Single Device 0.1, 2.0, 2.1 Modes
– Wide PVDD Range, From 4.5 V to 26 V Performance
– Efficient Class-D Operation Eliminates Need for Heatsinks
– Requires Only 3.3 V and PVDD
– One Serial Audio Input (Two Audio Channels)
– I2C Address Selection via PIN (Chip Select)
– Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)
– External Headphone-Amplifier Shutdown Signal

–IntegratedCAP‐FreeHeadphoneAmplifier
–StereoHeadphone(Stereo2‐VRMSLineDriver)Outputs

• Audio/PWM Processing

– Independent Channel Volume Controls With The 24-dB to Mute
– Separate Dynamic Range Control for Satellite and Sub Channels
– 21 Programmable Biquads for Speaker EQ
– Programmable Coefficients for DRC Filters
– DC Blocking Filters
– Support for 3D Effects

• General Features

– Serial Control Interface Operational Without MCLK
– Factory-Trimmed Internal Oscillator for Automatic Rate Detection
– Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package
– Thermal and Short-Circuit Protection

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2.3. AbsoluteRatings

2.3.1 ELECTRICAL CHARACTERISTICS

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2.3.2 OPERATING SPECIFICATIONS

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2.4. Pinning

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12

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TS4962M (optional 2,5W)

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3. POWER STAGE

The DC voltages required at various parts of the chassis and panel are provided by a main
power supply unit. MB82S chassis can operate with PW05, IPS60, IPS70, IPS16, IPS17,
IPS19, PW25, PW26, PW82-3, PW03, PW04, PW06, PW07 as main power supply and
also with 12V adaptor.

Which power board can be used for board to board or cable connection?

Board to board (BTB) : PW05, IPS60, IPS70, IPS16, IPS17, IPS19
Power Cable : PW25, PW26, PW82-3, PW03, PW04, PW06, PW07

The power supplies generate 24V, 12V, 5V, 3,3V and 12V, 5V, 3.3V stand by mode DC
voltages. Power stage which is on-chassis generates 5V, 3V3 stand by voltage and 12V,
8V, 5V, 3V3, 2.5V, 1,8V and 1,2V supplies for other different parts of the chassis. Chassis
block diagram is indicated below.

The blocks on power block diagram is using dependent to main supply. For PW26 and
PW27 just common blocks are enough for proper operation.

Short CCT Protection Circuit

Short circuit protection is necessary for protecting chassis and main IC against damages
when any Vcc supply shorts to ground. Protect pin should be logic high while normal
operation. When there is a short circuit protect pin shold be logic low. After any short
detection, SW forces LEDs on LED card to blink.

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3.1. Power Management

IPS
or

12V_ VC 12V_VCC

PW
or
ADAPTER

1V2_MT5820

MOSFET

SW1

STP1

TPS54329E

5V_STBY

3V_STBY

STP2

TPS54528

BJT

BC848B

COMMON

5V_VCC

MOSFET

SW2

3.3V_VCC

TLV62065

COMMON

1.2V_AVCC

LD03

APL5910

1.5V_VCC

OR

TLV62065

COMMON

3.3V_AVCC

LD01

LM117

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4. MICROCONTROLLER – MediaTek

4.1. Description

MT5820 (Main IC) (U1)

The MediaTek MT5820 family consists of a backend decoder and a TV controller and

offers high integration for advanced applications. It combines a transport de-multiplexer, a
high definition video decoder, an audio decoder, a dual-link LVDS transmitter, a mini-LVDS
transmitter, an EPI transmitter and an NTSC/PAL/SECAM TV decoder with a 3D comb filter
(NTSC/PAL). The MT5820 enables consumer electronics manufactures to build high
quality, low cost and feature-rich DTV.
World-Leading Audio/Video Technology: The MT5820 supports Full-HD
MPEG1/2/4/h.264/DiviX/VC1/RM/AVS/VP6/VP8 (option) video decoder standards, and
JPEG. The MT5820 also supports MediaTek MDDiTM de-interlace solution can reach very
smooth picture quality for motions. A 3D comb filter added to the TV decoder recovers great
details for still pictures. The special color processing technology provides natural, deep
colors and true studio quality video. Also, the MT5820 family has built-in high resolution and
high-quality audio codec.
Rich Features for High Value Products: The MT5820 family enables true single-chip
experience. It integrates high-quality HDMI1.4a, high speed VGA ADC, LVDS, mini-LVDS,
EPI, USB2.0 receiver, TCON (option), panel overdrive (option).
WW Common Platform Capability: Reserved transport stream input is for external
demodulator for other countries or areas. TV maker can easily port the same UI to
worldwide TV models. Excellent adjacent and co-channel rejection capability grants
customers never miss any wonderful stream. Professional error-concealment provides
stable, smooth and mosaic-free video quality.

Key Features:

1. Worldwide multi-standard analog TV demodulator

2. Powerful CPU core

3. A transport de-multiplexer

4. A muti-standard video decoder

5. Rich format audio codec

6. HDMI1.4a receiver

7. Local dimming (LED backlight) (option)

8. TCON (option)

9. Panel overdrive control (option)

10. LVDS, mini-LVDS, EPI

Note: All packages are lead free

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General Features:

Host CPU

 ARM11 single core 700MHz
 Floating Point Unit
 16K I-Cache and 16K D-Cache for ARM11 core
 128K L2 Cache
 Boot ROM
 Boot from serial flash, NAND flash
 Supports security boot
 JTAG ICE interface
 Watch Dog timers

Transport Demultiplexer

 New generation 2 demux design for transport stream (TS) process
 Supports 1 serial TS input
 Supports DVB-T/T2, DVB-C, DVB-S/S2, ARIB and DTMB TS input data rate and format
 Supports multi standard hardware engines for TS encryption or decryption
 Up to12 even/odd keys for playback decryption use; 4 even/odd keys for playback for
record encryption
 Supports 80 PID filters for playback use and another 64 PID filters for record use
 Supports 80 section filters with bit-wise positive / negative mask
 Supports hardware CRC-32 check
 Supports PCR recovery function without VCXO
 Supports a micro-processor for stream processing and video start code detection

General Copy Protection Unit

 Supports CPPM/CPRM
 Supports AES with 128/192/256 bit key
 Supports AACS
 Supports DES/3DES
 Supports SHA-1/224/256
 Supports MD5
 Supports CSS
 Supports RC4
 Random number generator

MPEG1 Decoder
MPEG2 Decoder

 MPEG MP@ML, MP@HL
 Supports de-blocking filter
 Full-HD 30P dual decoder

MPEG4 Decoder (option)

 ASP@L5
 Full-HD 30P dual decoder

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H.264 (MPEG4.10 / AVC) HD Decoder (option)

 MP@L4.0, HP@L4.0, constrained BP@L3 video standard
 Full-HD 30P dual decoder

VC-1 (SMPTE421M) Decoder (option)

 MP@HL, AP@L3
 WMV9 decoder MP@HL
 Full-HD 30P dual decoder

DivX (XviD) Decoder (option)

 DIVX3 / DIVX4 / DIVX5 / DIVX6 / DIVX HD
 Full-HD 30P dual decoder

AVS Decoder (option)

 Jizhun profile @Level 6.2 (supports 4:2:0 format)
 Full-HD 30P dual decoder

RMVB Decoder (option)

 RealVideo8/9/10

Full-HD 30P dual decoder
VP6 Decoder (option)
VP8 Decoder (option)

 Supports 3D side-by-side Full-HD contents
 Full-HD 30P dual decoder

MVC

 H.264 stereo high profile Full-HD 60fps

2D Graphics

 Supports multiple color modes
 Point, horizontal/vertical line primitive drawings
 Rectangle fill and gradient fill functions
 Bitblt with transparent options
 Alpha blending and optional pre-multiplied alpha composition Bitblt
 Stretch Bitblt
 YCbCr to RGB color space conversion
 Supports index to direct mode bitblt

Image Resizer

 Supports 16bpp/32bpp direct color format
 Supports 420/422 video format
 Supports 420/422/444 JPEG format
 Arbitrary ratio vertical/horizontal scaling of video, from 1/128X to 128X
 Simple DMA
 Supports MMU in OSD mode

OSD Plane

 Three linking list OSDs with multiple color mode and all of them have up-scaler
 Supports stereo OSD

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