VESTEL MB130T Service Manual
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VESTEL MB130T Service Manual

VESTEL MB130T Service Manual

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MB130T
SERVICE MANUAL

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  • Page 1 MB130T SERVICE MANUAL...

  • Page 2: Table Of Contents

    Table of Contents INTRODUCTION ..............................3 General Block Diagram .............................. 4 Placement of Blocks ..............................5 T/T2/C/A Tuner (U118) ............................6 S/S2 TUNER (U116) OPTIONAL ......................... 8 LNBp (U102) ................................9 AUDIO AMPLIFIER STAGES ........................... 11 A. MAIN AMPLIFIER (U123) (8W/10W/12W Options) ....................11 B.
  • Page 3 D. IR Problem ................................49 E. Keypad Touchpad Problems ............................ 50 F. USB Problems ................................50 G. “No Sound” Problem ..............................51 H. Standby On/Off Problem ............................51 İ. No Signal Problem ..............................52 SERVICE MENU SETTINGS ..........................53 IMPORTANT Before removing the rear cover from the TV for servicing, make sure that no cables are fixated to the cover.

  • Page 4: Introduction

    1. INTRODUCTION 17MB130T 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. 17MB130T can drive only 50Hz UHD panels. Key features include: Combo Front-End Demodulator •...

  • Page 5: General Block Diagram

    GENERAL BLOCK DIAGRAM DIGITAL/ DIGITAL SAT USB 4 TS BLOCK ETHERNET ANALOG DEMOD DEMOD ResetN SYS_SCL...

  • Page 6: Placement Of Blocks

    PLACEMENT OF BLOCKS...

  • Page 7: T/T2/C/A Tuner (U118)

    2. T/T2/C/A TUNER (U118) The Si2151 is Silicon Labs' sixth-generation hybrid TV tuner supporting all worldwide terrestrial and cable TV standards. Requiring no external balun, SAW filters, wirewound inductors or LNAs, the Si2151 offers the lowest-cost BOM for a hybrid TV tuner. Also included are an integrated power-on reset circuit and an option for single power supply operation.

  • Page 9: S/S2 Tuner (U116) Optional

    3. S/S2 TUNER (U116) OPTIONAL Description Figure: Pin description Features • Single-Chip tuner • Compliant with DVB-S2 and ABS-S standards Support PSK, (PSK and 16APSK • Direct-conversion from L-band to baseband • Symbol rate:1 to 45 Msymbol/s • • Integrated VCOs and PLL, with on-chip inductors varactors and loop filter •...

  • Page 10: Lnbp (U102)

    Block Diagram 4. LNBP (U102) Description Designed for analog and digital satellite receivers, the TPS65233 is a monolithic voltage regulator with I2C interface, specifically to provide the 13-V/18-V power supply and the 22-kHz tone signaling to the LNB downconverter in the antenna dish or to the multi-switch box. It offers a complete solution with very low component count, low power dissipation together with simple design and I2C standard interfacing.
  • Page 11 Features Complete Integration Solution for LNB and I C • Compliant with main satellite receiver systems • DiSEqC 1.x Compatible Specifications • Supports 5-V and 12-V Power Bus • LNB Short Circuit Dynamic protection • • Up to 1000-mA Accurate Output Current Limit •...

  • Page 12: Audio Amplifier Stages

    5. AUDIO AMPLIFIER STAGES Figure: The block diagram of the audio part A. MAIN AMPLIFIER (U123) (8W/10W/12W OPTIONS) Description AD82587D is a digital audio amplifier capable of driving a pair of 8 ohm, 20W or a single 4 ohm, 40W speaker, both which operate with play music at a 24V supply without external heat-sink or fan requirement.
  • Page 13 Supply voltage • – 3.3V for digital circuit – 10V~26V for loudspeaker driver • Loudspeaker output power for Stereo@ 24V – 10W x 2ch into 8_ @ 0.16% THD+N – 15W x 2ch into 8_ @ 0.18% THD+N – 20W x 2ch into 8_ @ 0.24% THD+N •...
  • Page 14 Figure 3.3: Functional Block Diagram Table 3.1: Absolute Maximum Ratings Table3.2: Recommended Operating Conditions...

  • Page 15: Headphone Amplifier (U120)

    B. HEADPHONE AMPLIFIER (U120) Description The AD22657B is a 2-Vrms cap-less stereo line driver. The device is ideal for single supply electronics. Cap-less design can eliminate output dc-blocking capacitors for better low frequency response and save cost. The AD22657B is capable of delivering 2-Vrms output into a 10k ohm load with 3.3V supply. The gain settings can be set by users from 1V/V to 10V/V externally.
  • Page 16 Table: Pin functions Table: Pin functions Table: Recommended operating conditions...

  • Page 17: Subwoofer Amplifier (U126) (12 W)

    C. SUBWOOFER AMPLIFIER (U126) (12 W) Description AD82587D is a digital audio amplifier capable of driving a pair of 8 ohm, 20W operating at 24V supply without external heat-sink or fan requirement with play music. AD82587D has 20 bands EQ function and can operate 20W stereo or 40W mono optionally. AD82587D can provide advanced audio processing capabilities, such as volume control, 20 bands speaker EQ, audio mixing, 3D surround and DRC (dynamic range control).
  • Page 18 Noise gate with hysteresis window Bass/Treble tone control DC-blocking high-pass filter Anti-pop design • Short circuit and over-temperature protection • C control interface with selectable device address • • Support hardware and software reset • Internal PLL • LV Under-Voltage shutdown and HV Under-Voltage detection Power saving mode •...

  • Page 19: Power Stage

    Table 3.3: Absolute Maximum Ratings Table 3.4: Recommended Operating Conditions 6. POWER STAGE Figure: Power Block Diagram...
  • Page 20 Figure: Power Socket and Power Options Power socket is used for taking voltages which are 24V_VCC, 12V_STBY and 5V_STBY. These voltages are produced in power card. Also socket is used for giving dimming, backlight and standby signals with power card. Power socket pinning is shown in above figure. 24V_VCC goes directly to the audio part.

  • Page 21: Fdc642P

    List of the components: • SW-1(Q105) → FDC642P SW-2(Q100) → NTGS3446 • DC-DC-1(U101) → TPS54528 • DC-DC-2(U100) → TPS563200 • DC-DC-3(U107) → TPS563200 • DC-DC-4(U103) → TPS54821 • DC-DC-5(U104) → TPS563200 • LDO-1(U112) → AP2111H • A. FDC642P Figure: Pin description...

  • Page 22: Ntgs3446

    B. NTGS3446 Features Ultra Low R DS(on) • Higher Efficiency Extending Battery Life • Logic Level Gate Drive • • Diode Exhibits High Speed, Soft Recovery Avalanche Energy Specified • IDSS Specified at Elevated Temperature • • Pb−Free Package is Available Applications •...

  • Page 23: Tps54528

    Table 4.8: Maximum ratings C. TPS54528...
  • Page 24 Figure: Pin Assignment...

  • Page 25: Tps563200

    D. TPS563200 Figure: Pin Assignment...

  • Page 26: Tps54821

    Electrical Characteristics E. TPS54821 General Description The TPS54821 in thermally enhanced 3.5 mm x 3.5 mm QFN package is a full featured 17 V, 8 A synchronous step down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs.
  • Page 27 Features Integrated 26 mΩ / 19 mΩ MOSFETs • • Split Power Rail: 1.6 V to 17 V on PVIN 200 kHz to 1.6 MHz Switching Frequency • Synchronizes to External Clock • 0.6V ±1% Voltage Reference Over Temperature • Low 2 μA Shutdown Quiescent Current •...

  • Page 28: Ap2111

    Figure 4.5 : Pin Description Table 4.6: Pin functions F. AP2111 General Description The AP2111 is CMOS process low dropout linear regulator with enable function, the regulator delivers a guaranteed 600mA (Min) continuous load current. The AP2111 provides 1.2V, 1.8V, 2.5V, 3.3V, 4.8V regulated output and 0.8V to 5V adjustable output, and provides excellent output accuracy 1.5%, it is also provides a excellent load regulation, line regulation and excellent load transient performance due to very fast loop response.
  • Page 29 Features Output Voltage Accuracy: ±1.5% • Output Current: 600mA (Min) • Foldback Short Current Protection: 50mA • • Enable Function to Turn On/Off VOUT • Low Dropout Voltage (3.3V): • 250mV (Typ) @ IOUT=600mA Excellent Load Regulation: 0.2%/A (Typ) • Excellent Line Regulation: 0.02%/V (Typ) •...

  • Page 30: Microcontroller

    7. MICROCONTROLLER A. MSTAR G10 MSD95PMVW4 (U114) Description Features...
  • Page 37 Table: Recommended operating condition...

  • Page 38: Mstar Mst7411Mfw (U130)

    B. MSTAR MST7411MFW (U130) Description The MST7411MFW is a highly integrated ASIC for doubling the frame rate of the video input to provide a conversion from 50Hz to 100Hz or 60Hz to 120Hz. The MST7411MFW comprises V-By-One receiver, film source detection and inversion, motion frame rate conversion, color space conversion and management. Features...
  • Page 39 Table: Recommended operating condition...

  • Page 40: Ddr3 Sdram

    8. 4GB DDR3 SDRAM HYNIX H5TQ4G83EFR -TEC (U113-U110) Description The H5TQ4G83EFR is a 4,294,967,296-bit CMOS Double Data Rate III (DDR3) Synchronous DRAM, ideally suited for the main memory applications which requires large memory density and high bandwidth. Hynix 4Gb DDR3 SDRAMs offer fully synchronous operations referenced to both rising and falling edges of the clock.

  • Page 41: Gbit -4Gbit(Connected Option) (256M X 8 Bit) Nand Flash Memory

    • On Die Thermal Sensor supported 8 bit pre-fetch • 9. 2GBIT -4GBIT(CONNECTED OPTION) (256M X 8 BIT) NAND FLASH MEMORY MT29F4G08ABAEAWP (U105) Description Micron NAND Flash devices include an asynchronous data interface for high-performance I/O operations. These devices use a highly multiplexed 8-bit bus (I/Ox) to transfer commands, address, and data. There are five control signals used to implement the asynchronous data interface: CE#, CLE, ALE, WE#, and RE#.
  • Page 42 Features Open NAND Flash Interface (ONFI) 1.0-compliant • Single-level cell (SLC) technology • • Organization – Page size x8: 4320 bytes (4096 + 224 bytes) – Page size x16: 2160 words (2048 + 112 words) – Block size: 64 pages (256K + 14K bytes) –...

  • Page 43: M-Bit [16M X 1] Cmos Serial Flash Eeprom

    Table: Recommended operating conditions 16M-BIT [16M X 1] CMOS SERIAL FLASH EEPROM KH25L1606EM2-12G MACRONIX SPI FLASH (U115) Description The device features a serial peripheral interface and software protocol allowing operation on a simple 3-wire bus. The three bus signals are a clock input (SCLK), a serial data input (SI), and a serial data output (SO). Serial access to the device is enabled by CS# input.

  • Page 44: Usb Interface

    Figure: Pin configuration Table: Pin description USB INTERFACE...

  • Page 45: Usb Power Switch Tps2553-1 (U109-U117-U122)

    USB POWER SWITCH TPS2553-1 (U109-U117-U122)

  • Page 46: Ci Interface

    Figure: CI interface SOFTWARE UPDATE MAIN SOFTWARE UPDATE In MB130T project, please follow software update procedure: 1. mb130_en.bin, mb130_PM51_connected.bin, mb130_RomBoot_AMZ.bin and usb_auto_update_G10.txt documents should be copied directly inside of a flash memory (not in a folder). 2. Insert flash memory to the TV when TV is powered off.
  • Page 47 Dimming pin should be high or square wave in open position. If it is low, please check S122 for Mstar side. It also can be checked at TP106. Please also check panel or power cables and connectors. Backlight power supply should be in panel specs. Please check Q124, shown below; also it can be checked TP112.
  • Page 48 STBY_ON/OFF should be low for TV on condition, please check Q114’s collector.

  • Page 49: Ci Module Problem

    B. CI MODULE PROBLEM Problem: CI is not working when CI module inserted. Possible causes: Supply, suply control pin, detects pins, mechanical positions of pins. • CI supply should be 5V when CI module inserted. If it is not 5V please check CI_PWR_CTRL, this pin should be low.

  • Page 50: Staying In Stand-By Mode

    When there is a short circuit protect pin will be logic low. If you detect logic low on protect pin, unplug the TV set and control voltage points with a multimeter to find the shorted voltage to ground. D. IR PROBLEM Problem: LED or IR not working Check LED card supply on MB130T chassis.

  • Page 51: Keypad Touchpad Problems

    E. KEYPAD TOUCHPAD PROBLEMS Problem: Keypad or Touchpad is not working Check keypad supply on MB130T. F. 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.

  • Page 52: No Sound" Problem

    G. “NO SOUND” PROBLEM Problem: No audio at main TV speaker outputs. Check supply voltages of 24V_VCC, VDD_AUDIO and 3V3_AMP with a voltage-meter. There may be a problem in headphone connector or headphone detect circuit (when headphone is connected, speakers are automatically muted).

  • Page 53: İ. No Signal Problem

    İ. NO SIGNAL PROBLEM Problem: No signal or Low signal in DVB-S/S2 mode. Check signal cables and LNB voltage, if there is no problem, check M88TS2022 (U116) supply voltages; 3V3_VCC_SAT. If the above measurements are OK, then measure the voltage from the PIN20 of U116. If the PIN1 voltage is equal to 0V, please check i2c waveforms and software.

  • Page 54: Service Menu Settings

    SERVICE MENU SETTINGS In order to reach service menu, first Press “MENU” buton, then write “4725” by using remote controller. You can see the service menu main screen below. You can check SW releases by using this menu. In addition, you can make changes on video, audio etc. by using video settings, audio settings titles. Service Menu...
  • Page 55 Video Settings Audio Settings...
  • Page 56 Options 1 Options 2...
  • Page 57 Options 3 Tuning Settings...
  • Page 58 Source Settings Diagnostic...

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17mb130t

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