CHASSIS universal (ШАСI унiверсальні) Service manual СТРОКА aaa, ddd, hhh, rrr, vvv 3850 Service manual & schematics

MB170 IDTV

SERVICE MANUAL

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Table of Contents

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

2. T/T2/C/A TUNER (U118) ...................................................................................................................................... 4

3. S/S2 TUNER (U3) OPTIONAL ............................................................................................................................. 6

4. AUDIO AMPLIFIER STAGES ............................................................................................................................. 8

MAIN AMPLIFIER (U123) (8W/10W/12W options) ................................................................................................... 8

5. POWER STAGE................................................................................................................................................... 11

A. FDC642P (Q200) ...................................................................................................................................................... 13

B. NTGS3446 (Q100) ................................................................................................................................................... 13

C. RT7278G (U101) ...................................................................................................................................................... 15

D. TPS563200 (U100, U153, U125) .............................................................................................................................. 17

E. MP8774GQ-Z 12A QFN16 (U154) ............................................................................................................................ 19

F. LDO LM1117 (U130, U140) ...................................................................................................................................... 22

6. MICROCONTROLLER APL5910 ...................................................................................................................... 24

MTK G22 (U139) ...................................................................................................................................................... 24

7. 1.5GB DDR3 SDRAM Nanya NT5CB128M16JR-FL 2133 (U3) ....................................................................... 32

Nanya 128Mx16 NT5CB128M16JR-FL 2133 (U110-U113) ....................................................................................... 32

8. 8 GB EMMC MT29F4G08ABAEAWP (U133) .................................................................................................. 33

Samsung EMMC 8GB KLM8G1GETF-B041 BGA153 (U128)Features ....................................................................... 33

9. USB INTERFACE ................................................................................................................................................ 34

USB POWER SWITCH ADJ SAFE TPS25221 SOT23-6 (U117-U109) .......................................................................... 34

10. CI INTERFACE ................................................................................................................................................... 36

11. SOFTWARE UPDATE ........................................................................................................................................ 37

Main Software Update ............................................................................................................................................ 37

12. TROUBLESHOOTING ........................................................................................................................................ 37

A. No Backlight Problem .............................................................................................................................................. 37

B. CI Module Problem .................................................................................................................................................. 39

C. IR Problem ................................................................................................................................................................ 40

D. Keypad Touchpad Problems .................................................................................................................................... 41

E. USB Problems ........................................................................................................................................................... 41

F. No Sound Problem ................................................................................................................................................... 42

G. Standby On/Off Problem ......................................................................................................................................... 43

H. No Signal Problem in DVB-S/S2 mode ..................................................................................................................... 43

İ. No Signal Problem in DVB-T mode ........................................................................................................................... 44

13. SERVICE MENU SETTINGS ............................................................................................................................. 45

14. GENERAL BLOCK DIAGRAM ......................................................................................................................... 46

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15. PLACEMENT OF BLOCKS ................................................................................................................................ 47

IMPORTANT

Before removing the rear cover from the TV for servicing, make sure that no cables are fixated to the cover.
Release the cables from their clamps and disconnect (if any). Failure to do so may damage the wires and/or other
components of the TV.

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1. INTRODUCTION

17MB170 main board is driven by MTK 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.

This board can be driven 50Hz UHD panels.

Key features include:

• Combo Front-End Demodulator

• A multi standart A/V format decoder

• The MACEpro video processor

• Home theatre sound processor

• Rich internet connectivity and completed digital home network solution

• Dual-stream decoder for 3D contents

• Multi-purpose CPU for OS and multimedia

• Peripheral and power management

• Embedded DRAM (for connected option)

Supported peripherals are:

• 1 RF input VHF I, VHF III, UHF

• 1 Satellite input

• 1 Back AV (CVBS, R/L_Audio)

• 1 PC input(Common)

• 4x HDMI inputs (with ARC option from 2nd or 3rd input)

• 1 Common interface(Common)

• 1 Optic/ Quax S/PDIF output

• 1 Headphone(Common)

• 2 USB(2X Side) and 1x internal USB for Wifi/Bluetooth

• 1 Ethernet-RJ45

• 1 External Keypad/Tact Switch

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2. T/T2/C/A TUNER (U118)

Description:

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. As with prior-generation Silicon Labs TV tuners, the Si2151 maintains very

high linearity and low noise to deliver superior picture quality and a higher number of received stations when

compared to other silicon tuners. The Si2151 offers increased immunity to WiFi and LTE interference,

eliminating the need for external filtering. For the best performance with next-generation digital TV standards,

such as DVB-T2/C2, the Si2151 delivers industry-leading phase noise performance.

Features:

• Worldwide hybrid TV tuner

o Analog TV: NTSC, PAL/SECAM
o Digital TV: ATSC/QAM, DVBT2/T/C2/C, ISDB-T/C, DTMB

• 1.7 MHz, 6 MHz, 7 MHz, 8 MHz, and 10 MHz channel bandwidths

• 42-1002 MHz frequency range

• Industry-leading margin to A/74, NorDig, DTG, ARIB, EN55020, OpenCable™,DTMB

• Lowest BOM for a hybrid TV tuner

o No balun, SAW filters, or external inductors required
o Increased ESD protection on 4pins

• Best-in-class real-world reception

o Lowest phase noise
o High Wi-Fi and LTE immunity

• Low power consumption

o 3.3 V and 1.8 V power supplies
o Integrated 1.8 V LDO for 3.3 V singlesupply operation

• Integrated power-on reset circuit

• Standard CMOS process

• 3x3 mm, 24-pin QFN package

• RoHS compliant

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Figure 1: Si2151 Pin description

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3. S/S2 TUNER (U3) OPTIONAL

Description

Figure 2: Pin description

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Features

Block Diagram

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4. AUDIO AMPLIFIER STAGES

Figure 3: The block diagram of the audio part

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.

Using I2C digital control interface, the user can control AD82587D’s input format selection, DRC (dynamic
range control), mute and volume control functions. AD82587D has many built-in protection circuits to
safeguard AD82587D from connection errors.

Features

• 16/18/20/24-bit input with I2S, Left-alignment and Right-alignment data format

• PSNR & DR(A-weighting) Loudspeaker: 97dB (PSNR), 105dB (DR) @ 24V

• Multiple sampling frequencies (Fs)

− 32kHz / 44.1kHz / 48kHz and

− 64kHz / 88.2kHz / 96kHz and

− 128kHz/176.4kHz/192kHz

• System clock = 64x, 128x, 256x, 384x, 512x, 768x,1024x Fs

− 256x~1024x Fs for 32kHz / 44.1kHz / 48kHz

− 128x~512x Fs for 64kHz / 88.2kHz / 96kHz

− 64x~256x Fs for 128kHz /176.4kHz/192kHz

• 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

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• Loudspeaker output power for Mono@ 24V

− 20W x 1ch into 4_ @ 0.17% THD+N

− 30W x 1ch into 4_ @ 0.2% THD+N

− 40W x 1ch into 4_ @ 0.24% THD+N

• Sounds processing including:

− Volume control (+24dB~-103dB, 0.125dB/step)

− Dynamic range control

− Power clipping

− Channel mixing

− User programmed noise gate with hysteresis window

− DC-blocking high-pass filter

• Anti-pop design

• Short circuit and over-temperature protection

• I2C control interface with selectable device address

• Internal PLL

• LV Under-voltage shutdown and HV Under-voltage

• detection

• Power saving mode

• Dynamic temperature control

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Figure 4: Pin description

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Figure 5: Functional Block Diagram

Table 1: Absolute Maximum Ratings

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Table 2: Recommended Operating Conditions

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5. POWER STAGE

Figure 6: Power Block Diagram

Figure 7: Power Socket and Power Options

Power socket is used for taking 12V_STBY voltage which is 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.

12V_STBY is converted several different voltages on the mainboard which are shown in below figure.

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List of the components:

• SW-1(Q200) → FDC642P 4A/20V

• SW-2(Q100) → NTGS3446 5.1A/20V

• DC-DC-1(U101) → RT7278G ADJ/3A

• DC-DC-2(U100) → TPS563200 ADJ/3A

• DC-DC-3(U104) → RT6213BHGJ6F ADJ/3A

• DC-DC-4(U153) → TPS563200 ADJ/3A

• DC-DC-5(U125) → TPS563200 ADJ/3A

• DC-DC-6(U154) → MP8774GQ-Z 12A QFN16

• LDO-1(U130) → LDO LM1117

• LDO-2(U140) → LDO LM1117

Figure 8: Power Block Diagram

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A. FDC642P (Q200)

Figure 9: Pin description

B. NTGS3446 (Q100)

Features

• Ultra Low R

• 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

− Power Management in portable and battery−powered products, i.e. computers, printers, PCMCIA cards,

cellular and cordless

− Lithium Ion Battery Applications

− Notebook PC

DS(on)

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Figure 10: Pin description

Table 3: Maximum ratings

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C. RT7278G (U101)

Figure 11: Pin Assignment

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D. TPS563200 (U100, U153, U125)

Figure 12: Pin Assignment

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Electrical Characteristics

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E. MP8774GQ-Z 12A QFN16 (U154)

Figure 13: Pin Assignment

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F. LDO LM1117 (U130, U140)

Description

The LM1117 is a low power positive-voltage regulator designed to meet 1A output current and comply with
SCSI-II specifications with a fixed output voltage of 2.85V. This device is an excellent choice for use in
battery-powered applications, as active terminators for the SCSI bus, and portable computers. The LM1117
features very low quiescent current and very low dropout voltage of 700mV at a full load and lower as output
current decreases. LM1117 is available as an adjustable or fixed 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, and

5.0V output voltages. The LM1117 is offered in a 3-pin surface mount package SOT-223 & TO-263. The

output capacitor of 10㎌ or larger is needed for output stability of LM1117 as required by most of the other

regulator circuits.

Features

● Output Current up to 1 A

● Low Dropout Voltage ( 700mV at 1A Output Current )

● Three Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V, 2.85V,

3.0V, 3.3V, 5.0V

● 2.85V Device for SCSI-II Active Terminator

● 0.04% Line Regulaion, 0.1% Load Regulation

● Very Low Quiescent Current

● Internal Current andTerminal Limit

● Logic-Controlled Electronics Shutdown

● Surface Mount Package SOT-223 & TO-263 (D2-Pack)

● 100% Thermal Limit Burn-In

Application

● Active SCSI Terminators

● Portable/Plan Top/Notebook Computers

● High Efficiency Linear Regulators

● SMPS Post Regulators

● Mother B/D Clock Supplies

● Disk Drives

● Battery Chargers

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6. MICROCONTROLLER APL5910

MTK G22 (U139)

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Features

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Table 4: Recommended operating condition

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7. 1.5GB DDR3 SDRAM NANYA NT5CB128M16JR-FL 2133 (U3)

NANYA 128MX16 NT5CB128M16JR-FL 2133 (U110-U113)

Description

Features

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8. 8 GB EMMC MT29F4G08ABAEAWP (U133)

SAMSUNG EMMC 8GB KLM8G1GETF-B041 BGA153 (U128)FEATURES

Description

SAMSUNG eMMC is an embedded MMC solution designed in a BGA package form. eMMC operation is

identical to a MMC device and therefore is a sim-ple read and write to memory using MMC protocol v5.1

which is a industry standard. eMMC consists of NAND flash and a MMC controller. 3V supply voltage is

required for the NAND area (VDDF or VCC) whereas 1.8V or 3V dual supply voltage (VDD or VCCQ) is

supported for the MMC controller. SAMSUNG eMMC supports HS400 in order to improve sequential

bandwidth, especially sequential read performance. There are several advantages of using eMMC. It is easy to

use as the MMC interface allows easy integration with any microprocessor with MMC host. Any revision or

amendment of NAND is invisible to the host as the embedded MMC controller insulates NAND technology

from the host. This leads to faster product development as well as faster times to market. The embedded flash

management software or FTL(Flash Transition Layer) of eMMC manages Wear Leveling, Bad Block

Management and ECC. The FTL supports all features of the Samsung NAND flash and achieves optimal

performance.

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Key Features

• Embedded MultiMediaCard Ver. 5.1 compatible.

• SAMSUNG eMMC supports features of eMMC5.1 which are defined in JEDEC Standard

- Major Supported Features : HS400, Field Firmware Update, Cache, Command Queuing, Enhanced Strobe

Mode, Secure Write Protection, Partition types

- Non-supported Features : Large Sector Size (4KB)

• Backward compatibility with previous MultiMediaCard system specification (1bit data bus, multi-eMMC

systems)

• Data bus width : 1bit (Default), 4bit and 8bit

• MMC I/F Clock Frequency : 0 ~ 200MHz

MMC I/F Boot Frequency : 0 ~ 52MHz

• Temperature : Operation (-25°C ~ 85°C), Storage without operation (-40°C ~ 85°C)

• Power : Interface power →VCCQ(1.70V ~ 1.95V), Memory power → VCC(2.7V ~ 3.6V)

Table 5: Supply Voltage

9. USB INTERFACE

USB POWER SWITCH ADJ SAFE TPS25221 SOT23-6 (U117-U109)

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10. CI INTERFACE

17MB170 Digital CI ve Smart Card Interface Block diagram:

Figure 14: CI interface

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11. SOFTWARE UPDATE

MAIN SOFTWARE UPDATE

In MB170 project, please follow software update procedure:

Method-1

1. Copy MstarUpgrade.bin to USB stick (root directory, FAT32)

2. Enter M-Boot console first (Long press "ENTER" key on Tera Term Console when your device reboot

then do AC On)

3. Plug the USB stick to your target board

4. Execute "custar" in M-Boot console to perform upgrading

Method-2

1. Copy upgrade_loader.pkg to root folder of USB stick (or copy upgrade_loader_no_tvcertificate.pkg if

you don't want to erase keys, credentials, etc.)

2. Insert USB disk to one of the USB ports on your TV

3. Power on TV and wait until you see the bootlogo

4. You should see logs like below

12. TROUBLESHOOTING

A. NO BACKLIGHT PROBLEM

Problem: If TV is working, led is normal and there is no picture and backlight on the panel.

Possible causes: Backlight pin, dimming pin, backlight supply, stby on/off pin

BACKLIGHT_ON/OFF pin should be high when the backlight is ON. Collector pin of Q113 must be low

when the backlight is OFF. If it is a problem, please check Q181. Also it can be tested in TP500 or Pin5 of CN2

in main board. Please also check panel cables.

Dimming pin should be high or square wave in open position. If it is low, please check S294 for MTK side.
It also can be checked at TP499. Please also check panel or power cables and connectors.

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Panel power supply should be in panel specs. Please check Q151, shown below; also it can be checked

TP276.

STBY_ON/OFF should be low for TV on condition, please check Q114’s collector.

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B. CI MODULE PROBLEM

Problem: CI is not working when CI module inserted.

Possible causes: Supply, supply 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.

• Please check mechanical position of CI module. Is it inserted properly or not?

• Detect ports should be low. If it is not low please check CI connector pins, CI module pins.

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C. IR PROBLEM

Problem: LED or IR not working

Check LED card supply on MB170 chasis.

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D. KEYPAD TOUCHPAD PROBLEMS

Problem: Keypad or Touchpad is not working

Check keypad supply on MB170.

E. 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.

USB Control is optional, so U109 and U117 may not be added. Check supply voltages only.

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F. 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). Measure voltage at HP_DETECT pin, it should be 3.3V.

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G. STANDBY ON/OFF PROBLEM

Problem: Device cannot 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 program. These printouts may give a clue about the problem. You can use VGA for Teraterm

program connection.

H. NO SIGNAL PROBLEM IN DVB-S/S2 MODE

Problem: No signal or Low signal in DVB-S/S2 mode.

Check signal cables and LNB voltage, if there is no problem, check M88TS6011 (U3) supply voltages;

3V3_VCC_SAT.

If the above measurements are OK, then measure the voltage from the PIN1 of U3.

If the PIN9 voltage is equal to 0V, please check i2c waveforms and software. If the PIN9 voltage is lower

than 1V(e.g: 0.8Vor 0.3V), change the U3 with a new part.

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İ. NO SIGNAL PROBLEM IN DVB-T MODE

Problem: No signal or Low signal in DVB-T mode.

Check signal cables and LNB voltage, if there is no problem, check SI2151 (U118) supply voltages;

3V3_TUNER.

If the above measurements are OK, then change the U118 with a new part.

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13. SERVICE MENU SETTINGS

In order to reach service menu, first chose Channel, then press “MENU” buton, press “Advanced Options”
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 under
Diagnostic title. In addition, you can make changes on video settings, audio settings, DAP Parameters etc. using
regarding titles. You may also use USB Operations for SW update and update Unique Keys and Configuration
files.

Service Menu

Diagnostic

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14.GENERAL BLOCK DIAGRAM

PANEL_VCC

51 pi ns Vby ONE SOCKET

1V5_VCC

1V5_VCC

2Gb DDR3

MEMORY

1V5_VCC

2Gb DD R3

MEMORY

TUNER_SCL
TUNER_SDA
HP_DETECT

DISEQC_OU T

3D_ SYNC

BACKL IGH T_ON/OFF _OUT

TOUCHPAD_SDA
TOUCHPAD_SCL

STR_EN

WOWL _DET

WOWL _EN

LED1
LED2

AUX_RESE T

BACK LIG HT _DI M

KEYBO ARD

PANEL_VCC_ON/OFF

AMP_RST

TS_CLK_ D2

TS_SY NC_ D2

WIFI/BT _ENABLE

SYS_SCL

SYS_SDA

ESMT
AD82587D
2X6W/8W/

10W AMP

SPEAKERs

Speak. Connector

12V_VCC

LNBP

TI

TPS65233

5V_VCC

SYS_SCL

CI SOCKET

SAT TUNER

Montage

M88TS6011

RF

Bypass

Opt

DVB S/S 2

Rese tN

3V3_VCC

3V3_VCC

BUFFER _EN

BUF

BUFFER _EN

BUF

TUNE R

Si2151

CY7C65632

USB HUB

AD22657B

HP AMP.

24MH z

12V/24V_VC C

BAV AUDIO IN

Keyboard Socket

Led/IR Socke t

HP_OUT_R

HP_OUT_L

SPDIF OUT

VGA

HEADPHONE

IN

Y/CVBS PbPr

HDMI 5V

RAM BUS

I2C

ARC

ADDRESS DATA

HDMI 3

I2C

HDMI 5V

HDMI 4

I2C

GPIOs

HP_RIGHT

HP_LEFT

SAV_R_IN

SAV_L_IN

AUDI O I/ OsVID EO I/Os

SPDIF_OUT

VGA HS/VS

BAV_ CVB S

IN

YPbPr

XTAL

2

PWR

STBY

NAND

HDMI 5V

3V3_VCC

1V8_VCC

3V3_VCC

Keybo ard

IR – Led1/2

GPIOs

KEYBOARD

STBY_ON/

OFF

DATA

TS_IN

8 Lane VbyONE

LVDS/VbyONE

PWR

3

TS B LOC K

TS_OUT

SERIAL T S

IN

DIGIT AL

DEM OD

SAT

PWR

4

ETHERNET

ET_T

ET_R

SYS_SCL

SYS_SDA

USB_4 _DP

USB_4 _DN

Bypass

Opt

DEM OD

2.0

USB 3

DIGIT AL/

ANALOG

USB 4

USB 1

USB 2

2.0

US B_WIFI _DP

US B_WIFI _DN

2.0

2.0

USB2_ DP

USB2_ DN

USB1 _DP

USB1 _DN

Mstar

G22

23X23

HDMI 1 HDMI 2

I2C

HDMI 5V

CEC

46

5V_V CC

USB 3

USB 2

5V_VCC

USB 1

5V_VCC

eMM C 8 GB

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15. PLACEMENT OF BLOCKS

LAN

Internal

Connector

Key

LED
CON

Speaker

Power

Con.

V
B
Y
O
N
E

C
O
N

RAM

MAIN

IC

CI

USB

EMMC

47

LNB

HDMI

Connectors

S/PDIF

board
CON

VGA

BAV IN

Audio
Amp

ANT.

Con.

Wifi& BT

USB

HDMI

HP

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