VESTEL IDTV MB120 User manual

MB120 IDTV
SERVICE MANUAL

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Table of Contents
1. INTRODUCTION ..........................................................................................................................................................2
2. TUNER ...........................................................................................................................................................................3
A. SI2151 Terrestrial and Cable TV Tuner: .....................................................................................................................3
B. M88TS2022 Satellite Tuner........................................................................................................................................5
3. AUDIO AMPLIFIER STAGES......................................................................................................................................6
A. MAIN AMPLIFIER (U8) (10W/12W options)...............................................................................................................6
B. SUBWOOFER AMPLIFIER (U9) (12 W) ........................................................................................................................ 8
C. HEADPHONE AMPLIFIER (U59) ................................................................................................................................10
D. SUBWOOFER PREAMPLIFIER (U30)..........................................................................................................................12
E. SCART AUDIO AMPLIFIER (U31) ...............................................................................................................................12
4. POWER STAGE........................................................................................................................................................... 12
A. TPS54528 .................................................................................................................................................................13
B. TPS54628 .................................................................................................................................................................15
C. TPS54821 .................................................................................................................................................................17
D. FDS4685 ...................................................................................................................................................................19
E. NTGS3446 ................................................................................................................................................................20
F. APL5910 ...................................................................................................................................................................21
G. LM1117 .................................................................................................................................................................... 23
5. MICROCONTROLLER (MSTAR MSD95M0D)........................................................................................................ 24
6. VIDEO BACK-END PROCESSOR (MSTAR) ........................................................................................................... 31
MST7410FE ...................................................................................................................................................................31
7. 2Gb DDR3 SDRAM ..................................................................................................................................................... 34
Hynix H5TQ2G63GFR ....................................................................................................................................................34
8. 4Gb DDR3L SDRAM................................................................................................................................................... 35
Hynix H5TQ4G63GFR ....................................................................................................................................................35
9. 32GBIT (4G X 8 BIT) NAND FLASH MEMORY ..................................................................................................... 37
MT29F4G08ABAEAWP..................................................................................................................................................37
10. 16M-BIT [16M x 1] CMOS SERIAL FLASH EEPROM ............................................................................................ 39
A. MX25L1606E SPI Flash .............................................................................................................................................39
B. M25Q32FV SPI Flash ................................................................................................................................................41
11. DEMODULATOR STAGE.......................................................................................................................................... 43
12. LNB SUPPLY AND CONTROL IC ............................................................................................................................ 46
TPS65233 ......................................................................................................................................................................46
13. SOFTWARE UPDATE ................................................................................................................................................ 47
Main SW update ...........................................................................................................................................................47

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14. TROUBLESHOOTING................................................................................................................................................ 48
A. No Backlight Problem .............................................................................................................................................. 48
B. CI Module Problem ..................................................................................................................................................50
C. Staying in Stand-by Mode ........................................................................................................................................52
D. IR Problem................................................................................................................................................................54
E. Keypad Touchpad Problems .................................................................................................................................... 55
F. USB Problems...........................................................................................................................................................56
G. No Sound Problem ...................................................................................................................................................57
H. Standby On/Off Problem .........................................................................................................................................58
İ. No Signal Problem.................................................................................................................................................... 58
15. GENERAL BLOCK DIAGRAM ................................................................................................................................. 59
1. INTRODUCTION
17MB120 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. This IC also supports 4K2K (UHD).
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
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 YPbPr / Back S-Video(Common)
1 PC input(Common)
4 HDMI input(Common)
1 Common interface(Common)
1 Optic S/PDIF output(Common)
1 Stereo audio input for PC(Common)
1 Subwoofer output(Common)
1 Headphone(Common)
1x USB3.0 and 2xUSB2.0(Common)
1 Ethernet-RJ45 (Common)
1 External Touchpad(Common)

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2. TUNER
A. SI2151 TERRESTRİAL AND CABLE TV TUNER:
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
oAnalog TV: NTSC, PAL/SECAM
oDigital 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
oNo balun, SAW filters, or external inductors required
oIncreased ESD protection on 4pins
Best-in-class real-world reception
oLowest phase noise
oHigh Wi-Fi and LTE immunity
Low power consumption
o3.3 V and 1.8 V power supplies
oIntegrated 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
Figure 1.1 Si2151 Pin description

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Table 1.1 Pin Functions

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B. M88TS2022 SATELLİTE TUNER
Features and General Description
Pin Assigment

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Absolute Maximum Ratings and Recommended Operating Conditions
3. AUDIO AMPLIFIER STAGES
A. MAIN AMPLIFIER (U8) (10W/12W OPTİONS)
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

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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
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
Figure 3.2: Pin description

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Figure 3.3: Functional Block Diagram
Table3.1: Absolute Maximum Ratings
Table3.2: Recommended Operating Conditions
B. SUBWOOFER AMPLIFIER (U9) (12 W)
Description
AD82586C 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.
AD82586C has 20 bands EQ function and can operate 20W stereo or 40W mono optionally.
AD82586C can provide advanced audio processing capabilities, such as volume control, 20 bands speaker
EQ, audio mixing, 3D surround and DRC (dynamic range control). These functions are fully programmable via
a simple I
2
C control interface.
Robust protection circuits are provided to protect AD82586C from damage due to accidental erroneous
operating condition. AD82586C is more tolerant to noise and PVT (Process, Voltage, and Temperature)
variation than the analog Class-AB or Class-D audio amplifier counterpart implemented by analog circuit
design. AD82586C is pop free during instantaneous power switch because of its built-in, robust anti-pop circuit.

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Features
16/18/20/24-bits input with I2S, Left-alingment and Right-alingment data format
PSNR & DR (A-weighting) Loudspeaker: 99dB (PSNR), 104dB (DR) @24V
Multiple sampling frequencies (Fs)
32kHz / 44.1kHz / 48kHz and
64kHz / 88.2kHz / 96kHz and
128kHz / 176.4kHz / 192kHz
System clock = 64x, 128x, 192x, 256x, 384x, 512x, 576x, 768x, 1024x Fs
64x~1024x Fs for 32kHz / 44.1kHz / 48kHz
64x~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 at 24V
10W x 2CH into 8 ohm @0.17% THD+N for stereo
20W x 2CH into 8 ohm @0.26% THD+N for stereo
Sound processing including:
20 bands parametric speaker EQ
Volume control (+24dB~-103dB, 0.125dB/step)
Dynamic Range Control (DRC)
Dual band DRC
Power clipping
3D surround sound
Channel mixing
Noise gate with hysteresis window
Bass/Treble tone control
DC-blocking high-pass filter
Anti-pop design
Short circuit and over-temperature protection
I2C 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
Figure 3.4: Pin description