Vestel 17MB110 Schematic
MB110 IDTV
SERVICE MANUAL
Table of Contents
1. INTRODUCTION .......................................................................................................................................................... 2
2. T/T2/C/A Tuner (U103) .................................................................................................................................................. 3
3. S/S2 TUNER & DEMODULATOR (U90) OPTIONAL ............................................................................................... 5
4. AUDIO AMPLIFIER STAGES ...................................................................................................................................... 7
A. MAIN AMPLIFIER (U62)(6-8-10 W option) ...................................................................................... ........................... 7
B. MAIN AMPLIFIER (U91)(2.5 W option) .................................................................................................................... 10
C. HEADPHONE AMPLIFIER (U85) ................................................................................................................................ 11
5. POWER STAGE ........................................................................................................................................................... 14
6. MICROCONTROLLER ............................................................................................................................................... 25
A. MSTAR MSD93F3PK2 (U95) ..................................................................................................................................... 25
7. 4Gb DDR3 SDRAM ..................................................................................................................................................... 31
A. Samsung K4B4G1646D (U72) ................................................................................................................................... 31
8. 4Gbit (256M x 8 bit) NAND Flash Memory ................................................................................................................ 32
A. MT29F4G08ABAEAWP (U80) ................................................................................................................................... 32
9. 16M-BIT [16M x 1] CMOS SERIAL FLASH EEPROM ............................................................................................ 34
A. KH25L1606EM2-12G Macronix SPI Flash (U81) ....................................................................................................... 34
10. USB Interface ................................................................................................................................................................ 36
A. CY7C65642 (U73) ..................................................................................................................................................... 36
11. CI Interface ................................................................................................................................................................... 38
12. Software Update ............................................................................................................................................................ 39
A. Main SW update ...................................................................................................................................................... 39
13. Troubleshooting ............................................................................................................................................................ 39
A. No Backlight Problem .............................................................................................................................................. 39
B. CI Module Problem ..........................................................................................................
C. StayIng In Stand-by Mode ........................................................................................................................................ 42
D. IR Problem ................................................................................................................................................................ 43
E. Keypad Touchpad Problems .................................................................................................................................... 43
F. USB Problems ............................................................................................................... ............................................ 44
........................................ 41
G. No Sound Problem ................................................................................................................................................... 44
H. Standby On/Off Problem ......................................................................................................................................... 45
I. No Signal Problem .................................................................................................................................................... 46
14. Service Menu Settings .................................................................................................................................................. 48
15. General Block Diagram ................................................................................................................................................ 53
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1. INTRODUCTION
17MB110 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 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
Mılti-purpose CPU for OS and multimedia
Peripheral and power management
Embedded DRAM
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 PC input(Common)
3 HDMI input
1 Common interface(Common)
1 Optic/ Coax S/PDIF output
1 Headphone(Common)
2 USB(1x common, 1x optional) and 2x internal USB for Wifi/Bluetooth
1 Ethernet-RJ45
1 External Touchpad/Keyboard/Magic Button
1 DVD(Optional)
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2. T/T2/C/A TUNER (U103)
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 interferance,
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
Analog TV: NTSC, PAL/SECAM
Digital TV: ATSC/QAM, DVB-T2/T/C2/C, ISDB-T/C, DTMB
1.7 MHz, 6MHz, 7MHz, 8MHz and 10MHz 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
No balun, SAW filters, or external inductors required
Increased ESD protection on 4pins
Best-in-class real-world reception
Lowest phase noise
High Wi-Fi and LTE immunity
Low power consumption
3.3 V and 1.8 V power supplies
Integrated 1.8 V LDO for 3.3 V single-supply operation
Integrated power-on reset circuit
Standard CMOS process
3x3 mm, 24-pin QFN package
RoHS compliant
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Figure: Pin description
4
Table: Pin functions
3. S/S2 TUNER & DEMODULATOR (U90) OPTIONAL
Description
The M88RS6000 is highly single-Chip DVB-S2/S receiver. The device is consisting of tuner, a demodulator
and an LNB controller. It is fully compliant with the DVB-S2 and DVB-S standards by supporting QPSK,
(PSK, 16APSK and 32APSK demodulator schemes.)
The tuner is the device an RF signal in the frequency range from 950 MHz to 2150 MHz and down-convert
the signal directly to analog baseband signal, which will be converted to a digital signal in the advanced ADC.
After the ADC, the digital signal will be demodulated in the demodulator, related errors generated during
transmission will be corrected at this stage and finally an MPEG transport stream will be delivered in serial,
parallel or DVB-CI format.
5
Figure: Pin description
Features
6
4. AUDIO AMPLIFIER STAGES
A. MAIN AMPLIFIER (U62)(6-8-10 W OPTION)
Description
AD82587D is a digital audio amplifier capable of driving a pair of 8 ohm, 20W or a single 4ohm, 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, 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 I
PSNR & DR(A-weighting) Loudspeaker: 97dB (PSNR), 105dB (DR) @ 24V
Multiple sampling frequencies (Fs)
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S, Left-alignment and Right-alignment data format
o 32kHz / 44.1kHz / 48kHz and
o 64kHz / 88.2kHz / 96kHz and
o 128kHz/176.4kHz/192kHz
System clock = 64x, 128x, 256x, 384x, 512x, 768x,1024x Fs
o 256x~1024x Fs for 32kHz / 44.1kHz / 48kHz
o 128x~512x Fs for 64kHz / 88.2kHz / 96kHz
o 64x~256x Fs for 128kHz /176.4kHz/192kHz
Supply voltage
o 3.3V for digital circuit
o 10V~26V for loudspeaker driver
Loudspeaker output power for Stereo@ 24V
o 10W x 2ch into 8_ @ 0.16% THD+N
o 15W x 2ch into 8_ @ 0.18% THD+N
o 20W x 2ch into 8_ @ 0.24% THD+N
Loudspeaker output power for Mono@ 24V
o 20W x 1ch into 4_ @ 0.17% THD+N
o 30W x 1ch into 4_ @ 0.2% THD+N
o 40W x 1ch into 4_ @ 0.24% THD+N
Sounds processing including:
o Volume control (+24dB~-103dB, 0.125dB/step)
o Dynamic range control
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o Power clipping
o Channel mixing
o User programmed noise gate with hysteresis window
o 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
8
Figure: Pin description
Figure: Functional Block Diagram
Table: Absolute Maximum Ratings
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Table: Recommended Operating Conditions
B. MAIN AMPLIFIER (U91)(2.5 W OPTION)
Description
The AD52010 is a 3.0W stereo, filter-less class-D audio amplifier. Operating with 5.0V loudspeaker driver
supply, it can deliver 3.0W output power into 4 ohm loudspeaker within 10% THD+N or 2.6W at 1% THD+N.
The AD52010 is a stereo audio amplifier with high efficiency and suitable for the notebook computer, and
portable multimedia device.
Features
Supply voltage range: 2.5 V to 5.5 V
Support single-ended or differential analog input
Low Quiescent Current
Low Output Noise
Low shut-down current
Short power-on transient time
Internal pull-low resistor on shut-down pins
Short-circuit protection
Over-temperature protection
Loudspeaker power within 10% THD+N
o 1.78W/ch into 8 ohm loudspeaker
o >3W/ch into 4 ohm loudspeaker
Loudspeaker efficiency
o 93% @ 8 ohm, THD+N=10%
o 85% @ 4 ohm, THD+N=10%
E-TSSOP-14L package
Integrated Feedback Resistor of 300kW
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Figure: Pin description
Table:Pin functions
Table: Recommended operating conditions
C. HEADPHONE AMPLIFIER (U85)
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. The AD22657B has under voltage protection to
prevent POP noise. Build-in shutdown control and de-pop control sequence also help AD22657B to be a pop-
less device.
The AD22657B is available in a 10-pin MSOP package.
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Features
Operation Voltage: 3V to 3.6V
Cap-less Output
o Eliminates Output Capacitors
o Improves Low Frequency Response
o Reduces POP/Clicks
Low Noise and THD
o Typical SNR 107dB
o Typical Vn 7uVrms
o Typical THD+N < 0.02%
Maximum Output Voltage Swing into 2.5k Load
o 2Vrms at 3.3V Supply Voltage
Single-ended Input
External Gain Setting from 1V/V to 10V/V
Fast Start-up Time: 0.5ms
Integrated De-Pop Control
External Under Voltage Protection
Thermal Protection
Less External Components Required
+/-8kV IEC ESD Protection at line outputs
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Figure: Pin description
Table: Pin functions
Table: Recommended operating conditions
13
5. POWER STAGE
Power socket is used for taking voltages which are 12V_stby and 24V (VDD_Audio for 10W option). These
voltages are produced in power card. Also socket is used for giving dimming, backlight and stand-by signals
with power card. It is shown in figure.
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Figure: Power socket and power options
List of the components are:
SW1(Q56) → NTGS3446
SW2(Q44) → FDC642P
STP1(U63) → RT7278G(12V panel option)
STP1(U63) → TPS54528(5V panel option)
STP2(U102) → TPS54528
STP3(U70) → TPS54329
STP4(U100) → RT6213
LDO1(U94) → LM1117
LDO3(U89) → APL5910
LDO4(U65) → APL5910
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FDC642P
Description and Features
NGTS3446
Features
Ultra Low RDS(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
Figure: Pin description
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Figure: Pin description
TPS54528
Description
The TPS54528 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54528 enables
system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low
component count, low standby current solution. The main control loop for the TPS54528 uses the D-CAP2™
mode control that provides a fast transient response with no external compensation components. The adaptive
on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™
operation at light loads. Eco-mode™ allows the TPS54528 to maintain high efficiency during lighter load
conditions. The TPS54528 also has a proprietary circuit that enables the device to adopt to both low equivalent
series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors.
The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V
and 6.0 V. The device also features an adjustable soft start time. The TPS54528 is available in the 8-pin DDA
package, and designed to operate from –40 C to 85 C.
Features
D-CAP2™ Mode Enables Fast Transient Response
Low Output Ripple and Allows Ceramic Output Capacitor
Wide VIN Input Voltage Range: 4.5 V to 18 V
Output Voltage Range: 0.76 V to 6.0 V
Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications
o 65 mΩ (High Side) and 36 mΩ (Low Side)
High Efficiency, less than 10 μA at shutdown
High Initial Bandgap Reference Accuracy
Adjustable Soft Start
Pre-Biased Soft Start
17
650-kHz Switching Frequency (fSW)
Cycle By Cycle Over Current Limit
Auto-Skip Eco-mode™ for High Efficiency at Light Load
Figure: Pin description
Table: Pin functions
RT7278
Description
The RT7278 is a synchronous step down converter with Advanced Constant On-Time (ACOTTM) mode
control. The ACOTTM provides a very fast transient response with few external components. The low
impedance internal MOSFET supports high efficiency operation with wide input voltage range from 4.5V to
17V. The proprietary circuit of the RT7278 enables to support all ceramic capacitors. The output voltage can be
adjustable between 0.8V and 8V. The soft-start is adjustable by an external capacitor.
Features
ACOT
TM
Mode Enables Fast Transient Response
4.5V to 17V Input Voltage Range
3A Output Current
60mΩ Internal Low Site N-MOSFET
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