Vestel 17MB70 Schematic

SERVICE MANUAL

17MB70

1

DATE VERSION CHANGE RELEASED BY

14.10.2010 V1.0 Draft Emre YILDIZILI

2

İçindekiler

1. INTRODUCTION ............................................................................................................................... 5

2. TUNER .............................................................................................................................................. 6

3. AUDIO AMPLIFIER STAGES .............................................................................................................. 8

A. MAIN AMPLIFIER (TPA3110) ........................................................................................................ 8

B. LINE-OUT and HEAD-PHONE AMPLIFIER STAGE (CXA3813N) ................................................... 11

C. SUBWOOFER AMPLIFIER STAGE (TPA3112) .............................................................................. 12

4. POWER STAGE ............................................................................................................................... 14

5. MICROCONTROLLER(Broadcom) ................................................................................................... 21

6. SATELLITE RECEIVER (Broadcom) .................................................................................................. 24

7. VIDEO BACK-END PROCESSOR (Trident) ....................................................................................... 25

8. FPGA (Spartan-3E) ......................................................................................................................... 27

9. PIXELLENCE II ................................................................................................................................. 28

10. 1Gb F-die DDR2-1066 SDRAM (U41-U42-U8-U9) ...................................................................... 29

11. 32M x 16 bit DDRII Synchronous DRAM (U28-U29) .................................................................. 31

12. 4Gbit NAND Flash Memory (U35) ............................................................................................. 34

13. 128Mbit NAND Flash Memory (U17) ........................................................................................ 36

14. USB Interface ............................................................................................................................. 37

15. CI Interface ................................................................................................................................ 38

16. DVB-C Demodulator .................................................................................................................. 38

17. DVB-C/T2 Demodulator ............................................................................................................. 41

18. LOW POWER&CEC MICROCONTROLLER ................................................................................... 47

19. HDMI SWITCH ............................................................................................................................ 48

20. LNB supply and control IC ......................................................................................................... 53

21. Software Update ....................................................................................................................... 54

22. Troubleshooting ........................................................................................................................ 54

A. No Backlight Problem ............................................................................................................ 54

B. CI Module Problem ............................................................................................................... 57

C. Staying in Stand-by Mode ..................................................................................................... 58

D. IR Problem ............................................................................................................................ 59

E. Keypad Touchpad Problems.................................................................................................. 60

F. USB Problems ....................................................................................................................... 61

G. No Sound Problem ................................................................................................................ 61

3

H. Standby On/Off Problem ....................................................................................................... 61

İ. No Signal Problem ................................................................................................................ 62

23. Service Menu Settings ............................................................................................................... 62

24. General Block Diagram .............................................................................................................. 67

4

1. INTRODUCTION

17MB70-2 mainboard is based on Broadcom concept IC. This IC combines DVB-T COFDM
terrestrial and PAL/SECAM demodulators, HDMI receivers, a transport processor, a digital
audio processor, graphics processing, Ethernet MAC and PHY, digital processing of analog
video and audio, analog video digitizer and DAC functions, stereo high-fidelity audio DACs,
a 400-MHz dual-threaded MIP processor, and a peripheral control unit providing a variety of
television control functions. This IC also features an advanced video decoder capable of
supporting high-definition AVC, VC-1, and DVB-T MPEG-2 streams.

Main IC Features:

• Advanced multiformat decoder supporting the following:

- H.264/AVC Main and High Profile to Level 4.1 (HD), Level 3.1 (SD)

- HD/SD AVS Jizhun Profile Levels 2.0, 4.0, and 6.0

- VC-1 Advanced Profile @ Level 3, simple and main profiles

- HD/SD MPEG-2 Main Profile at Main and High levels

- MPEG still image decode

- HD DivX® 3.11/4.11/5.x/6x/Home Theater

• 3D/2D OpenGL® ES 1.0- compliant graphics core

• Integrated Video Processing:

- 3D Color management

- Digital, Analog, and Mosquito Noise Reduction

- 1080i motion adaptive deinterlacing with 3:2/2:2 pull-down

- True 10-bit video carried through system

• Dual HDMI 1.3a receivers

• Extensive audio support:

- AAC+ Level 2, AAC-HE

- Dolby® Digital, Dolby Digital Plus, Trusurround XT®

- MPEG I layers 1, 2, and 3 (MP3)

- Windows Media® and Windows Media Pro audio

- Audio DACs, input switch, and equalizer

• Ethernet MAC and PHY

• Integrated DVB-T COFDM terrestrial demodulator:

- Standards compliance: ETSI EN 300 744, Nordig Unified v1.0.3, DTG D-Book 5
compliant

- Excellent Doppler performance

- Active impulse noise suppression

• Integrated PAL/SECAM Demodulator

• PAL decoder with a 3D/2D comb

• Direct PC input support up to 1600 x 1200 UXGA

• Integrated dual-link LVDS transmitters

• Dual USB 2.0

• A 400-MHz 32-bit MIPS dual CPU with two 32-KB instruction caches
and a combined 64-KB data cache with 128-KB L2 cache

Sound system output is supplying 2x8W (10%THD) for stereo 8

Ω speakers

5

Supported peripherals are:

• 1 RF input VHF I, VHF III, UHF @ 75Ohm(Common)

• 1 Side AV (CVBS, R/L_Audio)

• 2 SCART socket(Common)

• 1 YPbPr (Common)

• 1 Side S-Video(Common)

• 1 PC input(Common)

• 4 HDMI 1.3 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)

• 2 USB(Common)

• 1 Bluray/DVD(Optional)

• 1 Ethernet-RJ45 (Common)

• 1 External Touchpad(Common)

2. TUNER

FT 2112/3/8/9 are newly developed Half-NIM modules designed for both digital
(DVB-T / T2 and DTMB for terrestrial China) and analog TV reception in compliance with
the European ATV standards for analogue, as well as with the terrestrial standard ETS 300
744 for DVB-T and the new terrestrial standard ETS 302 755 for DVB-T2. It consists of a 3­band RF tuner, which receives RF signal and down-converts it to an IF frequency of 36MHz
for digital and 38.9MHz for analog IF. The analogue IF output can directly drive a SAW
filter. A digital IF Stage, which consists of one SAW filter & gain-controllable IF that offers a
sufficient output level to be connected directly to an A/D converter.

In active antenna option, the following circuit are used. ANT_CTRL pin is controlled by
microcontroller. If ANT_CTRL is low, ANT_PWR will be low. If ANT_CTRL is high,
ANT_PWR will be high. OVER_CUR_DETECT pin is a monitor for short circuit in antenna.
OVER_CUR_DETECT is low, ANT_CTRL will be low, so ANT_PWR will be low. Finally,
short circuit protection is done by circuits and microcontroller.

6

Active Antenna Circuit

1.1. Features of FT2112

• Digital DVB-T T2, DTMB & analogue (48.25MHz to 863.25MHz) reception

• Single 5V supply voltage only

• Built-in 5-33V DC-DC converter

• Single power supply to the RF tuner & IF VGA amplifier section

• Bus Control switch-able RF AGC function:

a) Wide Band AGC for optimum strong signal performance

b) Conventional AGC for optimum analog reception

• RF AGC information via I2C Bus

• Tuner power standby mode via I2C Bus

• Small size (56 mm x 29 mm x 10 mm)

• I2C (SDA & SCL) bus control interface

• ROHS compliant

7

1.2. Tuner Pinning

3. AUDIO AMPLIFIER STAGES

A. MAIN AMPLIFIER (TPA3110)

a. General Description

17MB70 uses TPA 3110 15-W filter-free stereo Class-D audio power amplifier for main
audio output. The TPA3110D2 is a 15-W (per channel) efficient, Class-D audio power
amplifier for driving bridged-tied stereo speakers. Advanced EMI Suppression Technology
enables the use of inexpensive ferrite bead filters at the outputs while meeting EMC
requirements. SpeakerGuard™ speaker protection circuitry includes an adjustable power
limiter and a DC detection circuit. The adjustable power limiter allows the user to set a
"virtual" voltage rail lower than the chip supply to limit the amount of current through the
speaker. The DC detect circuit measures the frequency and amplitude of the PWM signal and
shuts off the output stage if the input capacitors are damaged or shorts exist on the inputs.

8

The TPA3110D2 can drive stereo speakers as low as 4
TPA3110D2, 90%, eliminates the need for an external heat sink when playing music. The
outputs are also fully protected against shorts to GND, VCC, and output-to-output. The short­circuit protection and thermal protection includes an auto-recovery feature.

b. Features

• 15-W/ch into an 8-Ω Loads at 10% THD+N From a 16-V Supply

• 10-W/ch into 8-Ω Loads at 10% THD+N From a 13-V Supply

• 30-W into a 4-Ω Mono Load at 10% THD+N From a 16-V Supply

• 90% Efficient Class-D Operation Eliminates Need for Heat Sinks

• Wide Supply Voltage Range Allows Operation from 8 V to 26 V

• Filter-Free Operation

• SpeakerGuard™ Speaker Protection Includes Adjustable Power Limiter plus DC Protection

• Flow Through Pin Out Facilitates Easy Board Layout

• Robust Pin-to-Pin Short Circuit Protection and Thermal Protection with Auto Recovery
Option

• Excellent THD+N / Pop-Free Performance

Ω. The high efficiency of the

• Four Selectable, Fixed Gain Settings

• Differential Inputs

c. Absolute Ratings

9

d. Recommended Operating Conditions

e. Pin Functions

10

B. LINE-OUT and HEAD-PHONE AMPLIFIER STAGE (CXA3813N)

a. Functional Block Diagram

b. Absolute Ratings

c. Recommended Operating Conditions

11

d. Pin Functions

C. SUBWOOFER AMPLIFIER STAGE (TPA3112)

a. General Description

The TPA3112D1 is a 25-W efficient, Class-D audio power amplifier for driving a bridge tied
speaker. Advanced EMI Suppression Technology enables the use of inexpensive ferrite bead
filters at the outputs while meeting EMC requirements. SpeakerGuard speaker protection
system includes an adjustable power limiter and a DC detection circuit. The adjustable power
limiter allows the user to set a "virtual" voltage rail lower than the chip supply to limit the
amount of current through the speaker. The DC detect circuit measures the frequency and
amplitude of the PWM signal and shuts off the output stage if the input capacitors are
damaged or shorts exist on the inputs. The TPA3112D1 can drive a mono speaker as low as
4Ω. The high efficiency of the TPA3112D1, > 90%, eliminates the need for an external heat
sink when playing music. The outputs are fully protected against shorts to GND, VCC, and
output-to-output. The short-circuit protection and thermal protection includes an auto­recovery feature.

b. Features

• 25-W into an 8-Ω Load at < 0.1% THD+N Froma 24V Supply

• 20-W into an 4-Ω Load at 10% THD+N From a12-V Supply

• 94% Efficient Class-D Operation into 8-Ω LoadEliminates Need for Heat Sinks

• Wide Supply Voltage Range Allows Operationfrom 8 to 26 V

• Filter-Free Operation

• SpeakerGuard™ Speaker Protection IncludesAdjustable Power Limiter plus DC Protection

• Flow Through Pin Out Facilitates Easy BoardLayout

• Robust Pin-to-Pin Short Circuit Protection andThermal Protection with Auto-Recovery
Option

• Excellent THD+N/ Pop Free Performance

• Four Selectable, Fixed Gain Settings

• Differential Inputs

12

c. Absolute Ratings

d. Recommended Operating Conditions

e. Pin Functions

13

4. POWER STAGE

17MB70 general power managment
block diagram is shown below.
17PW26 power board is used in 32”
17MB70 TV sets.

3,3V stby, 5V stby, 3,3V, 5V, 12V,
24V and 33V can be generated by
PW26.

Below blocks are generated by step­downs and regulators on MB70
board.

14

Power Blocks on MB70:

Below blocks are generated by step-downs and regulators on MB70 board.

15

FAIRCHILD FAN2110 (U19-U20)

a) General Description

16

17

MP1583 (U38)

DESCRIPTION

The MP1583 is a step-down regulator with abuilt-in internal Power MOSFET. It achieves 3A
of continuous output current over a wide input supply range with excellent load and line
regulation.
Current mode operation provides fast transient response and eases loop stabilization.

18

Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. An
adjustable soft-start reduces the stress on the input source at startup. In shutdown mode the
regulator draws 20µA of supply current. The MP1583 requires a minimum number of
external components, providing a compact solution.

FEATURES

• 3A Output Current

• Programmable Soft-Start

• 100m

• Stable with Low ESR Output Ceramic Capacitors

• Up to 95% Efficiency

• 20µA Shutdown Mode

• Fixed 385KHz Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Wide 4.75V to 23V Operating Input Range

• Output Adjustable from 1.22V to 21V

• Under-Voltage Lockout

Ω Internal Power MOSFET Switch

MP2012 (U39)

The MP2012 is a fully integrated, internally compensated 1.2MHz fixed frequency PWM
step-down converter. It is ideal for powering portable equipment that runs from a single cell
Lithium-Ion (Li+) Battery, with an input range from 2.7V to 6V. The MP2012 can provide up
to 1.5A of load current with output voltage as low as 0.8V. It can also operate at 100% duty

19

cycle for low dropout applications. With peak current mode control and internal
compensation, the MP2012 is stable with ceramic capacitors and small inductors. Fault
condition protection includes cycle-by-cycle current limiting and thermal shutdown. MP2012
is available in the small 6-pin 3mmx3mm QFN package.

• 2.7-6V Input Operation Range

• Output Adjustable from 0.8V to VIN

µA Max Shutdown Current.

• 1

• Up to 95% Efficiency

• 100% Duty Cycle for Low Dropout Applications

• 1.2MHz Fixed Switching Frequency

• Stable with Low ESR Output Ceramic Capacitors

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Short Circuit Protection

• Available in 6-pin 3x3mm QFN

LM1117 (U21-U22-U23-U24)

20

5. MICROCONTROLLER(Broadcom)

BCM3556

a) General Description

The BCM3556 is the next generation of System-on-a-Chip (SoC) Digital Television (DTV)
products from Broadcom® with 1080p60 input and output capability targetedfor the EU
Market. It combines a high level of integration with best-of-class picture quality, enabling TV
manufacturers to reduce overall system cost (BOM) and improve picture quality, all with a
single SoC.

The BCM3556 combines DVB-T COFDM terrestrial and PAL/SECAM demodulators, two
DVI/HDMI receivers, a transport processor, a digital audio processor, 3D/2D graphics
processing, Ethernet MAC and PHY, digital processing of analog video and audio, analog
video digitizer and DAC functions, stereo high-fidelity audio DACs, a 400-MHz dual­threaded MIPS processor, and a peripheral control unit providing a variety of television
control functions. The BCM3556 also features an advanced video decoder
capable of supporting high-definition AVC, VC-1, and DVB-T MPEG-2 streams.

The integration of the DVB-T COFDM terrestrial demodulator reduces the overall cost of the
external tuner module, resulting in cost savings for the customer. The BCM3556also
integrates four 10-bit ADCs with integrated front-end analog muxing that accept four CVBS
inputs, three S-video inputs, three component inputs, one PC input, one full SCART input
with fast blanking, and one Sound IF (SIF) input at the same time without the requirement for
any off-chip muxing ICs. The BCM3556 offers two HDMI 1.3a receivers, a motion adaptive
deinterlacer, HD Analog Noise Reduction, and an analog video decoder with 3D comb for
PAL and Y/C separation for SECAM.

The multiformat video decoder in the BCM3556 is capable of supporting high-definition
AVC, VC-1, and DVB-T MPEG-2 streams. AVC support is up to High Profile Level 4.1.
New tools in the AVC Fidelity Range extensions are supported, including 8x8 transform and
spatial prediction modes and adaptive quantization matrix. The video decoder also supports
high-definition VC-1 (Advanced Profile Level 3, Main, and Simple profiles) and DVB­Tcompliant MPEG-2, Main Profile at Main and High Levels. The BCM3556 has an advanced
programmable audio processor capable of decoding a broad range of formats including Dolby
Digital, Dolby Digital Plus, AAC 5.1, AAC+ Level 2, AAC+ Level 4, WMA, and MPEG-1
Layer 1, 2, and 3 with simultaneous pass-through support.
The BCM3556 also supports 3D SRS Audio and includes an analog audio decoder for BTSC
and A2 formats. The BCM3556 also integrates an analog audio switch that accepts six stereo
inputs. In addition, the SoC supports SPDIF and I2S inputs. One SPDIF, two I2S, and three
analog audio outputs are available.

The SoC family also has an integrated advanced Picture Enhancement Processor (PEP) to
improve sharpening and perform picture post-processing functions (e.g., autoflesh, green
boost, black and blue stretch). The PEP engine is fully programmable and can be optimized
by the TV manufacturer to meet their respective quality requirements. Also integrated is a
video encoder for NTSC and an advanced 2D/3D graphics for OSD acceleration.

21

The BCM3556 supports direct PC inputs up to UXGA 1600x1200 formats with autophase
and automode detection and supports dual LVDS outputs to support 1080p60 panels.

The BCM3556 integrates a 400-MHz 32-bit MIPS dual CPU with two 32-KB
instructioncaches and a combined 64-KB data cache with a 128-KB L2 cache, and a 32-bit
800/1066-MHz DDR2. The BCM3556 also supports an 8-bit external NAND Flash interface
and SPI Flash interface for booting. Integrated peripherals include two USB2.0 ports, three
UARTs, controllers for SPI, BSC, keypad, LED and IR Tx/Rx, and an Ethernet port with
MAC and integrated PHY.

The BCM3556 is available in several package options: WXGA and FHD, PIP and non-PIP, or
MPEG-only and combined AVC/MPEG-2.

b) Features

• Advanced multiformat decoder supporting the following:

- H.264/AVC Main and High Profile to Level 4.1 (HD), Level 3.1 (SD)

- HD/SD AVS Jizhun Profile Levels 2.0, 4.0, and 6.0

- VC-1 Advanced Profile @ Level 3, simple and main profiles

- HD/SD MPEG-2 Main Profile at Main and High levels

- MPEG still image decode

- HD DivX® 3.11/4.11/5.x/6x/Home Theater

• 3D/2D OpenGL® ES 1.0- compliant graphics core

• Integrated Video Processing:

- 3D Color management

- Digital, Analog, and Mosquito Noise Reduction

- 1080i motion adaptive deinterlacing with 3:2/2:2 pull-down

- True 10-bit video carried through system

• Dual HDMI 1.3a receivers

• Extensive audio support:

- AAC+ Level 2, AAC-HE

- Dolby® Digital, Dolby Digital Plus, Trusurround XT®

- MPEG I layers 1, 2, and 3 (MP3)

- Windows Media® and Windows Media Pro audio

- Audio DACs, input switch, and equalizer

• Ethernet MAC and PHY

• Integrated DVB-T COFDM terrestrial demodulator:

- Standards compliance: ETSI EN 300 744, Nordig Unified v1.0.3, DTG D-Book 5
compliant

- Excellent Doppler performance

- Active impulse noise suppression

• Integrated PAL/SECAM Demodulator

• PAL decoder with a 3D/2D comb

• Direct PC input support up to 1600 x 1200 UXGA

• Integrated dual-link LVDS transmitters

• Dual USB 2.0

• A 400-MHz 32-bit MIPS dual CPU with two 32-KB instruction caches and a combined 64
KB data cache with 128-KB L2 cache

22

c) BCM3556 - Block Diagram

23

6. SATELLITE RECEIVER (Broadcom)

BCM4505

a) General Description

The BCM4505 is a fully integrated satellite receiver single-chip solution targeted at
multituner advanced modulation satellite receiver systems and ideally suited for new
generation satellite receivers and integrated multifunction Home Media Centers. The
BCM4505 integrates a CMOS tuner and advanced modulation decoder supporting DVB-S2
Broadcast, DVB-S, DIRECTV, and 8PSK Turbo applications. The highly integrated tuner
section is based on existing volume-production Broadcom technologies and a direct­conversion technology to reduce external components and increase performance.The
BCM4505 is designed to support the full 1-45 Msps DVB operating range with support for
250 to 2150 MHz input frequencies. It contains two 8-bit A/D converters, all-digital variable­rate QPSK/8PSK receivers, an advanced modulation LDPC/BCH and Turbo FEC decoder,
and a DVB-S compliant FEC decoder. All required RAM is integrated and all required clocks
are generated on-chip from a single reference crystal. The baseband IQ analog waveforms
from the tuner section are sampled by the integrated 8-bit A/D converters and resampled by
the integrated interpolative digital filter banks.

Optimized soft decisions are then fed into either a DVB-S-compliant FEC decoder, or an
advanced-modulation DVB-S2 LDPC/BCH or Turbo decoder. The final error-corrected
output is delivered in MPEG-2 transport format. The output clock is generated by an on-chip
PLL for low-jitter operation and glueless integration with Broadcom's high definition audio
video subsystems, such as the BCM7401 and the BCM7402. The communication link
sections include an on-chip microcontroller for all system configuration, acquisition, control,
monitoring and diagnostics functions, as well as an integrated DiSEqC 2.x controller for 2­way communication with an LNB, and a single FSK transceiver for communication with
ODUs that support multiple LNB configurations over a single coax connection.The
BCM94505 reference design is available for easy system design and testing using the
BCM4505 advanced modulation receiver chip.

b) Features

• Dual direct conversion satellite tuners

• Direct conversion architecture in standard CMOS process

• Supports QPSK and 8PSK demodulation

• Input frequency range: 250 to 2150 MHz

• Integrated 8-bit A/D converters

• Integrated advanced demodulation decoder

• DVB-S2 Broadcast, DVB-S, 8PSK Turbo

• Data Rates:

• DVB-S: 1-45 Msps

• DVB-S2: 1-45 Msps

• 8PSK Turbo: 2-30 Msps

• Code Rates: 1/4, 1/3, 2/5, 1/2,3/5, 2/3, 3/4 , 5/6, 7/8, 8/9, 9/10

• Integrated DiSEqC 2.x transceivers

24

• On-chip microcontroller for acquisition and tracking

• 128-pin epLQFP package

c) BCM4505 - Block Diagram

7. VIDEO BACK-END PROCESSOR (Trident)

PNX5120EH

a) General Description

The PNX5120EH is an advanced video picture improvement IC and the world's first solution,
NXP’s Motion Accurate Picture Processing (MAPP), to combine movie judder cancellation,
motion sharpness and vivid color management in a single device. Aimed primarily at digital
and hybrid flat panel televisions in the mid-end and high-end European,Asian and U.S.
consumer markets, it complies with relevant industry standards.LCD TVs represent a huge
and growing market, and the PNX5120EH offers manufacturers a unique combination of
richer color, dynamic motion, sensational sharpness, deep contrast, and full HD resolution.
Moreover, you can easily tailor that balance via the Automatic Picture Control tool (delivered
by NXP as part of a separate System Design-in Toolkit) to meet your own image quality
requirements.

b) Features

• Single 27 MHz crystal clock input for all internal generated clocks

• Three TriMedia TM3271 400 MHz, 32-bit VLIW media-processing cores with:

o five instructions per clock cycle
o 32 kB instruction cache
o 64 kB data cache

• Integrated DDR2 SDRAM controller, 32-bit wide, up to 366 MHz clock (DDR2-800),

supporting 32 MB, 64 MB, 128 MB, and 256 MB single-rank memory configurations

• Separately licensed, the PNX5120EH comes with an easy-to-use System Design-in

Toolkit (SDT), which includes the NXP Picture Quality Tuning Tool, firmware image
containing the NXP proprietary Picture Improvement features, and GPL-licensed U­Boot Bootloader software.

25

• DDR2-400 to DDR2-800 data rates supported

• PCI/XIO (V2.2) operating at 33 MHz

• Two UARTs

• Two I2C DMA interfaces (100 kHz/400 kHz); the second I2C can be used as a

debugging interface

• 16 GPIO pins

• Five PWM outputs

• Support for 8-bit NOR flash up to 64 MB

• Support for 8-bit/16-bit NAND flash up to 128 MB

c) PNX5120EH - Block Diagram

26