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Vestel
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17MB61
Schematic
69 pgs5.6 Mb0

Vestel 17MB61 Schematic

TABLE OF CONTENTS
1. INTRODUCTION...................................................................................................................... 4
1.1. General Block Diagram.................................................................................................. 5
1.2. MB61 Placement of Blocks............................................................................................ 6
1. TUNER(TU102)......................................................................................................................... 7
1.1. General description of Samsung DTOS403LH121B:.................................................... 7
1.2. Features of DTOS403LH121B: ..................................................................................... 7
1.3. Pinning: .......................................................................................................................... 8
2. SAW FILTER – Audio – Epcos K9656M(Z101) ...................................................................... 9
2.1. Standart........................................................................................................................... 9
2.2. Features .......................................................................................................................... 9
2.3. Pin configuration ............................................................................................................ 9
2.4. Frequency response ........................................................................................................ 9
3. SAW FILTER – Video – Epcos K3958M(Z102) .................................................................... 10
3.1. Standart......................................................................................................................... 10
3.2. Features ........................................................................................................................ 10
4. AUDIO AMPLIFIER STAGE WITH MAX9736 ................................................................... 12
4.2. Features ........................................................................................................................ 12
4.3.1. Electrical Characteristics.......................................................................................... 13
4.4. Pinning ......................................................................................................................... 16
5. POWER STAGE ...................................................................................................................... 17
6. MICROCONTROLLER – MSTAR(U157) ............................................................................. 19
MSD9WB7GX-LF-2.................................................................................................................... 19
6.1. MSTAR Block Diagram............................................................................................... 22
7. CI INTERFACE....................................................................................................................... 23
7.1 CI Interface Power Switch ........................................................................................... 23
8. USB INTERFACE ................................................................................................................... 24
9. DDR2 SDRAM 8M × 4 BANKS × 16 BIT (W9751G6JB) (U154, U155) ............................. 24
9.2. Features ........................................................................................................................ 25
9.4. Pinning ......................................................................................................................... 26
Headphone Amplifier-TDA1308 ................................................................................................. 27
Demodulators ............................................................................................................................... 28
MSB1210 ................................................................................................................................. 28
MSB1222 ................................................................................................................................. 30
CXD2820D............................................................................................................................... 31
10. SERVICE MENU SETTINGS............................................................................................. 33
10.3. Options ......................................................................................................................... 36
10.4. Tuning Settings ............................................................................................................ 38
10.6. Diagnostic..................................................................................................................... 40
10.7. USB Operations............................................................................................................ 40
11. SOFTWARE UPDATE........................................................................................................ 41
12. TROUBLESHOOTING ....................................................................................................... 42
12.1. No Backlight Problem.................................................................................................. 42
12.3. Led Blinking Problem .................................................................................................. 45
12.4. IR Problem ................................................................................................................... 46
12.5. Keypad Touchpad Problems ........................................................................................ 46
12.7. No Sound Problem ....................................................................................................... 48
DVD Problems ......................................................................................................................... 49
12.10. No Signal Problem ................................................................................................... 50
1. INTRODUCTION
17MB61 mainboard is driven by MSD9WB7GX-LF-2. This IC is capable of handling Video and audio processing, Scaling-Display processing, 3D comb filter, OSD and text processing, LVDS transmitting, channel and MPEG2/4 decoding.
TV supports PAL, SECAM, NTSC colour standards and multiple transmission standards as B/G, D/K, I/I’, and L/L’ including German and NICAM stereo. Also DVB T, DVB-C are supported external demodulators.
Sound system output is supplying max. 2x8W (10%THD) for stereo 8
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 PC input(Common) 4 HDMI 1.3 input(2 HDMI inputs are common, 4 inputs are optional) 1 S/PDIF output(Common) 1 Headphone(Common) 1 Common interface(Common) 2 USB(Common) 1 DVD(Optional) 1 On-board Keypad(Optional) 1 External Keypad(Optional) 1 External TouchPad(Optional)
Ω speakers.
1.1. General Block Diagram
1.2. MB61 Placement of Blocks
1. TUNER(TU102)
A horizontal mounted and Digital Half-Nim tuner is used in the product, which covers 3 Bands(From 48MHz to 862MHz for COFDM, from 45.25MHz to 863.25MHz for CCIR CH). The tuning is available through the digitally controlled I2C bus (PLL). Below you will find info about the tuner.
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.
1.1. General description of Samsung DTOS403LH121B:
The Tuner covers 3 Bands(from 48MHz to 862MHz for COFDM, from 45.25MHz to 863.25MHz for CCIR CH). Band selection and Tuning are performed digitally via the I2C bus.
1.2. Features of DTOS403LH121B:
Receiving System: This TUNER is designed to cover the air channels in VHF and UHF,
compliant with DVB-T standard. and It covers all Analog channels from 48.25MHz to
863.25MHz
Receiving Channel (Digital, Center frequency):
VHF Low CH. E2 ~ S10 ( 50.5MHz ~ 170.5MHz ) VHF High CH. E5 ~ S41 ( 177.5MHz ~ 466 MHz )
UHF CH. E21 ~ E69 ( 474 MHz ~ 858 MHz )
1
Ant Power
Active Antenna Power
3
RF AGC
RF AGC (internal or external mode)
4CLI2C Serial Clock
7
BT(T.P)
+33V, within DC/DC
circuit
9
IF AGC
Control voltage for the IF AGC
11
IF OUT
-
Output 1 of the IF Amplifier
12
AIF Output
IF output of the Analog BroadBand
Receiving Channel (PAL, Picture carrier frequency):
VHF Low CH. E2 ~ S10 ( 48.25MHz ~ 168.25MHz ) VHF High CH. E5 ~ S41 ( 175.25MHz ~ 463.25MHz ) UHF CH. E21 ~ E70 ( 471.25MHz ~ 863.25MHz )
Intermediate Frequency:
Digital(center) DVB-T (36.167 MHz) Digital(center) DVB-C (36.125 MHz) Analog(picture) 38.9 MHz
Input Impedance: 75Ω, UnbalancedBand Change-Over System
PLL Control System
Tuning System
Electronic Tuning System With PLL
Internal(or External) RF AGC function
Built in wideband AGC detector with 6 programmable take-over points
1.3. Pinning:
Terminal
Pin no.
Name Pin Description
2 B+ +5V, Supply Voltage (Preamplifier, DC/DC)
5 DA I2C Serial Clock 6 BP +5V, Supply Voltage (RF Amp, PLL, IF Amp)
8 AS I2C Address Selection of the PLL
10 IF OUT + Output 2 of the IF Amplifier
2. SAW FILTER – Audio – Epcos K9656M(Z101)
2.1. Standart
B/G D/K I L/L’
2.2. Features
TV IF audio filter with two channelsChannel 1 (L’) with one pass band for sound carriers at 40,40 MHz (L’) and 39,75 MHz (L’-
NICAM)
Channel 2 (B/G,D/K,L,I) with one pass band for sound carriers between 32,35 MHz and 33,40
MHz
2.3. Pin configuration
1 Input 2 Switching input 3 Chip carrier - ground 4 Output 5 Output
2.4. Frequency response
3. SAW FILTER – Video – Epcos K3958M(Z102)
3.1. Standart
B/G D/K I L/L’
3.2. Features
TV IF filter with Nyquist slopes at 33.90 MHz and 38.90 MHz Constant group delay
Pin configuration:
1 Input 2 Input - ground 3 Chip - carrier ground 4 Output 5 Output
3.3. Frequency response
4. AUDIO AMPLIFIER STAGE WITH MAX9736
4.1. General Description
The MAX9736A/B Class D amplifiers provide high-performance, thermally efficient amplifier solutions. The MAX9736A delivers 2 x 15W into 8
into a 4Ω load. The MAX9736B delivers 2 x 6W into 8Ω loads or 1 x 12W into a 4Ω load. These
devices are pinfor-pin compatible, allowing a single audio design to work across a broad range of platforms, simplifying design efforts, and reducing PCB inventory. Both devices operate from 8V to 28V and provide a high PSRR, eliminating the need for a regulated power supply. The MAX9736 offers up to 88% efficiency at 12V supply. Pin-selectable modulation schemes select between filterless modulation and classic PWM modulation. Filterless modulation allows the MAX9736 to pass CE EMI limits with 1m cables using only a low-cost ferrite bead and capacitor on each output. Classic PWM modulation is optimized for best audio performance when using a full LC filter. A pin-selectable stereo/mono mode allows stereo operation loads. In mono mode, the right input op amp becomes available as a spare device, allowing flexibility in system design. Comprehensive click-and-pop reduction circuitry minimizes noise coming into and out of shutdown or mute. Input op amps allow the user to create summing amplifiers, lowpass or highpass filters, and select an optimal gain. The MAX9736A/B are available in 32-pin TQFN packages and specified over the -40°C to +85°C temperature range.
Ω loads, or 1 x 30W
into 8Ω loads or mono operation into 4Ω
4.2. Features
Wide 8V to 28V Supply Voltage Range
♦ Spread-Spectrum Modulation Enables Low EMI Solution ♦ Passes CE EMI Limits with Low-Cost Ferrite Bead/Capacitor Filter ♦ Low BOM Cost, Pin-for-Pin Compatible Family ♦ High 67dB PSRR at 1kHz Reduces Supply Cost ♦ 88% Efficiency Eliminates Heatsink ♦ Thermal and Output Current Protection ♦ < 1μA Shutdown Mode ♦ Mute Function ♦ Space-Saving, 7mm x 7mm x 0.8mm, 32-Pin TQFN
Package
4.3. Absolute Ratings
4.3.1. Electrical Characteristics
4.4. Pinning
5. POWER STAGE
17MB61 General power management block diagram is shown below:
Voltage Total Current
3V3 925mA
3V3 stby 10mA
5V 2800mA 1500mA PANEL
5V stby 20mA
1V8 800mA
1V26 1060mA
12V 1500mA PANEL 24V 8250mA BACKLIGHT
Table 9: Power Consumption
1) These values calculated from max. ratings of existing panels. Meaning values will be lower than calculated values.
2) Total consumption value does not contain the CCFL consumption.
Power ICs
Power Domain
6. MICROCONTROLLER – MSTAR(U157)
MSD9WB7GX-LF-2
GENERAL DESCRIPTION
The MSD9WB7GX-2 is a highly integrated controller IC for LCD/PDP DTV applications with resolutions up to WUXGA (1920x1200). It is configured with an integrated triple-ADC/PLL, a multi-standard TV video and audio decoder, a motion adaptive video de-interlacer, a scaling engine, the MStarACE-3 color engine, an advanced 2D graphics engine, a transport processor, a high-definition (HD) MPEG video decoder, a high-definition (HD) H.264 video decoder, a Real Video decoder, a JPEG video decoder, a MPEG-4 decoder, and a 24-bit DSP for MPEG audio decoding, a DVI/HDCP/HDMI receiver, and a peripheral control unit providing a variety of HDTV control functions.
For digital TV application, the MSD9WB7GX-2 comprises an MPEG-2 transport processor with advanced section filtering capability, an MPEG-2 (MP@HL profile) video decoder, a MPEG-4 decoder, a H.264 video decoder, and an audio DSP decoder for MPEG audio streams, MPEG layer I and II digital audio decoder with analog audio outputs that are designed to support existing and future DVB-T programs while handling conditional access. Furthermore, it is also possible to decode JPEG, Real Video streams, and MP3 formats from external sources such as USB interface.
For analog TV, the MSD9WB7GX-2 includes NTSC/PAL/SECAM multi-standard video decoder comprising a 3D motion adaptive comb filter and time-based correction, and a NICAM/A2 audio decoder to support worldwide television standards. The MSD9WB7GX-2 is also configured with a VBI processor to decode digital information such as Close Caption/V­chip/teletext/WSS/CGMS-A/VPS. In addition, the MStar advanced LCD TV processor enhances video quality, motion adaptive de-interlacer, picture quality adjustment units, and MStarACE-3 color engine.
With USB 2.0 host controllers, UART, IR, SPI, I2C, and PWM, the MSD9WB7GX-2 fulfills all requirements in advanced DTV sets. Furthermore, MSD9WB7GX-2 can access files from networks with embedded Ethernet MAC and external PHY via the MII/RMII interface. To reduce system costs, the MSD9WB7GX-2 also integrates intelligent power management control capability for green-mode requirements and spread-spectrum support for EMI management.
The MSD9WB7GX-LF-2 is composed of several modules:
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