VESTEL 17MB08P-3 User manual

26” TFT
SERVICE MANUAL
(17MB08P)
RELEASE DATE: 04.03.2005
PREPARED BY: VESTEL ELECTRONICS

THIS PAGE IS INTENTIONALLY LEFT BLANK

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26” TFT TV Service Manual 04/03/2005
TABLE OF CONTENTS
1. INTRODUCTION ...................................................................................................................................... 1
2. TUNER...................................................................................................................................................... 1
3. IF PART (TDA9886) ................................................................................................................................. 1
4. MULTI STANDARD SOUND PROCESSOR ............................................................................................ 2
5. VIDEO SWITCH TEA6415 ....................................................................................................................... 2
6. AUDIO AMPLIFIER STAGE WITH TPA3002D2 ...................................................................................... 2
7. POWER .................................................................................................................................................... 2
8. MICROCONTROLLER SDA55XX............................................................................................................ 3
8.1. General Features............................................................................................................................... 3
8.2. External Crystal and Programmable Clock Speed............................................................................ 3
8.3. Microcontroller Features.................................................................................................................... 3
8.4. Memory.............................................................................................................................................. 3
8.5. Display Features................................................................................................................................ 3
8.6. ROM Characters................................................................................................................................ 3
8.7. Acquisition Features .......................................................................................................................... 4
8.8. Ports .................................................................................................................................................. 4
9. SERIAL ACCESS CMOS 16K (2048*8) EEPROM ST24C16 .................................................................. 4
10. CLASS AB STEREO HEADPHONE DRIVER TDA1308 .........................................................................4
11. SAW FILTERS.......................................................................................................................................... 4
12. IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM ....................................................................... 5
12.1. LM1117.............................................................................................................................................. 5
12.1.1. General Description................................................................................................................. 5
12.1.2. Features .................................................................................................................................... 5
12.1.3. Applications.............................................................................................................................. 5
12.1.4. Connection Diagrams.............................................................................................................. 5
12.2. LM2576.............................................................................................................................................. 6
12.2.1. General Description................................................................................................................. 6
12.2.2. Features .................................................................................................................................... 6
12.2.3. Pin description ......................................................................................................................... 6
12.3. LM317T ............................................................................................................................................. 7
12.3.1. Description................................................................................................................................7
12.3.2. Features .................................................................................................................................... 7
12.4. ST24LC21 ......................................................................................................................................... 8
12.4.1. Description................................................................................................................................8
12.4.2. Features .................................................................................................................................... 8
12.4.3. Pin connections........................................................................................................................ 8
12.5. TEA5114A ......................................................................................................................................... 9
12.5.1. General description ................................................................................................................. 9
12.5.2. Features .................................................................................................................................... 9
12.5.3. Pin Connections....................................................................................................................... 9
12.6. TEA6415.......................................................................................................................................... 10
12.6.1. General description ............................................................................................................... 10
12.6.2. Features .................................................................................................................................. 10
12.6.3. Pinning.................................................................................................................................... 10
12.7. VPC3230D....................................................................................................................................... 11
12.7.1. General Description............................................................................................................... 11
12.7.2. Pin Connections and Short Descriptions............................................................................ 11
12.8. SDA55XX (SDA5550)...................................................................................................................... 13
12.8.1. General description ............................................................................................................... 13
12.9. TPA3003D2 ..................................................................................................................................... 14
12.9.1. General Description............................................................................................................... 14
12.9.2. Features .................................................................................................................................. 14
12.9.3. Pin Connection....................................................................................................................... 14
12.10. TDA9885/86 .................................................................................................................................... 15
12.10.1. General description ............................................................................................................... 15
12.10.2. Features .................................................................................................................................. 15
12.10.3. Pinning.................................................................................................................................... 15

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26” TFT TV Service Manual 04/03/2005
12.11. TDA1308 ......................................................................................................................................... 16
12.11.1. General Description............................................................................................................... 16
12.11.2. Features .................................................................................................................................. 16
12.11.3. Pinning.................................................................................................................................... 16
12.12. PI5V330........................................................................................................................................... 17
12.12.1. General description ............................................................................................................... 17
12.12.2. Features .................................................................................................................................. 17
12.12.3. Pin Descriptions..................................................................................................................... 17
12.13. GM6015........................................................................................................................................... 18
12.13.1. General description ............................................................................................................... 18
12.13.2. Features .................................................................................................................................. 18
12.14. AD9883A ......................................................................................................................................... 19
12.14.1. General description ............................................................................................................... 19
12.14.2. Features .................................................................................................................................. 19
12.14.3. Pin Descriptions..................................................................................................................... 19
12.15. MC141585 ....................................................................................................................................... 22
12.15.1. General description ............................................................................................................... 22
12.15.2. Features .................................................................................................................................. 22
12.15.3. Pin Description....................................................................................................................... 22
12.16. MC34063 ......................................................................................................................................... 24
12.16.1. Description.............................................................................................................................. 24
12.16.2. Features .................................................................................................................................. 24
12.16.3. Pin connections...................................................................................................................... 24
12.17. MSP34X0G (MSP3410G) ............................................................................................................... 25
12.17.1. Introduction ............................................................................................................................ 25
12.17.2. Features .................................................................................................................................. 25
12.17.3. Pin connections...................................................................................................................... 26
12.18. DS90C385 ....................................................................................................................................... 28
12.18.1. General Description............................................................................................................... 28
12.18.2. Features .................................................................................................................................. 28
12.18.3. Pinning.................................................................................................................................... 28
12.19. NDS8947 ......................................................................................................................................... 29
12.19.1. General Description............................................................................................................... 29
12.19.2. Features .................................................................................................................................. 29
13. SERVICE MENU SETTINGS ................................................................................................................. 30
13.1. ADJUST MENU SETTINGS............................................................................................................30
13.2. OPTIONS MENU SETTINGS..........................................................................................................31
13.3. APS WSS TEST MENU .................................................................................................................. 36
14. BLOCK DIAGRAM.................................................................................................................................. 37
15. CIRCUIT DIAGRAMS............................................................................................................................. 38

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26” TFT TV Service Manual 04/03/2005
1. INTRODUCTION
26” TFT TV is a progressive TV control system with built-in de-interlacer and scaler. It uses a 1280*768
panel with 15:9 aspect ratio.The TV is capable of operation in PAL, SECAM, NTSC (playback) colour
standards and multiple transmission standards as B/G, D/K, I/I’, and L/L’ including German and NICAM
stereo. Sound system output is supplying 2x8W (10%THD) for stereo 8speakers. The chassis is
equipped with many inputs and outputs allowing it to be used as a center of a media system.
It supports following peripherals:
2 SCART’s with all of them supporting full SCART features including RGB input
1 AV input. (CVBS+ Stereo Audio)
1 SVHS iput
1 Stereo Headphone output
1 D-Sub 15 PC input
1 DVI input (Optional)
1 Audio line out
1 Stereo audio input for PC/DVI
2. TUNER
As the thickness of the TV set has a limit, a horizontal mounted tuner is used in the product, which is
suitable for CCIR systems B/G, H, L, L’, I/I’, and D/K. The tuning is available through the digitally controlled
I2C bus (PLL). Below you will find info on the Tuner in use.
General description of UV1316:
The UV1316 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range of
applications. It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’. The low IF
output impedance has been designed for direct drive of a wide variety of SAW filters with sufficient
suppression of triple transient.
Features of UV1316:
1. Member of the UV1300 family small sized UHF/VHF tuners
2. Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K
3. Digitally controlled (PLL) tuning via I2C-bus
4. Off-air channels, S-cable channels and Hyper band
5. Compact size
6. Complies to “CENELEC EN55020” and “EN55013”
Pinning:
1. Gain control voltage (AGC) : 4.0V, Max: 4.5V
2. Tuning voltage
3. I²C-bus address select : Max: 5.5V
4. I²C-bus serial clock : Min:-0.3V, Max: 5.5V
5. I²C-bus serial data : Min:-0.3V, Max: 5.5V
6. Not connected
7. PLL supply voltage : 5.0V, Min: 4.75V, Max: 5.5V
8. ADC input
9. Tuner supply voltage : 33V, Min: 30V, Max: 35V
10. Symmetrical IF output 1
11. Symmetrical IF output 2
3. IF PART (TDA9886)
The TDA9886 is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal
PLL demodulator for positive and negative modulation, including sound AM and FM processing.
The following figure shows the simplified block diagram of the integrated circuit.
The integrated circuit comprises the following functional blocks:
VIF amplifier, Tuner and VIF-AGC, VIF-AGC detector, Frequency Phase-Locked Loop (FPLL) detector, VCO
and divider, Digital acquisition help and AFC, Video demodulator and amplifier, Sound carrier trap, SIF amplifier,
SIF-AGC detector, Single reference QSS mixer, AM demodulator, FM demodulator and acquisition help, Audio
amplifier and mute time constant, I²C-bus transceivers and MAD (module address), Internal voltage stabilizer.

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26” TFT TV Service Manual 04/03/2005
4. MULTI STANDARD SOUND PROCESSOR
The MSP34x0G family of single-chip Multistandard Sound Processors covers the sound processing of all
analog TV-Standards worldwide, as well as the NICAM digital sound standards. The full TV sound
processing, starting with analog sound IF signal-in, down to processed analog AF-out, is performed on a
single chip.
These TV sound processing ICs include versions for processing the multichannel television sound (MTS)
signal conforming to the standard recommended by the Broadcast Television Systems Committee (BTSC).
The DBX noise reduction, or alternatively, Micronas Noise Reduction (MNR) is performed alignment free.
Other processed standards are the Japanese FM-FM multiplex standard (EIA-J) and the FM Stereo Radio
standard.
Current ICs have to perform adjustment procedures in order to achieve good stereo separation for BTSC
and EIA-J. The MSP 34x1G has optimum stereo performance without any adjustments.
5. VIDEO SWITCH TEA6415
In case of three or more external sources are used, the video switch IC TEA6415 is used. The main
function of this device is to switch 8 video-input sources on the 6 outputs.
Each output can be switched on only one of each input. On each input an alignment of the lowest level of
the signal is made (bottom of sync. top for CVBS or black level for RGB signals).
Each nominal gain between any input and output is 6.5dB.For D2MAC or Chroma signal the alignment is
switched off by forcing, with an external resistor bridge, 5VDC on the input. Each input can be used as a
normal input or as a MAC or Chroma input (with external Resistor Bridge). All the switching possibilities are
changed through the BUS. Driving 75ohm load needs an external resistor. It is possible to have the same
input connected to several outputs.
6. AUDIO AMPLIFIER STAGE WITH TPA3002D2
The TPA3002D2 is a 9-W (per channel) efficient, Class-D audio amplifier for driving bridged-tied stereo
speakers. The TPA3002D2 can drive stereo speakersas low as 8 . The high efficiency of the TPA3002D2
eliminates the need for external heatsinks when playing music.
7. POWER
The LM2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient
design of a step–down switching regulator (buck converter). All circuits of this series are capable of driving
a 3.0A load with excellent line and load regulation. Two different versions (one having a fixed output
voltage of 3.3 V, and one with 5.0 V) of this IC are used in the regulator board.

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26” TFT TV Service Manual 04/03/2005
8. MICROCONTROLLER SDA55XX
8.1. General Features
• Feature selection via special function register
• Simultaneous reception of TTX, VPS, PDC, and WSS (line 23)
• Supply Voltage 2.5 and 3.3 V
• ROM version is used.
8.2. External Crystal and Programmable Clock Speed
• Single external 6MHz crystal, all necessary clocks are generated internally
• CPU clock speed selectable via special function registers.
• Normal Mode 33.33 MHz CPU clock, Power Save mode 8.33 MHz
8.3. Microcontroller Features
• 8bit 8051 instruction set compatible CPU.
• 33.33-MHz internal clock (max.)
• 0.360 µs (min.) instruction cycle
• Two 16-bit timers
• Watchdog timer
• Capture compare timer for infrared remote control decoding
• Pulse width modulation unit (2 channels 14 bit, 6 channels 8 bit)
• ADC (4 channels, 8 bit)
• UART (rxd, txd)
8.4. Memory
• Up to 128 Kilobyte on Chip Program ROM
• Eight 16-bit data pointer registers (DPTR)
• 256-bytes on-chip Processor Internal RAM (IRAM)
• 128bytes extended stack memory.
• Display RAM and TXT/VPS/PDC/WSS-Acquisition-Buffer directly accessible via MOVX
• UP to 16KByte on Chip Extended RAM (XRAM) consisting of;
- 1 Kilobyte on-chip ACQ-buffer-RAM (access via MOVX)
- 1 Kilobyte on-chip extended-RAM (XRAM, access via MOVX) for user software
- 3-Kilobyte Display Memory
8.5. Display Features
• ROM Character set supports all East and West European Languages in single device
• Mosaic Graphic Character Set
• Parallel Display Attributes
• Single/Double Width/Height of Characters
• Variable Flash Rate
• Programmable Screen Size (25 Rows x 33...64 Columns)
• Flexible Character Matrixes (HxV) 12 x 9...16
• Up to 256 Dynamical Redefinable Characters in standard mode; 1024 Dynamical Redefinable Characters
in Enhanced Mode
• CLUT with up to 4096 colour combinations
• Up to 16 Colours per DRCS Character
• One out of 8 Colours for Foreground and Background Colours for 1-bit DRCS and ROM Characters
8.6. ROM Characters
• Shadowing
• Contrast Reduction
• Pixel by Pixel Shiftable Cursor With up to 4 Different Colours
• Support of Progressive Scan and 100 Hz.
• 3 X 4Bits RGB-DACs On-Chip
• Free Programmable Pixel Clock from 10 MHz to 32MHz
• Pixel Clock Independent from CPU Clock
• Multinorm H/V-Display Synchronisation in Master or Slave Mode

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26” TFT TV Service Manual 04/03/2005
8.7. Acquisition Features
• Multistandard Digital Data Slicer
• Parallel Multi-norm Slicing (TTX, VPS, WSS, CC, G+)
• Four Different Framing Codes Available
• Data Caption only limited by available Memory
• Programmable VBI-buffer
• Full Channel Data Slicing Supported
• Fully Digital Signal Processing
• Noise Measurement and Controlled Noise Compensation
• Attenuation Measurement and Compensation
• Group Delay Measurement and Compensation
• Exact Decoding of Echo Disturbed Signals
8.8. Ports
• One 8-bit I/O-port with open drain output and optional I 2 C Bus emulation support (Port0)
• Two 8-bit multifunction I/O-ports (Port1, Port3)
• One 4-bit port working as digital or analogue inputs for the ADC (Port2)
• One 2-bit I/O port with secondary function (P4.2, 4.3, 4.7)
• One 4-bit I/O-port with secondary function (P4.0, 4.1, 4.4) (Not available in P-SDIP 52)
9. SERIAL ACCESS CMOS 16K (2048*8) EEPROM ST24C16
The ST24C16 is a 16Kbit electrically erasable programmable memory (EEPROM), organised as 8 blocks
of 256*8 bits. The memory is compatible with the I²C standard, two wire serial interface, which uses a bi-
directional data bus and serial clock. The memory carries a built-in 4 bit, unique device identification code
(1010) corresponding to the I²C bus definition. This is used together with 1 chip enable input (E) so that up
to 2*8K devices may be attached to the I²C bus and selected individually.
10.CLASS AB STEREO HEADPHONE DRIVER TDA1308
The TDA1308 is an integrated class AB stereo headphone driver contained in a DIP8 plastic package. The
device is fabricated in a 1 mm CMOS process and has been primarily developed for portable digital audio
applications.
11.SAW FILTERS
K3953M is an IF Filter for Video Applications. The package is SIP5K. Supported standards are B/G, D/K, I,
L/L’.
K9656M is an IF Filter for Audio Applications. The package is SIP5K. Supported standards are B/G, D/K, I,
L/L’.

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26” TFT TV Service Manual 04/03/2005
12.IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM
LM1117 TDA9886
LM2576 TDA1308T
LM317T PI5V330
ST24LC21 GM6015
TEA5114A AD9883A
TEA6415 MC141585
VPC3230D MC34063
SDA55XX MSP3410G
TPA3002D2 DS90C385
NDS8947
12.1. LM1117
12.1.1. General Description
The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current.
It has the same pin-out as National Semiconductor’s industry standard LM317. The LM1117 is available in
an adjustable version, which can set the output voltage from 1.25V to 13.8V with only two external
resistors. In addition, it is also available in five fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V.
The LM1117 offers current limiting and thermal shutdown. Its circuit includes a zener trimmed bandgap
reference to as-sure output voltage accuracy to within ±1%. The LM1117 series is available in SOT-223,
TO-220, and TO-252 D-PAK packages. A minimum of 10µF tantalum capacitor is required at the output to
improve the transient response and stability.
12.1.2. Features
• Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions
• Space Saving SOT-223 Package
• Current Limiting and Thermal Protection
• Output Current 800mA
• Line Regulation 0.2% (Max)
• Load Regulation 0.4% (Max)
• Temperature Range
— LM1117 0°C to 125°C
—LM1117I -40°C to 125°C
—
12.1.3. Applications
• 2.85V Model for SCSI-2 Active Termination
• Post Regulator for Switching DC/DC Converter
• High Efficiency Linear Regulators
• Battery Charger
• Battery Powered Instrumentation
12.1.4. Connection Diagrams

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26” TFT TV Service Manual 04/03/2005
12.2. LM2576
12.2.1. General Description
The LM2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient
design of a step–down switching regulator (buck converter). All circuits of this series are capable of driving
a 3.0 A load with excellent line and load regulation.
These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output
version. These regulators were designed to minimize the number of external components to simplify the
power supply design. Standard series of inductors optimized for use with the LM2576 are offered by
several different inductor manufacturers.
Since the LM2576 converter is a switch–mode power supply, its efficiency is significantly higher in
comparison with popular three–terminal linear regulators, especially with higher input voltages. In many
cases, the power dissipated is so low that no heatsink is required or its size could be reduced dramatically.
A standard series of inductors optimized for use with the LM2576 are available from several different
manufacturers. This feature greatly simplifies the design of switch–mode power supplies.
The LM2576 features include a guaranteed ±4% tolerance on output voltage within specified input voltages
and output load conditions, and ±10% on the oscillator frequency (±2% over 0°C to 125°C). External
shutdown is included, featuring 80 mA (typical) standby current. The output switch includes cycle–by–cycle
current limiting, as well as
thermal shutdown for full protection under fault conditions.
12.2.2. Features
• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions
• Adjustable Version Output Voltage Range, 1.23 to 37 V ±4% Maximum Over Line and Load Conditions
• Guaranteed 3.0 A Output Current
• Wide Input Voltage Range
• Requires Only 4 External Components
• 52 kHz Fixed Frequency Internal Oscillator
• TTL Shutdown Capability, Low Power Standby Mode
• High Efficiency
• Uses Readily Available Standard Inductors
• Thermal Shutdown and Current Limit Protection
• Moisture Sensitivity Level (MSL) Equals 1
12.2.3. Pin description