VESTEL AK30 Service Manual

CONTENTS

A. ANALOG PART

SAFETY PRECAUTIONS: ........................................................................................................................................... 3

 TV set switched off...................................................................................................................3

 Measurements ...........................................................................................................................3

PERI-TV SOCKET ........................................................................................................................................................3

 SCART 1 ..................................................................................................................................3

 SCART 2 ..................................................................................................................................3

1. INTRODUCTION ......................................................................................................................................................4

 2. SMALL SIGNAL PART WITH STV2248 .........................................................................4

 2.1 Vision IF amplifier..............................................................................................................4

 2.2 QSS Sound circuit (QSS versions) .....................................................................................4

 2.3 FM demodulator and audio amplifier (mono versions) ......................................................4

 2.4 Video switching ..................................................................................................................5

 2.5 Synchronisation circuit .......................................................................................................5

 2.6 Chroma and luminance processing .....................................................................................5

 2.7 RGB output circuit..............................................................................................................6

 2.8 µ-Controller ........................................................................................................................7

3. TUNER ........................................................................................................................................................................7

4- DIGITAL TV SOUND PROCESSOR MSP34X0....................................................................................................8

5. SOUND OUTPUT STAGE TDA7266L/TDA7266 ...................................................................................................8

6. VERTICAL OUTPUT STAGE WITH TDA8174A .................................................................................................8

7. TRIPLE VIDEO OUTPUT AMPLIFIER TDA6107JF ..........................................................................................8

8. POWER SUPPLY (SMPS) ........................................................................................................................................8

9. POWER FACTOR CORRECTION ......................................................................................................................... 8

10. POWER CARD 11PW04-3, 11PW05..…………………………………………………………8

11. RGB SWITCHING CARD 11RGB30-3……………………...………………………………...9

12. SERIAL ACCESS CMOS 8K EEPROM 24C08 ................................................................................................... 9

13. CLASS AB STEREO HEADPHONE DRIVER TDA1308 ................................................................................... 9

14. SAW FILTERS ......................................................................................................................................................... 9

15. IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM ............................................................................. 9

 ST92195................................................................................................................................10

 STV224X ..............................................................................................................................11

 UV1315, UV1316, UV1336 ,TECC2949PG40B,TAEA-G0XXD ,ChongQing QingJia .....12

 TDA7266/TDA7266L ..........................................................................................................14

 TDA8174 ..............................................................................................................................15

 TDA6107JF ..........................................................................................................................15

 MC44608 ..............................................................................................................................16

 MSP34X0G .......................................................................................................................... 17

 24C08....................................................................................................................................18

 TDA1308 ..............................................................................................................................19

 PI5V330………………………………………………………………………………….…20

 SAW FILTERS.....................................................................................................................21

SERVICE MENU ADJUSTMENTS ........................................................................................................................... 21

OPTIONS ......................................................................................................................................................................31

GENERAL BLOCK DIAGRAM of 11AK30 .............................................................................................................37

CIRCUIT DIAGRAMS................................................................................................................................................ 38

DO NOT CHANGE ANY MODULE UNLESS THE SET IS SWITCHED OFF

The mains supply part of the switch mode power supply’s transformer is live. Use an isolating transformer. The receiver complies with the safety requirements.

SAFETY PRECAUTIONS:

The service of this TV set must be carried out by qualified persons only. Components marked with the warning symbol on the circuit diagram are critical for safety and must only be replaced with an identical component.

- Power resistor and fused resistors must be mounted in an identical manner to the original component.

- When servicing this TV, check that the EHT does not exceed 26kV.

TV set switched off:

Make short-circuit between HV-CRT clip and CRT ground layer. Short C809 before changing IC800 and IC801 or other components in primary side of the SMPS part.

Measurements:

Voltage readings and oscilloscope traces are measured under the following conditions: Antenna signal’s level is 60dB at the color bar pattern from the TV pattern generator. (100% white, 75% color saturation) Brightness, contrast, and color are adjusted for normal picture performance. Mains supply, 220VAC, 50Hz.

PERI-TV SOCKET

- The figure of PERI-TV socket-

SCART 1 PINING

1 Audio right output 0.5Vrms / 1K 2 Audio right input 0.5Vrms / 10K 3 Audio left output 0.5Vrms / 1K 4 Ground AF 5 Ground Blue 6 Audio left input 0.5Vrms / 10K 7 Blue input 0.7Vpp / 75ohm 8 AV switching input 0-12VDC /10K 9 Ground Green 10 11 Green input 0.7Vpp / 75ohm 12 13 Ground Red 14 Ground Blanking 15 Red input 0.7Vpp / 75ohm 16 Blanking input 0-0.4VDC, 1-3VDC / 75 Ohm 17 Ground CVBS output 18 Ground CVBS input

19 CVBS output 1Vpp / 75ohm 20 CVBS input 1Vpp / 75ohm 21 Ground

SCART 2 PINING

1 Audio right output 0.5Vrms / 1K 2 Audio right input 0.5Vrms / 10K 3 Audio left output 0.5Vrms / 1K 4 Ground AF 5 Ground Blue 6 Audio left input 0.5Vrms / 10K 7 Blue input 8 AV switching input 0-12VDC /10K 9 Ground Green 10 11 12 13 Ground Red 14 Ground Blanking

15 16 17 Ground CVBS output 18 Ground CVBS input

19 CVBS output 1Vpp / 75ohm 20 CVBS input 1Vpp / 75ohm 21 Ground

1. INTRODUCTION

11AK30 is a 90° chassis capable of driving 20”/21” tubes at the appropriate currents. The chassis is capable of operating in PAL, SECAM and NTSC standards. The sound system is capable of giving 5 watts RMS output into a load of 8 ohms. One page, 7 page SIMPLETEXT, TOPTEXT, FASTTEXT and US Closed Caption is also provided. The chassis is equipped with a double-deck 42 pin Scart connector.

2. SMALL SIGNAL PART WITH STV2248:

STV2248 video processor is essential for realizing all small signal functions for a color TV

receiver.

2.1 Vision IF amplifier3

The vision IF amplifier can demodulate signals with positive and negative modulation. The PLL demodulator is completely alignment-free. Although the VCO (Toko-coil) of the PLL circuit is external, yet the frequency is fixed to the required value by the original manufacturer thus the Toko-coil does not need to be adjusted manually. The setting of the various frequencies (38.9 or

45.75 MHz) can be made via changing the coil itself.

2.2 QSS Sound circuit (QSS versions)

The sound IF amplifier is similar to the vision IF amplifier and has an external AGC de-coupling capacitor. The single reference QSS mixer is realised by a multiplier. In this multiplier the SIF signal is converted to the inter-carrier frequency by mixing it with the regenerated picture carrier from the VCO. The mixer output signal is supplied to the output via a high-pass filter for attenuation of the residual video signals. With this system a high performance hi-fi stereo sound processing can be achieved. The AM sound demodulator is realised by a multiplier. The modulated sound IF signal is multiplied in phase with the limited SIF signal. The demodulator output signal is supplied to the output via a low-pass filter for attenuation of the carrier harmonics. The AM signal is supplied to the output via the volume control.

2.3. AM DEMODULATOR

The AM demodulated signal results from multiplying the input signal by itself, it is available on AM/FM output.

2.3 FM demodulator and audio amplifier (mono versions):

The FM demodulator is realized as narrow-band PLL with external loop filter, which provides the necessary selectivity without using an external band-pass filter. To obtain a good selectivity a linear phase detector and constant input signal amplitude are required. For this reason the intercarrier signal is internally supplied to the demodulator via a gain controlled amplifier and AGC circuit. The nominal frequency of the demodulator is tuned to the required frequency (4.5/5.5/6.0/6.5 MHz) by means of a calibration circuit that uses the clock frequency of the µcontroller/Teletext decoder as a reference. The setting to the wanted frequency is realized by means of the software. It can be read whether the PLL frequency is inside or outside the window and whether the PLL is in lock or not. With this information it is possible to make an automatic search system for the incoming sound frequency. This is realized by means of a software loop that alternate the demodulator to various frequencies, then select the frequency on which a lock

condition has been found. De-emphasis output signal amplitude is independent of the TV standard and has the same value for a frequency deviation of ±25 kHz at the 4.5 MHz standard and for a deviation of ±50 kHz for the other standards. When the IF circuit is switched to positive modulation the internal signal on de-emphasis pin is automatically muted. The audio control circuit contains an audio switch and volume control. In the mono inter-carrier sound versions the Automatic Volume Leveling (AVL) function can be activated. The pin to which the external capacitor has to be connected depends on the IC version. For the 90° types the capacitor is connected to the EW output pin (pin 20). When the AVL is active it automatically stabilizes the audio output signal to a certain level.

2.4 Video switching

The video processor (STV2248C) has three CVBS inputs and two RGB inputs. The first CVBS input is used for external CVBS from SCART 1, the second is used for either CVBS or Y/C from either SCART2 or BAV/FAV, and the third one is used for internal video. The selection between both external video inputs signals is realized by means of software and hardware switches.

2.5 Synchronization circuit

The video processor (STV224X) performs the horizontal and vertical processing. The external horizontal deflection circuit is controlled via the Horizontal output pulse (HOUT). The vertical scanning is performed through an external ramp generator and a vertical power amplifier IC controlled by the Vertical output pulse (VOUT). The main components of the deflection circuit are:

• PLL1: the first phase locked loop that locks the internal line frequency reference on the CVBS input signal. It is composed of an integrated VCO (12 MHz) that requires the chroma Reference frequency (4.43MHz or 3.58MHz crystal oscillator reference signal), a divider by 768, a line decoder, and a phase comparator.

• PLL2: The second phase locked loop that controls the phase of the horizontal output (Compensation of horizontal deflection transistor storage time variation). Also the horizontal position adjustment is also performed in PLL2.

• A vertical pulse extractor.

• A vertical countdown system to generate all vertical windows (vertical synchronization window, frame blanking pulses, 50/60Hz identification window...).

• Automatic identification of 50/60Hz scanning.

• PLL1 time constant control.

• Noise detector, video identification circuits, and horizontal coincidence detector.

• Vertical output stage including de-interlace function, vertical position control.

• Vertical amplitude control voltage output (combined with chroma reference output and Xtal 1 indication).

2.6 Chroma and luminance processing:

The chroma decoder is able to demodulate PAL, NTSC and SECAM signals. The decoder dedicated to PAL and NTSC sub-carrier is based on a synchronous demodulator, and an Xtal PLL locked on the phase reference signal (burst). The SECAM demodulation is based on a PLL with automatic calibration loop. The color standard identification is based on the burst recognition. Automatic and forced modes can be selected through the I2C bus. NTSC tint, and auto flesh are controlled through I2C bus. Xtal PLL can handle up to 3 crystals to work in PAL M, PAL N and NTSC M for South America. ACC an ACC overload control the chroma sub-carrier amplitude within 26dB range. Both

ACC s are based on digital systems and do not need external capacitor. All chroma filters are fully integrated and tuned via a PLL locked on Xtal VCO signal. A second PLL is used for accurate fine-tuning of the SECAM bell filter. This tuning is achieved during the frame blanking. An external capacitor memorizes the bell filter tuning voltage. A base-band chroma delay-line rebuilds the missing color line in SECAM and removes transmission phase errors in PAL. The base-band chroma delay line is clocked with 6MHz signal provided by the horizontal scanning VCO. The luminance processor is composed of a chroma trap filter, a luminance delay line, a peaking function with noise coring feature, a black stretch circuit. Trap filter and luminance delay lines are achieved with the use of bi-quad integrated filters, autoaligned via a master filter phase locked loop.

2.7 RGB output circuit:

The video processor performs the R, G, B processing. There are three sources:

1. Y,U,V inputs (coming from luma part (Y output), and chroma decoder outputs (R-Y, B-Y

outputs).

2. External R,G,B inputs from SCART (converted internally in Y,U,V), with also the possibility

to input YUV signals from a DVD player, (YUV specification is Y=0.7 V PP , U= 0.7 V PP , V = 0.7V PP for 100% color bar).

3. Internal R,G,B inputs (for OSD and Teletext display)

The main functions of the video part are:

- Y,U,V inputs with integrated clamp loop, allowing a DC link with YUV outputs,

- External RGB inputs (RGB to YUV conversion), or direct YUV inputs,

- Y,U,V switches,

- Contrast, saturation, brightness controls,

- YUV to RGB matrix,

- OSD RGB input stages (with contrast control),

- RGB switches,

- APR function,

- DC adjustment of red and green channels,

- Drive adjustments (R, G, B gain),

- Digital automatic cut-off loop control,

- Manual cut-off capability with I2C adjustments,

- Half tone, oversize blanking, external insertion detection, blue screen,

- Blanking control and RGB output stages.

2.8 µ-Controller

The ST92195 is the micro-controller, which is required for a color TV receiver. ST92195D1 is the version with one page Teletext and ST92195D7 is the one with 7 page Teletext. The IC has the supply voltages of 5 V and they are mounted in PSDIP package with 56 pins. µ-Controller has the following features  Display of the program number, channel number, TV Standard, analogue values, sleep timer,

parental control and mute is done by OSD

 Single LED for standby and on mode indication  System configuration with service mode  3 level logic output for SECAM and Tuner band switching

3. TUNER

Either a PLL or a VST tuner is used as a tuner. UV1316 (VHF/UHF) is used as a PLL tuner. For only PALM/N, NTSC M applications UV 1336 is used as the PLL tuner. UV 1315 (VHF/UHF) is used as a VST Tuner.

Channel coverage of UV1316:

BAND

OFF-AIR CHANNELS

CHANNELS FREQUENCY

RANGE (MHz)

CABLE CHANNELS

CHANNELS FREQUENCY

RANGE (MHz) Low Band E2 to C 48.25 to 82.25 (1) S01 to S08 69.25 to 154.25 Mid Band E5 to E12 175.25 to 224.25 S09 to S38 161.25 to 439.25 High Band E21 to E69 471.25 to 855.25 (2) S39 to S41 447.25 to 463.25

(1). Enough margin is available to tune down to 45.25 MHz. (2). Enough margin is available to tune up to 863.25 MHz.

Noise Typical Max. Gain Min. Typical Max.

Low band : 5dB 9dB All channels : 38dB 44dB 52dB Mid band : 5dB 9dB Gain Taper (of-air channels): 8dB High band : 6dB 9dB

Channel Coverage UV1336:

BAND CHANNELS FREQUENCY

RANGE (MHz) Low Band 2 to D 55.25 to 139.25 Mid Band E to PP 145.25 to 391.25 High Band QQ to 69 397.25 to 801.25

Noise is typically 6dB for all channels. Gain is minimum 38dB and maximum 50dB for all channels.

Channel Coverage of UV1315:

BAND

OFF-AIR CHANNELS

CHANNELS FREQUENCY

RANGE (MHz)

CABLE CHANNELS

CHANNELS FREQUENCY

RANGE (MHz) Low Band E2 to C 48.25 to 82.25 (1) S01 to S10 69.25 to 168.25 Mid Band E5 to E12 175.25 to 224.25 S11 to S39 231.25 to 447.25 High Band E21 to E69

471.25 to 855.25 (2)

S40 to S41 455.25 to 463.25

(1). Enough margin is available to tune down to 45.25 MHz. (2). Enough margin is available to tune up to 863.25 MHz.

Noise Typ. Max. Gain Min. Typ. Max. Low band 6dB 9dB All Channels 38dB 44dB 50dB Mid band 6dB 10dB Gain Taper 8dB High band 6dB 11dB (off-air channels)

4. DIGITAL TV SOUND PROCESSOR MSP34X0

The MSP 34x0D is designed to perform demodulation of FM or AM-Mono TV sound. Alternatively, two-carrier FM systems according to the German or Korean terrestrial specs or the satellite specs can be processed with the MSP 34x0D. Digital demodulation and decoding of NICAM-coded TV stereo sound, is done only by the MSP 3410. The MSP 34x0D offers a powerful feature to calculate the carrier field strength which can be used for automatic standard detection (terrestrial) and search algorithms (satellite).

5. SOUND OUTPUT STAGE TDA7266L/TDA7266

TDA7266L is used as the AF output amplifier for mono applications. It is supplied by +12VDC coming from a separate winding in the SMPS transformer. An output power of 5.5W (THD=0.5%) can be delivered into an 8ohm load. TDA7266 is used as the AF output amplifier for stereo applications. It is supplied by +12VDC coming from a separate winding in the SMPS transformer. An output power of 2*5.5W (THD=0.5%) can be delivered into an 8ohm load.

6. VERTICAL OUTPUT STAGE WITH TDA8174A

The TDA8174A is a power amplifier circuit for use in 90° and 110° colour deflection systems for 25 to 200 Hz field frequencies, and for 4 : 3 and 16 : 9 picture tubes.

7. TRIPLE VIDEO OUTPUT AMPLIFIER TDA6107JF

The TDA6107JF includes three video output amplifiers and is intended to drive the three cathodes of a colour CRT directly. The device is contained in a plastic DIL-bent-SIL 9-pin medium power (DBS9MPF) package, and uses high-voltage DMOS technology. To obtain maximum performance, the amplifier should be used with black-current control. Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is desirable to take normal precautions appropriate to handling MOS devices.

8. POWER SUPPLY (SMPS)

The DC voltages required at various parts of the chassis are provided by an SMPS transformer controlled by the IC MC44608 which is designed for driving, controlling and protecting switching transistor of SMPS. The transformer produces 115V for FBT input, 14V for audio output IC, S+3.3, S+5V and 8V for ST92195.

9. POWER FACTOR CORRECTION

Passive components are used for the solution of power factor correction.

10. POWER CARD

Power cards are used to supply DC voltages required for DVD box inside AK30 TV. 11PW04-3 card produces +3.3V, +2.5V, +5V DC voltages for DVD boxes.

11. RGB SWITCHING CARD 11RGB30-3

RGB Switching Card is used to switch R_EXT, G_EXT, B_EXT and R_DVDorDVB, G_DVDorDVB, B_DVDorDVB between each other to provide one R_OUT, G_OUT, B_OUT for output. PI5V330 Low On-Resistance Wideband/Video Quad 2-Channel Mux/DeMux IC is used to ensure switching operation.

10. SERIAL ACCESS CMOS 8K EEPROM 24C08

The 24C08 is a 8Kbit electrically erasable programmable memory (EEPROM), organized as 4 blocks of 256*08 bits. The memory is compatible with the I²C standard, two wire serial interface which uses a bi-directional data bus and serial clock.

11. CLASS AB STEREO HEADPHONE DRIVER TDA1308

The TDA1308 is an integrated class AB stereo headphone driver contained in a DIP8 plastic package

12. SAW FILTERS

Saw filter type: Model: G1975M: PAL B/G MONO K2966M: PAL SECAM B/G/D/K/I MONO J1981 : PAL-I MONO K2958M: PAL-SECAM B/G-D/K (38) MONO K2962M: PAL-SECAM B/G/D/K/I/L/L’ MONO L9653M: SECAM L/L’ AM MONO (AUDIO IF) G3967M: PAL-SECAM B/G STEREO (VIDEO IF) G9353M: PAL-SECAM B/G STEREO (AUDIO IF) K3958M: PAL-SECAM B/G/D/K/I/L/L’ STEREO (VIDEO IF) K9356M: PAL-SECAM B/G/D/K/I STEREO (AUDIO IF) K9656M: PAL-SECAM B/G/D/K/I/L/L’ STEREO (AUDIO IF) K3958M: PAL I NICAM (VIDEO IF) K9356M: PAL I NICAM (AUDIO IF) M1962M: PAL M/N NTSC M MONO M3953M: PAL M/N NTSC M STEREO (VIDEO IF) M9370M: PAL M/N NTSC M STEREO (AUDIO IF)

13. IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM

 ST92195  STV224X  TUNER (UV1315, UV1316, UV1336,TECC2949PG40B,TAEA-G0XXD ,ChongQing QingJia)  TDA7266L / TDA7266M  TDA8174A  TDA6107JF  MC44608  MSP34X0D  24C08  TDA1308

 SAW FILTERS G1975M, K2966M, K2962M, L9653M, G3962M, G9353M, K3958M, K9356M, K9656M, K6263K, K9652M, M1962M, M3953M, M9370M

ST92195

The ST92195 is a member of the ST9+ family of micro-controllers, completely developed and produced by SGS-THOMSON Microelectronics using a proprietary n-well HCMOS process. The nucleus of the ST92195 is the advanced Core, which includes the Central Processing Unit (CPU), the ALU, the Register File and the interrupt controller. The Core has independent memory and register buses to add to the efficiency of the code. A set of on-chip peripherals form a complete sys-tem for TV set and VCR applications: – Voltage Synthesis – VPS/WSS Slicer – Teletext Slicer – Teletext Display RAM – OSD Additional peripherals include a watchdog timer , a serial peripheral interface (SPI), a 16-bit timer and an A/D converter.

STV224X Video processor:

The STV2246/2247/2248 are fully bus controlled ICs for TV including PIF, SIF, luma, Chroma and deflection processing. Used with a vertical frame booster (TDA1771 or TDA8174 for 90° chassis, STV9306 for 110° chassis), they allow the design of multi-standard (BGDKIMNLL, PAL/ SECAM/NTSC) sets with very few external components and no manual adjustments.

UV1315, UV1316, UV1336,TECC2949PG40B,TAEA-G0XXD ,ChongQing QingJia

General description of UV1315:

The UV1315 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’.

Features of UV1315:

 Member of the UV1300 family small sized UHF/VHF tuners  Systems CCIR:B/G, H, L, L’, I and I’; OIRT:D/K  Voltage synthesized tuning (VST)  Off-air channels, S-cable channels and Hyper-band  Standardized mechanical dimensions and pinning

PINNING PIN VALUE

1. Gain control voltage (AGC) :4.0V, Max:4.5V

2. Tuning voltage

3. High band switch :5V, Min:4.75V, Max:5.5V

4. Mid band switch :5V, Min:4.75V, Max:5.5V

5. Low band switch :5V, Min:4.75V, Max:5.5V

6. Supply voltage :5V, Min:4.75V, Max:5.5V

7. Not connected

8. Not connected

9. Not connected

10. Symmetrical IF output 1

11. Symmetrical IF output 2

Band switching table:

Pin 3 Pin 4 Pin 5 Low band 0V 0V +5V Mid band 0V +5V 0V High band +5V 0V 0V

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’.

Features of UV1316:

 Member of the UV1300 family small sized UHF/VHF tuners  Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K  Digitally controlled (PLL) tuning via I²C-bus  Off-air channels, S-cable channels and Hyper-band  World standardized mechanical dimensions and world standard pinning  Complies to “CENELEC EN55020” and “EN55013”

PINNING PIN VALUE

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

General description of UV1336:

UV1336 series is developed for reception of channels broadcast in accordance with the M, N standard.

Features of UV1336:

 Global standard pinning  Integrated Mixer-Oscillator & PLL function  Conforms to CISPR 13, FCC and DOC (Canada) regulations  Low power consumption  Both Phono connector and ‘F’ connector are available

PINNING PIN VALUE

1. Gain control voltage :4.0V, Max:4.5V

2. Tuning voltage

3. Address select Max:5.5V

4. Serial clock :Min:-0.3V, Max:5.5V

5. Serial data :Min:-0.3V, Max:5.5V

6. Not connected

7. Supply voltage :5.0V, Min:4.75V, Max:5.5V

8. ADC input (optional)

9. Tuning supply voltage :33V, Min:30V, Max:35V

10. Ground

11. IF output

TECC2949PG40B SAMSUNG TUNER

Features:

• CCIR standart receiving system

•Off- air channels ,s-cable channels , 3 band (UHF,VHFhigh and low)

• PAL FST tuner

•Tuning system :Frequency synthesized type

Pinning:

1- AGC AGC Voltage supply (Typ:5V Max:4.5V) 2- NC No pin 3- SAS Adress select 4- SCL Serial clock 5- SDA Serial data 6- NC No pin 7- BP B+ for internal IC (Min:4.75V Typ:5V Max.5.5V) 8- NC No pin 9- BT Tuning supply voltage (Min:30V Typ:33V Max: 35V) 10- IF2 IF output2 11- IF1 IF1 output

TAEA-G0XXD LG TUNER

Features:

• CCIR+CATV standart receiving channel

•Off- air channels ,s-cable channels , 3 band (UHF,VHFhigh and low)

•Upper heterodyne Receiving system

•Varactor –Tuned(With PLL)

Pinning:

1- AGC AGC Voltage supply (Typ:5V Max:4.5V) 2- TU Tuning output voltage 3- SAS Adress select 4- SCL Serial clock 5- SDA Serial data 6- B+ No pin 7- B+ B+ for internal IC (Min:4.75V Typ:5V Max.5.5V) 8- NC No pin 9- BT Tuning supply voltage (Min:30V Typ:33V Max: 35V) 10- IF2 IF output2 11- IF1 IF1 output

ChongQing QingJia Electronical Co.Tuner

•PAL BG Receiving system

•PLL tuning system

•Off- air channels ,s-cable channels , 3 band (UHF,VHFhigh and low)

Pinning:

TDA7266/TDA7266L

General Description of TDA7266L

The TDA7266L is a mono bridge amplifier specially designed for TV and Portable Radio applications. Requires very few external components

WIDE SUPPLY VOLTAGE RANGE (3-18V) MINIMUM EXTERNAL COMPONENTS – NO SVR CAPACITOR – NO BOOTSTRAP – NO BOUCHEROT CELLS – INTERNALLY FIXED GAIN STAND-BY & MUTE FUNCTIONS SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION

PINNING

1 N.C. 2 N.C. 3 MUTE 4 ST-BY 5 PW-GND 6 S-GND 7 IN 8 VCC 9 OUT+ 10 OUT -

General Description of TDA7266

The TDA7266 is a 2x7 Watt dual power amplifier. It is used for sound amplification at stereo TV sets. WIDE SUPPLY VOLTAGE RANGE (3-18V) MINIMUM EXTERNAL COMPONENTS – NOSWR CAPACITOR – NOBOOTSTRAP – NOBOUCHEROT CELLS – INTERNALLY FIXED GAIN STAND-BY & MUTE FUNCTIONS SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION

PINNING

1. OUT1+

2. OUT1 –

3. VCC

4. IN1

5. N.C.

6. MUTE

7. ST-BY

8. PW-GND

9. S-GND

10. N.C.

11. N.C.

12. IN2

13. VCC

14. OUT2 -

15. OUT2+

TDA8174AW

INDEPENDENT VERTICAL AMPLITUDE ADJUSTEMENT. BUFFER STAGE. POWER AMPLIFIER .FLYBACKGENERATOR .THERMALPROTECTION .INTERNAL REFERENCE VOLTAGE DECOU-PLING

General Description:

TDA8174Aand TDA8174AWare a monolithic integrated circuits. It is a full performance and very efficient vertical deflection circuit intended for direct drive of a TV picture tube in Color and B & W television as well as in Monitor and Data displays.

PINNING

1. POWER OUTPUT

2. OUTPUT STAGE Vs

3. TRIGGER INPUT

4. HEIGHT ADJUSTMENT

5. VOLTAGE REF DECOUPLING

6. GROUND

7. RAMP GENERATOR

8. BUFFER OUTPUT

9. INVERTING INPUT

10. Vs

11. FLYBACK GENERATOR

TDA6107JF

General Description:

To obtain maximum performance, the amplifier should be used with black-current control.

FEATURES

· Typical bandwidth of 5.5 MHz for an output signal of 60 V (p-p)

· High slew rate of 900 V/ms

· No external components required

· Very simple application

· Single supply voltage of 200 V

· Internal reference voltage of 2.5 V

· Fixed gain of 50

· Black-Current Stabilization (BCS) circuit with voltage window from 1.8 to 6 V and current window from -100 mA to 10 mA

· Thermal protection

· Internal protection against positive flashover discharges appearing on the CRT.

PINNING SYMBOL PIN DESCRIPTION

Vi(1) 1 inverting input 1 Vi(2) 2 inverting input 2 Vi(3) 3 inverting input 3GND 4 ground (fin) Iom 5 black-current measurement output VDD 6 supply voltage Voc(3) 7 cathode output 3 Voc(2) 8 cathode output 2 Voc(1) 9 cathode output 1

MC44608

General description:

The MC44608 is a high performance voltage-mode controller designed for off–line converters. This high voltage circuit that integrates the start–up current source and the oscillator capacitor, requires few external components while offering a high flexibility and reliability.

The device also features a very high efficiency stand–by management consisting of an effective Pulsed Mode operation. This technique enables the reduction of the stand–by power consumption to approximately 1W while delivering 300mW in a 150W SMPS.

• Integrated start–up current source

• Loss less off–line start–up

• Direct off–line operation

• Fast start–up

General Features

• Flexibility

• Duty cycle control

• On chip oscillator switching frequency 40, or 75kHz

• Secondary control with few external components

Protections

• Maximum duty cycle limitation

• Cycle by cycle current limitation

• Demagnetization (Zero current detection) protection

• “Over V CC protection” against open loop

• Programmable low inertia over voltage protection against open loop

• Internal thermal protection

GreenLine Controller

• Pulsed mode techniques for a very high efficiency low power mode

• Lossless startup

• Low dV/dT for low EMI radiations

PINNING PIN VALUE

1. Demagnetization Zero cross detection voltage: 50 mV typ.

2. I Sense Over current protection voltage 1V typ.

3. Control Input Min: 7.5V Max.: 18V

4. Ground Iout 2A

p-p

during scan 1.2A

p-p

during flyback

5. Driver Output resistor 8.5 Ohm sink 15 Ohm source typ.

6. Supply voltage Max:16V (Operating range 6.6V-13V)

7. No connection

8. Line Voltage Min:50V Max:500V

MSP34X0D

The MSP 34x0D is designed to perform demodulation of FM or AM-Mono TV sound. Two kinds of MSP’s are used. MSP 3400D and MSP 3410D. The MSP 3400D is fully pin and softwarecompatible to the MSP 3410D, but is not able to decode NICAM. It is also compatible to the MSP 3400C.

General description:

Demodulator and NICAM Decoder Section

The MSP 34x0D is designed to perform demodulation of FM or AM-Mono TV sound. Alternatively, two-carrier FM systems according to the German or Korean terrestrial specs or the satellite specs can be processed with the MSP 34x0D. Digital demodulation and decoding of NICAM-coded TV stereo sound, is done only by the MSP 3410. The MSP 34x0D offers a powerful feature to calculate the carrier field strength, which can be used for automatic standard detection (terrestrial) and search algorithms (satellite).

General Features

 Two selectable analog inputs (TV and SAT-IF sources)  Automatic Gain Control (AGC) for analog IF input. Input range: 0.10–3 V pp  Integrated A/D converter for sound-IF inputs  All demodulation and filtering is performed on chip and is individually programmable  Easy realization of all digital NICAM standards (B/G, D/K, I & L) with MSP 3410G.  FM demodulation of all terrestrial standards (incl. identification decoding)  FM demodulation of all satellite standards  No external filter hardware is required  Only one crystal clock (18.432 MHz) is necessary  FM carrier level calculation for automatic search algorithms and carrier mute function

DSP Section (Audio Base band Processing)

 Flexible selection of audio sources to be processed  Two digital input and one output interface via I 2 S bus for external DSP processors, featuring

surround sound, ADR etc.

 Digital interface to process ADR (ASTRA Digital Radio) together with DRP 3510A  Performance of all de-emphasis systems including adaptive Wegener Panda 1 without external

components or controlling

 Digitally performed FM identification decoding and de-matrixing  Digital base-band processing: volume, bass, treble, 5-band equalizer, loudness, pseudo-stereo,

and base-width enlargement

 Simple controlling of volume, bass, treble, equalizer etc.

Analog Section

 four selectable analog pairs of audio base-band inputs (= four SCART inputs) input level: =<2

V RMS , input impedance: >=25 k

 one analog mono input (i.e. AM sound): input level: =<2 V RMS , input impedance: >=15 k  two high-quality A/D converters, S/N-Ratio: >=85 dB  20 Hz to 20 kHz bandwidth for SCART-to-SCART copy facilities

24C08

General description:

The 24C16 is a 8Kbit electrically erasable programmable memory (EEPROM), organized as 4 blocks of 256 * 08 bits. The memory operates with a power supply value as low as 2.5V.

Features:

 Minimum 1 million ERASE/WRITE cycles with over 10 years data retention  Single supply voltage:4.5 to 5.5V  Two wire serial interface, fully I²C-bus compatible  Byte and Multi-byte write (up to 8 bytes)  Page write (up to 16 bytes)  Byte, random and sequential read modes  Self timed programming cycle

PINNING PIN VALUE

1. Write protect enable :0V

2. Not connected :0V

3. Chip enable input :0V

4. Ground :0V

5. Serial data address input/output :Input LOW voltage: Min:-0.3V, Max:0.3*Vcc

:Input HIGH voltage: Min:0.7*Vcc, Max:Vcc+1

6. Serial clock :Input LOW voltage: Min:-0.3V, Max:0.3*Vcc

:Input HIGH voltage: Min:0.7*Vcc, Max:Vcc+1

7. Multibyte/Page write mode :Input LOW voltage: Min:-0.3V, Max:0.5V

:Input HIGH voltage: Min:Vcc-0.5, Max:Vcc+1

8. Supply voltage :Min:2.5V, Max:5.5V

TDA1308

Features:

 Wide temperature range  Excellent power supply ripple rejection  Low power consumption  Short-circuit resistant  High performance  high signal-to-noise ratio  low distortion

PINNING PIN VALUE

1. Output A (Voltage swing) :Min:0.75V, Max:4.25V

2. Inverting input A :Vo(clip):Min:1400mVrms

3. Non-inverting input A :2.5V

4. Ground :0V

5. Non-inverting input B :2.5V

6. Inverting input B :Vo(clip):Min:1400mVrms

7. Output B (Voltage swing) :Min:0.75V, Max:4.25V

8. Positive supply :5V, Min:3.0V, Max:7.0V

PI5V330

Description

Pericom Semiconductor’s PI5V330 is a true bidirectional Quad 2-channel multiplexer/demultiplexer recommended for both RGB and composite video switching applications. The video switch can be driven from a current output RAMDAC or voltage output composite video source.

Low On-Resistance and wide bandwidth make it ideal for video and other applications. Also this device has exceptionally high current capability which is far greater than most analog switches offered today. A single 5V supply is all that is required for operation.

The PI5V330 offers a high-performance, low-cost solution to switch between video sources. The application section describes the PI5V330 replacing the HC4053 multiplier and buffer/amplifier.

Features

• High-performance solution to switch between video sources

• Wide bandwidth: 200 MHz

• Low On-Resistance: 3Ω

• Low crosstalk at 10 MHz: –58dB

• Ultra-low quiescent power (0.1μA typical)

• Single supply operation: +5.0V

• Fast switching: 10ns

• High-current output: 100mA

• Packaging (Pb-free & Green Available):– 16-pin 300-mil wide plastic SOIC (S)

– 16-pin 150-mil wide plastic SOIC (W) – 16-pin 150-mil wide plastic QSOP (Q)

Saw filter’s list:

VIDEO

AUDIO

PAL BG

G1975M

PSBG DK

K2966M

PAL II'

J1981

PSBGDKK' II'

K2966M

PSBGDKK' LL'

K2962M

L9653

VIDEO

AUDIO

PAL BG

G3967M

G9353M

PAL II'

K3958M

K9356

PSBGDKK' II'

K3958M

K9356

PSBGDKK' LL'

K3958M

K9656

MONOSTR

PINNING

1. Input

2. Input-ground

3. Chip carrier-ground

4. Output

5. Output

K9656M, L9653M

PINNING

1. Input 4. Output

2. Switching Input 5. Output

3. Chip carrier-ground

AK30 SERVICE MENU ADJUSTMENTS

ENTERING TO SERVICE MENU:

In order to enter service menu, first enter the main menu and then press the digits 4, 7, 2 and 5 respectively. To select adjust parameters, use or buttons. To change the selected parameter, useor buttons. Selected parameter will be highlighted.

Entire service menu parameters of AK30 CHASSIS are listed below. For some of parameters the default values are given in this document also.

USING COLOUR BUTTONS ON SERVICE MENU:

- RED BUTTON : It switches the AVL to ON or OFF mode on service menu. AVL word is visible on service menu when AVL is on.

- GREEN BUTTON : It switches to GEOMETRY adjust menu. Geometry of the picture is adjusted in this menu.

- YELLOW BUTTON : It switches to VERTICAL SCAN DISABLE mode. It is useful to adjust screen voltage.

- BLUE BUTTON : It is used to adjust AGC and IF automatically on service menu.

OSD:

Select OSD parameter on service menu. Adjust the horizontal position of OSD to the middle of screen, by using the reference bar on bottom of service menu.

Min. Value: 000 Max. Value: 127 Recommended Value: 080

IF Adjustments:

IF1: IF Coarse Adjustment 003 IF2: IF Fine Adjustment 073 IF3: IF Coarse Adjustment for L-prime 004

IF4: IF Fine Adjustment for L-prime 065

IF NEGATIVE ADJUSTMENT (WITHOUT L’ SYSTEMS)

Set the video pattern to a PAL colour bar pattern with frequency 38.9 MHz. Apply this IF signal to PIN-10 and PIN-11 of tuner. Press PROG-1 and after that BLUE (INSTALL)button from remote controller. Select the standard as BG or I. (if BG is not available) Enter service menu. Select IF1 parameter from service menu and press BLUE (INSTALL) button from remote controller. IF adjustment will be done automatically by software. See the IF indicator on service menu, it must be like on FIGURE-1 shown belove.

IF POSITIVE ADJUSTMENT (WITH L’ SYSTEMS)

Set the video pattern to a SECAM-L colour bar pattern with frequency 33.9 MHz. Apply this IF signal to PIN-10 and PIN-11 of tuner. Press PROG-1 and after that BLUE (INSTALL)button from remote controller. Select the BAND VHF-1 (S1 – S4 for PLL tuners) and standard as L’. Enter service menu. Select IF1 parameter from service menu and press BLUE (INSTALL) button from remote controller. IF adjustment will be done automatically by software. See the IF indicator on service menu, it must be like on FIGURE-1 shown below.

AGC: Automatic Gain Control

In order to do AGC adjustment, enter a 60µdBV

RF signal level from channel C-12 (224.25 MHz) Select AGC parameter from service menu. Press BLUE (INSTALL) button from remote controller. The adjustment will be done automatically by software. See the AGC indicator on service menu, it must be 1. Check that picture is normal at 90dBµV signal level.

: 1 1

IF INDICATOR AGC INDICATOR NONE

Min. Value: 000 Max. Value: 063 Recommended Value: Automatically, described above.

SCREEN ADJUSTMENT: (FBT Screen)

Enter service menu by pressing “MENU” and “4, 7, 2, 5” or press the mute and info buttons at the same time from remote controller. Then press yellow button to disable vertical scan. Adjust horizontal line via screen pot. as thin as possible. Press yellow button again to enable vertical scan. Press “TV” button to leave service menu.

VLIN: Vertical Linearity

Enter a PAL B/G circle test pattern via RF. Change VLIN till you see circle as round as possible.

SCREEN ADJ.POT.

Min. Value: 000 Max. Value: 063 Recommended Value : 035

RGBH: RGB Mode Horizontal Shift Offset

Enter a RGB circle test pattern via video inputs. Force the TV to RGB mode by pressing AV button from remote controller. Change RGB Horizontal Position till the picture is horizontally centered. Check and readjust RGBH item if the adjustment becomes improper after some other geometric adjustments are done.

Min. Value: 000 Max. Value: 063 Default Value : 007

VSOF: Vertical Size Offset for 60 Hz

Enter an NTSC-M circle test pattern via RF or video inputs. Change Vertical Size until the checkered parts of test pattern on both of upper and lower side disappear. Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done.

Min. Value: -08 Max. Value: +55 Recommended Value: -16

VPOF: Vertical Position Offset for 60 Hz

Enter an NTSC-M circle test pattern via RF or video inputs. Change Vertical Position till the picture is vertically centered. Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done.

Min. Value: -08 Max. Value: +55 Recommended Value: +09

HSOF: Horizontal Size Offset for 60 Hz

Not Used For This Model

HPOF: Horizontal Position Offset for 60 Hz

Enter an NTSC-M circle test pattern via RF or video inputs. Change Horizontal Position till the picture is horizontally centered. Check and readjust Horizontal Position item if the adjustment becomes improper after some other geometric adjustments are done.

Min. Value: -08 Max. Value: +55 Recommended Value : -06

HTOF: Horizontal Trapezoid Offset for 60 Hz

Not Used For This Model.

GEOMETRY MENU

From the service menu by pressing the green button, geometry menu appears.

To select geometry adjust parameters, use or buttons. To change the selected parameter, use or buttons. Selected parameter will be highlighted.

Entire geometry menu parameters of AK30 CHASSIS are listed below.

VSIZ: Vertical Size for 50 Hz

Enter a PAL B/G circle test pattern via RF. Change VSIZ (Vertical Size) until horizontal black lines on both the upper and lower part of the test pattern become very close to the upper and lower horizontal sides of picture tube and nearly about to disappear. Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done.

Min. Value: 000 Max. Value: 063 Recommended Value for 4:3 mode 030 Recommended Value for 16:9 mode 063

VPOS: Vertical Position for 50 Hz

Enter a PAL B/G circle test pattern via RF. Change Vertical Position till the test pattern is vertically centered. Horizontal line at the center pattern is in equal distance both to upper and lower side of the picture tube. Check and readjust Vertical Position item if the adjustment becomes improper after some other geometric adjustments are done.

Min. Value: 000 Max. Value: 063 Recommended Value for 4:3 mode 014 Recommended Value for 16:9 mode 020

VSCO: Vertical S-Correction for 50 Hz

Not Used For This Model.

VCCO: Vertical Corner Correction for 50 Hz

Not Used For This Model.

HSIZ: Horizontal Size for 50 Hz

Not Used For This Model.

HPOS: Horizontal Position for 50 Hz

Enter a PAL B/G circle test pattern via RF. Change Horizontal Position until the picture is horizontally centered. Check and readjust Horizontal Position item if the adjustment becomes improper after some other geometric adjustments are done.

Min. Value: 000 Max. Value: 063 Recommended Value for 4:3 mode 032 Recommended Value for 16:9 mode 033

HPIN: Horizontal Pincushion for 50 Hz

Not Used For This Model.

HCCO: Horizontal Corner Correction for 50 Hz

Not Used For This Model.

HTRP: Horizontal Trapezoid for 50 Hz

Not Used For This Model.

VZSZ: Vertical Zoom Size for 50 Hz

Not Used For This Model.

WHITE BALANCE ADJUSTMENT

The following three parameters are used to make white balance adjustment. To do this, use a Colour Analyzer. Using WR (White point adjust for RED), WG (White point adjust for GREEN), WB (White point adjust for BLUE) parameters, insert the + sign in the square which is in the middle of the screen.

WR: White Point Adjustment for RED

Use this parameter to set the strength of RED in White.

Min. Value: 000 Max. Value: 063 Default Value : 030

WG: White Point Adjustment for GREEN

Use this parameter to set the strength of GREEN in White.

Min. Value: 000

50 HZ. 4:3 GEOMETRY ADJ.

50 HZ. 16:9 GEOMETRY ADJ.

60 HZ. 4:3 GEOMETRY ADJ.

Max. Value: 063 Default Value : 018

WB: White Point Adjustment for BLUE

Use this parameter to set the strength of BLUE in White.

Min. Value: 000 Max. Value: 063 Default Value : 020

BR: Bias for RED

Use this parameter to set the strength of RED in BLACK.

Min. Value: 000 Max. Value: 063 Default Value : 031

BG: Bias for GREEN

Use this parameter to set the strength of GREEN in BLACK.

Min. Value: 000 Max. Value: 063 Default Value : 031

APR: Automatic RGB Peak Regulation (APR) Threshold

The goal of the APR function (Automatic RGB peak regulation) is to compensate the spread of contrast between sources or programs by regulating the peak amplitude of RGB signals. This results in a picture with higher contrast whatever the input signal amplitude. Besides, APR increases the contrasts of pictures with low contrast and avoids the clipping at RGB output for pictures with high amplitude.

To enable APR, refer to OP3 in Option Bytes.

Min. Value: 000 Max. Value: 015 Default Value : 006

The following default values are the factory settings of the corresponding items. Except Volume, all values are restored when STANDARD button is pushed during no menu is displayed. Volume is set to its default value only if the A.P.S. bit is set when the TV is turned on.

+ 69 hidden pages

VESTEL AK30 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual