VESTEL 11AK49 Service Manual

Date

: 20/

06/2005

SERVICE MANUAL

UOC III AK49

Version : V1.0 Unit : Electronic Hardware Design

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TABLE OF CONTENTS

1. INTRODUCTION 4

1.1. Purpose 4

1.2. Scope 4

1.3. General Features 4

2. GENERAL DESCRIPTION 5

2.1. Introduction 5

2.2. System Building Blocks 5

2.2.1. UOC-III (Ultimate-One-Chip) 5

2.2.1.1. Fav & B_Svhs & F_Svhs 8

2.2.1.2. Scart1 8

2.2.1.3. Scart2 8

2.2.1.4. Scart3 9

2.2.1.5. VestelBus 9

2.2.1.6. Audio 9

2.2.1.7. Port Allocations 10

2.2.1.8. Power Management 11

2.2.1.9. Input & Output Performance 12

2.2.1.10. Feature Board 14

2.2.2. Audio Block 15

2.2.2.1. Audio Power Amplifier 15

2.2.2.2. Headphone Amplifier 17

2.2.2.3 Pop Noise Protection Circuit 18

2.2.3. Deflection & Display Block 19

2.2.3.1. Horizontal Deflection 19

2.2.3.2. Vertical Deflection 20

2.2.3.3. CRT Board 22

2.2.3.4. Rotation 23

2.2.3.5. X-RAY Protection 24

2.2.3.6. Dynamic Focus 24

2.2.3.7 Screen & Focus Short Circuit Protection 25

2.2.4. SMPS BLOCK 28

2.2.4.1. Primary Block 28

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2.2.4.2. Secondary Block 29

2.2.5 CABELING 31

2.2.6 CABLE SPECs 33

2.2.6.1 RGB CABLE 33

2.2.6.2 200V CABLE (with BSVM) 35

2.2.6.3 200V CABLE (with BSVM) 37

2.2.7 SAW FILTER 39

2.2.8 TUNER 40

3. AK49 CHASSIS MANUAL ADJUSTMENTS PROCEDURE 41

3.1 SMPS B+ADJUSTMENT 41

3.2 AFC ADJUSTMENT 41

3.3 FOCUS ADJUSTMENT 41

3.4 SCREEN ADJUSTMENT 42

4. AK49 CHASSIS PRODUCTION SERVICE MODE ADJUSTMENTS 43

5. MENU LANGUAGE TABLE 74

6.PICTURE MODES 75

7. CIRCUIT DIAGRAMS 79

8. APPENDIX 84

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Document History

Document

Versi

Date

on

Revision and

Status Prepared by Approved by

Review History

v1.0 20.06.2005 MUHAMMED M.

KAYA SERDAR GÜLTEN

File Name: AK49_SM_V1.0

KAGAN M. PANCAR

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1. Introduction

1.1. Purpose

This document is prepared for the UOC3 TV project and describes the whole system features and operating principles to be used in hardware design phase.

The document is based on “Device Specification UOCIII-Version 2.5” and “Introducing UOC-III” from

Philips Semiconductors.

1.2. Scope

The document covers detailed descriptions of AK49 chassis system building blocks.

1.3. General Features

AK49 is a 110? / 50 Hz. chassis which is capable of driving CRT sizes in the range of 24” – 33”, including realflat and 16:9 CRT’s . The chassis has the following main features;

? Remote Control ? Colour Standards ; PAL, SECAM, NTSC, ? Transmission standards ; B/G, L/L’ I/I’, DK, ? Teletex ; 10 pages, ? Intercarier/QSS sound proccessing, ? Multi-standard alignment free PLL tuning, ? PIP, PAP, POP, PAT, TAT ,

? CTI option , ? 2D Comb Filter ,2D/4H ? Headphone with volume control, ? SubWoofer option, ? 2 Full Scart with SVHS availability via Scart-2 , Scart-3 / BAV, FAV and F_SVHS /B_SVHS, ? BSVM option, ? Dynamic Focus option, ? Rotation (Tilt) option, ? NICAM/GERMAN Stereo, ? Virtual Dolby option, ? 2 x 10W (%10 THD), ? YPbPr input feature, ? TV-DVD Combi , ? IDTV , ? TV-R/HDD, ? EPG,

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2. General Description

2.1. Introduction

This chapter describes system building blocks and their detailed discriptions.

2.2. System Building Blocks

AK49 chassis main block are;

? UOC3 : Microcontroller + Video Proccessor + Sound Proccessor + IF+Teletext ? SMPS : SMPS Controller, SMT, Bridge Rect., Line Filters ? HV Block : FBT, HOT, Vertical Amplifier, Line Driver, EW Amp. ? AUDIO : Audio Amp., DAC, Comperator. ? CRT BOARD : RGB Amp. ? Feature Board : PIP, CTI IC’s.

2.2.2 UOC-III (ULTIMATE-ONE-CHIP)

UOC3 is composed of microcontroller, video proccessor, sound proccessor and IF blocks. So, there are digital and anolog parts in it named as Picasso and Cosmic respectively as shown below ;

UOC3 has standard and face down versions, pin squence differs between two version. After investigation of the pining it is decided to use face down version for layout compability.

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Block diagram of the TV System with face-down version is;

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2.2.2.1 FAV & BAV & B_SVHS & F_SVHS

B_SVHS and F_SVHS inputs can not be supported at the same time. FAV & B_SVHS_Y & F_SVHS_Y inputs use same CVBS input. (cvbs2/74)

B_SVHS_ C & F_SVHS_C input is C2/C3(70). FAV audio input is AUDIOin_5 L,R (94,95) and shared with F_SVHS. BAV video input is CVBS1 (81) and can not be supported with SCART3 at the same time. BAV audio input is AUDIOin_4 L,R (80,79) and shared with SCART3.

2.2.2.2 SCART1

SCART1 video input is (CVBS3/71) . SCART1 video input is also applied to Video Switch IC(TEA6415C) for PIP application.

SCART1 video out will use (IFVO/86) front_end video output, that output is also used as SCART3 video output via a buffer circuit.

SCART1 RGB/fblk inputs are R(51), G(50), B(49), FBLK(52) . SCART1 AUDIO input is AUDIOin_3 L,R ( 73,72) . SCART1 AUDIO output is AUDIOout_SR,SL (93,92). Same output also used as SCART3 Audio output.

2.2.2.3 SCART2

SCART2 video input is CVBS4 (78) . SCART2 video input is also applied to Video Switch IC(TEA6415C) for PIP application.

SCART2 supports SVHS input. SVHS / C input is C4 (77) , Y input is use same video input. SCART2 video output is CVBSO/PIP (65). That video output is selectable, all inputs can be selected to

be output from SCART2. SCART2 RGB inputs are R(59), G(57), B(58), FBLK/INSSW2 (54), except CTI/PIP option. At PIP application ;

- There are PIP_CVBS, SCART1, SACRT2, SCART3, FAV video inputs and RGB, FBLK inputs to PIP IC.

- If there is no CTI application, PIP output is applied to SCART2 RGB input directly.

- In case of PIP&CTI combined application, PIP output will be input to CTI IC as YUV. The YUV

output of CTI IC will be applied to R/Vin(59), G/Yin(57), B/Uin(58) as YUV.

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YPbPr input is possible via SCART2 RGB lines with an adaptor. In this case R/Vin(59), G/Yin(57), B/Uin(58) inputs can be used as;

- RGB,

- YUV,

- YPbPr inputs.

SCART2 audio inputs are AUDIOin_2 L,R ( 75) . SCART2 audio outputs are AUDIOout_HPR,HPL (67,66). That output is also selectable .

2.2.2.4 SCART3

SCART3 video input is CVBS1 (81) . That input will also be used as optional BAV video input. and applied to Video Switch IC(TEA6415C) for PIP application.

SCART3 video output will be SCART1 video output via a buffer circuit. SCART3 audio inputs are AUDIOin_4 L,R (80,79). These audio inputs will also used for optional BAV

L,R and VESTELBUS L,R audio inputs. SCART3 audio out will be through SCART1 audio outputs via a buffer circuit.

2.2.2.5 VESTELBUS(IDTV,DVD-Combi)

VESTELBUS video input is CVBS1 (81), so VESTELBUS will not be supported with SCART3 at the same time.

VESTELBUS RGB inputs are SCART2 RGB inputs, so in case of VESTELBUS option SCART2 RGB is not supported.

VESTELBUS UART input ;

- TXD TX (1),

- RXD RX (2),

- IRQ_DVB INT2 (3). VESTELBUS I2C input is standard I2C bus.

2.2.2.6 AUDIO

Main audio out is AUDIOout_LSR,LSL (69,68).

Selectable HP out is I2SD01 24) out to DAC. Subwoofer out is I2SD02 (25) out to DAC.

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2.2.2.7 PORT ALLOCATIONS

(32) (INT-0) REMOTE (31) (INT-1) TV_LINK (30) (Counter-Timer) PROTECTION (27) (I2S Word Select) I2S_WS (26) (I2S Clock) I2S_CLK (25) (I2S OUT2) I2S_Swoofer (24) (I2S OUT1) I2S_HP (23) (I2S-IN/OUT) WRITE-PROT. (22) (ON/OFF) ON/OFF+LED (21) (SCL) SCL (20) (SDA) SDA (18) (PWM) ROT/TILT (17) (PWM0) PAP_LOW (16) (PWM1) SW (15) (PWM2) S_RESET

(14) (ADC0) AV1_STAT (13) (ADC1) AV2_STAT (10) (ADC2) AV3_STAT/DVD SENSE (9) (ADC3) KEYB.+SERV. (7) (PWM3) MUTE (6) (PWM4) SAW_SW (3) (INT2) IRQ/DVB (2) (UARTBUS) RXD (1) (UART BUS) TXD

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2.2.2.8 POWER MANAGEMENT

The power consumption of UOC3 is ;

Only 3,3V_Stb is necessary for the start-up. IC internally produces 2,5V and 1,8V at the Standby mode. After start-up necessary 1,8V are produced by external regulators. So, we have 3,3V_Stb, 5V, 5V_Stb and 1,8V. for UOC3. We don’t have 8V. even for audio outputs (1,2V RMS achieved with 5V). All the voltages are produced by SMPS except 1,8V.

RESET :

1V8 digital and 1V8 analogue are produced by using 2V5 DECDIG-signal. DECDIG-signal is given

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to base of Q108 Transistor and base of Q114 Transistor. The collector voltage becomes 1v8. When the +3V3_stb voltage decreases below the 2V6 Q110 Transistor goes OFF condition so FETs become ON. Q107 FET shorts 1V8 digital to ground and system is reset condition. Another reset condition becomes when the S_Reset port is active. While S_Reset port is active, FETs become ON. 1V8 digital is shorted to ground.

All the supply architecture of the UOC3 is as follows;

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2.2.2.9 INPUT & OUTPUT PERFORMANCE

EXTERNAL INPUT - OUTPUT PERFORMANCE CVBS INPUT VOLTAGE

CVBS OUTPUT VOLTAGE

VIDEO OUTPUT IMPEDANCE RGB INPUT VOLTAGE AUDIO INPUT VOLTAGE AUDIO OUTPUT VOLTAGE AUDIO INPUT IMPEDANCE AUDIO OUTPUT IMPEDANCE PIN 8 SWITCHING Standard PRIORITY BETWEEN SCARTS Vestel Standard

RECEPTION PERFORMANCE USABLE MINIMUM SIGNAL LEVEL USABLE MAXIMUM SIGNAL LEVEL COLOUR KILLER LEVEL SOUND KILLER LEVEL SYNCHRONISING SENSITIVITY LEVEL FM GERMAN STEREO SENSITIVITY LEVEL NICAM STEREO SENSITIVITY LEVEL

BTSC STEREO SENSITIVITY LEVEL NO BTSC NOISE LIMITED SENSITIVITY LEVEL TELETEXT EYEHEIGHT LEVEL CLOSED CAPTION SENSITIVITY LEVEL NO CLOSED CAPTION AFC PULL IN RANGE TUNER RECEIVING RANGE

1 ? 0.15 V Luminance 700 ± 15 % mV

Sync 300 ± 15 % mV

p_p

pp

Burst 300 ± 15 % mVpp DC level 2 V dc

75 ± 10 % O 1 ? 15 % V 500 ? 15 % Mv 500 ? 15 % mV

p_p

rms

minimum 10 K? maximum 1 KO

50 dBµV 90 dBµV 32 dBµV 30 dBµV 35 dBµV 40 dBµV 40 dBµV

30 dB?V % 45

-500 KHz / +800 KHz ± 5 MHz

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2.2.2.10 FEATURE BOARD ( PIP & CTI )

PIP&PAP and CTI applications performed with that feature board. For PIP&PAP application Micronas SDA9488/SDA9489 and for CTI application Toshiba TA1366FG is used.

There is a socket on the board for external YUV input which will be used for DVD or IDTV application with PIP&PAP and CTI feature. There are switches on the board for adaptation of application configurations.

Only CTI Application

YUV output from UOC3 comes to CTI IC TA1366FG and goes back to UOC3 . CTI & IDTV or DVD

CTI & PIP Application

YUV output from UOC3 comes to CTI IC TA1366FG , then inputs to PIP IC SDA9488. Any desired external CVBS signal is directed to PIP IC via video switch and used for PIP picture on CTI applied video signal. That video signal goes back to UOC3 as YUV.

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2.2.3 AUDIO BLOCK

2.2.3.1 AUDIO AMPLIFIER

TDA8928J 2X10W class D amplifier is used for audio amplification. It is supplied by +14V and –14V to give 2X10W output to 8ohm. loads by %10 THD.

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Audio inputs Main_L and Main_R is applied via voltage comparator LM393 to amplifier. PWM swicthing outputs are then filtered by 33UH and 470NF.

SOUND PERFORMANCE SOUND CALL UP TIME Max. 4 sec. MAXIMUM AUDIO OTPUT POWER (RF INPUT) 10W MAXIMUM AUDIO OTPUT POWER (EXTERNAL INPUT) 10W THD AT MAXIMUM AUDIO OUTPUT POWER (RF INPUT) %10 THD AT MAXIMUM AUDIO OUTPUT POWER (EXTERNAL INPUT) %10 THD AT 50 mW AUDIO OUTPUT POWER (RF INPUT) %3 (IC spec.) THD AT 50 mW AUDIO OUTPUT POWER (EXTERNAL INPUT) %3 (IC spec.) SIGNAL TO NOISE RATIO (RF INPUT) 50 db. SIGNAL TO NOISE RATIO (EXTERNAL INPUT) 40 dB SIGNAL TO BUZZ RATIO 40 dB CROSSTALK: TV TO AV - AV TO TV 60 dB RESIDUAL SOUND (RF INPUT) 20 mW/rms RESIDUAL SOUND (EXTERNAL INPUT) 20 mW/rms FREQUENCY RESPONSE (RF INPUT) 100 Hz – 10 kHz FREQUENCY RESPONSE (EXTERNAL INPUT) 100 Hz – 10 kHz BASS FREQUENCY RESPONSE (RF INPUT) 10 ± 2 dB BASS FREQUENCY RESPONSE (EXTERNAL INPUT) 10 ± 2 dB TREBLE FREQUENCY RESPONSE (RF INPUT) 10 ± 2 dB TREBLE FREQUENCY RESPONSE (EXTERNAL INPUT) 10 ± 2 dB POP NOISE 5 Vpp HORIZONTAL HUM NOISE 15 mVrms VERTICAL HUM NOISE 15 mVrms VIDEO NOISE ON THE AUDIO OUTPUT 50 mVpp

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2.2.3.2 HEADPHONE AMPLIFIER

Headphone output is achieved by I2S out. I2S output is converted to anolog signal by DAC CS4334 and then applied to TDA1308T amplifier.

SubWoofer output is achieved by the same way, I2S ouptut is converted to analog signal by DAC CS4334 and applied to external SubWoofer amplifier board.DAC CS4334 will work at a rate of 32Fs MCLK/LRCK = 512, 256 or 128 and De-emphasis feature of CS4334 is disabled.

HEADPHONE PERFORMANCE MAXIMUM AUDIO OUTPUT POWER (RF INPUT) 22,5 ± 2,5 mWrms MAXIMUM AUDIO OUTPUT POWER (EXTERNAL INPUT) 22,5 ± 2,5 mWrms THD AT MAXIMUM AUDIO OUTPUT POWER (RF INPUT) %10 THD AT MAXIMUM AUDIO OUTPUT POWER (EXTERNAL INPUT) %10 THD AT 0.5 mW AUDIO OUTPUT POWER (RF INPUT) %1 THD AT 0.5 mW AUDIO OUTPUT POWER (EXTERNAL INPUT) %1

SIGNAL TO NOISE RATIO (RF INPUT) 40 dB SIGNAL TO NOISE RATIO (EXTERNAL INPUT) 40 dB

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2.2.2.3 POP NOISE PROTECTION CIRCUIT

This circuit is used to prevent pop noise in AC turn-off. While TV is working due to +14V. T1 is OFF . In turn-0ff situation BE voltage of T1 becomes negative and transistor goes to ON condition ,so it drives T2 and T2 pull-down mute pin to perform muting.

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2.2.3 DEFLECTION & DISPLAY BLOCK

2.2.3.1 Horizontal Deflection

Deflection block consist of following main parts, Horizontal driver transistor (Q601),

Horizontal driver (TR600), HOT (Horizontal Output Transistor) (Q600), FBT (TR601), E/W transistor (Q602), E/W coil (L601), E/W injection Coil (Bridge Coil) (L602), Linearity Coil (L603), Flyback Capacitors (C608, C607), S-correction capacitor (C615 ve C613), Modulated S-correction capacitor (C611),

Hdrive signal is buffered and applied to line driver transistor by a capacitor. Line driver produces necessary base currents, parallel diode to base series resistor speeds up the reverse base current.

UOC3 has soft-start and soft-stop features to have more safe operation. There are two base current adjustment resistors on the circuit. Collector current differs according to CRT sizes .

Tube dependent components are choosen to fit best picture performance by keeping; 11,5 usec. Flyback time,

Max. 1300V. collector voltage (peak-detect mode measurement) Max. 500V. at the diode modulator cathode (D605). Max. 20V. (peak-detect mode measurement) at the E/W transistor drain. Max. 200V video B+ voltage.

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2.2.3.2 Vertical Deflection

TDA8359J (IC502) vertical amplifier is used for vertical deflection. It’s 3,2A. current capability makes it enable to drive all 50Hz. CRT screen sizes.

Differential vertical drive signals; resistor network at inputs are chosen CF type to minimize temperature sensitivity of TV set. Those resistors can be changed to MF type in case of heat run failure.

Power resistor R633, R634 values will change according to CRT sizes.

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2.2.3.3 CRT Board

TDA6108AJF is used as RGB amplifier. Main feature of that triple amplifier is the increased fixed gain of 81. It’s 8 MHz. Bandwidth at 100Vpp video signal makes it enable to use in all 50Hz. TV

applications.

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CRT board have single and double focus CRT socket options. There are CC type 1,5K series flash current limiting resistors (R903, R904, R905) on the RGB lines. In

addition to resistors BAV21 clamp diodes (IC901,IC902,IC903) are introduced. Spot Killer circuit pulls G1 to –200V by Q700 at turn off instant. BSVM amplifier circuit modulates the beam to have sharper images at the adges of CRT. Basicly, it

amplifies the software delayed controlled BSVM signal and apply it to BSVM winding of neck.

2.2.3.4 ROTATION

PWM rotation output of UOC3 is first converted to DC then applied to rotation circuit. OPAMP LM358N (IC600) and medium power transistors (Q601, Q602) performs DC amplification necessary for rotation coil.

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2.2.3.5 X-RAY PROTECTION

This circuit is used to protect the system X-ray caused by HV. While Anode voltage is bellow 33kv, T1 is off due to 80 volt because BE voltage of T1 becomes negative. While Anode voltage is above 33 kv. 80 voltage increases, it becomes approximately 90 volt. At that condition T1 is ON due to 90 volt because BE voltage of T1 becomes positive, so it drives protection.

2.2.3.6 DYNAMIC FOCUS

E/W injection signal is converted to sinus shape after it passes LC circuit. Then the signal is amplified via coil and applied to Dynamic focus.

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2.2.3.7 SCREEN & FOCUS SHORT CIRCUIT PROTECTION

Above circuit is used for protection against screen & focus grounding. Basicly the base of PNP transistor Q609 is connected to screen&focus potentiometer of FBT, in another words FBT focus pack is connected to ground via R654. The voltage at the base of that transistor is

normally higher then the zener voltage at the emitter. When any short circuit occurs at focus or screen the base voltage is decreased to a value lower then zener voltage, that forces transistor to conduction and trigers another circuit which will force UC to protection mode. In protection mode LED becomes RED and remote control does not work.

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GEOMETRY PERFORMANCE

ASPECT RATIO NON-LINEARITY (Horizontal & Vertical) % 10 DE-CENTERING (Horizontal & Vertical) % 1 OVER-SCANNING (Top, Bottom, Left, Right) % 2,5 UNDER-SCANNING (Top, Bottom, Left, Right) % 97,5 RASTER ROTATION / TILT 3 mm. PARALELLOGRAM (Left counter, Right Counter) % 1,5 TARPEZIUM (Horizontal, Vertical) % 1,5 OUTLINE DISTORTION (Top, Bottom, Right, Left outline distortion) % 1,5 INNER DISTORTION (Top, Bottom, Right, Left inner distortion) % 1,5 BENDING (Top right, top left, bottom left, bottom right corner bending) % 10

EHT AND DEFLECTION PERFORMANCE

ANODE VOLTAGE CRT spec. BEAM CURRENT CRT spec. HEATER VOLTAGE CRT spec. EHT REGULATION % 1,5 HORIZONTAL FLYBACK VOLTAGE HOT spec. HORIZONTAL FLYBACK TIME 12 usec. Max VERTICAL FLYBACK VOLTAGE Vertical IC spec. VERTICAL FLYBACK TIME 1 msec. Max SCREEN VOLTAGE CRT spec. FOCUS VOLTAGE CRT spec. FOCUSING

PICTURE PERFORMANCE

IMAGE CALL UP TIME 9 sec. Max WHITE BALANCE x=285 ± 3 , y=293 ± 3 MAXIMUM LUMINANCE 120 ± 10 Cd/m² VIDEO BANDWIDTH 3,5 Mhz. Min SIGNAL TO NOISE RATIO 40 dB min 2T PULSE WIDTH 200 ± 40 nsec OVER-SHOOT % 10 max UNDER-SHOOT % 10 min CONTRAST RATIO 60 min CONTRAST LEVEL 90 – 100V min CROSSTALK: TV TO AV - AV TO TV Should be not visible TOLERANCE TO VISION OVER MODULATION No effect up to %30 modulation COLOUR PURITY Not visible from 1,8m distance COLOR SCYNCHRONISATION 0,5 sec delay max. PICTURE SWAY No picture shake allowed MOIRE No moire effect allowed

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RINGING No visible effect allowed SMEARING % 10

FLICKER INTERLACE AND JITTER No jitter is allowed

HANOVER BLIND No hanover blind is allowed HUM ON VISION No hum bars allowed in picture FLYBACK LINES No visible flyback line allowed FOLDOVER No foldover in the picture allowed CURTAIN EFFECT No oscillation in picture allowed MANHEIM EFFECT % 1,5 max MISCONVERGENCE 1,8 max.

No flicker effect caused by brightnes control allowed