Philips tm_ftv1.9ee_aa__126 Datasheet

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Page 1

Colour Television Chassis

CL 965320690-164.eps

020999

FTV1.9EE

Contents Page

1 Introduction 2 Mechanical instructions

3. Blockdiagram 4Service modes 5Audio 6Video 7 Control 8 Featurebox 9 Double window 10 Teletext 11 Audio Video buffer 12 Front I/O panel 13 Power supply 14 Switch panel 15 LED panel

2 5 9 10 22 31 46 49 58 63 64 71 73 79 80

Copyright reserved 1999 Philips Consumer Electronics B.V. Eindhoven, The Netherlands. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips.

Published by JvR 9969 Service PaCE Printed in The Netherlands Subject to modification 5 3122 785 10033

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2 1. Introduction FTV1.9EE Receiver Box

1. Introduction

CONFIGURATIONS

TV-CONFIGURATION

R, G, B, HS, VS

RECEIVER BOX

µP µP

MONITOR-CONFIGURATION

PERSONAL COMPUTER

µP µP

CONFIG_IDENT

DIS_RC_5

UART

R, G, B, H, V

CONFIG_IDENT

DDC

DISPLAY BOX

The FTV1.9 is the successor of the FTV1.5, which had to be cheaper than the FTV1.5 with as much as possible "re-use" of the FTV1.5. In this set, as in the FTV1.5, the Small Signal Panel (SSP) of the GFL is used. The Flat TV 1.9 is built around the E-Box (= Receiver Box) and the 42" Monitor (= Display Box). Within the Monitor a Fujitsu Plasma Display Panel, version 5, is used. For the FTV1.9, the E-box is used in the TV-configuration only (Monitor connected to the E-box). The FTV1.9 family has been set up for Europe, USA, Asian and LATAM markets. The Europe type (FTR9952) consists of 2 Versions:

• FTV1.9 Western Europe stroke /12

• FTV1.9 France/UK stroke /19 The E-Box and the Monitor are separate devices, which can also be sold and serviced separately. The E-box, can be serviced by using a test pattern coming from the FBX inside the E-box or via a PC/laptop by using ComPair via the bi-directional LED at the front. The Display-box or a PC-monitor is used only as a display. In case the E-box goes into protection, there is the possibility to read out the content of the error code buffer by means of the:

• DST : Transmit the command: "DIAGNOSE - x - OK" which gives you the error-code of the error buffer at position x

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The E-Box is based on the electronic box of the FTV1.5, however several parts have been adapted.

• Two panels have been moved to the Monitor: – Audio amplifier. – Monitor supply; Preconditioner and VsVa supply.

• The Dolby processing has been deleted.

• The small signal electronics is "taken over from/based upon" the GFL.

Existing small signal parts have been adapted and new small signal parts have been developed.

• Development of 2 new panels to optimise interfacing with the monitor: – AV buffer. – E-box supply.

• Development of several new panels to adapt to the mechanical design of the FTV1.9: – Front I/O panel. – LED panel. – Switch panel.

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FTV1.9EE Receiver Box 1. Introduction 3

1.1 Short description of the main functional parts.

1.1 Short description of the main functio nal part s.

• Mains cord (detachable).

• Antenna cable. – Ferrite's added to reduce the radiation.

• Switch panel E-box (FL).

• Led panel E-box (LE). – Red and Green indication controlled by the µP.

• AV Buffer (AVB).The function of this panel is to interface the signals between the panels inside the Receiver box, and to interface the Receiver- with the Display box via a VGA cable. – Control / RC5. – RGB selection. – Sandcastle generator. – Audio select. – YUV to YC decoder. – VGA_in and VGA_out connector.

• E-Box supply (SU). – Small signal set supply (5V, 8V6, 12V, 40V) and

Standby supply (+5V_STBY).

• Front panel box (AV). – Front I/O's (Y/C Hosiden & CVBS CINCH video inputs,

L/R CINCH audio inputs, headphone output, IR transmitter LED for Service Dealer Tool, IR receiver for RC5).

• Small signal panel (S). – Front end (S1). – Stereo Decoder (S2). – Sound processing (S3). – Headphone amplifier (S4). – Video processing (S5). – Video control (S6). – Control (S8).

• Incredible Sound (AY). The incredible sound circuit electronically generates a phase and sound level relation between the left and right signal, in such a way that to the human mind it sound as if the sound is actually coming from the far left or right side.

• Euro I/O (I). – SCART I/O's. – CINCH audio output. – video and audio matrices for source selection.

• Eco NICAM (G). – audio (NICAM) decoding.

• Double window module (P). – Combination of 2 video signals to DW, or Multi PIP. – Tuner, IF and video processor for the sub channel.

• Feature box (FBX). – Digital scan for 50 Hz systems (PAL/SECAM). – Multi PIP processing. – Vertical and horizontal zoom functions. – Line flicker reduction.

Personal notes

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4 1. Introduction FTV1.9EE Receiver Box

1.2 Audio/Video Diversity

• Western-Europe /12: FQ916ME.

• France/UK /19: FQ916DMF.

Personal notes

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FTV1.9EE Receiver Box 2. Mechanical instructions 5

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CL96532069_124.EPS

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2.1 Introduction:

2. Mechanical instruction s2.1Introduction:

There are pre-defined service positions for the following panels:

1. SSP (copper side).

2. EURO/IO panel.

3. TXT panel.

4. FRONT/IO panel.

5. SUPPLY panel.

6. AV BUFFER panel.

7. NICAM panel.

8. FEATURE BOX panel.

9. DOUBLE WINDOW panel.

1. All panels are now accessible (except for the SSP).

SMALL SIGNAL panel (SSP).

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Figure 2-1

Before these panels can be accessed, the top cover has to be removed:

1. For safety reasons first unplug the Mains cable.

1. Remove the 8 fixation screws of the top cover: 2 x 3 at the sides, 2 at the rear.

2. Remove the top cover (during removal push it slightly backwards).

Front endFront I/O LED AV-Buffer Supply

Switch TXT

Double Window

Figure 2-3

1. Place Receiver Box on its side.

2. Remove the 8 fixation screws of the bottom cover.

3. The copper side of the SSP becomes accessible. Here the I/O's of the several modules easily can be checked. For the FEATURE BOX (FB) and the DOUBLE WINDOW (DW) panel this must be the information to decide to order a new panel.

4. For the NICAM panel it can give some information whether this panel is malfunctioning.

EURO/IO panel.

EURO I/OFeature BoxNICAMSSP

Figure 2-2

CL96532069_122.EPS

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Figure 2-4

1. Remove the metal rear cover by unscrewing in total 15 screws: 6 at the rim, 3 at the EURO/IO panel and 6 at the sub_D and CINCH connectors.

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6 2. Mechanical instructions FTV1.9EE Receiver Box

Supply

2.1 Introduction:

2. Now the EURO/IO panel becomes accessible at the component side.

EURO I/O

Figure 2-5

1. Remove the copper shielding from the antenna-input connector [1].

2. After lifting the bracket from the SSP [2], it can be rotated in such a way that also the copperside becomes available [3] (bracket can also be removed completely if necessary).

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FRONT/IO panel.

Front I/O Switch

Figure 2-7

LED

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TELETEXT panel (TXT).

TXT

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Figure 2-6

1. Remove the 2 fixation screws at the top of the bracket [1].

2. Bracket (with panel) can now lifted and placed upon the front metal wall [2].

1. First remove the front cover: 2 x 2 screws at the sides and 2 at the top.

2. FRONT I/O, LED and SWITCH panels now can be serviced.

SUPPLY panel.

CL96532069_128.EPS

Figure 2-8

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FTV1.9EE Receiver Box 2. Mechanical instructions 7

AV-Buffer

2.1 Introduction:

The copper side of this panel is fully accessible at the outer side of the Receiver Box. Be aware that the mains voltage is always present on this board, even if the mains switch is OFF !

AUDIO VIDEO BUFFER panel.

Personal notes

CL96532069_129.EPS

Figure 2-9

1. First remove the adjacent SUPPLY panel. This can be done by removing the 2 fixation screws [1] and lifting this panel from its bracket [2]. Rotate this panel in such a way that the copper side is positioned (in an electrical safe way) aside of the Receiver Box [3].

2. Now the copper side (SMD or A-side) of the AV-BUFFER panel becomes accessible. All service test points are positioned on this A-side.

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NICAM panel.

This panel can be checked via the I/O connector on the SSP. For service properties (exchanging parts) see chapter 2.2.

FEATURE BOX.

This panel can be checked via the I/O connector on the SSP. For service properties (exchanging parts) see chapter 2.2.

DOUBLE WINDOW panel.

This panel can be checked via the I/O connector on the SSP. For service properties (exchanging parts) see chapter 2.2.

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8 2. Mechanical instructions FTV1.9EE Receiver Box

2.2 Exchanging parts

NICAM

Double Window

Feature Box

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Some parts of the FTV1.9 Receiver Box must be exchanged if defective:

• DOUBLE WINDOW panel.

• FEATURE BOX. All these panels can be lifted from the SSP by releasing the 2 connector slots sidewards while lifting.

Personal notes

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FTV1.9EE Receiver Box 3. Block diagram 9

2.2 Exchanging parts

3. Block diagram

For the block diagram see Service Manual Chapter 6. The power is supplied by the E-box supply (Flyback converter). The mains input voltage has a range between 95 and 264 VAC The output voltages are:

• 33 V

• 12.8 V

•8.6 V

•5.1 V

• 5 VSTNBY

• POR -signal (reset-pulse for the µP)

The controls located on the SSP panel, are activated by RC5 signals from the remote control receiver on the LED panel Ebox. Several external sources can be connected to the E-box via:

• 3 SCART inputs at the Euro I/O.

• Several connections at the front (CVBS, YC, Headphones and audio-CINCH'es).

• VGA input connector at the AV Buffer panel.

The Tuner is suitable for the reception of VHF1, VHF3, UHF, Schannels and Hyperband. The output supplies the CVBS picture and a mono or stereo audio signal. The following Tuner types are used within the E-box :

• FQ 916 DME/PH MK2 BG/L/M used in the Western Europe set /12

• FQ 916 DMF/PH MK2 BG/L/L'/I used in the France/UK set /19.

The NICAM module (G) has been added to demodulated the SIF - NICAM signals. The Audio signals coming from the front I/O panel are processed by IC7650 (TDA9860) and are passed through to selector IC7901 (TEA6422). This IC switches the processed audio signals or the audio signals coming from the VGA_input connector to the output CINCH for the monitor. The video signal coming from the Front I/O panel or tuneroutput are first passed through a COMB filter before they are processed by the Video Control IC7352 (TDA9114). The YUV output signal and the sync-signal H/V are transferred to the DW panel. On the DW-panel there is another tuner-section: UV12160. The output signal from the DW-tuner is processed by the PIPO (Picture In Picture Out) processor SAA9077. The output of the TDA8601 is offered to the FBX4 to convert the signals to 2fh and to process features like natural motion; DNR etc. On the SSP panel the YUV signals are converted into RGB signal by Video Control IC7500. OSD info (Teletext) is added, before the signals are send to the AV Buffer panel. Selector IC7600 switches these RGB-signals or the RGB-signals coming from the VGA_in connector to the VGA-out connector.

Personal notes

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10 4. Service modes FTV1.9EE Receiver Box

4.1 Introduction

4. Service modes4.1Introduc tion

The E-Box and the Monitor are separate devices, which can also be sold and serviced separately. The E-box, as a stand-alone unit, can be serviced by using a test pattern coming from the FBX inside the E-box or via a PC/ Laptop by using ComPair via the bi-directional LED at the front. The Europe type (FTR9952) consisting of 2 Versions:

• FTV1.9 Western Europe stroke /12

• FTV1.9 France/UK stroke /19 In this chapter the following paragraphs are included:

1. Introduction

2. Test points

3. Dealer Service Tool (DST)

4. Service Modes

5. Error code buffer and error codes

6. Options in the Service Alignment Mode

7. Protections

8. Electrical alignments

9. Software alignments

The “Blinking Led” procedure

This procedure is not applicable on the "TV Configuration" of the FTV1.9. It is only valid for the "Monitor Only Configuration" (see SM Display Box).

Personal notes

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FTV1.9EE Receiver Box 4. Service modes 11

4.2 Test points

The FTV1.9 chassis is equipped with test points in the service printing. These test points are referring to the functional blocks:

• B1-B2-B3, etc.: Test points for the AV Buffer circuit (AVB)

• TP1-TP2-TP3, etc.: Test points for the Feature Box (F)

• S1-S2-S3, etc.: Test points for the Double window (P) and the Small Signal Panel SSP (S1-S8)

• P1-P2-P3, etc: Test points for the Supply E-box (SU)

Measurements are performed under the following conditions: Video: colour bar signal; Audio: 3 kHz left, 1 kHz right

Personal notes

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12 4. Service modes FTV1.9EE Receiver Box

4.3 Dealer Service Tool (DST)

For easy installation and diagnosis the dealer service tool (DST) RC7150 can be used. When there is no picture (to access the error code buffer via the OSD), DST can display the contents of the entire error code buffer, via the send-LED, on its own LC display. The ordering number of the DST (RC7150) is 4822 218 21232.

Installation features for the dealer

The dealer can use the RC7150 for programming the TV-set with pre-sets. 10 Different program tables can be programmed into the DST via a GFL TV-set (downloading from the GFL to the DST; see GFL service manuals) or by the DST-I (DST interface; ordering code 4822 218 21277). For explanation of the installation features of the DST, the directions for use of the DST are recommended (For the FTV1.9 chassis, download code 4 should be used).

Diagnose features for service

FTV1.9 sets can be put in two service modes via the RC7150. These are the Service Default Mode (SDM) and the Service Alignment Mode (SAM).

Personal notes

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FTV1.9EE Receiver Box 4. Service modes 13

4.4 Service Modes

Below described sequence is only valid for the "TV Configuration", when a Monitor is connected to an E-box. When you have to service the "Monitor Only Configuration" , please check chapter 5 in the Training Manual of the Display Box.

Service Default Mode (SDM)

The purpose of the SDM is:

• provide a situation with predefined settings to get the same measurements as in this manual.

• Inspect the error buffer.

• Possibility to overrule software protections via the service pins (caution: override of software protections! ).

Entering the SDM:

• By transmitting the "DEFAULT" command with the RC7150 Dealer Service Tool (this works both while the set is in normal operation mode or in the SAM).

• When using a standard RC: sequence 062596 followed by the "MENU" key.

• By short-circuiting the SDM pin on the SSP panel (see TM Receiver Box chapter 4).

Exit the SDM: Switch the set to Standby. Note: When the mains power is switched off while the set is in SDM, the set will switch to SDM immediately when the mains is switched on again. (The error buffer will not be cleared). The SDM sets the following pre-defined conditions:

• Volume level is set to 25% (of the maximum volume level).

• Linear Audio and Video settings are set to 50%.

• Colour temperature is set to normal.

The following functions are "overruled" in SDM since they interfere with diagnosing/repairing a set

• Video blanking.

• Slow demute.

• Anti-ageing.

• Automatic switch to "Standby" when H- and/or V-sync signals are lost.

All other controls operate normally.

Special SDM functions

Access to normal user menu: Pressing the "MENU" button on the remote control will enter the normal user menu (TV lock, Installation, Brightness, colour and contrast) while "SER" remains displayed in top of screen). Pressing the "MENU" key again will return to the last SDM status. OSD: Pressing the "OSD" button on the remote control shows all OSD information (incl. error buffer).

Service Alignment Mode (SAM)

The purpose of the SAM is to align and or adjust settings. Entering the SAM-menu:

• By pressing the "ALIGN" button command on the RC7150 DST followed by code 3140 and "OK". Note: when pressing the "ALIGN" button, point to the IR-receiver of the Display Box but after that (for entering the code, etc.), point to the IR-receiver of the Receiver Box!

• Standard RC sequence 062596 followed by the key "OSD".

• By short-circuiting the SDM pin (connector S98) on the SSP panel (caution: override of software protections! ).

Exit the SAM: Push the "STANDBY" button on the Remote Control. Note: When the mains power is switched OFF while the set is in SAM, the set will switch to SAM immediately when the mains is switched ON again. (The error buffer will not be cleared). In the SAM the following information is displayed on the screen:

--------------------------------------------------

E-box Date : Id: (1) Operation hours : (2) Errors (3) Defect. Modules : (4) Reset Error Buffer (5) Functional Test E-box (6) Alignments E-box (7) Display Info D-box (8)

--------------------------------------------------

Explanation notes/references: (1) Date : dd-mm-yy Software identification of the main micro controller (F19EBC X.Y_#####)

• F19E is the chassis name for FTV1.9 E-box

• B is the region identification

• C is the language cluster

• X = (main version number)

• Y = (subversion number)

• ##### are the last 5 digits of the 12nc number

(2) Operation hours: Normal display operation in hours (resolution 0.5 hrs) (3) Errors: The contents of the error buffer (max. 10 errors) displayed on 2 lines. The last error that occurred is displayed at the most left position. When the errorlist is empty " No errors" is displayed. (4) Defect. Module: The defective module, associated with a nr. according to the following table:

Nr Module-name Diagram

1 Control S8 - Main processor 7200 2 Frontend S1 - Main tuner 1300 3 Source Select Europe I2 - Audio selector 7822 4 Video Processing (SSP) S5 - 7352 5 Video controller S6 - 7580 7 2CS decoder S2 - 7600 8 Nicam decoder G - 7501 9 Audio control S3 - 7650 12 Teletext AQ - 7451 13 Feature box F - micro-processor 7505 14 16:9 processor P - 7860 16 Source Select Global I1 - Video selector 7823 17 Global Sound Decoder G - Multi FM selection 7630 20 Double Window P 21 BTSC Decoder G- 7550 22 Closed Caption (USA) BC

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14 4. Service modes FTV1.9EE Receiver Box

4.4 Service Modes

Nr Module-name Diagram

23 HD Module (USA) AO 56 AV Buffer AVB1 or AVB4

Exceptions: – No errors then "None" is displayed – Errors caused by more than 1 module then "Unknown" is

displayed

– Display of "SW protection" or "HW protection" if only this

error is reported otherwise display of the defective module

according the list. (5) Reset error buffer E-box (6) Functional test E-box: All IC devices are checked. No acknowledge results in a particular device error report. (7) Alignments E-box: Menu control (8) Display Info D-box: Display service data (Menu control) This is the main menu of the Service Alignment Mode screens, which has the following structure:

Alignments E-box

The Service Alignment menu has the following items :

• General, see 'General menu control' below.

• Options, see 'Options menu control' below.

• Option number, see 'Option number menu control' below.

•Store.

General Menu Control

The General Menu has another 7 menu-items of which White Drive and Luminance Delay have several sub-items.

•White Drive

– Testpattern : ON/OFF

–Red

– Green

–Blue

• Adjust Peak White Limiter

• Input level Stereo Decoder

• Stereo Channel Separation

• Luminance Delays

– Lum. Delay PAL

– Lum. Delay SECAM

– Lum. Delay NTSC

• FBX Test Pattern : ON/OFF

• Contrast

Options Menu Control

The Options Menu has another 7 menu-items of which 5 items have several sub-items.

•TV Systems

– FV916MG

–FQ916MR

– FQ916(D)MF

– FQ916(D)ME

–FQ936D

–FQ944D

– Chinese Tuners

–FS988

• Stereo Decoder

– NICAM type [selection ]

– Not available

–BG or I –BG + I

– Eco NICAM – 2 CS [Yes/No ] – Global [Yes/No ]

• Double Window – DW Available [ Yes/No ] – Mosaic [Yes/No ]

• Video Repro – Combfilter [ Selection ]

– Not Present

– SAA4961 – Dynamic Contrast [ Yes/No ] – Digital Panorama [ Yes/No ] – Auto Format FBX [Yes/No ]

• Source Select – SS type [ Selection ]

– Europe – Global

• Teletext – TXT [Yes/No] – PDC/VPS [Yes/No] – TXT Pre-set Table [Yes/No]

• Easy link [Yes/No ]

Option number Menu control

The Options Number Menu has another 2 menu-items of which both items have several sub-items.

• HW Opt Nr : 4 numbers of 5 digits

• SW Opt Nr : 2 numbers of 5 digits

The table below contains the default values of the HW and SW option numbers.

Destination PAL+

Europe No 01024-1

" Yes 01024-1

France No 01025-1

" Yes 01025-1

HW Option number

14353-2 10624-3 16452-4

14353-2 14592-3 16452-4

14353-2 10624-3 16452-4

14353-2 14592-3 16452-4

SW Option Number

00000-1 04884-2

00000 04884

Store

Stores the changed item(s) in the NVM.

Display Info D-box

In this screen the menu of the monitor is displayed on the PDP:

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Id: F19DE11.0_12345 (1) Operation Hours: LLLLL (2)

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FTV1.9EE Receiver Box 4. Service modes 15

4.4 Service Modes

Errors: 14 08 02

-------------------------------------------------Software identification of the main micro controller (F19DBC X.Y_#####)

• F19D is the chassis name for FTV1.9 Display

• B is the region identification

• C is the language cluster

• X = main version number

• Y = subversion number

• ##### are 5 digits of the serial numberr (2) Operation hours: Normal display operation in hours (resolution 1 hrs) (3) Errors: The contents of the error buffer (max. 10 errors). The last error that occurred is displayed at the most left position. When the errorlist is empty "No errors" is displayed. Access to normal user menu: Pressing the "MENU" button on the remote control will enter the normal user menu (TV lock, Installation, Brightness, colour and contrast) while "SAM" remains displayed in top of screen. Pressing the "MENU" key again will return to the last SAM status. OSD: Pressing the "OSD" button on the remote control shows all OSD information (incl. error buffer). Access to SDM: Pressing the "DEFAULT" button on the DST SAM menu control: Menu items can be selected with the "UP" or "DOWN" key. Entry into the selected items (sub menus) is done by the "LEFT" or "RIGHT" key. The selected item will be highlighted. With the same "LEFT/RIGHT" keys, it is possible to increase/ decrease the value of the selected item. Return to the former screen by pushing the "MENU" button. The item values are stored in NVM if the sub menu is left.

Customer Service Mode

FTV1.9 sets are equipped with the "Customer Service Mode" (CSM). CSM is a special service mode that can be activated and de-activated by the customer, upon request of the service technician/dealer during a telephone conversation in order to identify the status of the set. This CSM is a 'read only' mode, therefore modifications in this mode are not possible. Entering the Customer Service Mode:

• By pressing simultaneously the "LOCAL MENU" button on the local keyboard and the button (Mute) on the RC.

Exit of the Customer Service Mode:

• pressing any key on the remote control handset (except "P+" or "P-")

• switching off the TV set with the mains switch.

The screen has the following set-up:

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CUSTOMER SERVICE MENU 1

1. SW Ver.

2. Code 1

3. Code 2

4. PP Volume

5. PP Colour

6. PP Brightness

7. PP Contrast

8. PP Headphone volume

9. Sharpness

10. Child lock

11. External Center Sound

-------------------------------------------------Pressing the "P+" button on the RC shows page 2 of the CSM. Pressing "P-" shows again page 1 of the CSM.

-------------------------------------------------CUSTOMER SERVICE MENU 2

1. Incredible Sound

2. DNR

3. Noise Figure

4. Colour System

5. TV System

6. Audio System

7. Tuned bit

8. DVD/Photo CD

9. Sleep Timer

10. On Timer

-------------------------------------------------Display in the [MenuItems] field:

1. Software Identification: AAA=Chassis name, BB=Function name, C=Language cluster, X=main version nr. Y=sub version nr.

2. The last 5 error nr's in the error buffer(This line will be empty when there are no errors)

3. The first 5 error nr's in the error buffer.(This line will be empty when there are no errors)

4. Personal preference value of the volume

5. Personal preference value of the colour

6. Personal preference value of the brightness

7. Personal preference value of the contrast

8. Personal preference value of the headphone volume

9. Sharpness level

10. Child Lock status On/Off indication

11. Dolby Center Sound status On/Off indication

12. Incredible Sound status On/Off indication

13. DNR status

14. Indication of the signal quality

15. Colour System of selected program: PAL, SECAM or NTSC

16. Video system of selected program: BG, DK, I, L, M38.9 or MN

17. Audio system of selected program: Sound Muted, Mono, Stereo, Dual I, Dual II, Digital Mono, Digital Stereo, Digital Dual I, Digital Dual II

18. Indication of whether the selected program is Tuned or not

19. Indication for whether or not DVD/Photo CD id selected

20. Only if the [value] of [SleepTimer] is NOT "0"

21. Only if the [starttime] of [OnTimer] is defined

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16 4. Service modes FTV1.9EE Receiver Box

4.5 Error code buffer and error-codes

The error code buffer contains all errors detected since the last time the buffer was erased. The buffer is written from left to right. In case of non-intermittent faults, clear the error buffer before starting the repair to prevent that "old" error codes are present. If possible, check the entire content of the error buffers. In some situations an error code is only the RESULT of another error code (and not the actual cause). Note: a fault in the protection detection circuitry can also lead to a protection The error code buffer will be cleared in the following cases:

• exiting SDM or SAM with the "Standby" command on the remote control

• transmitting the commands "DIAGNOSE-9-9-OK" with the DST.

The error buffer is not reset by leaving SDM or SAM with the mains switch. Examples: ERROR: 0 0 0 0 0 : No errors detected ERROR: 6 0 0 0 0 : Error code 6 is the last and only detected error ERROR: 5 6 0 0 0 : Error code 6 was first detected and error code 5 is the last detected (newest) error

Error code Description Others

51 I2c slow bus error I2C slow bus 64 LTP (SSP) TDA9177 91 Data Receive Error

between Monitor and E-box

92 Audio Source selector

(AV buffer)

93 I/O expander (AV

buffer)

Special

TEA6422

PCF8574AP

Error code Description Others

04 Non Volatile Memory 24C16 06 IF (SSP) FQ916ME 10 / 11 Audio matrix (Eco

Euro I/O)

13 Toshiba mP (Eco Euro

I/O)

15 Video processor

(XX44=Palplus) (SSP) 16 Video controller (SSP) TDA4780 19 2CS Stereo Decoder

(SSP) 20 3D eco Nicam

demodulator/decoder 21 / 22 Sound processor L &

R (SSP for non-Dolby

version) 28 IVT3 (TXT panel) SAA5270 29 FBX processor (FBX4) 87C654 34 Tuner (Double

Window) 37 Double Window SAB9077 38 I/O expander (Double

window) 39 Video processor

(Double Window) 44 5V supply error 5V supply 45 8V supply error 8V supply 49 Video matrix (Eco

Euro I/O)

TEA6430

TMP47C443N

TDA9144/43

TDA9840

3D SAA7282

TDA9860

UV1216E

PCF8574A

TDA9143

TEA6417

Personal notes

Page 17

FTV1.9EE Receiver Box 4. Service modes 17

4.6 Options in the “Service Alignment Mode”

4.6 Option s in the “Service Alignment Mode”

CurrentServi ceSettings Options (NVM)

menus attributes Values associated

Service Options Menu

Video Reproductions

TVSystem Options Menu

Stereo Decoder Options Menu

DW Options Menu

Source Select Options Menu

Service Number Menu

easylink yes, no easylink = on, off

combfilter not present, combfilter = on, off

SAA4961 palplus_present yes, no palplus = on, off frontend type FV916MG frontend =

FQ916MR = FQ916MR

FQ916(D)MF = FQ916(D)MF

FQ916(D)ME = FQ916(D)ME

FQ936D = FQ936D

FQ944D = FQ944D

Chinese Tuner = FQchina

FS988 = FS988 nicam_type not available,

2 CS yes, no twochannel = on,

Global yes, no soundexpander =

dwavailable yes, no dwavailable = on,

multipip yes, no multipip = on, off sstype Euro sourceselect =

picturemute yes, no picturemute = on,

standby_on_tog gle

virgin yes, no virgin = on, off wss yes, no wss = on, off vip_ltp_present yes, no vip_ltp = on, off pipavail yes,no pip = on, off txt_region west, east txtregion = west,

as_txt_preset_ta ble

BG or I, BG + I ,

Eco Nicam

Global = global

yes, no standbytoggle =

yes, no aci = on, off

attributes of Options

FV916MG

nicam = on, off nicamtype = single, bi, eco

off

on, off

off

europe

off

on, off

east

In case the EAROM (NVM) has to be replaced, all the options will also require setting. To be certain that the factory settings are reproduced exactly, the option numbers have to be set. These numbers can be found on a sticker at the inside of the E-Box.

• The “HW Opt Nr” represents all hardware (service) related options. The format of this value is a line with 20 digits and is represented as 4 numbers of 5 digits.

• The “SW Opt Nr” represents all software (dealer) related options. The format of this value is a line with 10 digits and is represented as 2 numbers of 5 digits.

Personal notes

Teletext Options Menu

eurav3 no, normal ext3scart = off, on eurav4 yes, no ext4scart = on, off tda_9143 yes, no tda9143 = on, off teletext yes, no teletext = on, off

as_pdc_vps yes, no ats = on, off as_txt_preset_ta

ble

yes, no aci = on, off

Page 18

18 4. Service modes FTV1.9EE Receiver Box

4.7 Protections

The only GFL based protection that has been taken over in FTV1.9 is the "remote low voltage short circuit detection", which is SW based. Error 44 and 45 lead to protection (blinking STNDBY LED) but can be overruled via the service pins on the SSP. Several HW protections are deleted in FTV1.9 because some functions have been deleted (or transferred to the Monitor). The following I2C addresses need to be polled for FTV1.9 Europe:

IC - (Panel) IC description Error-code

SAA5270 (Teletext -AQ) IVT3 - Teletext 28 S87c654 (FBX 4 - F) FBX4 uP 29 FQ916ME (IF (SSP) - S) IF on SSP 6 UV1216E (DW) Double window 34 TEA6430 (Euro I/O - I) Audio switch

Euro I/O

10/11

Personal notes

Page 19

FTV1.9EE Receiver Box 4. Service modes 19

4.8 Electrical Alignments

Adjustments on the DW panel

VCO alignment (L9H0)

• Connect a signal generator (e.g. PM5326) to the tuner of the set.

• Select a 475.25 MHz colour bar without sound.

• Set the subchannel frequency 475.25 MHz in the DW mode.

• Connect an oscilloscope to TP15 and adjust L9H0 for a DC level of 2.5 V +/- 0.1 V.

AGC take over point adjustment (R9G5)

Introduction

The AGC adjustment prevents overdriving of the PIP-tuner if the aerial signal is too strong. Overdriving is visible as a loss of colour and synchronisation in the PIP picture. Amplification has to be adjusted to minimum level, but the PIP-picture should be as free of noise as possible.

Adjustment

• Connect a signal generator to (e.g. PM5326) to the tuner of the set.

• Select a 475.25 MHz colour bar without sound.

• Set the subchannel frequency 475.25 MHz in the DW mode.

• Connect an oscilloscope to TP14 and adjust R9G5 for a DC level of 3.5 V +/- 0.1 V.

Personal notes

Page 20

20 4. Service modes FTV1.9EE Receiver Box

4.8 Electrical Alignments

1 Offset = 4.5uA 1 Offset = 0uA

Phase alignment (R9G6)

• Connect a signal generator to (e.g. PM5326) to the tuner of the set.

• Select a 475.25 MHz window signal (centre white) without sound.

• Set the subchannel frequency 475.25 MHz in the DW mode.

• Connect an oscilloscope to TP20 and adjust R9G6 that the

shape of horizontal white black jump becomes as figure above

CL 66532066_001.ai

Set TDA9143/44 in PAL plus mode ( HW option code nr 3 - bit 7 ) Measure Y-MAC on pin 2 of connector S62 or pin 2 of connector S49 and align R3361 [S5] until the amplitude =

1.1Vblack-white5%

221096

M-trap alignment (L9G0)

• Connect a signal generator to (e.g. PM5326) to the tuner of the set.

• Select a 475.25 MHz colour bar with 4.5MHz sound carrier.

• Set the subchannel frequency 475.25 MHz in the DW mode.

• Connect an oscilloscope to TP20 and adjust L9G0 to

minimum amplitude of 4.5 MHz sine wave on the sync-chip.

CVBS level adjustment on the Small Signal Panel

For this alignment it is necessary that the comb filter (module), DW module and feature box are in the SSP. For sets without PAL plus feature. Input signal : Antenna test signal PAL 75% colourbar Measure Y-FEAT on pin 1 of connector S48 and align R3361 [S5] until the amplitude = 1.0Vblack-white 5%. For sets with PAL plus. Input signal : Antenna test signal PAL 75% colourbar

Page 21

FTV1.9EE Receiver Box 4. Service modes 21

4.9 Software Alignments

See chapter "Service Alignment Mode (SAM)".

Personal notes

Page 22

22 5. Audio FTV1.9EE Receiver Box

5.1 Audio Signal Flow

5. Audio5.1Audio Signal Flow

FRONT

END

AUD1-TERR

AUD2-TERR

SIF-TERR

CINCH FRONT

CINCH VGA

CINCH DOLBY

CENTRE INPUT

DECODER

Scart 1

Scart 2

Scart 3

INPUT

FRONT I/O PANEL

INPUT

A/V BUFFER PANEL

SIGNAL FLOW

SCART

OUTPUT

7/26 13/20

MAIN IN

3/5

AUX IN

28/30

SCART IN

1/32

I-STEREO

PROCESSING

INCREDIBLE STEREO PANEL

HEADPHONE

OUTPUT

VOLUME SPATIAL

TREBLE BALANCE CONTROL

10/239/24

AUDIO

CONTROL

BASS

ON/OFF

LOUDSPEAKER

15/18

OUTPUT

FRONT I/O PANEL

HEADPHONE

OUTPUT

CINCH CL/VL

OUTPUT

I/O PANEL

A/V BUFFER PANEL

CINCH VGA

OUTPUT

CL 96532069_040.eps

240899

PRC_IN

NC NC

I/O PANEL

ECO NICAM PANEL

ECO NICAM

DECODER

L/R-TERR

L-2CS

2CS

R-2CS

The selection Front_audio and the VGA_audio will first be done at the A/V buffer. This output signal will go to the audio matrix at the I/O board for the selection with the SCART inputs. The Audio path can be divided in several building blocks:

• Front-end (S1)

• Terrestrial sound Decoding

• Source Selection

• Audio Processing (for loudspeakers headphones and CL)

• Loudspeaker Filtering and Power Amplifiers (for

loudspeakers and headphones). The Loudspeaker filtering and Power Amplifiers are transferred from the E-Box to the Monitor, so they are not described in this document. The following part will describe the functions realised in each building block in the E-Box.

Front-end (S1)

The front-end demodulates the sound information from the terrestrial TV signal (VHF, UHF, S- and H-channels). Two different tuners will be used in the FTV 1.9 project.

• The FQ916DME which is suitable for systems B/G, L and M.

(/12 - Western Europe)

• The FQ916DMF which is suitable for B/G, L/L' and I. (/19 -

France/UK) FM demodulated audio signals (B/G, I and M) are available at the AUD1_TERR and AUD2_TERR; AM demodulated audio signals (L/L') are available at AUD1_TERR.

NICAM can not be demodulated/decoded in the front end, and must be realised by a separate NICAM demodulator/decoder. Therefore the SIF_TERR signal is made available which contains all sound subcarriers (amongst which the NICAM subcarrier of 5.85 MHz or 6.552 MHz depending on the system).

2CS decoder (S2)

The 2CS decoding is in fact de-matrixing of the two FMdemodulated carriers and pilot tone detection. The pilot tone detection is needed to indicate if a transmission is mono, stereo or bi-lingual. The status of the detection can be read out via I2C. The software then knows how the de-matrixing must be set, and must control that via I2C. For a bi-lingual transmission the language can be selected via I2C in the stereo decoder. The 2CS decoder IC has a source selector that selects between the de-matrixed mono/stereo/ dual signal and the AMdemodulated mono signal (system L/L' for France).

NICAM sound decoder (G)

The NICAM demodulation consists of QPSK demodulation and delivers a bit stream signal to the NICAM decoding. The NICAM decoding interprets the bit stream and generates either mono, dual language or stereo depending on the transmission. The kind of transmission (mono, dual or stereo) can be read from the SAA7283 via I2C. The software can select the desired mode (E.g. language 1 or 2) via I2C.

Page 23

FTV1.9EE Receiver Box 5. Audio 23

5.1 Audio Signal Flow

The IC also has a register that contains the maximum allowed Bit Error Rate (BER) of the digital sound reception. The main SW has to write this max BER into this register. If the measured BER becomes higher than max BER then the IC will switch automatically to analogue sound to prevent crackling sound. The SAA7283 contains a source selector that is used for selection between analogue sound (FM mono/stereo or AM mono) and digital (NICAM) sound. The NICAM signal can be muted via I2C. During channel switching also the TDA9840 is muted.

Euro I/O (I)

The Eco Euro I/O panel realises the source selection of the SCART2 output, the loudspeaker and the headphone channels. Only stereo pairs can be selected, so no language selection can be done here. All switches can select between 5 stereo inputs, have a separate gain control, a separate mute position, and a tri-state option. A switch can be set in a certain position by writing a byte to the address of the TEA6430 on the Eco Euro I/O panel.

Personal notes

Page 24

24 5. Audio FTV1.9EE Receiver Box

Dolby Receiver

VCR/DVD MONITOR

SCART

L/R AUDIO L/R CENTRE

E-BOX

SCART 1

SCART 2

SCART 3

CL/VL

OUT

DOLBY

RECEIVER

CENTRE

INPUT

CENTREL/R AUDIO

L-SURROUND

L-FRONT

R-FRONT

R-SURROUND

CL 96532069_006.eps

040899

Page 25

FTV1.9EE Receiver Box 5. Audio 25

5.1 Audio Signal Flow

Connecting a Dolby Receiver:

The connection of the Dolby receiver

In the E-Box, no Dolby processing is done. However a Dolby processor can be connected to the E-Box. Via a menu item, the E-Box can be switched in a special Dolby mode, where the CL/ VL output will be a fixed value (CL out) of 0.5Vrms and the Dolby input of the AV Buffer will be selected. The External Dolby source must always be connected via SCART or front Y/C or CVBS with L+R audio. The Dolby audio signals will pass the source selectors for the headphone and CL output. At the AV buffer, the single Dolby centre signal will be split up in the L and R audio signal for the Monitor (so the sound will be audible via the left and right speaker). The set speakers in the Monitor will be the centre speakers. The headphone processing consists of volume, balance and mute.

Personal notes

Page 26

26 5. Audio FTV1.9EE Receiver Box

5.2 Audio processing

AUDIO PROCESSING

IF-NICAM

IC7600

TDA9840

Aud1-terr

M, I, L+R

Aud2-terr II, 2R

S26

From Front-end

S26

7 9

2CS decoder

I2C

S27

M,I,II,L

M,I,II,R

S27

L-2CS

R-2CS

L-terr

R-terr

I/O

Panel

240899

Nicam

jumper if no NICAM

CL 96532069_029.eps

2CS SOUND PATH

The purpose of the 2 carrier sound decoders is to convert the audio signals from the FM demodulators in the front-end into mono, stereo or dual sound audio signals. In case a NICAM module is present also the NICAM digital sound can be selected. This selection takes place on the NICAM module. The 2CS decoder is built up around the TDA9840 IC and comprises:

• The stereo matrix.

• The de-emphasis.

• The output switch for mono, stereo, dual A/B and AM

sound.

• The output-mute.

• The mono, stereo, and dual identification.

Personal notes

Page 27

FTV1.9EE Receiver Box 5. Audio 27

5.2 Audio processing

The used IC is a SAA7283, which contains the NICAM demodulation/decoding, and also the QPSK demodulator so that the whole circuit is build around the IC7501. The IC7501 contents:

• FM and vision filters, analogue demodulator and switching

• Dual standard with automatically system selection

• Stereo Bitstream audio DAC´s

• Programmable attenuator for matching levels of NICAM

and FM audio sources

•µP controlled via I2C -bus

NICAM sound path

Signal-processing:

• The SIF-signal originating from the front-end is sent to the pins 28 and 29 of the SAA7283

• After amplification the signal is offered to the internal QPSK demodulator; the signal will then demodulated and converted back to a bit stream of 728K.

• The NICAM decoder-part of the IC decodes the signal. A digital filter provides error correction and increases the sample frequency by a factor of three. The two DAC's integrated into the SAA7282 convert the signal into an analogue signal. Finally, a switch in the SAA7282 selects between NICAM signals or analogue signals.

• The kind of NICAM-transmission (mono, dual, stereo) and also the allowed Bit Error Rate (BER) can be read out via I2C -bus; by using this information a decision whether

CL 96532069_041.eps

130799

NICAM or analogue sound is audible can be determined by the µP.

• The signal from the 2CS-decoder IC7600 (TDA9840) is fed to the pins 3 and 12 of the SAA7283.

• The selected output signal (pin 4 and pin 11) is delivered to an amplifier-stage, build up with a LM833.

• Finally the signal is then offered to the source select I/Opanel.

Page 28

28 5. Audio FTV1.9EE Receiver Box

5.3 Audio Control

AUDIO CONTROL

Incr. Sound

IC7650

TDA 9860

From

I/O select

main

hp-ss

3 5

28 30

cst.

var.

audio control

audio feature unit

tone

cst./var.level

headph.

General

All necessary adjustments such as volume, tone, stereo, mono, spatial, mute, etc. are performed in the control IC TDA9860. An internal switch can pass the sound through the incredible sound panel. This signal is sent to the audio output amplifiers. The "headphones" sound that has a separate selection switch on the I/O panel travels via volume and balance controls to the headphone amplifier. The audio output on the I/O panel can be switched between a constant and variable level. All switching and adjustment are performed via I2C-Bus.

7 26

13 20

Personal notes

prc15

cl/vl

audio power

ampl.

I/O panel

var./const level out

head.amp.

hp-out

CL 96532069_030.eps

240899

Page 29

FTV1.9EE Receiver Box 5. Audio 29

5.3 Audio Control

AUDIO CONTROL IC

headph.ampl

R-HP-out

1320

soundprocessing

bass

27 29 22

2652

2654

15n15n

2656

33n

2658

IC 7650

To audio ampl.

R-PRC

treble

14 19

2660

5.6n

2662

L-PRC

From

I/O panel

L-HP-SS

R-HP-SS

L-MAIN

R-MAIN

TDA 9860

input

select

o o

const./var.level output

I/O panel

L-HP-out

726

2491023

Block diagram control IC - TDA9860

The audio control IC7650 (TDA9860) on the SSP has 3 stereo or 6 mono inputs and 6 outputs. Each input can be switched to an output.

The loudspeaker channel

The audio from the I/O-panel is fed to the input pin 3 and pin 5. Following volume adjustment the selection for stereo, spatial with two positions and mono with or without pseudo stereo effect is made. The tone adjustment consists of a bass adjustment (C2656 and C2658) and a treble adjustment (C2660 and C2662). The loudness adjustment is a volume dependent tone adjustment that operates on signals smaller than 10 dB. Balance adjustment follows the tone adjustment. On mute the volume is switched to minimum. The output pin 18 and pin 15 respectively carry the left and right audio signals that are sent to the amplifier.

The constant/variable level output

A connecting plug is located on the I/O panel with which the set can be connected to an audio installation. This plug is connected to the outputs pin 7 and pin 26 that can be switched to the constant level signal from pin 3 and pin 5, or the adjusted signal for the output amplifier that is fed back to the inputs pin 1 and pin 32.

CL 96532069_031.eps

240899

Headphone output

The headphone adjustments are performed on the I/O panel. The audio signal incoming from the I/O-panel is delivered to pin 28 and pin 30 on the control IC. Following volume and balance adjustment the signal travels to the headphone amplifier via outputs pin 20 and pin 13.

Page 30

30 5. Audio FTV1.9EE Receiver Box

5.4 Incredible Stereo (AY-panel)

INCREDIBLE STEREO (AY-panel)

PHASE

SHIFT

PHASE

SHIFT

The principle of the incredible sound processing is based on the fact that the human mind mainly uses two elements for localising a sound source. When a sound comes from the left, it will enter both ears but:

• The phase of the sound will be slightly different for both ears because of the distance between the ears.

• The sound level will also be slightly different, also because of the distance between the ears.

The incredible sound circuit electronically generates a phase and sound level relation between the left and right signal, in such a way that to the human mind it sound as if the sound is actually coming from the far left or right side. The circuit itself therefore consists of two phase shift circuits and two adder circuits. In this way a bit of the right signal is added to the left signal and visa versa. The adding is done with a carefully selected phase shift and amplitude relation. The source-audio-signal incoming from the IC7650 (TDA9860) Pin 9 and 24 is delivered to the incredible surround panel. For the incredible sound function two LM833T (IC7600/IC7601) are used; one part of the IC´s are used for the phase shifting, the second part is used for amplification. The signal is then fed to IC7602, which works as a switching-IC between the original audio-signal and the "incredible sound"signal. The selected signal is then routed back to the TDA9860 pin 10 and 23 for further processing.

CL 96532069_007.eps

040899

Personal notes

Page 31

FTV1.9EE Receiver Box 6. Video 31

6.1 Introduction

6. Video6.1Introduction

For the block diagram see Service Manual Receiver Box chapter 6.

• The FRONT-END transmits a video signal to the InputOutput panel. The LF audio signals originating from the 5.5 and 5.7 MHz carriers are processed into stereo or dual signals in the 2CS (2 Carrier Sound decoder).

• The Nicam signal is transmitted to the Nicam decoder as an IF signal. The Nicam decoder processes the signal into stereo or dual signals and also provides the switching between Nicam and non-Nicam signals. The switched LF signals are sent to the Input-Output panel.

• The INPUT-OUTPUT PANEL accommodates 3 scart plugs and an audio output with cinch plugs. The front signal and the SVHS input are transmitted to the Input-Output panel. The signal selection is located on the panel itself and includes the audio switch, the video switch that switches CVBS or SVHS, the RGB switch and finally the record selection that transmits the signal selected to SCART 2. The panel has its own microprocessor that communicates with the main processor via IC.

• In sets without Dolby Pro Logic the audio controls are performed on the SSP panel. The outputs of the audio controller supplies the headphones amplifier, the audio output and the L and R output amplifier.

• The selected source for the video signal is transmitted to the COMB FILTER that offers separate Y and Chroma to the chroma decoder. The comb filter is deactivated for SVHS and SECAM signals. The chroma demodulator processes the signal into U and V signals, and transmits them together with the Y signal to the Feature Box. The chroma demodulator also accommodates the sync. section, the sync. pulses are also transmitted to the Feature Box.

• The Double-Window module contains a second tuner and is in that case supplied with antenna signals. The DW module can also work with CVBS or SVHS signals. In the Double Window module a sub-picture can be inserted via a fast video-switch IC. The output of the DW module is fed to the feature box.

• The Feature Box receives 50 Hz signals and converts them into 100 Hz signals. In the feature box digital scan,natural motion and AI is applied. Other features can be switched on as required.

• The 100 Hz signals are matrixed into RGB signals in the video controller (TDA4780). Video adjustments are then performed via IC. TXT or OSD signals are selected by the video control IC.

• The audio amplifier and the supply for the Monitor have been moved from the E-Box to the Monitor while the Dolby processing has been deleted. The small signal electronics is "taken over from/based on" the GFL-Feature Lift (GFLFL) because this is a very versatile (global) High End chassis .

Personal notes

Page 32

32 6. Video FTV1.9EE Receiver Box

6.2 Tuner / Front-end

FRONT - ENDS

FQ916ME Mk2

23 22

AF1/AM

AF2

240899

CVBS

Nicam

5.85

33V

FQ916MF Mk2 FQ916DME Mk2 FQ916DMF Mk2 FQ916MR Mk2

HF IF

mixer

Vtun.

PPL

ref.

osc.

13 14

osc.

band

34.4Mc saw BG

afc

I2C

BG/L

4.5/5.5/5.74/6.5

video

demod.

PLL

77.8

afc

sound

demod.

32.4

4.5

5.5

5.74

TDA9815

ooo

CL 96532069_010.eps

The front-ends used consist of:

• A tuner

• An IF circuit

• A detection circuit.

The tuner is suitable for the reception of VHF1, VHF3, UHF, Schannels and hyperband. The output supplies the CVBS picture and a mono or stereo audio signal. The following types are used within the FTV 1.9:

• FQ 916 DME/PH MK2 BG/L/M.

• FQ 916 DMF/PH MK2 BG/L/L'/I.

The following abbreviations are used in the names: PH = PHono antenna connection. D = Version with splitter. MK2 = improved model in the 900 series with a wider bandpass range in the tuner and better stabilisation.

Personal notes

Page 33

FTV1.9EE Receiver Box 6. Video 33

6.2 Tuner / Front-end

TUNER PART

FQ916

HF IF

mixer

osc.

33V

Vtun.

PPL

ref.

osc.

13 14

FRONT-END

The tuner section contains the tuning stage and a combined oscillator-mixer. The tuner is IC controlled. The full tuning range is divided into a low, mid and high band. Tuning is achieved by sending a frequency (divider) to the PLL in the tuner. This adjusts the varicap voltage of the local oscillator until the correct frequency is reached. By comparing the frequency of the local oscillator in the PLL with the frequency of a reference oscillator the frequency set via IC will always remain constant. When tuning the operation control software adjusts the frequency to the correct AFC adjustment via the IC bus. The frequency is stored in memory. For VCR presets the AFC information is read out continuously and the tuning adjusted if necessary. The tuning voltage varies with the frequency selected.

band

Video

Audio

I2C

afc

CL 96532069_011.eps

Personal notes

240899

Page 34

34 6. Video FTV1.9EE Receiver Box

6.2 Tuner / Front-end

IF-PART

FQ916

34.4Mc saw BG

afc

I2C

BG/L

4.5/5.5/5.74/6.5

afc

IF and Detection

THE EUROPEAN MULTI, BG / L / M

In the 34.4 MHz filter the sound carrier for the M-norm is suppressed so that it falls within the video bandwidth. Picture detection is performed in the TDA9815 after the 38.9 MHz SAW filter. In this case the reference frequency is not derived from the picture carrier, but from a PLL oscillator on the double frequency (this is 77.8 MHz). This is "locked" to the picture carrier. The demodulator output supplies CVBS. For the L-norm the positive video is inverted. External filters suppress the sound carriers in each norm. The sound carriers are filtered out of the IF. Following synchronisation demodulation the FM sound carriers are set at

5.5 and 5.74 MHz. The 4.5 MHz is derived from the video detection. A filter splits the different sound carriers from one another. Following FM or AM detection the AF1/AM output supplies the LF sound L + R, language I or mono. Output AF2 supplies the 2xR LF sound or the 2nd language. On mono or AM sound output AF2 is suppressed automatically. On incorrect tuning the PLL will be readjusted to the wrong picture frequency. The PLL tuning is communicated via the I2C bus as an AFC voltage. The tuning can then be readjusted by the software.

video

demod.

PLL

77.8

sound

demod.

CVBS

o ooo

23 22

240899

32.4

4.5

5.5

5.74

TDA9815

CL 96532069_012.eps

Nicam

5.85

AF1/AM

AF2

THE FRENCH MULTI BG / L / L' / I

Operation is the same as the European multi for the BG and Lnorm. The L'-norm provides several changes. A 40.4 MHz filter suppresses the sound carrier of L'. The SAW filter has an extra flank on 33.95 MHz, the sound carrier on L'. The VCO of the PLL can be switched to 67.9 MHz, the double frequency of the sound carrier on L'. The various filters are also different in comparison to the European multi.

Page 35

FTV1.9EE Receiver Box 6. Video 35

6.3 I/O panel

I/O MICROPROCESSOR

INTERRUPT

IC7814

EXT 1

STATUS

EXT 2

STATUS

7817

LEVEL

LLVLL

TMP J7C2C3

28 22

16:9 STATUS EXT 1

4:3

16:9

4:3

RGB EXT 2

RGB EXT 1/EXT2 Kill

RGB EXT 3 Kill

EXT 3

STATUS

FBL Ext 1

RONI

OSDECT

RATIA

7816

LLVLL

16:9

4:3

PCR SDA SCL

For this purpose the ECO-I/O-Panel from the GFL-chassis is used. It contains three scart-connectors and one front-input wich can handle CVBS orY/C-signals. A separate I/O- microprocessor, located on the I/O-PCB, controls the input and output signals. A cinch output delivers a audio-signal with variable or fixed output.

Microprocessor

An extra microprocessor is present on the Input-Output panel that steers all the control signals on the panel. The microprocessor is supplied with a 5V power supply (stand-by power supply) and receives a reset pulse from the POR which is inverted by TS7800. The other pins are input or output pins. The status signals for the three scarts have 3 levels: no status, 16/9 status and 4/3 status. For this reason they are first converted into 6 signals in a comparator circuit (1 or 0). Outputs are the RGB selection signal for scart 2 and RGB kill for scarts 1 and 2 combined and for scart 3. Also the status output pin for scart 1 is an output. Communication with the main processor is performed via IC, a control signal IRQ-SS (Interrupt ReQuest Source Select) warns the microprocessor if any change has occurred. The main processor controls the various switching IC's via IC. The IRQ-SS provides status changes to the control processor. When one of the statuses becomes active it is processed by IC7814, which reports it to the central processor via the

3131214

interrupt line. The central processor halts its program and requests the information via the IC bus. Depending on the nature of the information the central processor will then signal the switching IC's or the local processor IC7814. The local processor does communicate via the IC bus but therefore a 3rd line (strobe) to the main processor is required. This uses the same pin as the interrupt, namely pin 22.

Reset

When the reset pin (pin 3) is held low while the power supply voltage is present the microprocessor program will restart. Furthermore the I/O microprocessor performs a self-test, the result of which is made available via pin 21. If this is low the selftest was successful.

I/D

CL 96532069_037.eps

011099

Page 36

36 6. Video FTV1.9EE Receiver Box

6.3 I/O panel

EURO I/O VIDEO PATH

Video path Eco-I/O

Input signals:

• +++++++++++++++++CVBS Tuner

• CVBS/RGB Euroconnector 1

• CVBS/Y-C/RGB Euroconnector 2

• CVBS Euroconnector 3

• Y/CVBS Front input

• C Front input

Output signals:

• EXT 1 --> CVBS terrestrial output

• EXT 2 --> CVBS or Y/C output C main picture / WYSIWYR

• EXT 3 --> only input

CL 96532069_013.eps

Personal notes

240899

Page 37

FTV1.9EE Receiver Box 6. Video 37

6.3 I/O panel

EURO I/O AUDIO PATH

+8V6 +8V-AUD

6851

1LL4148

4E7

OUT

3800

2800

47uF

L-IN-SC1

L-IN-SC2

L-FRNT

L-IN-SC3

L-TERR

L-MAIN

R-MAIN

L-OUT-SC1

R-OUT-SC1

2887

220n

2806

10uF

REF

2804

10uF

2805

10uF

47uF

2802

10uF

2810

10uF

2817

223

5 6 7 8

10 11 12

TEA6430

GND REF VCC L1-I L2-I L3-I L4-I L5-I LI-O R1-O

L2-O

R2-O

7822

SDA

SCL SUB R1-I R2-I

R3-I R4-I R5-I R4-O L4-O R3-O L3-O

223 21 20 19 18 17 16 15 14 13

3872

100

3871

2813

10uF

2808

10uF

2812

10uF

2814

10uF

2811

10uF

SDA-S

SCL-S

R-IN-SC1

R-IN-SC2

R-FRNT

R-IN-SC3

R-TERR

R-HP-SS

L-HP-SS

CL 96532069_014.eps

OUT

040899

Audio path Eco-I/O

One switching IC is applied on the ECO I/O Input signals:

• L/R Front-end

• L/R Front input

• L/R Euroconnector 1

• L/R Euroconnector 2

• L/R Euroconnector 3

Output signals:

• L/R Loudspeakers

• L/R Headphones

• L/R Euroconnector 2 out

DUAL An extra feature of the EURO-I/O panel is that a choice can be made between language I and II for both loudspeakers and headphones because the front-end sound is supplied to 2 inputs.

Personal notes

Page 38

38 6. Video FTV1.9EE Receiver Box

6.3 I/O panel

EURO I/O RGB PATH

RGB path Eco-I/O

In sets with an ECO-I/O there is only one RGB input which is selected by IC7815 whether RGB originates from SC1 or SC2. This RGB signal is fed directly to the TDA9144 bacause no PIPmodule is present; the chroma-IC converts the RGB into YUVsignals. This YUV signal is carried via the feature box to the video controller.

Personal notes

CL 96532069_035.eps

240899

Page 39

FTV1.9EE Receiver Box 6. Video 39

6.4 Video-signal processing

BLOCK DIAGRAM VIDEO

Video Processor

Decoder + Sync

Video Dem.

YUV

RGB

Sync

SC-1FH

RGBscart

Main Y/CVBS

C/CVBS

Comb.filter Feature Box Video Control

Combf. PAL NTSC

Just before the video processing, the CVBS is adjusted to stop the amplitude spread in the circuits before the video processing. This is necessary for the optimum performance of the circuits that follow. In the video processing the CVBS originating from the I/O panel in PAL and NTSC are switched through to the comb filter where Y and chroma are separated. In SECAM the required chroma and luminance filters are located in the chrominance decoder. An SVHS signal with separate Y and chroma is switched directly to the decoder. In the decoder Y and chroma are converted to Y, U and V. The synchronisation provides a 50 Hz horizontal, vertical and sandcastle pulse. Y, U and V are doubled within the FBX-4 to a line frequency of 32kHz. The frame frequency remains 50Hz. The PDP can can not handle frequency above 72Hz. In the video control circuits Y, U and V are converted to RGB. With a switch, TXT or OSD can be switched on. The switched RGB signals undergo the following adjustments: brightness, contrast, saturation and black-stretch. The 100 Hz picture is carried to the video control.

YUV

50Hz

AI print PALplus

PIP

50Hz

YUV

RGB

TXT-kill

PIP TXT-OSD

Personal notes

Control

CL 96532069_015.eps

011099

PTP

R G B

Page 40

40 6. Video FTV1.9EE Receiver Box

6.5 Comb filter circuit

COMB FILTER

7352

FSUB/COMB ON-OFF

VIDEO PROCESSOR TDA 9141

Y/CVBS-COMB

C/CVBS-COMB

V10a

(Y/CVBS_COMB)

0.2V / div AC 10µs / div

V10b (C/CVBS_COMB)

0.2V / div DC 10µs / div

(FSUB_COMB ON/OFF)

V12

0.1V / div AC

0.5µs / div

CL 96532069_038.eps

240899

Y/CVBSMAIN

C/CVBSMAIN

3422

2406

2407

FSCSW

TMSEL

TP2

786

VCC

VCCO

/CVBS

EXT

DGND

OGND

21 11 9 26

4234

4233

2423

2405

2404

2403

19 24 5 25 3 1

CSY

SSYN

AGND

REFDL

REFBP

COMB FILTER

SAA4961

PLLGND

SYS2

SYS1

23 20 18 27 22

COMBENA

LPFION

3421 4.43MHz

BYP

FSC

OUT

VCCPLL

VDD

5402

2417 2402

5401

2416

2401

V12

V10a

V10b

The comb filter IC is located between the I/O-panel and the video-processing IC TDA9144. It can work in two different conditions:

• Comb filter mode

• By-pass mode

The voltages at pin 20 and 23 of the SAA4961 (SYS1 and SYS2) determine the current mode PAL + NTSC-input signal: --> comb filter "on" --> Pin 14 delivers the Y-out signal --> Pin 12 delivers the C-out signal SECAM + SVHS-input signal: --> comb filter "off" The system pins are connected to the I/O-controller HEF 4094 (IC7204) which is controlled by the µP.

Personal notes

Page 41

FTV1.9EE Receiver Box 6. Video 41

6.6 Video processor (IC7352)

VIDEOPROCESSING

chr.

y/cvbs

clock combf.

7352

chroma

switch

del.

60n

sync

sch.

hor.

PLL

3354

24k

2368 470n

filt.

vert.

sync

sc-1Fh

2370 2n7

Pal-NTSC

timing

gen.

clamp

sec.

cl.

filt.

o o

Secam

Dem.

Pal

NTSC

Dem.

hue

chr. PLL

30 31

4.43 3.58

15p 15p

sys.id.

syst.

switch

3376

2392 100n

YUV

75k

TDA9144

-(r-y)

-(b-y)

outp.

switch

RGB

clamping

TDA46657358

2393

100n

2394

100n

sc-1Fh

4 13

14 12

18 21 20 19

2391 2n2

V U Y

F-Bl. R G B

-dec

64u

PLL

to FBX

from PIP

CL 96532069_016.eps

100n

2396

100n

2395

240899

The TDA9144 is an IC controlled PAL-SECAM-NTSC decoder with a built-in sync processor. The number of peripheral components is very limited and there are no adjustments.

The luminance path

The luminance signal from pin 26 is delivered via the delay line to the Y filter. This filter is switched automatically depending on the colour system. When the comb filter or the external SECAM notch filter is switched on the filter in the IC is switched off. The Y signal travels directly to the output switch.

The chroma switch

The chroma switch connects the CVBS or the chrominance signal to the demodulator. This switch is placed in the required position by IC. In the automatic mode the signal with the largest burst is switched through. A picture originating from the frontend comb filter therefore provides a separated chroma. On poor reception the comb filter does not work and the CVBS is used.

The colour demodulator

After the chroma switch the signal, depending on the colour system, travels either to the chroma bypass or the SECAM clock filter. When the comb filter is operative, the filters in the IC are switched off. The PAL/SECAM or NTSC demodulator

provides the -(R-Y) and -(B-Y) signals that are switched via the system switch to outputs pin 1 and pin 2.

The chroma delay IC ( IC7358)

The operation of the delay IC is the same for the different colour systems; the purpose however is dependent on the system. In the PAL system phase errors are removed. On SECAM, whereby both the -(R-Y) and the -(B-Y) output of the demodulator only contain colour every other line, the missing line is filled in by the previous delayed line.

RGB matrix and output switch

The U and V signals from the delay line are delivered together with the internal Y signal to the output switch. A selection can be made here between the signals originating from the demodulator and RGB from the I/O-panel. The switch is normally positioned via IC. Switching can also be made dependent on the voltage on pin 18 of the IC, control then occurs through the RGB fast blanking. The RGB signals are converted in the matrix into Y, U and V and are present at pin 12, 13 and 14 of IC7352.

Identification and PLL

The crystals used determine the recognisable colour systems. The 4.43 MHz ( pin 30 ) and 3.579 MHz crystals ( pin 31 ) used make the decoder suitable for PAL and NTSC on both

Page 42

42 6. Video FTV1.9EE Receiver Box

6.6 Video processor (IC7352)

frequencies. For NTSC the reference oscillator phase is regulated in the HUE adjustment. The 4.43 or 3.579 MHz reference frequency that is used as the clock frequency for the comb filter is located on pin 23. This is superimposed on a DC voltage that switches on the comb filter. The DC voltage can be switched on or off via IC, which in turn switches the comb filter on or off.

Personal notes

Page 43

FTV1.9EE Receiver Box 6. Video 43

6.7 Video control

LUMINANCE TRANSIENT PROCESSING

sandcastle

Delay

Luminance transient processing:

Introduction

In the FTV 1.9E the LTP IC7580 - TDA9177 has been added in front of the video control IC7500 - TDA4780. This IC is I2C controlled and carries out some corrections to the Y signal. These are:

• smart peaking

• step improvement

• noise suppression

I²C

7580

Smart peaking Step improvement Noise reduction

TDA9177

Personal notes

7500

VIDEO CONTROLFBX

TDA4780

CL 96532069_025.eps

240899

The input signals

The input signals are formed by YUV on pins 5, 9, 7 and a sandcastle on pin 1. The output signals are YUV on pins 20, 16 and 18. The U and V signals are delayed according to the corrections to the Y signal.

Smart peaking

Smart peaking is a circuit that only applies peaking to small signal changes; because of this, details in the picture can be seen more clearly. The extent of peaking and the signal amplitude to which smart peaking operates, can be adjusted via I2C. With large signal amplitudes (e.g. with black-white transitions) there will be less peaking to avoid unwanted shadow effects. When the LTP is used, the software peaking of the Feature Box will be turned off but the hardware amplification continues to operate.

Page 44

44 6. Video FTV1.9EE Receiver Box

6.7 Video control

LUMINANCE TRANSIENT PROCESSOR

White

Black

White

Black

Max. step improvement / nom. line width Max. step improvement / min. line width

Step improvement

This provision ensures that black-white transitions are made even steeper. The result of this is that the picture gives a still sharper impression.

White

Black

PeakingNo Peaking

White

Black

CL 96532069_026.eps

Personal notes

240899

Noise suppression

The LIMERIC in the Feature Box determines the noise level in the picture and appraises this by means of the noise figure, which is passed on via I2C to the microprocessor. On the basis of the noise figure, in addition to the degree of noise suppression in the LIMERIC and the degree of DNR, the degree of peaking together with the "steepness" and the "coring" in the LTP is now also reduced in proportion with the rise in the noise figure. Because of this, even better noise suppression can be arranged.

Page 45

FTV1.9EE Receiver Box 6. Video 45

6.8 Video selection & control (IC7500)

6.8 Video selection & control (IC 7500)

SELECTION & CONTROL

stab.

19 17

2536 2542 330n 100n

c-off

off

cut-

TDA4780

to VCI

21 23 25

2540 2538 100n 100n

CL 96532069_027.eps

240899

Y to scavem

TDA4780

Blue

stretch

adj.

ampl.

white

ampl.

white

ampl.

white

peakwhite

limit I2C

2544

measuring

1uF

IC7500

YUV

U86

FBX

PIP

F-Bl.

TXT

F-Bl.

txt

kill

from PIP

RGB

ooo

timing

sandc.

6550

7518

F-Bl. PIP

scavem

off

6551

matrix

+DC

DC=adj.VCI

r-y

b-y

g-y

adapt.

black

3548

220E

3551

gamma

2546

1uF

7550

3550

100E

3549 1k

The main functions of the video control IC TDA 4780 are:

• Switching to TXT or OSD.

• Adjustment of: – Brightness. – Contrast. – Saturation.

Switchover and picture controls

The Y, U and V from the Feature box are converted to R, G and B. This matrix is switched over depending on the colour system, so that an optimal result is always obtained. With the first RGB switch the PIP picture can be switched on but this function is not used in FTV1.9. Via the following RGB switch TXT or OSD can be switched through. A number of adjustments are only made on the Y signal so that Y and three colour difference signals are made from the RGB in the following matrix. The direct current (DC) on pin 26 can be adjusted separately. This is used as the soft-clipper adjustment. In the adaptive black adjustment (black-stretch), the darkest Yvalue is measured and brought back to black. Because the total amplitude becomes 15% smaller the contrast is increased (via the software) by a factor of 1.2 when the black-stretch is switched on. The gamma adjustment gives the linear amplification characteristic a bent shape. A higher gamma adjustment gives an even more bent characteristic, through which the darkest passages are given more contrast. This adjustment is coupled

to the brightness adjustment, so that different brightness adjustments nevertheless result in optimum contrast being obtained. Following colour saturation adjustment the signals are once more converted to R, G and B, following which the contrast and brightness is adjusted.

Page 46

46 7. Control FTV1.9EE Receiver Box

7.1 Control system

7. Control7.1Control system

CONTROL SYSTEM

7202

7200

ROM

data

512k

CPU

adres

20 bits8 bits

adres

2 3

5 14

outputs

56 12

7206

strobe

inputs interupts

adres

SDA SCL

I2C-3

data WR

RAM

32k

I2C-F 400kc

SDA SCL

I/O EXP

outputs

7204

SDA SCL

321

I/O EXP

7213

I2C-S 100kc

15153

outputs

uP & control

627 5

NVM

16k

7212

CL 96532069_032.eps

240899

The purpose of the control circuits is:

• The control of the various IC's and modules via serial busses.

• Control of circuits without IC communication via direct output ports.

• LED control.

The input originates from:

• RC5 operation.

• Local keyboards.

• IC and module status signals via IC.

• Direct input from certain circuits.

• Interrupt lines such stand-by, TXT...

Personal notes

Page 47

FTV1.9EE Receiver Box 7. Control 47

7.2 Processor, ROM, RAM and EAROM

7.2 Processor, ROM, RAM a nd EAROM

7200

CPU

data

adres

20 bits8 bits

56 12

I2C-3

SDA SCL

data

adres

ROM

512k

7202

Operating control is built up around a 16-bit microprocessor with an internal interface for ROM, RAM and direct input and output ports. Speedy interruption of the program can be achieved via the interrupt lines. There are three IC busses:

• The "SLOW" has a clock frequency of 100 kHz.

• The "FAST" operates at 400 kHz.

• The third bus is only used for the EAROM (Non Volatile

Memory). The software is located in the 512 kByte ROM, IC7202. Use of a 1 MByte ROM is also possible. If the output enable line on pin 24 is low 8 data bits are placed on the data bus. The working memory consists of a 32 kByte RAM, IC7206. The 8 data bits are read out if pin 20 is low. If pin 27 is low the RAM can be written to. All temporary changes to parameters of the set in operation are stored here. The contents are lost when the set is switched off. The Non Volatile Memory, IC7212, contains the pre-set and program data of the transmitters, option codes and sound and picture adjustments, etc. The EAROM used has a capacity of 2 kByte (16 kBit).

7206

data WR

RAM

32k

Personal notes

627 5

NVM

16k

7212

CL 96532069_033.eps

120799

Page 48

48 7. Control FTV1.9EE Receiver Box

7.3 The output interface

OUTPUT INTERFACE

7200

CPU

2 3

5 14

SDA SCL

strobe

inputs interupts

outputs

Because the microprocessor does not have enough outputs, 2 external output expanders are used. IC7204 and IC7213 provide the extra outputs (16). These IC's, shift registers of the type HEF4094, are controlled by the IC bus. As the HEF4094 IC's do not support IC communication, the use of an extra strobe pulse is necessary. When the strobe on pin 1 becomes high the data bits on the SDA line will read into the buffers. After 16 clock pulses (SCL) each register in both IC's contain a data bit from the serial sequence. The output enable pin 15 is permanently high so that the bits are available on the outputs. The microprocessor can receive interrupts from TXT, the I/O panel, stand-by and. There are three IC busses and an RC5 input. The lines FRNT_01 to FRNT_05 are used for LED control and control keys.

I2C-F 400kc

SDA SCL

I/O EXP

outputs

7204

321

I/O EXP

7213

I2C-S 100kc

15153

outputs

CL 96532069_034.eps

240899

Outputs:

• Sound mute (SOUND_ENABLE)

• Strobe output expanders HEF4094 (STROBE)

• Comb filter colour system selection (SYS1 and SYS2)

• SECAM notch filter on (SEC_NOTCH)

• Service LED (IR_LED)

• Stand-by (STBY)

Inputs:

• RC5 receiver (RECEI_RC5)

• Local keyboard and LED's (output) (FRNT_01 to 05)

• Video recognition Front-End (STR_FE)

• Power on Reset pulse (POR1)

• Protection line (PROT)

• Interrupt Source Select (IRQ_SS)

• Interrupt TXT (IRQ_TXT)

• Interrupt D2B/RGB kill (IRQ_D2B/RGB_KILL)

Page 49

FTV1.9EE Receiver Box 8. Featurebox 49

8. Featurebox

BLOCK DIAGRAM FEATURE BOX 4

(NATURAL MOTION)

U50 V50

Y50

SWCK SWCK SRCK

7440/7441 74507447

PRE

FILTER

FRONTIC

ADC

12 Bit

PAL PLUS

PANEL

UP CL

UP DA

7445

12 Bit

7446

MEM1 3MBIT

MEM2 3MBIT

SRCK

The feature box 4 (also called FBX4) is the successor of the digital scan (FBX3) box. The Y,U,V signals are converted to digital information within the the Featurebox - FBX4. The line frequency is doubled to a line frequency of 32kHz. The frame frequency remains the same. The PDP can not handle frequency above 72Hz. In case of a 60 Hz signal, for example NTSC-M, these 60 Hz based signals are not converted to 120 Hz but to a 60 Hz signal without interlacing. This means that the line frequency is 2fh but the frame frequency remains 60 Hz. The Featurebox also contains extra digital features as Natural Motion, zoom-function and noise reduction. Also the AARA Automatic Aspect Ratio Adaptation is performed in the feature box. After storing, processing and reading the digital information is converted back to analogue Y, U and V information, but then based on a 2fh line frequency. The Y, U and V are fed to the outputs for further processing. The Feature-box 4 can be divided in the following blocks:

1. Functions of the FBX4.

1. Introduction.

2. Natural motion.

2. Block diagram.

3. FRONTIC.

4. AI panel.

1. LIMERIC.

2. SMARTIC and Autoformat AARA.

3. PANIC.

5. MELZONIC.

12 Bit

6. Eco-BENDIC.

D N R

MELZONIC

Motion

Estimation

Vert.Zoom

Progres.Scan

12 Bits

VA HA

32MC16MC

12MC

ECO

BENDIC

XTAL

Data

Address

MICROPROCESSOR

CL 96532069_019.eps

VD HD

Y100 U100 V100

RESET

7505

I2C

240799

Page 50

50 8. Featurebox FTV1.9EE Receiver Box

8.1 Functions of the FBX4:

The functions within the FBX4 are listed below and can be found more in details in the next paragraphs:

• Motion-vector compensated field rate upconversion (50 to 100 Hz) AABB.

• Motion estimation.

• Motion-vector compensated line flicker reduction AB`A`B.

• Movie fast detection (LFR switch off for cinematic picture).

• Noise reduction DNR.

• Variable vertical zoom.

• Digital luminance peaking.

• DC frame.

• Horizontal zoom function.

• PALplus possible.

Introduction

The Feature Box 4 is based on the Feature Box 3, but in addition this FBX also has the possibility allowing movements to flow more freely, called "Natural Motion". This function is also known as motion estimation and compensation. For this function the PROZONIC-IC (PRogressive scan, ZOom and Noise reduction IC) from Feature Box 3 is replaced with a new IC called MELZONIC (Motion Estimation, Line flicker, ZOom and Noise reduction IC).

Personal notes

Natural Motion

The basis for the picture not following naturally is the fact that a TV picture only changes 50 times a second. That means that on movement the position on the screen is only changed once every 1/50th of a second (Raster A1, Raster B1, Raster A2, etc.). When displayed on a 100 Hz TV all pictures are displayed twice, whereby the 2 successive pictures remain the same (A1, A1, B1, B1), so the number of actual positional changes therefore also remains the same. The natural motion" function will generate a third picture between the two existing pictures, which will move the position of a moving object to such an extent that it is located between the position of the object in the first picture and position of the object in the second picture. The result is that on a 100 Hz display moving objects in the intermediary pictures (A1', B1') have a modified position in relation to the original pictures (A1, B1), with motion appearing more natural as a result. When displaying cinema films (that originally only showed 24 Frames per second) the picture contents only changes 25 times a second. This means that every 4 frames in a 100 Hz picture have the same picture content. In this case natural motion once again generates intermediary pictures, resulting in movements appearing to flow more smoothly.

Page 51

FTV1.9EE Receiver Box 8. Featurebox 51

8.2 Block diagram

The YUV signal is offered to 3 low-pass filters that cut off the highest frequencies in order to avoid aliasing. The signals are offered to the FRONTIC (IC7440). This IC contains a triple A/D converter and a sample function. The sample rate is determined by the used horizontal zoom mode. Once the signal has been digitised the information is processed by the Al (Artificial Intelligence) panel and eventually by the PALplus module. The 12 bit information is written into MEM1. Memory 1 and 2 both consist of 3 memories of 1 MBIT, of which 2 memories are used for the Y signal and 1 memory for the U and V signal. The write clock runs at 16 MHz and read clock at 32 MHz. The 100 Hz YUV signal is offered to the MELZONIC (IC7447). By using both MEM2 and MEM1 the MELZONIC has two complete frames at its disposal. With this information the MELZONIC can perform the following functions:

• DNR or Dynamic Noise Reduction.

• LFR or Line Flicker Reduction.

• Progressive Scan

• Zoom function, (vertical)

• Motion estimation

Via the signal processing in the MELZONIC the data is offered to the Eco-BENDIC. The Eco-BENDIC operates with an external 12 MHz crystal. All clock signals are generated in the Eco-BENDIC. 50/100 Hz conversion is performed with one clock system. The read clock is divided by 2 internally and used as the write clock. The EcoBENDIC is controlled by the up (IC7505) via address/data lines. The display clock is locked with the BK50 pulse (burst key 50 Hz) by means of an internal PLL. The Eco-BENDIC is synchronised using line and frame pulses originating from the sync IC, this IC Is located on the SSP (TDA9144). The FBX-up is connected with the main up via I2C, and with the Eco-BENDIC via an address/data bus. The up receives a reset impulse on start up. The YUV signal is offered to the video control IC via 3 filterstages.

Personal notes

Page 52

52 8. Featurebox FTV1.9EE Receiver Box

8.3 FRONTIC-IC

INY

INU

INV

CREFH

CREFL

+5V DIG

CLREF CLAMP

27 20

29 28

CLAMP

+5V ANALOG

31925

3734 16

8 BIT

A/D

8 BIT

A/D

8 BIT

A/D

SERIAL INTERFACE

41 40 UPDA

UPCL V50

FRONT IC

CLOCK

ON/OFF

NOTCH

DELTA

DTO

TDA8753

HOLD

SIGN

LPF

INTERPOL.

DOWNSAMPL.

RESET

DELTA

INTERPOL.

DOWNSAMPL.

RESET

DELTA

MEMORY

INTERFACE

19 18

HREF WE

U AND V

FORMATTER

IC7440

12 13 14

DELAY

CL 96532069_039.eps

240899

MSB=Y7

2 3 4 5 6 7

U1 U0 V1 V0

WEO

The FRONTIC (FRONT-IC) contains three 8-bit D/A-converters and provides also the possibility for a horizontal zoom-mode (only used in case of no AI-panel). The analogue 50 Hz Y, U and V-signal is fed to the three 8 bit flash-A/D-converters. On every clock impulse of 16 MHz a sample from the input is digitised. The 8 bit Y, U and V information is fed to the digital sample rate converters via filters. These converters can vary the number of samples by holding samples for longer and thereby disregarding others. The Y-signal from the A/D converter remain still 8 bit; the U and V-signals are subsequently compressed into a total of 4 bits / 16 MHz.

Personal notes

Page 53

FTV1.9EE Receiver Box 8. Featurebox 53

8.4 AI panel (PALplus - optional)

AI-PANEL (PAL PLUS)

AI-Panel

7007

Subt.

7006 70107008

Limeric Smartic Panic

U - V

RAM

µP

U - V

7009

8b 4b 8b 4b

Frontic

A/D conv.

timing

Snertbus

7440/7441

FBX

For picture improvements the Feature Box can be expanded with an Al panel (Artificial Intelligence). This is a small add-on board which can contain the LIMERIC (Llne MEmory noise Reduction IC) and/or SMARTIC (Subtitle Movement and ARTifical Intelligence IC) and/or PANIC (PANorama IC) function. All 3 IC's are described in short. The Al print receives the digital 8 bit Y signal and the 4 bit U/V signal that originate from this FRONTIC in the FBX. The three IC's are driven by the so called "SNERTBUS" In the FBX, which also supplies and receives a number of timing and clock signals from the Al-panel. The memory in the FBX receives the signals generated.

LIMERIC:

Noise reduction

LIMERIC stands for Llne MEmory noise Reduction IC. This IC takes care for noise reduction on line level. As noise consists of unpredictable peaks which are difficult to filter out of the picture content. The following constraints should be mentioned:

• Noise has no relation with the pixel next to it. Picture information normally does have such a relation unless there is a very rapid changeover.

• Noise has no relation with the previous and the following picture line. Picture information normally has this relation (especially when there is no relation with the pixels next to it).

Mem.

50 - 100Hz

CL 96532069_021.eps

240899

• Noise has no relation with the following and the previous frames. Picture information normally does have this relation unless there are fast movements.

• With these 3 criteria's noise can be recognised.

Operation

The LIMERIC gets the digital video signal, which will be split up in chrominance and luminance. From the picture blocks are selected in which no movements appear (e.g. a grey block in the picture); in these blocks it is the easiest to recognise noise. For these blocks the amount of noise is determined. This amount is quantified in a value. By making such a value continuously frame after frame, a factor can be extracted which is called the noise-factor. With this factor the noise filter can be adjusted. This can be done both with the DNR (Dynamic Noise Reduction) in the MELZONIC and as linenoise reduction function in the LIMERIC:

• In case of an noiseless picture both the LIMERIC noise reduction as the DNR is switched off

• In case of a weak noise the DNR is switched on at a level which is determined by the noise-factor, and the LIMERIC noise reduction is switched off.

• In case of medium noise the DNR is switched to the maximum level and the noise reduction in the LIMERIC slowly starts.

• In case of strong noise both the DNR and the LIMERIC are switched on.

Page 54

54 8. Featurebox FTV1.9EE Receiver Box

8.4 AI panel (PALplus - optional)

AI-PANEL (PAL PLUS)

AI-Panel

7007

Subt.

7006 70107008

Limeric Smartic Panic

U - V

RAM

µP

U - V

7009

8b 4b 8b 4b

Frontic

A/D conv.

timing

Snertbus

7440/7441

FBX

Noise reduction in the LIMERIC

DNR at line level is done by the LIMERIC. In the LIMERIC IC every pixel is compared with 5 pixels from the previous line and with 3 pixels from the same line. In case a pixel is recognised as noise, by then an average is calculated of the surrounding pixels. This calculated pixel is inserted on that spot.

SMARTIC

Purpose

The SMARTIC IC (Subtitle Movement and ARTifical Intelligence IC) is used as a digital dynamic contrast adjustment and replaces the previous analogue black stretch. The purpose of this adjustment is to increase the impression of contrast. The subtle movement feature is not used .The SMARTIC has its own processor. In case subtitle shift" is applied the circuit also contains extra RAM memory. Also the Auto-Format-function is realised with the SMARTIC. This solution is completely independent of the main software. The SMARTIC detects which percentage of the total active picture is black for a longer time. Based on this information a correct expanding factor is calculated and applied. AARA (Auto Aspect Ratio) has to be switched off in case of DW/ multi PIP or PALplus by the software.

Mem.

50 - 100Hz

CL 96532069_021.eps

Personal notes

U V

240899

Page 55

FTV1.9EE Receiver Box 8. Featurebox 55

8.4 AI panel (PALplus - optional)

PANIC

64 µs

Samples

200 Samples

150

Samples

Fig. a.

64 µs

200 Samples

Samples

4/3 DISPLAY IN 16/9 SET

ZOOM

4 7

RST

LINEAR

ZOOM

ZOOM CONTROL

SUPERWIDE

ZOOM

CLK-32CLK-16

315

Fig. b.

PANIC

The purpose of the PANIC (PANorama IC) is to achieve a horizontal zoom function by using of "sample and insert". The vertical zoom function is realised by the MELZONIC.

• 4/3 displayed on a 16/9 screen (fig. a) The PANIC insert in every line 50 black samples; the content of the picture is compressed by exchange of 4 samples of the original picture content by 3 "new" samples (algor. operation). The sampling frequency of 16 MHz is high enough so that no lost of resolution is visible.

• Super-Wide The PANIC provides a new calculation of the samples; on the left and the right side of the picture new samples are generated and inserted by the PANIC; in the middle of the picture the original value of the samples remain.

• ZOOM function The zoom function is realised by using only 50, 33 or 25 % of a line and insert one, two or three samples in the line by using a arithmetic operation. The complete line is a product of adding the new samples with the samples generated by the interpolation. Because of this fact the horizontal resolution decreases. Also the vertical resolution decreases by the same factor (see fig b).

Personal notes

CL 96532069_024.eps

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Page 56

56 8. Featurebox FTV1.9EE Receiver Box

8.5 MELZONIC

MELZONIC

Max. 107 blocks

1 3 5 7 105 107

2468 104106

3 5 7 105 107

2468 104106

Max. 74 blocks

16 Pixels

xxxxxxxxxxxxxxxx

4 Lines

x x x

Motion estimation

Motion estimation and DNR at frame level is performed by using the MELZONIC (SAA4991). In addition this IC also contains all the features of the PROZONIC.

Principle

A frame is split up into different blocks. 1 block consists of 16 pixels and is 4 lines high. A frame therefore consists of approximately (horizontal) 107 blocks x (vertical) 74 blocks = +/

- 7918 blocks. The value of every block is determined in a frame. A search is subsequently made in the adjacent blocks in the following frame for the block with the same contents. Following comparison a vector is determined that indicates the movement of that block. After the comparison of 2 complete frames, these vectors are then used to determine the content of the 2nd and 3rd frame. This results in two new frames being made, the motionless parts of which remain in the same position, with the moving parts being shifted into a position located between the position of that part on the first and fourth frame. As is apparent from the above, natural motion works extremely effectively on objects that move over the screen with a speed of +/- 16 pixels per 20 ms. This is equivalent to the movement of a specific object from left to right across the screen in +/- 2 sec.

1 Block

CL 96532069_036.eps

240899

Natural motion is therefore also especially effective on cinema (movie) pictures , considering the limited number of pictures per second (25 frames a second). The block diagram of the MELZONIC IC is internally very similar to that of the PROZONIC IC, which is logical considering that many functions are the same. Two areas have been added for natural motion:

• Motion estimation, where movements are estimated;

• Motion compensation, which adjusts the pictures. This

adjustment is performed in real time.

Page 57

FTV1.9EE Receiver Box 8. Featurebox 57

8.6 ECO-BENDIC

8.6 E CO-BENDIC

The 12 bit signal originated from the MELZONIC is offered to the ECO-BENDIC (Back-END-IC). All clock-signals are generated by the ECO-BENDIC. The IC is controlled by the microprocessor via address/data lines and delivers the digital processed YUV-signals to the IC7580 (TDA9177).

Personal notes

Page 58

58 9. Double window FTV1.9EE Receiver Box

9.1 General:

9. Double window9.1Genera l:

The Double-Window-module is build up around the PIPO (Picture In Picture Out) processor SAA 9077. The circuit is able to process PIP, POP or DW-signals, but in FTV 1.9 only the DW-function is used.

Personal notes

Page 59

FTV1.9EE Receiver Box 9. Double window 59

9.2 Introduction

The Video DualScreen picture consists of 2 sections of the same size:

• The left-hand section is the main picture originating from the main tuner or from RGB, CVBS or SVHS signals from external sources.

• The right-hand section is the sub-image originating from the 2nd tuner or from CVBS or SVHS signals (no RGB signals) from external sources. The video decoding for the subimage takes place on the Video DualScreen module and makes no use of the COMB filter and LTP. The result is that the picture quality of the sub-image is generally a little less than that of the main picture.

• 1fh RGB signals from externals can not be used in the sub signal part because the Eco Euro I/O has only 1 RGB output.

• Multi PIP (Active Mosaic) and photo-finish are made in the Double Window module.

• The Double Window YUV signals are inserted on (1fh basis).

• DW can not be combined with a VGA main picture.

Personal notes

Page 60

60 9. Double window FTV1.9EE Receiver Box

9.3 Block diagram Video Part

C_DW

CVBS/Y_DW

TO MAIN TUNER

BLOCK DIAGRAM VIDEO

PIPO

SAB9077

+5V

VTXT

H_TXT

74HC4053

Y_MAIN

U_MAIN

V_MAIN

TDA8601

Y_DW

U_DW

V_DW

DFB2HA

HDISP

CL 96532069_028.eps

240899

SC 1fH DW

74HC4053

RF IF CVBS

SPLITTER

TUNER

PCF8574T

I/O

EXPANDER

TDA9600 TDA9802

POS/NEG

EXT/INT

POS/NEG

FBLK

TXT/EXT

CVBS/Y

EXT/INT

PAL DELAY LINE

TDA4665

-(B-Y) -(R-Y) U V

COLOUR

DECODING

TDA9143

3X LPF

RGB_DW

Hdisp TXT

MY MU MV

SPHsync

SPVsync

DFB1

FBLK

TXT/EXT

The following blocks can be distinguished on the Video Dual Screen module:

• PLL tuner - UV1216D which is driven via I2C-bus

• TDA980x is used for IF demodulation.

• The PCF8574AT controller IC9N is used in order to set the

switching signals from the IF demodulator into the correct mode. Via a source selector IC9L - 74HC4053 a selection is made between TUN_CVBS (from the Video Dual Screen tuner) or CVBS PIP (from the I/O-Panel on the SSP). At the same time this IC9L can be used to select between CVBSPIP or YC-PIP. The Y/CVBS-PIP or CVBS TUNER signal and the C-PIP signal are fed to the TDA9143 IC9J on the Video DualScreen module. Together with the delay line IC9K - TDA4665 the CVBS or SVHS signal is converted here to the SUB-YUV signals together with the sync signals SPHsync and SPVsync.

• The RGB-TXT inputs of this TDA9143 are not used here. The sub-YUV signals (SY, SU, and SV) together with their sync. signals SPVsync and SPHsync and the Main-YUV signals (MU, MY, MV) with their sync signals HA = SC_1FH = DPHsync and VA = DPVsync are placed next to each other in the PIPO (Picture In Picture Out) IC9A SAB9077.

• The RAM IC9E is used as the memory. The output of the SAB9077 DW-YUV signals (DY, DU and DV) are fed directly to the fast switching IC IC9M which is controlled by the I/O-expander PCF8574T

• The output of the TDA8601 is offered to the feature box FBX4 to convert the signals to 2fh and to process feature like natural motion; DNR etc.

Personal notes

Page 61

FTV1.9EE Receiver Box 9. Double window 61

9.3 Block diagram Video Part

VIF-DEMODULATOR

Detailed description

The sub tuner on the DW-module receives his input signal from the splitter located at the main tuner on the SSP. The sub-tuner is I2C controlled and offers his IF-output signal via a filter stage to the input (pin 2) of the IF-IC 9G TDA9802. The TDA9802 is a multi standard VIF-demodulator which can process pos. and neg. modulation. It contents a 3-stage amplifier; an alignment free FM-PLL detector stage, AGC control and an AFC-loop. The CVBS output signal of the IF-stage is fed to the video switching IC 9L (MC14053). By using the pins 9, 10 and 11 a choice is made between the internal and external signal. The Double Window module sub signal part can handle off-air, CVBS and Y/C signals (video only, NO SOUND!!). 1fh RGB signals from externals cannot be used in the sub signal part because the Eco Euro I/O has only 1 RGB output. SourceMainSub Off-air CVBSYesYes Ext. CVBS, Y/C, YUVYesYes 1Fh YesNo The output signal is offered via the pins 4 and 15 to the colour decoding IC TDA 9143; pin 26 receives the Y/CVBS; pin 25 the C-signal. The function of the TDA 9143 is identical with the TDA9144 on the SSP but no helper-line detection (for PALplus) is integrated. 1fh RGB from a TXT decoder can in principle also be handled by the sub signal part. However this is not used in FTV1.9.

CL 96532069_008.eps

240899

For PAL sets a colour delay IC TDA4665T works in combination with the chroma-IC. The SUB_YUV-signals from the TDA9143 and the MAIN_YUV signals are offered to the PIPO-IC SAB 9077 which processes double window and multi PIP. The Main YUV signal is routed to the DW module via the S93 YUV connector after the TDA9144. It can either be routed back to the SSP unaffectedly or it can be compressed and combined with a compressed Sub signal (second signal from the IO module or 2nd tuner) to form the double window picture. The output-signals of the PIPO-IC (pin 83,88,90) are delivered to the fast video switch TDA8601T / IC 9M which is controlled by the main up via pin 5; by that a decision whether main or DW-signal will be displayed is determined.

Double-Window restrictions

The double window panels has several restrictions which are:

• DW can not be combined with VGA because DW is already inserted in the main picture before the feature box.

• DW can not be used for TV/TXT combination because the readability for TXT is low if it is compressed by the DW module, especially because of the new user interface that is used for FTV1.9.

• TXT can be displayed in mixed mode over (on top of) the DW picture.

• The base band signal of the second tuner can not be switched to the external outputs. Because of that it is not

Page 62

62 9. Double window FTV1.9EE Receiver Box

9.3 Block diagram Video Part

possible to decode scrambled signals in the DW Sub picture.

Personal notes

Page 63

FTV1.9EE Receiver Box 10. Teletext 63

10.1 General

10. Teletext10.1General

TXT-PANEL

IC7051 SDA5270

SDA SCL

33736

HDISP

CVBS

IC7250

SAA5231

PLL

VIP

VCO

The teletext decoder is built up around the teletext processor SAA5278 and a memory IC. All TXT circuits (except the page memory) are located in the SAA5278. A 27 MHz crystal oscillator around PLL IC7050 provides the timing for all circuits in the IC. The 27 MHz clock is fed to the TXT IC via pin 6. The CVBS signal is connected to pin 27 of the Video Input Processor IC7250. The teletext data is then fed to pin 52 of the TXT-processor. The signal is offered to the memory via the DRAM interface. The TXT information is written into the external memory The voltage on pin 1 and pin 68 determine whether 1 or 2 external memories are present. One memory of 1Mb can contain 150 to 200 pages, depending on the text content. The teletext IC contains an internal memory for 32 pages, which are stored as full pages. In this manner certain pages can be displayed extremely quickly (e.g. subtitles). The requested TXT page is read from memory and converted into ASCII codes. The pages are converted to RGB signals via a character generator and transmitted via pins 24, 28 and 29 respectively. The Fast Blanking is output on pin 31. The colour look-up table (CLUT) makes it possible to make use of 256 colours and tints. This is used for the menu control. By performing Text Level 2.5 the same value of colours and characters can be used in teletext. R, G and B output are offered to the video control IC via an emitter follower. FBl is offered direct.

CONTROLSYNC

CHARACTER

GENERATOR

MEMORY

CONTROL

MEMORY 1 MEMORY 2

Personal notes

TRQ-TXT

FBL

CL 96532069_042.eps

TO VIDEO CONTROL

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Page 64

64 11. Audio video buffer FTV1.9EE Receiver Box

11.1 Functional block description

11. Audio video buffer11. 1Functional b lock description

AUDIO VIDEO BUFFER

PDP

RGB+RC5+UART

SSP

HD/VD

Sounden.

POR

I†C RC5 RGB

CONTROL

RC5

HD/

Sand

castle

The function of this panel is to interface the signals between the panels inside the Receiver box, and to interface the Receiver- with the Display box via a VGA cable. The audio-video buffer can be divided in 5 blocks:

– Control/RC5. – RGB selection. – Sandcastle generator. – Audio selection. – YUV to YC decoder.

The AV-buffer has several internal and external connections: Intern:

• AUDIO, VIDEO, RC5 via Front I/O-panel

• I2C, YC, H, V, RGB, AUDIO, RC5, SOUND_ENABLE, POR

via SSP

• AUDIO via Euro-I/O

• YUV, AUDIO via YUV-panel

Extern:

• RGB_OUT, RC5, UART via sub_D (upper rear connector) to Display Box

• AUDIO_OUT via CINCH to Display Box

• VGA_IN via sub_D (lower rear connector)

• VGA_AUDIO_IN via CINCH

• SURROUND_SOUND_CENTER_IN via CINCH-

connection (middle rear connector)

System bits

Sound-enable + por

Select

SC_2FH

YUV/ YC

i n

L/R

Personal notes

Head-

Front

phone

L/R

AUDIO

I/O

RGB

select

RGB

H&V

VGA

EXT

YUV

L/R

RGB

SSP

CL 96532069_101.eps

I/O

PDP

SSP

Center

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Page 65

FTV1.9EE Receiver Box 11. Audio video buffer 65

11.2 Control/RC5 (See diagram AVB1)

11.2 Co ntrol/RC5 (See diagram AVB1)

CONTROL / RC5

SCL

SDA

VGA

SSP

7400 AVB201

I/O

EXPANDER

MONITOR

SELECT

PRESENT

7700-B

NTSC

PAL/NTSC

PAL-BG

PAL-N

PAL-M

R out

G out

B out

UART in

UART out

RC5

HS out

DISPLAY BOX

(monitor)

VGA

SSP

RC5 BOX

RC5 PDP

7700-A

7700-C

The I/O-expander 7400 (PCF8574) sets the system-lines that are used in the YUV to YC decoder. There are also the 'SELECT' and 'MONITOR PRESENT' signals. Explanation:

• 'SELECT': This signal is fed to switch 7700A and 7700B, to make a choice between the different synchronisation pulses.

• 'MONITOR PRESENT': Detects whether a monitor is present. This signal goes to switch 7700C, which is switching the RC5 from the Receiver-box or the RC5 coming from the monitor. When the monitor is present the RC5-receiver is only active on the monitor.

On the connector AVB201 (sub_D out) we have two UARTdatalines, which are fed to the monitor. The UART is needed for the communication between the µP of the E-box and the µP of the monitor.

VS out

AVB01

RC5

SSP

CL 96532069_110.eps

Personal notes

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Page 66

66 11. Audio video buffer FTV1.9EE Receiver Box

VIDEO SELECT

Select

7700

SYNC

from SSP

7706

HS_OUT

7700

SYNC

ext VGA

RGB

from SSP

2, 5, 12

7706

VS_OUT

RGB SELECT

Select

7800

RGB

ext VGA

1, 3, 13

74HC4053

RGB_OUT

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Page 67

FTV1.9EE Receiver Box 11. Audio video buffer 67

11.3 Source selection

11.3 S ource selection

SYNC (see AVB1): With the same SELECT signal, the matching SYNC signals are selected. The 2fh H-sync, coming from the SSP, is inverted in the AV Buffer, this to ensure proper video mode recognition in loopthrough at the 2nd display. From the R-box to the first Monitor, video mode recognition is done via the UART bus. If a 2nd Monitor is connected via the loopthrough, the UART bus is not longer used. So to ensure mode recognition in this case, the H-sync is manipulated (inverted). This will be recognized by the

P in the 2nd monitor, so the correct video mode will be chosen.

VIDEO (see AVB2): The selection between RGB from the SSP (AVB59) or EXT VGA (via sub_D) is made in the block 'RGB Select'. The RGB-signals from the video-control-IC of the SSP go via an emitter-follower to the switch IC7800. The VGA signal coming from extern is divided by two and goes via an emitter-follower to this switch IC. The SELECT signal, coming from the I/O expander (PCF8574) defines the position of this switch-IC (4053). Because the output-impedance is 75 Ohm, the RGB-output signals are amplified by two.

Personal notes

Page 68

68 11. Audio video buffer FTV1.9EE Receiver Box

11.4 Sand castle generator

11.4 San d castle generator

SAND CASTLE GENERATOR

+5VA

3709

2K2

390p

2709

+5VA

+5V2

7708-B

74HCT4538

RCX

4R7

3717

+5VA

3711

2K2

3710

4.5V

2.5V

0.5V

+13V

3712

22K

7715

47K

BC847B

3715

3714

CL 96532069_105.eps

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27114p7

3713

B65

RCX

+5VA

B66

6707

BAS216

6708

BAS216

7708-A

74HCT4538

22n

2717

10u

2715

+5VA

1014

B64

3707

4K7

3708

560p

2708

+5VA

22n

7707-E

74HCT14D

2707

+5VA

2719

11 10

100p

+5VA

13 12

SAND CASTLE GENERATOR

7707

BUFFER

CLAMPING BUFFER

SC_2FH

CL 96532069_104.eps

041099

The Video Control IC on the SSP needs a 3-level sandcastle pulse, which is synchronised with the sync pulses of the selected source. This sandcastle pulse is generated by two monostable multivibrators, which are derived from the HD- and VD-signals.

On pin 12 (7708B) we have the HD pulse that drives the first mono stable multivibrator. R3709 and C2709 determine the RC-time. So on pin 10 we get a pulse of 0.7 µsec. This pulse goes via a buffer to the second mono stable multivibrator (pin 5 of 7708A), where the clamping pulse is generated. The second mono stable multivibrator has a RC-time of 2.3

sec. Via R3711 and R3710 those two pulses are added and

after the emmiter-follower we get the sandcastle-pulse.

Page 69

FTV1.9EE Receiver Box 11. Audio video buffer 69

11.5 Audio

11.5 A udio

SET-UP for AUDIO

FRONT I/O

L_SAT

L_FRNT

L_PRC_IN

L_YUV_IN

AUDIO_VGA_L_IN

SURROUND_SOUND_CENTER

EURO

SSP

Audio

Procsessing

L/R FRONT out

L/R SAT out

I/0

L/R_AUDIO

L/R_PRC

=processed

SET-UP for AUDIO

AUDIO_TO_MONITOR_L

L_SAT_OUT

AUDIO_TO_MONITOR_R

R_SAT_OUT

R_FRNT_OUT

L_FRNT_OUT

7901 TEA6422

10, 11

6,19

R_SAT

R_FRNT

R_PRC_IN

R_YUV_IN

AUDIO_VGA_R_IN

SURROUND_SOUND_CENTER

MUTEMUTE

L/R_AUDIO_FRONT

A/V buffer

CL 96532069_109.eps

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8, 17

9,16

7, 18

L/R VGA in (rear)

SURROUND center in (rear)

YUV-panel

L/R YUV in (rear)

DISPLAY box (monitor)

12,13

L/R AUDIO to PDP

CL 96532069_108.eps

110899

Compared to the GFL SSP 3 inputs and 1 output: are added:

• VGA Audio input.

• YUV Audio input (optional).

• Surround Sound Center input (Display-box used as centre,

with external Dolby decoder).

• Audio output to Display-box. Those added in-and outputs are fed to the SSP via the AVbuffer. The other in-and outputs are fed to the Euro-I/O-board. The switching is done via the TEA6422, which is I2C-controlled. The outputs that are not used are (software) muted to avoid cross talk. The SOUND ENABLE and the POR-signal avoid plops when switching on/off the set.

Page 70

70 11. Audio video buffer FTV1.9EE Receiver Box

11.6 YUV to YC Decoder

11.6 YUV t o YC Decoder

YUV to Y/C DECODER

7130 TDA8501

1 5 1

The YUV to YC decoder translates the YUV-signal, coming from a DVD-player, to an YC signal. This is necessary because the SSP-panel can not handle YUV-signals. Advantage is that the source-signal, fed with the YUV input, now can be processed in several manners, e.g. Double Window, PIP,... and can be fed to the YC output. The frequency of the burst is dependent of the broadcasted TVsystem. Systems that are foreseen:

• PAL-M.

• PAL-N.

• PAL-BG.

• NTSC-M.

System-selection is done via software. Via the I/O-expander the right system-information becomes available. In this way the right crystal is connected to the oscillator-input (pin 23) of IC7130 (TDA8501). The YUV-signal is amplified and fed to IC7130 (TDA8501). On pin 4 and 17 we have the selection between PAL or NTSC. With potmeter (R3134) we can adjust the position of the burst. On pin 22 the Y-signal comes out and after passing a delaycircuit it is inserted back in the IC at pin 20. The output (YC) is fed to SSP (S61) via an emitter-follower and an impedance matching of 75 Ohm.

D E C O D E R

Y C

S P

Personal notes

PAL M Y S T

PAL N

PAL BG

PAL/NTSC

T S

NTSC

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Page 71

FTV1.9EE Receiver Box 12. Front I/O panel 71

12. Front I/O panel

START-UP CIRCUIT

AV41

AV44

AV15

AV155

AV33

9 fold

Control

Headphone

3 fold

2 fold

SSP LED

S41

S44

9 fold

S01

I/O Front

Panel

The module contains external connectors for audio and video input and push buttons to control the set. Also a two-way infra red interaction is implemented: a receiver for a remote control unit and a transmitter for service purposes. A similar panel was also present in the FTV 1.5 but this one differs from it on the following points:

• The VGA connector is no longer present.

• An extra connector is placed (AV55) to reduce the number

of wires passing from the I/O Front panel to the A/V Buffer. Because on the A/V Buffer one line (RC5 signal) is needed, it is not necessary to pass the panel with all 9 signal lines of connector AV41.

• The intention was to have this new version compatible with the FTV1.5, but changes on board outlines made this impossible.

Figure 1 shows the interconnections between the I/O Front Panel and direct connected PCBs. Connector types, data directions and numbers of wires are indicated as well. The features of the I/O Front Panel are:

• Front A/V interface (SVHS, CVBS, audio CINCH, headphone)

• Local Controls (push buttons)

• IR receiver

• IR transmitter

LED current

RC5 SET

2 fold

Panel

Box

LP15

Received IR signals Audio / Video

Personal notes

A / V

Buffer

AVB 01

AVB155 AVB33A

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Page 72

72 12. Front I/O panel FTV1.9EE Receiver Box

12.1 Functional diagram

12.1 Funct ional diagram

AV41 (S)

9 fold

JST B9B-EDM-BK

(opt. 1.5)

2 fold

JST B2B-EH-A

AV155 (AVB)

AV33 (AVB)

JST B9B-EDM-WH

9 fold

3 fold

AV44 (S)

JST B03B-EDM-WH

Push

Buttons

receiver

SVHS

connector

transmitter

Front A / V Interface CVBS

connector

LED

switches

AUDIO

connectors

Front I/O Panel E-Box

CL 96532069_165.eps

JST B03B-EDM_W

3 fold

AV15 (LD)

headphone

connector

020999

Front I/O Interface

The front I/O interface has the following features:

• Input for CVBS, Y/C and stereo audio signals.

• Connection for headphones.

• Termination resistors and ESD protection diodes.

• Audio cinch connectors both contain mechanical switches:

when only one audio cinch is connected the (mono) signal will be connected to both left and right audio channels.

• Chrominance input with a high impedance for DC and with a 75 ohm impedance for AC.

Push buttons

The local keyboard contains 5 buttons:

• Volume up ( V+ )

• Volume down ( V- )

• Page Up ( P+ )

• Page down ( P- )

• Installation ( Inst )

Pressing one of these buttons connects 2 signal lines together, coming from the microprocessor on the SSP panel.

Infra Red Receiver

The infra red receiver output is connected to connector (AV155), to give the possibility to select the display IR receiver or the E-Box IR receiver. This selection will be done in the A/V Buffer.

Infra Red Transmitter

The IR transmitter diode is configured in an emitter follower with a PNP transistor. This makes it possible to achieve large currents through the IR LED what will enhance the emitting range. The IR transmitter is used for service purposes.

LED indication

A two-colour LED is located on the 'LED Panel Box'. The I/O Front Panel creates a limited current to supply the LED. This LED is a bi-colour type which are actually two LED's in one housing.

Page 73

FTV1.9EE Receiver Box 13. Power supply 73

13.1 Standby supply

13. Power supply13.1Standb y supply

START-UP CIRCUIT

e c

R71 10K

BC557B

L6 10UH

R68 2K61

R72 2K43

+5VstbyU

C63 100N 50V

C54 390U

10V

R73 3K3

+5Vstdby

C60 470P 400V

C51 47P 630V

220E

+12Vprim

CNY17-F3

OC3-B

IC4

TNY253P

BC557B

e c

D25

SB160

C53

R69 2K2

R66R60 1K

CNY17-F3

390U 10V

OC3-A

C55

100N 50V

TR2

C62 50V

100N

R67 1K

IC3

TL431CLP

7663692

L12

4S2

C50 10U 50V

C64 100N 50V

L10

D30

1N4148

R84 1M2

D22

MBR1100

General

To enable an energy-efficient stand-by power supply, to less than 100 mW, a controller chip called TinySwitch of Power Integrations Inc. is used. The TinySwitch, TNY253 rated for 5 W supplies, requires very few external components. The output power is proportional to the primary inductance of the transformer, and is independent of the input voltage. Designed to be a simple, on/off control device, the TinySwitch is integrated on chip: 700 V power MOSFET; oscillator; highvoltage, switched-current source; current limit; and thermal shutdown circuitry. The maximum on-time of the power MOSFET is determined by the duty cycle signal (Dmax) of the internal oscillator. Also, the current limit and switching frequency (44 kHz) for the TNY253 are fixed, while the power delivered is proportional to the primary inductance of the transformer. The TinySwitch is powered directly by the incoming high voltage, it eliminates the need for an auxiliary bias winding and associated circuitry, thereby simplifying the design of the transformer. The thermal shutdown threshold is set at 135°C. When the junction temperature exceeds 135°C, the power MOSFET is disabled until the die-junction temperature goes under 70°C. The TNY253 switches at 44 kHz to minimise EMI filtering requirements, and permits the use of a simple snubber clamp to limit drain spike voltage.

CL 96532069_049.eps

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Start-up circuit

Switching on the set, C60 is charged via the diode-bridge D1D4 to a DC-voltage between 150 and 300V, depending on the input voltage. IC4 is supplied directly by the incoming high voltage. When the on-chip oscillator is enabled, it turns the power MOSFET on at the start of each cycle. The MOSFET is turned-off as soon as the output current reaches the upper limit.

Control circuit and oscillation phase

Unlike a conventional PWM controller, it uses an on/off control to regulate the output voltage. IC3 (TL431) and OC3 (OptoCoupler) form the secondary voltage "regulation circuit". IC4 is enabled/disabled by the opto-coupler-transistor connected at pin 4. If the current through the opto-couplertransistor exceeds the 50µA the Tinyswitc is disabled. The feedback is realised as follows: When the output voltage 5Vstdby increases (decrease of the load), the voltage at resistor R72 increases. As a result, the internal resistance of IC3 decreases and results in a current through the diode in the opto-coupler OC3. At the same time a current flows through through the transistor part of OC3, disabling IC4. At the beginning of each clock cycle, the Tinyswitch samples the ENABLE pin to decide whether or not to start a switching cycle. If the ENABLE pin is below its internal threshold voltage no switching cycle occurs. If at the next sample the voltage at the ENABLE pin reaches its threshold voltage, a switching cycle occurs. If not there again is no switching cycle.

Page 74

74 13. Power supply FTV1.9EE Receiver Box

13.2 Switch ON behaviour

13.2 Swit ch ON behaviour

POR CIRCUIT

+5Vstdby

R74 1M8

IC5-F 74HC14

MAINSDIP

FB1

5.1VU

R76 22K

jumper

D26 1N4148

R77

R75 47K

C56 100N 50V

GND

74HC14

D27 1N4148

D28 1N4148

BC557B

IC5-C

74HC14

IC5-B

R81 1M

R78 1K

74HC14

+5Vstdby

IC5-A

C59 100N 50V

IC5-D 74HC14

POR

GND

D29 BAT85

2 1

2M7

R79

C57 22N 50V

R82 47K

STBY

The start-up and shut down is very much different from the GFL behaviour, due to the different power supply architecture. The POR circuit is shown above. The POR pulse is used to initialise the microprocessor and other IC's. After switching on the set via the mains switch, the +5Vstdby is available after approx. 200 msec. The POR pulse becomes high immediately because C56 is discharged at the moment of switching on. After a certain time C56 has charged up and reaches the input voltage at which the output of the inverter changes polarity from "1" to "0". The total start-up time is approx. 700 msec. After the reset of the µP, the µP decides, based upon the stored information, whether the set should remain in standby or should be switched on. In case the set should switch on, the standby signal goes logically low. This logic low level of the standby signal triggers the inverter Schmitt-trigger - IC5A and IC5B. The output of IC5B changes from a logic "1' to "0". Due to this transition signal SC (base of transistor T2) connected via resistor to output IC5-D changes from a logic "1" to "0". During this logic "1", transistor T2 was conducting, connecting the base of transistor T3 to ground, disabling the current through opto-coupler OC1 and the +12Vprim is not connected to pin 7 of IC1 - UC3842.

GND

CL 96532069_050.eps

Personal notes

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Page 75

FTV1.9EE Receiver Box 13. Power supply 75

13.2 Switch ON behaviour

SWITCH ON

+5VSTBY

POR

STANDBY OTHER SUPPLY

VOLTAGES

>0.1s <0.5s

200ms 150ms

t=0

Other situations where a POR pulse is generated:

Mains dip.

The +5Vstby will drop in voltage. Transistor T6 stops conducting, which results in a voltage drop across resistor R72 and capacitor C63. Due to this voltage drop, C56 is discharged and goes below the low input of the Schmitt-trigger. The output of IC5-F generates a POR pulse.

Heavy Load or short-circuit of the +5V2, 8V6, 13V and/or

40V.

When the output is too much loaded or short-circuited, the regulation circuit consisting of IC2, several resistors and capacitor and opto-coupler OC2 gets out of regulation, and signal-point Fb1 rises. If the voltage rises too much, transistor T7 stops conducting and the voltage across resistor R78 will drop. As a result C56 is discharged and goes below the low input of the Schmitt-trigger. The output of IC5-F generates a POR pulse. The set is switched to standby. The other that will happen is that the output of IC5_D changes from "0" to "1". Transistor T2 starts conducting and connects the base of T3 to ground. The current through the diode of OC3 stops and IC1 is no longer supplied via the +12Vprim. The supply stops.

Personal notes

CL 96532069_051.eps

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Page 76

76 13. Power supply FTV1.9EE Receiver Box

13.3 Switch OFF behaviour

13.3 Swit ch OFF behaviour

SWITCH OFF

+5VSTBY

POR

OTHER SUPPLY

t=0

VOLTAGES

When the mains switch ( 1004 ) is pressed to switch OFF the E-box, the voltage at the mains elco starts decreasing. At a certain moment, it reaches a level that is regarded as a mainsdip, see mains-dip at the previous paragraph. A POR pulse is generated before the +5Vstby and the other supply voltages start decreasing. This POR pulse is generated to avoid the main µP from wrong protections and/or error-codes.

CL 96532069_052.eps

Personal notes

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Page 77

FTV1.9EE Receiver Box 13. Power supply 77

13.4 Main supply

13.4 Ma in supply

MAIN SUPPLY

+5.1V

SU02

D14 4V7

R26 220E

K5 K-3P

D15 1N4148

C10 100N 50V

POR

STBY

R25 47K

R39 22K

1N 50V

BC547B

OC2-B

R6 1K

CNY17-F3

R5 4K7

C12C11 10N 50V

+5VstbyU

R27 4K7

T3 BC547B

R28 1K

C13 22N 50V

+12Vprim

R29 100E

OC1 CNY17-F3

Vcc

V_ref

Rt/Ct

V_fb

Comp

GND

10K

C14 10N 50V

jumper

J12

C9 100N 50V

UC3843 IC1

Output

Current sense

BC547B

c e

D5 6V8

R41 2K2

4S2

L11

C15 4N7 50V

R10 220E

D10

BAT85

R40 3M3

R42 150K

R9 220E

C5 470P 400V

R8 150E

C16 100N 50V

2SK2333

KB8

Plated

1E2

R22 220E

R14 220E

C4 680P 630V

TR1

7662661

C17 100P 630V

R13

470E

R12R11 1E2

General Information

The E-box power supply is a Switch Mode Power Supply (SMPS) with a current regulating pulse width modulator IC1UC3843. The topology is a flyback converter with primary current sensing, secondary voltage sensing and mains input measuring. The SMPS works in discontinuous mode, so with a T-on, T-off and a T-dead. Depending on the measured voltage and current the switching MOSFET is driven for a longer or shorter period

Output voltages

• 5V_stb (SSP µP & Control, Euro I/O, AV Buffer, LED panel and front I/O) : + 5V1 This voltage is also present during standby.

• 5V2 (SSP, FBX 4, Euro NICAM, AV Buffer, DW and TXT panel) : + 5V3

• 8V6 (SSP, and Euro I/O panel) : 8V8

• +12V8 (SSP, Incredible Stereo (AY), FBX 4, Euro NICAM,

AVB and DW) : 12V6

• +33V (SSP-front-end, DW) : 40V

Personal notes

CL 96532069_053.eps

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The circuit

The regulator IC7203 UC3842

Page 78

78 13. Power supply FTV1.9EE Receiver Box

13.4 Main supply

The +12 Vprim is via opto-coupler OC1 connected to pin 7; this voltage must exceed 8V5 to start-up the IC (this may not drop below 7 V during operation). The oscillator The IC contains an internal oscillator whose frequency and duty cycle is set by resistor R5 and a capacitor C12, connected to pin 8 and pin 4. Stabilisation By increasing the load on a secondary voltage, all secondary voltages will drop, resulting in a voltage drop on V-ref of IC2 connected to resistor R36. This causes an increase of the voltage at the cathode of IC2 and decreases the current through the diode of opto-coupler OC2, which results in a voltage decrease at pin 2 of IC1 - UC3843. A voltage decrease results in a delay in the MOSFET switch-off time. More energy is stored in the transformer while the MOSFET conducts longer, causing an increase in the secondary voltage. Overload/ Short circuit During overload the secondary voltages drop rapidly, resulting in a strong drop of the voltage at V-ref of IC2 - connected to resistor R36. As a result signal-point Fb1 rises fast and transistor T7 of the POR-circuit stops conducting. As a result C56 is discharged and goes below the low input of the Schmitttrigger. The output of IC5-D changes from "0" to "1". Transistor T2 is switched on and connects the base of T3 to ground. The current through the diode of OC3 stops and IC1 is no longer supplied via the +12Vprim. The supply stops and the set is switched to Standby. The circuit

• The mains voltage is rectified by bridge rectifier D1, D2, D3 and D4 and filtered by C6. The DC voltage across C6 is the DC input voltage for the SMPS at pin 2 of transformer TR1.

• R5 and C12 set the external oscillator frequency; the frequency is approximately 35 kHz.

• Stabilisation occurs via the +12.8V and the +5V2 output voltages which are both fed back to pin 2 of the control IC via the secondary regulation circuit consisting of IC2 and opto-coupler OC-2.

• Current measurement is performed by R11//R12, which voltage is fed back to pin 3.

• Mains voltage control via R40 and R42. R42 couples a part of the rectified mains voltage to pin 3 of IC1. Due to a higher mains input voltage, the voltage at the base of T4 will increase, resulting in a higher DC-voltage at the emitter of T4. The voltage at pin 3 of IC1 is formed by the dividing of R10 and R41 of the voltage at the emitter of T4 minus a zener voltage of 6V8.

Switching the set to standby. The signal STBY goes from a logic "0" to "1". Transistor T2 is switched on via R25 and the base of T3 is grounded. The current flow through the diode of opto-coupler OC1 stops and IC1 is disconnected from the +12Vprim. The power supply stops operating.

Personal notes

Page 79

FTV1.9EE Receiver Box 14. Switch panel 79

14. Switch panel

START-UP CIRCUIT

E-BOX

(partial)

JST B7P-VH

SU161

SUPPLY

SU162

This module contains a mains switch to turn the E-Box power "ON" or "OFF" and a connector to connect the panel to the Supply Panel. The mains switch enables the user to turn the E-box "ON" and "OFF" by interrupting the mains line to the electronics. Figure above shows two modules of the E-Box: the Switch Panel, Supply and mutual connections. The Mains Switch interrupts the power lines 'F-phase' and 'Fneutral'. The output of the switch consists of the lines 'S-phase' and 'S-neutral'.

Mains

JST B3P-VH

out

SWITCH

PANEL

SE161

4 fold

2 fold

JST B7P-VH

Mains in

Mains input

CL 96532069_156.eps

Personal notes

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Page 80

80 15. LED panel FTV1.9EE Receiver Box

15. LED panel15.1LED Mod ule

START-UP CIRCUIT

AV15

FRONT I/O

E-BOX

(partial)

JST B03B-EDM-WH

This module contains a single bi-colour LED to indicate the state of the E-Box. The colours of de LED are red, green and orange (if both red and green are on). The states are shown as follows:

• Red : Standby mode

• Green : Normal operating mode

• Orange : Semi-standby mode

The Front I/O panel supplies the LED by a limited current. Figure above shows three modules of the E-Box: the LED Panel, Front I/O, Supply and mutual connections.

3 fold

JST B03B-EDM-WH

Personal notes

LE15

LED PANEL

CL 96532069_157.eps

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Infra Red Receiver

The infra red receiver output is connected to connector (AV155), to give the possibility to select the Display Box- or the Receiver Box IR receiver. This selection will be done in the A/V Buffer.

Infra Red Transmitter