Hitachi 232 schematic

SERVICE MANUAL MANUEL D'ENTRETIEN WARTUNGSHANDBUCH

CAUTION:

Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual.

No. 0232

26LD6600C

26LD6600D

Data contained within this Service manual is subject to alteration for improvement.

ATTENTION:

Avant d’effectuer l’entretien du châssis, le technicien doit lire les «Précautions de sécurité» et les «Notices de sécurité du produit» présentés dans le présent manuel.

VORSICHT:

Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“ und „Hinweise zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.

Les données fournies dans le présent manuel d’entretien peuvent faire l’objet de modifications en vue de perfectionner le produit.

Die in diesem Wartungshandbuch enthaltenen Spezifikationen können sich zwecks Verbesserungen ändern.

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

COLOUR TELEVISION

January 2007

TABLE OF CONTENTS

1. PRECAUTION 1

2. SERVICE MENU ITEMS 1

2.1. SOUND 1 1

2.2. SOUND 2 2

2.3. Options 2

2.4. Features 2

2.5. Teletext 3

2.6. Tuner Options 3

3. SOFTWARE UPDATE DESCRIPTION 4

3.1. ANALOG SOFTWARE UPDATE via SCART 4

3.2. ANALOG SOFTWARE UPDATE via I2C 5

3.3. EEPROM UPDATE via SCART 6

4. INTRODUCTION 7

5. TUNER 7

6. IF PART (TDA9886) 7

7. MULTI STANDARD SOUND PROCESSOR 8

8. VIDEO SWITCH (TEA6415)+C118 8

9. AUDIO AMPLIFIER STAGE WITH TPA3004D2 8

10. POWER SUPPLY (SMPS) 9

11. MICROCONTROLLER 9

12. SERIAL ACCESS CMOS 4Kx8 (32KBit) EEPROM (24C32A) 9

13. CLASS AB STEREO HEADPHONE DRIVER (TDA1308) 9

14. SAW FILTERS 9

15. IC DESCRIPTIONS 10

15.1. TEA6415C 10

15.1.1. Description 10

15.1.2. Features 11

15.1.3. Pinning 11

15.2. 24LC02 12

15.2.1. Description 12

15.2.2. Features 12

15.2.3. Pinning 12 24C32 13

15.3. 15.3.1. General Description 13

15.3.2. Features 13

15.3.3. Pinning 13

15.3.4. PIN Function Table 14

15.4. 74LVC14A 14

15.4.1. Description 14

15.4.2. Features 14

15.4.3. Pinning 14

15.5. TEA6420 15

15.5.1. Features 15

15.5.2. Description 15

15.5.3. Pin Connections 15

15.6. CS4334 15

15.6.1. Features 15

15.6.2. General Description 16

15.6.3. Pin Descriptions 16

15.7. GAL16LV8 16

15.7.1. Description 16

15.7.2. Features 16

15.7.3. Pin connections 17

15.8. K6R4008V1D 17

15.8.1. Description 17

15.8.2. Features 17

15.8.3. Pin Description 18

TFT TV Service Manual

15.9. KA278R33 18

15.9.1. Features 18

15.9.2. Description 18

15.10. LM1117 19

15.10.1. General Description 19

15.10.2. Features 19

15.10.3. Applications 19

15.11. LM317 19

15.11.1. General Description 19

15.11.2. Features 19

15.11.3. Pin Description 20

15.12. LM809 20

15.12.1. General Description 20

15.12.2. Features 20

15.12.3. Pinning 20

15.13. MSP34X1G (MSP3411G) 20

15.13.1. Introduction 21

15.13.2. Features 21

15.14. M29W040B 23

15.14.1. Description 23

15.14.2. Features 23

15.14.3. Pin Descriptions 24

15.15. MC33202 24

15.15.1. General Description 24

15.15.2. Features 24

15.15.3. Pin Connections 25

15.16. PCF8574 25

15.16.1. General Description 25

15.16.2. Features 25

15.16.3. Pinning 25

15.17. TSOP1836 26

15.17.1. Description 26

15.17.2. Features 26

15.18. PI5V330 26

15.18.1. General Description 26

15.19. SDA55XX (SDA5550) 27

15.19.1. General description 27

15.20. SIL 9993 27

15.20.1. General Description 27

15.20.2. Features 27

15.21. SN74CB3Q3305 28

15.21.1. General Description 28

15.21.2. Features 28

15.21.3. Pin Connections 28

15.22. ST24LC21 28

15.22.1. Description 28

15.22.2. Features 29

15.22.3. Pin connections 29

15.23. LM2576 29

15.23.1. General Description 29

15.23.2. Features 29

15.23.3. Pin description 30

15.24. MC34063 30

15.24.1. Description 30

15.24.2. Features 30

15.24.3. Pin connections 30

15.25. TDA1308 31

15.25.1. General Description 31

15.25.2. Features 31

15.25.3. Pinning 31

TFT TV Service Manual

15.26. TDA9886 31

15.26.1. General Description 31

15.26.2. Features 31

15.26.3. Pinning 32

15.27. TPA3004D2 32

15.27.1. General Description 32

15.27.2. Features 32

15.27.3. Pinning 33

15.28. 34

15.29. µPA672T 34

15.29.1. General Description 34

15.29.2. Features 35

15.29.3. Pin Connection 35

15.30. VPC3230D 35

15.30.1. General Description 35

15.30.2. Pin Connections and Short Descriptions 35

15.31. MAD4868A 37

15.31.1. General Description 37

15.31.2. Features 37

15.31.3. Interfaces 37

15.31.4. Pinning 38

15.32. SVP-EX 59B 38

16. SERVICE MENU SETTINGS 38

16.1. Picture Adjust 39

16.2. SOUND1 39

16.3. SOUND 2 39

16.4. Options 39

17. CABLE CONNECTIONS 41

17.1. Cable Descriptions 42

18. APPENDIX A 43

18.1. ASSEMBLY DRAWING 43

19. APPENDIX B 44

19.1. BLOCK DIAGRAM 44

19.2. SCHEMATIC DIAGRAMS 45

19.2.1. Power Board 45

19.2.2. Main Board 1 (Tuner/IF/Audio) 46

19.2.3. Main Board 2 (In/Out) 47

19.2.4. Main Board 3 (VPC3230) 48

19.2.5. Main Board 4 (Video Decoder) 49

19.2.6. Main Board 5 (DDR RAM) 50

19.2.7. Main Board 6 (MCU Interface) 51

19.2.8. Main Board 7 (HDMI/DAC) 52

19.2.9. Main Board 8 (Power Supply) 53

19.2.10. Amplifier Board (D-Class Amplifier) 54

19.2.11. BAV Board (AV/HP/SV/LO) 55

19.3. CONNECTOR DIAGRAM 56

19.4. PCB LAYOUTS 57

19.4.1. Main Board 57

20. APPENDIX C 58

20.1. PARTLISTS 58

TFT TV Service Manual

iii

1. PRECAUTION

2. SERVICE MENU ITEMS

2.1. SOUND 1

a) Menu Subwoofer => If ON, Subwoofer option is available in TV set, and the item is

visible in sound menu, else Subwoofer is not available. Default “ON”.

b) Subwoofer Level (dB) => This value is gain value of Subwoofer output in dB.

-30...12. Default “0” dB.

c) Subwoofer Corner Freq. (x10Hz) => Last low frequency value that is amplified. 5...40. Default “22” x 10Hz = 220Hz.

d) Menu Equalizer => If ON, visible in sound menu, else invisible. Default “ON”.

e) Menu Headphone => If ON, visible in sound menu, else invisible. Default “ON”.

f) Menu Effect => If ON, visible in sound menu, else invisible. Default “ON”.

g) Menu Wide Sound => If ON, visible in sound menu, else invisible. Default “OFF”.

h) Menu Dynamic Bass => If ON, visible in sound menu, else invisible. Default “ON”.

i) Menu Virtual Dolby => If ON, visible in sound menu, else invisible. Default “ON”.

j) Carrier Mute => If ON, in the absence of an FM carrier the output is muted, else not.

Default “ON”.

k) Virtual Dolby Text => Active if VIRTUAL DOLBY is ON.According to the selection; seen

in sound menu as 3DS or VIRTUAL DOLBY. Default “3DS”.

2.2. SOUND 2

a) AVL => AVL is controlled from this menu by service user. ON/OFF. Default “ON”.

b) Menu AVL => If ON, AVL item is visible in sound menu, and AVL can be controlled from

sound menu by normal user, else AVL is invisible to normal user. ON/OFF. Default “ON”.

c) FM PRESCALE AVL ON => If AVL ON, set value in this item is used as prescale value

for the related standard. 0...127. Default “29”.

d) NICAM PRESCALE AVL ON => If AVL ON, set value in this item is used as prescale value

for the related standard. 0...127. Default “62”.

e) SCART PRESCALE AVL ON => If AVL ON, set value in this item is used as prescale value

for scart outputs. 0...127. Default “28”.

f) SCART VOLUME AVL ON => If AVL ON, set value in this item is used as volume value

for scart1 and scart2. 0...127. Default “116”.

TFT TV Service Manual

g) FM PRESCALE AVL OFF => If AVL OFF, set value in this item is used as prescale value

for the related standard. 0...127. Default “15”.

h) NICAM PRESCALE AVL OFF => If AVL OFF, set value in this item is used as

prescale value for the related standard. 0...127. Default “35”.

i) SCART PRESCALE AVL OFF => If AVL OFF, set value in this item is used as

prescale value for scart outputs. 0...127. Default “14”.

j) SCART VOLOUME AVL OFF => If AVL OFF, set value in this item is used as volume

value for scart1 and scart2. 0...127. Default “122”.

2.3. Options

a) Burn-In Mode => If ON, full screen flashes in RED, GREEN, BLUE colors unless

“Menu” button on Remote Control or Keypad is pressed. This property is used to protect the T V set from burning on the assembly lines in factory. This item becomes automatically OFF, when First APS item is ON or Factory Reset is pressed. ON/OFF. Default OFF.

b) First APS => This bit is set “ON” in the factory. When the TV set is opened for

the first time it directs the user to make automatic search in both digital and analog modes.

c) APS Volume => After First APS function finishes, the volume of the TV is that value.

Default “10”.

d) AGC (dB) => Tuner AGC value. Default “15”.

e) Power-Up Mode =>Normal, Last State, Stand-by. Default “Last State”

f) PDP Working Hour =>Displays Panel Run time in decimal.

g) Factory Reset => OK to activate. When OK pressed on this item, factory defaults

loaded.

h) Enter Flash Mode =>OK to activate. When OK pressed on this item, flash mode is entered,

SW starts to wait for uploading the new SW.

2.4. Features

a) Blue Background => If ON, Blue Background is visible in Features Menu else not.

Default “ON”.

b) Menu Transparency => If ON, Menu Transparency is visible in Features Menu else not.

Default “ON”.

c) Menu Timeout => If ON, Menu Timeout is visible in Features Menu else not. Default

“ON”.

d) Backlight => If ON, Backlight is visible in Features Menu else not.Default “OFF”.

e) Single Tuner => If OFF, two tuners are available on the chassis. Fixed “ON”.

f) Dynamic WB => Default

TFT TV Service Manual

2.5. Teletext

a) TOP TXT => ON/OFF

b) Fast TXT => ON/OFF

c) Teletext Language => Teletext Language may be controlled from this menu by service

user.

d) Txt Start RF

e) Txt Start Ext

f) Txt Start Mix

g) Menu Teletext Language => If ON, Teletext Language item is visible in Features Menu, and

Teletext Language can be controlled from Features Menu by normal user, else Teletext Language is invisible to normal user.

2.6. Tuner Options

a) Switch Low Band b) Switch Mid Band c) Switch High Band d) Boundry1 Low Byte e) Boundry1 High Byte f) Boundry2 Low Byte g) Boundry2 High Byte h) Control Byte

These values need to be filled in the factory acording to the tuner used on the chassis.

i) Store => OK to store; when the values are entered correctly OK needs to be pressed on this

item to store the values.

TFT TV Service Manual

3. SOFTWARE UPDATE DESCRIPTION

3.1. ANALOG SOFTWARE UPDATE via SCART

STEP.1

Enter service menu by pressing the buttons “MENU”,”4”,”7”,”4”,”5” respectively.

STEP.2

Select “OPTIONS” from the service menu and “ENTER FLASH MODE”

STEP.3

Connect the Software Update Tool (17tr15-3) to parellel port of your PC.

STEP.4

Connect scart-end of the cable to Scart-1 (Ext-1).

STEP.5

Connect other-end of cable to “PL 2” socket on the Update Tool (17tr15-3)

STEP.6

Run IAPWriter.exe.

STEP.7

Click “load file” and load the required software.

TFT TV Service Manual

3.2. ANALOG SOFTWARE UPDATE via I2C

STEP.1

Enter service menu by pressing the buttons “MENU”,”4”,”7”,”4”,”5” respectively.

STEP.2

Select “OPTIONS” from the service menu and “ENTER FLASH MODE”

STEP.3

Connect the Software Update Tool (17tr15-3) to parellel port of your PC.

STEP.4

Connect one-end of cable to “PL904” socket on the chassis socket MB15

STEP.5

Connect other-end of cable to “PL 2” socket on the Update Tool (17tr15-3)

STEP.6

Run IAPWriter.exe.

STEP.7

Click “load file” and load the required software.

TFT TV Service Manual

3.3. EEPROM UPDATE via SCART

STEP.1.

Insert the EEROM tool(TR16) to SCART-1

STEP.2.

Enter service menu by pressing the buttons “MENU”,”4”,”7”,”4”,”5” respectively

STEP.3.

Press “YELLOW” colour button on the remote controller. Then you will have two options

STEP.3.a

Press “RED” colour button to copy data of external EEPROM into internal one

STEP.3.b

Press “GREEN” colour button to copy data of internal EEPROM into external one

TFT TV Service Manual

4. INTRODUCTION

26”W TFT TV is a progressive TV control system with built-in de-interlacer and scaler. It uses a 1366x768 ( LG SLB2) panel with 16:9 aspect ratio.The TV is capable of operation in PAL, SECAM, NTSC (playback)

colour standards and multiple transmission standards as B/G, D/K, K’, I/I’, and L/L’ including German and NICAM stereo. Sound system output is supplying 2x8W (10%THD) for stereo 8ȍ speakers. The chassis isinputs equipped with many and outputs allowing it to be used as a center of a media system.

It supports following peripherals: 2 SCART sockets 1 AV input (CVBS + Stereo Audio)

1 SVHS input 1 Stereo Headphone input

1 Component input (YPbPr + Stereo Audio) 1 D-Sub 15 PC input

1 HDMI input 1 Stereo audio input for PC

1 Stereo audio output

5. TUNER

The tuners used in the design are combined VHF, UHF tuners suitable for CCIR systems B/G, K’, L, L’, I/I’, and D/K. The tuning is available through the digitally controlled I Tuners in use.

C bus (PLL). Below you will find info on one of the

General description of UV1316:

The UV1316 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range of applications. It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’. The low IF output

impedance has been designed for direct drive of a wide variety of SAW filters with sufficient suppression of triple transient.

Features of UV1316:

1. Member of the UV1300 family small sized UHF/VHF tuners

2. Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K

3. Digitally controlled (PLL) tuning via I

C-bus

4. Off-air channels, S-cable channels and Hyperband

5. World standardised mechanical dimensions and world standard pinning

6. Compact size

7. Complies to “CENELEC EN55020” and “EN55013”

Pinning:

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

2. Tuning voltage

3. I²C-bus address select : Max: 5.5V

4. I²C-bus serial clock : Min:-0.3V, Max: 5.5V

5. I²C-bus serial data : Min:-0.3V, Max: 5.5V

6. Not connected

7. PLL supply voltage : 5.0V, Min: 4.75V, Max: 5.5V

8. ADC input

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

10. Symmetrical IF output 1

11. Symmetrical IF output 2

6. IF PART (TDA9886)

The TDA9886 is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal PLL. The following figure shows the simplified block diagram of the integrated circuit. The integrated circuit comprises the following functional blocks: VIF amplifier, Tuner and VIF-AGC, VIF -AGC detector, Frequency Phase-Locked Loop (FPLL) detector, VCO and divider, Digital acquisition help and AFC, Video demodulator and amplifier, Sound carrier trap, SIF amplifier, SIF-AGC

TFT TV Service Manual

detector, Single reference QSS mixer, AM demodulator, FM demodulator and acquisition help, Audio amplifier and mute time constant,

I²C-bus transceivers and MAD (module address), Internal voltage stabilizer.

7. MULTI STANDARD SOUND PROCESSOR

The MSP34x0G family of single-chip Multistandard Sound Processors covers the sound processing of all analogue TVStandards worldwide, as well as the NICAM digital sound standards. The full TV sound processing, starting with analogue

sound IF signal-in, down to processed analogue AF-out, is performed on a single chip.

These TV sound processing ICs include versions for processing the multichannel television sound (MTS) signal conforming to the standard recommended by the Broadcast Television Systems Committee (BTSC). The DBX

noise reduction, or alternatively, Micronas Noise Reduction (MNR) is performed alignment free. Other processed standards are the Japanese FM-FM multiplex standard (EIA-J) and the FM Stereo Radio standard.

Current ICs have to perform adjustment procedures in order to achieve good stereo separation for BT SC and EIA-J. The MSP 34x1G has optimum stereo performance without any adjustments.

8. VIDEO SWITCH TEA6415

In case of three or more external sources are used, the video switch IC T EA6415 is used. The main function of this device is to switch 8 video-input sources on the 6 outputs.

Each output can be switched on only one of each input. On each input an alignment of the lowest level of the signal is made (bottom of sync. top for CVBS or black level for RGB signals).

Each nominal gain bet ween any input and output is 6.5dB.For D2MAC or Chroma signal the alignment is switched off by forcing, with an external resistor bridge, 5VDC on the input. E ach input can be used as a normal input or as a MAC or

Chroma input (with external Resistor Bridge). All the switching possibilities are changed through the BUS. Driving 75ohm load needs an exter nal resistor. It is possible to have the same input connected to several outputs.

9. AUDIO AMPLIFIER STAGE WITH TPA3004D2

The TPA3004D2 is a 12-W (per channel) efficient, Class-D audio amplifier for driving bridged-tied stereo speakers. The TPA3004D2 can drive stereo speakers as low as 4 7KHKLJKHIILFLHQF\RIWKH73$'HOLPLQDWHVWKHQHHGIRU

external heatsinks when playing music. Stereo speaker volume is controlled with a dc voltage applied to the volume control terminal offering a range of gain from –

40 dB to 36 dB. Line outputs, for driving external headphone amplifier inputs, are also dc voltage controlled with a range ofgainfrom–56dBto20dB.

An integrated 5-V regulated supply is provided for powering an external headphone amplifier.

TFT TV Service Manual

10. POWER SUPPLY (SMPS)

The DC voltages required at various parts of the chassis are provided by an SMPS transformer controlled by the IC MC44608, which is designed for driving, controlling and protecting switching transistor of SMPS. The transformer

generates 145V for FBT input, +/-14V for audio amplifier, 5V and 3.3V stand by voltage and 8V, 12V and 5V supplies for other d ifferent parts of the chassis.

An optocoupler is used to control the regulation of line voltage and stand-by power consumption. There is a regulation circuit i n secondary side. This circuit produces a control voltage according to the changes in 145V DC voltage, via an

optocoupler (TCET1102G) to pin3 of the IC.

During the switch on period of the transistor, energy is stored in the transformer. During the switch off period energy is fed to the load via secondary winding. By varying switch-on time of the power transistor, it controls

each portion of energy transferred to the second side such that the output voltage remains nearly independent of load variations.

11. MICROCONTROLLER

The Micronas SDA 55xx TV microcontroller is dedicated to 8 bit applications for TV control and provides dedicated graphic features designed for modern low class to mid range TV sets. The SDA 55xx provides also an integrated general purposefully 8051-compatible microcontroller with specific hardware features especially suitable in TV sets. The microcontroller core has been enhanced to provide powerful features such as memory banking, data pointers and additional interrupts, etc. The internal XRAM consists of up to 16 kBytes. The microcontroller provides an internal ROM of up to 128 kBytes. ROMless versions can access up to 1 MByte of external RAM and ROM. The 8-bit microcontroller runs at 33.33 MHz internal clock. SDA 55xx is realized in 0.25 micron technology with 2.5 V supply voltage for the core and 3.3 V for the I/O port pins to make them TTL compatible. Based on the SDA 55xx microcontroller the MINTS software package was developed and provides dedicated device drivers for many Micronas video & audio products and includes a full blown TV control SW for the PEPER application chassis. The SDA 55xx is also supported with powerful design tools like emulators from Hitex, Kleinhenz, iSystems, the Keil C51 Compiler and TEDIpro OSD development SW by Tara Systems.

12. SERIAL ACCESS CMOS 4Kx8(32KBit)EEPROM 24C32A

The Microchip Technology Inc. 24AA32A/24LC32A(24XX32A*) is a 32 Kbit Electrically Erasable PROM. The device is organized as four blocks of 8K x 8-bitmemory with a 2-wire serial interface. Low-voltage design permits operation down to 1.8V, with standby and active currents of only 1μA and 1mA, respectively. It has been developed for advanced, low-power applications such as personal communications or data acquisition. The 24XX32A also has a page write capability for up to 32 bytes of data. Functional address lines allow up to eight devices on the same bus, for up to 256Kbits address space.

13. CLASS AB STEREO HEADPHONE DRIVER TDA1308

The TDA1308 is an integrated class AB stereo headphone driver contained in a DIP8 plastic package. The deviceisfabricatedina1mmCMOSprocessandhasbeenprimarilydevelopedforportabledigitalaudio

applications.

14. SAW FILTERS

K9656M: Standard:

•B/G

• D/K

•I

• L/L’

Features

• TV IF audio filter with two channels

• Channel 1 (L’) with one pass band for sound carriers at 40.40 MHz (L’) and 39.75 MHz (L’- NICAM)

• Channel 2 (B/G, D/K, L, I) with one pass band for sound carriers between 32.35 MHz and 33.40 MHz

Terminals

• Tinned CuFe alloy

Pin configuration

1Input 2 Switching input

3 Chip carrier - ground 4Output

5Output

TFT TV Service Manual

K3958M:

Standard:

•B/G

• D/K

•I

• L/L’

Features

• TV IF video filter with Nyquist slopes at 33.90 MHz and 38.90 MHz

• Constant group delay

Terminals

Tinned CuFe alloy

Pin configuration

1Input 2 Input - ground 3 Chip carrier - ground 4 Output 5 Output

15. IC DESCRIPTIONS

TEA6415C 24LC02

24C32 74LVC14A

TEA6420D CS4334

GAL16LV8 K6R4008V1

KA278R33 LM1117 LM317T LM809 MSP3411G M29W040B MC33202 PCF8574 TSOP1836 PI5V330 SDA5550 SII9993 SN74CB3Q3305 ST24LC21 LM2576 MC34063 TDA1308 TDA9886T TPA3004D2 μPA672T VPC3230D MAD4868A SVP EX-59B

15.1. TEA6415C

15.1.1. General Description

The main function of the IC is to switch 8 video input sources on 6 outputs. Each output can be switched on only one of each input. On each input an alignment of the lowest level of the signal is made (bottom of synch. top for CVBS or black level for RGB signals). Each nominal gain between any input and output is 6.5dB. For D2MAC or

Chroma signal the alignment is switched off by forcing, with an external resistor bridge, 5 V

DC on the input. Each

input can be used as a normal input or as a MAC or Chroma input (with external resistor bridge). All the switching possibilities are changed through the BUS. Driving 75ORDGQHHGVDQH[WHUQDOWUDQVLVWRU,WLVSRVVLEOH

TFT TV Service Manual

to have the same input connected to several outputs. The starting configuration upon power on (power supply: 0 to 10V) is undetermined. In this case, 6 words of 16 bits are necessary to determine one configuration. In other

case, 1 word of 16 bits is necessary to determine one configuration.

15.1.2.

• 20MHz Bandwidth

• Cascadable with another TEA6415C (Internal address can be changed by pin 7 voltage)

• 8 Inputs (CVBS, RGB, MAC, CHROMA,...)

• 6 Outputs

• Possibility of MAC or chroma signal for each input by switching-off the clamp with an external resistor bridge

• Bus controlled

• 6.5dB gain between any input and output

• 55dB crosstalk at 5mHz

• Fully ESD protected

15.1.3.

1. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA

2. Data : Low level : -0.3V Max: 1.5V,

3. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA

4. Clock : Low level : -0.3V Max: 1.5V,

5. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA

6. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA

7. Prog

8. Input : Max : 2Vpp, Input Current: 1mA, Max: 3mA

9. Vcc : 12V

10. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA

11. Input : Max : 2Vpp, Input Current: 1mA, Max : 3mA

12. Ground

13. Output : 5.5Vpp, Min : 4.5Vpp

14. Output : 5.5Vpp, Min : 4.5Vpp

15. Output : 5.5Vpp, Min : 4.5Vpp

16. Output : 5.5Vpp, Min : 4.5Vpp

17. Output : 5.5Vpp, Min : 4.5Vpp

18. Output : 5.5Vpp, Min : 4.5Vpp

19. Ground

20. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA

Features

Pinning

High level : 3.0V Max : Vcc+0.5V

TFT TV Service Manual

15.2. 24LC02

15.2.1. Description

The Microchip Technology Inc. 24AA02/24LC02B (24XX02*) is a 2 Kbit Electrically Erasable PROM. The device is organized as one block of 256 x 8-bit memory with a 2-wire serial interface. Low -voltage design permits

operation down to 1.8V, with standby and active currents of only 1μA and 1mA, respectively. The 24XX02 also has a page write capability for up to 8 bytes of data.

15.2.2.

• Single supply with operation down to 1.8V

• Low-power CMOS technology

-1mA active current typical

-1μA standby current typical (I-temp)

• Organized as 1 block of 256 bytes (1 x 256 x 8)

• 2-wire serial interface bus, I

• Schmitt Trigger inputs for noise suppression

• Output slope control to eliminate ground bounce

• 100 kHz (24AA02) and 400 kHz (24LC02B) compatibility

• Self-timed write cycle (including auto-erase)

• Page write buffer for up to 8 bytes

• 2ms typical write cycle time for page write

• Hardware write-protect for entire memory

• Can be operated as a serial ROM

• Factory programming (QTP) available

• ESD protection > 4,000V

• 1,000,000 erase/write cycles

• Data retention > 200 years

• 8-lead PDIP, SOIC, TSSOP and MSOP packages

• 5-lead SOT-23 package

• Pb-free finish available

• Available for extended temperature ranges:

-Industrial (I): -40°C to +85°C

-Automotive (E): -40°C to +125°C

Features

C compatible

15.2.3.

Pinning

TFT TV Service Manual

15.3. 24C32

15.3.1. General Description

The Microchip Technology Inc. 24C32 is a 4K x 8 (32K bit) Serial Electrically Erasable PROM. This device has been developed for advanced, low power applications such as personal communications or data acquisition.

The 24C32 features an input cache for fast write loads with a capacity of eight 8-byte pages, or 64 bytes. It also features a fixed 4K-bit block of ultra-high endurance memory for data that changes frequently. The 24C32 is

capable of both random and sequential reads up to the 32K boundary. Functional address lines allow up to 8 24C32 devices on the same bus, for up to 256K bits address space. Advanced CMOS technology makes this

device ideal for low-power non-volatile code and data applications.

15.3.2.

• Voltage operating range: 4.5V to 5.5V

- Peak write current 3 mA at 5.5V

- Maximum read current 150μA at 5.5V

- Standby current 1μA typical

• Industry standard two-wire bus protocol, I

-Including 100 kHz and 400 kHz modes

• Self-timed write cycle (including auto-erase)

• Power on/off data protection circuitry

• Endurance:

- 10,000,000 Erase/Write cycles guaranteed for High Endurance Block

- 10,000,000 E/W cycles guaranteed for Standard Endurance Block

• 8 byte page, or byte modes available

• 1 page x 8 line input cache (64 bytes) for fast write loads

• Schmitt trigger, filtered inputs for noise suppression

• Output slope control to eliminate ground bounce

• 2 ms typical write cycle time, byte or page

• Up to 8 chips may be connected to the same bus for up to 256K bits total memory

• Electrostatic discharge protection > 4000V

• Data retention > 200 years

• Temperature ranges:

-Commercial (C): 0°C to +70°C

-Industrial (I): -40°C to +85°C

15.3.3.

Features

Pinning

C compatible

TFT TV Service Manual

15.3.4.

PIN DESCRIPTIONS A0, A1, A2 Chip Address Inputs

The A0...A2 inputs are used by the 24C32 for multiple device operation and conform to the two-wire bus standard. The levels applied to these pins define the address block occupied by the device in the address map. A

particular device is selected by transmitting the corresponding bits (A2, A1, and A0) in the control byte.

SDA Serial Address/Data Input/Outpu

This is a bidirectional pin used to transfer addresses and data into and data out of the device. It is an open drain terminal; therefore the SDA bus requires a pull-up resistor to VCC (typical 10KQ for 100 kHz, 1KQ for 400 kHz).

For normal data transfer SDA is allowed to change only during SCL low. Changes during SCL high are reserved for indicating the START and STOP conditions.

SCL Serial Clock

This input is used to synchronize the data transfer from and to the device.

PIN Function Table

15.4. 74LVC14A

15.4.1. Description

The 74LVC14A is a high-performance, low-power, low-voltage, Si-gate CMOS device, superior to most advanced CMOS compatible TTL families. Inputs can be driven from either 3.3 or 5V devices. This feature allows the use of these devices as translators in a mixed 3.3 and 5V environment. The 74LVC14A provides six inverting buffers with Schmitt-trigger action. It is capable of transforming slowly changing input signals into sharply defined, jitter-free output signals.

15.4.2. Features

• Wide supply voltage range from 1.2 to 3.6 V

• CMOS low power consumption

• Direct interface with TTL levels

• Inputs accept voltages up to 5.5 V

• Complies with JEDEC standard no.8-1A

• ESD protection:

HBM EIA/JESD22-A114-A exceeds 2000V MM EIA/JESD22-A115-A exceeds 200V.

• Specified from -40 to +85C and -40 to +125C.

15.4.3. Pinning

TFT TV Service Manual

15.5. TEA6420

15.5.1. Features

• 5 Stereo Inputs

• 4 Stereo Outputs

• Gain Control 0/2/4/6dB/Mute for each Output

• Cascadable (2 different addresses)

• Serial Bus Controlled

•VerylowNoise

• Very low Distortion

15.5.2.

The TEA6420 switches 5 stereo audio inputs on4stereo outputs. All the switching possibilities are changed through the I

15.5.3.

Description

C bus.

Pin Connections

15.6. CS4334

15.6.1. Features

• Complete Stereo DAC System: Interpolation, D/A, Output Analog Filtering

• 24-Bit Conversion

TFT TV Service Manual

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