HITACHI 15LD2550B, 15LD2550EB Diagram

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.

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.

No. 0238

15LD2550B 15LD2550EB

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

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

VORSICHT:

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

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

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

Colour Television

November 2007

TABLE OF CONTENTS

1. INTRODUCTION 3

1.1. Purpose 3

1.2. Scope 3

1.3. General Features 3

2. GENERAL DESCRIPTION 6

2.1. Introduction 6

2.2. System Building Blocks 6

2.2.1. Analog Front End 6

2.2.2. Back End 6

2.2.3. General Block Diagram 7

2.2.4. Side Board(s) 8

2.3. Power Management 11

3. APPENDIX 13

3.1. Definitions, Acronyms and Abbreviations 13

3.2. Basic Components 17

3.2.1. VCTI 17

3.2.2. TSU 3XAWL 20

3.2.3. 74HC4052 22

3.2.4. 74HC4053 23

3.2.5. TDA2822M 23

3.2.6. LM1117 24

3.2.7. KA78L08

3.2.8. IRF7314 25

3.2.9. NTGS 3446 25

3.2.10. FDC642P 26

3.3. Board Connectors, Headers & Jumpers 26

3.3.1. Scart Connector1 27

3.3.2. PC Connector- 27

3.3.3. DVB Connector 28

3.3.4. Side A/V Connector 28

3.3.5. IDTV_IF Connector 29

3.3.6. Led Connector without MECH SW 29

3.3.7. Led Connector with MECH SW 29

3.3.8. Keypad Connector 29

3.3.9. MSTAR Debug Connector 29

3.3.10. Flash Prog. And VCTI Debug Connector 30

3.3.11. LVDS Panel Connector 30

3.3.12. Speaker Right Audio Out 30

3.3.13. Speaker Left Audio Out 30

3.3.14. Side Headphone Connector 31

1. Introduction

1.1. Purpose

The purpose of this document is to define the DHDS and the operation of 17MB21, 15”XGA with LVDS input, 19” SXGA with double LVDS input. It is aimed to provide information to engineering staff to understand the operation and specs of the TV. The other related technical documents are as follows:

Title:

1 17MB21 Schematics 2 IR Receiver and Led Display Board Schematics 3 Keypad Board Schematics 5 VCTI49xy Datasheet –( Video-Controller-Text-IF-Audio IC) 6 TSU33AWL for 15”XGA TSU36AWL for SXGA Datasheet –( Controller

with Analog Interface and Multi-Purpose Output Transmitter)

7 Other ICs Datasheets (Please check the table in Appendix 3.2 for the

complete component list.).

Table : Related documents.

1.2. Scope

The document covers detailed descriptions of 17MB21 chassis system building blocks.

1.3. General Features

General product specifications and overview of the system will be introduced in this part. The system is a low end; 15” and 19” TFT LCD TV solution basically for EU market with VCTI49XYI and TSU33AWL or TSU36AWL Video Image Processor chip-set on single-layer PCB. As the first target market is EU, the first release of the TV will support PAL/SECAM B/G/D/K/I/L/L’.

The other general default features of the TV are as listed below:

 IR Control (RC5 and other customer specific protocols)  OSD  100 Program Storage Locations  Teletext  No Ident Timer  Screen Size (15”, 19”)  Child Lock  Sleep Timer  170/270V AC Plug  ST-BY Power Consumption <1W  1 Scart input (1  S-VHS Input , BAV input  75 ohms antenna input  PC Input (VGA)  2H/4H Comb Filter

Full)

Sound Features

 Equalizer  FM Radio  Linear Stereo  German-NICAM Stereo  5

Band Equalizer Control

 SRS TRU Surround (OPT)  SRS TRU Bass (OPT)  BBE, WOW (OPT)  Stereo Audio Output Power (2x2W )  16R speaker  Volume Controlled HP Output, Stereo Audio line out, Stereo Audio line in  Coaxial Audio Output (with IDTV or DVD Option)  Detachable Headphone Output (OPT)

Picture

 4:3 PANEL --- 4:3, 16:9, Auto  Picture Modes (

Bright, Standard, Soft)

 Media Window Enhancement (MWE)  White balance settings (warm/normal/cool) for TV&PC  Auto Shut down  Multi System Reception : PAL-SECAM BG-DK-I/I’-L/L’  NTSC Video Playback  WSS (16:9 / 4:3 Aspect Ratio Auto Switch)  Channel Type Sorting (Favorite/Sport/Music/News/Movie)

Tuning

 FST  Frequency Search (OPT)  APS (Auto Search / Name / Sort)  Auto Search  CATV / HYPERBAND

Keyboard

 Volume -/ +Button  Program -/+ Button  Menu Button  TV / AV Button  Teletext/OSD  Simple Text 10 Pages  Fastext & Top Text (OPT)  Teletext Languages (ALL)  Character Based OSD  OSD Color & Transparency Selection

The general optional features of the system are as listed below:

 AV Input  Y/Pb/Pr support via VGA connector  Full Green Mode DPMS Support  Plug & Play (DDC2Bi) For Windows 9X, ME, 2000, XP (OPT)  Headphone {side || on board} (When the headphone is used, TV volume cut off  IDTV With Single CI Connector (OPT)  DVD (OPT)  Comb Filter (OPT)  LTI, CTI (OPT)  IDTV  OSD: 22 Menu Languages ENG, FRA, GER, ITA, SPA, POR, TUR, SWE, DEN, FIN, NOR, POL,

HUN, CZE, BUL, ROM, RUS, DUTCH, CRO, SLOVAK, SLOVENIAN and GRE.

 2x2W Speaker Output Power.

automatically)

2. General Description

2.1. Introduction

This chapter describes system building blocks in detail.

2.2. System Building Blocks

17MB21 chassis main blocks are as follows:

 Analog Front End : VCTI (Microcontroller + Video Proccessor + Sound Proccessor + IF+

Keyboard/IR Interface+OSD), Audio Amp.

 Back End : TSU33AWL or TSU36AWL (Scaler, Deinterlacer, OSD generator, LVDS

transmitter)

 Side Board(s) : Keyboards, IR/LED Boards, FAV Boards, Headphone Boards.

2.2.1. Analog Front End

17MB21 Main Board consists of two major blocks. The first block is analog front-end and this block is handled by VCTI chip that is highly multifunctional. This IC does demodulation of Video & Audio from Tuner IF, CVBS, Audio, RGB, SVHS input selection and processing. It has an audio processor that supports equalizer or tone control, volume control, AVL, surround effect etc and supplies amplifier, headphone and CVBS & audio line outputs. It handles video processing such as colour standard detection and demodulation, picture alignment (brightness, contrast, colour etc.). The IC also does teletext decoding with fastext memory. After video processing, the processed video is applied to TSU3XAWL chip in RGB format.

The TV Tuner is an asymmetrical or a symmetrical IF output type and is PLL controlled. The IF signal is applied single saw filter. After the SAW filter block, IF signal is applied to VCTI IF inputs (Pin 16 and 17).

As VCTI can handle all the audio processing, there is no need for additional audio processor solution on the board. VCTI supports three Audio outputs. These outputs are assigned to Line-out,Speaker and SC1 audio out. The board employs TDA2822M to drive speakers and headphone.

2.2.2. Back End

The Back End section is handled by TSU chip. The RGB input can handle standard interlaced RGB output from VCTI, PC VGA RGB input and YPbPr. There are two set of ADC is present in TSU which are assigned to YPbPr/VGA and VCTI RGB output sources.

TSU33AL chip have an integrated 6/8-bit LVDS transmitter. Backlight dimming and Panel power supply On/Off control is achieved via TSU chip. There are two

pins to control inverter one of them is used for adjusting backlight the other one is used for backlight on/off control. Backlight on/off control is performed by VCTI.

2.2.3. General Block Diagram

Figure 1

2.2.4. Side Board(s)

2.2.4.1. Side Audio Video

Front Audio Video board (17FAV20) for 17MB21 main board is detailed in the Table below.

Connector Name

JK100

JK101 RCA Jack Yellow Side CVBS Input

JK102 RCA Jack Red Side Audio Input Right

JK103 RCA Jack White Side Audio Input Left

JK104 Headphone Jack Side Headphone

PL100 Connector Header 8P Connector 8P for SVHS

PL103 Connector Male 5P Connector 5P for HP

PL101 Connector Male 5P

Type Function

SVHS Jack 4P DIN Type

Side SVHS Input

Connector 5P for CVBS, Audio R and L

2.2.4.2. Keypads

The keypads button descriptions for 17MB21 main board are listed in the Table below.

Key Name Type Function Power* Soft sw. Power shut-down and turn on Stand-by* Tact sw. Switch between stand-by and turn on

modes. TV/AV Tact sw. Input source select button. Menu Tact sw. Display main menu on the screen. If any

menu is active, display the upper menu. If

main menu is active, turn menu off. Program- Tact sw. Go to the lower program at any time in TV

mode. (Scroll key function in menu mode) Program+ Tact sw. Go to the upper program at any time in TV

mode. (Scroll key function in menu mode) Volume- Tact sw. Decrease the volume level in the volume.

(Scroll key function in menu mode) Volume+ Tact sw. Increase the volume level in the volume.

(Scroll key function in menu mode)

*In any T.V. set only one of them can be used.

Connector PL1 on keypads (connected to the connector PL303 on the main board):

Pin No: Name 1 Gnd 2 AV Tact SW 3 Soft SW/Tact SW 4 Program and

Volume SW

2.2.4.3. IR&Led Board

IR&LED board contains LED indicator(s) to show TV’s status (For 1510/11 cabinet led colors are: Red for stand-by, green for normal operation) and one IR receiver to get remote control instructions. All the IR&LED boards have the same circuit and connector pinning but the different mechanical structure to fit different cabinets For 1510/11 cabinet 17LD12-3 boards are used.

17LD12-3 Schematics

2.3. Power Management

All power requirements supplied from LIPS (Light Integrated Power Supply) Boards. IPS01 Lips Board used for 15” products and IPS02 for 19” products. (Please check the

Table below for power management details.)

Table : Power management table.

PL600 socket is used for power connections.

17IPS01 Outputs

Voltage Current

+33V 5mA +12V_Unregulated 1000mA +12V 700mA +5V 300mA +3V3 1600mA +1V8 400mA +560V_AC 15mA

Figure 3: IPS01 Block Diagram

3. APPENDIX

3.1. Definitions, Acronyms and Abbreviations

2CS Dual Carrier Stereo a.k.a. German Stereo. ACI Automatic Channel Installation, ACL Automatic Colour Limiting ADC Analogue to Digital Converter AF Audio Frequency AFC Automatic Frequency Control AGC Automatic Gain Control AKB Auto Kine Biasing API Application Programmers Interface. ASD Automatic Standard Detection ASP Audio Signal Processor (on Picasso) ATS Automatic Tuning System, AV External Audio and Video TV peripheral. AVC Audio Video Control AVL Automatic Volume Leveling BBE Bass enhancement licensed by BBE Inc. BE Back-End BKS BlacK Stretch BTSC Broadcast Television Systems Committee USA standard CC Closed Captioning. CCC Continuous Cathode Calibration CE Configuration Element CLUT Colour Look Up Table COR Contrast Reduction CVBS Combined Video, Blanking and Sync. DAC Digital to Analogue Converter DBE Dynamic Bass Enhancement DDEP DEMDEC Easy Programming; operation mode of DEMDEC. DEMDEC Stereo demodulator decoder; part of ASP. DPL Dolby Pro Logic DPTR Data PoinTeR DRCS Dynamically Redefinable Character Set. DSP Digital Signal Processor (or Processing) DUB Dynamic Ultra Bass EPG Electronic Program Guide. FA Factory mode FASTEXT Special way of accessing teletext pages FB Fast Blanking FE Front End FLOF Full Level One Features (synonym for Fastext) FST Frequency Synthesis Tuning

GTV Global TeleVision. HP Headphone HSH Horizontal Shift IF Intermediate Frequency. Normally the output of the tuner. IIC Inter Integrated Circuit IIS Inter Integrated Sound LibCoMa Library Configuration Manager. LS Loudspeaker MIPS Million Instructions Per Second MPX Japanese multiplexed sound standard MS Multi Standard NICAM Near Instantaneously Compacted Audio Multiplex NTSC National Television System Committee. Colour encoding system. NVM Non-Volatile Memory OSD On Screen Display OSRP Overall System Realization Process OTP One Time Programmable PAL Phase Alternating LineColour encoding system. PAT Painter Authoring Tool. Development support tool to define Painter

character sets (and UIMS data structures). PB Picture Booster PIP Picture In Picture PLL Phase Locked Loop PMT Power ManagemenT PP Personal Preferences PS-MTS Mainstream Television Solutions PSW Program Status Word PWM Pulse Width Modulation RC-5 Remote Control system RCP Remote Control Preprocessor RF Radio Frequency TV signal broadcast. RGB Red, Green Blue. The colour signals. Round-robin A style of scheduling where each task is executed in turn, provided it is ready

to run. RPMS Resource Persistent Memory Store RTC Real Time Clock SAP Second Audio Program; part of BTSC sound system. SAW Surface Acoustic Wave SCART External CVBS, S-VHS and Sound input/output, RGB and switching input. SCI Software Configuration Item SCL Serial Clock SDA Serial Data SDE Software Development Environment SECAM Sequentiel a Memoire Colour encoding system. Set-maker The manufacturer/developer of the end product. SFR Special Function Register. SHLD Software High Level Design SIF Sound Intermediate Frequency SRT Signal RouTing SS Source Switching SSS Static Standard Selection

State The condition of a component that results in a particular observable

behaviour. Status Handler A step that handles a status change, by managing the response to the

change. STB SetTop Box TOP(TEXT) Table Of Pages, Special way of accessing teletext pages TXT Teletext UHF Ultra High Frequency UI User Interface UIMS User Interface Management System UOC Ultimate One Chip User See Set-maker VDS Virtual Dolby Surround VG2 Voltage at Gate 2 VHF Very High Frequency VIF Video Intermediate Frequency VOD Video On Demand VPS Video Programming delivery control System VS Vertical Slope VSH Vertical Shift VSP Video Signal Processor (on Cosmic) VST Voltage Synthesis Tuning Y/C Luminance/Chroma signal, S-VHS YprPb Luminance Y and colour difference signals (Pr - red, Pb - blue, colour bar

100% saturation) YUV Luminance (Y) and colour difference signals (U and V).

Audio Preset: Pre-defined audio reproduction settings stored in NVM. The values of the

items in a Preset can be set in service.

SCAVEM: SCAn VElocity Modulation User 1: User defined setting for height of a 16:9 picture setting User 2: User defined setting for the zoom and the scroll of a 16:9 picture setting Indicator: An on screen object, giving textual or graphical information on user

commands or system events

NVM: Non Volatile Memory, used to store user and service/factory settings Program: A broadcasted TV signal received via the tuner. A program can be identified

by the frequency by which it is transmitted. Source: The selected input of the TV receiver. This can either be a the front end (i.e. a

program) or an external AV source Video Preset: Pre-defined video reproduction settings stored in NVM. The values of the

items in a Preset can be set in service. White tone: Pre-defined values for the white point RED, GREEN and BLUE settings. The

values of the white point settings for each white tine setting can be set in

service.

Hue: Tint First/last program: 0-99 for 100 programs available Available program: First available program is the lowest program number in NVM that is

marked as

program number is used. Last available program is the highest program

number in NVM, which is marked as

are skipped then the highest program number is used.

not skipped

. When all programs are skipped then the lowest

not skipped

. When all program numbers

+ 35 hidden pages