Philips DVD763SA/051 Control and Display, Standby LED, Key Matrix, IR Receiver, P50 Interface

Page 59

EN 74

 

9.

 

DVD763SA

Circuit Descriptions and List of Abbreviations

9.5Control and Display

9.5.1Control

The key component on this board is the (slave) microprocessor (item 7101). It runs on an 8 MHz system clock generated with a ceramic resonator (item 1128) and has a reset circuit that is triggered by the +5VSTBY voltage.

After the RESET pulse (active LOW), the STB_CTRL line (pin 21, item 7101) will release the reset of the host uP (on the mono board) via the switched 3V3 supply. See circuit around item 7409 on mono board (diagram M4).

Other slave processor functions are:

•Generation of a scanning grid for the keys.

•Generation of the display grid and segment scanning.

•Generation of a square signal to generate the filament voltage for FTD display.

•Input for RC5/6 remote control protocol. The logic is HIGH > 4.5V and LOW < 0.3V.

Standby LED

Transistor 7105 drives the Standby LED. When the STBY_LED signal from the slave processor is ‘high’, the LED is ‘off’.

Key Matrix

When a key on the local keyboard is pressed, the signal at the scanning pins of the microprocessor (pins 26 to 37) goes from +5V to 0V.

IR Receiver

The IR controller in the slave processor handles both RC5 and RC6 signals. The logic is +5V for ‘high’ and 0V for ‘low' (measure at pin 22).

P50 Interface

P50 (or Easylink) is a bi-directional serial interface for communication between video equipment. This communication goes via pin 10 of the SCART-bus.

1.The required IC voltage is the +5VSTBY, which is present during Standby Mode.

2.When the RESET circuit (item 7102) is triggered by the +5VSTBY, the slave uP initialises.

3.This will set the STDBY_CTRL signal to LOW, which will switch on the +3V3 and +5V.

4.Once these voltages are provided, the host uP (on the mono board) will reset.

5.Now, the host uP will initialise, and indicate the slave uP to activate the Standby Mode (STBY_CTRL) signal.

6.The player wakes up from the Standby Mode when any button is pressed on the front panel, or when the 'Power' button is pressed on the Remote Control.

Note: The slave uP will not reset successfully, if the 8MHz clock oscillator has not stabilised (check on pin 8 of IC7101).

9.5.2Display

The slave uP provides a negative DC switching voltage, to drive the 11-segment FTD. As the display consists of eleven segments, there are eleven grid signals (G1-G11) controlling each respective grid.

The slave processor has an internal square signal generator (42 kHz with duty cycle 45/55), to generate the AC filament voltage. TS7103 and 7106 amplify the square signal before it is applied to the display (VAC= VFIL_1 - VFIL_2, VRMS ≈ 3.5 V). The necessary power supply of -26 V is derived (via zener diode 6101) from the -32V supply, which is coming directly from the Switching Mode Power Supply (SMPS).

STDBYON

FRONT STDBY

(1 x Tact Switch)

*STDBY_CTRL LED

 

* For DVD763SA models

IR

A/V BOARD

SIO CLK

SIO DATA

STDBY CTRL

 

TMP87CH74 slave uP

GRID

SEGMENT

SIO_CLK

SIO_DATA

OTHERS

OPENCLOSE

STOP

PLAYPAUSE

STi55xx

HOST

FRONT CTRL

(Tact Switch)

FTD

CL 26532053_060.eps 160502

Figure 9-12 Slave processor interface

The block diagram above, illustrates the interfaces of the slave uP. The start-up sequence is as follows:

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Contents DVD763SA /001 /021 /051 ContentsDVD-Video Player Technical Specifications and Connection Facilities SpecificationsDolby Safety Instructions, Warnings and NotesSafety Instructions Laser Device UnitComPair Service HintsSwitched Mode Power Supply Service PositionsLift module up slightly and move MechanicalTopCover 300 Remove 4 screws 310 DVD Module 145 Remove flex connections to A/V boardMechanical- and Dismantling Instructions Purpose of Dealer Script Diagnostic Software, Trouble Shooting and Test InstructionsNucleus Contents of Dealer Script DealerscriptStructure of Player Script Contents of Player ScriptPlayer Script Purpose of Player ScriptLED Test Remote Control TestDisplay PCB Display Test5 P50 Loop-Back Test 162037.epsSound 1 & Scart DVD Test Picture Test Sound 2 TestBasic Engine Loop Test See Table Below Error BitsSSM Error Codes Uart Error CodesBe Errors Slph Error CodesCL 26532053056.eps SMA Error CodesReprogramming of New Mono Boards Set-up Physical Interface Components Hardware required Menu and Command Mode InterfaceCommand Overview of Nuclei Audio Ref. # Reference Name Remark Basic diagnostic nuclei Ref. # Reference Name RemarkProcessor and peripherals Ref. # Reference Name Remark Components Ref. # Reference Name RemarkMiscellaneous Ref. # Reference Name Remark Log Error logging in Nvram Ref. # Reference Name RemarkVideo Ref. # Reference Name Remark Display slave processor Ref. # Reference Name RemarkFirst Level Submenus Layout of Menu and SubmenuActivation MenusThird Level Submenus Second Level SubmenusAudio Nuclei Error Code Error text Nuclei Error CodesError Code Error text Basic Engine Nuclei Error Code Error text Processor & Peripherals Nuclei Error Code Error text Display PWB Nuclei Error Code Error textFurore Nuclei Error Code Error text Log Nuclei Error Code Error textMiscellaneous Nuclei Error Code Error text Video Nuclei Error Code Error textAudio Mute Check Test Instruction Front Display and Audio/ Video BoardSupply Check Clock CheckDigital Silence Command Ref.# Name Remarks Audio outputCommand Ref.# Name Remarks Killlr signal Kill CircuitPersonal Notes Block Diagram DVD763SA EU Block and Wiring DiagramWiring Diagram DVD763SA EU 170502 AV Board Testpoint OverviewCL 26532053011.eps Power Supply Unit DVD763SA EU Electrical DiagramsAV-Board Clock & Control 10ms / div AV-Board Video DACI200 I201 I221 200mV / div ACAV-Board Audio I421 I422 I423 I480 AV-Board VideoI231 I234 I403 I406 I407260402 Layout AV-Board Overview Top SideCL 26532053009.eps Layout AV-Board Part 1 Top Side Layout AV-Board Part 2 Top Side CL 26532053010.eps Layout AV-Board Overview Bottom SidePart CL 2653205310a.eps Layout AV-Board Part 1 Bottom SideCL 2653205310b.eps Layout AV-Board Part 2 Bottom SideDVD763SA 30521-Front Board Display Panel 200302 Layout DVD763SA 30521-Front Board Top SideLayout DVD763SA 30521-Front Board Overview Bottom Side CL 26532039021.eps210302 Layout DVD763SA 30521-Front Board Part 1 Bottom SideCL 2653203921a.eps CL 2653203921b.eps Layout DVD763SA 30521-Front Board Part 2 Bottom Side1200 1201 1202 6200 DVD763SA 30521-Front Board Standby PanelLayout DVD763SA 30521-Front Board Standby Panel 6200 1202 1200 1201Switching Panel 500mV/div AC Scart PanelTP1A Bvid out TP2A Gvid out TP14 Cvbs outLayout Scart Board Overview Top Side Layout Scart Board Part 1 Top Side Layout Scart Board Part 2 Top Side Introduction Power Supply UnitAlignments Circuit Descriptions and List of AbbreviationsOver-voltage Protection Loader/Mono BoardPrimary Current Sensing Under-voltage ProtectionDVD Back-end Processor Loader InterfaceServo Processor/Decoder Interface/Program MemoryAudio data input/output Interface Sacd DSD processorBasic Engine Interface Video Output Audio OutputMiscellaneous Power Supply diagram M7Clock Factory Audio/Video A/V Board Reset CircuitIR Receiver Control and DisplayStandby LED Key MatrixAbbreviation list TY72011P2 Pinning item Diagram Power Supply TY72011P2 Block Diagram itemIC Data Various Spare Parts ListVarious SD 4.00SACH ModuleRC22H RST SM Front PWBScart PWB

DVD763SA/051, DVD763SA/021, DVD763SA/001 specifications

The Philips DVD763SA series, which includes models DVD763SA/001, DVD763SA/021, and DVD763SA/051, represents a sophisticated blend of technology and quality in the realm of home entertainment. These DVD players are designed to deliver an exceptional viewing experience, featuring a range of functionalities that cater to modern media consumption needs.

One of the standout features of the DVD763SA series is its compatibility with various disc formats. It supports not just standard DVDs, but also CD-R/RW, MP3, and JPEG formats, allowing users to enjoy a versatile selection of media. This versatility ensures that whether you're in the mood for a classic movie, listening to music, or viewing photos from a digital camera, the Philips DVD763SA delivers seamless playback.

Equipped with progressive scan technology, these DVD players enhance video quality significantly. This technology minimizes motion blur and improves image clarity, producing a sharper picture that enhances the viewing experience, especially on larger screens. The DVD763SA series also boasts an advanced video rendering capability, which ensures that even older discs are upscaled to near-HD quality, providing a more enjoyable viewing experience.

Another notable characteristic of the DVD763SA series is its user-friendly interface. The remote control is ergonomically designed for ease of use, incorporating intuitive buttons that allow for quick access to settings, playback options, and media navigation. The on-screen display further simplifies navigation, making it easy for users to browse through their media collections.

Audio quality is equally impressive, with support for Dolby Digital and DTS sound formats. This ensures that viewers can enjoy cinematic audio experiences from the comfort of their homes. The players also feature direct audio outputs, enabling users to connect them to external sound systems for enhanced sound performance.

The Philips DVD763SA series prioritizes energy efficiency, adhering to environmentally friendly standards. This not only helps reduce power consumption but also contributes to lower electricity bills for households. With a sleek and compact design, these DVD players fit seamlessly into any home entertainment setup, providing both functionality and style.

In summary, the Philips DVD763SA/001, DVD763SA/021, and DVD763SA/051 models combine advanced technology with practical features, making them an excellent choice for anyone looking to upgrade their home media experience. From impressive audio-visual capabilities to user-friendly design, these players are well-equipped to meet the demands of today's media consumers.
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