Grundig CUC 2003 H Service Manual [en, de]

TV Service Manual

2. Ergänzung / Supplement 2

CUC 2003 H

T 55 – 830 Multi/COM

GCL5272 / VNM

Zusätzlich erforderliche Unterlagen für den Komplettservice Additionally required Service Documents for the Complete Service

Service Manual

CUC 2003

CUC 2003 H

Materialnr./Part No.

720100240000

Materialnummer/Part Number 720100240200 Änderungen vorbehalten/Subject to alteration • Printed in Germany HD E-BS-SA 12 0301 http://www.grundig.com

Ergänzung Supplement

Materialnr./Part No.

720100240100

Service Manual

Sicherheit

Safety

Materialnr./Part No.

720108000000

Service

Training

CUC 2000

Materialnr./Part No.

Ķ 720103503500 ķ 720103503600

Grundig Service

Hotline Deutschland...

Technik:

TV TV SAT VCR/LiveCam HiFi/Audio Car Audio Telekommunikation

Planatron

Ersatzteil-Verkauf: ...Mo.-Fr. 8.00-19.00 Uhr

(8.00-22.00 Uhr)

...Mo.-Fr. 8.00-18.00 Uhr

Fax:

Telefon: Fax:

0180/52318-41 0180/52318-49 0180/52318-48 0180/52318-42 0180/52318-43 0180/52318-44 0180/52318-45 0180/52318-51

0180/52318-99

0180/52318-40 0180/52318-50

Allgemeiner Teil / General Section CUC 2003 H

Es gelten die Vorschriften und Sicherheitshinweise gemäß dem Service Manual "Sicherheit", Materialnummer 720108000000, sowie zusätzlich die eventuell abweichenden, landesspezifischen Vorschriften!

Für die auf der Titelseite aufgeführten Chassis gilt das Service Manual CUC 2003 / 2003 H. Diese Ergänzung dokumentiert die Unterschiede bzw. zusätzlichen Bestückungen der Geräte.

Grundlage für den Service sind:

–Service Manual CUC 2003 / 2003 H (Materialnummer 720100240000) – 1. Ergänzung CUC 2003 / 2003 H (Materialnummer 720100240100) –Service Manual "Sicherheit" (Materialnummer 720108000000)

Inhaltsverzeichnis

The regulations and safety instructions shall be valid as provided by the "Safety" Service Manual, part number 720108000000, as well as the respective national deviations.

The Service Manual CUC 2003 / 2003 H applies to the chassis specified on the front page. This Manual describes the differences and the additionally fitted components of the TV receivers.

Basic instructions for servicing are given in the:

–Service Manual CUC 2003 / 2003 H (Part number 720100240000) –1st Supplement CUC 2003 / 2003 H (Part number 720100240100) –Service Manual “Safety” (Part number 720108000000)

Table of Contents

Seite

Hinweise ......................................................................................... 2

Modulauflistung – Service Manual mit Ergänzungen ...................... 3

Modulübersicht ................................................................................ 3

Technische Daten ........................................................................... 4

Beschreibung (COM Modul) nur in Englisch ................................... 5

Kabelverlegung nach VDE ............................................................ 12

Netzteil .......................................................................................... 13

LS-Buchsenplatte .......................................................................... 13

COM Modul ................................................................................... 14

•Blockschaltplan ........................................................................ 14

•Mikrocomputer ......................................................................... 15

•Mega Text ................................................................................ 16

•Modulator FSK ......................................................................... 17

•Diplexer-Schaltung ................................................................... 18

•Stromversorgung ..................................................................... 19

Leiterplatte Multi/Com ................................................................... 20

Ersatzteillisten ............................................................................... 21

Hinweise

Vor dem Öffnen des Gehäuses zuerst den Netzstecker ziehen! Leitungsverlegung

Bevor Sie die Leitungen und insbesondere die Masseleitungen lösen, muss die Leitungsverlegung zu den einzelnen Baugruppen wie z.B. Chassis, Netzschalterplatte, Bedieneinheit, Bildrohrplatte, Ablenkeinheit, Lautsprecher usw. beachtet werden. Nach erfolgter Reparatur ist es notwendig, die Leitungsführung wieder in den werkseitigen Zustand zu versetzen um eventuell spätere Ausfälle oder Störungen zu vermeiden.

Netzkabel

Diese Geräte dürfen nur mit dem Original-Netzanschlusskabel mit integrierter Entstördrossel betrieben werden. Dieses Netzkabel verhindert Störungen aus dem Netz und ist Bestandteil der Geräte- zulassung. Im Ersatzfall bestellen Sie bitte ausschließlich das Netzkabel laut Ersatzteilliste.

Page

Notes ............................................................................................... 2

List of Modules – Service Manual with Supplements ...................... 3

Module List ...................................................................................... 3

Technical Data ................................................................................ 4

Description (COM Module) ............................................................. 5

Wiring according to VDE ............................................................... 12

Mains Section ............................................................................... 13

LS Socket Board ........................................................................... 13

COM Module ................................................................................. 14

•Block Circuit Diagram .............................................................. 14

•Microcomputer ......................................................................... 15

•Mega Text ................................................................................ 16

•Modulator FSK ......................................................................... 17

•Diplexer circuit ......................................................................... 18

•Power circuit ............................................................................ 19

Multi/Com PCB ............................................................................. 20

Spare Parts Lists ........................................................................... 21

Notes

Before opening the cabinet disconnect the mains plug! Wiring

Before disconnecting any leads and especially the earth connecting leads observe the way they are routed to the individual assemblies like the chassis, mains switch panel, keyboard control panel, picture tube panel, deflection unit, loudspeaker and so on. On completion of the repairs the leads must be laid out as originally fitted at the factory to avoid later failures or disturbances.

Mains cable

The TV receiver must only be operated with an original mains connecting cable with an interference suppressor choke integrated in the mains plug.This mains cable prevents interference from the mains supply and is part of the product approval. For replacement please order exclusively the mains connecting cable specified in the spare parts list.

2 GRUNDIG Service

CUC 2003 H Allgemeiner Teil / General Section

Modulauflistung – Service Manual mit Ergänzungen List of Modules – Service Manual with Supplements

Modul

Module

Ton - Filterplatte Sound Filter Panel

Bildrohrplatte CRT Panel

Netzteil (5V / 0,4A) Mains Section (5V / 0,4A)

LS-Buchsenplatte LS Socket Board

COM - Modul COM - Module

Materialnummer

Part Number

293051290100

293050221900

293040508400

293051606600

295041082400

Service Manual

CUC 2003 / 2003 H

720100240000 720100240200

Seite / Page 3-30 –

Seite / Page 3-25 –

– Seite / Page 13

– Seite / Page 14

2. Ergänzung

Supplement 2

CUC 2003 H

Modulübersicht / Module List

Materialnummer

Bestell-Nr. Order No.

Chassis-Nr. Chassis No.

Tuner

Ton - Filterplatte Sound Filter Panel

Bildrohrplatte CRT Panel

Netzteil (5V / 0,4A) Mains Section (5V / 0,4A)

LS-Buchsenplatte LS Socket Board

Part Number

295043010100

29305 129 0100

293050221900

293040508400

293051606600

T 55 - 830 Multi/COM

CUC 2003 H

VNM

GCL5272

297040064000 297040065900 297040066000

•

Fernbedienung TP 800 H Remote Control TP 800 H

COM - Modul COM - Module

GRUNDIG Service 3

296420611900

295041082400

•

Allgemeiner Teil / General Section CUC 2003 H

Technische Daten / Technical Data

T 55 – 830 Multi/COM

CUC 2003 H

VNM

Bildröhre / Picture Tube

Sichtbares Bild Visible picture

51cm

Bildschirmdiagonale Screen diagonale

Ablenkwinkel Deflection angle

Bildwechselfrequenz Vertical frequency

Elektronik / Electronic

Programmspeicherplätze Programme positions

Blue stretch, ja / yes

AV-Auswertung AV evaluation

Tuner

TV-Normen TV-Standards

Videotext Teletext

Musikleistung Music power

Anschlüsse Front / Connections Front

Kopfhörer Headphones

Anschlüsse Rückwand / Connections Rear Panel

auf jeden Programmplatz programmierbar

programmable for every programme position

PLL-Frequenz synthesizer tuning UHF / VHF PLL-frequency synthesizer tuning UHF / VHF

schaltet eingebauten Lautsprecher ab /

55cm (21"), FST

Black Line D, small neck

90°

50Hz

99 + 1 AV

PAL / SECAM / NTSC 4,43MHz,

B/G, L/L', I DK/K'

8 Seiten TOP/FLOF-text,

8 pages TOP/FLOF-text

Mono 8W

Mono 3,5mm Klinke,

Mono 3.5mm jack,

switch off inserted Loudspeaker

FBAS-Ein-/Ausgang, RGB-Eingang

Euro AV 1(schwarz/black)

Netzteil / Mains Stage

Netzspannung (Regelber.) Mains voltage (variable)

Netzfrequenz Mains frequency

Leistungsaufnahme Power consumption

Standby ca. 12W

S-Video Eingang

CCVS in-/output, RGB input,

S-Video input

230V ±15%

50 / 60Hz

ca. 65W

4 GRUNDIG Service

GRUNDIG Service 5

iTV-Card / COM-Card

Page 1 of 15

BlockDiagram

CVBS, SYNCs

RGB, BLANKING

C local

C main

POWERsupply

LEDtv

AUDIO

MUTE

C BUSY

SPIinterface

RFup/down

PROGRAMMING

MegaText

MicroController

Power

FSK + Diplexer

PROM

MONITOR TVoff

DRAM (OPT.)

VCO/PLL

Ceeprom

CMegaText

Clocks

+5Volt

OnBoardLedInterface

BuzzerInterface

ChassisID

LATTICE, glue logic

iTV-Card / COM-Card

Page 2 of 15

Connectors

CN6 CN1

NotConnected VsyncToMegaText GND HsyncToMegaText +5Volt MonitorTVOff

GND +5Volt

CN2 CN3

GND SCLLocal BlueFromMegaText SDALocal GreenFromMegaText GND RedFromMegaText IRToTV BlankingFromMegaText IRFromTV CVBSToMegaText LocalI2CbusBusy

CN4 CN5

AlarmOut +5Volt MuteOut TVLedOut

SDAMain SCLMain

Diese Beschreibung (COM Modul) gibt es nur in englischer Sprache

This description (COM Modul) exists only in English.

CUC 2003 H Allgemeiner Teil / General Section

6 GRUNDIG Service

iTV-Card / COM-Card

Page 3 of 15

VCCd SPIMISO SPIMOSI SPISCK GND SPISS SPIACK NotConnected

J4 GND VCCd PTA7 PTC3 ResetUc PTC1 Vtst PTA0 GND ispLSIout IspLSIIn PTC0 IspLSIEnable UcClock LatticeOe ispLSIMode ispLSISclk

CN1: H/V Syncs from TV to MegaText for synchronisation of RGB with the TV

Monitor TVoff state on pin3. This is 0Volt when the TV is Off (by PowerSwitch) and 13.5-

14.5Volt on all other states.

CN2: CVBS from TV to MegaText

Red/Green/Blue/Blanking-signals from MegaText to TV Monitor LocalI

C-bus busy status line

CN3: Access to the LocalI

C-bus (I

C-bus in the TV)

IR-signal from TV and IR-signal to TV

CN4: Mute output and Alarm (Sound) output to the TV

CN5: TV led output

CN6: Power input from the TV, only +5Volt will be used by the card

J5: Access to the MainI

C-bus in the TV

J1: RJ45-connector for the PlayStationController

J4: Connector used for first time programming of the MicroController and the Lattice (PLD)

iTV-Card / COM-Card

Page 4 of 15

Board description

First Time Programming

Overview

After assembling the card, the MicroController and the Lattice have to be programmed via the J4 connector. The Lattice has to be programmed first because this PLD contains logic neccessary for the MicroController to run properly.

Downloading of the Lattice software must be done with an ispDownLoadCable and ispDownLoad- software, available from the Lattice distributor. The Lattice is only re-programmable by the ispDownLoad-software+DownLoadCable, it isnÕt in-circuit programmable.

After the Lattice has been programmed, the MicroController can be downloaded with a program which contains the following modules:

1. Test software for the Grundig-factory, and

2. FSK-Bootloader program

The FSK-Bootloader program makes it possible to update (download) new software in the MicroController via the FSK-modem. This means that the card is downloadable while it is working (in field programmable) as long as there is a FSK-connection with the MasterModem.

For mass production, both the Lattice and the MicroController can be purchased pre-programmed from the supplier, so the programming procedure can be skipped and the card is operational immediately after assembly.

Lattice connections

The connections neccessary for programming the Lattice are: IspLSIin IspLSIout IspLSIenable IspLSIsclk IspLSImode

The ispLSIenable pin is used to select the Lattice and enabling of the other four control-signals (enabling of the programming-protocol). Programming is done by the ispLSImode-pin, used for commands (program, verify), the ispLSIsclk-pin, used as the serial clock, the ispLSIin-pin, used for data to the Lattice and the ispLSIout-pin, used for data from the Lattice (verify, readback). For further instructions, please consult the Lattice data book.

MicroController connections

The connections neccessary for downloading the MicroController are: PTA0 PTA7 PTC0 PTC1 PTC3 Vtst Ucclock

Allgemeiner Teil / General Section CUC 2003 H

GRUNDIG Service 7

iTV-Card / COM-Card

Page 5 of 15

LatticeOE ResetUc

Programming will be done by an 9600Baud serial protocol, where PTA0 is the bidirectional data in/out of the MicroController, and PTA7, PTC0, PTC1, PTC3 are used to select this programming-mode. In this mode the MicroController expects a 9.8304MHz clock, therefore we supply this clock to the card while disabling the onboard MicroController-clock by the LatticeOE pin. The onboard clock is routed through the Lattice with the possibility to TRI-state the output with the LatticeOE line. In normal operation, the LatticeOE-pin wonÕt be used and the onboard clock is always driving the MicroController.

With the ResetUc it is possible to reset the MicroController if this is neccessary for the programming- protocol.

iTV-Card / COM-Card

Page 6 of 15

Clock generation

Overview

The onboard clocks can be divided into three parts, the MegaText clock, the DownConverter clock and the clocks for the MicroController + FSK transmission and receiving.

MegaTextClock

All the internal clocks used by the MegaText-chip (U1) are derived from one external XTAL of 20.48MHz (X6), connected directly to the MegaText-chip. From this XTAL, the MegaText will generate a synchronised internal-clock to the external supplied H and V-sync(or CVBS), and uses this clock for the R/G/B and Blanking output-signals. This means that the MegaText output is always synchronised to theTV.

DownConverterClock

The DownConverter (U7, MC13156DW) has one external clock-input (LocalOscillator-input) used to down-convert the incoming signal to 10.7MHz. The XTAL (X4) used for the generation of this LocalOscillator is a 3th overtone 63.3625MHz crystal with a load-capacitance of 32pF. The crystal-circuit of X4, L14, L15, C62, C63, C64, R101, R102 and R149 makes sure that the crystal will run on the 3th- harmonic.

MicroController + FSK-clocks

The clocks for the MicroController and the FSK-part have to be synchronised to make sure that the two FSK-transmission frequencies are in phase, the MicroController is in phase with the FSK-transmission frequencies and that the MicroController-clock is in phase with the extracted FSK-data. Therefore a multiple VCO/PLL-chip (U12, FS6377) is used wich will use only one external XTAL (X7, 16MHz) to produce four programmable output clocks.

The programming of the chip will be done by the MicroController via an I

C-bus interface. The four output

clocks are:

1. 32MHz, used for the MicroController,

2. 42.8MHz, used to extract the data from the received FSK-signal,

3. 16MHz and

4. 16.125MHz as FSK-transmission frequencies.

All these four clock-signals are routed directly into the PLD, the 16MHz and 16.125MHz for FSK- generation, the 42.8MHz for FSK data extraction and the 32MHz to have the possibility to disable (TRI- state) this clock (see

MicroController connections

section) and to switch the MicroController to the desired clock source. After PowerUp of the card the VCO/PLL-chip has all his registers in the reset-state, wich will mean that all the outputs reflect the incoming clock, in this case 16MHz. At this point there isnÕt a 32MHz-clock for the MicroController. Therefore the MicroController-clock will be switches after PowerUp into the PLD to 16MHz (the 16MHz-output of the VCO/PLL-chip). The MicroController will then initialize everything including the VCO/PLL-chip. When this chip is programmed the MicroController will select the 32MHz- clock source as his clock by clearing the uCClockSwitch-line wich will cause the PLD to switch to 32MHz instead of 16MHz.

CUC 2003 H Allgemeiner Teil / General Section

8 GRUNDIG Service

iTV-Card / COM-Card

Page 7 of 15

DownConverter

The receiving FSK-frequency is 74/74.125MHz. DownConverting this input with a 63.3625MHz clock will produce two frequencies of 10.6375 and 10.7625. This means that we have a centre frequency of 10.7MHz plus or minus 62.5kHz. This makes it possible to use a common, low-cost ceramic filter of 10.7MHz.

After the downconversion, the signal will pass two 10.7MHz filters before entering the 74HCU04 (U8). Using all 6 stages of the 74HCU04 will produce a nice digital TTL-signal representing the FSK-input. A hysteresis-circuit at the first two stages (R143, 470K) makes sure that noise at the input will be suppressed.

The digital-data with the 10.7MHz centre-frequency will then be routed to the PLD to extract the FSK- signal.

iTV-Card / COM-Card

Page 8 of 15

LATTICE PLD

Block diagram

16MHz

16.125MHz

FSK transmitter

TxDataFromuC

FSKTxON

FSKTxDataDigital

42.8MHz

FSK receiver

RxDataTouC

FSKRxDataDigital

16MHz 32MHz

UCClockSwitch + OE

uCClockSwitch

uCClock

LatticeOE

IR Multiplexer

IRtoTV

IRFromTV IRFromuC

IRecho

Allgemeiner Teil / General Section CUC 2003 H

+ 18 hidden pages