GRUNDIG Service
1 - 2
Allgemeiner Teil / General Section
CUC 7301
Table of Contents
Page
General Section ................................... 1-1... 1-14
Technical Data ............................................................................. 1-3
Module List ................................................................................... 1-4
Safety Advice ............................................................................... 1-4
Hints to the Components ............................................................. 1-4
Hints to the Oscillograms ............................................................. 1-5
Circuit Diagram Symbols ............................................................. 1-6
Service Instructions (P 37-070) .................................................. 1-11
Special and Service Functions ................................................... 1-13
Descriptions ......................................... 2-1... 2-10
1. Power Supply ........................................................................... 2-1
2. System Control ........................................................................ 2-3
3. TV Signal Processor TDA 8362 A ............................................ 2-4
3.1 Overview ................................................................................ 2-4
3.2 IF ........................................................................................ 2-4
3.3 CCVS-Signal ...................................................................... 2-4
3.4 External CCVS Signal ........................................................ 2-5
3.5 Sound IF ............................................................................. 2-5
3.6 Luminance and Chrominance Signal ................................. 2-5
3.7 SECAM Signal Path
and Automatic PAL/SECAM Switching .............................. 2-6
3.8 RGB Signal Path ................................................................ 2-7
3.9 Generation of the Horizontal and Vertical Sync Signals .... 2-7
3.10 Line Oscillator .................................................................. 2-8
3.11
1-Phase Control ............................................................ 2-8
2-Phase Control ............................................................ 2-8
3.13. The Super Sandcastle SSC ............................................ 2-8
3.14 Setting of the Cut-Off Voltage .......................................... 2-8
3.15 The HDR Output Stage .................................................... 2-8
3.16 The Field Deflection Stage ............................................... 2-9
3.17 Non-Interlace Compensation with Teletext ...................... 2-9
3.18 Coinzidence ..................................................................... 2-9
Block Circuit Diagram ............................................................. 2-10
Adjustments ................................................... 3-2
Chassis Board .............................................................................. 3-2
Layout of the PCBs
and Circuit Diagrams ......................... 4-1... 4-20
Chassis Board .............................................................................. 4-1
Oscillograms ................................................................................ 4-7
General Circuit Diagram .............................................................. 4-9
Tuner 29504-201.21/.31 ............................................................ 4-14
Oscillogrammes CRT Panel ....................................................... 4-18
CRT Panel 29305-022.14/.15 .................................................... 4-19
Spare Parts List .................................... 5-1... 5-8
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Inhaltsverzeichnis
Seite
Allgemeiner Teil .................................. 1-1... 1-14
Technische Daten ....................................................................... .1-3
Modulübersicht ............................................................................. 1-4
Sicherheitshinweise ..................................................................... 1-4
Hinweise zu den Bauteilen ........................................................... 1-4
Hinweise zu den Oszillogrammen ................................................ 1-5
Schaltplansymbole ....................................................................... 1-6
Bedienungsanleitung (P 37-070) ............................................... 1-11
Sonder- und Servicefunktionen .................................................. 1-13
Beschreibungen ................................... 2-1... 2-10
1. Netzteil ..................................................................................... 2-1
2. Systemsteuerung ..................................................................... 2-3
3. TV-Signalprozessor TDA 8362 A ............................................. 2-4
3.1 Übersicht ............................................................................ 2-4
3.2 ZF ....................................................................................... 2-4
3.3 FBAS-Signal ....................................................................... 2-4
3.4 Externes FBAS-Signal ....................................................... 2-5
3.5 Ton-ZF ............................................................................... 2-5
3.6 Luminanz- und Chrominanzsignal ...................................... 2-5
3.7 SECAM-Signalweg
und automatische PAL/SECAM-Umschaltung ................... 2-6
3.8 RGB-Signalweg .................................................................. 2-7
3.9 Gewinnung der H- und V-Synchronsignale ........................ 2-7
3.10 Zeilenoszillator ................................................................. 2-8
3.11
1-Regelung ................................................................... 2-8
2-Regelung ................................................................... 2-8
3.13. Supersandcastle SSC ..................................................... 2-8
3.14 Cut-Off-Einstellung ........................................................... 2-8
3.15 HDR-Endstufe .................................................................. 2-8
3.16 Vertikal-Ablenkung ........................................................... 2-9
3.17 Non-Interlace Kompensation bei Videotext ...................... 2-9
3.18 Koinzidenz ........................................................................ 2-9
Blockschaltbild ....................................................................... 2-10
Abgleich .......................................................... 3-1
Chassisplatte ............................................................................... 3-1
Platinenabbildungen
und Schaltpläne .................................. 4-1... 4-20
Chassisplatte ............................................................................... 4-1
Oszillogramme ............................................................................. 4-7
Gesamtschaltplan ........................................................................ 4-9
Tuner 29504-201.21/.31 ............................................................ 4-14
Oszillogramme Bildröhrenplatte ................................................. 4-18
Bildrohrplatte 29305-022.14/.15 ................................................. 4-19
Ersatzteilliste ......................................... 5-1... 5-8
