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 or these TV set the Service Manual CUC 7305 is applicable.
This Supplement describes the differences and the additionally fitted
modules of the TV receiver.
The Module List and the relevant part numbers are listed in the table
on page 3.
Basic instructions for servicing are given in the:
– Service Manual "Safety" (Part No. 72010-800.00)
– Service Manual CUC 7305 (Part No. 72010-019.50)

Table of Contents
Page
General Section .................................. 1-2…1-20
Test Equipment ............................................................................ 1-3
Type Label on the set (Version Number) ..................................... 1-3
Module List ................................................................................... 1-4
Technical Data ............................................................................. 1-4
Safety Advices / Service Notes .................................................... 1-5
Circuit Diagram Symbols ............................................................. 1-6
Operating Hints (P 37-830/12 text / Globetrotter) ...................... 1-14
Special and Service Functions ................................................... 1-20
Descriptions .......................................2-8…2-14
1. Power Supply ........................................................................... 2-8
1.1 12V Power Supply ....................................................... 2-8
1.2 Power Supply ............................................................... 2-9
2. System Control ...................................................................... 2-10
2.1 Microcomputer ........................................................... 2-10
2.2 Initialisation of the Processor after Switching On ....... 2-10
2.3 Switching over of the CCVS Signals to
the EURO-AV Socket ................................................ 2-10
2.4 Entering Commands .................................................. 2-10
2.5 Teletext IC850 (SDA5254) ......................................... 2-10
2.6 On Screen Display (OSD) .......................................... 2-10
2.7 Protection Circuit USchutz .............................................. 2-10
3. TV Signal Processor TDA 8362 A .......................................... 2-11
3.1 Overview .................................................................... 2-11
3.2 IF ................................................................................ 2-11
3.3 CCVS-Signal .............................................................. 2-11
3.4 External CCVS Signal ................................................ 2-11
3.5 Sound IF ..................................................................... 2-12
3.6 Luminance and Chrominance Signal ......................... 2-12
3.7 SECAM Signal Path
and Automatic PAL/SECAM Switching ...................... 2-12
3.8 RGB Signal Path ........................................................ 2-13
3.9 Generation of the Horizontal and Vertical Sync Signals ... 2-13
3.10 Line Oscillator ............................................................ 2-13
3.11 ϕ1-Phase Control ....................................................... 2-13
3.12 ϕ2-Phase Control ....................................................... 2-13
3.13 The Super Sandcastle SSC ....................................... 2-14
3.14 Setting of the Cut-Off Voltage .................................... 2-14
3.15 HDR Output Stage ..................................................... 2-14
3.16 Field Deflection Stage ................................................ 2-14
3.17 Non-Interlace Compensation with Teletext ................ 2-14
3.18 Coincidence ............................................................... 2-14
Alignment....................................................... 3-2
Layout of the PCBs
and Circuit Diagrams ......................... 4-1…4-26
Chassis Board .............................................................................. 4-1
Chassis Board (Enlarged) ............................................................ 4-7
General Circuit Diagram ............................................................ 4-11
CRT Panel 29305 022 8700 / 9000 ........................................... 4-17
12V Power Supply 29305 007 3100 .......................................... 4-19
12V Power Supply 29305 007 3300 .......................................... 4-23
Spare Parts Lists .................................. 5-1…5-8