Document Overview
This document serves as a supplementary service manual for the Grundig CUC 7303 FR television receiver. It details the differences and additional modules fitted to the TV. For complete service information, it is essential to refer to the following base documents:
- Service Manual "Safety" (Part No. 72010-800.00)
- Service Manual CUC 7303 FR (Part No. 72010-019.60)
The module list and relevant part numbers are provided in the table on page 3.
Visual Description of TV Chassis (Page 1)
The first page features a detailed internal view of the TV chassis, showcasing the main circuit board with various electronic components such as capacitors, resistors, integrated circuits, and connectors. Wires and cables connect different sections of the board. The image is overlaid with a grid and labels indicating supplementary manual references for specific parts of the service. The overall layout suggests a compact design for a television receiver.
Safety Regulations
The regulations and safety instructions provided in the "Safety" Service Manual (part number 72010-800.00), as well as respective national deviations, must be observed.
Table of Contents
- Technical DataPage 2
- Module ListPage 3
- Test EquipmentPage 3
- Chassis BoardPage 3
- OscillogramsPage 9
- General Circuit DiagramPage 11
- CRT Panel 29305-022.87Page 16
- Spare Parts ListsPage 18
Technical Data (P 37-842 FR / CUC 7303 FR)
| Category | Parameter | Value |
|---|---|---|
| Picture Tube | Visible picture size | 34cm |
| Screen diagonal | 37cm (14") Tinted glass | |
| Deflection angle | 90° | |
| Vertical Frequency | Vertical frequency | 50Hz |
| Electronic | Programmable program positions | 69 TV + 1 AV |
| AV evaluation | Programmable for every program position | |
| Tuner | Hyperband tuner (8MHz spacing for cable TV) | |
| TV-Standard | PAL/SECAM / B/G, I, L/L' | |
| Music Power | Music power | 2W |
| Front Connections | Headphones | 3.5mm stereo jack, controllable volume |
| Rear Panel Connections | Euro AV (black) | FBAS in-/output, RGB input |
| Mains Stage | Mains voltage (variable) | 165...265V~ |
| Mains frequency | 50/60Hz | |
| Power consumption (normal / standby) | approx. 35W / approx. 9W |
Module List
| Model | Order No. | Chassis | Tuner | CRT Panel | Remote Control |
|---|---|---|---|---|---|
| P 37-842 FR (CUC 7303 FR) | G.CG 9402 FB | 29704-004.05/06 | 814-060-1614 or 814-060-1610 | 29305-022.87 | 29642-062.11 |
Test Equipment
The following test equipment is required for servicing:
- Variable isolating transformer
- Dual channel oscilloscope
- Digital multimeter
- Millivoltmeter
- Colour generator
- AF generator
- Stabilized power supply
- Frequency counter
These test equipments can be ordered from the Grundig Service organization or at the address provided below. Some of these test equipments are also available on the market.
Grundig France Contact Information
5, Bld Marcel Pourtout92563 RUEIL MALMAISON Cedex
Tel: 01 41 39 26 26
Telefax: 01 47 08 69 48
eMail: instruments@grundig.de
Internet: http://www.grundig-instruments.de
Layout of the PCBs and Circuit Diagrams
Chassis Board Component Coordinates (Top Side)
This section provides a detailed list of component coordinates (X, Y) for the Chassis Board, viewed from the top side. The coordinates are crucial for locating specific components on the printed circuit board during servicing. The list includes various components such as capacitors (C), diodes (D), integrated circuits (IC), fuses (F), inductors (L), resistors (R), transistors (T), and other miscellaneous parts (e.g., Btx, NETZ, SCART, TUNER).
Chassis Board Component Coordinates (Bottom Side)
Similar to the top side, this section provides component coordinates (X, Y) for the Chassis Board, viewed from the solder side (bottom side). This comprehensive listing ensures that technicians can accurately identify and access components from either side of the PCB for repair and maintenance.
Description of PCB Layout Diagrams (Pages 5 & 6)
Pages 5 and 6 present detailed diagrams of the Chassis Board layout. Page 5 shows the component side (top view), illustrating the placement of various electronic components on the board. A grid system with X and Y coordinates (ranging from 0 to 290) is used to precisely locate each component. Key areas like the power supply (NETZ), main integrated circuits (e.g., IC810, IC850, IC830), and major connectors (e.g., SCART) are visible. The diagram includes labels for individual components (e.g., C601, R654, D816, L601) and functional blocks. Page 6 displays the solder side (bottom view) of the same Chassis Board, also using a coordinate grid. This view is essential for understanding the traces and solder points, complementing the top-side component placement. Both diagrams are critical for troubleshooting and component replacement.
Oscillograms
This section presents a series of oscillograms (waveforms) crucial for diagnosing and troubleshooting the TV. Each oscillogram is labeled with a number and specifies the voltage per centimeter (V/cm or mV/cm) and time per centimeter (µs/cm, ms/cm, or ns/cm) settings of the oscilloscope. Key voltage levels like +OV, -OV, +1.5V, and -6V are indicated. The waveforms depict various signals at different test points within the TV's circuitry, such as power supply outputs, video signals, and control signals. For example, oscillogram (1) shows a 500mV/cm, 5µs/cm waveform, while oscillogram (4) shows a 100V/cm, 5µs/cm waveform in operation. These visual representations of electrical signals are indispensable for verifying proper circuit operation and identifying anomalies.
General Circuit Diagram (Chassis Board)
Description of Circuit Diagrams (Pages 8 & 9)
Pages 8 and 9 provide the comprehensive general circuit diagram (synoptic diagram) of the Chassis Board. This diagram illustrates the interconnections and functional blocks of the television's electronic system. Key sections include the power supply, tuner, video processing (e.g., TDA8362A, TDA4662T), audio processing, deflection circuits (horizontal and vertical), and control logic. Components are represented by standard circuit symbols, and their reference designators (e.g., C, R, D, IC, T) are clearly marked. Voltage levels (+H, +B, +12V, +33V, +8V) and signal paths are indicated. Connections to external modules like the CRT panel and remote control are also shown. The diagram includes notes on specific ICs (e.g., SDA5222, MC14094) and their functions. This detailed schematic is fundamental for understanding the TV's operation and for advanced troubleshooting.
CRT Panel 29305-022.87
Description of CRT Panel Circuit Diagram (Page 10)
Page 10 presents the circuit diagram for the CRT Panel (29305-022.87). This schematic focuses on the components directly associated with the cathode ray tube, including video amplifiers, high voltage generation, and connections to the chassis. It details various components like transistors (e.g., BF421, BF422, BF871), resistors, capacitors, and diodes, along with their values and part numbers. Different CRT types (e.g., 14" ORION, 14" PHILIPS, 17", 20" SAMSUNG, 21" SN PHI) are listed with corresponding component variations. The diagram also includes important safety notes regarding high tension for the picture tube and X-radiation, emphasizing the need for precise adjustment of the +A power supply and caution with protective circuits.
Description of CRT Panel Component Side and Solder Side Views (Page 11)
Page 11 provides the component side (top view) and solder side (bottom view) layouts of the CRT Panel. These diagrams, similar to the main chassis board layouts, use a grid system to show the physical placement of components and the routing of traces. The component side view illustrates the arrangement of parts like transistors (T781, T736, T741, T761), capacitors (C781, C814), and resistors (R773, R739). The solder side view shows the corresponding solder points and copper traces. These visual aids are essential for technicians to accurately identify and work on the CRT panel components.
Oscillograms for CRT Panel (Page 11)
Page 11 also includes a set of oscillograms specific to the CRT Panel. These waveforms, labeled (1) through (6), show signals at various test points on the CRT board, with specified voltage and time scales (e.g., 1V/cm, 20µs/cm; 50V/cm, 20µs/cm). These oscillograms are vital for verifying the correct operation of the video and high-voltage circuits on the CRT panel.
Spare Parts List
Description of Spare Parts Lists (Pages 12 & 13)
Pages 12 and 13 contain comprehensive spare parts lists for the Grundig CUC 7303 FR TV. The lists are organized by position number (POS. NR.), figure number (ABB. FIG.), part number (SACHNUMMER / REFERENCE), quantity (ANZ. NB), and description (BEZEICHNUNG / DESIGNATION) in both German and French. The parts are categorized into main TV components (e.g., housing, remote control, picture tube) and specific chassis board components (e.g., capacitors, diodes, transistors, ICs, coils, transformers). This detailed inventory is crucial for ordering replacement parts and ensuring proper maintenance and repair of the television.
Grundig Service Locations
Description of Service Locations (Page 14)
Page 14 provides a list of Grundig service locations across Germany and Europe. The page features a map-like representation indicating various service centers. For Germany, locations include Hamburg, Köln, Berlin, Mannheim, and Nürnberg, each with an address and telephone number. For Europe, a comprehensive list of Grundig service centers is provided for countries such as Belgium (Zaventem), UK (Borehamwood, Rugby), Ireland (Dublin), France (Rueil Malmaison), Switzerland (Kloten), Portugal (Cruz Quebrada), Spain (El Prat De Llobregat), Norway (Ski), Denmark (Værløse), Finland (Espoo), Sweden (Solna), Poland (Kalisz), Austria (Wien), Netherlands (Amsterdam), and Italy (Trento). Each entry includes the city, address, and telephone number, facilitating contact for service and support.
