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EN 116
9.
EM5A P/M
9. Circuit Descriptions and Abbreviation List
Index of this chapter
1. Introduction
2. Block Diagram
3. Power Supply
4. Control
5. Tuner & IF
6. Video: HD Jack Interface
7. Video: High-end Input Processor
8. Video: Feature box (50 Hz signals)
9. Video: Feature box (60 Hz signals)
10. Video: High-end Output Processor
11. Synchronisation
12. Horizontal Deflection
13. Vertical Deflection
14. Audio
15. Teletext
16. CRT Panel / Rotation
17. Auto-Scavem
18. Double Window (DW), PIP
19. Software Related Features
20. Abbreviation List
21. IC Data Sheets
9.1
Introduction
The architectural set-up consists of a full sized LSP/SSP
combination and a smaller double sided four layer SSB, which
is mounted on the SSP using a SIMM connector. The main
functionalities of the LSP are supply, deflection, and sound
amplification.
The main functionalities of the SSP are tuner input, SIMM
interface, I/O and interface provisions for extended functions
such as PIP.
The main functionalities of the SSB are the core TV
functionalities, being TXT/control, video and audio decoding,
feature box, video featuring, and sync/geometry control.
The LSP (single sided) is built up very conventional, with hardly
any surface mounted components on the copper side. The
EM5 LSP has a very large "hot" part, including both deflection
coils.
The SSB is a high tech module (four layer, 2 sides reflow
technology, full SMC) with very high component density and
complete shielding for EMC-reasons. Despite this, it is
designed in such a way, that repair on component level still is
possible. To achieve this, attention was paid to:
•
The position of service test lands: most of them are at the
Tuner side.
•
Accessibility (Tuner side). If there are still problems with
the accessibility, one can order an extension board (see
parts list).
•
Clearance around surface mounted ICs (for replacing).
•
Detailed diagnostics and fault finding is possible via
ComPair.
In the architecture, provisions are made for more features/
extensions like:
•
Pixel Plus.
•
Auto TV.
•
Double Window/PIP.
•
Wireless surround sound.
•
Integrated DVD-player.
Circuit Descriptions and Abbreviation List
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