Philips EM5E, Руководство по обслуживанию, Страница: 104 / 136

Circuit Descriptions and Abbreviation List EN 104 EM5E 9.
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: High-end Input Processor
7. Video: Feature box
8. Video: High-end Output Processor
9. Synchronisation
10. Horizontal deflection
11. Vertical deflection
12. Audio
13. Teletext / NexTView
14. CRT Panel / Rotation
15. Auto-Scavem
16. Software related features
17. Abbreviation list
18. IC Data Sheets
9.1 Introduction
The base for the 95xx Europe segment for the year 2002 is the
EM5 platform, which is the successor of the EM3 platform.
The EM2, EM3, and the EM5, make use of the same
architectural set-up, which 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. Similar
with the EM3 (but different as with the MG-chassis), 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.