Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 87LC7.2E LA 9.
Description of the functional blocks (bottom side):
• The “Flash Mem” chip contains the software of the TV.
• The “Micronas” is the audio demodulator/processor.
• The two SDRAM’s are used for the video processing.
• The right part of the SSB contains the digital reception
circuit. This side contains the channel decoder.
• There are two connectors for ComPair:
– One on the other side of the tuner for I2C
communication with the Reneas micro processor.
– The other one at the digital reception part, for UART
communication with the MOJO.
Figure 9-2 SSB bottom view
9.2 LCD Power Supply
The Power Supply Unit (PSU) in this chassis is a buy-in and is
a black-box for Service. When defective, a new panel must be
ordered and the defective panel must be returned for repair,
unless the main fuse of the unit is broken. Always replace the
fuse with one of the correct specifications! This part is
commonly available in the regular market.
Some models (37 and 42PFL3312) come with a so-called IPB
(Integrated Power Board) power supply. This power supply
also incorporates the backlight inverters.
Three different PSU can be used in this chassis:
• 26 and 32 inch sets use a “Delta” PSU
• 37 and 42 inch sets use a “PPS” (Philips Power Solutions)
PSU, except IPB PSUs; they come from “Delta”.
• 47 inch sets use a “Delta” PSU.
Figure “Overview of PSU connectivity” shows the connectivity
of the Power Supply Unit with the other panels in the set.
Figure 9-3 Overview of PSU connectivity (for non-IPB sets)
All Power Supply Units deliver the following voltages to the
chassis:
• +24 V to the inverters
• +12 V to SSB
• +12 V and -12 V to Audio Supply
• 12 V to Bolt-on Supply (where applicable)
• +5.2 V Standby voltage.
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DC-DC CONVERSION
AUDIO CLASS D
COMMON INTERFACE
FLASH
MEM
SDRAM
SDRAM
CHANNEL
DECODER
MICRONAS
AUDIO PROC.
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