Philips 32PF9968/10 Service Manual page 70

EN 70 9. LC7.2E PA
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.
AUDIO CLASS D
9.2 PDP Power Supply
The Power Supply Unit (PSU) in this chassis is a buy-in and is
a black-box for Service. It belongs to the PDP and when
defective, a new panel must be ordered and the defective panel
must be returned for repair, unless one of the fuses of the unit
is broken. Always replace the fuse with one of the correct
specifications! This part is commonly available in the regular
market. For the correct order number, refer to the SDI PDP
Service Manual (order code see front page of this manual). The
42" and 50" supply units have different specifications.
Figure "Overview of PSU connectivity" shows the connectivity
of the Power Supply Unit with the other panels in the set.
All manuals and user guides at all-guides.com
Circuit Descriptions, Abbreviation List, and IC Data Sheets
MICRONAS
AUDIO PROC.
SDRAM
SDRAM
Figure 9-2 SSB bottom view
DC-DC CONVERSION
COMMON INTERFACE
CHANNEL
DECODER
Y & X Y & X
Driving Board Driving Board
Logic & Logic &
Address Buffer Address Buffer
Figure 9-3 Overview of PSU connectivity
All Power Supply Units deliver the following voltages / signals
to the chassis:
• +12 V to SSB (+12V_DISP).
• +12 V and -12 V to Audio Supply (-AUDIO_POWER,
+AUDIO_POWER).
• + 5 V switch voltage (+5V+SW).
• +5.2 V standby voltage (+5V_STANDBY).
G_16860_049.eps
310107
PSU PSU
SSB SSB
AC Inlet AC Inlet
H_16960_013.eps
050407