Back-End; Back-End Key Component Overview; Hd Sets @ 50 / 100 Hz; Block Diagram Display Control Hd-Sets 50 / 100 Hz - Philips Q528.1E Service Manual

Circuit Descriptions, Abbreviation List, and IC Data Sheets
The Conditional Access Interface supports direct control and
communication to the PC-Card attached to a PCMCIA
interface. The interface supports the DVB CI-CA and
CableCard specification.
9.7

Back-end

Refer to figures "Architecture of TV520 platform" earlier in this
chapter for details. Refer also to block diagrams B04, B05 and
B06.
Table 9-1 Back-End key component overview
Region/
specification Processing
EU
HD @ 50 Hz PNX5050
HD @ 100 Hz
fHD @ 50 Hz
fHD @ 100 Hz
PNX8535 PNX8535
M2 M2
MIPS MIPS StdBy StdBy
Picture
enhancement DFI panel
Pacific no
yes
LVDS LVDS
PNX5050 PNX5050
YUV YUV
10b 10b
2x DDR 2x DDR
Select-AnaPWM Dimming Select-AnaPWM Dimming
PWM Boost PWM Boost
Figure 9-13 Block diagram display control HD-sets 50 / 100 Hz
9.7.1

HD sets @ 50 / 100 Hz

In HD sets (50 / 100 Hz), the output signal coming from the
PNX8535 is fed to the PNX5050 and then to the PACIFIC 3; the
PACIFIC 3 also drives the AmbiLight units. The PACIFIC 3 also
generates the pulse-width modulated signal needed for the
"Dimming Backlight" feature, which ensures additional motion
sharpness. As some displays require an analogue signal to
switch the LCD, a multiplexer is added to transform the puls-
width modulated signal. An additional signal, coming from the
PNX8535, makes the selection between analogue and pulse-
width modulation, depending on which display is used.
Scanning Backlight displays require an analogue signal, and all
other displays a pulse-width modulated.
Refer to figure "Block diagram display control HD-sets 50 / 100
Hz".
10b 10b
Debugging only !! Debugging only !!
Pacific 3 Pacific 3
RGB RGB
10b 10b
SPI-flash SPI-flash
M25P05-AVMN6P M25P05-AVMN6P
9322 206 45668 9322 206 45668
PWM-Ambi PWM-Ambi
P87LPC764 P87LPC764
PWM PWM
Dimming Dimming
Q528.1E LA
LVDS LVDS
10b 10b
LVDS
HD
HD DF
BDH BDH
MUX MUX
+ +
AmbiLight AmbiLight
Level Level
shift shift
Converter Converter
+ +
MUX MUX Scanning Scanning
Backlight Backlight
PWM (Analog ) PWM (Analog )
Dimming Dimming
Display Display
Analog Boost Analog Boost Supply Supply
Converter Converter
H_16770_129.eps
9. EN 135
270307