Hd Sets @ 50 / 100 Hz; Full-Hd Sets @ 50 / 100 Hz - Philips 32PFL9432/98 Service Manual

Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.8.1

HD sets @ 50 / 100 Hz

In HD sets (50 / 100 Hz), the output signal coming from the
PNX85xx 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-
9.8.2

Full-HD sets @ 50 / 100 Hz

In full-HD sets @ 50 / 100 Hz, the output signal coming from the
PNX85xx is fed to the PNX5050 and then to the PACIFIC 3.
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 PNX85xx, makes the
selection between analogue and pulse-width modulation,
depending on which display is used. Scanning Backlight
PNX85xx PNX8535
M2 M2
PNX5050 PNX5050
YUV YUV
10b 10b
MIPS MIPS StdBy StdBy
Select-AnaPWM Dimming Select-AnaPWM Dimming
PWM Boost PWM Boost
Figure 9-17 Block diagram display control HD-sets 50 / 100 Hz
PNX85xx
M2
PNX5050
YUV
10b
MIPS StdBy
2x DDR
Select -AnaPWM Dimming
I2C-Scanning (no dimming)
PWM Boost
Figure 9-18 Block diagram display control Full-HD sets 50 / 100 Hz
width modulated signal. An additional signal, coming from the
PNX85xx, 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".
LVDS LVDS
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
2x DDR 2x DDR
PWM PWM
Dimming Dimming
Converter Converter
MUX MUX
Converter Converter
displays require an analogue signal, and all other displays a
pulse-width modulated. The signal for "Scanning Backlight" is
2
an I C signal coming from the PNX85xx.
It should be noted that for full-HD sets @ 100 Hz an additional
Dynamic Frame Insertion (DFI) panel is used. Refer to the next
section in this manual for details.
Refer to figure "Block diagram display control Full-HD sets 50 /
100 Hz".
LVDS
10b
Debugging only !!
Pacific 3
RGB
10b
SPI-flash
M25P05-AVMN6P
9322 206 45668
PWM
Dimming
Converter
MUX
Converter
Q528.1A LA
LVDS LVDS
10b 10b
LVDS
HD
HD DF
BDH BDH
MUX MUX
+ +
AmbiLight AmbiLight
Level Level
shift shift
+ +
Scanning Scanning
Backlight Backlight
PWM (Analog ) (Analog )
Dimming Dimming
Display Display
Analog Boost Analog Boost Supply Supply
H_16770_129.eps
240707
LVDS
10b
LVDS
fHD
fHD 2fv
with DFI
AmbiLight
+
Scanning
Analog (PWM)
Dimming
Backlight
PWM (Analog )
Dimming
Display
Analog Boost Supply
H_16770_130.eps
240707
9. EN 179