Philips 32PFL5405H/05 Service Manual page 59

Notes to figure 7-26 TCON block
• LVDS receiver: converts the data stream back into RGB
data and SYNC signals (Vsync, Hsync, Data Enable - DE)
• ODC: Over Drive Circuit - to improve LC response
• Data Path Block: the video RGB data input to data path
block is delayed to align the column driver start pulse with
the column driver data
+ 12V
7.10.1 TCON Programming
For LGD - TCONs, the EEPROM can be programmed via
2
ComPair (via I C communication).
For Sharp - TCONs, the data can be flashed with a "SPI
Programmer" (via SPI communication). This device has to be
ordered separately.
7.10.2 TCON Alignment
The purpose of TCON alignment is to obtain equal voltages for
both positive and negative LC polarity. This is to avoid "flicker"
and "image sticking".
The alignment value for the TCON is stored in the main
software and is automatically set to the correct value when you
enter the display code via the service menu. No manual
alignment is needed.
diagram:
D C /D C
C o n tro lle r
Figure 7-27 TCON DC/DC converters
Circuit Descriptions
• Timing Control Function: generates control signals to
column drivers and row drivers (Source Enable - SOE,
Gate Enable - GOE, Gate Start Pulse - GSP).
For an overview of the TCON DC/DC converters, refer to figure
7-27 TCON DC/DC
L G D S H P
V G H +2 8 V +3 5 V
V G L -6 V
V c c +3 V 3 +3 V 3
V c c +1 V 8 +1 V 2
Vre f +1 6 V +1 5 V 2
V d d +1 6 V +1 5 V 6
back to
div. table
Q552.1E LA 7.
converters.
W h ere U sed
To G a te D riv e rs (G a te
H ig h Vo lta g e )
To G a te D riv e rs (G a te
-6 V
L o w Vo lta g e )
Tim in g C o n tro lle r IC
S u p p ly Vo lta g e
Tim in g C o n tro lle r IC
S u p p ly Vo lta g e
G a m m a R e fe renc e
Vo lta g e
S o u rc e D riv e r S u p p ly
Vo lta g e
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EN 59
100128
2010-Feb-19