Philips 40PFL3088H/12 - Page 42

Circuit Descriptions
EN 42 TPN10.1E LA7.
2013-Oct-18
back to
div. table
Figure 7-7 Power Architecture ( for 20" & 22" & 24")
7.2.1 Power Supply Unit
All power supplies are a black box for Service. When defective,
a new board must be ordered and the defective one must be
returned, unless the main fuse of the board is broken. Always
replace a defective fuse with one with the correct
specifications! This part is available in the regular market.
Consult the Philips Service web portal for the order codes of the
boards.
Important delta’s with the TPN10.1E LA classis platform are:
• New power architecture for LED backlight
• “Boost”-signal is now a PWM-signal + continuous variable.
The control signals are:
• Stand-by
• Lamp “on/off”
• DIM (PWM) (not for PSDL)
In this manual, no detailed information is available because of
design protection issues.
The output voltages to the chassis are:
• +4V7-STANDBY (Stand-by mode only)
• +12V (on-mode)
• +Vsnd (+12V) (audio power) (on-mode)
• +12V (bolt-on power) (on-mode)
• Output to the display; in case of
- IPB: High voltage to the LCD panel
- PSL and PSLS (LED-driver outputs)
- PSDL (high frequent) AC-current.
7.2.2 Diversity
The diversity in power supply units is mainly determined by the
diversity in displays.
The following displays can be distinguished:
• CCFL/EEFL backlight: power panel is conventional IPB
• LED backlight:
- side-view LED without scanning: PSL power panel
- side-view LED with scanning: PSLS power panel
- direct-view LED without 2D-dimming: PSL power panel
- direct-view LED with 2D-dimming: PSDL power panel.
PSL stands for Power Supply with integrated LED-drivers.
PSLS stands for a Power Supply with integrated LED-drivers
with added Scanning functionality (added microcontroller).
PSDL stands for a Power Supply for Direct-view LED backlight
with 2D-dimming.
7.2.3 Connector overview
Table 7-1 Connector overview
19531_201_130926.eps
130926
Display power
Platform
NT72567BG-BA
PFC
Platform power
1 power- PCB
LVDS AMP
Low stby
power
Ac-input + Mains filter
BL-ON/OFF
AC IN
CN9901
CN8101
DIM
12V
12V
CN701
AMP
12V
Connector
Number CN9101 CN8501 CN9904
Description to SSB to panel to SSB
Pin 14 12 14
1DIMLED1+DIM
2 On/off n.c. ON/OFF
3 PS_ON LED1- n.c.
4n.c.LED1-n.c.
5 GND n.c. GND
6 GND n.c. GND
7 GND n.c. GND
8 GND n.c. GND
9 +12V-AUDIO LED1- +12V-AUDIO
10 +12V-AUDIO LED1- +12V-AUDIO
11 +12V_AL n.c. +12V
12 +12V_AL LED1+ +12V
13 +12_AL - +12_AL
14 +12_AL - +12_AL