Philips 4000 series - Page 27

Circuit Descriptions
EN 27TPM9.2L LA 7.
2012-Mar-30
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7.2 Power Supply
Refer to figure Figure 7-2 for the power architecture of this
platform.
Figure 7-2 Power Architecture 4000 series
7.2.1 Power Supply Unit
All power supplies for TVs that are using a LED back lit LCD
panel are under repair policy. When defective, first check the
main fuse of the power board. 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 4000 series platform are:
• New power architecture for LED backlight (PSL, PSLS,
PSDL)
• “Boost”-signal is now a PWM-signal + continuous variable.
The used control signals are:
• Stand-by
• Inverter “on/off”
• DIM (PWM) (not for PSDL)
• Boost (PWM except for IPB)
The output voltages to the chassis are:
• +3.3 V-STANDBY (Stand-by mode only)
• +12 V (on-mode)
•+V
snd
(+24 V) (audio power) (on-mode)
• +24 V (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 board is conventional IPB
• LED backlight:
- side-view LED without scanning: PSL power board
- side-view LED with scanning: PSLS power board
- direct-view LED without 2D-dimming: PSL power board
- direct-view LED with 2D-dimming: PSDL power board.
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
Display power
Platform
MTK5366
PFC
Platform power
1 power- PCB
AMP
LVDS
Low stby
power
Ac-input + Mains filter
BL-ON/OFF
AC IN
DIM
12V
12V24V
24V
5V
CN7001
/CN700
19240_202_120224.eps
120224
Connector
32PFLxxx7 42PFLxxx7
no. CN8101 CN9302 CN8503 CN902
Descr. to panel to SSB to panel to SSB
Pin CN8101 CN9302 CN8503 CN902
1 VLED P_OK LED-11 P_OK
2 n.c. +5.2V LED-16 +5.2V
3 LED3 +5.2V LED-12 +5.2V