Philips 5008 Series Service Manual page 31

7.2 Power Supply
Refer to figure Figure 7-3
platform.
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 5000 series platform are:
• New power architecture for LED backlight.
• "Boost"-signal is now a PWM-signal + continuous variable.
The control signals are:
• Stand-by
• Inverter "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:
• +3V3-STANDBY (Stand-by mode only)
• +12V (on-mode)
• +Vsnd (+19V) (audio power) (on-mode)
• +24V (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.
for the power architecture of this
CN2
Display power
PFC
Figure 7-3 Power Architecture 5000 series
Circuit Descriptions
Platform power
Low stby
power
Ac-input + Mains filter
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.
back to
div. table
Q552.5HE LA 7.
CN1
BL-ON/OFF
DIM
12V
19V
3.3V
AC IN
19490_201_130402.eps
EN 31
120402
2013-Sep-20