Philips 32PFL5405H/05 Service Manual page 51

7.2 Power Architecture
Refer to figure Figure 7-6
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 Service website for the order codes of the boards.
Important delta's with the TV543 platform are:
• New power architecture for LED backlight (PSL, PSLS,
PSDL)
• "Boost"-signal is now a PWM-signal + continuous variable.
The control signals are:
• Standby
• Lamp "on/off"
• DIM (PWM) (not for PSDL)
• Boost (PWM except for IPB)
• Power-OK: indicates that the main converter is functioning
(feedback signal to the SSB).
In this manual, no detailed information is available because of
design protection issues.
The output voltages to the chassis are:
• +3V3-STANDBY (standby-mode only)
• +12V (on-mode)
• +Vsnd (+24V) (audio power) (on-mode)
• +24V (bolt-on power) (on-mode)
for the power architecture of this
Figure 7-6 Power Architecture TV550 platform
Circuit Descriptions
• 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. Table
different types of displays with its associated PSUs:
Table 7-1 Supply diversity
CTN
32PFL5405H/xx
32PFL5605H/xx
32PFL7605H/xx
37PFL5405H/xx
40PFL5605H/xx
40PFL7605H/xx
42PFL5405H/xx
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.
back to
div. table
Q552.1E LA 7.
18770_234_100127.eps
7-1 Supply diversity
Supplier PSU
LGIT PLHC-P981A B
Delta DPS-138BP A
Delta DPS-199DP-1A
LGIT PLHD-P982A
Delta DPS-206CP A
Delta DPS-199DP A
LGIT PLHF-P983A
EN 51
100127
lists the
2010-Feb-19