Circuit Descriptions
EN 51Q552.1E LA 7.
2010-Feb-19
back to
div. table
7.2 Power Architecture
Refer to figure Figure 7-6 for the power architecture of this
platform.
Figure 7-6 Power Architecture TV550 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)
• 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 7-1 Supply diversity
lists the
different types of displays with its associated PSUs:
Table 7-1 Supply diversity
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.
18770_234_100127.eps
100127
CTN Supplier PSU
32PFL5405H/xx LGIT PLHC-P981A B
32PFL5605H/xx Delta DPS-138BP A
32PFL7605H/xx Delta DPS-199DP-1A
37PFL5405H/xx LGIT PLHD-P982A
40PFL5605H/xx Delta DPS-206CP A
40PFL7605H/xx Delta DPS-199DP A
42PFL5405H/xx LGIT PLHF-P983A
To Next Page
Loading...
