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7.2
Power Supply
Refer to figure
Figure 7-2
platform.
Display Interfacing
CN8101
Display power
7.2.1
Power Supply Unit
All power supplies are a block box for Service. When defective,
a new board must be ordered and 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 TPR14.1A 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)
•
+24V (bolt-on power) (on-mode)
for the power architecture of this
PFC
Ac-input + Mains filter
Figure 7-2 Power Architecture
Connector
32"
no.
CN9101
CN8501
Descr.
to SSB
to panel
Pin
14
8
1
DIM
VLED+
2
ON/OFF
VLED+
3
n.c.
n.c.
4
n.c.
n.c.
Circuit Descriptions
Platform power
BL-ON/OFF
DIM
12V
12V-Audio
Low stby
power
AC IN
CN9901
•
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
42"
CN9101
CN8101
to SSB
to panel
14
12
DIM
VLED_1+
ON/OFF
n.c.
PS_ON
VLED_1-
2D/3D
VLED_1-
back to
div.table
TPR14.1A LA
7.
LVDS
AMP
AMP
12V
Platform
RTD2644DD
CN701
1 power- PCB
48"
CN9301
CN8101
to SSB
to panel
14
12
DIM
VLED+
ON/OFF
n.c.
PS_ON
VLED_1
2D/3D
VLED_1
EN 23
12V
19720_201.eps
2014-Jul-18
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