Circuit Descriptions
7.
7.2
Power Supply
Refer to figure
for the power architecture of this
platform.
Figure 7-3 Power Architecture
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 TPS14.1A LA classis platform are:
•
New power architecture for LED backlight
•
“Boost” signal is now a PWM- 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 (+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.
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
MST6931
PFC(Except Small inch)
Platform power
1 power- PCB
AMP
LVDS
AMP
Low stby
power
Ac-input + Mains filter
BL-ON/OFF
AC IN
DIM
12V
12V
24V
12V-Audio
Display Interfacing
CN8101
CN9901
CN701
19660_203.eps
Connector
24PHA4x09
32PHA4509
40PFA4509
50PFA4509
no.
CN8101
CN9904
CN8101
CN9101
CN8101
CN9101
CN8101
CN9301
Descr.
to panel
to SSB
to panel
to SSB
to panel
to SSB
to panel
to SSB
Pin
8
14
8
14
12
14
12
14
1
LED1
DIM
VLED+
DIM
DIM
VLED+
DIM
2
LED2
ON/OFF
VLED+
ON/OFF
n.c.
ON/OFF
n.c.
ON/OFF
3
VLED+
n.c.
n.c.
n.c.
VLED_1-
PS_ON
VLED_1
PS_ON
4
VLED+
n.c.
n.c.
n.c.
VLED_1-
2D/3D
VLED_1
2D/3D
