Circuit Descriptions
7.
7.2
Power Supply
Refer to figure
for the power architecture of this
platform.
Figure 7-2 Power Architecture
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 TPS16.2A 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:
•
+8.5V output (stand-by mode)
•
+12V (on-mode)
•
+12V_audio (audio power)
•
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 panel is conventional IPB
•
LED backlight:
- side-view LED without scanning: PSL power panel
- side-view LED with scanning: PSLS power panel
- direct-view LED without 2D-dimming: PSL power panel
- direct-view LED with 2D-dimming: PSDL power panel.
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
Platform
MSD8590QV
AUDIO
AMP
LVDS
24V
12V
CN701
AC IN
DIM
BL-ON/OFF
12V
AC input +
Main filter
Display Power
Platform power
PFC
Lower Stby
Power
CN8601
CN8101
1 power-PCB
PS_ON
20200_201.eps
Number
Connector
CN9101
CN8601
CN9301
CN8101
CN9101
CN8101
Description to SSB
to panel
to SSB
to panel
to SSB
to panel
Pin
16
12
16
12
16
12
1
DIM
+VLED
DIM
+VLED
DIM
+VLED
2
BL_O/F
n.c.
BL_O/F
n.c.
BL_O/F
n.c.
3
PS_ON
+VLED1
PS_ON
+VLED1
PS_ON
+VLED1
4
3D_ON
+VLED1
3D_ON
+VLED1
3D_ON
+VLED1
5
GND
+VLED1
GND
+VLED1
GND
+VLED1
