Circuit Descriptions
7.
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 5011 platform are:
•
New power architecture for LED backlight
•
“Boost”-signal is now a PWM- continuous variable.
The control signals are:
•
Lamp “on/off”
•
DIM (PWM)
In this manual, no detailed information is available because of
design protection issues.
The output voltages to the chassis are:
•
+12V(on-mode)
•
+8.5V(Standby-mode)for main board and audio amplifier
•
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
7.3
DC/DC Converters
The on-board DC/DC converters deliver the following voltages
(depending on set execution):
•
STB_PWR, permanent voltage for the Stand-by Power
system and WIFI
•
+3V3SB,voltage for scaler, EMMC, IR/LED reciver, Key
board
•
+12V, input from the power supply for the panel common
(active mode)
•
+12V, input from the power supply for LNB supply
•
LDO_PWR, DVDD3V3, voltage for EMMC when TV on
•
DDRV, VCCK, voltage for DDR
•
AVDD3V3, AVDD1V0, supply voltage for scaler MT5593
•
+5V_SW, USB port supply voltage
•
+3V3_TUNER, supply voltage for tuner
•
+5V_SW, input intermediate supply voltage for USB Power
•
PVDD from the power +12V_AU for the AUDIO AMP
•
DV12, +3.3V_T2, +3.3VA_T2 voltage for Demodulator IC
channel decoder
•
Wi-Fi_VCC,voltage for WIFI
Figures gives a graphical representation of the DC/DC
converters with its current consumptions:
Connector
Model
32" 40"
Number
CN9101
CN8601
CN9303
CN8101
Description
to SSB
to panel
to SSB
to panel
Pin
16
6
16
12
1
DIM
VLED+
DIM
+VLED
2
ON/OFF
VLED+
BL_ON/OFF
n.c.
3
PS_ON
n.c.
PS_ON
-VLED-1
4
n.c.
n.c.
3D_ON
-VLED-1
5
GND
VLED-
GND
-VLED-1
6
GND
VLED-
GND
n.c.
7
GND
-
GND
n.c.
8
GND
-
GND
-VLED-2
9
+12V-Audio
-
+12V-Audio
-VLED-2
10
+12V-Audio
-
+12V-Audio
-VLED-2
11
+12V
-
+12V
n.c.
12
+12V
-
+12V
+VLED
13
+12V
-
+12V
-
14
+12V
-
+12V
-
15
+3.5V/+5V
-
+3.5V/+5V
-
16
+3.5V/+5V
-
+3.5V/+5V
-
