Circuit Descriptions
7.
7.2
Power Supply
Refer to figure
for the power architecture of this
platform.
Figure 7-3 Power Architecture 3500 series
7.2.1
Power Supply Unit
All power supplies for TV’s that are using a CCFL back lit LCD
panel are outside the repair policy. However when defective,
first check the main fuse of the power board. 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.
The used control signals are:
•
Stand-by
•
Inverter “on/off”
•
DIM (PWM)
The output voltages to the chassis are:
•
+3V3-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
MTK5366
PFC
Platform power
1 power- PCB
AMP
LVDS AMP
Low stby
power
Ac-input + Mains filter
BL-ON/OFF
AC IN
CN902
CN8101
CN8102
DIM
12V
12V
24V
24V
5V
CN7001
19230_202_120309.eps
120309
Connector
3xPFL35x7
4xPFL35x7
no.
CN801
CN802
CN8503
CN9901
Descr.
to panel
to panel
to panel
Mains inlet
Pin
3
3
13
2
1
L
L
ON/OFF
L
2
L
L
PDIM
N
3
L
L
+12V
-
4
-
-
+12V
-
5
-
-
GND
-
6
-
-
GND
-
7
-
-
GND
-
8
-
-
+24V
-
9
-
-
+24V
-
10
-
-
PS_ON
-