Philips 19PFL3507T/60 Service Manual page 29

7.2 Power Supply
Refer to figure Figure 7-2
platform.
CN8103
Display power
PFC
7.2.1 Power Supply Unit
All power supplies for TPM chassis TV's are outside 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.
Important delta's with the S35 series platform are:
• New power architecture for LED backlight (PSL, PSLS,
PSDL)
• "Boost"-signal is now a PWM-signal + continuous variable.
The control signals are:
• Stand-by
• Inverter "on/off"
• DIM (PWM) (not for PSDL)
• Boost (PWM except for IPB)
In this manual, no detailed information is available because of
design protection issues.
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.
for the power architecture of this
Ac-input + Mains filter
Figure 7-2 Power Architecture S35 series
Circuit Descriptions
Platform power
BL-ON/OFF
DIM
16V
5V
Low stby
power
AC IN
CN9901
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
Number
Description
Pin
1
2
3
4
5
6
7
8
back to
div. table
TPM9.3E LA 7.
FFC AMP
5V
Platform
MTK5366
CN7001
1 power- PCB
Connector
CN8101 CN8102 CN8103 CN901
to panel to panel to panel Mains inlet
6 2 6 2
LED1 LED1 LED1 L
LED2 VLED+ LED2 N
VLED+ - VLED+ -
VLED+ - VLED+ -
LED3 - LED3 -
LED4 - LED4 -
- - - -
- - - -
EN 29
19270_201_120410.eps
120412
CN9101
to SSB
13
Not connected
+5.2 V
+5.2 V
Power Standby
12 to 16 V
12 to 16 V
GND
GND
2013-Mar-01