Philips TPN15.2E LA Service Manual page 26

EN 26 7. TPN15.2E LA
7.2 Power Supply
Refer to figure Figure 7-2
platform.
CN8101(715G6677P)
CN8101(715G6338P)
Display power
PFC
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 TPN15.2E LA classis platform are:
• New power architecture for LED backlight
• "Boost"-signal is now a PWM-signal + continuous variable.
The control signals are:
• PS_ON
• 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(Stand-by mode for 715G6677)
• 3.5V(Stand-by mode for 715G6973)
• +12V (on-mode)
• +12V_audio (audio power)
• +35V VLED output(on-mode for 715G6677)
• +37.4V VLED output(on-mode for 715G6973)
• 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.
2015-Nov-27
Circuit Descriptions
for the power architecture of this
Platform power
Low stby
power
Ac-input + Mains filter
Figure 7-2 Power Architecture
BL-ON/OFF
DIM
PS-ON
12V
12V_A
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 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
Number
Descriptio
n
Pin
1
2
3
4
5
back to
div. table
AMP LVDS AMP
12V 12V
Platform
NT72666
CN701
1 power- PCB
Connector
43"&49" 55"
CN9303 CN8101 CN9101
to SSB to panel to SSB
16 12 16
DIM +VLED DIM
On/off n.c. On/off
PS_ON -VLED1 PS_ON
3D_ON -VLED1 3D_ON
GND -VLED1 GND
19970_201.eps
CN8601
to panel
12
VLED
n.c.
LED1
LED1
LED1