Philips 4101 Series Service Manual page 27

7.2 Power Supply
Refer to figure Figure 7-2
platform.
CN8602(For 715G7734)
CN8601(For 715G6934)
CN8101(For 715G6338)
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 TPN16.2E LA classis platform are:
• New power architecture for LED backlight
• "Boost"-signal is now a PWM-signal + continuous variable.
The control signals are:
• 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:
• +5V output (stand-by mode)
• +12V (on-mode)
• +12V_audio (audio power)
• +25V (Boost for backlight for 715G7734)
• +31V (Boost for backlight for 715G6934)
• +50V (Boost for backlight for 715G6338)
• 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
Circuit Descriptions
Platform power
BL-ON/OFF
DIM
PS-ON
12V
12V_A
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 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.
back to
div. table
TPN16.2E LA 7.
AMP LVDS AMP
12V
Platform
NT72453
CN701
1 power- PCB
EN 27
12V
20060_201.eps
2016-Jul-15