Philips 32PHT5102/56, Service Manual

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6.2 Power Supply
Power architecture of this platform.
6.2.1 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 platform are:
• New power architecture for LED backlight
• “Boost”-signal is now a PWM- 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.
• +12 output (on-mode)
• +12V_audio (audio AMP power)
• 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.
6.2.2 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 P ower S upply with integrated L ED-drivers.