Friday, August 12, 2016

Philips 42 inch and 32 inch LCD TVs – 42PFL7603D12 SMPS circuit diagram

42PFL7603D-12,  42PFL5603H-10  Philips LCD TV Power Supply Schematic
  The 32" sets in this chassis come with the PLCD170PS09B power supply unit. From this supply unit, no detailed description is available. When defective, a new panel must be ordered and the defective panel must be sent for repair, unless the main fuse of the panel is broken. Always replace a defective panel with one with the correct specifications! This part is available in the regular market.
  The 42" sets in this chassis come with a buy-in Delta Supply unit and is a black-box for Service. When defective, a new panel must be ordered and the defective panel must be sent for repair, unless the main fuse of the panel is broken. Always replace a defective fuse with one with the correct specifications. This part is available in the regular market.
The Supply unit delivers the following voltages to the chassis
• High voltage to drive the backlight units (no inverters needed)
• 3.3 VSB (connector CN6)
• 12 V (connector CN7)
• +12 VA (connector CN6)
• - 12 VA (connector CN6)
• 24 VA (connector CN4).
SMPS circuit diagram and PWB
Click on the pictures to magnify
DC/DC3V3, 1V2
DC/DC 5V, 1V4 
DC output protections
Over Voltage Protection
In case of an over-voltage situation, the Supply unit will shut down. To restart: disconnect from AC, except in the event the over-voltage situation occurred at the 3.3 VSB output (auto recovery).
Short Circuit Protection
In case a short-circuit situation occurs at the 12 V, 12 VB or 24 VA output, the Supply unit will shut down. To restart: disconnect from AC.
In case a short-circuit situation occurs at one of the + 12 VA or - 12 VA outputs, the fuse will break.
In case a short-circuit situation occurs at the 3.3 VSB output, the Supply unit will auto-recover when the fault condition is removed.
AC output protections
Both Short-Lamp and Open-Lamp protections have been foreseen. To restart: disconnect from AC.
This chassis (member of the “TV522“platform) is a derivative from the Q528.1E LA chassis (member of the “TV520” platform). It comes with a new styling called “ME8(+)” which, in some sets, incorporates a light strip on the front side of the set referred to as “Light Guide”. This generates a diffuse light through a light pipe.
Reset of Repaired SSB
A very important issue towards a repaired SSB from a service repair shop, implies the reset of the NVM on the SSB.
A repaired SSB in service should get the service Set type “00PF0000000000” and Production code “00000000000000”.
Also the virgin bit is to be set. To set all this, you can use the ComPair tool.
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