REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Tuesday 5 February 2019

PHILIPS 42 INCH AND 32 INCH LCD TVS – 42PFL7603D12 SMPS CIRCUIT DIAGRAM

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
Posted By: FRANK at 04:42
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