Riddled TV Repair Forum

Kraken · Joined: 15 Jan 2009 Posts: 3

My Philips rear projection tvs convergence is gone. I have tried adjusting it in the user and service menus but it won't stay.

This tells me that the convergence circuit is kaput and needs to be replaced.

I am perfectly able to make the repair I am just unable to identify what part I need to order.

Any help you all could offer would be greatly appreciated.

Regards

Google

Jesse Mack · Joined: 22 May 2008 Posts: 600 Location: The Last Frontier

The part of this statement that needs to be made clear is "but it won't stay". Do you mean all of the colors adjust and wont stay adjusted or do you mean that the colors will not move at all?

Jesse

Kraken · Joined: 15 Jan 2009 Posts: 3

Thanks for your response.

The convergence will adjust, but snaps back after 5 or 10 minutes of viewing.

I was reading on another forum that replacing the ICs should correct this.

Jesse Mack · Joined: 22 May 2008 Posts: 600 Location: The Last Frontier

Frankly I have never seen this symptom behave exactly in this way. Usually if the adjustments work they will stay. However, replacing the STK's would be my first choice as the alternative is a very major convergence procedure after replacing the ACS pcb assy.

That being said, the STK's are located on the large heat sink on the right edge in the back of the left hand side circuit board. Also look at the light grey 2 watt resistors that stand up on the circuit board just to the left and rearward of the STK's. They run hot and will overheat if the STK's start going bad. This is all as being viewed from the back of the set.

If you choose to replace the STK's please note on this set it gets very messy as to harnessing and removing the circuit board to work on it. There are two different sized torex screws and normal screwdrivers are of no use. Be carefull removing the SSB circuit board as the socket is fragile.

Hoe this helps

Jesse

Kraken · Joined: 15 Jan 2009 Posts: 3

Thanks Jesse.

I have already ordered the STK's and laid eyeballs on the components in question and noticed the torex and have the proper drivers in my kit.

Thanks for pointing out the resistors, I'll just go ahead and test them while I have it all apart and replace if needed.

Regards

Google

Jesse Mack · Joined: 22 May 2008 Posts: 600 Location: The Last Frontier

I do not know what your skills are but here is a suggestion that most people do not do and regret it.

After replacing the STK's and before reassembly, USE A MAGNIFYING GLASS and inspect the soldering on the STK's. The pins are small and it is EXTREEMLY easy to create a solder bridge and not be able to see the bridge with the naked eye.

Hope this helps

Jesse