Question about Philips 27PT5445 27" TV

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Mkgregory I have a Philips 27PT5445/37 television with a vertical linearity problem. The picture is cut off on the top. I have changed or checked all of the electrolytic capacitors and resistors in the vertical circuit. There is no adjustment for linearity. There is an adjustment for vertical height.

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Re: mkgregory

If the TV supports it, you can go into service mode by press ing the following on the remote control:

062596 i

This will take you into a service menu. It also changes channel as you press the keys, so change to a used channel to get a picture back.

I am not familiar with this model, but the principles should be the same.

Using the remote control to navigate the menu, you are looking for "allignments", and from there "Vertical Amplitude" or V/AMP or VA or similar.

BE CAREFUL when making adjustments, as you can permanently damage the TV if you adjust any critical settings.

When making changes, make a note of the original setting so you can put it back if its not the right option. Also only make changes 1 notch at a time. It will be obvious when you have the correct option, so if nothing is happening after 2 or 3 notches, then put it back. This will minimise risk to the TV.

When you have finished, look for a "Save settings" option, if not just press standby to get out of the service menu.

Posted on Feb 23, 2008

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Regards Vintie

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Hello This is an indication that your vertical output stage is beginning to malfunction. It could be the vertical output IC or the vertical coupling capacitor. I would suggest using the schematic and an oscilloscope to determine if the signal is correct. You may have to replace the IC or the capacitor.

I hope this helps,

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