Picture Shrinks and Expands

If your TV is shrinking and expanding you can get a repair kit from www.TvRepairKits.com for less than 50.00
Comments: May 19, 2009- If your TV is shrinking and expanding you can get a repair kit from www.TvRepairKits.com for less than 50.00 May 22, 2009- Here are the most common symptoms and example photos of this problem.

• Video Shrinks and Expands - Over and Over - After warming up it typicaly works.
• After a few weeks the shrinking stops and you loose all video and audio.

SOLUTION

Its a fairly easy DIY job. Check the site www.TvRepairKits.com

Their kits include a photo instruction guide, parts, email/phone support, etc.

What is the model no?

If you have the following symptoms check the site www.TvRepairKits.com . They have a repair kit for this problem. 


Screen shrinks and expands - may or may not correct itself after the TV warms up. After a few days, weeks, or months of having the shrinking/expanding problem you may loose all audio/video but the power light will remain lit!

Hope this helps,

If you have the following symptoms check the site www.TvRepairKits.com . They have a repair kit for this problem. 


Screen shrinks and expands - may or may not correct itself after the TV warms up. After a few days, weeks, or months of having the shrinking/expanding problem you may loose all audio/video but the power light will remain lit!



Works on the following Philips Magnavox sets with chassis number



PTV835, PTV836, PTV840, PTV841, PTV842, PTV843, PTV844, PTV847, PTV853 


Or if your Model number is... 



50YP43C101,50YP43C102,50YP44C101,50YP44C102,50YP44C103,50YP44C104,55P9161001,55P9161002,55P9161003,55P9161004,55P9271001,55P9271002,55P9271003, 55P9271004, 55P9271005, 55YP43C101, 55YP43C102, 55YP43C103, 55YP43C104, 55YP44C101, 55YP44C102, 55YP44C103, 55YP44C104, 55YP45C, 60P9161001, 60P9161002, 60P9161003, 60P9161004, 60P9271001, 60P9271002, 60P9271003, 60P9271004, 60P9271005, 60YP43C101, 60YP43C102, 60YP43C103, 60YP43C104, 64P9161001, 64P9161002, 64P9161003, 64P9161004, 64P9161005, 64P9161006, 64P9271001, 64P9271002, 64P9271003, 64P9271004, 64P9271005, 64P9271006, 64P9271007, 9P5031C101, 9P5031C102, 9P5031C103, 9P5034C101, 9P5034C102, 9P5034C103, 9P5040C101, 9P5040C102, 9P5040C103, 9P5040C104, 9P5044C101, 9P5044C102, 9P5044C103, 9P5044C104, 9P5511C101, 9P5511C102, 9P5514C101, 9P5514C102, 9P5531C101, 9P5531C102, 9P5531C103, 9P5534C101, 9P5534C102, 9P5534C103, 9P5540C101, 9P5540C102, 9P5540C103, 9P5540C104, 9P5544C101, 9P5544C102, 9P5544C103, 9P5544C104, 9P6031C101, 9P6031C102, 9P6031C103, 9P60349101, 9P60349102, 9P60349103, 9P6034C101, 9P6034C102, 9P6034C103, 9P6040C101, 9P6040C102, 9P6040C103, 9P6040C104, 9P6044C101, 9P6044C102, 9P6044C103, 9P6044C104, 9P6440C101, 9P6440C102, 9P6440C103, 9P6440C104, 9P6440C105, 9P6444C101, 9P6444C102, 9P6444C103, 9P6444C104, 9P6444C105, PV5571C101, PV5571C102, PV5571C103, PV5571C104, PV6071C101, PV6071C102, PV6071C103, PV6071C103, PV6071C104

Not positive but this sounds like the impending failure of a specific power supply, namely an output providing deflection voltage to the CRTs. This may be simply a circuit on the main supply or could be a separate supply on a different board than the main supply.
If it is not affecting brightness and contrast, it isn't likely to be the primary supply that is failing. I'm pretty sure it will continue to degrade.  

If you have any of the following problems you may want to check the site www.tvrepairkits.com for a repair kit. Most of the issue below are fairly common with the older Magnavox projection sets. 

Symptom: Screen shrinks and expands - may or may not correct itself after the TV warms up. After a few days, weeks, or months of having the shrinking/expanding problem you may loose all audio/video but the power light will remain lit!

(Note: The below symptoms typicaly occurs after having the expanding/shrinking screen problem above)

Symptom: No Audio or Video but power light is on

Symptom: Audio works but no Video. Power light still work

Symptom: No Video. Audio is intermittent. Power light still works

It should have in the menu ,under settings ,, convergenge,, it realines the colors,, ,,

If the video shrinks and expands you can get a repair kit from www.TvRepairKit.com. 

philips part# 483520988561 actual part# HCNW136 opto coupler datasheet at datasheetcatalog.com can buy many places just enter it on google.
other fixes philips part# 483520987834 actual # MC34065p and philips# 483520987712 actual# SC78104 some change all 3 and never have a problem again.