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My Metz tv Model 72tc84 Problem: East-west correction is faulty exemple both left and right side were curve in

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  • Master
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Hi and welcome to FixYa,

The East-West correction circuitry together with the Pincuhion and Parabola correction are essential part of the horizontal deflection in a CRT base TV unit. Normally, ICs are used and therefore would be the prime suspect if failure in any of these correction circuitries. Examples of ICs used are AN10294, TDA4950, TDA 8145 and still others.

This of course requires opening the unit, perform voltage measurements, determine the faulty component and subsequent parts replacement. This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings.Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 09, 2008

  • Louie  Role
    Louie Role Dec 12, 2008

    Hi again,



    Any updates or developments so far?



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  • Master
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What you like to do ....

Posted on Dec 09, 2008

  • futureloginn
    futureloginn Dec 10, 2008

    do you want service manual??


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3 Answers

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You should direct your attention to the East/West correction
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Hi, The Logik lk74pf flyback that you replaced. What did you replaced it with. I also have the same tv with the same problem. Also found a 1k resistor blown in the supply line from the flyback to the vertical deflection circuit.

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I have a tedelex ec29187 with a funny picture. The sides seem to be bend inwards. A guy said they call it a east west problem. Help me with a solution please.


Ity is an East West porblem [Pin-cushion distortion] itself. You ahve to check its pin cushhion circuit to detect faulty component/s.

Apr 12, 2012 | Televison & Video

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My 27inch Sanyo tv screen is shrinking-sides have curved black is=nstead of the full picture. Can you advise what this might be?


That is caused by an East West Modulator fault. That will give you an Hour Glass picture.
Check for dry joints around the line output stage and faulty driver transistors.
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Dec 17, 2010 | Televison & Video

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May 23, 2010 | Quasar SP-2725 27" TV

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Need a better description. Sounds like either lack of B+ supply giving lack of width, low EHT, or you have East West transductor circuit being faulty. Is there lack of width and is it bowed in? Might be a dry joint around this area as the transductor resonates at line frequency making this dry jointed. Need a manual meter to diagnose correctly I am afraid.

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hi there.im not familiar wih the model,but your fault lies in the east west correction circuit.excessive width usually means a short circuit e/w modulator diode,with the curved sides.normally,a narrow picture with curved sides points do dry jointed/open circuit polyester capacitor.if a firm slap has an effect,then its most likely a dry joint which makes for an easy life.the vast majority of east west correction circuits are based in tle line output stage,and generally not complex to fix.hope this helps,regads,steve.ps. look for s/c by 299 and by 228 diodes,check those..

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1 Answer

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This fault is referred to as an East-West pin-cushion fault. Depending on the make and model, it can mean that some capacitor(s) have failed (dried-out) or a single medium power transistor or both in the pin-cushion correction circuit have failed.

In any event it isn't a very big problem to fix. A competent technician nearby ought to sort it out quickly. Also, if you area tech then please post additional information on the make and model and you'll get more technical data. Good luck.

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